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HomeMy WebLinkAboutSIT AND STAY DOG BAR - FDP230005 - SUBMITTAL DOCUMENTS - ROUND 3 - Stormwater Management Plan STORMWATER POLLUTION PREVENTION PLAN Designed in accordance with the CDPS Permits Stormwater Discharge Associated with Construction Activity Lot 3, COUNTRY CLUB CORNERS SIXTH FILING Permit Tracking # Owner/Operator: Patrick Duncan Sit & Stay, LLC 1121 Belaire Drive Fort Collins, CO 80521 Prepared by: Olsson, Inc. 1880 Fall River Drive, Suite 200 Loveland, CO 80538 (970) 461-7733 May 2024 SWMP Certification: I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Name: Title: Signature: Date: Olsson / i TABLE OF CONTENTS Section 1 ......................................................... Delegation Statements & Contractor Certifications Section 2 ............................................................................................................... Notice of Intent Section 3 ................................................................ Permit Authorization & CDPS General Permit Section 4 ............................................................................................................ SWMP Narrative Section 5 .............................................. Location/Topographical Map(s), FIRM Maps, Soils Maps Section 6 ................................................ SWMP Tracking Map & Land Disturbance Tracking Log Section 7 ............................................................................. BMP Specification and Detail Sheets Section 8 ............................................................................................................ Log of Revisions Section 9 ...................................................................... Local Regulations and Additional Permits Section 10 ..................................................................................... Low Risk Discharge Guidance Section 11 ............................................................................................................. Spill Response Section 12 ........................................................................... Endangered Species Documentation Section 13 ........................................................................... Historic Preservation Documentation Section 14 ......................................................................................................... Inspection Report Section 15 ........................................................................................ Regulatory Correspondance Section 16………………………………………………………………………….Notice of Termination SECTION 1 Delegation Statements & Contractor Certifications Delegation Statement(s) for applicable personnel should be kept in this section. Contractor Certification Statements that contain contact information for those responsible for specific activities on the project should also be kept here. Delegation of Authority I, , hereby designate the person(s) or specifically described position(s) below to be an authorized representative(s) for the purpose of overseeing compliance with environmental requirements, including the CPDS General Permit Stormwater Discharges Associated with Construction Activity. Authorized Representative: Name or Position: Company: Address: Phone: Email: The designated authorized representative should complete a Contractor/Subcontractor Certification located in Section 1 of the SWMP signifying they have read, understand and will adhere the requirements set forth in the SWMP. I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Permittee Name: Company: Title: Signature: Date: Delegation of Authority I, , hereby designate the person(s) or specifically described position(s) below to be an authorized representative(s) for the purpose of overseeing compliance with environmental requirements, including the CPDS General Permit Stormwater Discharges Associated with Construction Activity. Authorized Representative: Name or Position: Company: Address: Phone: Email: The designated authorized representative should complete a Contractor/Subcontractor Certification located in Section 1 of the SWMP signifying they have read, understand and will adhere the requirements set forth in the SWMP. I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Permittee Name: Company: Title: Signature: Date: Contractor/Subcontractor Certification Project Name: Permit Number: Project Owner: As a contractor/subcontractor, you are required to comply with the Stormwater Management Plan (SWMP) for any work that you perform or oversee on-site. Any person or group who violates any condition of the SWMP may be subject to substantial penalties or loss of contract. You are encouraged to advise each of your employees working on this project of the requirements of the SWMP. A copy of the SWMP is available for your review upon request. Each contractor/subcontractor engaged in activities at the construction site that could impact stormwater should be identified and sign the following certification statement: I certify under the penalty of law that I have read and understand the terms and conditions of the SWMP for the above designated project and agree to follow the practices described in the SWMP. This certification is hereby signed in reference to the project named above: Service Provided: Company Name: Address: Telephone: Representative: Title: Signature: Date: Contractor/Subcontractor Certification Project Name: Permit Number: Project Owner: As a contractor/subcontractor, you are required to comply with the Stormwater Management Plan (SWMP) for any work that you perform or oversee on-site. Any person or group who violates any condition of the SWMP may be subject to substantial penalties or loss of contract. You are encouraged to advise each of your employees working on this project of the requirements of the SWMP. A copy of the SWMP is available for your review upon request. Each contractor/subcontractor engaged in activities at the construction site that could impact stormwater should be identified and sign the following certification statement: I certify under the penalty of law that I have read and understand the terms and conditions of the SWMP for the above designated project and agree to follow the practices described in the SWMP. This certification is hereby signed in reference to the project named above: Service Provided: Company Name: Address: Telephone: Representative: Title: Signature: Date: Contractor/Subcontractor Certification Project Name: Permit Number: Project Owner: As a contractor/subcontractor, you are required to comply with the Stormwater Management Plan (SWMP) for any work that you perform or oversee on-site. Any person or group who violates any condition of the SWMP may be subject to substantial penalties or loss of contract. You are encouraged to advise each of your employees working on this project of the requirements of the SWMP. A copy of the SWMP is available for your review upon request. Each contractor/subcontractor engaged in activities at the construction site that could impact stormwater should be identified and sign the following certification statement: I certify under the penalty of law that I have read and understand the terms and conditions of the SWMP for the above designated project and agree to follow the practices described in the SWMP. This certification is hereby signed in reference to the project named above: Service Provided: Company Name: Address: Telephone: Representative: Title: Signature: Date: Contractor/Subcontractor Certification Project Name: Permit Number: Project Owner: As a contractor/subcontractor, you are required to comply with the Stormwater Management Plan (SWMP) for any work that you perform or oversee on-site. Any person or group who violates any condition of the SWMP may be subject to substantial penalties or loss of contract. You are encouraged to advise each of your employees working on this project of the requirements of the SWMP. A copy of the SWMP is available for your review upon request. Each contractor/subcontractor engaged in activities at the construction site that could impact stormwater should be identified and sign the following certification statement: I certify under the penalty of law that I have read and understand the terms and conditions of the SWMP for the above designated project and agree to follow the practices described in the SWMP. This certification is hereby signed in reference to the project named above: Service Provided: Company Name: Address: Telephone: Representative: Title: Signature: Date: SECTION 2 Notice of Intent A copy of the signed Notice of Intent can be found here. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 1 Notice of Intent Updated definitions can be found in the COR400000 permit language located in Section 3 of this SWMP binder The General Contractor and all subcontractors involved with a construction activity that disturbs site soil or who implement a pollutant control measure identified in the SWMP, or otherwise required, must comply with the following requirements of the National Pollutant Discharge Elimination System (NPDES) General Permit per the delegated governing agency having jurisdiction concerning NPDES, stormwater, erosion, and sedimentation control: The Owner and Operator will petition the Colorado Department of Public Health and Environment (CDPHE) for stormwater discharges during construction at this site to be covered by the CPDS General Permit Stormwater Discharges Associated with Construction Activity Authorization to Discharge Under the Colorado Discharge Permit System (CDPS) following completion of this SWMP. An NOI (using the form required by the federal, state, and/or local permitting agency), to be covered under this permit, will be filed by the Operator, if required. Authorization to discharge stormwater from Construction Activities is effective upon receipt of permit authorization by the state environmental agency. The SWMP must be prepared prior to submittal of the NOI. It is the Contractor’s obligation to verify with the state agency if it will be authorized under the Operator’s permit or if a separate permit will be required. SECTION 3 Permit Authorization & CDPS General Permit Stormwater Discharges Associated with Construction Activity Permit authorization from the CDPHE and a copy of the CDPS General Permit COR400000 Stormwater Discharges Associated with Construction Activity will be kept in this section. Dedicated to protecting and improving the health and environment of the people of Colorado CDPS GENERAL PERMIT COR400000 STORMWATER DISCHARGES ASSOCIATED WITH CONSTRUCTION ACTIVITY AUTHORIZATION TO DISCHARGE UNDER THE COLORADO DISCHARGE PERMIT SYSTEM (CDPS) In compliance with the provisions of the Colorado Water Quality Control Act, (25-8-101 et seq., CRS, 1973 as amended) and the Federal Water Pollution Control Act, as amended (33 U.S.C. 1251 et seq.; the "Act"), this permit authorizes the discharge of stormwater associated with construction activities, as defined in this permit, to be certified under this permit from those locations authorized to discharge from authorized locations throughout the State of Colorado to specified surface waters of the state, in accordance with the eligibility and permit application requirements, effluent limitations, monitoring requirements, inspection requirements, and other conditions set forth in this general permit. This permit specifically authorizes the facility listed on the certification to discharge in accordance with permit requirements and conditions set forth in Parts I and II hereof. All discharges authorized herein must be consistent with the terms and conditions of this permit. This permit becomes effective on, 04/01/2024 and will expire at midnight 03/31/2029. Issued and signed this 31st day of January, 2024 and Effective April 1, 2024. Andrew Sayers-Fay, Permits Section Manager Water Quality Control Division COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT PERMITS ACTION SUMMARY Issued January 31, 2024, Effective April 1, 2024 Page 2 of 31 Permit No. COR400000 Table of Contents PART I ........................................................................................................................................... 2 COVERAGE UNDER THIS PERMIT ........................................................................................... 2 1. Authorized Discharges ..................................................................................................... 2 2. Limitations on Coverage .................................................................................................. 2 3. Permit Certification and Submittal Procedures ....................................................................... 3 EFFLUENT LIMITATIONS ..................................................................................................... 7 1. Requirements for Control Measures Used to Meet Effluent Limitations .......................................... 7 2. Discharges to an Impaired Waterbody or Outstanding Water ..................................................... 10 3. General Requirements .................................................................................................. 11 STORMWATER MANAGEMENT PLAN REQUIREMENTS .................................................................. 11 1. Stormwater Management Plan General Requirements ............................................................. 11 2. Stormwater Management Plan Content .............................................................................. 12 3. Stormwater Management Plan Review and Revisions .............................................................. 14 4. Stormwater Management Plan Availability .......................................................................... 15 SITE INSPECTIONS .......................................................................................................... 15 1. Person Responsible for Conducting Inspections ..................................................................... 15 2. Inspection Frequency.................................................................................................... 15 3. Inspection Frequency for Discharges to Outstanding Waters ..................................................... 16 4. Reduced Inspection Frequency ........................................................................................ 16 5. Inspection Scope ......................................................................................................... 16 DEFINITIONS ................................................................................................................ 18 MONITORING ................................................................................................................ 21 OIL AND GAS CONSTRUCTION ............................................................................................ 21 PART II ........................................................................................................................................ 22 DUTY TO COMPLY .......................................................................................................... 22 DUTY TO REAPPLY ......................................................................................................... 22 NEED TO HALT OR REDUCE ACTIVITY NOT A DEFENSE ............................................................... 22 DUTY TO MITIGATE ........................................................................................................ 23 PROPER OPERATION AND MAINTENANCE ............................................................................... 23 PERMIT ACTIONS ........................................................................................................... 23 PROPERTY RIGHTS ......................................................................................................... 23 DUTY TO PROVIDE INFORMATION ........................................................................................ 23 INSPECTION AND ENTRY .................................................................................................. 23 MONITORING AND RECORDS .............................................................................................. 24 SIGNATORY REQUIREMENTS .............................................................................................. 24 REPORTING REQUIREMENTS .............................................................................................. 25 BYPASS ....................................................................................................................... 27 UPSET ........................................................................................................................ 27 REOPENER CLAUSE ......................................................................................................... 28 OTHER INFORMATION ...................................................................................................... 28 SEVERABILITY ............................................................................................................... 28 NOTIFICATION REQUIREMENTS ........................................................................................... 28 RESPONSIBILITIES .......................................................................................................... 29 OIL AND HAZARDOUS SUBSTANCES LIABILITY .......................................................................... 29 EMERGENCY POWERS ...................................................................................................... 29 CONFIDENTIALITY .......................................................................................................... 29 FEES .......................................................................................................................... 29 DURATION OF PERMIT ..................................................................................................... 29 SECTION 307 TOXICS....................................................................................................... 29 Page 2 of 31 Permit No. COR400000 PART I Note: At the first mention of terminology that has a specific connotation for the purposes of this permit, the terminology is electronically linked to the definitions section of the permit in Part I.E. COVERAGE UNDER THIS PERMIT This general permit authorizes permittee(s) to discharge the following to state waters: stormwater associated with construction activity and specified non-stormwater associated with construction activity. The following types of stormwater and non-stormwater discharges are authorized under this permit: Stormwater Discharges Stormwater discharges associated with construction activity. Stormwater discharges associated with producing earthen materials, such as soils, sand, and gravel dedicated to providing material to a single contiguous site, or within ¼ mile of the construction site covered by this permit (e.g. borrow or fill areas). Stormwater discharges associated with dedicated asphalt, concrete batch plants, and masonry mixing stations (Coverage under this permit is not required if alternative coverage has been obtained). Non-Stormwater Discharges The following non-stormwater discharges are allowable under this permit if the discharges are identified in the stormwater management plan in accordance with Part I.C and if they have appropriate control measures in accordance with Part I.B.1. Discharges from uncontaminated springs that do not originate from an area of land disturbance. Discharges to the ground of concrete or masonry washout water associated with the washing of concrete or masonry tools and concrete or masonry mixer chutes, and water used to wash vehicles, equipment and external buildings. Discharges of concrete or masonry washout water must not leave the site as surface runoff or reach receiving waters as defined by this permit. The addition of soaps, solvents and detergents is prohibited. Concrete or masonry on-site waste disposal is not authorized by this permit except in accordance with Part I.B.1.a.ii(c). Discharges of landscape irrigation return flow. Discharges from diversions of state waters within the permitted site. Emergency Fire Fighting Discharges resulting from emergency firefighting activities during the active emergency response are authorized by this permit. Discharges not authorized by this permit include, but are not limited to, the discharges and activities listed below. Permittees may seek individual or alternate general permit coverage for the discharges, or utilize low risk discharge guidance (i.e. Surface Cosmetic Power Washing Operations to Land) or clean water policy documents (i.e. Clean Water Policy #14) as appropriate and available. Discharges of non-stormwater Discharges of non-stormwater, except the authorized non-stormwater discharges listed in Part I.A.1.b., are not eligible for coverage under this permit. Note: The prohibited discharges listed here are not an exhaustive list. Discharges to surface water from water used to wash vehicles, equipment and external building washdown water. The addition of soaps, solvents and detergents is prohibited. Discharges from washout water for paint, form release oils, curing compounds, or other similar Page 3 of 31 Permit No. COR400000 construction materials. See Part I.B.1.a.ii(f). Discharges of fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance. Discharges of reclaimed water, as defined in Regulation 84, that are approved for the use of construction dust suppression but are not applied in accordance with Regulation 84. Discharges related to the application of potable water for dust suppression. See Part I.B.1.a.i(j). Discharges currently covered by another individual or general permit. Discharges currently covered by a Water Quality Control Division (division) Low Risk Guidance document or Clean Water Policy. Discharges to outstanding waters that are long-term and/or have no or only short-term ecological or water quality benefit or clear public interest. See Part I.B.2.b. Chemical additions. Any chemical addition for the treatment of stormwater associated with construction activities is not authorized. This includes but is not limited to flocculants, polymers, and coagulants. Duty to Apply The owner(s)/operator(s) must apply for coverage under this permit for discharges from the following activities: Construction activity that will disturb one acre or more; or Construction activity that is part of a common plan of development or sale; or Stormwater discharges that are designated by the division as needing a stormwater permit because the discharge: (a) Contributes to a violation of a water quality standard; or (b) Is a significant contributor of pollutants to state waters. Application Requirements To obtain authorization to discharge under this permit, applicants applying for coverage following the effective date of the renewal permit must meet the following requirements: Owners and operators submitting an application for permit coverage will be co-permittees subject to the same benefits, duties, and obligations under this permit. Signature requirements: Both the owner and operator (permittees) of the construction site, as defined in Part I.E., must agree to the terms and conditions of the permit and submit a completed application that includes the signature of both the owner and the operator. In cases where the duties of the owner and operator are managed by the owner, both application signatures may be completed by the owner. Both the owner and operator are responsible for ensuring compliance with all terms and conditions of the permit, including implementation of the stormwater management plan. The applicant(s) must develop a stormwater management plan in accordance with the requirements of Part I.C. The applicant(s) must also certify that the stormwater management plan is complete, or will be complete, prior to commencement of any construction activity. In order to apply for certification under this general permit, the applicant(s) must submit a complete, accurate, and signed permit application form as provided by the division by electronic delivery at least 10 days prior to the commencement of construction activity, except those construction activities that are in response to a public emergency related site. Public emergency related sites must apply for coverage no later than 14 days after the commencement of construction activities. The provisions of this part in no way remove a violation of the Colorado Water Quality Control Act if a point source discharge occurs prior to the issuance of a CDPS permit. Page 4 of 31 Permit No. COR400000 The application in its entirety must be submitted via the division’s online permitting system unless a waiver is granted by the division. If a waiver is granted, the application in its entirety, including signatures by both the owner and operator, must be submitted to: Colorado Department of Public Health and Environment Water Quality Control Division Permits Section, WQCD-PS-B2 4300 Cherry Creek Drive South Denver, CO 80246 The applicant(s) must receive written notification that the division granted permit coverage prior to conducting construction activities, except for construction activities that are in response to a public emergency related site. Division Review of Permit Application Within 10 days of receipt of the application, and following review of the application, the division may: Issue a certification of coverage under this general permit; Request additional information necessary to evaluate the discharge; Delay the authorization to discharge pending further review; Notify the applicant that additional terms and conditions are necessary; or Deny the authorization to discharge under this general permit. Alternative Permit Coverage Division Required Alternative Permit Coverage: The division may require an applicant or permittee to apply for an individual permit or an alternative general permit if it determines the discharge does not fall under the scope of this general permit, including if any additional terms and conditions are necessary in order to ensure that discharges authorized by this permit will not cause, have the reasonable potential to cause, or measurably contribute to an exceedance of any applicable water quality standard, including narrative standards for water quality. In this case, the division will notify the applicant or permittee that an individual permit application is required. Permittee Request for Alternative Permit Coverage: A permittee authorized to discharge stormwater under this permit may request to be excluded from coverage under this general permit by applying for an individual permit. In this case, the permittee must submit an individual application, with reasons supporting the request, to the division at least 180 days prior to any discharge. When an individual permit is issued, the permittee’s authorization to discharge under this permit is terminated on the effective date of the individual permit. Submittal Signature Requirements Documents required for submittal to the division in accordance with this permit, including applications for permit coverage and other documents as requested by the division, must include signatures by both the owner and the operator, except for instances where the duties of the owner and operator are managed by the owner. Signatures on all documents submitted to the division as required by this permit must meet the Standard Signatory Requirements in Part II.K of this permit in accordance with 40 C.F.R.122.41(k). Signature Certification Any person(s) signing documents required for submittal to the division must make the following certification: Page 5 of 31 Permit No. COR400000 “I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.” Field Wide Permit Coverage for Oil and Gas Construction At the discretion of the division, a single permit certification may be issued to a single oil and gas permittee to cover construction activity related discharges from an oil and gas field at multiple locations that are not necessarily contiguous. Permit Coverage without Application Qualifying Local Program: When a small construction site is within the jurisdiction of a qualifying local program, the owner and operator of the construction activity are authorized to discharge stormwater associated with small construction activity under this general permit without the submittal of an application to the division. Sites covered by a qualifying local program are exempt from the following sections of this general permit: Part I.A.3.a.; Part I.A.3.b. (division application requirements); Part I.A.3.c. (division review); Part I.A.3.d. (division alternate permit coverage); Part I.A.3.f. (oil and gas field wide coverage); Part I.A.3.h. (permittee initiated actions); Part I.A.3.i. (residential lot coverage); Part I.A.3.j. (permit expiration and continuation of coverage); Part II.L.3 (transfer of ownership or control); II.W (fees). Sites covered by a qualifying local program are subject to the following requirements: Local Agency Authority: This permit does not pre-empt or supersede the authority of local agencies to prohibit, restrict, or control discharges of stormwater to storm drain systems or other water courses within their jurisdiction. Permit Coverage Termination: When a site under a Qualifying Local Program is finally stabilized, coverage under this permit is automatically terminated. Compliance with Qualifying Local Program: Qualifying Local Program requirements that are equivalent to the requirements of this permit are incorporated by reference. Permittees authorized to discharge under this permit must comply with the equivalent requirements of the Qualifying Local Program that has jurisdiction over the site as a condition of this permit. Compliance with Remaining Permit Conditions. Requirements of this permit that are in addition to or more stringent than the requirements of the Qualifying Local Program apply in addition to the requirements of the Qualifying Local Program. Written Authorization of Coverage: The division or local municipality may require any owner/operator within the jurisdiction of a Qualifying Local Program covered under this permit to apply for, and obtain written authorization of coverage under this permit. The permittee must be notified in writing that an application for written authorization of coverage is required. Permittee Initiated Permit Actions Permittee initiated permit actions, including but not limited to modifications, contact changes, transfers, and terminations, must be conducted following Part II.L, Part I.A.3.e, division guidance and using appropriate division-provided forms. When a permittee modifies or terminates all or portions of permit coverage to another permittee, the “old” permittee completing the modification or termination must provide to the division the new permittee’s certification number(s) (ie. a land developer selling lots to home builders, etc.). When a permittee transfers permit coverage to another permittee, the “new” permittee completing the transfer must provide to the division an agreement completed and signed by the “old” permittee. Page 6 of 31 Permit No. COR400000 When a permittee transfers permit coverage or modifies or terminates all or portions of permit coverage to another permittee, the “old” permittee completing the transfer, modification, or termination must provide to the division documentation of due diligence when the new permittee is not obtaining permit coverage. Documentation of due diligence may include certified letters, multiple attempts at email and phone contact. Sale of Residence to Homeowner Residential construction sites only: The permittee may remove residential lots from permit coverage once the lot(s) meets all of the following criteria: The residential lot(s) has(have) been sold to the homeowner(s) for private residential use; A certificate of occupancy, or equivalent, is maintained on-site or electronically and is available during division inspections; The lot(s) is (are) less than one acre of disturbance; All construction activity conducted on the lot(s) by the permittee is complete, including the installation of sediment or erosion control measures that minimize sediment from exiting the lot, or the installation of temporary stabilization on remaining disturbance where the permittee is not responsible for final stabilization (i.e. backyard of single family home, etc.); The permittee is not responsible for final stabilization of the lot(s); and The stormwater management plan was modified to indicate the lot(s) is (are) no longer part of the construction activity. If the residential lot(s) meets the criteria listed above, then activities occurring on the lot(s) are no longer considered to be construction activities with a duty to apply and maintain permit coverage. Therefore, the permittee is not required to meet the final stabilization requirements and may terminate permit coverage for the lot(s). Permit Expiration and Continuation of Permit Coverage Authorization to discharge under this general permit will expire at midnight on March 31, 2029. While Regulation 61.4 requires the permittee to submit an application for continuing permit coverage 180 days before the permit expires, the division requires that a permittee or permittees desiring continued coverage under this general permit must reapply at least 90 days in advance of this permit expiration. The division will determine if the permittee(s) may continue to discharge stormwater under the terms of the general permit. An individual permit may be required for any facility not reauthorized to discharge under the reissued general permit. If this permit is not reissued or replaced prior to the expiration date, it will be administratively continued and remain in force and effect. For permittees that have applied for continued permit coverage, discharges authorized under this permit prior to the expiration date will automatically remain covered by this permit until the earliest of: An authorization to discharge under a reissued permit, or a replacement of this permit, following the timely and appropriate submittal of a complete application requesting authorization to discharge under the new permit and compliance with the requirements of the new permit. (Note: the division may not reissue a permit certification if there are outstanding past due fees per Regulation 61.15(d)); or The issuance and effect of a termination issued by the division; or The issuance or denial of an individual permit for the facility’s discharges; or A formal permit decision by the division not to reissue this general permit, at which time the division will identify a reasonable time period for covered dischargers to seek coverage under an