» STORMWATER POLLUTION PREVENTION PLANS (SWPPP) :
National Pollutant Discharge Elimination System (NPDES) Permits are required to prevent the transport of sediment-laden storm water and other visible and non-visible construction related pollutants into local surface waters, including municipal storm drains. AES’s water quality staff has extensive expertise in preparing SWPPPs and a working knowledge of current State and Federal NPDES General Permitting requirements. Under the State Water Resources Control Boards (SWRCB) Adopted Order 2009-0009-DWQ, all SWPPP documents prepared for new construction projects filing for coverage under the State’s NPDES General Permit for Storm Water Discharges Associated With Construction and Land Disturbance Activities [Construction General Permit (CGP)] must be prepared by a Qualified SWPPP Developer (QSD) and maintained by a Qualified SWPPP Practitioner (QSP). AES’s Certified Erosion, Sediment and Storm Water Inspectors (CESSWI) and California Certified Professional Engineers (PE) meet all current state requirements for the development and implementation of SWPPPs for projects covered under the CGP.
Additionally, adopted Order 2009-0009-DWQ now requires that Risk Levels be determined for each construction site based on a sediment erosivity index and receiving water body risk (i.e. Clean Water Act (CWA) Section 303(d) list of impaired water bodies and beneficial use designations). AES offers a full suite of professional services pertaining to storm water compliance including water quality sampling and analysis (Risk Levels II and III) and surface water rapid bio-assessments (Risk Level III sites greater than 30 acres). In conjunction with developers, SWPPPs prepared by AES staff have been included in project submittals to various local and state agencies for an array of permit approvals including grading permits, encroachment permits, and streambed alteration permits.
The CGP requires a SWPPP to be present on-site and available to local, state, and federal compliance inspectors. AES staff has expertise in SWPPP document preparation, compliance inspections, identifying and remediating failed erosion and sediment controls and developing Better Management Practices (BMPs) that aim to prevent erosion and sediment laden runoff from leaving the construction site.
Stormwater related services include:
- Compliance with U.S. Environmental Protection Agency and California Regional Water Quality Control Board stormwater regulations.
- Working with the Legally Responsible Person/Owner (LRP) to register on the Stormwater Multi Application Reporting and Tracking System (SMARTS) database, file the electronic Notice of Intent (NOI) for the proposed project, and help designate the approved signatories and data submitters for the project consistent with Adopted Order 2009-0009-DWQ.
- Development of a Spill Response and Implementation Plan (SRIP) and Potential Pollutant Source (PPS) list which will identify all potential pollutants (both visible and non-visible) on the construction site.
- Developing Construction Site Monitoring Program (CSMP) to demonstrate that the site is in compliance with the Discharge Prohibitions and applicable Numeric Action Levels (NALs)/Numeric Effluent Limitations (NELs) of the CGP.
- Developing a comprehensive BMP plan and Rain Event Action Plan (REAP) using the Best Available Technology (BAT) to significantly reduce the potential that NAL’s or NEL’s will be exceeded during Qualifying Rain Events (QRE) of 0.5 inches of rainfall or greater over a 24 hour period.
- Identify a sampling and analysis strategy and sampling schedule for discharges which flow directly into high risk water bodies listed on the CWA Section 303(d) List of Impaired Water Bodies.