2013-08-03 Custom Plywood Mill Site (07) (1024x680)
Fidalgo Bay.
Phase III, 2019: Final phase of remedial action for approximately 10.4 acres of subtidal sediments; 4.7 acres of those sediments support eelgrass. The planned Phase III remedial action, as proposed, consists of:
Placement of a thin layer cap (between 2 to 8-inch thickness) over approximately 10 acres of subtidal sediments with dioxin concentration greater than 10 nanograms per kilogram (ppt) TEC (but less than 25 ppt) Dredging and backfilling 0.46 acres of sediment in excess of 25 ppt dioxins and wood waste accumulation greater than 1-foot below the mud line within eelgrass beds.
Eelgrass mitigation using advanced mitigation plantings from Phase II along with additional mitigation efforts to compensate for the loss of eelgrass bed due to dredging (0.38 acres out of 0.46 acre dredge footprint supports eelgrass)
Phase II, 2013: the Department of Ecology removed old creosote dock pilings and other in-water concrete and metal structures. Dug up and dredged about 10 acres of sediment contaminated with dioxins and wood waste. Disposed of contaminated sediment off-site.Improve the near-shore habitat by reshaping an existing spit and jetty. Connected Fidalgo Bay with the wetland area that was created in 2011. The site was vacant property (2013) with abandoned building remnants and debris. A sawmill and wood-box factory, and then a plywood mill, operated on the site for almost a century. Mill features included a hog-fuel boiler, drum storage tank area, transformer yard, above-ground storage tanks containing fuel oil, gasoline, diesel and/or propane, phenolic formaldehyde resin and caustic storage tanks (both used in making plywood glue), a machine shop, a metal shop, and an area for spraying paint and oil.
Phase I, 2011: work focused on cleaning up about 6 upland acres. It included removing pilings and other structures to allow excavation of about 33,600 tons of contaminated soil; off-site disposal of the soil, structures and pilings; and backfilling the site with about 39,000 tons of clean soil. Site soil contains elevated concentrations of arsenic, cadmium, chromium, copper, lead, mercury, nickel, selenium, silver, zinc, oil-range petroleum hydrocarbons, dioxins, and furans. Groundwater beneath the site does not meet drinking water standards. The water also contains elevated concentrations of arsenic, copper and nickel. Dioxins and wood debris contaminate Marine sediments are found to be contaminated with dioxins and wood debris.
2013-08-03 Custom Plywood Mill Site (07) (1024x680)
Fidalgo Bay.
Phase III, 2019: Final phase of remedial action for approximately 10.4 acres of subtidal sediments; 4.7 acres of those sediments support eelgrass. The planned Phase III remedial action, as proposed, consists of:
Placement of a thin layer cap (between 2 to 8-inch thickness) over approximately 10 acres of subtidal sediments with dioxin concentration greater than 10 nanograms per kilogram (ppt) TEC (but less than 25 ppt) Dredging and backfilling 0.46 acres of sediment in excess of 25 ppt dioxins and wood waste accumulation greater than 1-foot below the mud line within eelgrass beds.
Eelgrass mitigation using advanced mitigation plantings from Phase II along with additional mitigation efforts to compensate for the loss of eelgrass bed due to dredging (0.38 acres out of 0.46 acre dredge footprint supports eelgrass)
Phase II, 2013: the Department of Ecology removed old creosote dock pilings and other in-water concrete and metal structures. Dug up and dredged about 10 acres of sediment contaminated with dioxins and wood waste. Disposed of contaminated sediment off-site.Improve the near-shore habitat by reshaping an existing spit and jetty. Connected Fidalgo Bay with the wetland area that was created in 2011. The site was vacant property (2013) with abandoned building remnants and debris. A sawmill and wood-box factory, and then a plywood mill, operated on the site for almost a century. Mill features included a hog-fuel boiler, drum storage tank area, transformer yard, above-ground storage tanks containing fuel oil, gasoline, diesel and/or propane, phenolic formaldehyde resin and caustic storage tanks (both used in making plywood glue), a machine shop, a metal shop, and an area for spraying paint and oil.
Phase I, 2011: work focused on cleaning up about 6 upland acres. It included removing pilings and other structures to allow excavation of about 33,600 tons of contaminated soil; off-site disposal of the soil, structures and pilings; and backfilling the site with about 39,000 tons of clean soil. Site soil contains elevated concentrations of arsenic, cadmium, chromium, copper, lead, mercury, nickel, selenium, silver, zinc, oil-range petroleum hydrocarbons, dioxins, and furans. Groundwater beneath the site does not meet drinking water standards. The water also contains elevated concentrations of arsenic, copper and nickel. Dioxins and wood debris contaminate Marine sediments are found to be contaminated with dioxins and wood debris.