alternative general permit or an individual permit. Coverage under this permit will cease when coverage under another permit is granted/authorized; or The division has informed the permittee that discharges previously authorized under this permit are no longer covered under this permit. Page 7 of 31 Permit No. COR400000 EFFLUENT LIMITATIONS The permittee must implement control measures to minimize the discharge of pollutants from all potential pollutant sources at the site which, if applicable, includes run-on. Control measures used to meet effluent limitations must be installed prior to commencement of construction activities and prior to each phase of construction that introduces new potential pollutant sources. Control measures must be selected, designed, installed and maintained in accordance with good engineering, hydrologic and pollution control practices. Control measures implemented at the site must be designed to prevent pollution or degradation of state waters. Stormwater Pollution Prevention The permittee must implement structural and/or nonstructural control measures that effectively minimize erosion, sediment transport, and the release of other pollutants related to construction activity. Control Measures for Erosion and Sediment Control Structural and non-structural control measures for erosion and sediment control may include, but are not limited to, wattles/sediment control logs, silt fences, earthen dikes, drainage swales, sediment traps, filter bags, subsurface drains, pipe slope drains, inlet protection, outlet protection, gabions, sediment basins, temporary vegetation, permanent vegetation, mulching, geotextiles, sod stabilization, and slope roughening, maintaining existing vegetation, preserving native topsoil, protection of trees, preservation of mature vegetation, phasing of site development, preserving natural topography, minimizing soil compaction in areas of vegetative final stabilization, and minimizing site access. Specific control measures must meet the requirements listed below. (a) Vehicle tracking controls must be implemented to minimize vehicle tracking of sediment from disturbed areas. Vehicle tracking controls must include a structural control measure (e.g. tracking pad or wash rack) and may include a non-structural control measure (e.g. sweeping or restricting vehicle traffic to paved areas). (b) Stormwater runoff from all disturbed areas and soil storage areas must utilize or flow to one or more control measures to minimize erosion or sediment in the discharge. The control measure(s) must be selected, designed, installed and adequately sized in accordance with good engineering, hydrologic and pollution control practices for the intended application. The control measure(s) must contain or filter flows in order to prevent the bypass of flows without treatment and must be appropriate for stormwater runoff from disturbed areas and for the expected flow rate, duration, and flow conditions (e.g. sheet or concentrated flow). (c) Selection of control measures should prioritize the use of control measures that minimize the potential for erosion (i.e. covering materials). Selection should also prioritize phasing construction activities to minimize the amount of soil disturbance at any point in time throughout the duration of construction. (d) Outlets that withdraw water from or near the surface must be installed when discharging from basins and impoundments, unless infeasible. (e) Maintain pre-existing vegetation for areas within 50 horizontal feet of receiving waters as defined by this permit, unless infeasible. In addition to maintaining 50 horizontal feet of pre-existing vegetation upgradient of a receiving water (unless infeasible), the permittee must install control measures upgradient of the vegetative buffer that meets the requirements of this section, Part I.B.1.a.i. (f) Soil compaction must be minimized for areas where infiltration control measures are implemented or where final stabilization will be achieved through vegetative cover. If compaction does occur in areas where final stabilization will be achieved through vegetative cover, then decompaction of the soil must be completed prior to planting. Page 8 of 31 Permit No. COR400000 (g) Unless infeasible, topsoil must be preserved for those areas of a site that will utilize vegetative final stabilization. Preserved topsoil can be left in place or stockpiled. (h) Minimize the amount of soil exposed during construction activity, including the disturbance of steep slopes. (i) Diversion control measures used for clean water diversions must minimize soil transport and erosion within the entire diversion, minimize erosion during discharge, and minimize run-on into the diversion. The permittee must minimize the discharge of pollutants throughout the installation, implementation and removal of the diversion. Diversions must meet one or more of the following conditions: (1) Lined or piped structures that result in no erosion for anticipated flow conditions. (2) Diversion channels, berms, and coffer dams must be lined or composed of a material that minimizes potential for soil loss in the entire wetted perimeter during anticipated flow conditions (e.g. vegetated swale, non-erosive soil substrate). The entire length of the diversion channel must be designed such that the maximum flow velocity for the type of material(s) exposed to the anticipated flows ensures the calculated maximum shear stress of flows in the channel is not expected to result in physical damage to the channel or liner nor result in discharge of pollutants. Additionally, the conditions relied on to minimize soil loss must be maintained for the projected life of the diversion (e.g. use of a vegetated swale must be limited to a period of time that ensures vegetative growth, minimizes erosion and maintains stable conditions). (3) An alternative diversion criteria, approved by the division prior to implementation. The diversion method must be designed to minimize the discharge of pollutants and to prevent the potential for pollution or degradation to state waters as a result of the diverted flow through the diversion structure. In addition, the alternative diversion method must minimize the discharge of pollutants throughout the installation, implementation and removal of the diversion. (j) Minimize dust. On areas of exposed soil, minimize dust through the appropriate application of water or other dust suppression techniques. Water application must be conducted in a manner to prevent discharge offsite unless authorized by a separate CDPS or NPDES permit. (k) Control stormwater discharges, including both peak flowrates and total stormwater volume, to minimize channel and streambank erosion and scour in the immediate vicinity of discharge points. Practices for Other Common Pollutants (a) Bulk storage (individual containers of 55 gallons or greater) for petroleum products and other liquid chemicals must have secondary containment, or equivalent protection, in order to contain spills and to prevent spilled material from entering state waters. (b) Spills and leaks must be minimized. Upon identification, spills and leaks must immediately be contained and mitigated per the spill prevention and response plan, as applicable (i.e. oil, grease, fluids associated with vehicle and equipment maintenance, toxic chemicals, hazardous substances, etc.). (c) Control measures designed for concrete washout waste, masonry operations, stucco waste, vehicle/equipment washing, and external building washdown must be implemented. This includes washout waste discharged to the ground as authorized under this permit and washout waste from concrete trucks and masonry operations contained on site. The permittee must ensure washing activities do not contribute pollutants to stormwater runoff, or receiving waters in accordance Part I.A.1.b.ii. Discharges that may reach groundwater must flow through soil that has buffering capacity prior to reaching groundwater, as necessary to meet the effluent limits in this permit, including Part I.B.3.a. The concrete or masonry washout location (including vehicle/equipment and external building washdown water, if applicable) must not be located in an area where shallow groundwater may be present and would result in buffering capacity not being adequate, such as near natural drainages, springs, or wetlands. This permit authorizes discharges to the ground of Page 9 of 31 Permit No. COR400000 concrete washout waste, but does not authorize on-site waste disposal per Part I.B.3.d. (d) In the event that water remains onsite and contains pollutants either from firefighting activities or picked up from the site (i.e. in a gutter, sediment basin, etc.) after active emergency response is complete, the permittee must ensure the remaining water containing pollutants is properly removed and disposed of in order to minimize pollutants from discharging from the site, unless infeasible. (e) Minimize the exposure of fertilizers, pesticides, and herbicides to stormwater during storage. Store and apply fertilizers, pesticides, and herbicides per manufacturer’s directions. (f) For washing applicators and containers used for paint, form release oils, curing compounds, or other similar construction materials, the wash water must be directed into a leak-proof container or leak-proof and lined pit designed so no discharges to groundwater occur or overflows occur due to inadequate sizing or precipitation. Liquid and hardened wastes must be appropriately disposed. Stabilization Requirements The following requirements must be implemented for each site. (a) Temporary stabilization must be implemented for earth disturbing activities on any portion of the site where ground disturbing construction activity has permanently ceased, or temporarily ceased for more than 14 calendar days. Temporary stabilization methods may include, but are not limited to, tarps, soil tackifier, and hydromulch. The permittee may exceed the 14-day schedule when either the function of the specific area of the site requires it to remain disturbed or physical characteristics of the terrain and climate prevent stabilization. The stormwater management plan must document the constraints necessitating the alternative schedule, provide the alternate stabilization schedule, and identify all locations where the alternative schedule is applicable on the site map. Minimum inspection frequency and scope, as directed in Part I.D., must be followed for temporarily stabilized areas. (b) Final stabilization must be implemented for all construction sites covered under this permit. Final stabilization is reached when the following are complete: (1) All construction activities are complete. (2) Permanent stabilization methods are complete. Permanent stabilization methods include, but are not limited to, permanent pavement or concrete, hardscape, xeriscape, stabilized driving surfaces and storage areas, vegetative cover, or equivalent permanent alternative stabilization methods. The division may approve alternative final stabilization criteria for specific operations. Vegetative cover must include the following criteria: Evenly distributed perennial vegetation, which may include trees and shrubs; Vegetation coverage, at a minimum, equal to 70 percent of what would have been provided by native vegetation in a local, undisturbed area or adequate reference site; and If applicable, adherence to stabilization requirements does not negate the permittee’s requirement to comply with the local jurisdiction’s plant species requirements. (c) Final stabilization must be designed and installed as a permanent feature. All control measures must be removed from the construction site, except when the control measure specifications allow the control measure to be left in place (i.e. bio-degradable control measures, permanent sedimentation basin, etc). Final stabilization measures for obtaining a vegetative cover or alternative stabilization methods include, but are not limited to, the following as appropriate: (1) Seed mix selection and application methods; (2) Soil preparation and amendments; (3) Soil stabilization methods to provide adequate protection to minimize erosion (e.g. crimped straw, hydro mulch or rolled erosion control products); (4) Appropriate sediment control measures as needed until final stabilization is achieved; Page 10 of 31 Permit No. COR400000 (5) Permanent pavement, hardscape, xeriscape, stabilized driving surfaces; (6) Conversion of construction site back to prior cropland use. The permittee is not required to plant the crop prior to termination; and (7) Other alternative stabilization practices as applicable. Routine Maintenance The permittee must ensure that all control measures remain in effective operating condition and are protected from activities that would reduce their effectiveness. Control measures must be routinely maintained in accordance with good engineering, hydrologic and pollution control practices. Observations leading to the required routine maintenance of control measures can be made during a site inspection, or during general observations of site conditions. The necessary repairs or modifications to a control measure requiring routine maintenance, as defined in Part I.E., must be conducted to maintain an effective operating condition. Control measures requiring routine maintenance are not subject to the requirements in Part I.B.1.c below. Corrective Actions The permittee must assess the adequacy of control measures at the construction site, and the need for changes to those control measures, to ensure continued effective performance. When an inadequate control measure, as defined in Part I.E., is identified, the following corrective action requirements apply. The permittee is not in compliance with the permit until the inadequate control measure is replaced or corrected and returned to effective operating condition in compliance with Part I.B.1 and the general requirements in Part I.B.3. If the inadequate control measure results in noncompliance that meets the conditions of Part II.L, the permittee must also meet the requirements of that section. The permittee must take all necessary steps to minimize or prevent the discharge of pollutants from the permitted area and manage any stormwater run-on onto the site until a control measure is implemented and made operational and/or an inadequate control measure is replaced or corrected and returned to effective operating condition. If it is infeasible to install or repair the control measure immediately after discovering the deficiency, the following must be documented in the stormwater management plan in Part I.D.5.c and kept on record in accordance with the recordkeeping requirements in Part II. (a) Describe why it is infeasible to initiate the installation or repair immediately; and (b) Provide a schedule for installing or repairing the control measure and returning it to an effective operating condition as soon as possible. If applicable, the permittee must remove and properly dispose of any unauthorized release or discharge within and from the permitted area (e.g., discharge of non-stormwater, untreated stormwater containing pollutants such as sediment, spill, or leak not authorized by this permit.) The permittee must clean up any contaminated surfaces, if feasible, to minimize discharges of the material in subsequent storm events, including water remaining from the response that contains pollutants after active emergency firefighting response is complete. Permittees are prohibited from hosing down an area to clean surface spills or leaks unless the wash water is adequately captured to not discharge off the site or to land and the captured water is properly disposed. In addition, the permittee must mitigate any accumulation of sediment outside of the site boundaries. Total Maximum Daily Load (TMDL) If the discharge from the site of permit coverage flows to or could reasonably be expected to flow to any water body for which a TMDL has been approved, and stormwater discharges associated with construction activity were assigned a pollutant-specific Wasteload Allocation (WLA) under the TMDL, the division may: Ensure the WLA is implemented properly through alternative local requirements, such as by a municipal stormwater permit; or Page 11 of 31 Permit No. COR400000 Notify the permittee of the WLA and amend the permittee’s certification to add specific effluent limits, other requirements, and compliance schedules, as necessary and appropriate. The permittee may be required to do the following: (a) Under the permittee’s stormwater management plan, implement specific control measures based on requirements of the WLA, and evaluate whether the requirements are met through implementation of existing stormwater control measures or if additional control measures are necessary. Document the calculations or other evidence demonstrating that the requirements are expected to be met; and (b) If the evaluation shows that additional or modified control measures are necessary, describe the type and schedule for the control measure additions or modifications. Discharge monitoring may also be required. The permittee may maintain coverage under the general permit provided they comply with the applicable requirements outlined above. Outstanding Waters Discharges to outstanding waters must be short-term and have a long-term ecological or water quality benefit or clear public interest. A state outstanding waters map can be found here. Sites that discharge to outstanding waters are required to have an increased inspection frequency found in Part I.D.3. The division may require individual or alternate general permit coverage per Part I.A.3.d.i. Discharges authorized by this permit must not cause, have the reasonable potential to cause, or measurably contribute to an exceedance of any applicable water quality standard, including narrative standards for water quality. The division may require sampling and testing, on a case-by-case basis, in the event that there is reason to suspect that the stormwater management plan is not adequately minimizing pollutants in stormwater or in order to measure the effectiveness of the control measures in removing pollutants in the effluent. Such monitoring may include Whole Effluent Toxicity testing. The permittee must comply with the lawful requirements of federal agencies, municipalities, counties, drainage districts and other local agencies including applicable requirements in Municipal Stormwater Management Programs developed to comply with CDPS permits. The permittee must comply with local stormwater management requirements, policies and guidelines including those for erosion and sediment control. The division may include additional requirements as specified in the applicable watershed protection Control Regulations 71-74. All construction site wastes must be properly managed to prevent potential pollution of state waters. This permit does not authorize on-site waste disposal. This permit does not relieve the permittee of the reporting requirements in 40 CFR 110, 40 CFR 117 or 40 CFR 302. Any discharge of hazardous material must be handled in accordance with the division's Noncompliance Notification Requirements (see Part II.L of the permit). STORMWATER MANAGEMENT PLAN REQUIREMENTS The permittee must develop, implement, and maintain a stormwater management plan for each construction site listed under Part I.A.3.a, including, but not limited to, construction activity that will disturb one acre or more and/or are part of a common plan of development or sale covered by this permit. The plan must be prepared in accordance with good engineering, hydrologic and pollution control practices. Page 12 of 31 Permit No. COR400000 For public emergency related sites, the plan must be created no later than 14 days after the commencement of construction activities. The permittee must implement the provisions of the plan as written and updated, from commencement of construction activity until final stabilization is complete. The division may review the plan. A copy of the plan must be retained onsite or be onsite when construction activities are occurring at the site unless the permittee specifies another location and obtains written approval from the division. The plan and inspection reports may be prepared, signed, and kept electronically, rather than in paper form, if the records are: In a format that can be read in a similar manner as a paper record; and Immediately accessible to the inspector during an inspection to the same extent as a paper copy stored at the site would be. The stormwater management plan, at a minimum, must include the following elements. Qualified Stormwater Manager. The plan must list individual(s) by title and name who are designated as responsible for implementing the stormwater management plan in its entirety and meet the definition of a Qualified Stormwater Manager. This role may be filled by more than one individual. Other Permits. The plan must list the applicable CDPS permits and low-risk discharge guidance documents associated with the permitted site (including the COR400000 general permit and the certification associated with the site) and the activities occurring on the permitted site (e.g. a CDPS Dewatering Permit). The plan must also list applicable US Army Corps of Engineers Section 404 permits. A copy of this general permit, applicable permit certification, and any applicable low-risk discharge guidance documents must be included in the stormwater management plan for each construction site. Site Description. The plan must include a site description which includes, at a minimum, the following: The nature of the construction activity at the site, including if it is a public emergency related site; The proposed schedule for the sequence for major construction activities and the planned implementation of control measures for each phase. (e.g. clearing, grading, utilities, vertical, etc.); Estimates of the total acreage of the site, and the acreage expected to be disturbed by clearing, excavation, grading, or any other construction activities; A summary of any existing data and sources used in the development of the construction site plans or stormwater management plan that describe the soil types found in the permitted area and the erodibility of the identified soil types; A description of the percent cover from native vegetation on the site if the site is undisturbed, or the percent cover from native vegetation in a similar, local undisturbed area or adequate reference area if the site is disturbed. Include the source or methodology for determining the percentage. If a percent cover is not appropriate for the site location (i.e. arid), describe the technique and justification for the identified cover of native vegetation; A description of any allowable non-stormwater discharges at the site, including those being discharged under a separate CDPS permit, discharges under Part I.A.1.b, or a division low risk discharge guidance, and applicable control measures installed; A description of the general flow direction and where or how the discharge leaves the site, including a description of the immediate conveyance or area receiving the discharge and the receiving water(s) of the discharge, if different than the immediate conveyance or area. If the stormwater discharge is to a municipal separate storm sewer system, include the name of the entity owning that system, the location(s) of the stormwater discharge, and the receiving water(s); A description of all stream crossings located within the construction site boundary, if applicable; A description of the alternate temporary stabilization schedule, if applicable (Part I.B.1.a.iii(a); and Page 13 of 31 Permit No. COR400000 A description of the alternative diversion criteria as approved by the division, if applicable (Part I.B.1.a.i(i)(3)). A description of any effluent limitations that the permittees determines are infeasible and why they are infeasible, if applicable (Part I.B.1.a.i.(d, e, and g) and I.B.1.a.ii.(d). Site Map. The plan must include a site map which includes, at a minimum, the following: Construction site boundaries; Flow arrows that depict stormwater flow directions on and off-site; All areas of ground disturbance including areas of borrow and fill; Areas used for storage of soil; Locations of all waste accumulation areas, including areas for liquid, concrete, masonry, and asphalt; Locations of dedicated asphalt, concrete batch plants and masonry mixing stations; Locations of other potential sources of pollution not listed in iii. through vi. Locations of all structural control measures; Locations of all non-structural control measures (e.g. temporary stabilization); Locations and names, as listed in Part I.C.2.c.vii, of springs, streams, wetlands, diversions and other state waters within or bordering the site, including areas that require pre-existing vegetation be maintained within 50 feet of a receiving water, where determined feasible in accordance with Part I.B.1.a.i(e) (e.g. MS4 to unnamed tributary to the South Platte River); Locations of all stream crossings located within the construction site boundary; Locations where alternative temporary stabilization schedules apply; and Potential Sources of Pollution. The plan must list all potential sources of pollution which may reasonably be expected to affect the quality of stormwater discharges associated with construction activity from the site. The plan must include the following pollutant sources as these pollutants relate to every construction site: (a) Disturbed and stored soils; (b) Vehicle tracking of sediments; (c) On-site waste management practices (waste piles, liquid wastes, dumpsters); The plan may include, but is not limited to, the following pollutant sources: (a) Management of contaminated soils (contaminated soils may also occur from onsite spills or leaks), if known to be present, or if contaminated soils are found during construction; (b) Loading and unloading operations; (c) Outdoor storage activities (erodible building materials, fertilizers, chemicals, etc.); (d) Vehicle and equipment maintenance and fueling; (e) Significant dust or particulate generating processes (e.g., saw cutting material, including dust); (f) Routine maintenance activities involving fertilizers, pesticides, herbicides, detergents, fuels, solvents, oils, etc.; (g) Concrete/masonry truck/equipment washing, including washing of the concrete truck chute and associated fixtures and equipment; (h) Dedicated asphalt, concrete batch plants and masonry mixing stations; (i) Non-industrial waste sources such as worker trash and portable toilets; and Page 14 of 31 Permit No. COR400000 (j) Reclaimed water approved for use in construction dust suppression. Materials Handling. The plan must describe handling procedures of all control measures implemented at the site to minimize impacts from handling significant materials that could contribute pollutants to runoff. These handling procedures can include control measures for pollutants and activities such as, exposed storage of building materials, paints and solvents, landscape materials, fertilizers or chemicals, sanitary waste material, trash and equipment maintenance or fueling procedures. Spill Prevention and Response Plan. The plan must have a spill prevention and response plan. The plan may incorporate by reference any part of a Spill Prevention Control and Countermeasure (SPCC) plan under section 311 of the Clean Water Act (CWA) or a Spill Prevention Plan required by a separate CDPS permit. The relevant sections of any referenced plans must be available as part of the stormwater management plan consistent with Part I.C.4. Implementation of Control Measures. The plan must include design specifications that contain information on the implementation of all the control measures in use on the site in accordance with good engineering, hydrologic and pollution control practices; including, as applicable, drawings, dimensions, installation information, materials, implementation processes, control measure-specific inspection expectations, and maintenance requirements. The plan must include a documented use agreement between the permittee and the owner or operator of any control measures located outside of the permitted area that are utilized by the permittee’s construction site for compliance with this permit, but not under the direct control of the permittee. The permittee is responsible for ensuring that all control measures located outside of their permitted area, that are being utilized by the permittee’s construction site, are properly maintained and in compliance with all terms and conditions of the permit. The plan must include all information required of and relevant to any such control measures located outside the permitted area, including location, installation specifications, design specifications and maintenance requirements. Temporary Stabilization, Final Stabilization and Long Term Stormwater Management. The plan must document the constraints necessitating an alternative temporary stabilization schedule, as referenced in Part I.B.1.a.iii(a), provide the alternate stabilization schedule, and identify all locations where the alternative schedule is applicable on the site map. The plan must document all residential lots that utilize the Sale of Residence to Homeowner, as referenced in Part I.A.3.i, the lots that received temporary stabilization and meet all the requirements under Part I.A.3.i, and identify all the lot locations where Part I.A.3.i is applicable on the site map. The plan must describe or locate where all final stabilization methods are used and what methods are used to achieve final stabilization of all disturbed areas at the site (e.g. pavement, vegetative cover, etc), as listed in Part I.B.1.a.iii(b). The plan must describe how the permittee will establish final stabilization through vegetative cover or alternative stabilization method, as referenced in Part I.B.1.a.iii(c), and describe and locate any temporary control measures in place during the process of final stabilization (e.g. seed mix, soil amendments, final stabilization methods, return to cropland, etc.). The plan must describe and locate any planned permanent control measures to control pollutants in stormwater discharges that will occur after construction operations are completed, including but not limited to, detention/retention ponds, rain gardens, stormwater vaults, etc. Inspection Reports. The plan must include documented inspection reports in accordance with Part I.D.5.c. Permittees must keep the stormwater management plan current and maintain a record of changes made that includes the date and identification of the changes. The plan must be amended when the following occurs: Page 15 of 31 Permit No. COR400000 A change in design, construction, operation, or maintenance of the site requiring implementation of new or revised control measures; The plan proves ineffective in controlling pollutants in stormwater runoff in compliance with the permit conditions; Control measures identified in the plan are no longer necessary and are removed; Corrective actions are taken onsite that result in a change to the plan; and The site or areas of the site qualifying for reduced frequency inspections under Part I.D.4. For stormwater management plan revisions made prior to or following a change(s) onsite, including revisions to sections addressing site conditions and control measures, a notation must be included in the plan that identifies the date of the site change, the control measure removed, or modified, the location(s) of those control measures, and any changes to the control measure(s). The methods for notation may include notations on site maps, a log of changes, redline changes in the, or other measures. The permittee must ensure the site changes are reflected in the plan. The permittee is noncompliant with the permit until the plan revisions have been made. A copy of the stormwater management plan must be provided upon request to the division, EPA, and any local agency with authority for approving sediment and erosion plans, grading plans or stormwater management plans within the time frame specified in the request. If the plan is required to be submitted to any of these entities, the submission must include a signed certification in accordance with Part I.A.3.e, certifying that the plan is complete and compliant with all terms and conditions of the permit. All stormwater management plans required under this permit are considered reports that must be available to the public under Section 308(b) of the CWA and Section 61.5(4) of the CDPS regulations. The permittee must make plans available to members of the public upon request. However, the permittee may claim any portion of a stormwater management plan as confidential in accordance with 40 CFR Part 2. SITE INSPECTIONS Site inspections must be conducted in accordance with the following requirements. The required inspection schedules are a minimum frequency and do not affect the permittee’s responsibility to implement control measures in effective operating condition as prescribed in the stormwater management plan, Part I.C.2.a.vi, as proper maintenance of control measures may require more frequent inspections. Site inspections must start within 7 calendar days of the commencement of construction activities on site. The person(s) inspecting the site may be on the permittee’s staff or a third party hired to conduct stormwater inspections under the direction of the permittee(s). The permittee is responsible for ensuring that the inspector meets the definition of a Qualified Stormwater Manager. The inspector may be different than the individual(s) listed in Part I.C.2.a. Permittees must conduct site inspections in accordance with one of the following minimum frequencies, unless the site meets the requirements of Part I.D.3. All inspections must be recorded per Part I.D.5.c. At least one inspection every 7 calendar days; or At least one inspection every 14 calendar days, if post-storm event inspections are conducted within 24 hours after the end of any precipitation or snowmelt event that causes surface erosion. Post-storm inspections may be used to fulfill the 14-day routine inspection requirement. When site conditions make the schedule required in this section impractical, the permittee may petition the division to grant an alternate inspection schedule. The alternative inspection schedule must not be implemented prior to written approval by the division and incorporation into the stormwater management plan. Page 16 of 31 Permit No. COR400000 Permittees must conduct site inspections at least once every 7 calendar days for sites that discharge to a water body designated as an Outstanding Water by the Water Quality Control Commission. In order to