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K:\Public Works\Engineering\NPDES\Forms\STORMWATER CONTROL PLAN CHECKLIST_10,000 square feet.doc 1 of 2 STORMWATER CONTROL PLAN CHECKLIST Under the City’s National Pollution Discharge Elimination System (NPDES) permit, new and redevelopment projects that create or replace more than 10,000 square feet of impervious area must treat and/or detain stormwater runoff before it is discharged to creeks or storm drains. In order to meet this requirement, project applicants must prepare a Stormwater Control Plan (SCP). Below is a list of required contents of each SCP. Note: An acceptable SCP will contain plans and a narrative report. Prior to receiving final approval, the SCP must be accepted and approved by the Department of Public Works. If you have further questions, contact the Department at 215-4382 or consult the Contra Costa Clean Water Program Stormwater C.3 Guidebook, available at: www.cccleanwater.org/construction/Publications/Guidebook/StormwaterGuidebook_2nd_Edition_Complete.pdf Project: Required Adequate STORMWATER CONTROL PLAN REQUIREMENTS CONTENTS OF PLAN (Show on Drawings) X Existing natural hydrologic features (depressions, watercourses, relatively undisturbed areas) and significant natural resources. (Step 1 ) X Soil types and depth to groundwater (if infiltration is proposed). See Appendix C. (Step 1)1 X Existing and proposed site drainage network and connections to drainage off-site. (Step 3) X Proposed design features and surface treatments used to minimize imperviousness. (Steps 3 and 4) X Separate drainage areas, depending on complexity of drainage network. (Steps 3, 4, and 5) X Existing condition of each drainage area, including pervious and impervious areas. (Steps 3, 4, and 5) X For each drainage area, types of impervious area (roof, plaza/sidewalk, and streets/parking) and area of each. (Steps 3, 4, and 5) X Proposed locations and approximate sizes of infiltration, treatment, or hydrograph modification BMPs. (Steps 4 and 5) X Pollutant source areas, including loading docks, food service areas, refuse areas, outdoor processes and storage, vehicle cleaning, repair or maintenance, fuel dispensing, equipment washing, etc., and corresponding required source controls from Appendix E. (Step 6) CONTENTS OF NARRATIVE REPORT X Narrative analysis or description of site features and conditions that constrain, or provide opportunities for, stormwater control. (Step 2) X Narrative description of site design characteristics that protect natural resources. (Step 3) X Narrative description and/or tabulation of site design characteristics, building features, and pavement selections that reduce imperviousness of the site. (Step 3) X Tabulation of pervious and impervious area, showing self-retaining areas and areas tributary to each infiltration, treatment, or hydrograph modification BMP. (Steps 3, 4, and 5) X Preliminary designs, including calculations, for each treatment or hydrograph modification 1 Refer to Contra Costa Clean Water Program Stormwater C.3 Guidebook ---PAGE BREAK--- K:\Public Works\Engineering\NPDES\Forms\STORMWATER CONTROL PLAN CHECKLIST_10,000 square feet.doc 2 of 2 Required Adequate STORMWATER CONTROL PLAN REQUIREMENTS management BMP. Elevations should show sufficient hydraulic head for each. (Step 5) X A table of identified pollutant source areas and for each, the source control measure(s) used to reduce pollutants to the maximum extent practicable. See worksheet in Appendix E. (Step 6) X Identification of any conflicts with codes or requirements or other anticipated obstacles to implementing the Stormwater Control Plan (Step X General description of maintenance needs for treatment/hydrograph modification BMPs (Step 9) X Means by which BMP maintenance will be financed and implemented in perpetuity. (Step 9) X Statement accepting responsibility for interim operation & maintenance of treatment BMPs (Step X Construction Plan C.3 Checklist (Step 10). X Certification by a civil engineer, architect, and landscape architect (Step 10). Stormwater Control Plan accepted by: