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Home My WebLink AboutSIT AND STAY DOG BAR - FDP230005 - SUBMITTAL DOCUMENTS - ROUND 1 - 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 February 2023 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 ............................................................................................................. Spill Response Section 11 ........................................................................... Endangered Species Documentation Section 12 ........................................................................... Historic Preservation Documentation Section 13 ....................................................................................................... Inspection Reports Section 14 ........................................................................................ Regulatory Correspondence Section 15 ................................................................................................... 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 February 2023 1 Notice of Intent 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 Stormwater Discharges Associated with Construction Activity will be kept in this section. COLORADO DEPARTMENT OF PUBLIC HEAL TH AND ENVIRONMENT Water Quality Control Division CONSTRUCTION ACTIVITY Permit History Originally signed and issued October 31, 2018; effective April 1, 2019. Table of Contents Part I ........................................................................................................................... 1 A.COVERAGE UNDER THIS PERMIT ...................................................................................... 1 1.Authorized Discharges ............................................................................................ 1 2.Limitations on Coverage .....••.......••.......••..........•.......••.......••.......••..•.......••.......••...... 1 3.Permit Certification and Submittal Procedures ............................................................... 2 6.EFFLUENT LIMITATIONS ..........•........•.........•.......•..........•.........•........•..........•.........•...... 6 1.Requirements for Control Measures Used to Meet Effluent Limitations ..........••.......••.......••..... 6 2.Discharges to an Impaired Waterbody .......................................................................... 9 3.General Requirements .......••.......••.......••..........••.......••.......••..........••.......••.......••.... 10 C.STORMWATER MANAGEMENT PLAN (SWMP) REQUIREMENTS .................................................... 11 1.SWMP General Requirements ................................................................................... 11 2.SWMP Content .................................................................................................... 11 3.SWMP Review and Revisions .................................................................................... 13 4. SWMP Availability ................................................................................................. 14 ID. SITE INSPECTIONS ..................................................................................................... 14 1. Person Responsible for Conducting Inspections .............................................................. 14 2.Inspection Frequency ........••.......••.......••..........••.......••.......••.......•..•.......••.......••..... 14 3.Inspection Frequency for Discharges to Outstanding Waters ............................................... 15 4.Reduced Inspection Frequency ......••.......••.......•..•.......••.......••........•..•.......••.......••..... 15 5.Inspection Scope .................................................................................................. 16 E.DEFINITIONS ........................................................................................................... 17 F.MONITORING ..••.......••..........••.......••.......••......••..•.......•••......••.......••..•.......••.......••..... 20 G.Oil and Gas Construction ............................................................................................ 21 Part II: Standard Permit Conditions ...................................................................................... 22 A.DUTY TO COMPLY ..................................................................................................... 22 B.DUTY TO REAPPLY .................................................................................................... 22 (. NEED TO HALT OR REDUCE ACTIVITY NOT A DEFENSE ........................................................... 22 0.DUTY TO MITIGATE ................................................................................................... 22 E.PROPER OPERATION AND MAINTENANCE .......................................................................... 22 F.PERMIT ACTIONS ...................................................................................................... 22 G.PROPERTY RIGHTS .................................................................................................... 22 H.DUTY TO PROVIDE INFORMATION ................................................................................... 23 I.INSPECTION AND ENTRY ............................................................................................. 23 J.MONITORING AND RECORDS ......................................................................................... 23 K.SIGNATORY REQUIREMENTS ......................................................................................... 24 PART I Permit No.: COR400000 1.Authorization to Sign: ............................................................................................ 24 2.Electronic Signatures ............................................................................................ 25 3.Change in Authorization to Sign ................................................................................ 25 L.REPORTING REQUIREMENTS ......................................................................................... 25 1 • Planned Changes .................................................................................................. 25 2.Anticipated Non•Compliance ................................................................................... 25 3.Transfer of Ownership or Control .............................................................................. 25 4.Monitoring reports ................................................................................................ 26 5.Compliance Schedules ........................................................................................... 26 6.Twenty-four hour reporting ..................................................................................... 26 7.Other non·compliance ........................................................................................... 27 8.Other information ••..........••.......••.......••...........••.......••.......••.........••.......••.......••.... 27 M.BYPASS ................................................................................................................. 27 1.Bypass not exceeding limitations .............................................................................. 27 2.Notice of bypass ..••..........••.......••.......••.......•..•.......••.......•••.......•..•.......••.......••..... 27 3.Prohibition of Bypass ............................................................................................. 27 N.UPSET ................................................................................................................... 28 1.Ef feet of an upset ................................................................................................ 