determine if the immediate receiving water is to an Outstanding Water, the permittee can use this map of Outstanding Waters. The permittee may perform site inspections at the following reduced frequencies when one of the following conditions exists: Post-Storm Inspections at Temporarily Idle Sites For permittees choosing an inspection frequency pursuant to Part I.D.2.b and if no construction activities will occur following a storm event, post-storm event inspections must be conducted prior to re- commencing construction activities, and no later than 72 hours after the end of any precipitation or snowmelt event that causes surface erosion. If the post-storm event inspection qualifies under this section, the inspection delay must be documented in the inspection record per Part I.D.5.c. Routine inspections must still be conducted at least every 14 calendar days. Inspections at Sites Awaiting Final Stabilization When the site, or portions of a site, are awaiting establishment of a vegetative ground cover and final stabilization, the permittee must conduct a thorough inspection of the construction site and control measures at least once every 30 days. Post-storm event inspections are not required under this schedule. This reduced inspection schedule is allowed if all of the following criteria are met: All construction activities resulting in ground disturbance are complete; All activities required for final stabilization, in accordance with Part I.B.1.a.iii(b) & (c) and with the stormwater management plan, have been completed, with the exception of the application of sod or seed that has not occurred due to seasonal conditions or the necessity for additional seed application to augment previous efforts; and The stormwater management plan has been amended to locate those areas to be inspected in accordance with the reduced schedule allowed for in this paragraph. Winter Conditions Inspections Exclusion Typically, this exclusion applies to elevations or locations where snow melt does not occur in the winter months. Inspections are not required for sites that meet all of the following conditions: Construction activities are temporarily halted for the winter season (e.g. December – February due to site being inaccessible); Snow cover exists over the entire site for an extended period (i.e. high-elevation winter season); and Melting conditions posing a risk of surface erosion do not exist. This inspection exception is applicable only during the period where melting conditions do not exist, and applies to the routine 7-day, 14-day and monthly inspections, as well as the post-storm-event inspections. When this inspection exclusion is implemented, the following information must be documented in accordance with the requirements in Part I.C.3 and Part I.D.5.c: (a) Dates when snow cover existed; (b) Date when construction activities ceased; and (c) Date melting conditions began. Areas to Be Inspected When conducting a site inspection the following areas, if applicable, must be inspected for evidence of, or Page 17 of 31 Permit No. COR400000 the potential for, pollutants leaving the construction site boundaries, entering the stormwater drainage system, or discharging to state waters: Construction site perimeter; All disturbed areas, including areas that are temporarily stabilized; Locations of installed control measures; Designated haul routes; Material and waste storage areas exposed to precipitation; Locations of pumped stormwater; Locations where stormwater has the potential to discharge offsite, including visible erosion and sedimentation; and Locations where vehicles exit the site. Inspection Requirements Inspections must assess the following components: Visually verify whether all implemented control measures are in effective operational condition and are working as designed in their specifications to minimize pollutant discharges. (a) For pumped stormwater, assessment may include sediment plume, suspended solids, unusual color, decreased clarity, presence of odor or foam, etc. Determine if there are new potential sources of pollutants. Assess the adequacy of control measures at the site to identify areas requiring new or modified control measures to minimize pollutant discharges. Identify all areas of non–compliance with the permit requirements and, if necessary, implement corrective action(s) in accordance with Part I.B.1.c. Inspection Reports The permittee must keep a record of all inspections conducted for each permitted site. Inspection reports must identify any incidents of noncompliance with the terms and conditions of this permit. All inspection reports must be signed and dated in accordance with Part I.D.5.c.xiii and xiv below. Inspection records must be retained in accordance with Part II.J. At a minimum, the inspection report must include: The inspection date; Name(s) and title(s) of personnel conducting the inspection; Weather conditions at the time of inspection; Phase of construction at the time of inspection; Estimated acreage of disturbance at the time of inspection; Location(s) and identification of control measures requiring routine maintenance; Location(s) and identification of discharges of sediment or other pollutants from the site; Location(s) and identification of inadequate control measures; Location(s) and identification of additional control measures needed that were not in place at the time of inspection; Description of corrective action(s) for items vii, viii, ix, above, dates corrective action(s) were completed, including requisite changes to the stormwater management plan, as necessary; Description of the minimum inspection frequency (either in accordance with Part I.D.2, Part I.D.3 or Part I.D.4.) utilized when conducting each inspection; Page 18 of 31 Permit No. COR400000 Deviations from the minimum inspection schedule as required in Part I.D.2. This would include documentation of division approval for an alternate inspection schedule outlined in Part I.D.2.c; After adequate corrective action(s) have been taken, or where a report does not identify any incidents requiring corrective action, the report must contain the following statement and provide the date of the statement: “I verify that, to the best of my knowledge and belief, that if any corrective action items were identified during the inspection, those corrective actions are complete, and the site is currently in compliance with the permit.”; and Inspection reports must be signed by the individual(s) designated as a Qualified Stormwater Manager, as defined in Part I.E. DEFINITIONS For the purposes of this permit: (1) Bypass the intentional diversion of waste streams from any portion of a treatment facility in accordance with 40 CFR 122.41(m)(1)(i) and Regulation 61.2(12). (2) Common Plan of Development or Sale - A contiguous area where multiple separate and distinct construction activities may be taking place at different times on different schedules, but remain related. The division has determined that “contiguous” means construction activities located in close proximity to each other (within ¼ mile). Construction activities are considered to be “related” if they share the same development plan, builder or contractor, equipment, storage areas, etc. “Common plan of development or sale” includes construction activities that are associated with the construction of field wide oil and gas permits for facilities that are related. (3) Construction Activity - Ground surface disturbing and associated activities (land disturbance), which include, but are not limited to, clearing, grading, excavation, demolition, installation of new or improved haul roads and access roads, staging areas, stockpiling of fill materials, and borrow areas. Construction does not include routine maintenance to maintain the original line and grade, hydraulic capacity, or original purpose of the facility. Activities to conduct repairs that are not part of routine maintenance or for replacement are construction activities and are not routine maintenance. Repaving activities where underlying and/or surrounding soil is exposed as part of the repaving operation are considered construction activities. Construction activity is from initial ground breaking to final stabilization regardless of ownership of the construction activities. (4) Construction Site – The location where construction activity is occurring and associated discharges are covered by this permit, including offsite locations for storage, staging, etc. For use in this permit, the terms construction site, site, and facility are used interchangeably. (5) Control Measure - Any best management practice or other method used to prevent or reduce the discharge of pollutants to state waters. Control measures include, but are not limited to, best management practices. Control measures can include other methods such as the installation, operation, and maintenance of structural controls and treatment devices. (6) Control Measure Requiring Routine Maintenance - Any control measure that is still operating in accordance with its design and the requirements of this permit, but requires preventative maintenance to prevent a breach of the control measure in subsequent storms. (7) Dedicated Asphalt, Concrete Batch Plants and Masonry Mixing Stations – Are batch plants or mixing stations located on, or within ¼ mile of, a construction site and that provide materials only to that specific construction site. (8) Disturbed area – Any ground disturbance prior to final stabilization. (9) Diversion – Discharges of state waters that are temporarily routed through channels or structures (e.g. in- stream, uncontaminated springs, non-pumped groundwater, temporary rerouting of surface waters, fords). For purposes of this permit, these diversions can also be referred to as clean water diversions. Page 19 of 31 Permit No. COR400000 (10) Final Stabilization - The condition reached when construction activities at the site have been completed, permanent stabilization methods are complete, and temporary control measures are removed. Areas being stabilized with a vegetative cover must have evenly distributed perennial vegetation. The vegetation coverage must be, at a minimum, equal to 70 percent of what would have been provided by native vegetation in a local, undisturbed area or adequate reference site. (11) Good Engineering, Hydrologic and Pollution Control Practices: are methods, procedures, and practices that: a. Are based on basic scientific fact(s). b. Reflect best industry practices and standards. c. Are appropriate for the conditions and pollutant sources. d. Provide appropriate solutions to meet the associated permit requirements, including practice based effluent limits. (12) Inadequate Control Measure - Any control measure that is not designed or implemented in accordance with the requirements of the permit and/or any control measure that is not implemented to operate in accordance with its design. (13) Infeasible – Not technologically possible, or not economically practicable and achievable in light of best industry practices. (14) Minimize - Reduce or eliminate to the extent achievable using control measures that are technologically available and economically practicable and achievable in light of best industry practice. (15) Municipality - A city, town, county, district, association, or other public body created by, or under, State law and having jurisdiction over disposal of sewage, industrial wastes, or other wastes, or a designated and approved management agency under section 208 of CWA (1987). (16) Municipal Separate Storm Sewer System (MS4) - A conveyance or system of conveyances (including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, man-made channels, or storm drains): a. Owned or operated by a State, city, town, county, district, association, or other public body (created by or pursuant to State law) having jurisdiction over disposal of sewage, industrial wastes, stormwater, or other wastes, including special districts under State law such as a sewer district, flood control district or drainage district, or similar entity, or a designated and approved management agency under section 208 of the CWA that discharges to state waters; b. Designed or used for collecting or conveying stormwater; c. Are not a combined sewer; and d. Are not part of a Publicly Owned Treatment Works (POTW). See 5 CCR 1002-61.2(62). (17) Municipal Stormwater Management Program - A stormwater program operated by a municipality, typically to meet the requirements of the municipality’s MS4 discharge certification. (18) Native Vegetation – Plant species that are naturally occurring for the particular area (or region) and have adapted to and are well suited for the soil, temperature, nutrients, and precipitation of the particular area (region). (19) Operator - The party that has operational control over day-to-day activities at a project site which are necessary to ensure compliance with the permit. This party is authorized to direct individuals at a site to carry out activities required by the permit (i.e. the general contractor). (20) Outstanding Waters - Waters designated as outstanding waters pursuant to Regulation 31, Section 31.8(2)(a). The highest level of water quality protection applies to certain waters that constitute an outstanding state or national resource. (21) Owner - The party that has overall control of the activities and that has funded the implementation of the construction plans and specifications. This is the party that may have ownership of, a long term lease of, or easements on the property on which the construction activity is occurring (e.g. the developer). Page 20 of 31 Permit No. COR400000 (22) Permittee(s) - The owner and operator named in the discharge certification issued under this general permit for the construction site specified in the certification. (23) Point Source - Any discernible, confined, and discrete conveyance, including, but not limited to, any pipe, ditch, channel, tunnel, conduit, well, discrete fissure, container, rolling stock, concentrated animal feeding operation, or vessel or other floating craft, from which pollutants are or may be discharged. Point source does not include irrigation return flow. See 5 CCR 102-61.2(75). (24) Pollutant - Dredged spoil, dirt, slurry, solid waste, incinerator residue, sewage, sewage sludge, garbage, trash, chemical waste, biological nutrient, biological material, radioactive material, heat, wrecked or discarded equipment, rock, sand, or any industrial, municipal or agricultural waste. See 5 CCR 1002- 61.2(76). (25) Presentation of credentials – A government issued form of identification, if in person; or (ii) providing name, position and purpose of inspection if request to enter is made via telephone, email or other form of electronic communication. A permittee’s non-response to a request to enter upon presentation of credentials constitutes a denial to such request, and may result in violation of the permit. (26) Process Water - Any water which, during manufacturing or processing, comes into contact with or results from the production of any raw material, intermediate product, finished product, by product or waste product. (27) Public Emergency Related Site - A project initiated in response to an unanticipated emergency (e.g., mud slides, earthquake, extreme flooding conditions, disruption in essential public services), for which the related work requires immediate authorization to avoid imminent endangerment to human health or the environment, or to reestablish essential public services. (28) Qualified Stormwater Manager - An individual knowledgeable in the principles and practices of erosion and sediment control and pollution prevention, and with the skills to assess conditions at construction sites that could impact stormwater quality and to assess the effectiveness of stormwater control measures implemented to meet the requirements of this permit. (29) Qualifying Local Program - A municipal program for stormwater discharges associated with small construction activity that was formally approved by the division as a qualifying local program (Regulation 61.8(12). (30) Receiving Water - Any surface state water into which stormwater associated with construction activities discharges. Examples include all water courses, even if they are usually dry, such as borrow ditches, arroyos, and other unnamed waterways. (31) Severe Property Damage - Substantial physical damage to property, damage to the treatment facilities which causes them to become inoperable, or substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production. See 40 CFR 122.41(m)(1)(ii). (32) Significant Materials - Include, but not limited to, raw materials; fuels; materials such as solvents, detergents, and plastic pellets; finished materials such as metallic products; raw materials used in food processing or production; hazardous substances designated under section 101(14) of CERCLA; any chemical the permittee is required to report under section 313 of Title III of the Superfund Amendments and Reauthorization Act (SARA); fertilizers; pesticides; and waste products such as ashes, slag and sludge that have the potential to be released with stormwater discharges. (33) Small Construction Activity - The discharge of stormwater from construction activities that result in land disturbance of equal to, or greater than, one acre and less than five acres. Small construction activity also includes the disturbance of less than one acre of total land area that is part of a larger common plan of development or sale, if the larger common plan ultimately disturbs equal to, or greater than, one acre and less than five acres. (34) Spill - An unintentional release of solid or liquid material which may pollute state waters. (35) State Waters - Any and all surface and subsurface waters which are contained in or flow in or through this state, but does not include waters in sewage systems, waters in treatment works of disposal systems, waters in potable water distribution systems, and all water withdrawn for use until use and treatment have been Page 21 of 31 Permit No. COR400000 completed. (36) Steep Slopes - Where a local government, or industry technical manual (e.g. stormwater BMP manual) has defined what is to be considered a “steep slope”, this permit’s definition automatically adopts that definition. Where no such definition exists, steep slopes are automatically defined as those that are 3:1 or greater. (37) Stormwater - Precipitation runoff, snow melt runoff, and surface runoff and drainage. See 5 CCR 1002- 61.2(103). (38) Total Maximum Daily Loads (TMDLs) - The sum of the individual wasteload allocations (WLA) for point sources and load allocations (LA) for nonpoint sources and natural background. For the purposes of this permit, a TMDL is a calculation of the maximum amount of a pollutant that a waterbody can receive and still meet water quality standards, and an allocation of that amount to the pollutant's sources. A TMDL includes WLAs, LAs, and must include a margin of safety (MOS), and account for seasonal variations. See section 303(d) of the CWA and 40 C.F.R. 130.2 and 130.7. (39) Upset - An exceptional incident in which there is unintentional and temporary noncompliance with permit effluent limitations because of factors beyond the reasonable control of the permittee. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventative maintenance, or careless or improper operation in accordance with 40 CFR 122.41(n) and Regulation 61.2(114). MONITORING The division may require sampling and testing, on a case-by-case basis. If the division requires sampling and testing, the division will send a notification to the permittee. Sampling and reporting procedures for any monitoring data collected will be included in the notification. If monitoring is required, the following applies: The thirty (30) day average must be determined by the arithmetic mean of all samples collected during a thirty (30) consecutive-day period; and A grab sample, for monitoring requirements, is a single “dip and take” sample. OIL AND GAS CONSTRUCTION Stormwater discharges associated with construction activities directly related to oil and gas exploration, production, processing, and treatment operations or transmission facilities are regulated under the Colorado Discharge Permit System Regulations (5 CCR 1002-61), and require coverage under this permit in accordance with that regulation. However, references in this permit to specific authority under the CWA do not apply to stormwater discharges associated with these oil and gas related construction activities, to the extent that the references are limited by the federal Energy Policy Act of 2005. Page 22 of 31 Permit No. COR400000 PART II Part II contains standard conditions required by federal regulation to be included in all NPDES permits (see 40 C.F.R. 122.41). Part I contains permit specific requirements. DUTY TO COMPLY 1. The permittee must comply with all conditions of this permit. Any permit noncompliance constitutes a violation of the Colorado Water Quality Control Act and is grounds for: 1) enforcement action; 2) permit termination, revocation and reissuance, or modification; or 3) denial of a permit renewal application. 2. Federal Enforcement: a. The permittee shall comply with effluent standards or prohibitions established under section 307(a) of the Clean Water Act for toxic pollutants and with standards for sewage sludge use or disposal (see 40 CFR 122.2) established under section 405(d) of the CWA within the time provided in the regulations that establish these standards or prohibitions or standards for sewage sludge use or disposal, even if the permit has not yet been modified to incorporate the requirement. b. The Clean Water Act provides that any person who violates section 301, 302, 306, 307, 308, 318 or 405 of the Act, or any permit condition or limitation implementing any such sections in a permit issued under section 402, or any requirement imposed in a pretreatment program approved under sections 402(a)(3) or 402(b)(8) of the Act, is subject to a civil penalty not to exceed $25,000 per day for each violation. The Clean Water Act provides that any person who negligently violates sections 301, 302, 306, 307, 308, 318, or 405 of the Act, or any condition or limitation implementing any of such sections in a permit issued under section 402 of the Act, or any requirement imposed in a pretreatment program approved under section 402(a)(3) or 402(b)(8) of the Act, is subject to criminal penalties of $2,500 to $25,000 per day of violation, or imprisonment of not more than 1 year, or both. In the case of a second or subsequent conviction for a negligent violation, a person shall be subject to criminal penalties of not more than $50,000 per day of violation, or by imprisonment of not more than 2 years, or both. Any person who knowingly violates such sections, or such conditions or limitations is subject to criminal penalties of $5,000 to $50,000 per day of violation, or imprisonment for not more than 3 years, or both. In the case of a second or subsequent conviction for a knowing violation, a person shall be subject to criminal penalties of not more than $100,000 per day of violation, or imprisonment of not more than 6 years, or both. Any person who knowingly violates section 301, 302, 303, 306, 307, 308, 318 or 405 of the Act, or any permit condition or limitation implementing any of such sections in a permit issued under section 402 of the Act, and who knows at that time that he thereby places another person in imminent danger of death or serious bodily injury, shall, upon conviction, be subject to a fine of not more than $250,000 or imprisonment of not more than 15 years, or both. In the case of a second or subsequent conviction for a knowing endangerment violation, a person shall be subject to a fine of not more than $500,000 or by imprisonment of not more than 30 years, or both. An organization, as defined in section 309(c)(3)(B)(iii) of the CWA, shall, upon conviction of violating the imminent danger provision, be subject to a fine of not more than $1,000,000 and can be fined up to $2,000,000 for second or subsequent convictions. c. Any person may be assessed an administrative penalty by the Administrator for violating section 301, 302, 306, 307, 308, 318 or 405 of this Act, or any permit condition or limitation implementing any of such sections in a permit issued under section 402 of this Act. Administrative penalties for Class I violations are not to exceed $10,000 per violation, with the maximum amount of any Class I penalty assessed not to exceed $25,000. Penalties for Class II violations are not to exceed $10,000 per day for each day during which the violation continues, with the maximum amount of any Class II penalty not to exceed $125,000. DUTY TO REAPPLY If the permittee plans to continue an activity regulated by this permit after the expiration date of this permit, the permittee must submit a permit application at least 180 days before this permit expires as required by Regulations 61.4 and 61.10. NEED TO HALT OR REDUCE ACTIVITY NOT A DEFENSE It shall not be a defense for a permittee in an enforcement action that it would have been necessary to halt or Page 23 of 31 Permit No. COR400000 reduce the permitted activity in order to maintain compliance with the conditions of this permit. DUTY TO MITIGATE The permittee must take all reasonable steps to minimize or prevent any discharge or sludge use or disposal in violation of this permit which has a reasonable likelihood of adversely affecting human health or the environment. PROPER OPERATION AND MAINTENANCE The permittee must at all times properly operate and maintain all facilities and systems of treatment and control (and related appurtenances) that are installed or used by the permittee to achieve compliance with the conditions of this permit. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures. This provision requires the operation of backup or auxiliary facilities or similar systems which are installed by a permittee only when the operation is necessary to achieve compliance with the conditions of this permit. See 40 C.F.R. §122.41(e). PERMIT ACTIONS This permit may be modified, revoked and reissued, or terminated for cause. The filing of a request for a permit modification, revocation and reissuance, or termination, or a notification of planned changes or anticipated noncompliance does not stay any permit condition. Any request for modification, revocation, reissuance, or termination under this permit must comply with all terms and conditions of Regulation 61.8(8). See also 40 C.F.R. § 122.41(f). PROPERTY RIGHTS In accordance with 40 CFR §122.41(g) and Regulation 61.8(9): The issuance of a permit does not convey any property or water rights in either real or personal property, or stream flows or any exclusive privilege. 1. The issuance of a permit does not authorize any injury to person or property or any invasion of personal rights, nor does it authorize the infringement of federal, state, or local laws or regulations. 2. Except for any toxic effluent standard or prohibition imposed under Section 307 of the Clean Water Act or any standard for sewage sludge use or disposal under Section 405(d) of the Federal act, compliance with a permit during its term constitutes compliance, for purposes of enforcement, with Sections 301, 302, 306, 318, 403, and 405(a) and (b) of the Clean Water Act. However, a permit may be modified, revoked and reissued, or terminated during its term for cause as set forth in Section 61.8(8) of the Colorado Discharge Permit System Regulations. See 61.8(9)(c). DUTY TO PROVIDE INFORMATION The permittee shall furnish to the Division, within a reasonable time, any information which the Division may request to determine whether cause exists for modifying, revoking and reissuing, or terminating this permit, or to determine compliance with this permit. The permittee shall also furnish to the Division, upon request, copies of records required to be kept by this permit in accordance with 40 C.F.R. §122.41(h) and/or Regulation 61.8(3)(q). INSPECTION AND ENTRY The permittee shall allow the Division and the authorized representative, including U.S. EPA, and/or their authorized representatives (including an authorized contractor acting as their representative), upon the presentation of credentials as required by law, to conduct inspections in accordance with 40 C.F.R. §122.41(i), Regulation 61.8(3), and Regulation 61.8(4): 1. To enter upon the permittee's premises where a regulated facility or activity is located or conducted in which any records are required to be kept under the terms and conditions of this permit; 2. At reasonable times to have access to and copy any records required to be kept under the terms and conditions of this permit and to inspect any facilities, equipment (including monitoring and control equipment), practices, operations or monitoring method regulated or required in the permit; 3. To enter upon the permittee's premises in a reasonable manner and at a reasonable time to inspect or investigate, any actual, suspected, or potential source of water pollution, or to ascertain compliance or noncompliance with the Colorado Water Quality Control Act or any other applicable state or federal statute or regulation or any order promulgated by the Division, and; Page 24 of 31 Permit No. COR400000 4. Sample or monitor at reasonable times, for the purposes of assuring permit compliance or as otherwise authorized by the Clean Water Act, any substances or parameters at any location. MONITORING AND RECORDS 1. Samples and measurements taken for the purpose of monitoring must be representative of the volume and nature of the monitored activity. See 40 C.F.R. § 122.41(j)(1). 2. Monitoring must be conducted according to test procedures approved under 40 C.F.R. part 136 for the analyses of pollutants unless another method is required under 40 C.F.R. subchapters N or O. In the case of pollutants for which there are no approved methods under 40 C.F.R. part 136 or otherwise required under 40 C.F.R. subchapters N or O, monitoring must be conducted according to a test procedure specified in this permit for such pollutants. See 40 C.F.R. § 122.41(j)(4); 122.44(i)(1)(iv)(A). 3. Except for records of monitoring information required by this permit related to the permittee's sewage sludge use and disposal activities, which shall be retained for a period of at least five years (or longer as required by 40 CFR part 503), the permittee shall retain records of all monitoring information, including all calibration and maintenance records and all original strip chart recordings for continuous monitoring instrumentation, copies of all reports required by this permit, and records of all data used to complete the application for this permit, for a period of at least 3 years from the date of the sample, measurement, report or application. This period of retention shall be extended during the course of any unresolved litigation regarding the discharge of pollutants by the permittee or when requested by the Division or Regional Administrator. 4. Records of monitoring information must include: a. The date, exact place, and time of sampling or measurements; b. The individual(s) who performed the sampling or measurements; c. The date(s) analyses were performed d. The individual(s) who performed the analyses; e. The analytical techniques or methods used; and f. The results of such analyses. 5. The permittee shall install, calibrate, use and maintain monitoring methods and equipment, including biological and indicated pollutant monitoring methods. See Regulation 61.8(4)(b)(iii). All sampling shall be performed by the permittee according to sufficiently sensitive test procedures required by 40 C.F.R. 122.44(i)(1)(iv) or methods approved by the Division, in the absence of a method specified in or approved pursuant to 40 C.F.R. Part 136. 6. The CWA provides that any person who falsifies, tampers with, or knowingly renders inaccurate any monitoring device or method required to be maintained under this permit shall, upon conviction, be punished by a fine of not more than $10,000, or by imprisonment for not more than 2 years, or both. If a conviction of a person is for a violation committed after a first conviction of such person under this paragraph, punishment is a fine of not more than $20,000 per day of violation, or by imprisonment of not more than 4 years, or both. 7. Documentation required by this permit, including records of all data used to complete the application for permit coverage to be covered by this permit, stormwater management plans, inspection reports, etc., must be retained for at least three years from the date that permit coverage expires or is terminated. This period may be extended by request of EPA or the division at any time. SIGNATORY REQUIREMENTS 1. Authorization to Sign: All documents required to be submitted to the Division by the permit must be signed in accordance with 40 CFR §122.22, Regulation 61.4, and the following criteria: a. For a corporation: By a responsible corporate officer. For the purpose of this subsection, a responsible corporate officer means: (i) a president, treasurer, or vice president of the corporation in charge of a principal business function, or any other person who performs similar policy- or decision-making functions for the corporation, or (ii) the manager of one or more manufacturing, production, or operating facilities, provided, the manager is authorized to make management decisions which govern the operation of the regulated facility including having the explicit or implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long term Page 25 of 31 Permit No. COR400000 environmental compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures. The responsible official may be a project manager if the project manager has level of control at a corporation as required in this subpart a. b. For a partnership or sole proprietorship: By a general partner or the proprietor, respectively; or c. For a municipality, state, federal, or other public agency: By either a principal executive officer or ranking elected official. For purposes of this subsection, a principal executive officer of a federal agency includes (i) the chief or principal executive officer of the agency, or (ii) a senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency. (e.g., Regional Administrator of EPA), and at the city, municipal, state or other government entity it typically will include a program director (e.g. Director of Public Works, Director of Transportation, Director of Parks and Recreation, etc.). For purposes of this section, a principal executive officer has responsibility for the overall operation of the facility from which the discharge originates. d. By a duly authorized representative in accordance with 40 C.F.R. 122.22(b), only if: i. the authorization is made in writing by a person described in Part II.K.1.a, b, or c above; ii. The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position); and, iii. The written authorization is submitted to the Division. 