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Home My WebLink AboutCHOICE CENTER FILING 3 (FORMERLY 1721 S. COLLEGE TOWNHOMES) - PDP - PDP160042 - SUBMITTAL DOCUMENTS - ROUND 2 - EROSION CONTROL LETTER/REPORTEROSION CONTROL REPORT: Choice Center Filing 3 1721 S. College Avenue Fort Collins, CO Prepared by: Kimley-Horn and Associates, Inc. 4582 South Ulster Street, Suite 1500 Denver, CO 80237 Contact: Bryce Christensen Prepared on: 02/07/2017 Choice Center Filing 3– Fort Collins, CO February 2017 Page 1 TABLE OF CONTENTS SWMP PREPARER CERTIFICATION 04 PERMITTEE / OPERATOR RESPONSIBILITIES 05 PERMITTEE CERTIFICATION 07 OPERATOR CERTIFICATION 08 CONTRACTOR CERTIFICATION 09 GENERAL REQUIREMENTS 10 INTRODUCTION AND PURPOSE 10 PERMIT COVERAGE AND APPLICATIONS 10 DEFINITIONS 10 SITE DESCRIPTION 11 GENERAL PROJECT DESCRIPTION 11 PROJECT CONTACTS 11 PROJECT LOCATION 12 VICINITY MAP 12 EXISTING SITE CONDITIONS 13 THREATENED AND EDANGERED SPECIES 13 WETLANDS 13 DRAINAGE CHARACTERISTICS 13 VEGETATION 13 SOILS 14 SITE AND DISTURBED AREAS 14 RAINFALL DATA 14 RECEIVING WATERS 14 PROPOSED SITE CONDITIONS 15 PROJECT DESCRIPTION 15 TOPOGRAPHY AND DRAINAGE CHARACTERISTICS 15 Choice Center Filing 3– Fort Collins, CO February 2017 Page 2 PROPOSED CONSTRUCTION ACTIVITIES 15 EROSION CONTROL PLAN REQUIREMENTS 16 STORMWATER MANAGEMENT CONTROLS 17 SWMP ADMINISTRATOR 17 SITE SPECIFIC POLLUTION SOURCES 17 IDENTIFICATION OF POLLUTANT SOURCES 17 BEST MANAGEMENT PRACTICES FOR STORMWATER POLLUTION PREVENTION 19 FINAL STABILIZATION AND LONG TERM STORMWATER MANAGEMENT 21 INSPECTION REQUIREMENTS 22 INSPECTION SCHEDULE REQUIREMENTS 22 INSPECTION PROCEDURES 22 BMP MAINTENANCE / REPLACEMENT AND FAILED BMPS 24 CONCLUSIONS 24 REFERENCES 25 APPENDIX 26 Choice Center Filing 3– Fort Collins, CO February 2017 Page 3 EXHIBITS APPENDIX A – EROSION CONTROL PLANS APPENDIX B – CITY OF FORT COLLINS PERMITS APPENDIX C – USFWS ENDANGERED SPECIES LISTING APPENDIX D – SOILS INFORMATION APPENDIX E – IDENTIFICATION OF POLLUTANT SOURCES APPENDIX F – BMP DETAILS APPENDIX G –BMP INSTALLATION LOG APPENDIX H – SWMP INSPECTION REPORTS APPENDIX I – BMP CORRECTIVE ACTION LOG APPENDIX J – SWMP AMENDMENT LOG APPENDIX K – EROSION AND SEDIMENT CONTROL ESCROW/SECURITY CALCULATION Choice Center Filing 3– Fort Collins, CO February 2017 Page 4 CERTIFICATIONS SWMP Preparer’s Certification This Stormwater Management Plan (SWMP) has been prepared by me, or under my direct supervision, in substantial accordance with the requirements of the City of Foty Collins (the City) Stormwater Criteria Manual. _____________________________________________________________________ Signature Date Name: Bryce Christensen Title: Project Manager Company Name: Kimley-Horn and Associates, Inc. Address: 4582 South Ulster Street City, State: Denver, CO 80237 Phone Number: 303-228-2300 Choice Center Filing 3– Fort Collins, CO February 2017 Page 5 Permittee/Contractor Responsibilities This Stormwater Management Plan (SWMP) is prepared for CORE Fort Collins 1751 College, LLC. (the “Site Developer”) to fulfill the erosion control requirements for the City of Fort Collins (the “City”) and the State of Colorado Department of Public Health and Environment (CDPHE) for the State on Campus – Phase 2 Project (the “Project”). This narrative, in conjunction with the Erosion Control Plans included in Appendix A, examines measures taken onsite to improve stormwater quality leaving the site, and also addresses important erosion control measures implemented prior to and during construction. A general overview of the procedures outlined in the SWMP which the Operator (the “Contractor”) shall follow is provided below for reference. Responsibility Operator 1. Submit the applicable City and CDPHE Permit Applications, copies of which is provided in the Appendices. ¨ 2. Complete the Permittee / Operator SWMP Certifications provided within the SWMP Narrative. ¨ 3. Complete the Operator / SWMP Administrator Contact Information identified in the SWMP Narrative. ¨ 4. Post the Site in accordance with the requirements identified on the Erosion Control Plans included in the appendices of this report. ¨ 5. Commence BMP installation and construction in accordance with the Phased BMP Implementation. ¨ 6. Schedule and Complete a Stormwater Management Pre- Construction Meeting. ¨ 7. Complete Land Disturbance / BMP / Site Stabilization Log, a copy of which is included in the appendices of this report. ¨ 8. Complete Inspections in accordance with the SWMP Inspection Schedule and Procedures outlined within the SWMP Narrative. ¨ Choice Center Filing 3– Fort Collins, CO February 2017 Page 6 9. Complete field maintenance or field modifications to Stormwater Management Practices based upon the results of the Inspection. ¨ 10. Maintain current records of the SWMP Inspections in accordance with the Inspection Record Keeping identified in the SWMP Narrative. ¨ 11. Maintain current records of the Land Disturbance / BMP / Site Stabilization Log, a copy of which is included in the appendices of this report. ¨ 12. Maintain current records of the BMP Corrective Action Log, a copy of which is included in the appendices of this report. ¨ 13. Maintain current records of the SWMP Amendment Log, a copy which is included in the appendices of this report. ¨ 14. Achieve Final Stabilization in accordance with the Final Stabilization practices outlined within the SWMP Narrative. ¨ 15. File the applicable City/CDPHE Construction Stormwater Inactivation Notice. ¨ This summary is provided for Permittee / Operator convenience only and shall not be considered all inclusive with respect to stormwater management responsibilities. The Permittee / Operator shall familiarize themselves with the City requirements and SWMP, and implement stormwater management strategies based upon the recommendations identified herein and varying site conditions Choice Center Filing 3– Fort Collins, CO February 2017 Page 7 Permittee Certification Form 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 the gathering of 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. _____________________________________ Signature Date Company Name: __________________________________________________________________ Address: _________________________________________________________________________ City, State: _______________________________________________________________________ Phone Number: ___________________________________________________________________ Choice Center Filing 3– Fort Collins, CO February 2017 Page 8 Operator Certification Form I certify under penalty of law that a complete Stormwater Management Plan, has been prepared for my activity. Based on inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the Stormwater Management Plan 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. _____________________________________ Signature Date Company Name: __________________________________________________________________ Address: _________________________________________________________________________ City, State: _______________________________________________________________________ Phone Number: ___________________________________________________________________ Choice Center Filing 3– Fort Collins, CO February 2017 Page 9 Contractor’s Certification Form (to be duplicated and signed by each contractor or subcontractor) 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 gathered and evaluated 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. _____________________________________ Signature Date Contractor’s Agent: ______________________________________________________________ Agent’s Title: ___________________________________________________________________ Contractor Company Name: _______________________________________________________ Address: _______________________________________________________________________ City, State: _____________________________________________________________________ Phone Number: _________________________________________________________________ Choice Center Filing 3– Fort Collins, CO February 2017 Page 10 GENERAL REQUIREMENTS INTRODUCTION AND PURPOSE This SWMP is provided to support the approval of the Stormwater Management Plan and the issuance of an Excavation Permit through the City. This Report, in conjunction with the Stormwater Management Plan Construction Drawings, provides a site and project understanding along with the guidelines for implementation and maintenance of erosion, sediment and stormwater quality control measures prior to and during construction of the Project. The primary goal of pollution prevention efforts during the project construction is to control sediment and pollutants that originate on the site and prevent them from flowing to surface waters. The purpose of this SWMP is to provide guidelines for achieving that goal. A successful pollution prevention program also relies upon careful inspection and adjustments during the construction process in order to enhance its effectiveness. This SWMP must be implemented before the construction begins on the site. It primarily addresses the impact of storm rainfall and runoff on areas of the ground surface disturbed during the construction process. In addition, there are recommendations for controlling other sources of pollution that could accompany the major construction activities. Applicabiity of this SWMP shall be terminated when disturbed areas are stabilized, permanent erosion controls are removed, construction activities covered herein have ceased. PERMIT COVERAGE AND APPLICATIONS Based upon a Site Disturbance Area of less than one (1) acre and being part of a larger common area (Choice Center Filing), this site will require approval by the City and stormwater coverage with the issuance of a Colorado Discharge Permit System (CDPS) - Stormwater Discharge Associated with Construction Activities Application (the General Permit) through the CDPHE. A copy of all applicable permits are included in Appendix B of this report. DEFINITIONS Operator – The group or individual that is responsible for day-to-day operations on the project site. The Operator will be assigned the SWMP Administrator role and these terms are used interchangeably in the SWMP. Site Developer – CORE SWMP – Construction Activities Stormwater Management Plan SWMP Administrator – The specific individual(s), position or title that is responsible for developing, implementing, maintaining and revising the SWMP. The activities and responsibilities of the Administrator shall address all aspects of the facility’s SWMP. The Operator will be assigned the SWMP Administrator role and these terms are used interchangeably in the SWMP. Choice Center Filing 3– Fort Collins, CO February 2017 Page 11 SITE DESCRIPTION GENERAL PROJECT DESCRIPTION Kimley-Horn and Associates, Inc., serves as the engineering consultant for CORE Fort Collins 1751 College, LLC. They are proposing to construct a 10-unit multi-family development at 1721 S College Avenue in Fort Collins, Colorado (Larimer County). The site work on the approximate 0.35 acre parcel includes demolition, grading, stormwater management, water, sanitary sewer, paving installation, and landscape improvements. PROJECT CONTACTS SWMP PREPARER Company: Kimley-Horn and Associates, Inc. Contact: Bryce Christensen, P.E. Address: 4582 South Ulster Street – Suite 1500 Denver, CO 80237 Phone: (303) 228-2300 Email: Bryce.Christensen@kimley-horn.com PERMITTEE Company: _____________________________________________________ Contact: _____________________________________________________ Address: _____________________________________________________ _____________________________________________________ Phone: _____________________________________________________ Email: _____________________________________________________ SWMP ADMINISTRATOR Company: _____________________________________________________ Contact: _____________________________________________________ Address: _____________________________________________________ _____________________________________________________ Phone: _____________________________________________________ Email: _____________________________________________________ Choice Center Filing 3– Fort Collins, CO February 2017 Page 12 PROJECT LOCATION The project is located in Choice Center on South College Avenue in Fort Collins, Colorado (the “Site”). More specifically, the Site consists of Lot 2, Choice Center, and Lot 1 Choice Center Filing situated in the city of Fort Collins, County of Larimer, State of Colorado. The site is generally bounded by the following: · North: Commercial/Retail Center (Choice Center) · East: South College Avenue · South: Multi-family residential buildings (Choice Center) · West: Multi-family residential buildings (Choice Center) VICINITY MAP Choice Center Filing 3– Fort Collins, CO February 2017 Page 13 EXISTING SITE CONDITIONS THREATENED AND ENDANGERED SPECIES In accordance with the US Department of the Interior Fish and Wildlife Service, Ecological Services, Colorado Field Offices list of Threatened, Endangered, Candidate and Proposed Species, printed January 2017, known threatened or endangered species for the Site are as follows: · Sterna Antillarum – Endangered · Strix Occidentalis Lucida – Threatened · Charadius Melodus – Threatened · Grus Americana – Endangered · Oncorhynchus Clarki Stomias – Threatened · Scaphirhynchus Albus – Endangered · Gaura Neomexicana Var. Coloradensis – Threatened · Phacelia Formosula – Endangered · Spiranthes Diluvialis – Threatened · Platanthera Praeclara – Threatened · Arsapnia Arapahoe – Candidate · Lynx Canadensis – Threatened · Gulo Gulo Luscus – Proposed Threatened · Zapus Hudsonius Preblei – Threatened There are no known threatened or endangered species within the project area. The USFW Endangered Species Listing is included in Appendix C of this report. WETLANDS There are no known wetlands/wetlands channels within the project area. However, there is an existing Flood Zone AE south and west of the site. DRAINAGE CHARACTERISTICS Once the Site is completely graded, the topography will generally drain from west to east of the Site. The site will also utilize an existing drainage flume located on site, that is to be improved. The developed site will consist of the following: · Highest Elevation: 4997.60’ · Lowest Elevation: 4986.50’ · Average Slopes: ±2% VEGETATION Once the Project takes over control of the Site, the existing ground cover will consist of recently disturbed soils and possible temporary seeding. The composite imperviousness of the existing site approximately is 95%. Choice Center Filing 3– Fort Collins, CO February 2017 Page 14 SOILS According to the USDA National Resources