Washington Ornamental Iron Works contracted with StormwateRx to design stormwater conveyance modifications, and to supply a stormwater treatment system including Clara basic separator and Aquip basic filtration to reduce concentrations of TSS, zinc, copper, iron, and nitrates in stormwater discharges. Washington Ornamental Iron Works undertook the project voluntarily and upon their own initiative to demonstrate its commitment to the community and protection of the environment. The project also assists the facility in demonstrating progress toward the stormwater benchmarks established in their industrial stormwater general permit by the California State Water Resources Control Board.
The StormwateRx stormwater treatment system includes a passive Clara® 90C plug flow separator installed in-line with the existing stormwater drainage lines for the reduction of particulates. The Clara then fed into an above-ground Aquip® 160SXI basic stormwater filtration system, which contained media for the reduction of finer particulates (TSS) and associated total heavy metals. StormwateRx engineers designed the stormwater management system to collect stormwater runoff from around the facility, routing it to a main outfall where the StormwateRx stormwater treatment systems are installed.
When the the state of California adopted its new Industrial General Permit, the facility was able to upgrade their Aquip stormwater filtration system to an enhanced filter bed design to capture additional dissolved pollutants, and to bring the facility into compliance with the current Industrial General Permit Numeric Action Levels (NALs.)