2. Any person(s) signing documents required for submittal to the Division must make the following certification: “I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.” 3. The CWA provides that any person who knowingly makes any false statement, representation, or certification in any record or other document submitted or required to be maintained under this permit, including monitoring reports or reports of compliance or non-compliance shall, upon conviction, be punished by a fine of not more than $10,000 per violation, or by imprisonment for not more than 6 months per violation, or by both. See 40 C.F.R. §122.41(k)(2). REPORTING REQUIREMENTS 1. Planned Changes: The permittee shall give advance notice to the Division, in writing, of any planned physical alterations or additions to the permitted facility in accordance with 40 CFR §122.41(l) and Regulation 61.8(5)(a) and Part II.O. of this permit. Notice is required only when: a. The alteration or addition to a permitted facility may meet one of the criteria for determining whether a facility is a new source in 40 CFR §122.29(b); or b. The alteration or addition could significantly change the nature or increase the quantity of pollutants discharged. This notification applies to pollutants which are subject neither to effluent limitations in the permit, nor to notification requirements under 40 CFR §122.41(a)(1). c. The alteration or addition results in a significant change in the permittee's sludge use or disposal practices, and such alteration, addition, or change may justify the application of permit conditions that are different from or absent in the existing permit, including notification of additional use or disposal sites not reported during the permit application process or not reported pursuant to an approved land application plan. See 40 C.F.R. §122.41(l)(1)(iii). Page 26 of 31 Permit No. COR400000 2. Anticipated Non-Compliance: The permittee shall give advance notice to the Division, in writing, of any planned changes in the permitted facility or activity that may result in noncompliance with permit requirements. The timing of notification requirements differs based on the type of non-compliance as described below. 3. Transfer of Ownership or Control: The permittee shall notify the Division, in writing, ten (10) calendar days in advance of a proposed transfer of the permit. The notice must include a written agreement between the existing and new permittee(s) containing a specific date for transfer of permit responsibility, coverage and liability between them. This permit is not transferable to any person except after notice to the Division. The Division may require modification or revocation and reissuance of the permit to change the name of the permittee and incorporate such other requirements as may be necessary under the Clean Water Act. See Regulation 61.8(6); 40 C.F.R. §§ 122.41(l)(iii) and 122.61. 4. Monitoring reports: Monitoring results must be reported at the intervals specified in this permit. a. If the permittee monitors any pollutant at the approved monitoring locations listed in Part I more frequently than that required by this permit using test procedures approved under 40 CFR Part 136, or another method required for an industry-specific waste stream under 40 CFR subchapters N or O, the results of such monitoring shall be included in the calculation and reporting of the data submitted in the DMR or sludge reporting form specified by the Division. See 40 CFR 122.41(l)(4). b. Calculations for all limitations which require averaging of measurements shall utilize an arithmetic mean unless otherwise specified by the Division in the permit. 5. Submission of Discharge Monitoring Reports (DMRs): DMRs shall be submitted electronically through NetDMR system unless the permittee requests and is granted a waiver of the electronic reporting requirement by the Division pursuant to Regulation 61.8(4)(d). 6. Compliance Schedules: Reports of compliance or noncompliance with, or any progress reports on, interim and final requirements contained in any compliance schedule in the permit, shall be submitted on or before the date listed in the compliance schedule section. The fourteen (14) calendar day provision in Regulation 61.8(4)(n)(i) has been incorporated into the due date. 7. Twenty-four hour reporting: a. In addition to the reports required elsewhere in this permit, the permittee shall report the following circumstances on the Division’s submission form within twenty-four (24) hours from the time the permittee becomes aware of the circumstances, and shall submit to the Division a written report containing the information requested within five (5) working days after becoming aware of the following circumstances: i. Circumstances leading to any noncompliance which may endanger health or the environment regardless of the cause of the incident; ii. Circumstances leading to any unanticipated bypass which exceeds any effluent limitations in the permit; iii. Circumstances leading to any upset which causes an exceedance of any effluent limitation in the permit; or iv. Daily maximum violations for any of the pollutants limited by Part I.A of this permit as specified in Part III of this permit. This includes any toxic pollutant or hazardous substance or any pollutant specifically identified as the method to control any toxic pollutant or hazardous substance. b. The report shall contain a description of the noncompliance and its cause; the period of noncompliance, including exact dates and times, and if the noncompliance has not been corrected, the anticipated time it is expected to continue; and steps taken or planned to reduce, eliminate, and prevent reoccurrence of the noncompliance. c. For noncompliance events related to combined sewer overflows, sanitary sewer overflows, or bypass events, these reports must include the data described above (with the exception of time of discovery) as well as the type of event (combined sewer overflows, sanitary sewer overflows, or bypass events), type of sewer overflow structure (e.g., manhole, combine sewer overflow outfall), discharge volumes untreated by the treatment works treating domestic sewage, types of human health and environmental impacts of the sewer overflow event, and whether the noncompliance was related to wet weather. See 40 CFR 122.41(l)(6)(i). Page 27 of 31 Permit No. COR400000 i. As of December 21, 2020 all reports related to combined sewer overflows, sanitary sewer overflows, or bypass events submitted in compliance with this section must be submitted electronically by the permittee to the Division. 8. Other non-compliance: A permittee must report all instances of noncompliance at the time monitoring reports are due. These reports may be submitted annually in accordance with Regulation 61.8(4)(p) and/or 61.8(5)(f), but may be submitted at a more frequent interval. BYPASS 1. Definitions: a. “Bypass” means the intentional diversion of waste streams from any portion of a treatment facility in accordance with 40 CFR §122.41(m)(1)(i) and/or Regulation 61.2(12). b. Severe property damage means substantial physical damage to property, damage to the treatment facilities which causes them to become inoperable, or substantial and permanent loss of natural resources which can reasonably be expected to occur in the absence of a bypass. Severe property damage does not mean economic loss caused by delays in production. See 40 CFR §122.41(m)(1)(ii). 2. Bypass not exceeding limitations. The permittee may allow any bypass to occur which does not cause effluent limitations to be exceeded, but only if it also is for essential maintenance to assure efficient operation. These bypasses are not subject to the provisions of 40 CFR 122.41(m)(3) and (m)(4). See 40 CFR §122.41(m)(2). 3. Notice of bypass: a. Anticipated bypass. If the permittee knows in advance of the need for a bypass, the permittee shall submit prior notice, if possible, at least ten (10) days before the date of the bypass. See 40 CFR §122.41(m)(3)(i) and/or Regulation 61.9(5)(c). b. Unanticipated bypass. You must submit notice of an unanticipated bypass as required in Part II.L.7. See also 40 CFR §122.41(m)(3)(ii). 4. Prohibition of Bypass: Bypasses are prohibited and the Division may take enforcement action against the permittee for bypass, unless: a. the bypass is unavoidable to prevent loss of life, personal injury, or severe property damage; b. There were no feasible alternatives to the bypass, such as the use of auxiliary treatment facilities, retention of untreated wastes, or maintenance during normal periods of equipment downtime. This condition is not satisfied if adequate backup equipment should have been installed in the exercise of reasonable engineering judgment to prevent a bypass which occurred during normal periods of equipment downtime or preventive maintenance; and c. Proper notices were submitted to the Division. i. The Division may approve an anticipated bypass, after considering its adverse effects, if the Division determines that it will meet the three conditions listed. UPSET 1. Definition: “Upset” means an exceptional incident in which there is unintentional and temporary noncompliance with technology based permit effluent limitations because of factors beyond the reasonable control of the permittee. An upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventative maintenance, or careless or improper operation. See 40 CFR §122.41(n) and Regulation 61.2(113). 2. Effect of an upset: An upset constitutes an affirmative defense to an action brought for noncompliance with permit effluent limitations if the requirements of section 3 are met. A determination made during administrative review of claims that noncompliance was caused by upset is final administrative action subject to judicial review in accordance with Regulation 61.8(3)(j). **special note:** this provision is consistent with the definition of “Upset” as codified in Regulation 61.2(113). However, the Colorado regulatory definition of upset is less stringent than the federal code of regulations, which restricts the use of an upset defense to noncompliance with technology-based permit effluent limitations only. Page 28 of 31 Permit No. COR400000 3. Conditions necessary for demonstration of an Upset: A permittee who wishes to establish the affirmative defense of upset shall demonstrate through properly signed contemporaneous operating logs, or other relevant evidence that: a. an upset occurred and the permittee can identify the cause(s) of the upset; b. the permitted facility was at the time being properly maintained; and c. the permittee submitted notice of the upset as required in Part II.L.7 (24-hour notice); and d. The permittee complied with any remedial measure necessary to minimize or prevent any discharge or sludge use or disposal in violation of this permit which has a reasonable likelihood of adversely affecting human health or the environment. See also 40 C.F.R. 122.41(n)(3)(i)-(iv). **special note:** this provision is consistent with the definition of “Conditions necessary for demonstration of upset” as codified in Regulation 61.8(3)(j)(ii). However, the Colorado regulatory definition of upset is less stringent than the federal code of regulations, which restricts the use of an upset defense to demonstrate that a facility was properly operated and maintained. Colorado’s regulatory definition of “Conditions necessary for demonstration of upset” is less stringent than the requirements of the federal Clean Water Act. 4. In addition to the demonstration required above, a permittee who wishes to establish the affirmative defense of upset for a violation of effluent limitations based upon water quality standards shall also demonstrate through monitoring, modeling or other methods that the relevant standards were achieved in the receiving water. 5. Burden of Proof: In any enforcement proceeding, the permittee seeking to establish the occurrence of an upset has the burden of proof. REOPENER CLAUSE Procedures for modification or revocation. Permit modification or revocation of this permit or coverage under this permit will be conducted according to Regulation 61.8(8). This permit may be reopened and modified (following proper administrative procedures) to include the appropriate effluent limitations (and compliance schedule, if necessary), or other appropriate requirements if one of the following events occurs, including but not limited to: 1. Water Quality Standards: The water quality standards of the receiving water(s) to which the permittee discharges are modified in such a manner as to require different effluent limits than contained in this permit. 2. Wasteload Allocation: A wasteload allocation is developed and approved by the State of Colorado and/or EPA for incorporation in this permit. 3. Discharger-specific variance: A variance is adopted by the Water Quality Control Commission. OTHER INFORMATION When the permittee becomes aware that it failed to submit any relevant facts in a permit application, or submitted incorrect information in a permit application or in any report to the Division or U.S. EPA, the Discharger shall promptly submit such facts or information. See 40 C.F.R. § 122.41(l)(8). SEVERABILITY The provisions of this permit are severable. If any provisions or the application of any provision of this permit to any circumstances, is held invalid, the application of such provision to other circumstances and the application of the remainder of this permit shall not be affected. NOTIFICATION REQUIREMENTS 1. Notification to Parties: All notification requirements, excluding application information submitted using the CEOS portal or twenty-four hour reporting via the submission form, shall be directed as follows: a. Oral Notifications, during normal business hours shall be to: CDPHE-Emergency Reporting Line: 1-877-518-5608; or Water Quality Protection Section – Compliance Program Water Quality Control Division Page 29 of 31 Permit No. COR400000 Telephone: (303) 692-3500 After hours notifications should be made to the CDPHE-Emergency Reporting Line: 1-877-518-5608. b. Written notification shall be to: Water Quality Protection Section – Compliance Program Water Quality Control Division Colorado Department of Public Health and Environment WQCD-WQP-B2 4300 Cherry Creek Drive South Denver, CO 80246-1530 RESPONSIBILITIES Reduction, Loss, or Failure of Treatment Facility: The permittee has the duty to halt or reduce any activity if necessary to maintain compliance with the effluent limitations of the permit. It shall not be a defense for a permittee in an enforcement action that it would be necessary to halt or reduce the permitted activity in order to maintain compliance with the conditions of this permit. OIL AND HAZARDOUS SUBSTANCES LIABILITY Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the permittee from any responsibilities, liabilities, or penalties to which the permittee is or may be subject to under Section 311 (Oil and Hazardous Substance Liability) of the Clean Water Act. EMERGENCY POWERS Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the permittee from any responsibilities, liabilities, or penalties established pursuant to any applicable State law or regulation under authority granted by Section 510 of the Clean Water Act. Nothing in this permit shall be construed to prevent or limit application of any emergency power of the Division. CONFIDENTIALITY Any information relating to any secret process, method of manufacture or production, or sales or marketing data which has been declared confidential by the permittee, and which may be acquired, ascertained, or discovered, whether in any sampling investigation, emergency investigation, Colorado Open Records Act (CORA) request, or otherwise, shall not be publicly disclosed by any member, officer, or employee of the Water Quality Control Commission or the Division, but shall be kept confidential. Any person seeking to invoke the protection of this section shall bear the burden of proving its applicability. This section shall never be interpreted as preventing full disclosure of effluent data. FEES The permittee is required to submit payment of an annual fee as set forth in the 2016 amendments to the Water Quality Control Act. Section 25-8-502 (1.1) (b), and the Regulation 61.15 as amended. Failure to submit the required fee when due and payable is a violation of the permit and will result in enforcement action pursuant to Section 25-8-601 et. seq., C.R.S.1973 as amended. DURATION OF PERMIT The duration of a permit shall be for a fixed term and shall not exceed five (5) years. If the permittee desires to continue to discharge, a permit renewal application shall be submitted at least one hundred eighty (180) calendar days before this permit expires. Filing of a timely and complete application shall cause the expired permit to continue in force to the effective date of the new permit. The permit's duration may be extended only through administrative extensions and not through interim modifications. If the permittee anticipates there will be no discharge after the expiration date of this permit, the Division should be promptly notified so that it can terminate the permit in accordance with Regulation 61. SECTION 307 TOXICS If a toxic effluent standard or prohibition, including any applicable schedule of compliance specified, is established Page 30 of 31 Permit No. COR400000 by regulation pursuant to Section 307 of the Clean Water Act for a toxic pollutant which is present in the permittee's discharge and such standard or prohibition is more stringent than any limitation upon such pollutant in the discharge permit, the Division shall institute proceedings to modify or revoke and reissue the permit to conform to the toxic effluent standard or prohibition. SECTION 4 SWPPP Narrative Contents 1.0. PROJECT CONTACT INFORMATION .............................................................................................................. 1 2.0. INTRODUCTION AND DEFINITIONS .............................................................................................................. 2 2.1. ACRONYMS ..................................................................................................................................... 2 2.2. DEFINITIONS ................................................................................................................................... 2 3.0. SITE DESCRIPTION .............................................................................................................................. 5 4.0. EROSION AND SEDIMENT CONTROLS ..................................................................................................... 6 4.1. EROSION AND SEDIMENT CONTROL DESIGN REQUIREMENTS .............................................................. 7 4.2. STABILIZATION REQUIREMENTS ....................................................................................................... 7 5.0. STORMWATER MANAGEMENT CONTROLS ............................................................................................. 8 6.0. POLLUTION PREVENTION AND SPILL PREVENTION AND RESPONSE ........................................................... 9 6.1. AUTHORIZED DISCHARGES ............................................................................................................... 9 6.2. ALLOWABLE NON-STORMWATER DISCHARGES .................................................................................. 9 6.3. POTENTIAL POLLUTANTS ................................................................................................................ 10 6.4. NONREPORTABLE SPILL PROTOCOL ................................................................................................. 16 6.5. REPORTABLE SPILL PROTOCOL ....................................................................................................... 16 7.0. SWMP IMPLEMENTATION ................................................................................................................... 18 7.1. INSPECTIONS ................................................................................................................................ 18 7.2. MAINTENANCE AND CORRECTIVE ACTIONS ..................................................................................... 19 7.3. REVIEW AND REVISION .................................................................................................................. 19 7.4. TRANSFER OF OWNERSHIP ............................................................................................................. 20 7.5. PERMIT TERMINATION ................................................................................................................... 20 7.6. RECORDS ...................................................................................................................................... 20 8.0. REFERENCES ......................................................................................... Error! Bookmark not defined. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 1 1.0. PROJECT CONTACT INFORMATION Parties directly related to the compliance of the site are listed below. Any blank contacts were not known at the time of SWMP creation and should be filled in when contractors are assigned. Should any of the above personnel change, tables will be updated and noted on the Amendment Log found in Section 8 and additional Contractor Certification Sheets will be added to Section 1 of this SWMP. Owner Patrick Duncan Sit & Stay, LLC 1121 Belaire Drive Fort Collins, CO 80521 Operator SWMP Preparer Hunter Ward Olsson 1880 Fall River Dr, Suite 200 Loveland, CO 80538 970.461.7733 hward@olsson.com Qualified Stormwater Manager Control Measure (CM) Installation CM Maintenance Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 2 2.0. INTRODUCTION AND DEFINITIONS This document was created to comply with the provisions of the Colorado Water Quality Control Act, (25-8-101 et seq., CRS, 1973 as amended) and the Federal Water Pollution Control Act, as amended (33 U.S.C. 1251 et seq.; the “Act”). Permit language incorporated into this document will be denoted by italics. The purpose of the SWMP is to ensure the design, implementation, management, and maintenance of control measures (CM) in order to prevent sediment and other pollutants in stormwater discharges associated with the land disturbance activities in compliance with the terms and conditions of the general permit. 2.1. ACRONYMS AST ........................... aboveground storage tank BMP .......................... best management practice CM ............................ control measure ESA .......................... environmental site assessment ESC .......................... erosion and sediment control CDPHE ..................... Colorado Department of Public Health and Environment MS4 .......................... municipal separate storm sewer system NOI ........................... Notice of Intent NOT .......................... Notice of Termination NRC .......................... National Response Center REC .......................... recognized environmental condition RECP ........................ rolled erosion control blanket SPCC ........................ spill prevention control and countermeasures plan SVOC ....................... semivolatile organic compound SWMP ...................... stormwater management plan TMDL ........................ total maximum daily load TOC .......................... total organic carbon VOC .......................... volatile organic compound 2.2. DEFINITIONS Updated definitions can be found in the COR400000 permit language located in section 3 of this SWMP binder Control Measure Any best management practice or other method used to prevent or reduce the discharge of pollutants to state waters. Control measures include, but are not limited to, best management practices. Control measures can include other methods such as the installation, operation, and maintenance of structural controls and treatment devices (CDPHE 2019). Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 3 Final Stabilization The condition reached when all ground surface disturbing activities at the site have been completed, and for all areas of ground surface disturbing activities where a uniform vegetative cover has been established with an individual plant density of at least 70 percent of pre- disturbance levels, or equivalent permanent, physical erosion reduction methods have been employed (CDPHE 2019). Infeasible Not technologically possible, or not economically practicable and achievable in light of best industry practices (CDPHE 2019). Operator The party that has operational control over day-to-day activities at a project site which are necessary to ensure compliance with the permit. This party is authorized to direct individuals at a site to carry out activities required by the permit (CDPHE 2019). Owner The party that has overall control of the activities and that has funded the implementation of the construction plans and specifications. This is the party with ownership of, a long term lease of, or easements on the property on which the construction activity is occurring (e.g., the developer) (CDPHE 2019). Permittee(s) The owner and operator named in the discharge certification issued under this permit for the construction site specified in the certification (CDPHE 2019). Qualified Stormwater Manager An individual knowledgeable in the principles and practices of erosion and sediment control and pollution prevention, and with the skills to assess conditions at construction sites that could impact stormwater quality and to assess the effectiveness of stormwater controls implemented to meet the requirements of this permit (CDPHE 2019). Signatory Requirements All documents required to be submitted to the division by the permit must be signed in accordance with the following criteria: • For a corporation: By a responsible corporate officer. For the purpose of this subsection, a responsible corporate officer means: o A president, secretary, treasurer, or vice president of the corporation in charge of a principal business function, or any other person who performs similar policy or decision making functions for the corporation, or o The manager of on or more manufacturing, production, or operating facilities, provided, the manager is authorized to make management decisions which govern the operation of the regulated facility including having the explicit or Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 4 implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long term environmental compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or actions taken to gather complete and accurate information for permit application requirements; and where authority to sign documents has been assigned or delegated to the manager in accordance with corporate procedures. • For a partnership or sole proprietorship: By a general partner or the proprietor, respectively; or • For a municipality, state, federal, or other public agency: By either or principal executive officer or ranking elected official. For purposes of this subsection, a principal executive officer of a federal agency includes o The chief executive officer of the agency, or o A senior executive officer having responsibility for the overall operations of a principal geographic unit of the agency (CDPHE 2019). Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 5 3.0. SITE DESCRIPTION Project Name: Lot 3, Country Club Corners Sixth Filing Project Location: 1524 North College Avenue, Fort Collins, CO 80521 Total project area: 2.19-acres Area to be disturbed: 2.19-acres Past use: This lot is and has been vacant and undeveloped. Existing conditions: Soils consist completely of Nunn clay loam (Hydrologic soil group C). Existing vegetation density is moderate with native grasses. Due to the established vegetation and relatively flat nature of the site the possibility of erosion is low. Description of Construction Activity: Once all erosion control measures outlined within this document are implemented, the Country Club Corners, Lot 3, Sixth Filing site will have new utilities and storm sewer infrastructure installed on site. Once installed, site paving and infrastructure will begin. Location of nearby or on-site surface waters: The site currently drains north west to south east into existing road flowlines. Receiving Waters: Runoff from the building roof will be collected and conveyed in roof drains and discharged into underground detention basins located in the yard to the northeast of the building and the landscape area to the south of the building. The runoff from the parking and landscape areas will be captured within curb and landscape inlets and conveyed to two underground detention areas to the north and south via storm sewer pipes before being discharged at a rate no greater than the historic 2-year runoff rate of 0.2 cfs/acre. After storm sewer in the easterly access road from the site, runoff is conveyed to Bristlecone storm sewer which leads to the NECCO regional drainage facility. The ultimate discharge for all stormwater runoff is the Poudre River. Is this project related to a public emergency response? ☐ Yes ☒ No Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 6 4.0. EROSION AND SEDIMENT CONTROLS Temporary CMs used during active construction of the project will be listed below. Specific erosion and sediment control requirements found in the permit are also located here and should be addressed in the erosion and sediment control (ESC) plan sheets located in Section 6 of this SWMP. Table 1. Anticipated CMs. Specification and detail sheets can be found in Section 7 of this SWMP. During construction, if additional CMs not listed in Table 1 are required, the SWMP will be amended. The CM specification and detail sheets of the new CMs should be added to Section 7 of this SWMP, the locations noted on the SWMP Tracking Map located in Section 6, and the change noted in the Log of Revisions located in Section 8 of this SWMP. CM Sediment Control Rock Sock ☒ Inlet protection ☒ Sediment basin ☒ Sediment trap ☐ Vegetative buffers ☒ Chemical treatment ☐ Erosion Control Surface roughening ☒ Temporary and Permanent Seeding ☒ Wheel Rolled Berm ☒ Wattles ☒ Compost blanket and filter berm ☐ RECP ☐ Temporary slope drain ☐ Temporary outlet protection ☐ Temporary Inlet Protection ☒ Earth dikes and drainage swales ☐ Terracing ☐ Check dams ☐ Streambank stabilization ☐ RIP-RAP ☐ CM Site Management Construction phasing / Sequencing ☒ Protection of existing vegetation ☐ Construction fence ☒ Vehicle tracking control ☒ Stabilized construction roadway ☐ Stabilized staging area ☒ Street sweeping and vacuuming ☐ Temporary diversion methods ☐ Dewatering operations ☐ Temporary stream crossing ☐ Temporary batch plant ☐ Paving and grinding operations ☐ Material Management Concrete washout area ☒ Stockpile management ☒ Good housekeeping practices ☒ Sediment Control Silt fence ☒ Sediment control log ☒ Straw bale barrier ☐ Brush barrier ☐ Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 7 4.1. EROSION AND SEDIMENT CONTROL DESIGN REQUIREMENTS ESC plans for the project will be used as the basis of the SWMP Tracking Map located in Section 6 of this SWMP. • construction site boundaries; • flow arrows that depict stormwater flow directions on-site and runoff direction; • all areas of ground disturbance including areas of borrow and fill; • areas used for storage of soil; • locations of all waste accumulation areas, including areas for liquid, concrete, masonry, and asphalt; • locations of dedicated asphalt, concrete batch plants and masonry mixing stations; • locations of all structural control measures; • locations of all non-structural control measures; • locations of springs, streams, wetlands and other state waters, including areas that require pre-existing vegetation be maintained within 50 feet of a receiving water, where determined feasible in accordance with Part I.B.1.a. i.(d).; and • locations of all stream crossings located within the construction site boundary (CDPHE 2019). 4.2. STABILIZATION REQUIREMENTS Stabilization of disturbed areas are crucial in preventing onsite erosion during construction. Below are the permit requirements for stabilization. Temporary stabilization must be implemented for earth disturbing activities on any portion of the site where ground disturbing construction activity has permanently ceased, or temporarily ceased for more than 14 calendar days. Temporary stabilization methods may include, but are not limited to, tarps, soil tackifier, and hydroseed. The permittee may exceed the 14-day schedule when either the function of the specific area of the site requires it to remain disturbed, or, physical characteristics of the terrain and climate prevent stabilization. The SWMP must document the constraints necessitating the alternative schedule, provide the alternate stabilization schedule, and identify all locations where the alternative schedule is applicable on the site map. Final stabilization must be implemented for all construction sites. Final stabilization is reached when all ground surface disturbing activities at the construction site are complete; and, for all areas of ground surface disturbing activities, either a uniform vegetative cover with an individual plant density of at least 70 percent of pre-disturbance levels is established, or equivalent permanent alternative stabilization methods are implemented. The division may approve alternative final stabilization criteria for specific operations (CDPHE 2019). Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 8 5.0. STORMWATER MANAGEMENT CONTROLS When applicable, permanent stormwater management control measures will be listed here. Design specifications and details can be found in Section 7 of this SWMP. These CMs will remain in place to provide for stormwater management after construction has completed and the permit has been terminated. Table 2. Post Construction Stormwater Management Control Measures. Type Location Stormtech MC-3500 Stormwater Tank Under Southern Dog Park Stormtech MC-3500 Stormwater Tank Under Northeast Building Corner Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 9 6.0. POLLUTION PREVENTION AND SPILL PREVENTION AND RESPONSE Storm runoff from this site will be routed to underground Stormtech chambers via storm sewer. Upon entering the Stormtech chambers, the runoff will initially flow into isolator rows where the water can infiltrate through woven geotextile fabric into a layer of foundation stone. These isolator rows are oversized can hold more than the required WQCV. All flow generated from this site if captured by storm sewer and conveyed to the underground Stormtech chambers to be treated for water quality. Any site-specific pollutants generated from the development of the site will be treated prior to being released into the existing storm sewer system. 