RG Haley, Sediment and Upland Cleanup- Bellingham, WA
CRETE prepared the design and bid documents for in-situ soil mixing of contaminated shoreline soil for this brownfield redevelopment at a former lumber mill and wood-treating site on Bellingham Bay.
Wood treating operations resulted in soil, groundwater, and sediment contamination with total petroleum hydrocarbons (TPH; medium aromatic carrier oil) and pentachlorophenol (PCP).
Work Performed
- CRETE completed treatability testing to provide: 1) a site-specific assessment of in-situ soil solidification (ISS); and, 2) conditioning of removed intertidal sediment for upland consolidation.
- Treatment at this site was complicated by the presence of a significant number of wood piles and wood debris within the treatment area.
- The design included development of the ISS mix to allow use of the ISS monolith as shoring for intertidal sediment removal.
- The overall objectives of the ISS treatability testing were to demonstrate that ISS can achieve the preliminary performance criteria and to provide an estimated amendment recipe. An additional goal is to develop an economical mix that uses locally available products.
- Based on the results of the treatability testing, the final ISS design was included in the final Cleanup Action Plan and construction bid documents.