List of Superfund sites in Washington (state)

Map of superfund sites in Washington

This is a list of Superfund sites in Washington State designated under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) environmental law. The CERCLA federal law of 1980 authorized the United States Environmental Protection Agency (EPA) to create a list of polluted locations requiring a long-term response to clean up hazardous material contaminations.^[1] These locations are known as Superfund sites, and are placed on the National Priorities List (NPL). The NPL guides the EPA in "determining which sites warrant further investigation" for environmental remediation.^[2] As of May 1, 2010, there were 48 Superfund sites on the National Priorities List in Washington.^[2] Seventeen others have been cleaned up and removed from the list; no sites are currently proposed for addition.^[2]

Superfund sites

  Deleted from National Priorities List

CERCLIS ID	Name	County	Reason	Proposed	Listed[3]	Construction completed[4]	Partially deleted[5]	Deleted[6]
WAD009045279	Alcoa (Vancouver Smelter)	Clark	Soil and groundwater contaminated by fluoride and cyanide and soil also contaminated by alumina.[7]	06/24/1988	02/21/1990	07/30/1996	–	09/30/1996
WAD057311094	American Crossarm & Conduit Co.	Lewis	Ground water, soil, and sediments were contaminated with PCP and creosote. The soil also contained dioxins.[8][9][10]	06/24/1988	10/04/1989	09/26/1996	–	–
WAD980833065	American Lake Gardens/McChord Air Force Base	Pierce	Shallow groundwater is contaminated with VOCs, including TCE and DCE.[11][12][13]	09/08/1983	09/21/1984	09/29/1994	–	–
WA5170027291	Bangor Naval Submarine Base (US Navy)	Kitsap	Groundwater, soils, surface water, and sediments contain TNT and RDX.[14][15][16]	07/14/1989	08/30/1990	09/25/2001	–	–
WA7170027265	Bangor Ordnance Disposal (USNAVY)	Kitsap	Groundwater, soil, leachate and surface water contaminated by TNT and RDX; soil contaminated by lead.[17]	101/5/1984	07/22/1987	09/23/1999	–	–
WA1891406349	Bonneville Power Administration Ross Complex (USDOE)	Clark	Soil was contaminated by PCBs, PAHs, PCP, lead and other heavy metals. Groundwater contains elevated levels of DCE and chloroform.[18]	07/14/1989	11/21/1989	04/04/1996	–	09/23/1996
WAD009624453	Boomsnub/Airco	Clark	Groundwater contaminated by chromium and VOCs, including TCE, PCE and freon-11. Soil on Boomsnub site contaminated by hexavalant chromium.[19]	01/18/1994	04/25/1995	–	–	–
WAD980836662	Centralia Municipal Landfill	Lewis	Groundwater contains elevated levels of chloride and heavy metals including manganese, arsenic and iron. Leachate has drained into nearby rivers.[20]	06/24/1988	08/30/1990	09/28/1999	–	–
WAD980514541	Colbert Landfill	Spokane	Soil and groundwater contamination from VOCs dumped on site, including methylene dichloride and TCA.[21]	12/30/1982	09/08/1983	09/09/1997	–	–
WAD980726368	Commencement Bay, Near Shore/Tide Flats	Pierce	At the Asarco smelter, metals including arsenic, cadmium, copper and lead were released into the soil, air and bay and metals from slag have migrated to surface and groundwater. Soil in the Ruston/North Tacoma study area is contaminated by arsenic and lead. Soil, surface water and groundwater across most of the Tacoma Tar Pits site is contaminated by metals, PAHs, PCBs, and VOCs including benzene, from a former coal gasification plant and recycling operations. Ship building, oil refining, chemical manufacture and storage and other industrial activity has contaminated the land and sediments of the bay with hazardous waste.[22]	12/30/1982	09/08/1983	–	10/29/1996	–
WAD980726301	Commencement Bay, South Tacoma Channel	Pierce	In the Tacoma Landfill site, soil and groundwater are contaminated by VOCs and heavy metals; groundwater is also contaminated by PAHs. Groundwater at Well 12A is contaminated by VOCs and soil by VOCs and lead. Industrial activities at South Tacoma Field led to soil contamination by lead, arsenic, copper and PCBs and groundwater contamination by VOCs and petroleum hydrocarbons.[23]	12/30/1982	09/08/1983	09/29/1999	06/14/2005	–
WA9571924647	Fairchild Air Force Base (4 Waste Areas)	Spokane	Groundwater, soil and sediments are contaminated by VOCs (primarily TCE), semi-volatile organic compounds and inorganic compounds.[24]	06/24/1988	03/13/1989	–	–	–
WAD000643577	FMC Corp. (Yakima Pit)	Yakima	Groundwater and soil contamination by pesticides including DDT and derivatives, which were formerly dumped in a "poison pit" on site.[25]	12/30/1982	09/08/1983	09/01/1993	–	–