6.1. AUTHORIZED DISCHARGES This general permit authorizes permittees to discharge the following to state waters: Stormwater associated with construction activity and specified non-stormwater associated with construction activity (CDPHE 2019). 6.2. ALLOWABLE NON-STORMWATER DISCHARGES The below signified discharges are anticipated to occur on-site. ☐ Discharges to the ground of concrete masonry washout water associated with the washing of concrete masonry tools and concrete or masonry mixer chutes, and water used to wash vehicles, equipment and external buildings. Discharges of concrete or masonry washout water must not leave the site as surface runoff or reach receiving waters as defined by this permit. The addition of soaps, solvents and detergents is prohibited. Concrete or masonry on-site waste disposal is not authorized by this permit except in accordance with Part I.B.1.a.ii(c) of the permit. ☐ Discharges from diversions of state waters within the permitted site. ☐ Discharges from uncontaminated springs that do not originate from an area of land disturbance ☐ Discharges to the ground of concrete washout water associated with the washing of concrete tools and concrete mixer chutes. ☒ Discharges of landscape irrigation return flow (CDPHE 2019) Potential CMs used for authorized non-stormwater discharges: Discharges to the ground of concrete washout water associated with the washing of concrete tools and concrete mixer chutes Concrete washwaters should be treated in a way to minimize discharge to ground and surface waters. Discharges that may reach groundwater must flow through soil that has buffering Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 10 capacity prior to reaching groundwater. The concrete washout location should not be located in an area where shallow groundwater may be present and would result in buffering capacity not being adequate, such as near natural drainages, springs or wetlands. Lined washout pits should be utilized if placed within 400 feet of any natural drainage pathway or waterbody or within 1,000 feet of any wells or drinking water sources. Discharges of landscape irrigation return flow Efforts should be taken to time watering activities that are intended to help establish vegetation, so watering does not occur prior to or during precipitation. Areas should be watered only in amounts necessary for vegetation to establish or thrive. Irrigated areas should be monitored for overwatering and, if identified, amounts and timing of watering should be adjusted. Discharges to the ground of concrete or masonry washout water associated with the washing of concrete or masonry tools and concrete or masonry mixer chutes, and water used to wash vehicles, equipment and external buildings. Discharges of concrete or masonry washout water must not leave the site as surface runoff or reach receiving waters as defined by this permit. The addition of soaps, solvents and detergents is prohibited. Concrete or masonry on-site waste disposal is not authorized by this permit except in accordance with parti.B.a.ii(c) of the permit. Concrete washwaters should be treated in a way to minimize discharge to ground and surface waters. Discharges that may reach groundwater must flow through soil that has buffering capacity prior to reaching groundwater. The concrete washout location should not be located in an area where shallow groundwater may be present and would result in buffering capacity not being adequate, such as near natural drainages, springs or wetlands. Lined washout pits should be utilized if placed within 400 feet of any natural drainage pathway or waterbody or within 1,000 feet of any wells or drinking water sources. 6.3. POTENTIAL POLLUTANTS Potential pollutant sources that are anticipated to be on-site during the project can be found in the table below. Table 3. Anticipated Potential Pollutants. The below listed suggested CMs are meant as initial examples and should be adjusted as site conditions necessitate different CMs. The table should be amended should additional pollutants and CMs be utilized onsite that were not originally anticipated. Material/Activity Potential Pollutants Suggested CMs Temporary Batch Plant (concrete/asphalt) pH, heavy metals, petroleum hydrocarbons Locate batch plants away from storm drain inlets and surface waters. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 11 Run-on controls should be installed around the batch plant. Perimeter controls such as silt fence, wattles or berms should be installed to contain the plant. Vehicle tracking control should be installed for ingress and egress of vehicles and equipment. Stockpiled materials should be properly managed and contained. A designated concrete washout area should be installed. Concrete Curing Substances Sediment, metals, hydrocarbons Provide secondary containment in preparation and cleanup areas. Leftover curing substances should to be removed from the site or disposed of in a designated washout bin or pit designed to contain curing substances. Do not use materials during or directly prior to an anticipated rain event, and ensure excess materials are stored in a covered area to minimize contact with stormwater. Curing compounds should not be washed into a gutter, onto the ground, or into a storm drain inlet. Concrete Washwater and Masonry Washwater pH, heavy metals, silica Concrete washwater will be controlled /contained at a designated location on-site such as a leak-proof container or settling basin of adequate size unless an approved offsite alternative is provided. Refer to Concrete Washout Area (CWA) Specification located in Section 7 of this SWMP for proper design criteria and use of concrete washout area. The concrete washout area should be cleaned out when it has reached about two-thirds of its capacity, and dried concrete material should be disposed of in accordance with state and local regulations. Dust or Particulate Generating Activities Fugitive dust, sediment Protecting existing vegetation can help slow wind velocities across the ground surface limiting the likelihood of soil particles becoming airborne. Application of water to wet the top layer of disturbed soil can be used. Care should be taken to not overwater and cause onsite erosion. Wind fences can be installed onsite to reduce wind speeds. Such fences should be installed perpendicular to the prevailing wind direction. Detergents pH, chlorine, surfactant Use of detergents on-site should be discouraged. Washing of vehicles or equipment that requires the use of detergents should occur off-site. Drywall and Joint Compound Vinyl acetate, acetaldehyde, calcium sulfate dehydrate, formaldehyde, silica Drywall and joint compound will be used on the interior of structures. Ideally these materials should be stored inside the structure out of contact of stormwater. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 12 If storage inside the structure is not practical, the materials should be placed in a storage container, contractor vehicle, or trailer or otherwise covered to minimize contact with stormwater. Waste products can be disposed of with construction debris as soon as possible and should not be allowed to accumulate on lots. Equipment and Vehicle Maintenance Fuels, solvents, grease, oil, lubricants Equipment and vehicle maintenance should be conducted offsite in an appropriate venue when possible. When maintenance must occur onsite, it should be done under cover when possible or with the use of drip pans or absorbents. Promptly clean up spills using dry methods and properly dispose of waste. Properly recycle or dispose of grease, oil, antifreeze, break fluid, cleaning solutions, hydraulic fluid, batteries, transmission fluid, worn parts, filters, and rags. Inspect outdoor storage areas regularly for drips, spills and improperly stored materials. This is particularly important for parking areas. Fertilizers Nutrients Fertilizers can be kept on-site in amounts necessary for immediate use. In the event fertilizers must remain on-site longer, they should be stored in a covered area to minimize contact with precipitation. Refer to the manufacturer’s recommendations for application and disposal. Do not over apply or apply before an anticipated runoff-producing rain event. Form Release Oil Petroleum hydrocarbons Do not remove the original product label from container. Store containers in a covered area or in contractor vehicles to minimize contact with stormwater. Follow the manufacturer’s recommended usage instructions. Do not use before or during any precipitation event. Use all of the product before disposing of the container and only place in a waste receptacle designated to receive this type of waste. Fuels and Oils Petroleum hydrocarbons and distillates If aboveground storage tanks (ASTs) are required, locations will be tracked on the SWMP map. A separate spill prevention containment and countermeasure (SPCC) plan will be developed should one or more of the following be present on-site: • Two or more ASTs with an aggregate of 1,320 gallons or more capacity (include storage vessels stored above ground with a capacity of 55 gallons or more with the aggregate total capacity) • Belowground oil storage vessels of 42,000 gallons or more Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 13 Smaller fuel containers and gas-powered equipment should be kept in secondary containment vessels to prevent spills or leaks during fueling and operation. Small gas cans can be kept in the back of trucks when not in use. Drip pans should be used for parked vehicles where leaks have been identified. Care should be taken when fueling equipment and vehicles if this action is to be conducted onsite. Soil stained with fuel or other petroleum products should be removed and disposed of in compliance with federal, state, and local requirements. Grease / Lubricants Petroleum hydrocarbons If grease is to be stored on-site, it should be stored in a covered location to minimize contact with stormwater. The application of lubricants should be conducted off-site or in an area with sufficient secondary containment measures to contain any leaks or spills. Lubricants should not be applied in rain or on exposed areas of machinery when precipitation is expected. Glue / Adhesives Organic aromatic compounds, semivolatile organic compounds (SVOC) Glue and adhesives may be used on-site for construction in interior work. Adhesives should be stored in covered areas and out of contact of precipitation. Materials will be used and disposed of in accordance with manufacturers recommendations. Exterior adhesives should not be applied during or immediately before anticipated precipitation events. Landscape Materials Nutrients, sediment, pH Landscape materials include—but are not limited to—items such as topsoil, compost, mulch, polymers, gypsum, and lime. If the materials are to be stored on-site for an extended amount of time they should be stored in a covered area or covered with plastic sheeting, tarps, or similar products to minimize contact with stormwater. Soil amendments should not be used before anticipated runoff producing rain events. Masonry Mixing Stations pH, heavy metals, silica Designated areas for mixing of masonry mortar, concrete or other substances should be utilized when feasible. Mixing areas should be contained with sediment barriers (i.e. silt fence, wattles, berms, etc.) when feasible. Stockpiled material should be contained and protected to minimize contact with precipitation when feasible. Excess materials and washwaters should be disposed of in an approved manner and should not be directed to driveways, streets, gutters or storm drains. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 14 Material Storage Solid waste, hydrocarbons, nutrients, sediment, hazardous materials As necessary and as space on the project allows, material storage areas should be dedicated on-site away from drainage courses and low areas. The number of access points to the material storage area should be limited, and materials should be stored away from drainage courses and low areas. Hazardous materials should be stored in containers or structures or otherwise covered to minimize contact with stormwater. Secondary containment should be provided for the area not only to contain spills but also to limit multiple access points. Paint pH, ethylene glycol, titanium oxide, volatile organic compounds (VOC) Paint washwater should be properly contained on-site in a designated area and handled similarly to concrete washwater. Used materials (i.e., soiled brushes, rollers, sprayers) and dried latex paint should be disposed of in appropriate waste receptacles, preferably off-site. Unused quantities of paint should be removed from site by trades and not disposed of on-site. Any quantities stored on-site should be stored in covered areas to minimize contact with stormwater. Pesticides, Herbicides Organophosphates, carbamates, triazines, chloroacetanilides, salts, heavy metals Pesticides and herbicides should be used and disposed of per manufacturer’s recommendations. Avoid overapplying products and avoid applying products before anticipated runoff-producing storm events. Storage of pesticides and herbicides on-site should be discouraged. Should storage on-site be required, items should be stored in covered areas to minimize contact with precipitation and stormwater. Spilled material should be promptly cleaned up per manufacturer’s recommendations. Refrigerants Various -fluoroethanes and -fluoromethanes Refrigerants will be used in heating, ventilation, and air- conditioning (HVAC) systems in built structures on-site. Refrigerants should not be stored on-site other than the volume needed for the HVAC systems. Refrigerants will be handled and disposed of by properly trained technicians. Sanitary Waste Bacteria, viruses, parasites Sanitary stations should be located where accidental discharge cannot flow to storm drains, gutters, surface waters, or conveyance channels. Locate stations on a level, permeable surface, away from drainage courses and low areas. These stations should not be located on streets, sidewalks, or on top of inlets. Stations will be inspected and maintained by a qualified person at frequent and regular intervals to assure cleanliness and proper operation. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 15 Sediment / Total Suspended Solids Turbidity, nutrients Surface water impairments caused by sediment and total suspended solids will have a higher risk of occurring in areas where soils have been disturbed for construction activities. Temporary controls are described in this SWMP to control and contain this potential pollutant during land-disturbing activities of the project. Vegetation (temporary or permanent stabilization) is a very efficient CM for controlling sediment and should be used whenever possible. Soil Stockpile Sediment, turbidity, nutrients Stockpiles should be located away from storm sewer inlets, in an area that will remain undisturbed for the longest period of time. Perimeter controls such as silt fence, sediment control logs, straw bales, etc. should be used to contain the stockpile on at least three sides. For stockpiles in active use, a stabilized access point on the upgradient side should be utilized. The stockpile should be stabilized with surface roughening, temporary seeding and mulching, erosion control blankets or soil binders if it is to be in place for an extended period. Solid Waste Floatable and blowable trash and debris Solid waste created from construction activities (including but not limited to scrap building material, product/material shipping waste, food containers, and cups) should be properly contained and removed frequently from the site for disposal. Receptacles should be emptied at regular intervals and as needed during times of high activity on the site. Efforts should be taken to minimize exposure of solids wastes generated on the site to stormwater. Solvents VOC, SVOC If solvents are stored on-site, they should be stored in a covered and secured area to prevent spills and minimize contact with stormwater. The materials will be used and disposed of per manufacturer’s recommendations and federal, state, and local regulations. Stains, Stucco, and Associated Materials Ethylene glycol, SVOC, VOC, silica, pH Secondary containment should be provided in mixing and cleanup areas. Leftover materials should be removed from the site or disposed of in an area designated to receive this type of waste. Do not use materials during a precipitation event, and ensure all excess materials are stored in a covered area to minimize contact with stormwater. Materials should not be washed into a gutter, on the ground, or into a storm drain inlet. If washing on-site, consider using a designated containment bin or pit for washwater. Vehicle Washing, Wheel Washwater Sediment, petroleum hydrocarbons, heavy metals It is recommended that routine vehicle washing occur offsite, however, if wheel washing is necessary on-site, it should be done in designated areas where washwater can collect in a basin or alternative control. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 16 Washwaters must be free of detergents, soaps, or solvents. Washing on paved surfaces should be discouraged unless water can be sufficiently treated before leaving the site. 6.4. NONREPORTABLE SPILL PROTOCOL Most spills can be cleaned up following manufacturer’s recommendations. Absorbent materials, sealable containers, plastic bags, and shovels/brooms are suggested as minimum spill response items that should be available in the form of a spill kit. • Containment and cleanup of spills should begin promptly after the spill is observed. • Sweep up small quantities of dry chemical or solids to reduce exposure to runoff. Shoveling may be used for larger quantities of materials. • Absorbents should be readily accessible in fueling areas or other areas susceptible to spills. • Wipe up small spills with a shop rag, store shop rags in appropriate containers, dispose of rags properly or use a professional industrial cleaning service. • Contain medium-sized spills with absorbents (e.g. kitty litter, sawdust) and use inflatable berms or absorbent “snakes” as temporary booms for the spill. Store and dispose of absorbents properly. Wet/dry vacuums may also be used, but not for volatile fluids. • Develop procedure and locations for containing and storing leaking containers. • Install drip pans below minor equipment leaks and properly dispose of collected material until a repair can be made. • For large spills, first contain the spill and plug storm drain inlets where the liquid may migrate off-site, then clean up the spill. • Excavation of spill areas to removed contaminated material may be required where large liquid spills occur on unpaved surfaces. • An inventory of cleanup materials should be maintained onsite and strategically located based on the types and quantities of chemicals present (UDFCD 2018). 6.5. REPORTABLE SPILL PROTOCOL Reportable spills occur when a spill threshold of certain materials set by federal, state or local agencies has been exceeded. Spill reports can be found in Section 10 of this SWMP. • If a spill of reportable quantity should occur, the Qualified Stormwater Manager(s) should be contacted as soon as the spill is identified. • If there is a contact for the locality in which the project is located, they should be notified as well as any downstream facilities or entities that may be affected. • Depending on the severity of the spill, the CDPHE 24-hour Environmental Emergency Reporting and Incident Reporting line should be contacted. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 17 Table 4. Spill Contact Information Contact Contact Number City of Fort Collins Environmental services 970.221.6600 Entity Contact Number CDPHE 24-hour Environmental Emergency Reporting and Incident Reporting 877.518.5608 National Response Center (NRC) 800.424.8802 Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 18 7.0. SWMP IMPLEMENTATION 7.1. INSPECTIONS Site inspections should be conducted by the qualified stormwater manager at the frequency indicated below. Site inspection reports can be stored in Section 13 of this SWMP unless otherwise noted. Permittees must conduct site inspections in accordance with one of the following minimum frequencies: ☒ At least one inspection every 7 calendar days ☐ At least one inspection every 14 calendar days, if post-storm event inspections are conducted within 24 hours after the end of any precipitation or snowmelt event that causes surface erosion. Post-storm inspections may be used to fulfill the 14-day routine inspection requirement. Note: • Inspection reports are required for each inspection and must be kept on-site. • Inspection reports must be retained for a minimum of 3 years. • All inspections must include observation of disturbed areas, the site perimeter, material storage areas, and control measures. When the site, or portions of a site are awaiting establishment of a vegetative ground cover and final stabilization, the permittee must conduct a thorough inspection of the stormwater management system at least once every 30 days. Post-storm event inspections are not required under this schedule. This reduced inspection schedule is allowed if all of the following criteria are met: i. all construction activities resulting in ground disturbance are complete; ii. all activities required for final stabilization, in accordance with the SWMP, have been completed, with the exception of the application of seed that has not occurred due to seasonal conditions or the necessity for additional seed application to augment previous efforts; and iii. the SWMP has been amended to locate those areas to be inspected in accordance with the reduced schedule allowed for in this paragraph. Inspections are not required for sites that meet all of the following conditions: construction activities are temporarily halted, snow cover exists over the entire site for an extended period, and melting conditions posing a risk of surface erosion do not exist. This inspection exception is applicable only during the period where melting conditions do not exist, and applies to the routine 7-day, 14-day and monthly inspections, as well as the post-storm- event inspections. When this inspection exclusion is implemented, the following information must be documented in accordance with the requirements in Part II: i. dates when snow cover existed; Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 19 ii. date when construction activities ceased; and iii. date melting conditions began (CDPHE 2019). 7.2. MAINTENANCE AND CORRECTIVE ACTIONS The permittee must ensure that all control measures remain in effective operating condition and are protected from activities that would reduce their effectiveness. Control measures must be maintained in accordance with good engineering, hydrologic and pollution control practices. Observations leading to the required maintenance of control measures can be made during a site inspection, or during general observations of site conditions. The necessary repairs or modifications to a control measure requiring routine maintenance, as defined in Part I.E., must be conducted to maintain an effective operating condition (CDPHE 2019). The permittee must assess the adequacy of control measures at the site, and the need for changes to those control measures, to ensure continued effective performance. When an inadequate control measure, as defined in Part I.E., is identified (i.e., new or replacement control measures become necessary), the following corrective action requirements apply. The permittee is in noncompliance with the permit until the inadequate control measure is replaced or corrected and returned to effective operating condition in compliance with Part I.B.1. and the general requirements in Part I.B.3. If the inadequate control measure results in noncompliance that meets the conditions of Part 11.L., the permittee must also meet the requirements of that section. • The permittee must take all necessary steps to minimize or prevent the discharge of pollutants, until a control measure is implemented and made operational and/or an inadequate control measure is replaced or corrected and returned to effective operating condition. If it is infeasible to install or repair of control measure immediately after discovering the deficiency, the following must be documented and kept on record in accordance with the recordkeeping requirements in Part II. o Describe why it is infeasible to initiate the installation or repair immediately; and o Provide a schedule for installing or repairing the control measure and returning it to an effective operating condition as soon as possible. • If applicable, the permittee must remove and properly dispose of any unauthorized release or discharge (e.g., discharge of non-stormwater, spill, or leak not authorized by this permit.) The permittee must also clean up any contaminated surfaces to minimize discharges of the material in subsequent storm events (CDPHE 2019). 7.3. REVIEW AND REVISION For the SWMP to remain affective and compliant with the general permit it must be updated to match site conditions. Amendments to the SWMP will be logged in Section 8 of this SWMP. Permittees must keep a record of SWMP changes made that includes the date and identification of the changes. The SWMP must be amended when the following occurs: • A change in design, construction, operation, or maintenance of the site requiring implementation of new or revised control measures; Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 20 • The SWMP proves ineffective in controlling pollutants in stormwater runoff in compliance with the permit conditions; • Control measures identified in the SWMP are no longer necessary and are removed; • Corrective actions are taken onsite that result in a change to the SWMP. For SWMP revisions made prior to or following a change(s) onsite, including revisions to sections addressing site conditions and control measures, a notation must be included in the SWMP that identifies the date of the site change, the control measure removed, or modified, the location(s) of those control measures, and any changes to the control measure(s). The permittee must ensure the site changes are reflected in the SWMP. The permittee is noncompliant with the permit until the SWMP revisions have been made (CDPHE 2019). 7.4. TRANSFER OF OWNERSHIP As necessary, records of ownership transfer and permitting documents should be placed in Section 2 of this SWMP. The permittee shall notify the division, in writing, ten (10) calendar days in advance of a proposed transfer of the permit. This permit is not transferable to any person except after notice is given to the division. • Where a facility wants to change the name of the permittee, the original permittee (the first owner or operators) must submit a Notice of Termination. • The new owner or operator must submit an application. See also signature requirements in Part 11.K (of the general permit). A permit may be automatically transferred to a new permittee if: • The current permittee notifies the Division in writing 30 calendar days in advance of the proposed transfer date; and • The notice includes a written agreement between the existing and new permittee(s) containing a specific date for transfer of permit responsibility, coverage and liability between them; and • The division does not notify the existing permittee and the proposed new permittee of its intent to modify, or revoke and reissue the permit (CDPHE 2019). 7.5. PERMIT TERMINATION When the project is complete and all the requirements of the permit, including final stabilization, have been met the permittee shall submit the NOT. A copy of the NOT and confirmation from the CDPHE can be found in Section 15 of this SWMP. 7.6. RECORDS When the project is complete, and the Notice of Termination has been accepted by the CDPHE, records should be removed from the site and retained. Copies of documentation required by this permit, including records of all data used to complete the application for permit coverage to be covered by this permit, must be retained for at least Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing May 2024 21 three years from the date that permit coverage expires or is terminated. This period may be extended by request of the EPA at any time (CDPHE 2019). 8.0. REFERENCES California Stormwater Quality Association. (November 2009). Stormwater Best Management Practice Handbook Portal: Construction. Retrieved from http://www.buenapark.com/home/showdocument?id=2557. Colorado Department of Public Health and Environment. (April 2019). CDPS General Permit Stormwater Discharges Associated with Construction Activity. Retrieved from https://www.colorado.gov/pacific/cdphe/cor400000-stormwater-discharge. Colorado Department of Public Health and Environment Water Quality Control Commission. (January 2012). Colorado Discharge Permit System Regulations. Retrieved from https://www.colorado.gov/pacific/sites/default/files/Regulation-Num-61-Colorado- Discharge-Permit-Sys-Regs.pdf. United States Environmental Protection Agency. (May 2007). Developing Your Stormwater Pollution Prevention Plan, A Guide for Construction Sites. Retrieved from https://www.epa.gov/sites/production/files/2015-10/documents/sw_SWMP_guide.pdf. Urban Drainage and Flood Control District. (April 2018). Urban Storm Drainage Criteria Manual: Volume 3 Stormwater Quality. https://udfcd.org/volume-three. SECTION 5 Location/Topographical Map(s), FIRM Maps & Soils Maps This section contains: -Required Location, Vicinity and Topographical Maps (as needed) -FIRM Maps -Soils Maps if needed © 2021 Microsoft Corporation © 2021 Maxar ©CNES (2021) Distribution Airbus DS © 2021 TomTom PROJECT LOCATION VICINITY MAP SCALE: 1"=500' United States Department of Agriculture A product of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local participants Custom Soil Resource Report for Larimer County Area, ColoradoNatural Resources Conservation Service September 21, 2021 9 Custom Soil Resource Report Soil Map 44 9 5 1 7 0 44 9 5 1 9 0 44 9 5 2 1 0 44 9 5 2 3 0 44 9 5 2 5 0 44 9 5 2 7 0 44 9 5 2 9 0 44 9 5 3 1 0 44 9 5 1 7 0 44 9 5 1 9 0 44 9 5 2 1 0 44 9 5 2 3 0 44 9 5 2 5 0 44 9 5 2 7 0 44 9 5 2 9 0 44 9 5 3 1 0 493700 493720 493740 493760 493780 493800 493700 493720 493740 493760 493780 493800 40° 36' 31'' N 10 5 ° 4 ' 2 8 ' ' W 40° 36' 31'' N 10 5 ° 4 ' 2 3 ' ' W 40° 36' 26'' N 10 5 ° 4 ' 2 8 ' ' W 40° 36' 26'' N 10 5 ° 4 ' 2 3 ' ' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84 0 35 70 140 210 Feet 0 10 20 40 60 Meters Map Scale: 1:779 if printed on A portrait (8.5" x 11") sheet. Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Map Unit Polygons Soil Map Unit Lines Soil Map Unit Points Special Point Features Blowout Borrow Pit Clay Spot Closed Depression Gravel Pit Gravelly Spot Landfill Lava Flow Marsh or swamp Mine or Quarry Miscellaneous Water Perennial Water Rock Outcrop Saline Spot Sandy Spot Severely Eroded Spot Sinkhole Slide or Slip Sodic Spot Spoil Area Stony Spot Very Stony Spot Wet Spot Other Special Line Features Water Features Streams and Canals Transportation Rails Interstate Highways US Routes Major Roads Local Roads Background Aerial Photography The soil surveys that comprise your AOI were mapped at 1:24,000. Warning: Soil Map may not be valid at this scale. Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale. Please rely on the bar scale on each map sheet for map measurements. Source of Map: Natural Resources Conservation Service Web Soil Survey URL: Coordinate System: Web Mercator (EPSG:3857) Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required. This product is generated from the USDA-NRCS certified data as of the version date(s) listed below. Soil Survey Area: Larimer County Area, Colorado Survey Area Data: Version 15, Jun 9, 2020 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Aug 11, 2018—Aug 12, 2018 The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident. Custom Soil Resource Report 10 Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 73 Nunn clay loam, 0 to 1 percent slopes 2.3 100.0% Totals for Area of Interest 2.3 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas. Custom Soil Resource Report 11 An identifying symbol precedes the map unit name in the map unit descriptions. Each description includes general facts about the unit and gives important soil properties and qualities. Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement. Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series. Some map units are made up of two or more major soils or miscellaneous areas. These map units are complexes, associations, or undifferentiated groups. A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps. The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example. An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example. An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example. Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example. Custom Soil Resource Report 12 Larimer County Area, Colorado 73—Nunn clay loam, 0 to 1 percent slopes Map Unit Setting National map unit symbol: 2tlng Elevation: 4,100 to 5,700 feet Mean annual precipitation: 14 to 15 inches Mean annual air temperature: 48 to 52 degrees F Frost-free period: 135 to 152 days Farmland classification: Prime farmland if irrigated Map Unit Composition Nunn and similar soils:85 percent Minor components:15 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Nunn Setting Landform:Terraces Landform position (three-dimensional):Tread Down-slope shape:Linear Across-slope shape:Linear Parent material:Pleistocene aged alluvium and/or eolian deposits Typical profile Ap - 0 to 6 inches: clay loam Bt1 - 6 to 10 inches: clay loam Bt2 - 10 to 26 inches: clay loam Btk - 26 to 31 inches: clay loam Bk1 - 31 to 47 inches: loam Bk2 - 47 to 80 inches: loam Properties and qualities Slope:0 to 1 percent Depth to restrictive feature:More than 80 inches Drainage class:Well drained Runoff class: Medium Capacity of the most limiting layer to transmit water (Ksat):Moderately low to moderately high (0.06 to 0.20 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Calcium carbonate, maximum content:7 percent Maximum salinity:Nonsaline (0.1 to 1.0 mmhos/cm) Sodium adsorption ratio, maximum:0.5 Available water supply, 0 to 60 inches: High (about 9.1 inches) Interpretive groups Land capability classification (irrigated): 3e Land capability classification (nonirrigated): 4e Hydrologic Soil Group: C Ecological site: R067BY042CO - Clayey Plains Hydric soil rating: No Custom Soil Resource Report 13 Minor Components Heldt Percent of map unit:10 percent Landform:Terraces Landform position (three-dimensional):Tread Down-slope shape:Linear Across-slope shape:Linear Ecological site:R067BY042CO - Clayey Plains Hydric soil rating: No Wages Percent of map unit:5 percent Landform:Terraces Landform position (three-dimensional):Tread Down-slope shape:Linear Across-slope shape:Linear Ecological site:R067BY002CO - Loamy Plains Hydric soil rating: No Custom Soil Resource Report 14 SECTION 6 SWMP Tracking Map & Land Disturbance Tracking Log This section contains: -Erosion and Sediment Control Plan sheet excerpts -Post Construction Stormwater Management Plan sheets if applicable -Stormwater Management Plan Tracking Map (Working SWMP Map) -Grading and Stabilization Activities Log (optional). This log may be used in conjunction with the SWMP Tracking Map or the map alone may be used Grading and Stabilization Activities Log Date Activity Initiated Description of Grading/Dewatering Activity Date Activity Ceased (Indicate Temporary or Permanent) Date When Stabilization Measures Initiated Description of Stabilization Measure and Location Grading and Stabilization Activities Log Date Activity Initiated Description of Grading/Dewatering Activity Date Activity Ceased (Indicate Temporary or Permanent) Date When Stabilization Measures Initiated Description of Stabilization Measure and Location Grading and Stabilization Activities Log Date Activity Initiated Description of Grading/Dewatering Activity Date Activity Ceased (Indicate Temporary or Permanent) Date When Stabilization Measures Initiated Description of Stabilization Measure and Location LOT 3 COUNTRY CLUB CORNERS 6TH FILING 110,722 SF LOT 2 COUNTRY CLUB CORNERS 6TH FILING 47,546 SF LOT 1 COUNTRY CLUB CORNERS 6TH FILING 47,579 SF LOT 2 COUNTRY CLUB CORNERS 5TH FILING PRIVATE PARKING LOT LOT 5 COUNTRY CLUB CORNERS THIRD FILING RE V I S I O N S NO . RE V . DA T E RE V I S I O N S D E S C R I P T I O N project no.: approved by: checked by: drawn by: drawing no.: QA/QC by: date: OLSSON ASSUMES NO RESPONSIBILITY FOR EXISTING UTILITY LOCATIONS (HORIZONTAL OR VERTICAL). THE EXISTING UTILITIES SHOWN ON THIS DRAWING HAVE BEEN PLOTTED FROM THE BEST AVAILABLE INFORMATION. IT IS HOWEVER THE RESPONSIBILITY OF THE CONTRACTOR TO FIELD VERIFY THE LOCATION OF ALL UTILITIES PRIOR TO THE COMMENCEMENT OF ANY CONSTRUCTION ACTIVITIES. NOTE THIS DOCUMENT HAS BEEN RELEASED BY OLSSON ASSOCIATES ONLY FOR REVIEW BY REGULATORY AGENCIES AND OTHER PROFESSIONALS, AND IS SUBJECT TO CHANGE. THIS DOCUMENT IS NOT TO BE USED FOR CONSTRUCTION. ww w . o l s s o n . c o m TE L 9 7 0 . 4 6 1 . 7 7 3 3 Su i t e 2 0 0 Lo v e l a n d , C O 8 0 5 3 8 18 8 0 F a l l R i v e r D r i v e , UT I L I T Y P L A N S F O R LO T 3 , C O U N T R Y C L U B C O R N E R S 6 T H F I L I N G FO R T C O L L I N S , C O 20 2 4 021-04575 CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. CALL UTILITY NOTIFICATION CENTER OF COLORADO Know what'sbelow. before you dig.Call R 05.01.2024 32 SI T A N D S T A Y D O G B A R of DP TE RB DP SILT FENCE ORANGE CONSTRUCTION FENCE SLOPE DRAIN VEHICLE TRACKING CONTROL WATTLES STABILIZED STORAGE AREA SEEDING & MULCHING LIMIT OF DISTURBANCE EROSION CONTROL LEGEND SLOPE DIRECTION WHEEL ROLLED BERM INLET PROTECTION SEDIMENT BASIN EROSION CONTROL BLANKET STOCKPILE 5 ER O S I O N C O N T R O L P L A N S - P H A S E 1 C3.0 ROCK SOCK CONCRETE WASHOUT AREA CHART TABLE OF CALCULATIONS LOT 3 COUNTRY CLUB CORNERS 6TH FILING 110,722 SF LOT 2 COUNTRY CLUB CORNERS 6TH FILING 47,546 SF LOT 1 COUNTRY CLUB CORNERS 6TH FILING 47,579 SF LOT 2 COUNTRY CLUB CORNERS 5TH FILING PRIVATE PARKING LOT LOT 5 COUNTRY CLUB CORNERS THIRD FILING RE V I S I O N S NO . RE V . DA T E RE V I S I O N S D E S C R I P T I O N project no.: approved by: checked by: drawn by: drawing no.: QA/QC by: date: OLSSON ASSUMES NO RESPONSIBILITY FOR EXISTING UTILITY LOCATIONS (HORIZONTAL OR VERTICAL). THE EXISTING UTILITIES SHOWN ON THIS DRAWING HAVE BEEN PLOTTED FROM THE BEST AVAILABLE INFORMATION. IT IS HOWEVER THE RESPONSIBILITY OF THE CONTRACTOR TO FIELD VERIFY THE LOCATION OF ALL UTILITIES PRIOR TO THE COMMENCEMENT OF ANY CONSTRUCTION ACTIVITIES. NOTE THIS DOCUMENT HAS BEEN RELEASED BY OLSSON ASSOCIATES ONLY FOR REVIEW BY REGULATORY AGENCIES AND OTHER PROFESSIONALS, AND IS SUBJECT TO CHANGE. THIS DOCUMENT IS NOT TO BE USED FOR CONSTRUCTION. ww w . o l s s o n . c o m TE L 9 7 0 . 4 6 1 . 7 7 3 3 Su i t e 2 0 0 Lo v e l a n d , C O 8 0 5 3 8 18 8 0 F a l l R i v e r D r i v e , UT I L I T Y P L A N S F O R LO T 3 , C O U N T R Y C L U B C O R N E R S 6 T H F I L I N G FO R T C O L L I N S , C O 20 2 4 021-04575 CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. CALL UTILITY NOTIFICATION CENTER OF COLORADO Know what'sbelow. before you dig.Call R 05.01.2024 32 SI T A N D S T A Y D O G B A R of DP TE RB DP 6 ER O S I O N C O N T R O L P L A N S - P H A S E 2 C3.1 SILT FENCE ORANGE CONSTRUCTION FENCE SLOPE DRAIN VEHICLE TRACKING CONTROL WATTLES STABILIZED STORAGE AREA SEEDING & MULCHING LIMIT OF DISTURBANCE EROSION CONTROL LEGEND SLOPE DIRECTION WHEEL ROLLED BERM INLET PROTECTION SEDIMENT BASIN STOCKPILE ROCK SOCK CONCRETE WASHOUT AREA CHART TABLE OF CALCULATIONS RE V I S I O N S NO . RE V . DA T E RE V I S I O N S D E S C R I P T I O N project no.: approved by: checked by: drawn by: drawing no.: QA/QC by: date: OLSSON ASSUMES NO RESPONSIBILITY FOR EXISTING UTILITY LOCATIONS (HORIZONTAL OR VERTICAL). THE EXISTING UTILITIES SHOWN ON THIS DRAWING HAVE BEEN PLOTTED FROM THE BEST AVAILABLE INFORMATION. IT IS HOWEVER THE RESPONSIBILITY OF THE CONTRACTOR TO FIELD VERIFY THE LOCATION OF ALL UTILITIES PRIOR TO THE COMMENCEMENT OF ANY CONSTRUCTION ACTIVITIES. NOTE THIS DOCUMENT HAS BEEN RELEASED BY OLSSON ASSOCIATES ONLY FOR REVIEW BY REGULATORY AGENCIES AND OTHER PROFESSIONALS, AND IS SUBJECT TO CHANGE. THIS DOCUMENT IS NOT TO BE USED FOR CONSTRUCTION. ww w . o l s s o n . c o m TE L 9 7 0 . 4 6 1 . 7 7 3 3 Su i t e 2 0 0 Lo v e l a n d , C O 8 0 5 3 8 18 8 0 F a l l R i v e r D r i v e , UT I L I T Y P L A N S F O R LO T 3 , C O U N T R Y C L U B C O R N E R S 6 T H F I L I N G FO R T C O L L I N S , C O 20 2 4 021-04575 CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU DIG, GRADE, OR EXCAVATE FOR THE MARKING OF UNDERGROUND MEMBER UTILITIES. CALL UTILITY NOTIFICATION CENTER OF COLORADO Know what'sbelow. before you dig.Call R 05.01.2024 32 SI T A N D S T A Y D O G B A R of DP TE RB DP 7 ER O S I O N C O N T R O L P L A N S - P H A S E 3 C3.2 SILT FENCE ORANGE CONSTRUCTION FENCE SLOPE DRAIN VEHICLE TRACKING CONTROL WATTLES STABILIZED STORAGE AREA SEEDING & MULCHING LIMIT OF DISTURBANCE EROSION CONTROL LEGEND SLOPE DIRECTION WHEEL ROLLED BERM INLET PROTECTION SEDIMENT BASIN EROSION CONTROL BLANKET STOCKPILE ROCK SOCK CONCRETE WASHOUT AREA CHART TABLE OF CALCULATIONS SECTION 7 Control Measure Specification & Detail Sheets Control Measure Name Description Implementation Installation Procedures Inspection Expectations Describe the control measure and what pollutant sources it will provide effective treatment for (part I.C.2.a.iv of the permit). Include the mechanism used for treatment of the pollutant source. Describe how the control measure will be implemented in accordance with good engineering, hydrologic and pollution control practices. Include the phase(s) of construction the control measure will be implemented for. Describe the process required to install the control measure and have it adequately treat the intended pollutant source. Include specific depths, lengths, materials, and any other applicable information necessary to properly install the control measure. Describe how often the control measure will be inspected and what key features should be checked during each inspection (is the silt fence tail entrenched, are the straw wattles staked ever 4 feet, etc.) Control Measure Name Maintenance Requirements Control Measure Diagram Describe maintenance requirements, such as how to repair damaged sections, what qualifies as a failed control measure and when it needs to be replaced. Also include criteria that would trigger maintenance (i.e. 50% capacity of the control measure has been reached). Construction Phasing/Sequencing (CP) SM-1 November 2010 Urban Drainage and Flood Control District CP-1 Urban Storm Drainage Criteria Manual Volume 3 Photograph CP-1. Construction phasing to avoid disturbing the entire area at one time. Photo courtesy of WWE. Description Effective construction site management to minimize erosion and sediment transport includes attention to construction phasing, scheduling, and sequencing of land disturbing activities. On most construction projects, erosion and sediment controls will need to be adjusted as the project progresses and should be documented in the SWMP. Construction phasing refers to disturbing only part of a site at a time to limit the potential for erosion from dormant parts of a site. Grading activities and construction are completed and soils are effectively stabilized on one part of a site before grading and construction begins on another portion of the site. Construction sequencing or scheduling refers to a specified work schedule that coordinates the timing of land disturbing activities and the installation of erosion and sediment control practices. Appropriate Uses All construction projects can benefit from upfront planning to phase and sequence construction activities to minimize the extent and duration of disturbance. Larger projects and linear construction projects may benefit most from construction sequencing or phasing, but even small projects can benefit from construction sequencing that minimizes the duration of disturbance. Typically, erosion and sediment controls needed at a site will change as a site progresses through the major phases of construction. Erosion and sediment control practices corresponding to each phase of construction must be documented in the SWMP. Design and Installation BMPs appropriate to the major phases of development should be identified on construction drawings. In some cases, it will be necessary to provide several drawings showing construction-phase BMPs placed according to stages of development (e.g., clearing and grading, utility installation, active construction, final stabilization). Some municipalities in the Denver area set maximum sizes for disturbed area associated with phases of a construction project. Additionally, requirements for phased construction drawings vary among local governments within the UDFCD boundary. Some local governments require separate erosion and sediment control drawings for initial BMPs, interim conditions (in active construction), and final stabilization. Construction Scheduling Functions Erosion Control Moderate Sediment Control Moderate Site/Material Management Yes SM-1 Construction Phasing/Sequencing (CP) CP-2 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 Typical construction phasing BMPs include:  Limit the amount of disturbed area at any given time on a site to the extent practical. For example, a 100-acre subdivision might be constructed in five phases of 20 acres each.  If there is carryover of stockpiled material from one phase to the next, position carryover material in a location easily accessible for the pending phase that will not require disturbance of stabilized areas to access the stockpile. Particularly with regard to efforts to balance cut and fill at a site, careful planning for location of stockpiles is important. Typical construction sequencing BMPs include:  Sequence construction activities to minimize duration of soil disturbance and exposure. For example, when multiple utilities will occupy the same trench, schedule installation so that the trench does not have to be closed and opened multiple times.  Schedule site stabilization activities (e.g., landscaping, seeding and mulching, installation of erosion control blankets) as soon as feasible following grading.  Install initial erosion and sediment control practices before construction begins. Promptly install additional BMPs for inlet protection, stabilization, etc., as construction activities are completed. Table CP-1 provides typical sequencing of construction activities and associated BMPs. Maintenance and Removal When the construction schedule is altered, erosion and sediment control measures in the SWMP and construction drawings should be appropriately adjusted to reflect actual "on the ground" conditions at the construction site. Be aware that changes in construction schedules can have significant implications for site stabilization, particularly with regard to establishment of vegetative cover. Construction Phasing/Sequencing (CP) SM-1 November 2010 Urban Drainage and Flood Control District CP-3 Urban Storm Drainage Criteria Manual Volume 3 Table CP -1. Typical Phased BMP Installation for Construction Projects Project Phase BMPs Pre- disturbance, Site Access  Install sediment controls downgradient of access point (on paved streets this may consist of inlet protection).  Establish vehicle tracking control at entrances to paved streets. Fence as needed.  Use construction fencing to define the boundaries of the project and limit access to areas of the site that are not to be disturbed. Note: it may be necessary to protect inlets in the general vicinity of the site, even if not downgradient, if there is a possibility that sediment tracked from the site could contribute to the inlets. Site Clearing and Grubbing  Install perimeter controls as needed on downgradient perimeter of site (silt fence, wattles, etc).  Limit disturbance to those areas planned for disturbance and protect undisturbed areas within the site (construction fence, flagging, etc).  Preserve vegetative buffer at site perimeter.  Create stabilized staging area.  Locate portable toilets on flat surfaces away from drainage paths. Stake in areas susceptible to high winds.  Construct concrete washout area and provide signage.  Establish waste disposal areas.  Install sediment basins.  Create dirt perimeter berms and/or brush barriers during grubbing and clearing.  Separate and stockpile topsoil, leave roughened and/or cover.  Protect stockpiles with perimeter control BMPs. Stockpiles should be located away from drainage paths and should be accessed from the upgradient side so that perimeter controls can remain in place on the downgradient side. Use erosion control blankets, temporary seeding, and/or mulch for stockpiles that will be inactive for an extended period.  Leave disturbed area of site in a roughened condition to limit erosion. Consider temporary revegetation for areas of the site that have been disturbed but that will be inactive for an extended period.  Water to minimize dust but not to the point that watering creates runoff. SM-1 Construction Phasing/Sequencing (CP) CP-4 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 Project Phase BMPs Utility And Infrastructure Installation In Addition to the Above BMPs:  Close trench as soon as possible (generally at the end of the day).  Use rough-cut street control or apply road base for streets that will not be promptly paved.  Provide inlet protection as streets are paved and inlets are constructed.  Protect and repair BMPs, as necessary.  Perform street sweeping as needed. Building Construction In Addition to the Above BMPs:  Implement materials management and good housekeeping practices for home building activities.  Use perimeter controls for temporary stockpiles from foundation excavations.  For lots adjacent to streets, lot-line perimeter controls may be necessary at the back of curb. Final Grading In Addition to the Above BMPs:  Remove excess or waste materials.  Remove stored materials. Final Stabilization In Addition to the Above BMPs:  Seed and mulch/tackify.  Seed and install blankets on steep slopes.  Remove all temporary BMPs when site has reached final stabilization. Vehicle Tracking Control (VTC) SM-4 November 2010 Urban Drainage and Flood Control District VTC-3 Urban Storm Drainage Criteria Manual Volume 3 SM-4 Vehicle Tracking Control (VTC) VTC-4 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 Vehicle Tracking Control (VTC) SM-4 November 2010 Urban Drainage and Flood Control District VTC-5 Urban Storm Drainage Criteria Manual Volume 3 SM-4 Vehicle Tracking Control (VTC) VTC-6 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 Stabilized Staging Area (SSA) SM-6 November 2010 Urban Drainage and Flood Control District SSA-3 Urban Storm Drainage Criteria Manual Volume 3 SM-6 Stabilized Staging Area (SSA) SSA-4 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 Concrete Washout Area (CWA) MM-1 November 2010 Urban Drainage and Flood Control District CWA-3 Urban Storm Drainage Criteria Manual Volume 3 MM-1 Concrete Washout Area (CWA) CWA-4 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 Stockpile Management (SP) MM-2 November 2010 Urban Drainage and Flood Control District SP-3 Urban Storm Drainage Criteria Manual Volume 3 MM-2 Stockpile Management (SM) SP-4 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 Silt Fence (SF) SC-1 November 2010 Urban Drainage and Flood Control District SF-3 Urban Storm Drainage Criteria Manual Volume 3 SC-1 Silt Fence (SF) SF-4 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 SC-6 Inlet Protection (IP) IP-4 Urban Drainage and Flood Control District August 2013 Urban Storm Drainage Criteria Manual Volume 3 Inlet Protection (IP) SC-6 August 2013 Urban Drainage and Flood Control District IP-5 Urban Storm Drainage Criteria Manual Volume 3 SC-6 Inlet Protection (IP) IP-6 Urban Drainage and Flood Control District August 2013 Urban Storm Drainage Criteria Manual Volume 3 Inlet Protection (IP) SC-6 August 2013 Urban Drainage and Flood Control District IP-7 Urban Storm Drainage Criteria Manual Volume 3 SC-6 Inlet Protection (IP) IP-8 Urban Drainage and Flood Control District August 2013 Urban Storm Drainage Criteria Manual Volume 3 Vegetated Buffers (VB) SC-9 November 2010 Urban Drainage and Flood Control District VB-1 Urban Storm Drainage Criteria Manual Volume 3 Photograph VB-1. A vegetated buffer is maintained between the area of active construction and the drainage swale. Photo courtesy of WWE. Description Buffer strips of preserved natural vegetation or grass help protect waterways and wetlands from land disturbing activities. Vegetated buffers improve stormwater runoff quality by straining sediment, promoting infiltration, and slowing runoff velocities. Appropriate Uses Vegetated buffers can be used to separate land disturbing activities and natural surface waters or conveyances. In many jurisdictions, local governments require some type of setback from natural waterways. Concentrated flow should not be directed through a buffer; instead, runoff should be in the form of sheet flow. Vegetated buffers are typically used in combination with other perimeter control BMPs such as sediment control logs or silt fence for multi- layered protection. Design and Installation Minimum buffer widths may vary based on local regulations. Clearly delineate the boundary of the natural buffer area using construction fencing, silt fence, or a comparable technique. In areas that have been cleared and graded, vegetated buffers such as sod can also be installed to create or restore a vegetated buffer around the perimeter of the site. Maintenance and Removal Inspect buffer areas for signs of erosion such as gullies or rills. Stabilize eroding areas, as needed. If erosion is due to concentrated flow conditions, it may be necessary to install a level spreader or other technique to restore sheet flow conditions. Inspect perimeter controls delineating the vegetative buffer and repair or replace as needed. Vegetated Buffers Functions Erosion Control Moderate Sediment Control Yes Site/Material Management Yes Surface Roughening (SR) EC-1 November 2010 Urban Drainage and Flood Control District SR-3 Urban Storm Drainage Criteria Manual Volume 3 EC-1 Surface Roughening (SR) SR-4 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 Temporary and Permanent Seeding (TS/PS) EC-2 January 2021 Urban Drainage and Flood Control District TS/PS-1 Urban Storm Drainage Criteria Manual Volume 3 Description Temporary seeding can be used to stabilize disturbed areas that will be inactive for an extended period. Permanent seeding should be used to stabilize areas at final grade that will not be otherwise stabilized. Effective seeding includes preparing a seedbed, selecting an appropriate seed mixture, using proper planting techniques, and protecting the seeded area with mulch, geotextiles, or other appropriate measures. Appropriate Uses When the soil surface is disturbed and will remain inactive for an extended period (typically determined by local government requirements), proactive stabilization measures, including planting a temporary seed mix, should be implemented. If the inactive period is short-lived (on the order of two weeks), techniques such as surface roughening may be appropriate. For longer periods of inactivity of up to one year, temporary seeding and mulching can provide effective erosion control. Permanent seeding should be used on finished areas that have not been otherwise stabilized. The USDCM Volume 2 Revegetation Chapter contains suggested annual grains and native seed mixes to use for temporary seeding. Alternatively, local governments may have their own seed mixes and timelines for seeding. Check jurisdictional requirements for seeding and temporary stabilization. Design and Installation Effective seeding requires proper seedbed preparation, selecting an appropriate seed mixture, using appropriate seeding equipment to ensure proper coverage and density, and protecting seeded areas with mulch or fabric until plants are established. The USDCM Volume 2 Revegetation Chapter contains detailed seed mixes, soil preparation practices, and seeding and mulching recommendations that should be referenced to supplement this Fact Sheet. Drill seeding is the preferred seeding method. Hydroseeding is not recommended except in areas where steep slopes prevent use of drill seeding equipment, and even in these instances it is preferable to hand seed and mulch. Some jurisdictions do not allow hydroseeding or hydromulching. Seedbed Preparation Prior to seeding, ensure that areas to be revegetated have soil conditions capable of supporting vegetation. Overlot grading can result in loss of topsoil and compaction, resulting in poor quality subsoils at the ground surface that Temporary and Permanent Seeding Functions Erosion Control Yes Sediment Control No Site/Material Management No Photograph TS/PS -1. Equipment used to drill seed. Photo courtesy of Douglas County. EC-2 Temporary and Permanent Seeding (TS/PS) TS/PS-2 Urban Drainage and Flood Control District January 2021 Urban Storm Drainage Criteria Manual Volume 3 have low nutrient value, little organic matter content, few soil microorganisms, rooting restrictions, and conditions less conducive to infiltration of precipitation. As a result, it is typically necessary to provide stockpiled topsoil, compost, or other soil amendments and rototill them into the soil to a depth of 6 inches or more. Topsoil should be salvaged during grading operations for use and spread on areas to be revegetated later. Topsoil should be viewed as an important resource to be utilized for vegetation establishment, due to its water-holding capacity, structure, texture, organic matter content, biological activity, and nutrient content. The rooting depth of most native grasses in the semi-arid Denver metropolitan area is 6 to 18 inches. If present, at a minimum of the upper 6 inches of topsoil should be stripped, stockpiled, and ultimately respread across areas that will be revegetated. Where topsoil is not available, subsoils should be amended to provide an appropriate plant-growth medium. Organic matter, such as well digested compost, can be added to improve soil characteristics conducive to plant growth. Other treatments can be used to adjust soil pH conditions when needed. Soil testing, which is typically inexpensive, should be completed to determine and optimize the types and amounts of amendments that are required. If the disturbed ground surface is compacted, rip or rototill the upper 12 inches of the surface prior to placing topsoil. If adding compost to the existing soil surface, rototilling is necessary. Surface roughening will assist in placing a stable topsoil layer on steeper slopes, and allow infiltration and root penetration to greater depth. Topsoil should not be placed when either the salvaged topsoil or receiving ground are frozen or snow covered. Prior to seeding, the soil surface should be rough and the seedbed should be firm, but neither too loose nor compacted. The upper layer of soil should be in a condition suitable for seeding at the proper depth and conducive to plant growth. Seed-to-soil contact is the key to good germination. Refer to MHFD’s Topsoil Management Guidance for detailed information on topsoil assessment, design, and construction. Temporary Vegetation To provide temporary vegetative cover on disturbed areas which will not be paved, built upon, or fully landscaped or worked for an extended period (typically 30 days or more), plant an annual grass appropriate for the time of planting and mulch the planted areas. Temporary grain seed mixes suitable for the Denver metropolitan area are listed in Table TS/PS-1. Native temporary seed mixes are provided in USDCM Volume 2, Chapter 13, Appendix A. These are to be considered only as general recommendations when specific design guidance for a particular site is not available. Local governments typically specify seed mixes appropriate for their jurisdiction. Permanent Revegetation To provide vegetative cover on disturbed areas that have reached final grade, a perennial grass mix should be established. Permanent seeding should be performed promptly (typically within 14 days) after reaching final grade. Each site will have different characteristics and a landscape professional or the local jurisdiction should be contacted to determine the most suitable seed mix for a specific site. In lieu of a specific recommendation, one of the perennial grass mixes appropriate for site conditions and growth season listed in seed mix tables in the USDCM Volume 2 Revegetation Chapter can be used. The pure live seed (PLS) rates of application recommended in these tables are considered to be absolute minimum rates for seed applied using proper drill-seeding equipment. These are to be considered only as general Temporary and Permanent Seeding (TS/PS) EC-2 January 2021 Urban Drainage and Flood Control District TS/PS-3 Urban Storm Drainage Criteria Manual Volume 3 recommendations when specific design guidance for a particular site is not available. Local governments typically specify seed mixes appropriate for their jurisdiction. If desired for wildlife habitat or landscape diversity, shrubs such as rubber rabbitbrush (Chrysothamnus nauseosus), fourwing saltbush (Atriplex canescens) and skunkbrush sumac (Rhus trilobata) could be added to the upland seed mixes at 0.25, 0.5 and 1 pound PLS/acre, respectively. In riparian zones, planting root stock of such species as American plum (Prunus americana), woods rose (Rosa woodsii), plains cottonwood (Populus sargentii), and willow (Salix spp.) may be considered. On non-topsoiled upland sites, a legume such as Ladak alfalfa at 1 pound PLS/acre can be included as a source of nitrogen for perennial grasses. Timing of seeding is an important aspect of the revegetation process. For upland and riparian areas on the Colorado Front Range, the suitable timing for seeding is from October through May. The most favorable time to plant non-irrigated areas is during the fall, so that seed can take advantage of winter and spring moisture. Seed should not be planted if the soil is frozen, snow covered, or wet. Seeding dates for the highest success probability of perennial species along the Front Range are generally in the spring from April through early May and in the fall after the first of September until the ground freezes. If the area is irrigated, seeding may occur in summer months, as well. See Table TS/PS-2 for appropriate seeding dates. EC-2 Temporary and Permanent Seeding (TS/PS) TS/PS-4 Urban Drainage and Flood Control District January 2021 Urban Storm Drainage Criteria Manual Volume 3 Table TS/PS-1. Minimum Drill Seeding Rates for Various Temporary Annual Grasses Speciesa (Common name) Growth Seasonb Pounds of Pure Live Seed (PLS)/acrec Planting Depth (inches) 1. Oats Cool 35 - 50 1 - 2 2. Spring wheat Cool 25 - 35 1 - 2 3. Spring barley Cool 25 - 35 1 - 2 4. Annual ryegrass Cool 10 - 15 ½ 5. Millet Warm 3 - 15 ½ - ¾ 6. Winter wheat Cool 20–35 1 - 2 7. Winter barley Cool 20–35 1 - 2 8. Winter rye Cool 20–35 1 - 2 9. Triticale Cool 25–40 1 - 2 a Successful seeding of annual grass resulting in adequate plant growth will usually produce enough dead-plant residue to provide protection from wind and water erosion for an additional year. This assumes that the cover is not disturbed or mowed closer than 8 inches. Hydraulic seeding may be substituted for drilling only where slopes are steeper than 3:1 or where access limitations exist. When hydraulic seeding is used, hydraulic mulching should be applied as a separate operation, when practical, to prevent the seeds from being encapsulated in the mulch. b See Table TS/PS-2 for seeding dates. Irrigation, if consistently applied, may extend the use of cool season species during the summer months. c Seeding rates should be doubled if seed is broadcast, or increased by 50 percent if done using a Brillion Drill or by hydraulic seeding. Temporary and Permanent Seeding (TS/PS) EC-2 January 2021 Urban Drainage and Flood Control District TS/PS-5 Urban Storm Drainage Criteria Manual Volume 3 Table TS/PS-2. Seeding Dates for Annual and Perennial Grasses Annual Grasses (Numbers in table reference species in Table TS/PS-1) Perennial Grasses Seeding Dates Warm Cool Warm Cool January 1–March 15   March 16–April 30 1,2,3   May 1–May 15  May 16–June 30 5 July 1–July 15 5 July 16–August 31 September 1–September 30 6, 7, 8, 9 October 1–December 31   Mulch Cover seeded areas with mulch or an appropriate rolled erosion control product to promote establishment of vegetation. Anchor mulch by crimping, netting or use of a non-toxic tackifier. See the USDCM Volume 2 Revegetation Chapter and Volume 3 Mulching BMP Fact Sheet (EC-04) for additional guidance. Maintenance and Removal Monitor and observe seeded areas to identify areas of poor growth or areas that fail to germinate. Reseed and mulch these areas, as needed. If a temporary annual seed was planted, the area should be reseeded with the desired perennial mix when there will be no further work in the area. To minimize competition between annual and perennial species, the annual mix needs time to mature and die before seeding the perennial mix. To increase success of the perennial mix, it should be seeded during the appropriate seeding dates the second year after the temporary annual mix was seeded. Alternatively, if this timeline is not feasible, the annual mix seed heads should be removed and then the area seeded with the perennial mix. An area that has been permanently seeded should have a good stand of vegetation within one growing season if irrigated and within three growing seasons without irrigation in Colorado. Reseed portions of the site that fail to germinate or remain bare after the first growing season. Seeded areas may require irrigation, particularly during extended dry periods. Targeted weed control may also be necessary. Protect seeded areas from construction equipment and vehicle access. Mulching (MU) EC-4 June 2012 Urban Drainage and Flood Control District MU-1 Urban Storm Drainage Criteria Manual Volume 3 Photograph MU-1. An area that was recently seeded, mulched, and crimped. Description Mulching consists of evenly applying straw, hay, shredded wood mulch, rock, bark or compost to disturbed soils and securing the mulch by crimping, tackifiers, netting or other measures. Mulching helps reduce erosion by protecting bare soil from rainfall impact, increasing infiltration, and reducing runoff. Although often applied in conjunction with temporary or permanent seeding, it can also be used for temporary stabilization of areas that cannot be reseeded due to seasonal constraints. Mulch can be applied either using standard mechanical dry application methods or using hydromulching equipment that hydraulically applies a slurry of water, wood fiber mulch, and often a tackifier. Appropriate Uses Use mulch in conjunction with seeding to help protect the seedbed and stabilize the soil. Mulch can also be used as a temporary cover on low to mild slopes to help temporarily stabilize disturbed areas where growing season constraints prevent effective reseeding. Disturbed areas should be properly mulched and tacked, or seeded, mulched and tacked promptly after final grade is reached (typically within no longer than 14 days) on portions of the site not otherwise permanently stabilized. Standard dry mulching is encouraged in most jurisdictions; however, hydromulching may not be allowed in certain jurisdictions or may not be allowed near waterways. Do not apply mulch during windy conditions. Design and Installation Prior to mulching, surface-roughen areas by rolling with a crimping or punching type roller or by track walking. Track walking should only be used where other methods are impractical because track walking with heavy equipment typically compacts the soil. A variety of mulches can be used effectively at construction sites. Consider the following: Mulch Functions Erosion Control Yes Sediment Control Moderate Site/Material Management No EC-4 Mulching (MU) MU-2 Urban Drainage and Flood Control District June 2012 Urban Storm Drainage Criteria Manual Volume 3  Clean, weed-free and seed-free cereal grain straw should be applied evenly at a rate of 2 tons per acre and must be tacked or fastened by a method suitable for the condition of the site. Straw mulch must be anchored (and not merely placed) on the surface. This can be accomplished mechanically by crimping or with the aid of tackifiers or nets. Anchoring with a crimping implement is preferred, and is the recommended method for areas flatter than 3:1. Mechanical crimpers must be capable of tucking the long mulch fibers into the soil to a depth of 3 inches without cutting them. An agricultural disk, while not an ideal substitute, may work if the disk blades are dull or blunted and set vertically; however, the frame may have to be weighted to afford proper soil penetration.  