Conservation Service (NRCS) Soil Survey, the soils were found to consist primarily of Fort Collins loam and Altvan-Satanta loams. Onsite soils may be classified as having a Hydrologic Soil Group of C and B, respectively. Information regarding the project site soils is included in Appendix D of this report. SITE AND DISTURBED AREAS Site and disturbance areas anticipated for the project construction activities are indicted below: · Site Area: ±0.35 Acres · Disturbance Area: ±0.60 Acres These areas are as indicated on the Erosion Control Plan included in Appendix A. RAINFALL DATA Rainfall data was for the 24 hour rainfall was obtained from the Precipitation Frequency Data Server using NOAA Atlass 14, Volume 8 for the City of Fort Collins and is shown in the following table. Storm Frequency Rainfall Depth (Inches) 2-year 1.98 5-year 2.51 10-year 3.04 25-year 3.93 50-year 4.72 100-year 5.61 RECEIVING WATERS Receiving waters were determined using the City MS4 Permit. · Immediate Receiving Waters – City of Fort Collins Spring Creek · Ultimate Receiving Waters – Cache La Poudre River and Fossil Creek Reservoir Choice Center Filing 3– Fort Collins, CO February 2017 Page 15 PROPOSED SITE CONDITIONS PROJECT DESCRIPTION The proposed project includes 10-unit multi-family development with a new drive connection to College Avenue and the adjacent parcel to the north. Runoff for the site will primarily be directed to the proposed pervious paver system located between the east and west multi-family buildings. Roof drains for the proposed buildings will discharge on the surface, directing flow to the pervious pavers. An underdrain is proposed for the pavers system, routing flow to an 8” storm sewer along the south end of the site. This storm sewer will discharge flow into the drainage channel along the west property line. Adequate provisions will also be made to pass a major storm event (100-year storm) through the development. Since there is a net decrease in percent impervious from existing conditions to proposed, detention will not be required for the development with respect to stormwater release. TOPOGRAPHY AND DRAINAGE CHARACTERISTICS The Site is being graded to direct flow offsite. The majority of runoff will be routed through a permable paver system to the storm sewer at the south end of the site, discharging into an existing storm sewer system within Choice Center Drive. PROPOSED CONSTRUCTION ACTIVITIES The operator shall utilize the following general construction practices which are required throughout the project at locations shown on the SWMP or as dictated by construction activities. · Materials handling and spill prevention · Waste management and disposal · Hazardous material storage and containment area · Vehicle maintenance fueling and storage · Solid waste containment facility · Sanitary waste facility · Street Sweeping (SS) · SWMP Information Sign (S) These practices shall remain active and operational throughout the duration of construction and be identified on the SWMP. Due to any phasing required for the Project, it is understood that these BMPs may be relocated as needed to facilitate construction operations. The Operator shall locate and identify the original and current location of these BMPs on the SWMP throughout the construction of the Project. General construction sequencing and activities associated with this Project consist of the following: 1. Prepare and submit the City of Fort Collins Excavation Permit and the CDPHE Construction Stormwater Discharge Permit as required. A copy of the permit(s) shall be provided to the Site Developer upon receipt from the City/CDPHE. 2. Install SWMP Information Sign (S) in accordance with applicable City, State, and Site Developer requirements. 3. Install Vehicle Tracking Control (VTC). Choice Center Filing 3– Fort Collins, CO February 2017 Page 16 4. Prepare Stabilized Staging Area (SSA). Contractor shall coordinate location with the Overall Developer and note the actual size and location of this area. 5. Install and denote on the plan any of the following areas: trailer, parking, lay down, porta- potty, wheel wash, concrete washout, mason's area, fuel and material storage containers, solid waste containers, etc. 6. Install perimeter controls including Silt Fence (SF) and Rock Sock Perimeter Control (RS) around limits as shown on plan. Ensure that the Limits of Construction (LOC) are defined as necessary or known by all parties which will be responsible for construction on the Site. Construction Fence (CF) shall also be installed and modified, if applicable, on the plan. Limits of Construction may be located outside of this construction fence. 7. Install Curb Socks (CS) for existing stormwater conveyance facilities as indicated on the Erosion Control Plans or as necessitated by field conditions. 8. Upon completion of the initial BMP installation the Operator shall schedule a Pre-Construction Meeting with the City and Site Developer to confirm BMPs installed are adequate prior to proceeding with additional land disturbing activities. 9. Install Concrete Washout Area (CWA) prior to construction of concrete improvements. 10. Install utilities, storm sewers, curb and gutters. 11. Begin fine grading the Site. Stockpile materials in accordance with the Soil Stockpile Management (SP) BMP. Permanently stabilize areas to be vegetated as they are brought to final grade. 12. Start construction of building pad and structures. 13. Complete grading and installation of Permanent Stabilization (PS) over all areas in accordance with approved Landscape Plans. 14. Remove remaining BMPs once Permanent Stabilization has been achieved and accepted by City Inspector. Repair and stabilize areas disturbed through BMP removal. 15. Notify the Site Developer of intent to file the Notice of Inactivation with the City/CDPHE and receive Site Developer acceptance to proceed with stormwater management close-out. 16. Notify the City/CDPHE of the intent to file the Notice of Inactivation and receive City/CDPHE acceptance prior to proceeding with filing the Notice of Inactivation. 17. Proceed with filing the Notice of Inactivation. 18. Provide the Site Developer with a copy of all stormwater documentation (permits, inspection reports, logs, etc.) upon completion of project stormwater Notice of Inactivation. EROSION CONTROL PLAN REQUIREMENTS The Erosion Control Plans for this project is included within Appendix A of this report and meets the following minimum requirements: · Construction Site Boundaries · Identification of Ground Surface Disturbance · Areas of Cut / Fill · Areas of Storage of Building Materials, Equipment, Soil or Waste · Location of Dedicated Asphalt or Concrete Batch Plants · Location of Structural BMPs · Location of Non-Structural BMPs · Location of Springs, Streams, Wetlands or other Surface Waters (As Applicable) Choice Center Filing 3– Fort Collins, CO February 2017 Page 17 STORMWATER MANAGEMENT CONTROLS SWMP ADMINISTRATOR The SWMP Administrator is the Operator selected for the project. The SWMP Administrator is responsible for developing, implementing, maintaining and revising the SWMP. The activities and responsibilities of the Administrator shall address all aspects of the facility’s SWMP. SITE SPECIFIC POLLUTION SOURCES Further identification of site specific pollutants that fall within the categories outlined in the next section may be field noted using the corresponding log included in the appendices of this report. The logs are intended to record site specific pollutants, the date of arrival on the site, the date removed from the site, and the methods of treatment. IDENTIFICATION OF POLLUTANT SOURCES Evaluation of general sediment and non-sediment pollution sources associated with site construction activities, as outlined within the State General Permit, consist of the following: · Disturbed and Stored Soils – Earth disturbing activities (grading, excavation, etc.) will be necessary for this project; therefore, the potential exists for disturbed site soils to contribute sediment to stormwater discharges. Recommended BMPs are identified below: o Silt Fence o Temporary Seeding o Permanent Stabilization o Inlet Protection o Rock Socks o Street Sweeping · Vehicle Tracking and Sediment – Construction traffic will be entering and exiting the Site; therefore, the potential exists for vehicle tracking to contribute sediment to stormwater discharges. Recommended BMPs are identified below: o Rock Socks o Street Sweeping o Vehicle Tracking Control o Stabilized Staging Area o Stockpile Management · Management of Contaminated Soils – Contaminated soils are not anticipated on this Site. If encountered, the SWMP Administrator shall take appropriate containment and treatment measures. · Loading and Unloading Operations – Loading and unloading operations will be taking place at the Site; therefore, the potential exists for these operations to introduce sediment and non- sediment pollutants to stormwater discharges. Recommended BMPs are identified below: o Covering Outdoor Storage and Handling Areas o Good Housekeeping Practices Choice Center Filing 3– Fort Collins, CO February 2017 Page 18 · Outdoor Storage of Materials – Limited outdoor storage of materials is anticipated with construction of this site; however, outdoor storage of chemicals, fertilizers, etc. is not anticipated. Recommended BMPs are identified below: o Covering Outdoor Storage and Handling Areas o Good Housekeeping Practices o Spill Prevention Containment and Control · Vehicle and Equipment Maintenance and Fueling – Routine maintenance and fueling of vehicles and equipment is anticipated with this Site; therefore, the potential exists for pollutants associated with these activities to contribute pollutants to stormwater discharges. Recommended BMPs are identified below: o Vehicle Equipment Maintenance and Fueling · Significant Dust or Particulate Generating Processes – Earth disturbing activities (grading, excavation, etc.) will be necessary for this project; therefore, the potential exists for windblown site soils to contribute sediment to stormwater discharges. Recommended BMPs are identified below: o Wind Erosion / Dust Control · Routine Maintenance – Routine maintenance involving fertilizers, pesticides, detergents, fuels, solvents, oils, etc., other than those identified within Vehicle and Equipment Maintenance and Fueling are not anticipated with this project. If encountered, the SWMP Administrator shall take appropriate containment and treatment measures. Recommended BMPs are identified below: o Preventative Maintenance · Onsite Waste Management – Waste management consisting of solid waste piles, liquid wastes, dumpsters, etc. are anticipated onsite; therefore, the potential exists for these operations to introduce sediment and non-sediment pollutants to stormwater discharges. Recommended BMPs are identified below: o Good Housekeeping · Concrete Truck / Equipment Washing – Concrete truck and equipment washing are anticipated with this project. The SWMP Administrator shall take appropriate containment and treatment measures. Recommended BMPs are identified below: o Concrete Washout Area · Dedicated Asphalt and Concrete Batch Plants – Dedicated asphalt and/or concrete batch plants are not anticipated with this project. If encountered, the SWMP Administrator shall take appropriate containment and treatment measures and document as necessary. · Non-Industrial Waste Sources – Non-Industrial waste sources limited to portable sanitary facilities are anticipated with this project. Recommended BMPs are identified below: o Good Housekeeping · Additional Pollutant Sources – Additional areas or procedures where potential spills could occur are not anticipated with this project. Logs for the identification of pollutant sources are included in Appendix E for reference and use. Based on the following, the potential to contribute pollutants to stormwater discharges is not significant for most of the pollutants identified above: Choice Center Filing 3– Fort Collins, CO February 2017 Page 19 · Relatively Low Frequency of the Activities · The Ability to Schedule Activities During Dry Weather · Existing Site Topography · The Ability to Implement Primary and Secondary Containment for Product Storage · The Ability to Locate Activities Away from Drainage Ways BEST MANAGEMENT PRACTICES FOR STORMWATER POLLUTION PREVENTION STRUCTURAL PRACTICES FOR EROSION AND SEDIMENT CONTROL Structural BMPs shall be implemented onsite to minimize erosion and sediment transport. Recommended BMPs based upon a limited site review may be seen within the Erosion Control Plan included in the appendices of this report. Additional BMPs shall be implemented by the SWMP Administrator if necessary to prevent sediment laden runoff from leaving the project site. The SWMP and Erosion Control Plan shall be updated to reflect any changes or revisions enacted in the field. Details of the BMPs proposed for the Site are included in Appendix F. NON-STRUCTURAL PRACTICES FOR EROSION AND SEDIMENT CONTROL Non-Structural BMPs shall be implemented onsite to minimize erosion and sediment transport. Recommended BMPs based upon a limited site review may be seen within the Erosion Control Plan included in the appendices of this report. Additional BMPs shall be implemented by the SWMP Administrator if necessary to prevent sediment laden runoff from leaving the project site. The SWMP and Erosion Control Plan shall be updated to reflect any changes or revisions enacted in the field. Details of the BMPs proposed for the Site are included in Appendix F. PHASED BMP IMPLEMENTATION Since the existing site is in an undeveloped condition, construction of the identified improvements will take place under one phase of construction as identified within the construction sequencing included within this report. A Land Disturbance, BMP Installation, and Stabilization Log is provided in Appendix G and shall be filled out accordingly during BMP implementation. MATERIALS HANDLING AND SPILL PREVENTION Any hazardous or potentially hazardous material that is brought onto the construction site shall be handled properly in order to reduce the potential for stormwater pollution. In an effort to minimize the potential for a spill of petroleum product or hazardous materials to come in contact with stormwater, the following steps shall be implemented: · Material Safety Data Sheets (MSDS) information shall be kept on site for any and all applicable materials. · All materials with hazardous properties (such as pesticides, petroleum products, fertilizers, detergents, construction chemicals, acids, paints, paint solvents, additives for soil stabilization, concrete, curing compounds and additives, etc.) shall be