28 2.Conditions necessary for demonstration of an Upset ....................................................... 28 3.Burden of Proof ................................................................................................... 28 0.RETENTION OF RECORDS ............................................................................................. 28 1.Post-Expiration or Termination Retention .................................................................... 28 2.On-site Retention ................................................................................................. 29 P.REOPEN ER CLAUSE .................................................................................................... 29 1.Procedures for modification or revocation ................................................................... 29 2.Water quality protection ........................................................................................ 29 Q.SEVERABILITY .•.........•..........•..................•.......•..........••........•........•..........•.........•..... 29 R.NOTIFICATION REQUIREMENTS ..••.......••.......••.......•..•.......••.......••........•..•.......••.......••..... 29 1.Notification to Parties ........................................................................................... 29 S.RESPONSIBILITIES ..................................................................................................... 30 1.Reduction, Loss, or Failure of Treatment Facility ........................................................... 30 T.Oil and Hazardous Substance Liability ............................................................................. 30 U.Emergency Powers .................................................................................................... 30 V.Confidentiality ........................................................................................................ 30 W. Fees ..................................................................................................................... 30 PART I Permit No.: COR400000 X.Duration of Permit .................................................................................................... 30 Y.Section 307 Toxics ....••..........••.......••.......••.......•..•.......••.......••........•..•.......••.......••..... 30 Part I PART I Permit No.: COR400000 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. A.COVERAGE UNDER THIS PERMIT 1 • Authorized Discharges 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: a.Allowable Stormwater Discharges i.Stormwater discharges associated with construction activity. ii.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 a construction site (i.e. borrow or fill areas) iii.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.) b.Allowable 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 1.8.1. i.Discharges from uncontaminated springs that do not originate from an area of land disturbance. ii.Discharges to the ground of concrete washout water associated with the washing of concrete tools and concrete mixer chutes. Discharges of concrete washout water must not leave the site as surface runoff or reach receiving waters as defined by this permit. iii.Discharges of landscape irrigation return flow. c.Emergency Fire Fighting Discharges resulting from emergency firefighting activities are authorized by this permit. 2.Limitations on Coverage 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, as appropriate and available. a.Discharges of Non-Stormwater Page 1 of 33 PART I Permit No.: COR400000 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. b.Discharges Currently Covered by another Individual or General Permit c.Discharges Currently Covered by a Water Quality Control Division (division) Low Risk Guidance Document 3.Permit Certification and Submittal Procedures a.Duty to apply The following activities shall apply for coverage under this permit: i.Construction sites that will disturb one acre or more; or ii.Construction sites that are part of a common plan of development or sale; or iii.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. b.Application Requirements To obtain authorization to discharge under this permit, applicants applying for coverage following the effective date of the renewal permit shall meet the following requirements: i.Owners and operators submitting an application for permit coverage will be co permittees subject to the same benefits, duties, and obligations under this permit. ii.Signature requirements: Both the owner and operator (permittee) 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. iii.Applicants must use the paper form provided by the division or the electronic form provided on the division's web-based application platform when applying for coverage under this permit. iv.The applicant(s) must develop a stormwater management plan (SWMP) in accordance with the requirements of Part I.C. The applicant(s) must also certify that the SWMP is complete, or will be complete, prior to commencement of any construction activity. Page 2 of 33 PART I Permit No.: COR400000 v.The applicant(s) must submit a complete, accurate, and signed permit application electronically, by mail or hand delivery to the division at least 10 days prior to the commencement of construction activity except that construction activities that are in response to a public emergency related site shall 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. vi.The application must be signed in accordance with the requirements of Part IA. Applications submitted by mail or hand delivered should be directed 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 vii.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 c.Division Review of Permit Application Within 10 days of receipt of the application, and following review of the application, the division may: i.Issue a certification of coverage; ii.request additional information necessary to evaluate the discharge; iii.delay the authorization to discharge pending further review; iv.notify the applicant that additional terms and conditions are necessary; or v.deny the authorization to discharge under this general permit. d.Alternative Permit Coverage i.Division Required Alternate 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. In this case, the Division will notify the applicant or permittee that an individual permit application is required. ii.Permittee Request for alternate permit coverage: A permittee authorized to discharge stormwater under this permit may request to be excluded fr om 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. e.Submittal Signature Requirements Page 3 of 33 PARTI Permit No.: COR400000 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 11.K. of this permit in accordance with 40 C.F.R. 122.41 (k). i.Signature Certification 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." f.Compliance Document Signature Requirements Documents which are required for compliance with the permit, but for which submittal to the division is not required unless specifically requested by the division, must be signed by the individual(s) designated as the Qualified Stormwater Manager, as defined in Part I.E. i.Any person(s) signing inspection documents required for compliance with the permit must make the following 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." g.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. h.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: Page 4 of 33 PARTI Permit No.: COR400000 Part I.A.3.a.; Part I.A.3.b.; Part I.A.3.c.; Part I.A.3.d.; Part I.A.3.g.; Part I.A.3.i.; Part I.A.3.j.; Part I.A.3.k. Sites covered by a qualifying local program are subject to the following requirements: i.