Grass hay may be used in place of straw; however, because hay is comprised of the entire plant including seed, mulching with hay may seed the site with non-native grass species which might in turn out-compete the native seed. Alternatively, native species of grass hay may be purchased, but can be difficult to find and are more expensive than straw. Purchasing and utilizing a certified weed-free straw is an easier and less costly mulching method. When using grass hay, follow the same guidelines as for straw (provided above).  On small areas sheltered from the wind and heavy runoff, spraying a tackifier on the mulch is satisfactory for holding it in place. For steep slopes and special situations where greater control is needed, erosion control blankets anchored with stakes should be used instead of mulch.  Hydraulic mulching consists of wood cellulose fibers mixed with water and a tackifying agent and should be applied at a rate of no less than 1,500 pounds per acre (1,425 lbs of fibers mixed with at least 75 lbs of tackifier) with a hydraulic mulcher. For steeper slopes, up to 2000 pounds per acre may be required for effective hydroseeding. Hydromulch typically requires up to 24 hours to dry; therefore, it should not be applied immediately prior to inclement weather. Application to roads, waterways and existing vegetation should be avoided.  Erosion control mats, blankets, or nets are recommended to help stabilize steep slopes (generally 3:1 and steeper) and waterways. Depending on the product, these may be used alone or in conjunction with grass or straw mulch. Normally, use of these products will be restricted to relatively small areas. Biodegradable mats made of straw and jute, straw-coconut, coconut fiber, or excelsior can be used instead of mulch. (See the ECM/TRM BMP for more information.)  Some tackifiers or binders may be used to anchor mulch. Check with the local jurisdiction for allowed tackifiers. Manufacturer's recommendations should be followed at all times. (See the Soil Binder BMP for more information on general types of tackifiers.)  Rock can also be used as mulch. It provides protection of exposed soils to wind and water erosion and allows infiltration of precipitation. An aggregate base course can be spread on disturbed areas for temporary or permanent stabilization. The rock mulch layer should be thick enough to provide full coverage of exposed soil on the area it is applied. Maintenance and Removal After mulching, the bare ground surface should not be more than 10 percent exposed. Reapply mulch, as needed, to cover bare areas. SECTION 8 Log of Revisions (optional) Permittees must keep a record of SWMP changes made that includes the date and identification of the changes. The SWMP must be amended when the following occurs: • A change in design, construction, operation, or maintenance of the site requiring implementation of new or revised control measures; • The SWMP proves ineffective in controlling pollutants in stormwater runoff in compliance with the permit conditions; • Control measures identified in the SWMP are no longer necessary and are removed; • Corrective actions are taken onsite that result in a change to the SWMP. For SWMP revisions made prior to or following a change(s) onsite, including revisions to sections addressing site conditions and control measures, a notation must be included in the SWMP that identifies the date of the site change, the control measure removed, or modified, the location(s) of those control measures, and any changes to the control measure(s). The permittee must ensure the site changes are reflected in the SWMP. The permittee is noncompliant with the permit until the SWMP revisions have been made (CDPHE 2019). This log may be used in conjunction with the SWMP Tracking Map located in Section 6 or the map alone may be used to track this information. Log of Revisions Revision No. Description of the Revision Date Implemented SECTION 9 Local Regulations & Additional Permits Local Ordinances can be located here for reference only. Additional permits (i.e. 404, NWP, grading permits if required, etc.) can be kept here for reference only. SECTION 10 Low Risk Discharge Guidance Spill Report forms can be found in this section.  4300 Cherry Creek Drive S., Denver, CO 80246-1530 P 303-692-2000 www.colorado.gov/cdphe/wqcd John W. Hickenlooper, Governor | Larry Wolk, MD, MSPH, Executive Director and Chief Medical Officer     Dedicated to protecting and improving the health and environment of the people of Colorado Low Risk Discharge Guidance Discharges of Uncontaminated Groundwater to Land Originally Issued September 2009 Revised August 8, 2017     Table of Contents Scope and Purpose of Modification…………….. Page 1  Background and Discussion…………………………. Page 1  Criteria, Conditions, and Control Measures…. Page 2  Alternative Disposal Options……………………….. Page 4    Scope and Purpose of Modification   This revised guidance document is effective August 4, 2017. In addition to organizational and editorial revisions, the following substantive modifications were made:  Additional information was added regarding determining if the discharge is uncontaminated. Refer to the Criteria section.  Removed the reference to solid waste permitting in the background and discussion portion of the document. Uncontaminated groundwater would typically not be regulated as a solid waste, and therefore the discussion was not likely to be applicable to discharges covered by this guidance. However, it remains the responsible parties’ obligation to ensure compliance with other applicable laws and regulations, including solid waste requirements.  The requirement that the discharge be returned to the same aquifer that it was drawn from was added. This is consistent with the intent of the original version, as identified by the examples of covered discharges provided: construction dewatering, subterranean or foundation dewatering, uncontaminated vault dewatering, and utility work. Background and Discussion   This discharge policy guidance has been developed in accordance with WQP-27, Low Risk Discharges Policy. This guidance is only applicable to discharges meeting the low risk discharge criteria and conditions identified below. Refer to the Alternative Disposal Options section at the end of this document for additional information for discharges that do not meet the criteria and conditions of this guidance. The division has issued general permits for point source discharges of groundwater to land, as identified in the Alternative Disposal Options section. However, for the category of point source discharges that meet the criteria and conditions outlined in this document, the division has determined it is appropriate to manage the discharges through the development of guidance instead of through pursuing permit coverage. When the criteria and provisions of this guidance are met, the division will not actively pursue permitting or enforcement for discharges of groundwater to land, unless on a case-by-case basis, the division finds that a discharge has resulted in an adverse impact to the quality of any state waters receiving the discharge. Discharges of uncontaminated groundwater to land that are typically associated with short term or intermittent Page 2 of 4   discharges are not expected to contain pollutants in concentrations that are toxic, or in concentrations that would cause or contribute to a violation of a water quality standard for ground water. A large number of these types of discharges occur state-wide every year, which requires a resource-intensive effort to permit without a resulting general benefit to environmental quality in the vast majority of situations. Discharges of uncontaminated groundwater to land that may be covered under this guidance document when all the provisions in the document are adhered to may include, but are not limited to: construction dewatering, subterranean or foundation dewatering, uncontaminated vault dewatering, and utility work.   Criteria, Conditions, and Control Measures  Definitions  Control Measures: are any best management practice or other method used to prevent or reduce the discharge of pollutants to waters of the state.    Low Risk Discharge Criteria   This guidance is applicable to point source discharges that meet the following criteria and that meet the conditions listed in the next section. Refer to the Alternative Disposal Options section for guidance on addressing water not meeting these criteria.  The source of the discharge must solely be uncontaminated groundwater or uncontaminated groundwater combined with stormwater. Refer to the guidance in the Control Measure section below for information on identifying potentially contaminated groundwater.  To be considered uncontaminated, the source ground water must not contain pollutants in concentrations that exceed water quality standards for groundwater applicable to the receiving groundwater. For ground water for which standards have not already been assigned in Regulation 42, Site-Specific Water Quality Classifications and Standards for Ground Water (5 CCR 1002-42), pollutants shall not exceed the criteria set forth in Tables 1 through 4 of “The Basic Standards for Ground Water,” in Regulation 41, The Basic Standards for Ground Water (5 CCR 1002-41). This guidance does not include consideration of criteria for groundwater based on existing ambient quality as of January 31, 1994, as set forth in Regulation No. 41.5.C.6.b.i(A). Becaus e a site-specific evaluation and determination is necessary for application of such criteria, the division has determined that consideration of this allowance is not appropriate under this guidance. The source groundwater must be from the same aquifer that the water will be returned to. Specifically, this guidance is not applicable to discharges from deep wells that draw water from confined aquifers which will often have substantially different water quality compositions than the shallower unconfined aquifers to which the water will be discharged.  The discharge must be to land. Point source discharges to surface waters of the state, storm sewers, or other drainage conveyance systems are not covered by this guidance.    Conditions   The following conditions must be met by anyone discharging wastewater in accordance with this guidance:  Prohibition of pollutants in the discharge: • No chemicals may be added. • If the discharge is from vaults or similar structures, the discharge cannot be contaminated by process materials used, stored, or conveyed in the structures, or by introduced surface water runoff from outside environments that may contain oil, grease, and corrosives. • A visible sheen must not be evident in the source water or discharge.  Exclusion of Process Discharges: • The groundwater shall not be used in any additional processes. Processes include, but are not limited to, any type of washing, heat exchange, or manufacturing.  Controlling the discharge: • The groundwater discharge cannot leave the operational control of the entity administering the land application. The owner of the property where the discharge is occurring must have prior knowledge and grant permission for the land application. • Land application must be conducted at a rate and location that does not allow for any runoff into state waters or other drainage conveyance systems, including but not limited to streets, curb and Page 3 of 4   gutter, inlets, borrow ditches, open channels etc. If the land application is to agricultural land, it must not reach or have the potential to reach an agricultural ditch. Discharges to drainage conveyance systems as described above are a discharge to surface water that require a discharge permit and are not covered under this guidance document. • Land application must be conducted at a rate that does not allow for any ponding of the groundwater on the surface, unless the ponding is a result of implementing control measures that are designed to reduce flow velocity. If the control measures used result in ponding, the land application must be done in an area with a cons tructed containment, such as an excavation or bermed area with no designed outfall. The constructed containment shall prevent the discharge of the ponding water offsite as runoff.  Compliance with construction stormwater discharge permits: If the discharge is located at a facility covered by a CDPS General Permit for Stormwater Discharge Associated with Construction Activities, the requirements in that permit associated with the discharge of groundwater must be complied with, including identification in the Stormwater Management Plan.  Controlling erosion: The discharge shall not cause erosion of a land surface that could cause pollution of the receiving water. Signs of visible erosion that have the potential to cause pollution without downstream controls measures implemented include the formation of rills or gullies on the land surface. Energy dissipation devices designed to protect downstream areas from erosion by reducing velocity of flow (such as hose attachments and erosion controls) may be necessary to prevent erosion.  Controlling pollutant potential of deposited sediment: Control measures shall be implemented to prevent any sediment deposited during land application from being transported by stormwater runoff to surface waters or other conveyances.  Additional Requirements and Property Rights: • All discharges must comply with the lawful requirements of federal agencies, municipalities, counties, drainage districts, ditch owners, and other local agencies regarding any discharges to storm drain systems, conveyances, ditches or other water courses under their jurisdiction. • The guidance included in this document in no way reduces the existing authority of the owner of a storm sewer, ditch owner, or other local agency, from prohibiting or placing additional conditions on the discharge. • The discharge shall not result in flooding of neighboring property, streets, gutters or storm sewers. The discharge must be diverted from building foundations or other areas that may be damaged from ground settling or swelling.    Implementation of Control Measures Control measures should be implemented as necessary to meet the conditions above, by anyone discharging in accordance with this guidance. The following control measures have been developed by the division to help ensure that the discharge will not negatively affect water quality. Refer to the Alternative Disposal Options section for guidance where these control measures cannot be implemented.    Identifying potentially contaminated groundwater: It the groundwater is located within 1 mile of a landfill, abandoned landfill, mine or mine tailing area, a Leaking Underground Storage Tank (LUST), Brownfield site, or other area of contamination, there is an increased likelihood that groundwater contamination exists. In those cases additional work is appropriate to determine if your dewatering area is in an area of contamination. The following is a list of contamination and plume resources and is helpful when determining if your dewatering area is in an area of contamination, however the list is not all inclusive and in some cases site-specific characterization of groundwater may be necessary. CDPHE Environmental Cleanup Web Page (refer to the resources under “sites and facilities”): https://www.colorado.gov/pacific/cdphe/categories/services-and- information/environment/environmental-cleanup#sites EPA Cleanups in My Community Maps and Lists: https://www.epa.gov/cleanups/cleanups-my-community Page 4 of 4    All control measures used to meet the provisions of this guidance document must be selected, installed, implemented and maintained according to good engineering, hydrologic and pollution control practices. These control measures must be adequately designed to provide control for all potential pollutant sources associated with the discharge of uncontaminated groundwater to land.  The discharge should be routed in such a way that it will not contact petroleum products/waste, a visible sheen must not be evident in the discharge.  To minimize potential for creating stormwater pollution sources, control measures (such as a filter bag or similar filtration device) should be used to remove sediment/solids prior to land application.   Alternative Disposal Options   Water that does not meet the criteria of this guidance or that cannot be discharged in a manner that meets the conditions of this guidance must be either authorized by a Colorado Discharge Permit System (CDPS) discharge permit issued by the division or disposed of through an alternative means.   The Water Quality Control Division has general permits available for discharges to surface water and/or land associated with construction dewatering, subterranean structure/foundation dewatering, and the remediation of groundwater. Obtaining coverage one of these permits will likely be the most efficient solution for discharges that do not meet the criteria and conditions of this guidance. For discharges associated with construction projects, guidance on determining the appropriate permit and applying in included in the Application Guidance Document fo r these general permits, available on the division’s construction sector permitting page: https://www.colorado.gov/pacific/cdphe/wq-construction-general-permits Discharges from subterranean structures (basement, foundation, footer drains, etc.) are covered by the Subterranean Dewatering or Well Development general permit. The application and other information for this general permit can be found on the commerce and industry sector permitting page: https://www.colorado.gov/pacific/cdphe/clean-water-commerce-and-industry-permitting For more information, contact the Water Quality Control Division’s Permitting Section or Clean Water Compliance Unit, at (303) 692-3517. LOW RISK DISCHARGE GUIDANCE: DISCHARGES FROM SURFACE COSMETIC POWER WASHING OPERATIONS TO LAND JULY 2010 (Last Revised May 2023) This discharge guidance has been developed in accordance with the WQP-27, Low Risk Discharges and addresses the discharge of surface cosmetic power wash wastewater (wastewater) to land, i.e., permeable areas. The Division has not developed a general permit for this type of discharge, and is instead managing the discharge through the development of guidance. When the provisions of this guidance are met, the Division will not actively pursue permitting or enforcement for this category of discharges, unless on a case-by-case basis the Division finds that a discharge has resulted in pollution or degradation of state waters. This low risk guidance replaces the Division’s current power washing guidance document. Surface cosmetic power washing (power washing) is the washing of surfaces exposed to precipitation, through the application of water only, and includes the use of transportable equipment to wash various surfaces. Discharges to land from power washing are a type of industrial activity that are typically short term and of small volume that, with proper management, are not expected to contain pollutants in concentrations that are toxic or in concentrations that would cause or contribute to a violation of a groundwater water quality standard. A large number of these types of discharges occur state-wide every day. Permitting these discharges is resource intensive and does not result in a clear general benefit to environmental quality. Discharges from power washing operations to surface waters, including irrigation ditches, are not included in the scope of this guidance document. This includes discharges that reach surface waters either directly or through conveyance systems. Conveyance systems include but are not limited to streets, curb and gutter, inlets, ditches, open channels, etc. The Division is evaluating these discharges separately because they pose a significantly greater potential for causing or contributing to a violation of a surface water quality standards. This is because the transport pathway for these discharges is much more direct and the pollutant potential is higher relative to the more stringent standards for aquatic life that apply. The following conditions must be met by anyone discharging power washing wastewater to land: The discharges shall only be from the washing of surfaces exposed to precipitation such as building exteriors, outdoor parking lots, sidewalks, patio areas, and exteriors of vehicles (except for vehicles beds, chutes, or other surfaces used for containing or transferring materials). The discharge shall not be from washing activities associated with spills that require reporting pursuant to 25-8-601(2), C.R.S. Refer to Division Policy WQE-10 for additional information. The Policy is available online at www.cdphe.state.co.us/wq/WhatsNew/SpillGuidanceDocument.pdf or by contacting the Division. Discharges to permeable stormwater conveyances such as swales and dry detention basins is allowed only when the following additional requirements can be met: o The permeable conveyance is designed to handle the amount of water being discharged and all water shall soak into the permeable area, i.e. cannot be conveyed or transported to surface water during future storm events. o No standing or flowing water can be in the permeable conveyance at the time of discharge. • • • COLORADO Department of Public Health & Environm,ent o This provision does not apply to irrigation ditches including dry irrigation ditches, as irrigation ditches are considered unclassified state waters. o Discharges to permeable stormwater conveyances must meet all other conditions of this guidance. All water shall soak into the land. The addition of chemicals and detergents to the wash water or to the discharge is strictly prohibited. Floating or solid materials shall not be evident in the discharge. A visible sheen shall not be evident in the discharge. The discharge shall not be harmful to vegetation. The discharge shall not cause erosion of a land surface. The discharge shall not occur during a stormwater runoff event. The wastewater may reach the street, curb flow line, impermeable channels, or other open impermeable areas provided that it remains in the operators’ control and is immediately collected (including all deposited pollutants) for discharge in accordance with all conditions of this guidance. o All discharges must comply with the lawful requirements of federal agencies, municipalities, counties, drainage districts, and other local agencies regarding any discharges to storm drain systems, conveyances, or other water courses under their jurisdiction. The following Best Management Practices (BMPs) should be followed, as necessary, by anyone discharging power washing wastewater to land. These BMPs have been developed by the Division to help ensure that the discharge will not negatively affect water quality. All BMPs used to meet the provisions of this guidance document must be selected, installed, implemented and maintained according to good engineering, hydrologic and pollution control practices. These BMPs must be adequately designed to provide control for all potential pollutant sources associated with the discharge of power washing wastewater to land. Solids and any pooled liquids other than stormwater should be removed from the surface to be cleaned prior to power washing. A filter bag or similar filtration device should be used to remove any suspended solids. This device should be used and maintained in accordance with the manufacturers specifications. An absorbent oil pad, boom or similar device should be used to eliminate any oil from the discharge water. The discharge should be applied at a rate to minimize ponding so there is no potential for the water to flow to a surface water. The following are alternatives to discharging under this guidance and are options for disposing of power washing wastewater: Contact the local wastewater treatment facility to determine whether or not discharge of the wash water to the sanitary sewer system is allowed. If discharge to the sanitary sewer is approved by the wastewater treatment facility, collect the wash water and send it to the sanitary sewer system in accordance with the requirements of the wastewater treatment facility. Collect the wash water and dispose of it appropriately at a disposal facility. Remove solids and any pooled liquids prior to washing, fully contain the wash water on an impervious area, and allow it to completely evaporate. This activity must be conducted under the control of the operator, and in a manner that prevents any potential discharge to a storm sewer or other conveyance to a surface water. Apply for coverage under a CDPS Individual Permit. Contact Information: For more information, contact the Water Quality Control Division’s Permitting Section or Clean Water Compliance Unit, at (303) 692-3517. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. LOW RISK DISCHARGE GUIDANCE: DISCHARGES FROM SNOW MELTING MACHINES JUNE 2008 (Last Revised May 2023) This discharge guidance has been developed in accordance with Water Quality Policy-27, Low Risk Discharges. The Division has not developed a general permit for this category of discharges, and is instead managing the discharge through the development of guidance. When the provisions of this guidance are met, the Division will not actively pursue permitting or enforcement for the discharge of snow melt water, unless on a case-by-case basis the Division finds that a discharge has caused an adverse impact to the quality of any state waters receiving the discharge. Snow melting activities are a type of industrial activity that are typically associated with short term discharges that are not expected to contain pollutants in concentrations that are toxic or in concentrations that would cause or contribute to a violation of a water quality standard. Snow melting activities include the use of fixed and transportable commercial equipment to melt snow, through the application of heat. Chemicals and other pollutants are not added in this process, and the discharged water typically reflects the quality of the snow with a slightly higher temperature (1° – 9°C). A large number of these types of discharges occur state-wide every winter, which require a resource intensive effort to permit, without resulting in a clear general benefit to environmental quality. The following items must be followed by anyone discharging snow melt water: •Snow may not be pushed, piled, or otherwise moved, directly into a river, lake or other surface water. •The addition of cleaning materials or chemicals (such as deicers) during snow melting activities is strictly prohibited. •All discharges must comply with the lawful requirements of federal agencies, municipalities, counties, drainage districts, and other local agencies regarding any discharges to storm drain systems, conveyances, or other water courses under their jurisdiction. In addition, if the discharge is to a storm sewer, prior to discharge the owner/operator must notify the owner of the conveyance system of the date, approximate time, location, and duration of the discharge(s). The guidance included in this document in no way reduces the existing authority of the owner of a storm sewer, or other local agency, from prohibiting or placing additional conditions on the discharge. •The discharge shall not result in flooding of neighboring property, streets, gutters or storm sewers. •The discharge must be diverted from building foundations or other areas that may be damaged from ground settling or swelling. •The discharge must be visibly clear and not contain floating or solid materials. •A visible sheen must not be evident in the discharge. BMPs should be implemented as necessary to meet the conditions above, by anyone discharging wastewater resulting from snow melting activities. These BMPs have been developed by the Division to help ensure that the discharge will not negatively affect water quality. COLORADO Department of Public Health .s, Envi ronment BMPs for Discharge to Groundwater (discharge is to the ground through the soil or a rock pit,where the discharge will not flow overland directly into a surface water,storm sewer or similar conveyance). •If any of the snow being melted is from a parking lot,street,or other paved area with vehicle traffic,an absorbent oil pad,boom or similar device should be used to eliminate oil from the discharge water. BMPs for Discharge to Storm Sewers or Surface Waters (pollutants can impact or damage the health of the receiving waters,aquatic life,humans and animals.Storm sewers are connected to lakes,rivers,creeks and other waters). •The temperature of the discharge water should be below 9ºC (48ºF). •A filter bag or similar filtration device should be used to remove suspended solids.This device should be used and maintained in accordance with the manufacturers specifications.Settling ponds may be used if there is sufficient residence time to settle out all suspended solids. •If any of the snow being melted is from a parking lot,street,or other paved area with vehicle traffic,or if a visible sheen is noticed,an absorbent oil pad,boom or similar device should be used to eliminate any oil from the discharge water. •The discharge and associated runoff should be routed so that it does not cause any erosion. Contact Information: For more information,contact the Water Quality Control Division’s Permitting Section or Clean Water Compliance Unit,at (303)692-3517. Page 1 of 6 Dedicated to protecting and improving the health and environment of the people of Colorado Low Risk Discharge Guidance Discharges from Pools, Fountains and Other Similar Type Facilities that are Fed by Natural Hot Springs January 2015 This discharge guidance has been developed in accordance with Water Quality Policy-27, Low Risk Discharges. This guidance is only applicable to discharges meeting the low risk discharge criteria identified below. The division has not developed a general permit for this category of dischargers, and is instead managing the discharge through the development of guidance. When the criteria and provisions of this guidance are met, the division will not actively pursue permitting or enforcement for discharges from swimming pools, hot tubs, decorative fountains, and other similar type facilities that are fed by natural hot springs, unless on a case-by-case basis the division finds that a discharge has resulted in an adverse impact to the quality of any state waters receiving the discharge. Discharges from flow-through pools/spas fed by natural hot springs that meet the criteria outlined in this guidance are not expected to contain pollutants in concentrations that are toxic, or in concentrations that would cause or contribute to a violation of a water quality standard. A large number of these types of discharges occur state-wide every year, which requires a resource- intensive effort to permit, without resulting in a clear general benefit to environmental quality in the vast majority of situations. The implementation of this guidance document does not constitute a water right. Questions regarding water rights should be directed to the State Engineers office at: (303)866-3581. The criteria provided in this guidance must be met, and all of these conditions must be followed, by anyone claiming to discharge under this low risk guidance. Definitions  Control measures: “Control measures” are any best management practice or other method used to prevent or reduce the discharge of pollutants to waters of the state. Control measures include, but are not limited to best management practices.  HS Facilities: In this document, “HS Facilities” is limited to flow-through recreational swimming and bathing pools, hot tubs, decorative fountains, and other similar type recreational or decorative facilities fed by natural hot springs.  Natural hot springs: Natural hot springs are waters that are expected to surface in the vicinity of the HS Facility under natural conditions, regardless of the presence of the HS Facility or the activities conducted by the facility. A discharge will be considered to be “in Page 2 of 6 Dedicated to protecting and improving the health and environment of the people of Colorado the vicinity” of the natural outflow if it is to the same stream that would have received the hot spring flow under natural conditions and in the same general area that would have been affected by the natural flow of the hot springs. Note that waters that are abstracted (pumped or drawn) from wells (as defined below) are not surfacing under natural conditions and do not meet the definition of natural hot springs.  Potable water: Water suitable for human consumption in accordance with Colorado Primary Drinking Water Regulations (5 CCR 1002‐11), or water intended for human consumption from a public or private supply system not subject to 5 CCR 1002‐11.2.  Wastewater: In this document, “wastewater” refers to any water discharged by a HS Facility where pollutants are being introduced or added through the facility’s operations.  Wells: In this document, the definition of “well” is based on the definition provided in the Code of Colorado Regulations, Article 91. Water Well construction and Pump Installation Contractors (CRS 37-91-102, Part 16(a); Part 16(b)(I), and Part 16 (b)(II)). As described therein, “well" means any test hole or other excavation that is drilled, cored, bored, washed, fractured, driven, dug, jetted, or otherwise constructed for the purpose of location, monitoring, dewatering, observation, diversion, artificial recharge, or acquisition of ground water for beneficial use or for conducting pumping equipment or aquifer tests. "Well" does not include a naturally flowing spring or springs where the natural spring discharge is captured or concentrated by installation of a near-surface structure or device less than ten (10) feet in depth located at or within fifty (50) feet of the spring or springs' natural discharge point and the water is conveyed directly by gravity flow or into a separate sump or storage, where the owner obtains a water right for such structure or device as a spring. Low Risk Discharge Criteria This guidance is applicable to point source discharges that meet the following criteria:  Description of the Water Discharged. The discharge must consists of one or a combination of the following:  Normal HS Facility operation wastewater: Wastewater generated from operation of a HS Facility.  HS Facility draining wastewater: The division anticipates that HS Facility draining wastewater has similar characteristics to normal HS Facility operation wastewater. In this case, the discharge is generated by the partial or complete draining of a HS Facility that contains water from the continuous flow of natural hot springs source water.  