Notes
Exhibit AR032547 from Washington State Department of Ecology (Ecology), Volume V – Runoff Treatment BMPs, August 2001. Covers phosphorus removal treatment trains (Table 3.1), Enhanced Treatment Menu (Section 3.4) and Basic Treatment Menu (Section 3.5) for stormwater management. Specifies requirements for industrial, commercial, multi-family project sites, arterials and highways discharging to fish-bearing streams or lakes. Documents approved sand filter amendments (processed steel fiber, crushed calcitic limestone), Large Sand Filter, Amended Sand Filter, Stormwater Treatment Wetland, Stormfilter with iron-infused media, infiltration pretreatment options, and two-facility treatment trains (Table 3.2) for dissolved metals removal including copper (0.003–0.02 mg/l) and zinc (0.02–0.3 mg/l). References Stormfilter leaf compost and zeolite media for dissolved metals removal.