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. ii.Permit Coverage Termination: When a site under a Qualifying Local Program is finally stabilized, coverage under this permit is automatically terminated. iii.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. iv.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. v.Written Authorization of Coverage: The division or local municipality may require any permittee 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. i, Permittee Initiated Permit Actions Permittee initiated permit actions, including but not limited to modifications, contact changes, transfers, reassignments, and terminations, shall be conducted following division guidance and using appropriate division-provided forms. j.Sale of Residence to Homeowner Residential construction sites only: The permittee may remove residential lots from permit coverage once the lot meets the following criteria: i.the residential lot has been sold to the homeowner(s) for private residential use; ii.a certificate of occupancy, or equivalent, is maintained on-site and is available during division inspections; iii.the lot is less than one acre of disturbance; iv.all construction activity conducted on the lot by the permittee is complete; v.the permittee is not responsible for final stabilization of the lot; and vi. the SWMP was modified to indicate the lot is no longer part of the construction activity. If the residential lot meets the criteria listed above then activities occurring on the lot 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. Page 5 of 33 k.Permit Expiration and Continuation of Permit Coverage PART I Permit No.: COR400000 Authorization to discharge under this general permit shall expire at midnight on March 31, 2024. While Regulation 61.4 requires a permittee to submit an application for continuing permit coverage 180 days before the permit expires, the division is requiring that 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 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: i.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; or ii. The issuance and effect of a termination issued by the Division; or iii. The issuance or denial of an individual permit for the facility's discharges; or iv.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 v.The Division has informed the permittee that discharges previously authorized under this permit are no longer covered under this permit. 6.EFFLUENT LIMITATIONS 1.Requirements for Control Measures Used to Meet Effluent Limitations The permittee must implement control measures to minimize the discharge of pollutants from all potential pollutant sources at the site. Control measures must be installed prior to commencement of activities that may contribute pollutants to stormwater discharges. 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. a.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. i.Control Measures for Erosion and Sediment Control Page 6 of 33 PART I Permit No.: COR400000 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, subsurface drains, pipe slope drains, inlet protection, outlet protection, gabions, sediment basins, temporary vegetation, permanent vegetation, mulching, geotextiles, sod stabilization, slope roughening, maintaining existing vegetation, protection of trees, and preservation of mature vegetation. Specific non-structural control measures must meet the requirements listed below. Specific control measures must meet the requirements listed below. (a)Vehicle tracking controls shall either be implemented to minimize vehicle tracking of sediment from disturbed areas, or the areas where vehicle tracking occurs shall meet subsection Part I.B.1.a.i(b); (b)Stormwater runoff from all disturbed areas and soil storage areas for which permanent or temporary stabilization is not implemented, must flow to at least one control measure to minimize sediment in the discharge. This may be accomplished through filtering, settling, or straining. The control measure must be selected, designed, installed and adequately sized in accordance with good engineering, hydrologic and pollution control practices. 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 (i.e., sheet or concentrated flow); (c)Outlets that withdraw water from or near the surface shall be installed when discharging from basins and impoundments, unless infeasible. (d)Maintain pre-existing vegetation or equivalent control measures for areas within 50 horizontal feet of receiving waters as defined by this permit, unless infeasible. (e)Soil compaction must be minimized for areas where infiltration control measures will occur or where final stabilization will be achieved through vegetative cover. (f)Unless infeasible, topsoil shall be preserved for those areas of a site that will utilize vegetative final stabilization. (g)Minimize the amount of soil exposed during construction activity, including the disturbance of steep slopes. ii.Practices for Other Common Pollutants (a)Bulk storage, 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)Control measures designed for concrete washout waste 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 the 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 Page 7 of 33 PART I Permit No.: COR400000 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 washout location shall be 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 concrete washout waste. iii.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 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. (b)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. (c)Final stabilization must be designed and installed as a permanent feature. 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 (e.g., crimped straw, hydro mulch or rolled erosion control products); (4)Appropriate sediment control measures as needed until final stabilization is achieved; (5)Permanent pavement, hardscape, xeriscape, stabilized driving surfaces; (6)Other alternative stabilization practices as applicable; Page 8 of 33 PART I Permit No.: COR400000 (d)The permittee(s) must ensure all temporary control measures are removed from the construction site once final stabilization is achieved, except when the control measure specifications allow the control measure to be left in place (i.e., bio-degradable control measures). b.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 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. This section is not subject to the requirements in Part I.B.1.c. below. c.Corrective Actions 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. i.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. (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. ii.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. 2.Discharges to an Impaired Waterbody a.Total Maximum Daily Load (TMDL) If the permittee's discharge flows to or could reasonably be expected to flow to any water body for which a TMDL has been approved, and stormwater discharges Page 9 of 33 PART I Permit No.: COR400000 associated with construction activity were assigned a pollutant-specific Wasteload Allocation (WLA) under the TMDL, the division may: i.ensure the WLA is implemented properly through alternative local requirements, such as by a municipal stormwater permit; or ii.notify the permittee of the WLA and amend the permittee's certification to add specific effluent limits and other requirements, as appropriate. The permittee may be required to do the following: (a)under the permittee's SWMP, 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. iii.Discharge monitoring may also be required. The permittee may maintain coverage under the general permit provided they comply with the applicable requirements outlined above. The division reserves the right to require individual or alternate general permit coverage. 