Diverted source water. Wastewater generated by physically diverting (e.g., through a constructed water diversion or conveyance) natural hot springs source water around a Page 3 of 6 Dedicated to protecting and improving the health and environment of the people of Colorado HS Facility for either commingled or direct discharge to the receiving stream. Diverted source water cannot receive direct chemical addition.  Potable water fed pool/spa wastewater. Wastewater from pools/spas and other similar type facilities where the discharge meets the requirements of the Low Risk Discharge Guidance: Discharges from Pools, Fountains and Other Similar Type Facilities that are Fed Solely by Potable Water prior to commingling with one or more of the discharges listed above.  Source Water. The source waters for the discharges listed above in the “Description of the Water Discharged” section are natural hot springs or potable water.  No Filter Backwash to Surface Waters: The discharge of filter backwash water to surface water is not allowed under this guidance. Wastewater discharges associated with filter backwash may be land-applied in a manner that prevents runoff to surface water, sent to the sanitary sewer with permission of the local wastewater treatment facility, or otherwise collected and legally disposed of.  For Flow-through HS Facilities, No Direct Addition of Chemical Disinfectants: For flow- through hot springs facilities that cannot be contained prior to discharge to allow the dissipation of disinfection chemicals (including but not limited to chlorine, bromine, and algaecides), such chemicals may not be added to the source water or pool water. Note that the direct addition of chemical disinfectants is allowed where the pool water can be contained prior to discharge and the control measures provided below are implemented as applicable. Note also that the use of cleaning chemicals is allowed only where the water can be contained and control measures provided below are implemented as applicable.  Description of the Discharge: The discharge may be to surface water and/or to land. Discharges solely to ground water are not covered under this low risk discharge guidance if such discharge is to an impoundment subject to regulation under Section 9 of the Colorado Solid Waste regulations (6 CCR 1007-2) or is to an underground injection well subject to regulation by the EPA through underground injection control program. Requirements The following items must be followed by anyone discharging wastewater in accordance with this guidance:  During cleaning operations, the discharge of cleaning materials or chemicals is strictly prohibited, with the exception of residual chlorine and bromine that is below detection levels. Wastewater from cleaning operations must be contained as necessary to meet this requirement. Discharges associated with cleaning operations that cannot meet this requirement must be sent to the sanitary sewer, with permission of the local wastewater treatment facility, or otherwise collected and legally disposed of. Page 4 of 6 Dedicated to protecting and improving the health and environment of the people of Colorado  All discharges must comply with the lawful requirements of federal agencies, municipalities, counties, drainage districts, and other local agencies regarding any discharges to storm drain systems, conveyances, or other water courses under their jurisdiction. In addition, if the discharge is to a storm sewer, prior to discharge the owner/operator must notify the owner of the conveyance system of the date, approximate time, location, and duration of the discharge(s). The guidance included in this document in no way reduces the existing authority of the owner of a storm sewer, or other local agency, from prohibiting or placing additional conditions on the discharge.  The discharge shall not result in flooding of neighboring property, streets, gutters or storm sewers. The discharge must be diverted from building foundations or other areas that may be damaged from ground settling or swelling.  The discharge must be visibly clear and not contain floating or solid materials.  A visible sheen must not be evident in the discharge.  The discharge must not contain residual chlorine or bromine above detection levels. Implementation of Control Measures Control measures should be implemented as necessary to meet the conditions above, by anyone discharging swimming pool wastewater or other similar type water. The following control measures have been developed by the division to help ensure that the discharge will not negatively affect water quality.  Control Measures Associated with Chemical Disinfection: The direct addition of chemical disinfectants is allowed only where the pool water can be contained prior to discharge and the control measure provided below can be implemented as applicable:  Remove any solid chlorine or bromine tablets or pucks from the filtration system and disconnect automatic disinfecting devices well in advance of draining a pool, hot tub or other similar facility. Allow water to stand uncovered until no chlorine or bromine residual is detected, and any heated pool water cools to ambient temperatures.  Control Measures associated with Additional Facility-Operations  Standing water or accumulated rain and/or pool water from the previous season or other pool water with settled solids, should be pumped from the top so as not to disturb settled solids. Solids on the pool bottom should not be discharged. After the water has been pumped, solids should be cleaned out manually and disposed of properly. Page 5 of 6 Dedicated to protecting and improving the health and environment of the people of Colorado  A filter bag or similar filtration device should be used to remove suspended solids, hair or other debris. This device should be used and maintained in accordance with the manufacturers specifications.  An absorbent oil pad, boom or similar device should be used to eliminate any oil from the discharge water.  Control Measures associated with Cleaning Operations: Wastewater associated with cleaning operations, including facility water that comes into contact with residual chemicals from cleaning operations, must be contained prior to discharge and the control measures provided below should implemented as applicable:  Cleaning operations at HS Facilities may include, but are not limited to, acid cleaning, pressure washing, resurfacing, grouting, and painting. Cleaning operations have the potential to contribute residual chemicals to wastewater, including muriatic acid, chlorine, or particulate matter. Control measures must be implemented to prevent the discharge of chemicals, cleaning residuals, and/or cleaning materials in cleaning wastewaters. The use of cleaning chemicals is allowed only where the control measures provided below can be implemented as applicable: o Contain and allow cleaning wastewater to stand uncovered until no chlorine or bromine residual is detected prior to discharge. o Contain and prevent the discharge of wastewater with cleaning chemicals other than chlorine and bromine. o Use a filter bag or similar filtration device to remove suspended solids, hair or other debris. The discharge of cleaning wastewater must be visibly clear and not contain floating or solid materials. o Use an absorbent oil pad, boom or similar device to eliminate any oil from the discharge of cleaning wastewater. A visible sheen must not be evident in the discharge.  Additional Control Measures: The following control measures associated with daily operations should be implemented to meet the requirements above. It is highly recommended that the control measures be documented in a pollution control plan or incorporated in existing operational documents:  Pollutant control practices may include, but are not limited to, scheduling of activities, prohibitions of practices, maintenance procedures (such as use of filter bags, inlet protection, and/or wet vacuums to capture, collect and dispose of particulates), handling and disposal practices, and other management practices necessary to prevent the discharge of chemicals to the receiving stream. Page 6 of 6 Dedicated to protecting and improving the health and environment of the people of Colorado  All discharges and associated runoff should be routed to avoid causing erosion.  If the discharge is to a sanitary sewer, contact the local wastewater treatment facility or owner of the storm sewer prior to discharge. This must be done to ensure that the facility is able to accept the discharge. Not all facilities are able to accept such discharges. Note that additional restrictions or local guidelines may apply.  If the discharge is to a storm sewer, notify the owner of the conveyance system of the date, approximate time, location, and duration of the discharge(s) prior to discharge. This guidance in no way reduces the existing authority of the owner of a storm sewer, or other local agency, from prohibiting or placing additional conditions on the discharge.  All pool and related facility maintenance and cleaning chemicals should be stored in a secure area where spills are contained and cannot enter the drainage or the sanitary sewer system. Old cleaning, maintenance and treatment chemicals may require special disposal. Follow the manufacturer’s directions for disposal of these products. For further disposal information, contact the Colorado Department of Public Health and Environment’s Hazardous Materials and Waste Management Division at 303-692-3320. SECTION 1 1 Spill Response Spill Report forms can be found in this section. Environmental Spill Reporting 24—Hour Emergency and Incident Reporting Line Office of Emergency Preparedness & Response 1-877-518-5608 Updated: June, 2018 Environmental Spill Reporting 1 Reporting chemical spills and releases in Colorado General For all hazardous substance incidents, local emergency response agencies must be notified. Releases from fixed facilities The Superfund Amendments and Reauthorization Act (SARA) Title III, requires reporting releases from fixed facilities Refer to the SARA Title III List of Lists, available from the Environmental Protection Agency (EPA), for the reportable quantity. The party that owns the spilled material must immediately notify the following agencies or organizations:  National Response Center (NRC) 1-800-424-8802;  Colorado Emergency Planning Committee (CEPC), represented by the Colorado Department of Public Health and Environment (CDPHE) 1-877-518-5608; and  Local Emergency Planning Committee (LEPC) 1-720-852-6600. In addition to telephone notification, the responsible party must also send written notification describing the release and associated emergency response to both the CEPC (in this case, CDPHE) and the LEPC. Releases from RCRA facilities Emergency releases from facilities permitted under the Resource Conservation and Recovery Act (RCRA) are reportable according to the permit requirements. The permit often requires reporting to CDPHE, even if the amount of the release is less than a reportable quantity under SARA Title III (6 CCR 1007-3 Part 264). Permitted facilities and generators and transporters of hazardous waste are required to have and implement a contingency plan that describes the actions facility personnel must take in response to fires, explosions or any unplanned sudden or non-sudden release of hazardous waste or hazardous waste constituents to air, soil, surface or ground water at the facility (6 CCR 1007-3 Sections 261, 262, 263, 264 and 265). Whenever there is an imminent or actual emergency situation, appropriate state or local agencies, with designated response roles as described in the contingency plan, must be notified immediately. The National Response Center or government official designated as the regional on-scene coordinator must be notified immediately if it is determined that the facility has had a release, fire or explosion that could threaten human health or the environment outside the facility. CDPHE and local authorities must be notified when the facility is back in compliance and ready to resume operations. In addition, the facility must send a written report to CDPHE within 15 days of any incident that requires implementation of the contingency plan. The contingency plan should include current contact information for notification and submittal of written reports. Permitted facilities, generators and transporters that store hazardous waste must notify CDPHE within 24 hours of any release to the environment that is greater than one (1) pound and must submit a written report to CDPHE within 30 days of the release (6 CCR 1007-3). Environmental Spill Reporting 2 Transportation accidents Transportation accidents that require reporting:  Result in a spill or release of a hazardous substance in excess of the reportable quantity (40 CFR Part 302.6)  Cause injury or death or cause estimated property damage exceeding $50,000.  Cause an evacuation of the general public lasting one or more hours. Those that close or shut down one or more major transportation arteries or facilities or result in fire, breakage, spillage, or suspected contamination from radioactive or infectious substances must immediately be reported to the National Response Center. Refer to the EPA SARA Title III List of Lists for those substances that have reportable quantities. In addition to the NRC being notified, the local emergency number (9-1-1) must be called and CDPHE should be notified. Written notification of any transportation accident involving a release of hazardous materials must be provided to the U.S. Department of Transportation within 30 days (49 CFR Part 171.16) Since hazardous waste is a subset of hazardous materials, transporters who have discharged hazardous waste must notify the NRC and provide a written report to the US Department of Transportation as noted in the above reporting requirements. The transporter must give immediate notice to the nearest Colorado State Patrol office (8 CCR 1507-8 HMP 5) and the nearest law enforcement agency if the accident or spill involved a vehicle (42-20-113(3) CRS). Notification and a written report detailing the ultimate disposition of the discharge of hazardous waste must also be provided to CDPHE (6 CCR 1007-2 Section 263.30). This may be a duplicate copy of the US Department of Transportation report In the event of a spill or discharge of hazardous waste at a transfer facility, the transporter must notify CDPHE within 24 hours if the spill exceeds 55 gallons or if there is a fire or explosion. Within 15 days of a reportable incident, the transporter must submit a written report of the incident to CDPHE, including the final disposition of the material (6 CCR 1007-2 Section 263.40). Releases of hazardous waste at a transfer facility may also require notification to the National Response Center and a written report to the U.S. Department of Transportation. Releases to water A release of any chemical, oil, petroleum product, sewage, etc., which may enter waters of the State of Colorado (which include surface water, ground water and dry gullies or storm sewers leading to surface water) must be reported to CDPHE immediately (25-8-601 CRS). Written notification to CDPHE must follow within five (5) days (5 CCR 1002-61, Section 61.8(5)(d)). Any accidental discharge to the sanitary sewer system must be reported immediately to the local sewer authority and the affected wastewater treatment plant. Releases of petroleum products and certain hazardous substances listed under the Federal Clean Water Act (40 CFR Part 116) must be reported to the National Response Center as well as to CDPHE (1-877-518-5608) as required under the Clean Water Act and the Oil Pollution Act. Releases to air Any unpredictable failure of air pollution control or process equipment that results in the violation of emission Environmental Spill Reporting 3 control regulations should be reported CDPHE by 10 a.m. of the following working day, followed by a written notice explaining the cause of the occurrence and describing action that has been or is being taken to correct the condition causing the violation and to prevent such excess emissions in the future (5 CCR 1001-2 Common Provisions Regulations Section II.E). If emergency conditions cause excess emissions at a permitted facility, the owner/operator must provide notice to CDPHE no later than noon of the next working day following the emergency, and follow by written notice within one month of the time when emission limitations were exceeded due to the emergency (5 CCR 1001-5, Regulation 3 Part C, Section VII.C.4). Releases from oil and gas wells All spills or releases of exploration and production wastes or produced fluids which meet the reporting thresholds of the Colorado Oil and Gas Conservation Commission (COGCC) Rule 906 shall be reported verbally to the COGCC within 24 hours of discovery and on the COGCC Spill/Release Report Form 19 within 72 hours of discovery. Spills or releases are reportable to the COGCC in the following circumstances: 1) the spill or release impacts or threatens to impact any waters of the state, (which include surface water, ground water and dry gullies or storm sewers leading to surface water), a residence or occupied structure, livestock or a public byway; 2) a spill or release in which 1 barrel or more is released outside of berms or other secondary containment; or 3) any spill or release of 5 barrels or more. COGCC also requires reportable spills or releases be reported to the surface owner and local government. Whether or not they are reportable, spills or releases of any size must be stopped, cleaned up, and investigated as soon as practicable. If the spill or release impacts or threatens to impact waters of the state, it must also be reported immediately to CDPHE (25-8-601 CRS). Releases from storage tanks Petroleum releases of 25 gallons or more (or any size that causes a sheen on nearby surface waters) from regulated aboveground and underground fuel storage tanks must be reported to the Division of Oil and Public Safety (303-318-8547) within 24 hours. If the report is made after business hours, please leave a message on the technical assistance line for the Division of Oil and Public Safety, and contact the 24 hour CDPHE Emergency and Incident Reporting Line. This includes spills from fuel dispensers. Spills or releases of hazardous substances from regulated storage tanks in excess of the reportable quantity (40 CFR Part 302.6) must be reported to the National Response Center and the local fire authority immediately, and to the Division of Oil and Public Safety within 24 hours. (8-20.5-208 CRS and 7 CCR 1101-14 Article 4). Owners/operators of regulated storage tanks must contain and immediately clean up a spill or overfill of less than 25 gallons of petroleum and a spill or overfill of a hazardous substance that is less than the reportable quantity. If cleanup cannot be accomplished within 24 hours, the Division of Oil and Public Safety must be notified immediately (7 CCR 1101-14 Article 4-4). CDPHE should also be notified in the case of hazardous substance releases as cleanup activities may be covered by state solid or hazardous waste requirements (6 CCR 1007-2, 6 CCR 1007-3). Any release that has or may impact waters of the state (which include surface water, ground water and dry Environmental Spill Reporting 4 gullies or storm sewers leading to surface water), no matter how small, must be reported immediately to CDPHE (25-8-601 CRS). Releases from pipelines Releases of five or more gallons of hazardous liquids or carbon dioxide from a pipeline that result in explosion or fire, cause injury or death or cause estimated property damage (including cost of clean-up and recovery, value of lost product and property damage) exceeding $50,000 must be reported immediately to the US Department of Transportation Office of Pipeline Safety (49 CFR Part 195 Subpart B) and the National Response Center. Releases of five or more gallons of hazardous liquids or carbon dioxide from interstate pipelines that do not involve explosion or fire, injury or death or property damage exceeding $50,000 should be reported to the US Department of Transportation Office of Pipeline Safety within 30 days after the incident. Releases of natural gas from intrastate pipelines that cause injury or death, property damage in excess of $50,000 (including the cost of lost product), closure of a public road, or evacuation of 50 or more people must be reported immediately to the Colorado Public Utilities Commission, Pipeline Safety Group (4 CCR 723-11-2). Releases of natural gas or liquefied natural gas (LNG) from interstate pipelines that cause injury or death, property damage in excess of $50,000 (including the cost of lost product), or results in an emergency shutdown of the facility must be reported immediately to the National Response Center and the US Dept of Transportation Office of Pipeline Safety. Releases of oil, petroleum products or other hazardous liquids from interstate and intrastate pipelines that have or may enter waters of the State of Colorado (which include surface water, ground water and dry gullies or storm sewers leading to surface water) must be reported to CDPHE immediately (25-8-601 CRS). CDPHE should also be notified of releases to soil, as cleanup activities may be covered by state solid or hazardous waste requirements (6 CCR 1007-2, 6 CCR 1007-3). Radiological accidents, incidents, and events CDPHE must be notified of any condition that has caused or threatens to cause an event, which meets or exceeds the criteria specified in (6 CCR 1007-1) RH 4.51 and RH 4.52 of the State of Colorado Rules and Regulations Pertaining to Radiation Control. Reportable events include lost radioactive materials, lost radiation producing machines, over-exposures to persons, contamination events and fires or explosions involving radioactive materials. Depending upon the severity of the event, notification may be required immediately, within 24 hours, or within 30 days. In most cases, a written follow-up report is also required. If you are unsure of the proper notification requirement, please contact CDPHE immediately. Telephone event notifications can be made to the CDPHE Radiation Program at any time by calling 1-303-877-9757. Notification Numbers Colorado Department of Public Health and Environment toll-free 24-hour environmental emergency and incident reporting line: (877) 518-5608 (24-hour) National Response Center (800) 424-8802 (24-hour) State Oil Inspector (Colorado Division of Oil & Public Safety-Above & Underground Storage Tank Regulators) (303) 318-8547 Five day reporting form Incident / spill / sanitary sewer overflow release Use this form to report incidents impacting waters of the state The Water Quality Control Division distinguishes between reporting requirements for incidents that occur at entities operating under a Colorado Discharge Permit System (CDPS) permit and those resulting from non-permitted activities. Permitted activities - Reporting and management of non-compliance incidents and spills that occur as a result of permitted activities should be performed in accordance with the specific requirements in the notifications section of your permit. You may use this form to submit the information requested in the permit. Non-permitted activities - In the case of an activity where a permit does not address reporting of, or response to, a given spill please submit a written summary of the event, your response, and clean up efforts to the division within five working days of the date of the event. This form is provided for your convenience. If you have any questions please contact the division’s field services staff person assigned to your spill case. Prior to the five working day deadline you may request an extension to submit the report if needed for sampling analysis or other reasons. To request an extension please send an email to the division’s field services staff person assigned to your spill case or to the spill administrator. The field services contact list is available at: www.colorado.gov/cdphe/wq-inspection-services-contact-us. Please send the completed form or report with signature to the division’s field services spill administrator: Michelle Thiebaud 222 S. Sixth Street, 232 Grand Junction, CO 81501 Telephone: 970-248-7150 Fax: 970-248-7198 Email: michelle.thiebaud@state.co.us 1. Incident background information Incident/spill number (division provided) Date of event County Type of incident / spill / SSO (check one) ☐ Sanitary sewer overflow ☐ Potable water/reuse water/ reclaimed water ☐ Biosolids ☐ Wastewater treatment plant bypass or upset (authorized outfall point) ☐ Petroleum product ☐ Oil or gas field production spill ☐ Wastewater treatment plant spill or overflow (other than outfall) ☐ Chemical ☐ Other Estimated volume released Size and depth of area affected Contact information Potentially responsible party contact name Potentially responsible party company/agency name CDPHE Permit number and facility name (if applicable) Email address Phone 2. Incident information: Please provide the following information. A. Describe incident including source, cause, and location (e.g. address, latitude/longitude). B. Material released, e.g. untreated wastewater, specific chemical or product, biosolids. Please attach the OSHA Material Safety Data Sheets for any and all chemicals or products in spill or release. Revised November 2017 C. Actual or estimated duration of the event and time spill was fully controlled/stopped. If release is still occurring, the date and time the release is expected to be stopped. D. Describe measures taken or planned to contain, reduce, and clean up spill or release. E. Describe steps taken or planned to prevent reoccurrence. 3. Incident impact to state waters (As defined in § 25-8-103(19), C.R.S.). Examples of state waters include: stormwater conveyances (when they discharge to surface water), perennial streams, intermittent or ephemeral gulches, ditches, ponds, lakes, reservoirs, irrigation canals, wetlands and groundwater. A. Did flow or materials reach surface water of the state? If so, identify the water body or bodies and describe the path of flow. What quantity of material reached the surface waters and what was the resulting impact? B. Did flow or materials reach groundwater of the state? If so, identify the water body or bodies and describe the path of flow. If yes, what quantity of material reached the ground or groundwater and what was the resulting impact? C. Did the incident include any of the following? If so, please include additional details below. ☐ Chemical release ☐ Fish kill ☐ Sheen on water D. Were any water quality samples or other samples taken? If so, please describe sampling process, sampling location(s) in relationship to the incident, i.e. up/down stream and attach results. 4. Incident impact to areas or water users A. Describe the potential impact of the incident/spill/SSO to public use areas or downstream water users. This includes parks and swim beaches or public water system sources and irrigation diversions. B. Were the impacted area users and downstream water users notified and describe the method of notification, e.g. signs posted, via phone. C. List any downstream users who were notified. I hereby certify that the information presented above is accurate and complete. Signature Name and title Company, organization Date SECTION 1 2 Endangered Species Documentation SECTION 1 3 Historic Preservation Documentation Section 106 of the 1966 National Historic Preservation Act (as amended) aims to protect historic and cultural properties from unintentional federal action. A federal action can be through a permit, license or funding. If the preceding situations do not app ly to this project a Section 106 review is not required. The permittee must still comply with relevant state and local regulations. SECTION 1 4 Inspection Reports -Inspection Reports CONSTRUCTION STORMWATER SITE INSPECTION REPORT Facility Name Permittee Date of Inspection Weather Conditions Permit Certification # Disturbed Acreage Phase of Construction Inspector Title Inspector Name Is the above inspector a qualified stormwater manager? (permittee is responsible for ensuring that the inspector is a qualified stormwater manager) YES NO INSPECTION FREQUENCY Check the box that describes the minimum inspection frequency utilized when conducting each inspection At least one inspection every 7 calendar days At least one inspection every 14 calendar days, with post-storm event inspections conducted within 24 hours after the end of any precipitation or snowmelt event that causes surface erosions • This is this a post-storm event inspection. Event Date: _____________________ Reduced inspection frequency - Include site conditions that warrant reduced inspection frequency • Post-storm inspections at temporarily idle sites • Inspections at completed sites/area • Winter conditions exclusion Have there been any deviations from the minimum inspection schedule? If yes, describe below. YES NO INSPECTION REQUIREMENTS* i. Visually verify all implemented control measures are in effective operational condition and are working as designed in the specifications ii. Determine if there are new potential sources of pollutants iii. Assess the adequacy of control measures at the site to identify areas requiring new or modified control measures to minimize pollutant discharges iv. Identify all areas of non-compliance with the permit requirements, and if necessary, implement corrective action *Use the attached Control Measures Requiring Routine Maintenance and Inadequate Control Measures Requiring Corrective Action forms to document results of this assessment that trigger either maintenance or corrective actions AREAS TO BE INSPECTED Is there evidence of, or the potential for, pollutants leaving the construction site boundaries, entering the stormwater drainage system or discharging to state waters at the following locations? NO YES If "YES” describe discharge or potential for discharge below. Document related maintenance, inadequate control measures and corrective actions Inadequate Control Measures Requiring Corrective Action form Construction site perimeter All disturbed areas Designated haul routes Material and waste storage areas exposed to precipitation Locations where stormwater has the potential to discharge offsite Locations where vehicles exit the site Other: ____________________ CONTROL MEASURES REQUIRING ROUTINE MAINTENANCE Definition: Any control measure that is still operating in accordance with its design and the requirements of the permit, but requires maintenance to prevent a breach of the control measure. These items are not subject to the corrective action requirements as specified in Part I.B.1.c of the permit. Are there control measures requiring maintenance? NO YES If “YES” document below Date Observed Location Control Measure Maintenance Required Date Completed INADEQUATE CONTROL MEASURES REQUIRING CORRECTIVE ACTION Definition: Any control measure that is not designed or implemented in accordance with the requirements of the permit and/or any control measure that is not implemented to operate in accordance with its design. This includes control measures that have not been implemented for pollutant sources. If it is infeasible to install or repair the control measure immediately after discovering the deficiency the reason must be documented and a schedule included to return the control measure to effective operating condition as possible. Are there inadequate control measures requiring corrective action? NO YES If “YES” document below Are there additional control measures needed that were not in place at the time of inspection? NO YES If “YES” document below Date Discovered Location Description of Inadequate Control Measure Description of Corrective Action Was deficiency corrected when discovered? YES/NO if “NO” provide reason and schedule to correct Date Corrected REPORTING REQUIREMENTS The permittee shall report the following circumstances orally within twenty-four (24) hours from the time the permittee becomes aware of the circumstances, and shall mail to the division a written report containing the information requested within five (5) working days after becoming aware of the following circumstances. The division may waive the written report required if the oral report has been received within 24 hours. All Noncompliance Requiring 24-Hour Notification per Part II.L.6 of the Permit a. Endangerment to Health or the Environment Circumstances leading to any noncompliance which may endanger health or the environment regardless of the cause of the incident (See Part II.L.6.a of the Permit) This category would primarily result from the discharge of pollutants in violation of the permit b. Numeric Effluent Limit Violations o Circumstances leading to any unanticipated bypass which exceeds any effluent limitations (See Part II.L.6.b of the Permit) o Circumstances leading to any upset which causes an exceedance of any effluent limitation (See Part II.L.6.c of the Permit) o Daily maximum violations (See Part II.L.6.d of the Permit) Numeric effluent limits are very uncommon in certifications under the COR400000 general permit. This category of noncompliance only applies if numeric effluent limits are included in a permit certification. Has there been an incident of noncompliance requiring 24-hour notification? NO YES If “YES” document below Date and Time of Incident Location Description of Noncompliance Description of Corrective Action Date and Time of 24 Hour Oral Notification Date of 5 Day Written Notification * *Attach copy of 5 day written notification to report. Indicate if written notification was waived, including the name of the division personnel who granted waiver. After adequate corrective action(s) and maintenance have been taken, or where a report does not identify any incidents requiring corrective action or maintenance, the individual(s) designated as the Qualified Stormwater Manager, shall sign and certify the below statement: “I verify that, to the best of my knowledge and belief, all corrective action and maintenance items identified during the inspection are complete, and the site is currently in compliance with the permit.” ______________________________________ _______________________________________ Name of Qualified Stormwater Manager Title of Qualified Stormwater Manager ______________________________________ _______________________________________ Signature of Qualified Stormwater Manager Date Notes/Comments SECTION 1 5 Regulatory Correspondence Pertinent correspondence from regulatory agencies relating to this project can be located here. SECTION 1 6 Notice of Termination Authorization for termination of the permit received from the CDPHE should be stored here once received.