No further action
1
Soils contaminated with petroleum products; GW contaminated with VOCs
No further action at source areas ST49, SS53, and DP54; passive skimming system at SS51; installation of SVE system at ST20, SS50, SS51, and SS52; monitoring; institutional controls
2
Soil and GW contaminated with VOCs and lead
No Action at ST11, ST18, and ST19; active skimming system for fuel removal at ST13 and DP26; passive skimming systems at ST10 and SS14; GW extraction and treatment via air stripping at ST13 and DP26; monitoring at ST19, ST10, SS14, ST13, and DP26; institutional controls
6
Soil and GW contaminated with VOCs
GW monitoring; institutional controls
2nd
Source area ST41 GW primarily contaminated with BTEX, TCE, and heavy metals
GW extraction and treatment via air stripping to meet MCLs; disposal of treated GW via discharge to municipal waste water system; monitoring
1
GW contaminated with manganese
GW monitoring; institutional controls
5
Soil, sediment, GW, and SW contaminated with heavy metals
Excavation and on-site treatment of 3,000 cys. of soil; natural attenuation of aquifer; institutional controls; monitoring
2
GW contaminated with heavy metals
Containment; pump and treat GW via air stripping; clean and fill ST41 USTs; GW monitoring; and institutional controls
Site 11 and Site 13
GW contaminated with heavy metals, VOCs, SVOCs, PCBs, and pesticides
Palisades Landfill construction of interceptor ditches; additional LF cover of 6 acres; institutional controls; and monitoring Present Worth - $2,275,000 O&M - $288,000 Metals Landfill Removal of shoreline debris that could adversely affect the marine environment; construction of interceptor ditches; additional landfill cover over 17 acres; GW monitoring; institutional controls Present Worth - $5,521,000 O&M - $521,000
Soil contaminated primarily with BTEX, acetone, and PCBs
No Action
Soils contaminated with antimony, arsenic, cadmium, copper, lead, mercury, and zinc
Remove contaminated surface soil; revegetation of yards; dust suppression; institutional controls; monitoring
10-05
Soil contaminated primarily with TNT; site shows explosive risks due to unexploded artillery shells and anti-tank mines
Records search for other suspected ordnance locations; controlled detonation of unexploded ordnance; removal, containerization, and off-site disposal of contaminated soils in excess of 44 mg/kg for TNT
5-13
Power Burst Facility Corrosive Waste Sump and Evaporation Pond contaminated primarily with chromium
Pond stabilization via grouting and disposal of contaminated material (chromium in excess of 800 mg/kg) at the Radioactive Waste Management Complex
2-12
No action
5-10
No action
4-11
No action
7-10
Soil contaminated with radionuclides, VOCs, and PCBs
Excavation and segregation of soils in excess of 10 nCi/g TRU; chemical extraction, separation, and stabilization Present Worth - $82,611,000 O&M - $29,102,000
8-07, 8-06, 8-05
Soil contaminated with heavy metals
Sites 8-05-59, 8-06-35, 8-06-36, 8-06-48, 8-06-49, and 8-06-50 require no further action; sites 8-05-1, 8-05-51, and 8-06-53, in accordance with Presumptive Remedy, will require installation of native soil cover; soil gas monitoring, and institutional controls
7-08
Soil contaminated with CCI4, PCE, TCE, and 1,1,1-TCA
Extraction/treatment via VVE; installation of vapor extraction wells; installation of off-gas treatment systems; soil vapor monitoring; institutional controls Present Worth Phase 1 - $12,860,000 Present Worth Phase 2 - $21,970,000 Present Worth Phase 3 - $32,360,000
1st
Soil contaminated with PCBs
Excavation/fixation of contaminated soils; construction of a cap over entire area; construction of a bottom liner where necessary; construction of groundwater monitoring wells
4th
Soils contaminated with VOCs
No Action
2
Soils and GW contaminated with VOCs, SVOCs, and metals
No Action
Soil and GW contaminated with petroleum hydrocarbons and NAPLs
Excavation and disposal of soil, sludge, and silt; fencing; monitoring
Soil and GW contaminated with petroleum hydrocarbons and NAPLs
Amended ROD eliminates three components no longer necessary to protect HH&E: soil flushing; dissolved air flotation as part of GW treatment; and construction of fence around entire sludge pit
Soils and GW contaminated with metals
No further action; institutional controls
1st
Battery casings and matte (smelting waste product) contaminated with lead and buried onsite; surface soils, subsurface soils and sediments contaminated with lead
Recycling of battery casings to remove lead; reduce the mobility of lead in the contaminated soil, sediment and matte through fixation; continued monitoring of surface and groundwater; monitor ambient air around site
1st
Soils contaminated with arsenic, PAHs, and fluoride; GW contaminated with fluoride and sulfate
Consolidate residual waste material and underlying fill material into the existing landfill; cap the landfill with a multi-media RCRA cap; place a soil cover over sludge ponds; plug and abandon nearby production wells and connect users to municipal water supply system; collect and treat leachate generated from the landfill and perched water; recover contaminated groundwater; implement groundwater monitoring and a contingency plan
1
Soil contaminated with lead
