Aspect assisted in upgrading the stormwater management system for a municipal waste transfer station in Pasco. We authored a SWPPP, evaluated and designed upgrades to the stormwater treatment and disposal system to enhance protection of groundwater, and permitted the existing and new drywells under the Washington State’s UIC regulations.
Aspect designed an innovative media-filtration treatment system to complete a Level 3 Corrective Action at a 5-acre auto-recycling facility as a component of settling a Clean Water Act citizen suit. Our design was aimed at treating low to moderate levels of copper and turbidity. The media bed consisted of oyster shells over a bioretention soil mix. The system was constructed by the client at low cost. The client has not triggered a Level 2 or 3 Corrective Action since installation of the system.
After providing expert support during settlement of a Clean Water Act citizen suit, Aspect designed an above-ground media-filtration stormwater treatment system for a 5-acre marine terminal and barge loading facility on the Duwamish River. Our design included an innovative collection and conveyance system to avoid soil disturbance along the shoreline and reduce local permitting requirements. The client has not triggered a Level 2 or 3 Corrective Action since installation of the system in 2011.
A metal fabricator and electrical supplier was sued under the Clean Water Act for elevated concentrations in stormwater zinc just weeks before of a Level 3 Corrective Action deadline. Aspect quickly determined roofing was the primary source and negotiated installation of a roof downspout filter—meeting the deadline and greatly aiding settlement. After settlement, we assisted the client in coating the roof to avoid ongoing maintenance costs. The site now routinely meets all benchmarks.