WA9214053465	Fort Lewis (Landfill No. 5)	Pierce	Groundwater was contaminated by heavy metals and organic compounds.[26]	10/15/1984	07/22/1987	02/28/1995	–	05/22/1995
WA7210090067	Fort Lewis Logistics Center (USARMY)	Pierce	Soil and shallow groundwater contamination by VOCs including TCE, DCE and PAHs.[27]	07/14/1989	11/21/1989	–	–	–
WAD053614988	Frontier Hard Chrome, Inc.	Clark	Groundwater and soil contaminated by trivalent chromium and high concentrations of hexavalent chromium.[28]	12/20/1982	09/08/1983	09/22/2003	–	–
WAD001865450	General Electric Co. (Spokane Shop)	Spokane	On-site soil, groundwater and sludge contaminated by PCBs from electrical transformer repair and storage.[29]	06/24/1988	10/04/1989	03/18/1999	–	–
WAD980514608	Greenacres Landfill	Spokane	Groundwater contains VOCs, semi-volatile organic compounds and heavy metals. The site is close to the sole-source aquifer for 400,000 people.[30]	09/08/1983	09/21/1984	07/23/1999	–	–
WASFN1002174	Hamilton/Labree Roads GW Contamination	Lewis	Shallow drinking water aquifer contaminated by PCE and its decomposition products, and by tetrahydrofuran and methylene chloride. There are also very low levels of PCE contamination in soil and sediments.[31]	05/11/2000	07/27/2000	–	–	–
WA5210890096	Hamilton Island Landfill (USA/COE)	Skamania	Investigation showed that hazardous substances present did not pose a risk to human health or the environment.[32]	07/29/1991	10/14/1992	03/30/1995	–	05/25/1995
WA3890090076	Hanford 100-Area (USDOE)	Benton	Soils contaminated by radiological and chemical waste from plutonium manufacture for the Manhattan Project and subsequent activities. Groundwater contaminated by strontium-90, carbon-14, tritium and hexavalent chromium and discharges into the Columbia River, which is the water supply for over 170,000 people.[33]	06/24/1988	10/04/1989	–	07/08/1998	–
WA1890090078	Hanford 200-Area (USDOE)	Benton	Groundwater and soil contamination by tritium, uranium, cyanide, carbon tetrachloride, technetium and other substances from processing, finishing and managing nuclear materials including plutonium for nuclear weapons.[34]	06/24/1988	10/04/1989	–	–	–
WA2890090077	Hanford 300-Area (USDOE)	Benton	Groundwater contamination by uranium, VOCs, strontium-90 and tritium from nuclear fuel fabrication. Soil contamination by uranium, cobalt-60, copper, PCBs, chromium and possibly other substances. Uranium and TCE have been detected in groundwater adjacent to the Columbia River, which is used for drinking water for over 170,000 people.[35]	06/24/1988	10/04/1989	–	–	–
WA4890090075	Hanford 1100-Area (USDOE)	Benton	Wells contaminated by VOCs including TCE and soil by asbestos, heavy metals and PCBs from maintenance activities.[36]	06/24/1988	10/04/1989	07/25/1996	–	09/30/1996
WAD980722839	Harbor Island (Lead)	King	Groundwater contains benzene, ethylbenzene, xylene, mercury, cadmium, lead and zinc but is not a source of drinking water. Soil is contaminated primarily by heavy metals, PCBs and petroleum and sediments near the island by heavy metals, PAHs, tributyl tin and PCBs.[37]	12/30/1982	09/08/1983	–	11/07/1996	–
WAD980511539	Hidden Valley Landfill (Thun Field)	Pierce	Groundwater and leachate contaminated by metals, VOCs and nitrates.[38]	06/10/1986	03/31/1989	09/28/2000	–	–
WA3170090044	Jackson Park Housing Complex (US Navy)	Kitsap	Soil contamination by arsenic, cadmium, chromium, copper, lead, nickel, zinc, TNT, DNT, trinitrobenzene and dinitrobenzene from former ordnance operations. Offshore sediments contain abandoned ordnance.[39]	06/23/1993	05/31/1994	–	–	–
WAD000065508	Kaiser Aluminum Mead Works	Spokane	Cyanide and fluoride contamination of groundwater and leachate.[40]	12/30/1982	09/08/1983	–	–	–
WAD050075662	Lakewood Site	Pierce	Groundwater and soil contamination by TCE and PCE from dry cleaning operations.[41]	12/30/1982	09/08/1983	09/29/1992	11/27/1996	–
WAN001002655	Lockheed West Seattle	King	Past industrial practices have contaminated sediment with heavy metals including arsenic, chromium, copper, lead, silver and zinc, with butyl tins and with PCBs and PAHs.[42][43]	09/29/2006	03/07/2007	–	–	–
WA0002329803	Lower Duwamish Waterway	King	Sediment contamination by mercury, arsenic, other heavy metals, PCBs, PAHs, dioxins, furans and phthalates.[44][45][46]	12/01/2000	09/13/2001	–	–	–
WA8570024200	McChord Air Force Base (Wash Rack/Treat)	Pierce	A layer of benzene-contaminated fuel emulsion is sitting on top of the water table. Benzene levels in the groundwater have now fallen below EPA safe drinking water levels.[47]	10/15/1984	07/22/1987	03/29/1995	–	09/26/1996