stored in a secure location, under cover and in appropriate, tightly sealed containers when not in use. Choice Center Filing 3– Fort Collins, CO February 2017 Page 20 · The minimum practical quantity of all such materials shall be kept on the job site and scheduled for delivery as close to time of use as practical. · A spill control and containment kit shall be provided on the construction site and location(s) shown on the Erosion Control Plan. · All of the product in a container shall be used before the container is disposed of. All such containers shall be triple rinsed, with water prior to disposal. The rinse water used in these containers shall be disposed of in a manner in compliance with State and Federal regulations and shall not be allowed to mix with stormwater discharges. · All products shall be stored in and used from the original container with the original product label and used in strict compliance with the instructions on the product label. · The disposal of excess or used products shall be in strict compliance with instructions on the product label. If utilized, temporary onsite fuel tanks for construction vehicles shall meet all state and federal regulations. Tanks shall have approved spill containment with the capacity required by the applicable regulations. From NFPA 30: All tanks shall be provided with secondary containment (i.e. containment external to and separate from primary containment). Secondary containment shall be constructed of materials of sufficient thickness, density and composition so as not to be structurally weakened as a result of contact with the fuel stored and capable of containing discharged fuel for a period of time equal to or longer than the maximum anticipated time sufficient to allow recovery of discharged fuel. The tanks shall be in sound condition free of rust or other damage which might compromise containment. Fuel storage areas shall meet all Environmental Protection Agency (EPA), OSHA and other regulatory requirements for signage, fire extinguisher, etc. Hoses, valves, fittings, caps, filler nozzles and associated hardware shall be maintained in proper working condition at all times. The location of fuel tanks shall be shown on the Erosion Control Plan and shall be located to minimize exposure to weather and surface water drainage features. The Operator shall develop and implement a Materials Handling and Spill Prevention Plan (MHSPP) in accordance with the EPA and State of Colorado requirements. In the event of an accidental spill, immediate action shall be undertaken by the Operator to contain and remove the spilled material. All hazardous materials, including contaminated soil, shall be disposed of by the Operator in the manner specified by federal, state and local regulations and by the manufacturer of such products. As soon as possible, the spill shall be reported to the appropriate agencies. As required under the provisions of the Clean Water Act, any spill or discharge entering waters of the United States shall be properly reported. The Operator shall prepare a written record of any spill and associated clean-up activities of petroleum products or hazardous materials in excess of 1 gallon or reportable quantities, whichever is less. Any spills of petroleum products or hazardous materials in excess of Reportable Quantities as defined by EPA or the state or local agency regulations, shall be immediately reported to the Colorado Department of Public Health and Environment spill reporting lines. · CDPHE Environmental Release and Incident Reporting Line (877) 518-5608. For reference, a bulletin on Environmental Spill Reporting published by the CDPHE, has been included in Appendix H of this report. Choice Center Filing 3– Fort Collins, CO February 2017 Page 21 VEHICLE TRACKING AND DUST CONTROL Vehicle Tracking Control BMPs (structural and non-structural) shall be implemented in order to control potential sediment discharges from vehicle tracking. Practices shall be implemented for all areas of potential vehicle tracking which include, but are not limited to reduced site access and utilization of designated haul routes. Areas of soil that are denuded of vegetation and have little protection from particles being picked up and carried by wind should be protected with a temporary cover or kept under control with water or other soil adhering products to limit wind transported particles exiting the site perimeter. WASTE MANAGEMENT AND DISPOSAL An effective first step towards preventing pollution in stormwater from work sites involves using a common sense approach to improve the facility’s basic housekeeping methods. Poor housekeeping practices result in increased waste and potential for stormwater contamination. No solid materials are allowed to be discharged from the site with stormwater. All solid waste, including disposable materials incidental to the construction activities, must be collected and placed in containers. Secure covers for the containers shall be provided at all times to meet state and local requirements. The location of solid waste receptacles shall be identified on the Erosion Control Plan by the Operator. Concrete waste is anticipated with this project; and therefore, a dedicated concrete washout is required. The SWMP Administrator shall take appropriate containment and treatment measures and document as necessary. GROUNDWATER AND STORMWATER DEWATERING Except as noted below, all discharges covered by this permit shall be composed entirely of stormwater associated with construction activity. · Emergency Fire Fighting Activities · Uncontaminated Spring Water · Landscape Irrigation Return Flow Groundwater dewatering is not anticipated. If encountered, the operator shall file for appropriate permits with the CDPHE. FINAL STABILIZATION AND LONG TERM STORMWATER MANAGEMENT In the natural condition, the site soil is stabilized by means of native vegetation. Therefore, the final stabilization technique to be used at this project for stabilizing soils shall be to provide a protective cover of native vegetation, gravel road base, and granular stabilization material. Seeding should be conducted after final grade is achieved and soils are prepared to take advantage of soil moisture and seed germination. The SWMP Administrator should evaluate the short and long-term forecasts prior to applying permanent seed. Choice Center Filing 3– Fort Collins, CO February 2017 Page 22 Final site stabilization is achieved when vegetative cover provides permanent stabilization with a density greater than 70 percent of the pre-disturbance levels, or equivalent permanent, physical erosion reduction methods have been employed over the entire area to be stabilized by vegetative cover. This area is exclusive of areas that are covered with rock (crushed granite, gravel, etc.) or landscape mulch, paved or have a building or other permanent structure on them. INSPECTION REQUIREMENTS INSPECTION SCHEDULE REQUIREMENTS A thorough inspection of the stormwater management system shall be performed and documented at least every 14 days and within after each runoff event. If more frequent inspections are required to ensure that BMPs are properly maintained and operated, the inspection schedule shall be modified to meet this need. INSPECTION PROCEDURES A thorough inspection of the stormwater management system shall be performed and documented at least every 14 days and within after each runoff event. If more frequent inspections are required to ensure that BMPs are properly maintained and operated, the inspection schedule shall be modified to meet this need. The inspection shall include observations of: · The Construction Site Perimeter and Discharge Points; · All Disturbed Areas; · Areas Used for Material / Waste Storage That are Exposed to Precipitation; · Other Areas Determined to Have a Significant Potential for Stormwater Pollution; · Erosion and Sediment Control Measures Identified in the SWMP; and · Any Other Structural BMPs That May Require Maintenance. The inspection must determine if there is evidence of, or the potential for, pollutants entering the drainage system. BMPs should be reviewed to determine if they still meet the design intent and operational criteria in the SWMP and if they continue to adequately control pollutants at the site. Any BMPs not operating in accordance with the SWMP must be addressed as soon as possible, immediately in most cases, to minimize the discharge of pollutants and the SWMP must be updated and inspections must be documented. Examples of specific items to evaluate during site inspections are listed below. This list is not intended to be comprehensive. During each inspection, the inspector shall evaluate overall pollutant control system performance as well as particular details of individual system components. Additional factors should be considered as appropriate to the circumstances. · Vehicle Tracking Control - Locations where vehicles enter and exit the site shall be inspected for evidence of offsite sediment tracking. Exits shall be maintained as necessary to prevent Choice Center Filing 3– Fort Collins, CO February 2017 Page 23 the release of sediment from vehicles leaving the site. Any sediment deposited on the adjacent roadway shall be removed as necessary throughout the day or at the end of every day and disposed of in an appropriate manner. Sediment shall not be washed into storm sewer systems. · Erosion Control Devices - Rolled erosion control products (nets, blankets, turf reinforcement mats) and marginally vegetated areas (areas not meeting required vegetative densities for final stabilization) must be inspected frequently. Rilling, rutting and other signs of erosion indicate the erosion control device is not functioning properly and additional erosion control devices are warranted. · Sediment Control Devices - Sediment barriers (silt fence, sediment control logs, etc.), traps and basins must be inspected and they must be cleaned out at such time as their original capacity has been reduced by 50 percent. All material excavated from behind sediment barriers or in traps and basins shall be incorporated into onsite soils or spread out on an upland portion of the site and stabilized. To minimize the potential for sediment releases from the Project, site perimeter control devices shall be inspected with consideration given to changing up-gradient conditions. · Material Storage Areas - Material storage areas should be located to minimize exposure to weather. Inspections shall evaluate disturbed areas and areas used for storing materials that are exposed to rainfall for evidence of, or the potential for, pollutants entering the drainage system or discharging from the site. If necessary, the materials must be covered or original covers must be repaired or supplemented. Also, protective berms must be constructed, if needed, in order to contain runoff from material storage areas. All state and local regulations pertaining to material storage areas shall be adhered to. · Vegetation - Seed/Sod shall be free of weedy species and appropriate for site soils and regional climate. Seeding, sodding, tacking, and mulching shall be completed, in accordance with the requirements outlined within the Project Manual and locations identified within the plans, immediately after topsoil is applied and final grade is reached. Grassed areas shall be inspected to confirm that a healthy stand of grass is maintained. Rip-rap, mulch, gravel, decomposed granite or other equivalent permanent stabilization measures may be employed in lieu of vegetation based on site-specific conditions and Site Developer approval. · Discharge Points - All discharge points must be inspected to determine whether erosion and sediment control measures are effective in preventing discharge of sediment from the site or impacts to receiving waters. All necessary maintenance and repair shall be completed immediately. The inspection reports must be completed after each inspection. An important aspect of the inspection report is the description of additional measures that need to be taken to enhance plan effectiveness. The inspection report must identify whether the site was in compliance with the SWMP at the time of inspection and specifically identify all incidents of non-compliance. The SWMP Administrator shall ensure that, at a minimum, the following is recorded for each inspection and kept onsite for reference: · Inspection Date Choice Center Filing 3– Fort Collins, CO February 2017 Page 24 · Name(s) and Title(s) of Inspection Personnel · Location(s) of Discharges of Sediment and Other Pollutants from the Site · Location(s) of BMPs Requiring Maintenance · Location(s) of Failed BMPs · Location(s) of Additional Required BMPs · Deviations from the Minimum Inspections Schedule (If Applicable) · Description of Corrective Actions · Certification of SWMP Compliance after adequate corrective action(s) taken, or where a report does not identify any incidents requiring corrective action, this certification shall be made by the inspector indicating compliance with the permit The use and maintenance of log books, photographs, field notebooks, drawings or maps should also be included in the SWMP records when appropriate. Copies of the Inspection Form and BMP Corrective Action Log have been included in Appendix I and Appendix J for reference and use. BMP MAINTENANCE / REPLACEMENT AND FAILED BMPS Site inspection procedures noted above must address maintenance of BMPs that are found to no longer function as needed and designed, as well as preventive measures to proactively ensure continued operation. The SWMP Administrator shall implement a preventative maintenance program to ensure that BMP breakdowns and failures are handled proactively. Site inspections should uncover any conditions which could result in the discharge of pollutants to storm sewers and surface waters and shall be rectified. For example, sediment shall be removed from silt fences on a regular basis to prevent failure of the BMP. Sediment shall be removed to an appropriate location so that it will not become an additional pollutant source. The inspection process must also include replacement of BMPs when needed or the addition of new BMPs in order to adequately manage the pollutant sources at the site. Any BMP deficiencies, replacement or additional BMPs that may be required shall be documented on the Erosion Control Plans and on the appropriate Inspection Form. If amendments to the SWMP are required, these amendments shall be documented on the SWMP Amendment Log included in Appendix J for reference and use. CONCLUSIONS Temporary erosion control measures and BMPs will enhance stormwater quality within the project area by capturing and