3.General Requirements a.Discharges authorized by this permit shall 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. b.The division may require sampling and testing, on a case-by-case basis, in the event that there is reason to suspect that the SWMP 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. c.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. d.All construction site wastes must be properly managed to prevent potential pollution of state waters. This permit does not authorize on-site waste disposal. e.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 11.L. of the permit). Page 10 of 33 C.STORMWATER MANAGEMENT PLAN (SWMP) REQUIREMENTS 1.SWMP General Requirements PARTI Permit No.: COR400000 a.A SWMP shall be developed for each construction site covered by this permit. The SWMP must be prepared in accordance with good engineering, hydrologic and pollution control practices. i.For public emergency related sites a SWMP shall be created no later than 14 days after the commencement of construction activities. b.The permittee must implement the provisions of the SWMP as written and updated, from commencement of construction activity until final stabilization is complete. The division may review the SWMP. c.A copy of the SWMP must be retained onsite or be onsite when construction activities are occurring at the site unless the permittee specifies another location and obtains approval from the division. 2.SWMP Content a.The SWMP, at a minimum, must include the following elements. i.Qualified Stormwater Manager. The SWMP must list individual(s) by title and name who are designated as the site's qualified stormwater manager(s) responsible for implementing the SWMP in its entirety. This role may be filled by more than one individual. ii.Spill Prevention and Response Plan. The SWMP 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 COPS permit. The relevant sections of any referenced plans must be available as part of the SWMP consistent with Part I.C.4. iii.Materials Handling. The SWMP must describe and locate 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. iv.Potential Sources of Pollution. The SWMP 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. This shall include, but is not limited to, the following pollutant sources: (a)disturbed and stored soils; (b)vehicle tracking of sediments; (c)management of contaminated soils; (d)loading and unloading operations; Page 11 of 33 PARTI Permit No.: COR400000 (e) outdoor storage activities (erodible building materials, fertilizers, chemicals, etc.); (f)vehicle and equipment maintenance and fueling; (g) significant dust or particulate generating processes (e.g., saw cutting material, including dust); (h)routine maintenance activities involving fertilizers, pesticides, herbicides, detergents, fuels, solvents, oils, etc.; (i)on-site waste management practices (waste piles, liquid wastes, dumpsters); (j)concrete truck/ equipment washing, including washing of the concrete truck chute and associated fixtures and equipment; (k)dedicated asphalt, concrete batch plants and masonry mixing stations; (l)non-industrial waste sources such as worker trash and portable toilets. v.Implementation of Control Measures. The SWMP must include design specifications that contain information on the implementation of the control measure 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 SWMP 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 SWMP 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. vi. Site Description. The SWMP must include a site description which includes, at a minimum, the following: (a)the nature of the construction activity at the site; (b)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.); (c)estimates of the total acreage of the site, and the acreage expected to be disturbed by clearing, excavation, grading, or any other construction activities; (d) a summary of any existing data used in the development of the construction site plans or SWMP that describe the soil or existing potential for soil erosion; Page 12 of 33 PARTI Permit No.: COR400000 (e)a description of the percent of existing vegetative ground cover relative to the entire site and the method for determining the percentage; (f)a description of any allowable non-stormwater discharges at the site, including those being discharged under a division low risk discharge guidance policy; (g)a description of areas receiving discharge from the site. Including a description of the immediate source receiving the discharge. If the stormwater discharge is to a municipal separate storm sewer system, the name of the entity owning that system, the location of the storm sewer discharge, and the ultimate receiving water(s); and (h)a description of all stream crossings located within the construction site boundary. vii.Site Map. The SWMP must include a site map which includes, at a minimum, the following: (a)construction site boundaries; (b)flow arrows that depict stormwater flow directions on-site and runoff direction; (c)all areas of ground disturbance including areas of borrow and fill; (d)areas used for storage of soil; (e)locations of all waste accumulation areas, including areas for liquid, concrete, masonry, and asphalt; (f)locations of dedicated asphalt, concrete batch plants and masonry mixing stations; (g)locations of all structural control measures; (h)locations of all non-structural control measures; (i)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 (j)locations of all stream crossings located within the construction site boundary. vm. Final Stabilization and Long Term Stormwater Management. The SWMP must describe the practices used to achieve final stabilization of all disturbed areas at the site and any planned practices 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. ix.Inspection Reports. The SWMP must include documented inspection reports in accordance with Part ID. 3.SWMP Review and Revisions Page 13 of 33 PART I Permit No.: COR400000 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.a change in design, construction, operation, or maintenance of the site requiring implementation of new or revised control measures; b.the SWMP proves ineffective in controlling pollutants in stormwater runoff in compliance with the permit conditions; c.control measures identified in the SWMP are no longer necessary and are removed; and d.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. 4.SWMP Availability A copy of the SWMP 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 SWMP is required to be submitted to any of these entities, the submission must include a signed certification in accordance with Part 1.A.3.e., certifying that the SWMP is complete and compliant with all terms and conditions of the permit. All SWMPs 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 SWMP as confidential in accordance with 40 CFR Part 2. D.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 SWMP. Proper maintenance of control measures may require more frequent inspections. Site inspections shall start within 7 calendar days of the commencement of construction activities on site. 1.Person Responsible for Conducting Inspections 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 is a qualified stormwater manager. 2.Inspection Frequency Page 14 of 33 PART I Permit No.: COR400000 Permittees must conduct site inspections in accordance with one of the following minimum frequencies, unless the site meets the requirements of Part ID.3 a.At least one inspection every 7 calendar days. Or b.