WAD980511661	Mica Landfill	Spokane	Groundwater contains VOCs, heavy metals and phenols from licensed hazardous waste disposal. Leachate contamination by inorganic ions, metals and at least twenty regulated organic compounds. Methane is accumulating at potentially explosive levels.[48]	10/15/1984	06/10/1986	02/12/2002	–	–
WAD980978753	Midnite Mine	Stevens	Surface water, groundwater, soil and sediments contamination by metals and radionuclides from former uranium ore mining. Mine drainage is acidic.[49]	06/22/1999	05/11/2000	–	–	–
WAD980638910	Midway Landfill	King	Groundwater contamination by heavy metals and VOCs; landfill gas emissions contaminated by VOCs. Risks associated with heavy metals are now under control; groundwater VOCs are greatly reduced; gas VOCs have been addressed.[50]	10/05/1984	06/10/1986	09/21/2000	–	–
WAD988466355	Moses Lake Wellfield Contamination	Grant	Groundwater TCE contamination, including municipal and private wells. Wells within Federal drinking water standards have now been constructed.[51]	07/29/1991	10/14/1992	–	–	–
WA5170090059	Naval Air Station, Whidbey Island (Ault)	Island	Ault Field groundwater is contaminated by VOCs including TCE and TCA. Soils and sediments are contaminated by PCBs, heavy metals, pesticides, PAHs and dioxins.[52]	09/18/1985	02/21/1990	09/25/1997	–	–
WA6170090058	Naval Air Station, Whidbey Island (Seaplane)	Island	Soil in areas of the seaplane base was contaminated by heavy metals including lead and arsenic, pesticides and PAHs. Contaminated soil has been removed; possible remaining groundwater, surface water and sediment contamination is not thought to pose a risk to human health or the environment.[53]	09/18/1985	02/21/1990	06/29/1995	–	09/21/1995
WA1170023419	Naval Undersea Warfare Station (4 Areas)	Kitsap	Soil, sediments and groundwater contamination by PCBs, petroleum hydrocarbons, heavy metals and VOCs from base operations. Chemical contamination of local shellfish is no longer at levels that cause health concern but the area is closed to shellfishing because of sewage contamination from other sources.[54]	06/10/1986	10/04/1989	06/27/2000	–	–
WAD000641548	North Market Street	Spokane	Groundwater and soil contamination by petroleum compounds, PAHs and VOCs from former petroleum refiny.[55]	06/24/1988	03/30/1990	12/30/2002	–	–
WAD980511778	Northside Landfill	Spokane	Groundwater and domestic well contamination by organic solvents including PCE from former landfill practices. On-site sludge contains TCE and PCE. The aquifer below the site contains VOCs and is the sole drinking water source for the city of Spokane[56]	10/15/1984	06/10/1986	09/02/1993	–	–
WAD980833974	Northwest Transformer	Whatcom	Soil contaminated by PCBs has now been removed.[57]	10/15/1984	06/10/1986	03/31/1994	–	09/28/1999
WAD027315621	Northwest Transformer (South Harkness St)	Whatcom	Soil and buildings were contaminated by PCBs and heavy metals including arsenic, cadmium and lead.[58]	06/24/1988	02/21/1990	09/29/1994	–	09/26/1997
WAD980982557	Old Inland Pit	Spokane	Soil contains elevated levels of heavy metals from dumping of foundry waste in a former gravel pit. Groundwater contamination is at low levels and monitoring continues.[59]	06/10/1986	02/21/1990	02/01/1999	–	08/31/1999
WAD008957243	Oeser Co	Whatcom	Soil and groundwater contamination by creosote, PCP, carrier oil and dioxins from former and ongoing wood treatment operations.[60]	12/23/1996	09/25/1997	–	–	–
WA8680030931	Old Navy Dump/Manchester Lab (USEPA/NOAA)	Kitsap	Former US Navy site. Firefighting training contaminated soil with dioxins and petroleum hydrocarbons. Hydraulic erosion of a landfill area contaminated sediments and shellfish in Clam Bay with PCBs, copper, lead and zinc. Seeps from the landfill contained elevated levels of copper, nickel, zinc and PCBs.[61][62]	01/18/1994	05/31/1994	09/30/2002	–	–
WAD009249210	Pacific Car & Foundry Co.	King	Soil was contaminated by heavy metals, PAHs and PCBs from former manufacturing facility. Groundwater contamination by heavy metals, petroleum products and solvents. Around 37,000 people obtain drinking water from wells within three miles of the site.[63]	06/24/1988	02/21/1990	08/05/1996	–	–
WAD009248287	Pacific Sound Resources	King	Soil and groundwater contamination by PCP, PAHs and heavy metals from former wood treatment operations. Marine sediment contamination, primarily by PAHs, has contaminated seafood.[64]	05/10/1993	05/31/1994	09/16/2005	–	–
WA0000026534	Palermo Well Field Ground Water Contamination	Thurston	Groundwater and surface water contaminated by PCE from a dry cleaning business and TCE from former and current Washington DOT facilities. Three contaminated municipal drinking water wells have been closed.[65]	12/23/1996	04/01/1997	02/22/2001	–	–
