Eric Pilcher

Available options for treating log yard stormwater would appear to be relatively expensive based on two recently completed projects in Washington State. In 2013–2014, multimillion dollar treatment facilities were constructed at the waterfront log handling facilities of two different Ports. However, a more cost-effective approach was implemented at a northern California sawmill site in late 2015. In all cases, treatment was required to reduce concentrations of chemical oxygen demand (COD) to… Show more

Available options for treating log yard stormwater would appear to be relatively expensive based on two recently completed projects in Washington State. In 2013–2014, multimillion dollar treatment facilities were constructed at the waterfront log handling facilities of two different Ports. However, a more cost-effective approach was implemented at a northern California sawmill site in late 2015. In all cases, treatment was required to reduce concentrations of chemical oxygen demand (COD) to meet the U.S. Environmental Protection Agency (EPA) COD benchmark (120 mg/L). This paper summarizes the state of the practice for treating log yard stormwater and describes the lessons learned from the more economical approach used at the northern California sawmill. Show less

In winter 2011/12, the City of Seattle (City) completed a Non-Time Critical Removal Action to address contaminated sediment at the Slip 4 early action site located within the Lower Duwamish Waterway (LDW) Superfund Site in Seattle, WA. Slip 4 is a 6.4-acre navigational slip located three miles upstream from the confluence with Elliot Bay and Puget Sound. It is one of five priority early action sites identified within the 5.5-mile long LDW Superfund site. Approximately 3.5 acres of sediment… Show more

In winter 2011/12, the City of Seattle (City) completed a Non-Time Critical Removal Action to address contaminated sediment at the Slip 4 early action site located within the Lower Duwamish Waterway (LDW) Superfund Site in Seattle, WA. Slip 4 is a 6.4-acre navigational slip located three miles upstream from the confluence with Elliot Bay and Puget Sound. It is one of five priority early action sites identified within the 5.5-mile long LDW Superfund site. Approximately 3.5 acres of sediment within the Slip was contaminated with polychlorinated biphenyls (PCBs), along with metals, organic compounds, and petroleum products. The primary design elements included dredging and offsite disposal of ±10,000 cy of contaminated sediment, placement of ±30,700 cy of capping materials, demolition of a large pier structure, and habitat improvements along the riverbank and intertidal areas. The primary objective of the Slip 4 removal action was to reduce the concentrations of PCBs and other chemicals in the post-cleanup surface sediments to below the Washington State Sediment Quality Standards. Show less