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. c.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 may not be implemented prior to written approval by the division and incorporation into the SWMP. 3.Inspection Frequency for Discharges to Outstanding Waters 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. 4.Reduced Inspection Frequency The permittee may perform site inspections at the following reduced frequencies when one of the following conditions exists: a.Post-Storm Inspections at Temporarily Idle Sites For permittees choosing to combine 14-day inspections and post-storm-event· inspections, if no construction activities will occur following a storm event, post-storm event inspections must be conducted prior to re-commencing construction activities, but no later than 72 hours following the storm event. The delay of any post-storm event inspection must be documented in the inspection record. Routine inspections must still be conducted at least every 14 calendar days. b.Inspections at Completed Sites/ Areas 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. c.Winter Conditions Inspections Exclusion Page 15 of 33 PARTI Permit No.: COR400000 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; ii.date when construction activities ceased; and iii. date melting conditions began. 5. Inspection Scope a.Areas to be Inspected When conducting a site inspection the following areas, if applicable, must be inspected for evidence of, or the potential for, pollutants leaving the construction site boundaries, entering the stormwater drainage system, or discharging to state waters: i. construction site perimeter; ii.all disturbed areas; iii. designated haul routes; iv.material and waste storage areas exposed to precipitation; v.locations where stormwater has the potential to discharge off site; and vi.locations where vehicles exit the site. b.Inspection Requirements i.Visually verify whether all implemented control measures are in effective operational condition and are working as designed in their specifications to minimize pollutant discharges. 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 in accordance with Part IB.1.c. 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. Inspection records must be retained in accordance with Part 11.0. and signed in accordance with Part I.A.3.f. At a minimum, the inspection report must include: i. the inspection date; Page 16 of 33 PART I Permit No.: COR400000 ii.name(s) and title(s) of personnel conducting the inspection; iii.weather conditions at the time of inspection; iv.phase of construction at the time of inspection; v.estimated acreage of disturbance at the time of inspection vi.location(s) of discharges of sediment or other pollutants from the site; vii.location(s) of control measures needing maintenance; viii.location(s) and identification of inadequate control measures; ix.location(s) and identification of additional control measures are needed that were not in place at the time of inspection; x.description of the minimum inspection frequency (either in accordance with Part I.D.2., I.D.3. or I.D.4.) utilized when conducting each inspection. xi.deviations from the minimum inspection schedule as required in Part I.D.2.; xii.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 report shall contain a statement as required in Part I.A. 3. f. 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 newor 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) 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. Page 17 of 33 PART I Permit No.: COR400000 (5) 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 maintenance to prevent a breach of the control measure. See also inadequate control measure. (6)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. (7)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. (8) 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. (9)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. See also Control Measure Requiring Routine Maintenance. (10)Infeasible -Not technologically possible, or not economically practicable and achievable in light of best industry practices. (11) 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. (12)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). (13)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; i.designed or used for collecting or conveying stormwater; ii.are not a combined sewer; and iii.are not part of a Publicly Owned Treatment Works (POTW). See 5 CCR 1002-61.2(62). (14)Municipal Stormwater Management Program -A stormwater program operated by a municipality, typically to meet the requirements of the municipalities MS4 discharge certification. Page 18 of 33 PARTI Permit No.: COR400000 (15)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.(e.g. the general contractor) (16)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). (17)Permittee(s) - The owner and operator named in the discharge certification issued under this permit for the construction site specified in the certification. (18)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). (19)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). (20)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. (21)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. (22)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. (23)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. (24)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. (25)Receiving Water -Any classified or unclassified surface water segment (including tributaries) in the State of Colorado into which stormwater associated with construction activities discharges. This definition includes all water courses, even if they are usually dry, such as borrow ditches, arroyos, and other unnamed waterways. (26)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). Page 19 of 33 PART I Permit No.: COR400000 (27) 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 Ill 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. (28)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. (29) Spill -An unintentional release of solid or liquid material which may pollute state waters. (30)State Waters -means 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 completed. (31)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. (32)Stormwater -Precipitation runoff, snow melt runoff, and surface runoff and drainage. See 5 CCR 1002-61.2(103). (33)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. (34)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). f I 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. Reporting procedures for any monitoring data collected will be included in the notification. If monitoring is required, the following applies: 1.the thirty (30) day average must be determined by the arithmetic mean of all samples collected during a thirty (30) consecutive-day period; and 2.a grab sample, for monitoring requirements, is a single "dip and take" sample. Page 20 of 33 G.Oil and Gas Construction PART I Permit No.: COR400000 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 21 of 33 Part II: Standard Permit Conditions A.DUTY TO COMPLY PART II Permit No.: COR400000 The permittee must comply with all conditions of this permit. Any permit noncompliance constitutes a violation of the Water Quality Control Act and is grounds for: a.enforcement action; b.permit termination, revocation and reissuance, or modification; or c.denial of a permit renewal application. B.DUTY TO REAPPLY If the permittee wishes to continue an activity regulated by this permit after the expiration date of this permit, the permittee must apply for and obtain authorization as required by Part I.A.3.k. of the permit. C.