detaining sediment-laden runoff prior to discharging off-site. Choice Center Filing 3– Fort Collins, CO February 2017 Page 25 REFERENCES City of Fort Collins Amendments to the Urban Drainage and Flood Control District Criteria Manual – As referenced in Section 26-500 (c) of the Code of the City of Fort Collins; Revised Colorado Discharge Permit System (CDPS) – Stormwater Discharge Associated with Construction Activities Application - Prepared by Water Quality Control Division, Colorado Department of Public Health and Environment; Revised April 2011. NRCS Web Soil Survey - Website: https://websoilsurvey.nrcs.usda.gov/app/WebSoilSurvey.aspx. Precipitation-Frequency Atlas of the Western United States - NOAA ATLAS 14, Volume VIII, Version 2-Fort Collins, Colorado, USA. Prepared by the US Department of Commerce, National Oceanic and Atmospheric Administration and National Weather Service. Stormwater Discharges Associated with Construction Activity – Stormwater Management Plan Preparation Guidance - Prepared by Water Quality Control Division, Colorado Department of Public Health and Environment; Revised April 2011. Threatened, Endangered, Candidate and Proposed Species - Prepared by US Department of the Interior, Fish and Wildlife Services, Ecological Services, Colorado Field Offices; printed January 2017. Urban Storm Drainage Criteria Manual – Volume 3 – Prepared by the Urban Drainage and Flood Control District; Current Revision November 2010. Choice Center Filing 3– Fort Collins, CO February 2017 Page 26 APPENDIX Exhibit A – Erosion Control Plan & Details Exhibit B – Colorado Department of Public Health and Environment Permit STORMWATER DISCHARGE ASSOCIATED WITH CONSTRUCTION ACTIVITIES APPLICATION COLORADO DISCHARGE PERMIT SYSTEM (CDPS) PHOTO COPIES, FAXED COPIES, PDF COPIES OR EMAILS WILL NOT BE ACCEPTED. For Applications submitted on paper - Please print or type. Original signatures are required. All items must be completed accurately and in their entirety for the application to be deemed complete. Incomplete applications will not be processed until all information is received which will ultimately delay the issuance of a permit. If more space is required to answer any question, please attach additional sheets to the application form. Applications or signature pages for the application may be submitted by mail or hand delivered to: Colorado Department of Public Health and Environment, 4300 Cherry Creek Drive South, WQCD-P-B2, Denver, CO 80246-1530 For Applications submitted electronically Please note that you can ONLY complete the feedback form by downloading it to a PC or Mac/Apple computer and opening the Application with Adobe Reader or a similar PDF reader. The form will NOT work with web browsers, Google preview, Mac preview software or on mobile devices using iOS or Android operating systems. If application is submitted electronically, processing of the application will begin at that time and not be delayed for receipt of the signed document. Any additional information that you would like the Division to consider in developing the permit should be provided with the application. Examples include effluent data and/or modeling and planned pollutant removal strategies. Beginning July 1, 2016, invoices will be based on acres disturbed. DO NOT PAY THE FEES NOW Invoices will be sent after the receipt of the application. Disturbed Acreage for this application (see page 4) Less than 1 acre ($83 initial fee, $165 annual fee) 1-30 acres ($175 initial fee, $350 annual fee) Greater than 30 acres ($270 initial fee, $540 annual fee) Responsible Person (Title): PERMIT INFORMATION Reason for Application: NEW CERT RENEW CERT EXISTING CERT# Applicant is: Property Owner Contractor/Operator A. CONTACT INFORMATION - *indicates required * PERMITTED ORGANIZATION FORMAL NAME: 1) * PERMIT OPERATOR - the party that has operational control over day to day activities - may be the same as owner. Currently Held By (Person): FirstName: LastName: Telephone: Email Address: Organization: Mailing Address: City: State: Zip Code: Per Regulation 61 : All reports required by permits, and other information requested by the Division shall be signed by the permittee or by a duly authorized representative of that person. A person is a duly authorized representative only if: (i) The authorization is made in writing by the permittee (ii) The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position); and (iii) The written authorization is submitted to the Division SW Construction Application for: page 1 of 5 ASSIGNED PERMIT NUMBER _____________________________ Date Received _____/_____/_____ MM DD YYYY Revised: 3-2016 ì ì ì Ý±®» Ú±®¬ Ý±´´·² ïéëï Ý±´´»¹»ô ÔÔÝ Í»²·±® Ü»ª»´±°³»²¬ Ó¿²¿¹»® Ó¿®µ Ù±»¸¿«»² øééí÷ çêçóëéìè ³¿®µ¹à½±®»°¿½»ò½±³ Ý±®» Ú±®¬ Ý±´´·² ïéëï Ý±´´»¹»ô ÔÔÝ îîíì Éò Ò±®¬¸ ßª»²«» Ý¸·½¿¹± ×Ô êðêìé Ý±®» Ú±®¬ Ý±´´·² ïéëï Ý±´´»¹»ô ÔÔÝ Responsible Person (Title): 2) OWNER - party has ownership or long term lease of property - may be the same as the operator. Currently Held By (Person): FirstName: LastName: Telephone: Email Address: Organization: Mailing Address: City: State: Zip Code: Same as 1) Permit Operator Per Regulation 61 : All reports required by permits, and other information requested by the Division shall be signed by the permittee or by a duly authorized representative of that person. A person is a duly authorized representative only if: i. The authorization is made in writing by the permittee. ii. The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a named position); and iii. The written authorization is submitted to the Division. Responsible Person (Title): Currently Held By (Person): FirstName: LastName: Telephone: Email Address: Organization: Mailing Address: City: State: Zip Code: Same as 1) Permit Operator 4) *BILLING CONTACT if different than the permittee. 3) *SITE CONTACT local contact for questions relating to the facility & discharge authorized by this permit for the facility Responsible Person (Title): Currently Held By (Person): FirstName: LastName: Telephone: Email Address: Organization: Mailing Address: City: State: Zip Code: Same as 1) Permit Operator SW Construction Application for: page 2 of 5 Responsible Person (Title): 5) OTHER CONTACT TYPES (check below) Add pages if necessary: Currently Held By (Person): FirstName: LastName: Telephone: Email Address: Organization: Mailing Address: City: State: Zip Code: Environmental Contact Inspection Facility Contact Consultant Compliance Contact Stormwater MS4 Responsible Person Stormwater Authorized Representative ì Í»²·±® Ü»ª»´±°³»²¬ Ó¿²¿¹»® Ó¿®µ Ù±»¸¿«»² øééí÷ çêçóëéìè ³¿®µ¹à½±®»°¿½»ò½±³ Ý±®» Ú±®¬ Ý±´´·² ïéëï Ý±´´»¹»ô ÔÔÝ îîíì Éò Ò±®¬¸ ßª»²«» Ý¸·½¿¹± ×Ô êðêìé Ý·ª·´ Û²¹·²»»®·²¹ Ý±²«´¬¿²¬ ó Ð®±¶»½¬ Ó¿²¿¹»® Ô»´»§ Ò»¬¦»® øêíð÷ ìèéóëëëë ´»´»§ò²»¬¦»®àµ·³´»§ó¸±®²ò½±³ Õ·³´»§óØ±®² ¿²¼ ß±½·¿¬»ô ×²½ò ïððï É¿®®»²ª·´´» Î±¿¼ô Í«·¬» íëð Ô·´» ×Ô êðëíî Ý·ª·´ Û²¹·²»»®·²¹ Ý±²«´¬¿²¬ ó Ð®±º»·±²¿´ Û²¹·²»»® B) PERMITTED PROJECT/FACILITY INFORMATION Latitude Project/Facility Name Street Address or Cross Streets (e.g., Park St and 5 Ave; CR 21 and Hwy 10; 44 Ave and Clear Creek) ; A street name without an address, intersection, mile marker, or other identifying information describing the location of the project is not adequate. For linear projects, the route of the project should be described as best as possible using the starting point for the address and latitude and longitude more clearly defined in the required map ) Facility Latitude/Longitude - List the latitude and longitude of the excavation(s) resulting in the discharge(s). If the exact soil disturbing location(s) are not known, list the latitude and longitude of the center point of the construction project. If using the center point, be sure to specify that it is the center point of construction activity. The preferred method is GPS and Decimal Degrees. . Longitude Decimal Degrees (to 5 decimal places) . Decimal Degrees (to 5 decimal places) (e.g., 39.70312°, 104.93348°) This information may be obtained from a variety of sources, including: Surveyors or engineers for the project should have, or be able to calculate, this information. U.S. Geological Survey topographical map(s), available at area map stores. Using a Global Positioning System (GPS) unit to obtain a direct reading. Google - Note: the latitude/longitude required above is not the directional degrees, minutes, and seconds provided on a site legal description to define property boundaries. C) MAP (Attachment) If no map is submitted, the application cannot be submitted. Map: Attach a map that indicates the site location and that CLEARLY shows the boundaries of the area that will be disturbed. A vicinity map is not adequate for this purpose. Legal description: If subdivided, provide the legal description below, or indicate that it is not applicable (do not supply Township/Range/Section or metes and bounds description of site) Subdivision(s): Lot(s): Block(s) OR Not applicable (site has not been subdivided) SW Construction Application for: page 3 of 5 City: County: Zip Code: D) LEGAL DESCRIPTION - only for Subdivisions Total area of project disturbance site (acres): E) AREA OF CONSTRUCTION SITE - SEE PAGE 1 - WILL DETERMINE FEE Note: aside from clearing, grading and excavation activities, disturbed areas also include areas receiving overburden (e.g., stockpiles), demolition areas, and areas with heavy equipment/vehicle traffic and storage that disturb existing vegetative cover. Part of Larger Common Plan of Development or Sale, (i.e., total, including all phases, filings, lots, and infrastructure not covered by this application) Provide both the total area of the construction site, and the area that will undergo disturbance, in acres. Commercial Development Non-structural and other development (i.e. parks, trails, stream realignment, bank stabilization, demolition, etc.) F) NATURE OF CONSTRUCTION ACTIVITY Check the appropriate box(es) or provide a brief description that indicates the general nature of the construction activities. (The full description of activities must be included in the Stormwater Management Plan.) Residential Development Highway and Transportation Development Pipeline and Utilities (including natural gas, electricity, water, and communications) Oil and Gas Exploration and Well Pad Development Í¬¿¬» Ñ² Ý¿³°« ó Ð¸¿» î ïéëï Íò Ý±´´»¹» ßª»²«» Ú±®¬ Ý±´´·² Ô¿®·³»® èðëîë ìð ëêìîî óïðë ðééëï ì ðòêð ì Ý±®» Ú±®¬ Ý±´´·² ïéëï Ý±´´»¹»ô ÔÔÝ SW Construction Application for: page 4 of 5 G) ANTICIPATED CONSTRUCTION SCHEDULE Construction Start Date: Final Stabilization Date: Construction Start Date - This is the day you expect to begin ground disturbing activities, including grubbing, stockpiling, excavating, demolition, and grading activities. Final Stabilization Date - in terms of permit coverage, this is when the site is finally stabilized. This means that all ground surface disturbing activities at the site have been completed, and all disturbed areas have been either built on, paved, or a uniform vegetative cover has been established with an individual plant density of at least 70 percent of pre-disturbance levels. Permit coverage must be maintained until the site is finally stabilized. Even if you are only doing one part of the project, the estimated final stabilization date must be for the overall project. If permit coverage is still required once your part is completed, the permit certification may be transferred or reassigned to a new responsible entity(s). H) RECEIVING WATERS (If discharge is to a ditch or storm sewer, include the name of the ultimate receiving waters) Immediate Receiving Water(s): Ultimate Receiving Water(s): Identify the receiving water of the stormwater from your site. Receiving waters are any waters of the State of Colorado. This includes all water courses, even if they are usually dry. If stormwater from the construction site enters a ditch or storm sewer system, identify that system and indicate the ultimate receiving water for the ditch or storm sewer. Note: a stormwater discharge permit does not allow a discharge into a ditch or storm sewer system without the approval of the owner/ operator of that system. ß°®·´ ïô îðïè Í»°¬»³¾»® ïô îðïè Í°®·²¹ Ý®»»µ Ý¿½¸» Ô¿ Ð±«¼®» Î·ª»® Ý±®» Ú±®¬ Ý±´´·² ïéëï Ý±´´»¹»ô ÔÔÝ I) SIGNATURE PAGE STORMWATER MANAGEMENT PLAN CERTIFICATION Ink Signature For Docusign Electronic Signature 1. You may print and sign this document and mail the hard copy to the State along with required documents (address on page one). 2. Electronic Submission Signature You may choose to submit your application electronically, along with required attachments. To do so, click the SUBMIT button below which will direct you, via e-mail , to sign the document electronically using the DocuSign Electronic Signature process. Once complete, you will receive via e-mail, an electronically stamped Adobe pdf of this application. Print the signature page from the electronically stamped pdf, sign it and mail it to the WQCD Permits Section to complete the application process (address is on page one of the application). The Division encourages use of the electronic submission of the application and electronic signature. This method meets signature requirements as required by the State of Colorado. The ink signed copy of the electronically stamped pdf signature page is also required to meet Federal EPA Requirements. Processing of the application will begin with the receipt of the valid electronic signature. By checking this box as been pre- pared for my activity. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the Stormwater Management Plan is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for Date: Signature of Legally Responsible Person or Authorized Agent (submission must include original signature) Name (printed) Title "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." scharges Associated with Construction Activity for the entirety of the construction site/project described and applied for, until such time as the application is amended or the certification is transferred, inactivated, or expired [Reg 61.4(1)(h)] DO NOT INCLUDE A COPY OF THE STORMWATER MANAGEMENT PLAN DO NOT INCLUDE PAYMENT AN INVOICE WILL BE SENT AFTER THE CERTIFICATION IS ISSUED. Signature: The applicant must be either the owner and operator of the construction site. Refer to Part B of the instructions for additional information. The application must be signed by the applicant to be considered complete. In all cases, it shall be signed as follows: (Regulation 61.4 (1ei) a) In the case of corporations, by the responsible corporate officer is responsible for the overall operation of the facility from which the discharge described in the form originates b) In the case of a partnership, by a general partner. c) In the case of a sole proprietorship, by the proprietor. d) In the case of a municipal, state, or other public facility, by either a principal executive officer, ranking elected official, (a principal executive officer has responsibility for the overall operation of the facility from which the discharge originates). SW Construction Application for: page 5 of 5 3rd Party Preparer: If this form was prepared by an authorized agent on behalf of the Permittee, please complete the field below. Preparer Name (printed) Email Address ì Ó¿®µ Ù±»¸¿«»² Í»²·±® Ü»ª»´±°³»²¬ Ó¿²¿¹»® Þ®§½» Ý¸®·¬»²»² ¾®§½»ò½¸®·¬»²»²àµ·³´»§ó¸±®²ò½±³ ÕæÄÝØÍÁÔÜÛÊÄïêèìëðððîÁÝÑÎÛÁÚ±®¬Ý±´´·²ÁÝÑÁøÝ±´´»¹»÷Äê Ð»®³·¬ ú ß°°ÄÍ¬¿¬» ±º Ý±´±®¿¼±Äß»®·¿´ Ó¿°ÄßÛÎ×ßÔ ÓßÐò°¼º Ý±®» Ú±®¬ Ý±´´·² ïéëï Ý±´´»¹»ô ÔÔÝ ß¬¬¿½¸ Ó¿° ß¬¬¿½¸ Ú·´» ß¬¬¿½¸ Ú·´» ß¬¬¿½¸ Ú·´» ß¬¬¿½¸ Ú·´» Exhibit C – USFWS Endangered Species Listing IPaC resource list Project information NAME CORE - Fort Collins_College Avenue LOCATION Larimer County, Colorado DESCRIPTION Choice Center Filing Local office Colorado Ecological Services Field Office  (303) 236-4773  (303) 236-4005 MAILING ADDRESS Denver Federal Center P.o. Box 25486 Denver, CO 80225-0486 IPaC U.S. Fish & Wildlife Service IPaC: Resources Page 1 of 11 https://ecos.fws.gov/ipac/project/TXNIR4OKHJFDJJBW3HK7GOO4DE/resources 1/30/2017 PHYSICAL ADDRESS 134 Union Boulevard, Suite 670 Lakewood, CO 80228-1807 http://www.fws.gov/coloradoES http://www.fws.gov/platteriver Endangered species This resource list is for informational purposes only and should not be used for planning or analyzing project level impacts. Section 7 of the Endangered Species Act requires Federal agencies to “request of the Secretary information whether any species which is listed or proposed to be listed may be present in the area of such proposed action” for any project that is conducted, permitted, funded, or licensed by any Federal agency. A letter from the local office and a species list which fulfills this requirement can only be obtained by requesting an official species list either from the Regulatory Review section in IPaC or from the local field office directly. For project evaluations that require USFWS concurrence/review, please return to the IPaC website and request an official species list by creating a project and making a request from the Regulatory Review section. Listed species are managed by the Endangered Species Program of the U.S. Fish and Wildlife Service. 1. Species listed under the Endangered Species Act are threatened or endangered; IPaC also shows species that are candidates, or proposed, for listing. See the listing status page for more information. The following species are potentially affected by activities in this location: 1 IPaC: Resources Page 2 of 11 https://ecos.fws.gov/ipac/project/TXNIR4OKHJFDJJBW3HK7GOO4DE/resources 1/30/2017 Birds Fishes NAME STATUS Least Tern Sterna antillarum No critical habitat has been designated for this species. http://ecos.fws.gov/ecp/species/8505 Endangered Mexican Spotted Owl Strix occidentalis lucida There is a final critical habitat designated for this species. Your location is outside the designated critical habitat. http://ecos.fws.gov/ecp/species/8196 Threatened Piping Plover Charadrius melodus There is a final critical habitat designated for this species. Your location is outside the designated critical habitat. http://ecos.fws.gov/ecp/species/6039 Threatened Whooping Crane Grus americana There is a final critical habitat designated for this species. Your location is outside the designated critical habitat. http://ecos.fws.gov/ecp/species/758 Endangered NAME STATUS Greenback Cutthroat Trout Oncorhynchus clarki stomias No critical habitat has been designated for this species. http://ecos.fws.gov/ecp/species/2775 Threatened Pallid Sturgeon Scaphirhynchus albus No critical habitat has been designated for this species. http://ecos.fws.gov/ecp/species/7162 Endangered IPaC: Resources Page 3 of 11 https://ecos.fws.gov/ipac/project/TXNIR4OKHJFDJJBW3HK7GOO4DE/resources 1/30/2017 Flowering Plants Insects Mammals NAME STATUS Colorado Butterfly Plant Gaura neomexicana var. coloradensis There is a final critical habitat designated for this species. Your location is outside the designated critical habitat. http://ecos.fws.gov/ecp/species/6110 Threatened North Park Phacelia Phacelia formosula No critical habitat has been designated for this species. http://ecos.fws.gov/ecp/species/123 Endangered Ute Ladies'-tresses Spiranthes diluvialis No critical habitat has been designated for this species. http://ecos.fws.gov/ecp/species/2159 Threatened Western Prairie Fringed Orchid Platanthera praeclara No critical habitat has been designated for this species. http://ecos.fws.gov/ecp/species/1669 Threatened NAME STATUS Arapahoe Snowfly Arsapnia arapahoe No critical habitat has been designated for this species. http://ecos.fws.gov/ecp/species/9141 Candidate NAME STATUS Canada Lynx Lynx canadensis There is a final critical habitat designated for this species. Your location is outside the designated critical habitat. http://ecos.fws.gov/ecp/species/3652 Threatened North American Wolverine Gulo gulo luscus No critical habitat has been designated for this species. http://ecos.fws.gov/ecp/species/5123 Proposed Threatened IPaC: Resources Page 4 of 11 https://ecos.fws.gov/ipac/project/TXNIR4OKHJFDJJBW3HK7GOO4DE/resources 1/30/2017 Critical habitats Potential effects to critical habitat(s) in this location must be analyzed along with the endangered species themselves. THERE ARE NO CRITICAL HABITATS AT THIS LOCATION. Migratory birds Preble's Meadow Jumping Mouse Zapus hudsonius preblei There is a final critical habitat designated for this species. Your location is outside the designated critical habitat. http://ecos.fws.gov/ecp/species/4090 Threatened Birds are protected under the Migratory Bird Treaty Act and the Bald and Golden Eagle Protection Act . Any activity that results in the take (to harass, harm, pursue, hunt, shoot, wound, kill, trap, capture, or collect, or to attempt to engage in any such conduct) of migratory birds or eagles is prohibited unless authorized by the U.S. Fish and Wildlife Service . There are no provisions for allowing the take of migratory birds that are unintentionally killed or injured. Any person or organization who plans or conducts activities that may result in the take of migratory birds is responsible for complying with the appropriate regulations and implementing appropriate conservation measures. 1. The Migratory Birds Treaty Act of 1918. 2. The Bald and Golden Eagle Protection Act of 1940. 3. 50 C.F.R. Sec. 10.12 and 16 U.S.C. Sec. 668(a) Additional information can be found using the following links: • Birds of Conservation Concern http://www.fws.gov/birds/management/managed- species/ birds-of-conservation-concern.php 1 2 3 IPaC: Resources Page 5 of 11 https://ecos.fws.gov/ipac/project/TXNIR4OKHJFDJJBW3HK7GOO4DE/resources 1/30/2017 The migratory birds species listed below are species of particular conservation concern (e.g. Birds of Conservation Concern) that may be potentially affected by activities in this location, not a list of every bird species you may find in this location. Although it is important to try to avoid and minimize impacts to all birds, special attention should be made to avoid and minimize impacts to birds of priority concern. To view available data on other bird species that may occur in your project area, please visit the AKN Histogram Tools and Other Bird Data Resources. • Conservation measures for birds http://www.fws.gov/birds/management/project- assessment-tools-and-guidance/ conservation-measures.php • Year-round bird occurrence data http://www.birdscanada.org/birdmon/default/datasummaries.jsp NAME SEASON(S) American Bittern Botaurus lentiginosus http://ecos.fws.gov/ecp/species/6582 Breeding Bald Eagle Haliaeetus leucocephalus http://ecos.fws.gov/ecp/species/1626 Year-round Black Rosy-finch Leucosticte atrata http://ecos.fws.gov/ecp/species/9460 Year-round Black Swift Cypseloides niger http://ecos.fws.gov/ecp/species/8878 Breeding Brewer's Sparrow Spizella breweri http://ecos.fws.gov/ecp/species/9291 Breeding Burrowing Owl Athene cunicularia http://ecos.fws.gov/ecp/species/9737 Breeding Cassin's Finch Carpodacus cassinii http://ecos.fws.gov/ecp/species/9462 Year-round Dickcissel Spiza americana Breeding IPaC: Resources Page 6 of 11 https://ecos.fws.gov/ipac/project/TXNIR4OKHJFDJJBW3HK7GOO4DE/resources 1/30/2017 Ferruginous Hawk Buteo regalis http://ecos.fws.gov/ecp/species/6038 Year-round Flammulated Owl Otus flammeolus http://ecos.fws.gov/ecp/species/7728 Breeding Golden Eagle Aquila chrysaetos http://ecos.fws.gov/ecp/species/1680 Year-round Lark Bunting Calamospiza melanocorys Breeding Lewis's Woodpecker Melanerpes lewis http://ecos.fws.gov/ecp/species/9408 Breeding Loggerhead Shrike Lanius ludovicianus http://ecos.fws.gov/ecp/species/8833 Breeding Long-billed Curlew Numenius americanus http://ecos.fws.gov/ecp/species/5511 Breeding Mccown's Longspur Calcarius mccownii http://ecos.fws.gov/ecp/species/9292 Breeding Mountain Plover Charadrius montanus http://ecos.fws.gov/ecp/species/3638 Breeding Peregrine Falcon Falco peregrinus http://ecos.fws.gov/ecp/species/8831 Breeding Prairie Falcon Falco mexicanus http://ecos.fws.gov/ecp/species/4736 Year-round Red-headed Woodpecker Melanerpes erythrocephalus Breeding Sage Thrasher Oreoscoptes montanus http://ecos.fws.gov/ecp/species/9433 Breeding IPaC: Resources Page 7 of 11 https://ecos.fws.gov/ipac/project/TXNIR4OKHJFDJJBW3HK7GOO4DE/resources 1/30/2017 What does IPaC use to generate the list of migratory bird species potentially occurring in my specified location? Landbirds: Migratory birds that are displayed on the IPaC species list are based on ranges in the latest edition of the National Geographic Guide, Birds of North America (6th Edition, 2011 by Jon L. Dunn, and Jonathan Alderfer). Although these ranges are coarse in nature, a number of U.S. Fish and Wildlife Service migratory bird biologists agree that these maps are some of the best range maps to date. These ranges were clipped to a specific Bird Conservation Region (BCR) or USFWS Region/Regions, if it was indicated in the 2008 list of Birds of Conservation Concern (BCC) that a species was a BCC species only in a particular Region/Regions. Additional modifications have been made to some ranges based on more local or refined range information and/or information provided by U.S. Fish and Wildlife Service biologists with species expertise. All migratory birds that show in areas on land in IPaC are those that appear in the 2008 Birds of Conservation Concern report. Atlantic Seabirds: Ranges in IPaC for birds off the Atlantic coast are derived from species distribution models developed by the National Oceanic and Atmospheric Association (NOAA) National Centers for Coastal Ocean Science (NCCOS) using the best available seabird survey data for the offshore Atlantic Coastal region to date. NOAANCCOS assisted USFWS in developing seasonal species ranges from their models for specific use in IPaC. Some of these birds are not BCC species but were of interest for inclusion because they may occur in high abundance off the coast at different times throughout the year, which potentially makes them more susceptible to certain types of Short-eared Owl Asio flammeus http://ecos.fws.gov/ecp/species/9295 Wintering Swainson's Hawk Buteo swainsoni http://ecos.fws.gov/ecp/species/1098 Breeding Virginia's Warbler Vermivora virginiae http://ecos.fws.gov/ecp/species/9441 Breeding Western Grebe aechmophorus occidentalis http://ecos.fws.gov/ecp/species/6743 Breeding Williamson's Sapsucker Sphyrapicus thyroideus http://ecos.fws.gov/ecp/species/8832 Breeding Willow Flycatcher Empidonax traillii http://ecos.fws.gov/ecp/species/3482 Breeding IPaC: Resources Page 8 of 11 https://ecos.fws.gov/ipac/project/TXNIR4OKHJFDJJBW3HK7GOO4DE/resources 1/30/2017 development and activities taking place in that area. For more refined details about the abundance and richness of bird species within your project area off the Atlantic Coast, see the Northeast Ocean Data Portal. The Portal also offers data and information about other types of taxa that may be helpful in your project review. About the NOAANCCOS models: the models were developed as part of the NOAANCCOS project: Integrative Statistical Modeling and Predictive Mapping of Marine Bird Distributions and Abundance on the Atlantic Outer Continental Shelf. The models resulting from this project are being used in a number of decision-support/mapping products in order to help guide decision- making on activities off the Atlantic Coast with the goal of reducing impacts to migratory birds. One such product is the Northeast Ocean Data Portal, which can be used to explore details about the relative occurrence and abundance of bird species in a particular area off the Atlantic Coast. All migratory bird range maps within IPaC are continuously being updated as new and better information becomes available. Can I get additional information about the levels of occurrence in my project area of specific birds or groups of birds listed in IPaC? Landbirds: The Avian Knowledge Network (AKN) provides a tool currently called the "Histogram Tool", which draws from the data within the AKN (latest,survey, point count, citizen science datasets) to create a view of relative abundance of species within a particular location over the course of the year. The results of the tool depict the frequency of detection of a species in survey events, averaged between multiple datasets within AKN in a particular week of the year. You may access the histogram tools through the Migratory Bird Programs AKN Histogram Tools webpage. The tool is currently available for 4 regions (California, Northeast U.S., Southeast U.S. and Midwest), which encompasses the following 32 states: Alabama, Arkansas, California, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, New Hampshire, New Jersey, New York, North, Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont, Virginia, West Virginia, and Wisconsin. In the near future, there are plans to expand this tool nationwide within the AKN, and allow the graphs produced to appear with the list of trust resources generated by IPaC, providing you with an additional level of detail about the level of occurrence of the species of particular concern potentially occurring in your project area throughout the course of the year. Atlantic Seabirds: For additional details about the relative occurrence and abundance of both individual bird species and groups of bird species within your project area off the Atlantic Coast, please visit the