Excavation; solidification/ stabilization; on-site disposal of treated soil at active landfill Present Worth - $957,600 O&M - $618,800
8 (Active Landfill OU)
Soil and GW contaminated with VOCs, SVOCs, metals, PCBs, and pesticides
No Action; low permeability cap; GW monitoring; landfill closure
5 (Inactive Landfills OU)
Soil and GW contaminated with lead
No Action
5
Soil contaminated with mercury
No Action; five year review not required
2
Soil and GW contaminated with TNT, DNT, RDX, and metals
Excavation and organic amendment to enhance biological degradation of ordnance; GW extraction and treatment via GAC; monitoring
4
No action
6
Soil contaminated with TNT, DNT, RDX, and metals
On-base composting of ordnance-contaminated soils in excess of established cleanup levels
1
Soils contaminated primarily with PCBs, PAHs, and PCP
Excavation and off-site disposal of soils; treatment of Wood Pole Storage Area East soils on-site via bioremediation; institutional controls
2
Soil and GW contaminated with VOCs, SVOCs, PAHs, PCBs, pesticides, and metals
Capping, and institutional controls Present Worth - $240,000
PCB contaminated soil and GW
On-site incineration of PCB contaminated solids
1st
GW contaminated with TCE, PCE, VOCs and methlyene chloride
Alternate water supply
1st
Soil and SW contaminated with VOCs including benzene, organics including PAHs and PCBs, and metals including lead
Excavation and stabilization of soils exceeding one percent total PAHs; excavation and stabilization of all surface soils exceeding 10-6 lifetime cancer risk; removal and stabilization of ponded water; onsite disposal of treatment residuals; asphalt capping of stabilized matrix; SW diversion; GW monitoring; implementation of institutional controls including land and water use restrictions
2nd
Asarco Tacoma Smelter and Slag Peninsula contaminated with heavy metals (arsenic, copper, lead)
Excavation of 160,000 cys. of soil and slag; on-site containment; cap entire site; building demolition; drainage system replacement; monitoring; institutional controls Present Worth - $45,300,000
1st
Groundwater contaminated with VOCs, semi-VOCs and metals; release of methane gas
Gas extraction system to eliminate off-site gas migration; groundwater extraction/treatment system; constraints on further site operations; capping of landfill; monitoring of groundwater, surface water, gas probes and air emissions; provide an alternate water supply to any residents deprived of their domestic supply due to demonstrated contamination from the landfill or due to the action of the extraction/treatment system
Sub
Sediments contaminated with PCBs, arsenic, hexachlorobenzene, tetrachloroethene, hexachlorobutadiene and bis(2-ethylhexyl)phthalate
Site use restrictions; habitat mitigation and fisheries enhancement projects; Confinement of sediments using in-situ capping of contaminated sediments, or maintenance dredging in areas which are precluded by capping (such as shipping navigation areas), or confined aquatic disposal, nearshore disposal of dredged sediments, or upland disposal of dredged material; monitoring
7th
Soils, dust contaminated with arsenic, antimony, cadmium, chromium, copper, lead, nickel, and zinc
Demolish, dismantle selected on-site structures; off-site disposal of hazardous materials
2nd
Soil, slag, and SW COCs include metals, primarily arsenic, copper, and lead
Excavation and on-site containment; capping of entire site; demolition of remaining buildings; armor portions of plant site; monitoring; institutional controls Present Worth - $45,300,000
South Tacoma Field
Soil and GW contaminated with PCBs and VOCs
Excavation and solidification of South Tacoma Field soils in hot spot area that exceed threshold; capping; institutional controls; monitoring; air sparging and in situ vapor extraction of subsurface soils and GW at Pioneer Builders Supply; excavation and off-site incineration of soils in excess of 50 ppm at Tacoma City Light Dry Wells
1 (Craig Rd. Landfill)
Soil and GW contaminated with VOCs
Construction of landfill cap; installation of active soil vapor extraction/treatment system; GW extraction and treatment via air stripping and granular activated carbon; monitoring; and institutional controls Present Worth - $8,722,073 O&M - $46,000 to $393,000
Pesticide contamination in soil and GW
Excavation and on-site incineration of soils; the ash will be used for backfill on-site, if health based cleanup goals are met; GW monitoring
Landfill 4; Coal Pilot Plant
Soil and GW contaminated with PAHs and VOCs
Soil thermal destruction; GW institutional controls Present Worth - $4,857,000
1st
GW and soil contaminated with chromium, lead, nickel and organic solvents
Excavation of chromium contaminated soils; onsite treatment by chemical stabilization; replacement of treated materials; demolition of contaminated building onsite; cover to prevent leaching and runoff
2nd
Groundwater contaminated with chromium
Pump and treat groundwater (50 ppm chromium) to remove chromium and organic solvents to a level that would protect aquatic life in the Columbia River or to a level that could be accepted in the city's sanitary sewer; development of regulatory controls to restrict the use of groundwater and to control the drilling of new wells
No further action; long term monitoring is not required.