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 reduce the permitted activity in order to maintain compliance with the conditions of this permit. D.DUTY TO MITIGATE A permittee must take all reasonable steps to minimize or prevent any discharge in violation of this permit which has a reasonable likelihood of adversely affecting human health or the environment. E.PROPER OPERATION AND MAINTENANCE A 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 the permittee only when the operation is necessary to achieve compliance with the conditions of this permit. This requirement can be met by meeting the requirements for Part I.B., I.C., and I.D. above. See also 40 C.F.R. § 122.41 (e). F.PERMIT ACTIONS This permit may be modified, revoked and reissued, or terminated for cause. The permittee 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). G.PROPERTY RIGHTS In accordance with 40 CFR 122.41 (g) and 5 CCR 1002-61, 61.8(9): 1.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. Page 22 of 33 PART II Permit No.: COR400000 2.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. 3.Except for any toxic effluent standard or prohibition imposed under Section 307 of the Federal 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 Federal 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. H.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 CFR 122.41 (h) and/or Regulation 61.8(3)(q). I.INSPECTION AND ENTRY The permittee shall allow the division and the authorized representative, upon the presentation of credentials as required by law, to allow for inspections to be conducted in accordance with 40 CFR 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 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; 3.at reasonable times, inspect any monitoring equipment or monitoring method required in the permit; and 4.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 any violation of the Colorado Water Quality Control Act. The investigation may include: sampling of any discharges, stormwater or process water, taking of photographs, interviewing site staff on alleged violations and other matters related to the permit, and assessing any and all facilities or areas within the site that may affect discharges, the permit, or an alleged violation. The permittee shall provide access to the division or other authorized representatives upon presentation of proper credentials. A permittee's non-response to a request to enter upon presentation of credentials constitutes a denial of such request, and may result in a violation of the permit. J.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. Page 23 of 33 PART II Permit No.: COR400000 2.The permittee must 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 three years from the date the permit expires or the date the permittee's authorization is terminated. This period may be extended by request of the division at any time. 3.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. 4.Monitoring must be conducted according to test procedures approved under 40 CFR Part 136, unless other test procedures have been specified in the permit. K.SIGNATORY REQUIREMENTS 1.Authorization to Sign: All documents required to be submitted to the division by the permit must be signed in accordance with 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, 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 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 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. 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.(i) the chief executive officer of the agency, or Page 24 of 33 PART II Permit No.: COR400000 ii.(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) 2.Electronic Signatures For persons signing applications for coverage under this permit electronically, in addition to meeting other applicable requirements stated above, such signatures must meet the same signature, authentication, and identity-proofing standards set forth at 40 CFR § 3.2000(b) for electronic reports (including robust second-factor authentication). Compliance with this requirement can be achieved by submitting the application using the Colorado Environmental Online Service (CEOS) system. 3.Change in Authorization to Sign If an authorization is no longer accurate because a different individual or position has responsibility for the overall operation of the facility, a new authorization must be submitted to the division, prior to the re-authorization, or together with any reports, information, or applications to be signed by an authorized representative. l.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). 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 ). 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 in subparagraphs 5, 6, 7, and 8 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. This permit is not transferable to any person except after notice is given to the division. Page 25 of 33 PART II Permit No.: COR400000 a.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. b.The new owner or operator must submit an application. See also signature requirements in Part 11.K, above. •C. A permit may be automatically transferred to a new permittee if: i.The current permittee notifies the Division in writing 30 calendar days in advance of the proposed transfer date; and ii.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 iii.The division does not notify the existing permittee and the proposed new permittee of its intent to modify, or revoke and reissue the permit. iv.Fee requirements of the Colorado Discharge Permit System Regulations, Section 61.15, have been met. 4.Monitoring reports Monitoring results must be reported at the intervals specified in this permit per the requirements of 40 CFR 122.41 (l)(4). 5.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 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. 6.Twenty-four hour reporting In addition to the reports required elsewhere in this permit, 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: a.Circumstances leading to any noncompliance which may endanger health or the environment regardless of the cause of the incident; b.Circumstances leading to any unanticipated bypass which exceeds any effluent limitations in the permit; •C. Circumstances leading to any upset which causes an exceedance of any effluent limitation in the permit; Page 26 of 33 PART II Permit No.: COR400000 d.Daily maximum violations for any of the pollutants limited by Part I 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. ,e. The division may waive the written report required under subparagraph 6 of this section if the oral report has been received within 24 hours. 7.Other non-compliance A permittee must report all instances of noncompliance at the time monitoring reports are due. If no monitoring reports are required, these reports are due at least annually in accordance with Regulation 61.8(4)(p). The annual report must contain all instances of non-compliance required under either subparagraph 5 or subparagr aph 6 of this subsection. 8.Other information Where a 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 Permitting Authority, it has a duty to promptly submit such facts or information. M.BYPASS 1.Bypass not exceeding limitations The permittees 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 Part I1.M.2 of this permit. See 40 CFR 122.41 (m)(2). 2.Notice of bypass a.Anticipated bypass. If the permittee knows in advance of the need for a bypass, the permittee must submit prior notice, if possible at least ten days before the date of the bypass. ee 40 CFR §122.41 (m)(3)(i) and/or Regulation 61. 