Northeast Ocean Data Portal. The Portal also offers data and information about other taxa besides birds that may be helpful to you in your project review. Alternately, you may download the bird model results IPaC: Resources Page 9 of 11 https://ecos.fws.gov/ipac/project/TXNIR4OKHJFDJJBW3HK7GOO4DE/resources 1/30/2017 files underlying the portal maps through the NOAANCCOS Integrative Statistical Modeling and Predictive Mapping of Marine Bird Distributions and Abundance on the Atlantic Outer Continental Shelf project webpage. Facilities Wildlife refuges and fish hatcheries REFUGE AND FISH HATCHERY INFORMATION IS NOT AVAILABLE AT THIS TIME Wetlands in the National Wetlands Inventory Impacts to NWI wetlands and other aquatic habitats may be subject to regulation under Section 404 of the Clean Water Act, or other State/Federal statutes. For more information please contact the Regulatory Program of the local U.S. Army Corps of Engineers District. WETLAND INFORMATION IS NOT AVAILABLE AT THIS TIME Data limitations The Service's objective of mapping wetlands and deepwater habitats is to produce reconnaissance level information on the location, type and size of these resources. The maps are prepared from the analysis of high altitude imagery. Wetlands are identified based on vegetation, visible hydrology and geography. A margin of error is inherent in the use of imagery; thus, detailed on- the-ground inspection of any particular site may result in revision of the wetland boundaries or classification established through image analysis. The accuracy of image interpretation depends on the quality of the imagery, the experience of the image analysts, the amount and quality of the collateral data and the amount of ground truth verification work conducted. Metadata should be consulted to determine the date of the source imagery used and any mapping problems. IPaC: Resources Page 10 of 11 https://ecos.fws.gov/ipac/project/TXNIR4OKHJFDJJBW3HK7GOO4DE/resources 1/30/2017 Wetlands or other mapped features may have changed since the date of the imagery or field work. There may be occasional differences in polygon boundaries or classifications between the information depicted on the map and the actual conditions on site. Data exclusions Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and nearshore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial imagery. Data precautions Federal, state, and local regulatory agencies with jurisdiction over wetlands may define and describe wetlands in a different manner than that used in this inventory. There is no attempt, in either the design or products of this inventory, to define the limits of proprietary jurisdiction of any Federal, state, or local government or to establish the geographical scope of the regulatory programs of government agencies. Persons intending to engage in activities involving modifications within or adjacent to wetland areas should seek the advice of appropriate federal, state, or local agencies concerning specified agency regulatory programs and proprietary jurisdictions that may affect such activities. IPaC: Resources Page 11 of 11 https://ecos.fws.gov/ipac/project/TXNIR4OKHJFDJJBW3HK7GOO4DE/resources 1/30/2017 Exhibit D – Soils Information Hydrologic Soil Group—Larimer County Area, Colorado Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 12/6/2016 Page 1 of 4 4490330 4490340 4490350 4490360 4490370 4490380 4490390 4490400 4490410 4490420 4490430 4490440 4490330 4490340 4490350 4490360 4490370 4490380 4490390 4490400 4490410 4490420 4490430 4490440 493400 493410 493420 493430 493440 493450 493460 493470 493480 493400 493410 493420 493430 493440 493450 493460 493470 493480 40° 33' 53'' N 105° 4' 40'' W 40° 33' 53'' N 105° 4' 37'' W 40° 33' 49'' N 105° 4' 40'' W 40° 33' 49'' N 105° 4' 37'' W N Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84 0 25 50 100 150 Feet 0 5 10 20 30 Meters Map Scale: 1:563 if printed on A portrait (8.5" x 11") sheet. Warning: Soil Map may not be valid at this scale. MAP LEGEND MAP INFORMATION Area of Interest (AOI) Area of Interest (AOI) Soils Soil Rating Polygons A A/D B B/D C C/D D Not rated or not available Soil Rating Lines A A/D B B/D C C/D D Not rated or not available Soil Rating Points A A/D B B/D C C/D D Not rated or not available 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: http://websoilsurvey.nrcs.usda.gov 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 Hydrologic Soil Group Hydrologic Soil Group— Summary by Map Unit — Larimer County Area, Colorado (CO644) Map unit symbol Map unit name Rating Acres in AOI Percent of AOI 4 Altvan-Satanta loams, 3 to 9 percent slopes B 0.4 24.5% 35 Fort Collins loam, 0 to 3 percent slopes C 1.2 75.5% Totals for Area of Interest 1.6 100.0% Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition Hydrologic Soil Group—Larimer County Area, Colorado Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 12/6/2016 Page 3 of 4 Component Percent Cutoff: None Specified Tie-break Rule: Higher Hydrologic Soil Group—Larimer County Area, Colorado Natural Resources Conservation Service Web Soil Survey National Cooperative Soil Survey 12/6/2016 Page 4 of 4 Exhibit E – Identification of Pollutant Sources Choice Center Filing 3 – Fort Collins, CO February 2017 OUTDOOR STORAGE OF MATERIALS LOG IDENTIFICATION OF POLLUTANT DATE ONSITE DATE REMOVED CONTAINMENT METHOD Choice Center Filing 3 – Fort Collins, CO February 2017 VEHICLE EQUIPMENT MAINTENANCE & FUELING LOG IDENTIFICATION OF POLLUTANT DATE ONSITE DATE REMOVED CONTAINMENT METHOD Choice Center Filing 3 – Fort Collins, CO February 2017 ROUTINE MAINTENANCE LOG IDENTIFICATION OF POLLUTANT DATE ONSITE DATE REMOVED CONTAINMENT METHOD Choice Center Filing 3 – Fort Collins, CO February 2017 ONSITE WASTE MANAGEMENT LOG IDENTIFICATION OF POLLUTANT DATE ONSITE DATE REMOVED CONTAINMENT METHOD Choice Center Filing 3 – Fort Collins, CO February 2017 NON-INDUSTRIAL WASTE SOURCES LOG IDENTIFICATION OF POLLUTANT DATE ONSITE DATE REMOVED CONTAINMENT METHOD Choice Center Filing 3 – Fort Collins, CO February 2017 ADDITIONAL POLLUTANT SOURCES LOG IDENTIFICATION OF POLLUTANT DATE ONSITE DATE REMOVED CONTAINMENT METHOD Exhibit F – BMP Details Concrete Washout Area (CWA) MM-1 November 2010 Urban Drainage and Flood Control District CWA-1 Urban Storm Drainage Criteria Manual Volume 3 Photograph CWA-1. Example of concrete washout area. Note gravel tracking pad for access and sign. Description Concrete waste management involves designating and properly managing a specific area of the construction site as a concrete washout area. A concrete washout area can be created using one of several approaches designed to receive wash water from washing of tools and concrete mixer chutes, liquid concrete waste from dump trucks, mobile batch mixers, or pump trucks. Three basic approaches are available: excavation of a pit in the ground, use of an above ground storage area, or use of prefabricated haul- away concrete washout containers. Surface discharges of concrete washout water from construction sites are prohibited. Appropriate Uses Concrete washout areas must be designated on all sites that will generate concrete wash water or liquid concrete waste from onsite concrete mixing or concrete delivery. Because pH is a pollutant of concern for washout activities, when unlined pits are used for concrete washout, the soil must have adequate buffering capacity to result in protection of state groundwater standards; otherwise, a liner/containment must be used. The following management practices are recommended to prevent an impact from unlined pits to groundwater:  The use of the washout site should be temporary (less than 1 year), and  The washout site should be not be located in an area where shallow groundwater may be present, such as near natural drainages, springs, or wetlands. Design and Installation Concrete washout activities must be conducted in a manner that does not contribute pollutants to surface waters or stormwater runoff. Concrete washout areas may be lined or unlined excavated pits in the ground, commercially manufactured prefabricated washout containers, or aboveground holding areas constructed of berms, sandbags or straw bales with a plastic liner. Although unlined washout areas may be used, lined pits may be required to protect groundwater under certain conditions. Do not locate an unlined washout area within 400 feet of any natural drainage pathway or waterbody or within 1,000 feet of any wells or drinking water sources. Even for lined concrete washouts, it is advisable to locate the facility away from waterbodies and drainage paths. If site constraints make these Concrete Washout Area Functions Erosion Control No Sediment Control No Site/Material Management Yes MM-1 Concrete Washout Area (CWA) CWA-2 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 setbacks infeasible or if highly permeable soils exist in the area, then the pit must be installed with an impermeable liner (16 mil minimum thickness) or surface storage alternatives using prefabricated concrete washout devices or a lined aboveground storage area should be used. Design details with notes are provided in Detail CWA-1 for pits and CWA-2 for aboveground storage areas. Pre-fabricated concrete washout container information can be obtained from vendors. Maintenance and Removal A key consideration for concrete washout areas is to ensure that adequate signage is in place identifying the location of the washout area. Part of inspecting and maintaining washout areas is ensuring that adequate signage is provided and in good repair and that the washout area is being used, as opposed to washout in non-designated areas of the site. Remove concrete waste in the washout area, as needed to maintain BMP function (typically when filled to about two-thirds of its capacity). Collect concrete waste and deliver offsite to a designated disposal location. Upon termination of use of the washout site, accumulated solid waste, including concrete waste and any contaminated soils, must be removed from the site to prevent on-site disposal of solid waste. If the wash water is allowed to evaporate and the concrete hardens, it may be recycled. Photograph CWA-3. Earthen concrete washout. Photo courtesy of CDOT. Photograph CWA-2. Prefabricated concrete washout. Photo courtesy of CDOT. 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 Silt Fence (SF) SC-1 November 2010 Urban Drainage and Flood Control District SF-1 Urban Storm Drainage Criteria Manual Volume 3 Photograph SF-1. Silt fence creates a sediment barrier, forcing sheet flow runoff to evaporate or infiltrate. Description A silt fence is a woven geotextile fabric attached to wooden posts and trenched into the ground. It is designed as a sediment barrier to intercept sheet flow runoff from disturbed areas. Appropriate Uses A silt fence can be used where runoff is conveyed from a disturbed area as sheet flow. Silt fence is not designed to receive concentrated flow or to be used as a filter fabric. Typical uses include:  Down slope of a disturbed area to accept sheet flow.  Along the perimeter of a receiving water such as a stream, pond or wetland.  At the perimeter of a construction site. Design and Installation Silt fence should be installed along the contour of slopes so that it intercepts sheet flow. The maximum recommended tributary drainage area per 100 lineal feet of silt fence, installed along the contour, is approximately 0.25 acres with a disturbed slope length of up to 150 feet and a tributary slope gradient no steeper than 3:1. Longer and steeper slopes require additional measures. This recommendation only applies to silt fence installed along the contour. Silt fence installed for other uses, such as perimeter control, should be installed in a way that will not produce concentrated flows. For example, a "J-hook" installation may be appropriate to force runoff to pond and evaporate or infiltrate in multiple areas rather than concentrate and cause erosive conditions parallel to the silt fence. See Detail SF-1 for proper silt fence installation, which involves proper trenching, staking, securing the fabric to the stakes, and backfilling the silt fence. Properly installed silt fence should not be easily pulled out by hand and there should be no gaps between the ground and the fabric. Silt fence must meet the minimum allowable strength requirements, depth of installation requirement, and other specifications in the design details. Improper installation of silt fence is a common reason for silt fence failure; however, when properly installed and used for the appropriate purposes, it can be highly effective. Silt Fence Functions Erosion Control No Sediment Control Yes Site/Material Management No SC-1 Silt Fence (SF) SF-2 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 Photograph SF-2. When silt fence is not installed along the contour, a "J-hook" installation may be appropriate to ensure that the BMP does not create concentrated flow parallel to the silt fence. Photo courtesy of Tom Gore. Maintenance and Removal Inspection of silt fence includes observing the material for tears or holes and checking for slumping fence and undercut areas bypassing flows. Repair of silt fence typically involves replacing the damaged section with a new section. Sediment accumulated behind silt fence should be removed, as needed to maintain BMP effectiveness, typically before it reaches a depth of 6 inches. Silt fence may be removed when the upstream area has reached final stabilization. 