1100-EM-1 2, 3 & IU-1
Soil and GW contaminated with metals, VOCs, PCBs, PAHs, and BEHP
Off-site incineration of BEHP; off-site disposal of PCB soils; landfill capping; GW monitoring; and inst. controls Present Worth - $10,840,000
OUs w/in 100, 200, and 300 Area NPL sites of Hanford
Soil and GW contaminated with metals, VOCs, PCBs, PAHs, and BEHP
Construction and operation of two disposal cells; modified RCRA-compliant closure cover over the waste; monitoring; and institutional controls Net Present Worth - $779,000,000
Soil and GW contaminated with TPH, lead, PAHs, PCBs, LNAPLs, and metals
Soil excavation; thermal desorption on-site; PCB hot spot soils treated and disposed of off-site; capping; institutional controls Present Worth - $40,200,000
Lockheed Shipyard
Soil and GW contaminated with TPH, VOCs, SVOCs
Excavation and treatment of soils via on-site thermal desorption; capping exposed contaminated soil that exceeds inorganic and organic cleanup goals; institutional controls; monitoring Net Present Worth - $1,300,000 (soil) $300,000 (GW)
GW contaminated with high concentrations of TCE
Installation of GW extraction wells
GW contaminated with 2-methylnaphthalene, fluorene, and phenanthrene
Installation of extraction trenches; extraction and off-site recycling of fuel; monitoring
1st
GW contaminated primarily with chlorinated solvent
concentrations over 2,000
Extraction and treatment of GW via metal precipitation, air stripping, and vapor phase activated carbon
2nd
Surface soil and GW contaminated with heavy metals, PCBs, PAHs, dioxin, and pesticides
Excavation and off-site disposal of PCB-contaminated surface soil; excavation and on-site disposal at Landfill 6 of PAH-contaminated surface soil; monitoring; institutional controls
3rd
Runway ditches contaminated with heavy metals, PAHs, and TPH
Excavation and disposal of sediment in Area 6 Landfill; capping Total Present Worth - $0.6 to $1.2 million
2
Soil and GW contaminated with metals and VOCs
Institutional controls; monitoring; excavation of vadose zone soil hot spots and off-site disposal; sediment sampling
1st
GW contaminated with VOCs and metals
Closure of landfill and capping after closure; pumping and treating the contaminated GW to reduce the amount of contaminants entering the aquifer; GW monitoring around the landfill and downgradient from it; alternate water supply to affected residents; deed restrictions to protect the cap, closed units, and monitoring wells from unauthorized access and to address the construction of domestic wells in the contaminant plume; controlling landfill gas emissions
1st
Soil and GW contaminated with PCBs
Excavation, consolidation, and treatment on PCB-contaminated soils greater than 10 ppm PCBs; abandonment of the on-site well; placement of two feet of clean fill over the entire site; comprehensive GW monitoring program; sampling of on-site wood structure to determine contamination
Soils and debris contaminated with PCBs
Off-site treatment and disposal of PCB-contaminated soils and debris
No further action
Soil and GW contaminated primarily with VOCs
Isolation and consolidation of contaminated soils with a slurry wall/cap; GW extraction and treatment if necessary; monitoring; and administrative controls
1st
Heap leaching operation left cyanide and arsenic contamination
Consolidating and grading contaminated materials; cover with clay cap
GW
GW contaminated with DNAPL, LNAPL
Replacement of existing GW treatment plant; upgrade existing extraction system; seal and abandon on-site water supply Net Present Worth - $24.7M to $28.2M
East Harbor
Sediments contaminated with PAHs
Monitoring and maintainance of existing cap; institutional controls Net Present Worth - $14,500,000
No further action; activities taken under RCRA have resulted in clean closure
Soils contaminated primarily with DDD, DDE, DDT, and inorganics
Off-site treatment and disposal of contaminated tanks, sludges, and soils; institutional controls for GW; monitoring
To obtain copies of selected Records of Decision, please fill out the INSS request form or e-mail your request to inss@envinfo.com. The Network also can be reached via telephone at (202) 467-7777 or FAX at (202) 467-7176.