WAD991281874	Pasco Sanitary Landfill	Franklin	Groundwater contamination by VOCs, including TCE, toluene and xylene from former landfill practices.[66]	06/24/1988	02/21/1990	–	–	–
WAD120513957	Pesticide Lab (Yakima)	Yakima	A waste pipe and on-site septic tank that carried a risk of contaminating groundwater have been removed.[67]	12/30/1982	09/08/1983	09/30/1992	–	09/01/1993
WA4170090001	Port Hadlock Detachment (US Navy)	Jefferson	Shellfish next to a former landfill contain elevated levels of heavy metals and pesticides. Another possibly contaminated area was found not to pose a risk.[68]	06/23/1993	05/31/1994	09/29/1997	–	06/14/2005
WA2170023418	Puget Sound Naval Shipyard Complex	Kitsap	Soil, sediment and groundwater contamination by petroleum hydrocarbons, heavy metals, VOCs and PCBs. Groundwater flows into the Sinclair Inlet where it is a hazard to tribal fishermen, marine life and recreational users.[69]	05/10/1993	05/31/1994	08/22/2007	–	–
WAD980511745	Queen City Farms	King	Former landfill site. Groundwater, surface water and sludge contamination by VOCs (including TCE and DCE); residential wells contaminated by arsenic. Soil contamination by PCBs and metals. Groundwater contamination is currently contained on-site.[70]	09/08/1983	09/21/1984	09/09/1997	–	–
WAD980639215	Quendall Terminals	King	Soil and groundwater contamination by PAHs, benzene and creosote products from former creosote manufacturing plant. Contaminant release to Lake Washington is a concern and could affect wildlife, including chinook salmon, a federal threatened species.[71]	09/14/2005	04/19/2006	–	–	–
WAD980639462	Seattle Municipal Landfill (Kent Highlands)	King	Landfill gas contains VOCs including toluene, xylene, vinyl chloride, and TCE. Groundwater is contaminated with VOCs and heavy metals.[72][73][74]	06/24/1988	08/30/1990	09/07/1995	–	–
WAD980722789	Silver Mountain Mine	Okanogan	Soil and surface water contamination by arsenic and cyanide from former silver and gold mining. Cyanide has been neutralized, contaminated water removed and taillings consolidated and capped.[75]	10/15/1984	06/10/1986	09/28/1992	–	09/22/1997
WAD981767296	Spokane Junkyard/Associated Properties	Spokane	The junkyard contained asbestos, oil contaminated with PCBs, flammable materials and VOCs. Soil was contaminated with lead and PCBs.[76]	10/14/1992	05/31/1994	07/14/1997	–	09/23/1997
WAD980723506	Toftdahl Drums	Clark	Surface water, groundwater and soil were contaminated by heavy metals and PCBs from used drum cleaning facility.[77]	10/15/1984	06/10/1986	09/30/1986	–	12/23/1988
WAD980639256	Tulalip Landfill	Snohomish	Groundwater, wetlands and sloughs were contaminated with heavy metals including lead, copper, chromium and cadmium from former dumping of commercial, industrial and hospital waste. On-site leachate and surface water was contaminated by heavy metals, PCBs, and VOCs including toluene and xylene. Leachate, surface water and slough water was contaminated by multiply resistant pathogens.[78]	07/29/1991	04/25/1995	09/28/2000	–	09/18/2002
WAD988519708	Vancouver Water Station#1 Contamination	Clark	Groundwater contamination by PCE from an unknown source. Wells supply up to 20 million gallons of drinking water per day to Vancouver, Washington and Clark County, which is treated to remove PCE before supply.[79]	06/23/1993	05/31/1994	09/25/1998	–	–
WAD988475158	Vancouver Water Station#4 Contamination	Clark	Groundwater contamination by PCE, suspected to come from dry cleaning operations. Treatment facilities remove PCE from drinking water before supply.[80]	07/29/1991	10/14/1992	09/08/1999	–	–
WAD009487513	Western Processing Company, Inc.	King	Former industrial waste processing facility. Groundwater and sediment contamination by VOCs, phenols and heavy metals. Soil was contaminated by VOCs, PCBs, phenols and metals. VOCs and metals detected in surface water.[81]	12/30/1982	09/08/1983	12/23/1991	–	–
WAD009248295	Wyckoff Co./Eagle Harbor	Kitsap	Former wood treatment facility and shipyard. Soil, groundwater and seaps onto beaches contain elevated levels of PAHs, PCBs, dioxins and furans. Marine sediments contain PAHs, mercury (element), other metals and PCBs. There are also pools of liquid contaminants on the harbor bottom.[82]	09/18/1985	07/22/1987	–	–	–
WAD040187890	Yakima Plating Co.	Yakima	Groundwater contained low levels of heavy metals including copper, lead and zinc.[83]	06/24/1988	03/31/1989	09/30/1992	–	08/23/1994