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 Inlet Protection (IP) SC-6 August 2013 Urban Drainage and Flood Control District IP-1 Urban Storm Drainage Criteria Manual Volume 3 Photograph IP-1. Inlet protection for a curb opening inlet. Description Inlet protection consists of permeable barriers installed around an inlet to filter runoff and remove sediment prior to entering a storm drain inlet. Inlet protection can be constructed from rock socks, sediment control logs, silt fence, block and rock socks, or other materials approved by the local jurisdiction. Area inlets can also be protected by over-excavating around the inlet to form a sediment trap. Appropriate Uses Install protection at storm sewer inlets that are operable during construction. Consider the potential for tracked-out sediment or temporary stockpile areas to contribute sediment to inlets when determining which inlets must be protected. This may include inlets in the general proximity of the construction area, not limited to downgradient inlets. Inlet protection is not a stand-alone BMP and should be used in conjunction with other upgradient BMPs. Design and Installation To function effectively, inlet protection measures must be installed to ensure that flows do not bypass the inlet protection and enter the storm drain without treatment. However, designs must also enable the inlet to function without completely blocking flows into the inlet in a manner that causes localized flooding. When selecting the type of inlet protection, consider factors such as type of inlet (e.g., curb or area, sump or on-grade conditions), traffic, anticipated flows, ability to secure the BMP properly, safety and other site-specific conditions. For example, block and rock socks will be better suited to a curb and gutter along a roadway, as opposed to silt fence or sediment control logs, which cannot be properly secured in a curb and gutter setting, but are effective area inlet protection measures. Several inlet protection designs are provided in the Design Details. Additionally, a variety of proprietary products are available for inlet protection that may be approved for use by local governments. If proprietary products are used, design details and installation procedures from the manufacturer must be followed. Regardless of the type of inlet protection selected, inlet protection is most effective when combined with other BMPs such as curb socks and check dams. Inlet protection is often the last barrier before runoff enters the storm sewer or receiving water. Design details with notes are provided for these forms of inlet protection: IP-1. Block and Rock Sock Inlet Protection for Sump or On-grade Inlets IP-2. Curb (Rock) Socks Upstream of Inlet Protection, On-grade Inlets Inlet Protection (various forms) Functions Erosion Control No Sediment Control Yes Site/Material Management No SC-6 Inlet Protection (IP) IP-2 Urban Drainage and Flood Control District August 2013 Urban Storm Drainage Criteria Manual Volume 3 IP-3. Rock Sock Inlet Protection for Sump/Area Inlet IP-4. Silt Fence Inlet Protection for Sump/Area Inlet IP-5. Over-excavation Inlet Protection IP-6. Straw Bale Inlet Protection for Sump/Area Inlet CIP-1. Culvert Inlet Protection Propriety inlet protection devices should be installed in accordance with manufacturer specifications. More information is provided below on selecting inlet protection for sump and on-grade locations. Inlets Located in a Sump When applying inlet protection in sump conditions, it is important that the inlet continue to function during larger runoff events. For curb inlets, the maximum height of the protective barrier should be lower than the top of the curb opening to allow overflow into the inlet during larger storms without excessive localized flooding. If the inlet protection height is greater than the curb elevation, particularly if the filter becomes clogged with sediment, runoff will not enter the inlet and may bypass it, possibly causing localized flooding, public safety issues, and downstream erosion and damage from bypassed flows. Area inlets located in a sump setting can be protected through the use of silt fence, concrete block and rock socks (on paved surfaces), sediment control logs/straw wattles embedded in the adjacent soil and stacked around the area inlet (on pervious surfaces), over-excavation around the inlet, and proprietary products providing equivalent functions. Inlets Located on a Slope For curb and gutter inlets on paved sloping streets, block and rock sock inlet protection is recommended in conjunction with curb socks in the gutter leading to the inlet. For inlets located along unpaved roads, also see the Check Dam Fact Sheet. Maintenance and Removal Inspect inlet protection frequently. Inspection and maintenance guidance includes:  Inspect for tears that can result in sediment directly entering the inlet, as well as result in the contents of the BMP (e.g., gravel) washing into the inlet.  Check for improper installation resulting in untreated flows bypassing the BMP and directly entering the inlet or bypassing to an unprotected downstream inlet. For example, silt fence that has not been properly trenched around the inlet can result in flows under the silt fence and directly into the inlet.  Look for displaced BMPs that are no longer protecting the inlet. Displacement may occur following larger storm events that wash away or reposition the inlet protection. Traffic or equipment may also crush or displace the BMP.  Monitor sediment accumulation upgradient of the inlet protection. Inlet Protection (IP) SC-6 August 2013 Urban Drainage and Flood Control District IP-3 Urban Storm Drainage Criteria Manual Volume 3  Remove sediment accumulation from the area upstream of the inlet protection, as needed to maintain BMP effectiveness, typically when it reaches no more than half the storage capacity of the inlet protection. For silt fence, remove sediment when it accumulates to a depth of no more than 6 inches. Remove sediment accumulation from the area upstream of the inlet protection as needed to maintain the functionality of the BMP.  Propriety inlet protection devices should be inspected and maintained in accordance with manufacturer specifications. If proprietary inlet insert devices are used, sediment should be removed in a timely manner to prevent devices from breaking and spilling sediment into the storm drain. Inlet protection must be removed and properly disposed of when the drainage area for the inlet has reached final stabilization. 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 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. Protection of Existing Vegetation (PV) SM-2 November 2010 Urban Drainage and Flood Control District PV-1 Urban Storm Drainage Criteria Manual Volume 3 Photograph PV-1. Protection of existing vegetation and a sensitive area. Photo courtesy of CDOT. Description Protection of existing vegetation on a construction site can be accomplished through installation of a construction fence around the area requiring protection. In cases where upgradient areas are disturbed, it may also be necessary to install perimeter controls to minimize sediment loading to sensitive areas such as wetlands. Existing vegetation may be designated for protection to maintain a stable surface cover as part of construction phasing, or vegetation may be protected in areas designated to remain in natural condition under post-development conditions (e.g., wetlands, mature trees, riparian areas, open space). Appropriate Uses Existing vegetation should be preserved for the maximum practical duration on a construction site through the use of effective construction phasing. Preserving vegetation helps to minimize erosion and can reduce revegetation costs following construction. Protection of wetland areas is required under the Clean Water Act, unless a permit has been obtained from the U.S. Army Corps of Engineers (USACE) allowing impacts in limited areas. If trees are to be protected as part of post-development landscaping, care must be taken to avoid several types of damage, some of which may not be apparent at the time of injury. Potential sources of injury include soil compaction during grading or due to construction traffic, direct equipment-related injury such as bark removal, branch breakage, surface grading and trenching, and soil cut and fill. In order to minimize injuries that may lead to immediate or later death of the tree, tree protection zones should be developed during site design, implemented at the beginning of a construction project, as well as continued during active construction. Design and Installation General Once an area has been designated as a preservation area, there should be no construction activity allowed within a set distance of the area. Clearly mark the area with construction fencing. Do not allow stockpiles, equipment, trailers or parking within the protected area. Guidelines to protect various types of existing vegetation follow. Protection of Existing Vegetation Functions Erosion Control Yes Sediment Control Moderate Site/Material Management Yes SM-2 Protection of Existing Vegetation (PV) PV-2 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 Surface Cover During Phased Construction Install construction fencing or other perimeter controls around areas to be protected from clearing and grading as part of construction phasing. Maintaining surface cover on steep slopes for the maximum practical duration during construction is recommended. Open Space Preservation Where natural open space areas will be preserved as part of a development, it is important to install construction fencing around these areas to protect them from compaction. This is particularly important when areas with soils with high infiltration rates are preserved as part of LID designs. Preserved open space areas should not be used for staging and equipment storage. Wetlands and Riparian Areas Install a construction fence around the perimeter of the wetland or riparian (streamside vegetation) area to prevent access by equipment. In areas downgradient of disturbed areas, install a perimeter control such as silt fence, sediment control logs, or similar measure to minimize sediment loading to the wetland. Tree Protection 1  Before beginning construction operations, establish a tree protection zone around trees to be preserved by installing construction fences. Allow enough space from the trunk to protect the root zone from soil compaction and mechanical damage, and the branches from mechanical damage (see Table PV-1). If low branches will be kept, place the fence outside of the drip line. Where this is not possible, place fencing as far away from the trunk as possible. In order to maintain a healthy tree, be aware that about 60 percent of the tree's root zone extends beyond the drip line. Table PV-1 Guidelines for Determining the Tree Protection Zone (Source: Matheny and Clark, 1998; as cited in GreenCO and WWE 2008) Distance from Trunk (ft) per inch of DBH Species Tolerance to Damage Young Mature Over mature Good 0.5' 0.75' 1.0' Moderate 0.75' 1.0' 1.25' Poor 1.0' 1.25' 1.5' Notes: DBH = diameter at breast height (4.5 ft above grade); Young = <20% of life expectancy; Mature = 20%-80% of life expectancy; Over mature =>80% of life expectancy  Most tree roots grow within the top 12 to 18 inches of soil. Grade changes within the tree protection zone should be avoided where possible because seemingly minor grade changes can either smother 1 Tree Protection guidelines adapted from GreenCO and WWE (2008). Green Industry Best Management Practices (BMPs) for the Conservation and Protection of Water Resources in Colorado: Moving Toward Sustainability, Third Release. See www.greenco.org for more detailed guidance on tree preservation. Protection of Existing Vegetation (PV) SM-2 November 2010 Urban Drainage and Flood Control District PV-3 Urban Storm Drainage Criteria Manual Volume 3 roots (in fill situations) or damage roots (in cut situations). Consider small walls where needed to avoid grade changes in the tree protection zone.  Place and maintain a layer of mulch 4 to 6-inch thick from the tree trunk to the fencing, keeping a 6-inch space between the mulch and the trunk. Mulch helps to preserve moisture and decrease soil compaction if construction traffic is unavoidable. When planting operations are completed, the mulch may be reused throughout planting areas.  Limit access, if needed at all, and appoint one route as the main entrance and exit to the tree protection zone. Within the tree protection zone, do not allow any equipment to be stored, chemicals to be dumped, or construction activities to take place except fine grading, irrigation system installation, and planting operations. These activities should be conducted in consultation with a landscaping professional, following Green Industry BMPs.  Be aware that soil compaction can cause extreme damage to tree health that may appear gradually over a period of years. Soil compaction is easier to prevent than repair. Maintenance and Removal Repair or replace damaged or displaced fencing or other protective barriers around the vegetated area. If damage occurs to a tree, consult an arborist for guidance on how to care for the tree. If a tree in a designated preservation area is damaged beyond repair, remove and replace with a 2-inch diameter tree of the same or similar species. Construction equipment must not enter a wetland area, except as permitted by the U.S. Army Corps of Engineers (USACE). Inadvertent placement of fill in a wetland is a 404 permit violation and will require notification of the USACE. If damage to vegetation occurs in a protected area, reseed the area with the same or similar species, following the recommendations in the USDCM Revegetation chapter. Construction Fence (CF) SM-3 November 2010 Urban Drainage and Flood Control District CF-1 Urban Storm Drainage Criteria Manual Volume 3 Photograph CF-1. A construction fence helps delineate areas where existing vegetation is being protected. Photo courtesy of Douglas County. Description A construction fence restricts site access to designated entrances and exits, delineates construction site boundaries, and keeps construction out of sensitive areas such as natural areas to be preserved as open space, wetlands and riparian areas. Appropriate Uses A construction fence can be used to delineate the site perimeter and locations within the site where access is restricted to protect natural resources such as wetlands, waterbodies, trees, and other natural areas of the site that should not be disturbed. If natural resource protection is an objective, then the construction fencing should be used in combination with other perimeter control BMPs such as silt fence, sediment control logs or similar measures. Design and Installation Construction fencing may be chain link or plastic mesh and should be installed following manufacturer’s recommendations. See Detail CF-1 for typical installations. Do not place construction fencing in areas within work limits of machinery. Maintenance and Removal  Inspect fences for damage; repair or replace as necessary.  Fencing should be tight and any areas with slumping or fallen posts should be reinstalled.  Fencing should be removed once construction is complete. Construction Fence Functions Erosion Control No Sediment Control No Site/Material Management Yes SM-3 Construction Fence (CF) CF-2 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 Construction Fence (CF) SM-3 November 2010 Urban Drainage and Flood Control District CF-3 Urban Storm Drainage Criteria Manual Volume 3 Vehicle Tracking Control (VTC) SM-4 November 2010 Urban Drainage and Flood Control District VTC-1 Urban Storm Drainage Criteria Manual Volume 3 Photograph VTC-1. A vehicle tracking control pad constructed with properly sized rock reduces off-site sediment tracking. Description Vehicle tracking controls provide stabilized construction site access where vehicles exit the site onto paved public roads. An effective vehicle tracking control helps remove sediment (mud or dirt) from vehicles, reducing tracking onto the paved surface. Appropriate Uses Implement a stabilized construction entrance or vehicle tracking control where frequent heavy vehicle traffic exits the construction site onto a paved roadway. An effective vehicle tracking control is particularly important during the following conditions:  Wet weather periods when mud is easily tracked off site.  