9(5)(c). b.Unanticipated bypass. The permittee must submit notice of an unanticipated bypass in accordance with Part I1.L.6. See 40 CFR §122.41 (m)(3)(ii) 3.Prohibition of Bypass Bypasses are prohibited and the division may take enforcement action against the permittee for bypass, unless: i.the bypass is unavoidable to prevent loss of life, personal injury, or severe property damage; Page 27 of 33 PART II Permit No.: COR400000 ii.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 iii.proper notices were submitted to the division. N.UPSET 1.Effect of an upset An upset constitutes an affirmative defense to an action brought for noncompliance with permit effluent limitations if the requirements of Part 11.N.2. of this permit are met. No determination made during administrative review of claims that noncompliance was caused by upset, and before an action for noncompliance, is final administrative action subject to judicial review in accordance with Regulation 61.8(3)(j). 2.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 specific cause(s) of the upset; b.the permitted facility was at the time being properly operated and maintained; and ,c. the permittee submitted proper notice of the upset as required in Part I1.L.6. (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. 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. 3.Burden of Proof In any enforcement proceeding, the permittee seeking to establish the occurrence of an upset has the burden of proof. 0.RETENTION OF RECORDS 1.Post-Expiration or Termination Retention 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 Page 28 of 33 PART II Permit No.: COR400000 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 at any time. 2.On-site Retention The permittee must retain an electronic version or hardcopy of the SWMP at the construction site from the date of the initiation of construction activities to the date of expiration or inactivation of permit coverage; unless another location, specified by the permittee, is approved by the division. P.REOPENER CLAUSE 1.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). 2.Water quality protection If there is evidence indicating that the stormwater discharges authorized by this permit cause, have the reasonable potential to cause or contribute to an excursion above any applicable water quality standard, the permittee may be required to obtain an individual permit, or the permit may be modified to include different limitations and/or requirements. Q.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. R.NOTIFICATION REQUIREMENTS 1 • Notification to Parties All notification requirements, excluding information submitted using the CEOS portal, shall be directed as follows: a.Oral Notifications, during normal business hours shall be to: Clean Water Compliance Section Water Quality Control Division Telephone: (303) 692-3500 b.Written notification shall be to: Clean Water Compliance Section Water Quality Control Division Colorado Department of Public Health and Environment WQCD-WQP-B2 4300 Cherry Creek Drive South Denver, CO 80246-1530 Page 29 of 33 S.RESPONSIBILITIES 1.Reduction, Loss, or Failure of Treatment Facility PART II Permit No.: COR400000 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. T.Oil and Hazardous Substance 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 CWA. U.Emergency Powers Nothing in this permit shall be construed to prevent or limit application of any emergency power of the division. V.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, 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 of this section shall bear the burden of proving its applicability. This section shall never be interpreted as preventing full disclosure of effluent data. W.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 Colorado Discharge Permit System Regulations 5 CCR 1002-61, Section 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. X.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 ninety (90) 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 Part I.A.3. i. Y.Section 307 Toxics If a toxic effluent standard or prohibition, including any applicable schedule of compliance specified, is established by regulation pursuant to Section 307 of the Federal 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 Page 30 of 33 PART II Permit No.: COR400000 shall institute proceedings to modify or revoke and reissue the permit to conform to the toxic effluent standard or prohibition Page 31 of 33 SECTION 4 SWMP 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 ................................................................................................. 15 6.5. REPORTABLE SPILL PROTOCOL ....................................................................................................... 16 7.0. SWMP IMPLEMENTATION ................................................................................................................... 17 7.1. INSPECTIONS ................................................................................................................................ 17 7.2. MAINTENANCE AND CORRECTIVE ACTIONS ..................................................................................... 18 7.3. REVIEW AND REVISION .................................................................................................................. 18 7.4. TRANSFER OF OWNERSHIP ............................................................................................................. 19 7.5. PERMIT TERMINATION ................................................................................................................... 19 7.6. RECORDS ...................................................................................................................................... 19 8.0. REFERENCES ...................................................................................................................................... 21 Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing February 2023 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 February 2023 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 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 February 2023 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 implicit duty of making major capital investment recommendations, and initiating and directing other comprehensive measures to assure long term environmental Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing February 2023 4 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 February 2023 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 northeast to southwest 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. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing February 2023 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 February 2023 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 February 2023 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 February 2023 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 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 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 Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing February 2023 10 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. 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. 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. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing February 2023 11 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. 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. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing February 2023 12 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 contracto r 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 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 c ans 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. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing February 2023 13 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. 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 draina ge 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 Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing February 2023 14 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. 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. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing February 2023 15 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. 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. Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing February 2023 16 • 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. 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 February 2023 17 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 February 2023 18 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 February 2023 19 • 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 February 2023 20 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). Stormwater Management Plan Lot 3, Country Club Corners Sixth Filing February 2023 21 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 4495170449519044952104495230449525044952704495290449531044951704495190449521044952304495250449527044952904495310493700 493720 493740 493760 493780 493800 493700 493720 493740 493760 493780 493800 40° 36' 31'' N 105° 4' 28'' W40° 36' 31'' N105° 4' 23'' W40° 36' 26'' N 105° 4' 28'' W40° 36' 26'' N 105° 4' 23'' WN 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) -Land Disturbance Tracking 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 3COUNTRY CLUB CORNERS 6TH FILING110,722 SFLOT 2COUNTRY CLUB CORNERS 6TH FILING47,546 SFLOT 1COUNTRY CLUBCORNERS 6TH FILING47,579 SFLOT 2COUNTRY CLUB CORNERS5TH FILINGPRIVATE PARKING LOTREVISIONS NO. REV.DATE REVISIONS DESCRIPTIONproject no.:approved by:checked by:drawn by:drawing no.:QA/QC by:date:OLSSON ASSUMES NORESPONSIBILITY FOR EXISTINGUTILITY LOCATIONS (HORIZONTALOR VERTICAL). THE EXISTINGUTILITIES SHOWN ON THISDRAWING HAVE BEEN PLOTTEDFROM THE BEST AVAILABLEINFORMATION. IT IS HOWEVERTHE RESPONSIBILITY OF THECONTRACTOR TO FIELD VERIFYTHE LOCATION OF ALL UTILITIESPRIOR TO THE COMMENCEMENTOF ANY CONSTRUCTIONACTIVITIES.NOTETHIS DOCUMENT HAS BEENRELEASED BY OLSSONASSOCIATES ONLY FOR REVIEWBY REGULATORY AGENCIES ANDOTHER PROFESSIONALS, AND ISSUBJECT TO CHANGE. THISDOCUMENT IS NOT TO BE USEDFOR CONSTRUCTION.www.olsson.comTEL 970.461.7733 Suite 200 Loveland, CO 80538 1880 Fall River Drive, UTILITY PLANS FOR LOT 3, COUNTRY CLUB CORNERS 6TH FILING FORT COLLINS, CO 2022021-04575CALL 2 BUSINESS DAYS IN ADVANCE BEFOREYOU DIG, GRADE, OR EXCAVATE FOR THEMARKING OF UNDERGROUND MEMBERUTILITIES.CALL UTILITY NOTIFICATIONCENTER OF COLORADOKnow what'sbelow.before you dig.CallR01.12.202323SIT AND STAY DOG BARof SILT FENCEORANGE CONSTRUCTIONFENCESLOPE DRAINVEHICLE TRACKING CONTROLWATTLESSTABILIZED STORAGE AREASEEDING & MULCHINGLIMIT OF DISTURBANCEEROSION CONTROL LEGENDSLOPE DIRECTIONWHEEL ROLLED BERMINLET PROTECTIONSEDIMENT BASINEROSION CONTROL BLANKETSTOCKPILE5EROSION CONTROL PLANS - PHASE 1 C3.0ROCK SOCKCONCRETE WASHOUTAREA LOT 3COUNTRY CLUB CORNERS 6TH FILING110,722 SFLOT 2COUNTRY CLUB CORNERS 6TH FILING47,546 SFLOT 1COUNTRY CLUBCORNERS 6TH FILING47,579 SFLOT 2COUNTRY CLUB CORNERS5TH FILINGPRIVATE PARKING LOTREVISIONS NO. REV.DATE REVISIONS DESCRIPTIONproject no.:approved by:checked by:drawn by:drawing no.:QA/QC by:date:OLSSON ASSUMES NORESPONSIBILITY FOR EXISTINGUTILITY LOCATIONS (HORIZONTALOR VERTICAL). THE EXISTINGUTILITIES SHOWN ON THISDRAWING HAVE BEEN PLOTTEDFROM THE BEST AVAILABLEINFORMATION. IT IS HOWEVERTHE RESPONSIBILITY OF THECONTRACTOR TO FIELD VERIFYTHE LOCATION OF ALL UTILITIESPRIOR TO THE COMMENCEMENTOF ANY CONSTRUCTIONACTIVITIES.NOTETHIS DOCUMENT HAS BEENRELEASED BY OLSSONASSOCIATES ONLY FOR REVIEWBY REGULATORY AGENCIES ANDOTHER PROFESSIONALS, AND ISSUBJECT TO CHANGE. THISDOCUMENT IS NOT TO BE USEDFOR CONSTRUCTION.www.olsson.comTEL 970.461.7733 Suite 200 Loveland, CO 80538 1880 Fall River Drive, UTILITY PLANS FOR LOT 3, COUNTRY CLUB CORNERS 6TH FILING FORT COLLINS, CO 2022021-04575CALL 2 BUSINESS DAYS IN ADVANCE BEFOREYOU DIG, GRADE, OR EXCAVATE FOR THEMARKING OF UNDERGROUND MEMBERUTILITIES.CALL UTILITY NOTIFICATIONCENTER OF COLORADOKnow what'sbelow.before you dig.CallR01.12.202323SIT AND STAY DOG BARof6EROSION CONTROL PLANS - PHASE 2 C3.1SILT FENCEORANGE CONSTRUCTIONFENCESLOPE DRAINVEHICLE TRACKING CONTROLWATTLESSTABILIZED STORAGE AREASEEDING & MULCHINGLIMIT OF DISTURBANCEEROSION CONTROL LEGENDSLOPE DIRECTIONWHEEL ROLLED BERMINLET PROTECTIONSEDIMENT BASINEROSION CONTROL BLANKETSTOCKPILEROCK SOCKCONCRETE WASHOUTAREA REVISIONS NO. REV.DATE REVISIONS DESCRIPTIONproject no.:approved by:checked by:drawn by:drawing no.:QA/QC by:date:OLSSON ASSUMES NORESPONSIBILITY FOR EXISTINGUTILITY LOCATIONS (HORIZONTALOR VERTICAL). THE EXISTINGUTILITIES SHOWN ON THISDRAWING HAVE BEEN PLOTTEDFROM THE BEST AVAILABLEINFORMATION. IT IS HOWEVERTHE RESPONSIBILITY OF THECONTRACTOR TO FIELD VERIFYTHE LOCATION OF ALL UTILITIESPRIOR TO THE COMMENCEMENTOF ANY CONSTRUCTIONACTIVITIES.NOTETHIS DOCUMENT HAS BEENRELEASED BY OLSSONASSOCIATES ONLY FOR REVIEWBY REGULATORY AGENCIES ANDOTHER PROFESSIONALS, AND ISSUBJECT TO CHANGE. THISDOCUMENT IS NOT TO BE USEDFOR CONSTRUCTION.www.olsson.comTEL 970.461.7733 Suite 200 Loveland, CO 80538 1880 Fall River Drive, UTILITY PLANS FOR LOT 3, COUNTRY CLUB CORNERS 6TH FILING FORT COLLINS, CO 2022021-04575CALL 2 BUSINESS DAYS IN ADVANCE BEFOREYOU DIG, GRADE, OR EXCAVATE FOR THEMARKING OF UNDERGROUND MEMBERUTILITIES.CALL UTILITY NOTIFICATIONCENTER OF COLORADOKnow what'sbelow.before you dig.CallR01.12.202323SIT AND STAY DOG BARof7EROSION CONTROL PLANS - PHASE 3 C3.2SILT FENCEORANGE CONSTRUCTIONFENCESLOPE DRAINVEHICLE TRACKING CONTROLWATTLESSTABILIZED STORAGE AREASEEDING & MULCHINGLIMIT OF DISTURBANCEEROSION CONTROL LEGENDSLOPE DIRECTIONWHEEL ROLLED BERMINLET PROTECTIONSEDIMENT BASINEROSION CONTROL BLANKETSTOCKPILEROCK SOCKCONCRETE WASHOUTAREA 3C1.2NOTES REVISIONS NO. REV.DATE REVISIONS DESCRIPTIONproject no.:approved by:checked by:drawn by:drawing no.:QA/QC by:date:OLSSON ASSUMES NORESPONSIBILITY FOR EXISTINGUTILITY LOCATIONS (HORIZONTALOR VERTICAL). THE EXISTINGUTILITIES SHOWN ON THISDRAWING HAVE BEEN PLOTTEDFROM THE BEST AVAILABLEINFORMATION. IT IS HOWEVERTHE RESPONSIBILITY OF THECONTRACTOR TO FIELD VERIFYTHE LOCATION OF ALL UTILITIESPRIOR TO THE COMMENCEMENTOF ANY CONSTRUCTIONACTIVITIES.NOTETHIS DOCUMENT HAS BEENRELEASED BY OLSSONASSOCIATES ONLY FOR REVIEWBY REGULATORY AGENCIES ANDOTHER PROFESSIONALS, AND ISSUBJECT TO CHANGE. THISDOCUMENT IS NOT TO BE USEDFOR CONSTRUCTION.www.olsson.comTEL 970.461.7733 Suite 200 Loveland, CO 80538 1880 Fall River Drive, UTILITY PLANS FOR LOT 3, COUNTRY CLUB CORNERS 6TH FILING FORT COLLINS, CO 2022021-04575CALL 2 BUSINESS DAYS IN ADVANCE BEFOREYOU DIG, GRADE, OR EXCAVATE FOR THEMARKING OF UNDERGROUND MEMBERUTILITIES.CALL UTILITY NOTIFICATIONCENTER OF COLORADOKnow what'sbelow.before you dig.CallR01.12.202323SIT AND STAY DOG BARof EROSION CONTROL NOTES:’“” ’ ’ ’“” 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 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 11 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 12 Regulatory Correspondence Pertinent correspondence from regulatory agencies relating to this project can be located here. SECTION 13 Notice of Termination Authorization for termination of the permit received from the CDPHE should be stored here once received.