Copart Auto Auction Facility Stormwater Compliance

(Portland, OR)  Landau Associates provided stormwater permit compliance services to Copart for their salvage auto auction facility adjacent to the Columbia Slough in Portland, Oregon. We assisted Copart in applying for and complying with the National Pollutant Discharge Elimination System (NPDES) stormwater discharge permit, which for the Columbia Slough is the 1200-COLS General Permit (Permit) jointly administered by Oregon Department of Environmental Quality (DEQ) and the City of Portland. The Permit requires stormwater sampling for protection of the Columbia Slough and establishes stormwater quality benchmark values for nine parameters: copper, lead, zinc, pH, total suspended solids (TSS), oil and grease, E. coli, biological oxygen demand, and total phosphorous.

We prepared a Stormwater Pollution Control Plan (SWPCP) for the facility in accordance with state and municipal regulations; implemented stormwater best management practices (BMPs) including erosion control features; and installed an oil/water separator to improve water quality of facility stormwater runoff. As part of the SWPCP, we prepared a facility map showing stormwater drainage directions, conveyance systems, and sampling locations. BMPs for the facility were developed and documented in the SWPCP, which was reviewed and accepted by both DEQ and the City of Portland.

Landau Associates also worked with Copart staff to implement low-cost facility improvements such as expanding paving in areas subject to erosion, and catch basin area improvements designed to provide additional stormwater filtration.