During dry weather periods where dust is a concern.  When poorly drained, clayey soils are present on site. Although wheel washes are not required in designs of vehicle tracking controls, they may be needed at particularly muddy sites. Design and Installation Construct the vehicle tracking control on a level surface. Where feasible, grade the tracking control towards the construction site to reduce off-site runoff. Place signage, as needed, to direct construction vehicles to the designated exit through the vehicle tracking control. There are several different types of stabilized construction entrances including: VTC-1. Aggregate Vehicle Tracking Control. This is a coarse-aggregate surfaced pad underlain by a geotextile. This is the most common vehicle tracking control, and when properly maintained can be effective at removing sediment from vehicle tires. VTC-2. Vehicle Tracking Control with Construction Mat or Turf Reinforcement Mat. This type of control may be appropriate for site access at very small construction sites with low traffic volume over vegetated areas. Although this application does not typically remove sediment from vehicles, it helps protect existing vegetation and provides a stabilized entrance. Vehicle Tracking Control Functions Erosion Control Moderate Sediment Control Yes Site/Material Management Yes SM-4 Vehicle Tracking Control (VTC) VTC-2 Urban Drainage and Flood Control District November 2010 Urban Storm Drainage Criteria Manual Volume 3 Photograph VTC-2. A vehicle tracking control pad with wheel wash facility. Photo courtesy of Tom Gore. VTC-3. Stabilized Construction Entrance/Exit with Wheel Wash. This is an aggregate pad, similar to VTC-1, but includes equipment for tire washing. The wheel wash equipment may be as simple as hand-held power washing equipment to more advance proprietary systems. When a wheel wash is provided, it is important to direct wash water to a sediment trap prior to discharge from the site. Vehicle tracking controls are sometimes installed in combination with a sediment trap to treat runoff. Maintenance and Removal Inspect the area for degradation and replace aggregate or material used for a stabilized entrance/exit as needed. If the area becomes clogged and ponds water, remove and dispose of excess sediment or replace material with a fresh layer of aggregate as necessary. With aggregate vehicle tracking controls, ensure rock and debris from this area do not enter the public right-of-way. Remove sediment that is tracked onto the public right of way daily or more frequently as needed. Excess sediment in the roadway indicates that the stabilized construction entrance needs maintenance. Ensure that drainage ditches at the entrance/exit area remain clear. A stabilized entrance should be removed only when there is no longer the potential for vehicle tracking to occur. This is typically after the site has been stabilized. When wheel wash equipment is used, be sure that the wash water is discharged to a sediment trap prior to discharge. Also inspect channels conveying the water from the wash area to the sediment trap and stabilize areas that may be eroding. When a construction entrance/exit is removed, excess sediment from the aggregate should be removed and disposed of appropriately. The entrance should be promptly stabilized with a permanent surface following removal, typically by paving. 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 Paving and Grinding Operations (PGO) SM-12 November 2010 Urban Drainage and Flood Control District PGO-1 Urban Storm Drainage Criteria Manual Volume 3 Photograph PGO-1. Paving operations on a Colorado highway. Photo courtesy of CDOT. Description Manage runoff from paving and grinding operations to reduce pollutants entering storm drainage systems and natural drainageways. Appropriate Uses Use runoff management practices during all paving and grinding operations such as surfacing, resurfacing, and saw cutting. Design and Installation There are a variety of management strategies that can be used to manage runoff from paving and grinding operations:  Establish inlet protection for all inlets that could potentially receive runoff.  Schedule paving operations when dry weather is forecasted.  Keep spill kits onsite for equipment spills and keep drip pans onsite for stored equipment.  Install perimeter controls when asphalt material is used on embankments or shoulders near waterways, drainages, or inlets.  Do not wash any paved surface into receiving storm drain inlets or natural drainageways. Instead, loose material should be swept or vacuumed following paving and grinding operations.  Store materials away from drainages or waterways.  Recycle asphalt and pavement material when feasible. Material that cannot be recycled must be disposed of in accordance with applicable regulations. See BMP Fact Sheets for Inlet Protection, Silt Fence and other perimeter controls selected for use during paving and grinding operations. Maintenance and Removal Perform maintenance and removal of inlet protection and perimeter controls in accordance with their respective fact sheets. Promptly respond to spills in accordance with the spill prevention and control plan. Paving and Grinding Operations Functions Erosion Control No Sediment Control No Site/Material Management Yes Exhibit G – BMP Installation Log Choice Center Filing 3 – Fort Collins, CO February 2017 BMP INSTALLATION LOG Project: Choice Center Filing 3 Location: 1721 S. College Avenue Fort Collins, CO 80525 BMP Name Date Installed Description of BMP Installed Responsible Party Exhibit H – SWMP Inspection Reports EPA SWPPP Inspection Report, Version 1.1, September 17, 2007 1 Sample Inspection Report Instructions This sample inspection report has been developed as a helpful tool to aid you in completing your site inspections. This sample inspection report was created consistent with EPA’s Developing Your Stormwater Pollution Prevention Plan. You can find both the guide and the sample inspection report (formatted in Microsoft Word) at www.epa.gov/npdes/swpppguide This inspection report is provided in Microsoft Word format to allow you to easily customize it for your use and the conditions at your site. You should also customize this form to help you meet the requirements in your construction general permit related to inspections. If your permitting authority provides you with an inspection report, please use that form. For more information on inspections, please see Developing Your Stormwater Pollution Plan Chapters 6 and 8. Using the Inspection Report This inspection report is designed to be customized according to the BMPs and conditions at your site. For ease of use, you should take a copy of your site plan and number all of the stormwater BMPs and areas of your site that will be inspected. A brief description of the BMP or area should then be listed in the site-specific section of the inspection report. For example, specific structural BMPs such as construction site entrances, sediment ponds, or specific areas with silt fence (e.g., silt fence along Main Street; silt fence along slope in NW corner, etc.) should be numbered and listed. You should also number specific non-structural BMPs or areas that will be inspected (such as trash areas, material storage areas, temporary sanitary waste areas, etc). You can complete the items in the “General Information” section that will remain constant, such as the project name, NPDES tracking number, and inspector (if you only use one inspector). Print out multiple copies of this customized inspection report to use during your inspections. When conducting the inspection, walk the site by following your site map and numbered BMPs/areas for inspection. Also note whether the overall site issues have been addressed (customize this list according to the conditions at your site). Note any required corrective actions and the date and responsible person for the correction in the Corrective Action Log. EPA SWPPP Inspection Report, Version 1.1, September 17, 2007 2 Stormwater Construction Site Inspection Report General Information Project Name NPDES Tracking No. Location Date of Inspection Start/End Time Inspector’s Name(s) Inspector’s Title(s) Inspector’s Contact Information Inspector’s Qualifications Describe present phase of construction Type of Inspection:  Regular  Pre-storm event  During storm event  Post-storm event Weather Information Has there been a storm event since the last inspection? Yes No If yes, provide: Storm Start Date & Time: Storm Duration (hrs): Approximate Amount of Precipitation (in): Weather at time of this inspection?  Clear Cloudy  Rain  Sleet  Fog  Snowing  High Winds  Other: Temperature: Have any discharges occurred since the last inspection? Yes No If yes, describe: Are there any discharges at the time of inspection? Yes No If yes, describe: Site-specific BMPs  Number the structural and non-structural BMPs identified in your SWPPP on your site map and list them below (add as many BMPs as necessary). Carry a copy of the numbered site map with you during your inspections. This list will ensure that you are inspecting all required BMPs at your site.  Describe corrective actions initiated, date completed, and note the person that completed the work in the Corrective Action Log. BMP BMP Installed? BMP Maintenance Required? Corrective Action Needed and Notes 1 Yes No Yes No 2 Yes No Yes No 3 Yes No Yes No 4 Yes No Yes No 5 Yes No Yes No 6 Yes No Yes No 7 Yes No Yes No 8 Yes No Yes No 9 Yes No Yes No 10 Yes No Yes No 11 Yes No Yes No 12 Yes No Yes No 13 Yes No Yes No EPA SWPPP Inspection Report, Version 1.1, September 17, 2007 3 BMP BMP Installed? BMP Maintenance Required? Corrective Action Needed and Notes 14 Yes No Yes No 15 Yes No Yes No 16 Yes No Yes No 17 Yes No Yes No 18 Yes No Yes No 19 Yes No Yes No 20 Yes No Yes No Overall Site Issues Below are some general site issues that should be assessed during inspections. Customize this list as needed for conditions at your site. BMP/activity Implemented? Maintenance Required? Corrective Action Needed and Notes 1 Are all slopes and disturbed areas not actively being worked properly stabilized? Yes No Yes No 2 Are natural resource areas (e.g., streams, wetlands, mature trees, etc.) protected with barriers or similar BMPs? Yes No Yes No 3 Are perimeter controls and sediment barriers adequately installed (keyed into substrate) and maintained? Yes No Yes No 4 Are discharge points and receiving waters free of any sediment deposits? Yes No Yes No 5 Are storm drain inlets properly protected? Yes No Yes No 6 Is the construction exit preventing sediment from being tracked into the street? Yes No Yes No 7 Is trash/litter from work areas collected and placed in covered dumpsters? Yes No Yes No 8 Are washout facilities (e.g., paint, stucco, concrete) available, clearly marked, and maintained? EPA SWPPP Inspection Report, Version 1.1, September 17, 2007 4 BMP/activity Implemented? Maintenance Required? Corrective Action Needed and Notes 9 Are vehicle and equipment fueling, cleaning, and maintenance areas free of spills, leaks, or any other deleterious material? Yes No Yes No 10 Are materials that are potential stormwater contaminants stored inside or under cover? Yes No Yes No 11 Are non-stormwater discharges (e.g., wash water, dewatering) properly controlled? Yes No Yes No 12 (Other) Yes No Yes No Non-Compliance Describe any incidents of non-compliance not described above: CERTIFICATION STATEMENT “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 gathered and evaluated 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.” Print name and title: ___________________________________________________________________________ Signature:_________________________________________________________ Date:_____________________ Exhibit I – BMP Corrective Action Log Choice Center Filing 3 – Fort Collins, CO February 2017 BMP CORRECTIVE ACTION LOG Project: Choice Center Filing 3 Location: 1721 S. College Avenue Fort Collins, CO 80525 Date Identified Inspector Description of BMP Deficiency Corrective Action Taken Date Completed Exhibit J – SWMP Amendment Log Choice Center Filing 3 – Fort Collins, CO February 2017 SWMP AMENDMENT LOG Project: Choice Center Filing 3 Location: 1721 S. College Avenue Fort Collins, CO 80525 Amendment No. Date Description of Amendment Exhibit K – Erosion and Sediment Control Escrow/Security Calculation Project: Disturbed Acres: 0.60 EROSION CONTROL BMPs Units Estimated Quantity Unit Price Total Price LF 159 $2.50 $397.50 EA 2 $500.00 $1,000.00 EA 1 $500.00 $500.00 EA 1 $1,250.00 $1,250.00 SY 58 $0.50 $29.00 Sub-Total: $3,176.50 1.5 x Sub-Total: $4,764.75 Amount of security: $4,764.75 AC 0.6 $1,090.00 $654.00 $1,090.00 Sub-Total: $654.00 1.5 x Sub-Total: $981.00 Amount to Re-seed: $981.00 Minimum escrow amount: $3,000.00 Erosion Control Escrow: $4,764.75 Erosion and Sediment Control Escrow/Security Calculation for The City of Fort Collins BMP Amount Silt Fence (SF) Vehicle Tracking Control (VTC) Erosion Control Blanket (EB) Reseeding Amount Miniumum Escrow Amount Choice Center Filing 3 Unit Price of Seeding per acre: “The amount of the security must be based on one and one-half times the estimate of the cost to install the approved measures, or one and one-half times the cost to re-vegetate the disturbed land to dry land grasses based upon unit cost determined by the City's Annual Revegetation and Stabilization Bid, whichever is greater. In no instance, will the amount of security be less than one thousand five hundred dollars ($1,500) for residential development or three thousand dollars ($3,000) for commercial development” Inlet Protection (IP) Concrete Washout (CW) Final Escrow Amount 2/7/2017 3:47 PM K:\CHS_LDEV\168450002_CORE_FortCollins_CO_(College)\5 Feasibility\Stormwater\Erosion Control\Escrow_Calculation.xls Yes No Yes No Survey Area Data: Version 11, Sep 23, 2016 Soil map units are labeled (as space allows) for map scales 1:50,000 or larger. Date(s) aerial images were photographed: Apr 22, 2011—Apr 28, 2011 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. 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