See also

• List of Superfund sites in the United States
• List of environmental issues
• List of waste types
• TOXMAP

External links

• EPA list of proposed Superfund sites in Washington
• EPA list of Superfund sites in Washington
• EPA list of Superfund site construction completions in Washington
• EPA list of partially deleted Superfund sites in Washington
• EPA list of deleted Superfund sites in Washington

References

1. P.L. 96-510, 42 U.S.C. §§ 9601–9675), December 11, 1980.
2. "National Priorities List". United States Environmental Protection Agency. Retrieved 2010-05-01.
3. "Final NPL sites". EPA. Retrieved 2010-05-01.
4. "Construction Completions at NPL sites". EPA. Retrieved 2010-05-01.
5. "Partial deletions at NPL sites". EPA. Retrieved 2010-05-01.
6. "Deleted NPL sites". EPA. Retrieved 2010-05-01.
7. "ALCOA (Vancouver Smelter)". EPA. Retrieved 2010-05-01.
8. "American Crossarm & Conduit Co. site description". Retrieved 2009-12-21.
9. "American Crossarm & Conduit Co. NPL site narrative". Retrieved 2009-12-21.
10. "American Crossarm & Conduit Co. Superfund site progress profile". Retrieved 2009-12-21.
11. "American Lake Gardens/McChord Air Force Base site description". Retrieved 2009-12-19.
12. "American Lake Gardens/McChord Air Force Base NPL site narrative". Retrieved 2009-12-19.
13. "American Lake Gardens/McChord Air Force Base Superfund site progress profile". Retrieved 2009-12-19.
14. "Bangor Naval Submarine Base site description". Retrieved 2009-12-21.
15. "Bangor Naval Submarine Base NPL site narrative". Retrieved 2009-12-19.
16. "Bangor Naval Submarine Base Superfund site progress profile". Retrieved 2009-12-19.
17. "Bangor Ordnance Disposal (US Navy)". EPA. Retrieved 2010-05-01.
18. "Bonneville Power Admin Ross (USDOE)". EPA. Retrieved 2010-05-01.
19. "Boomsnub/Airco". EPA. Retrieved 2010-05-01.
20. "Centralia Municipal Landfill". EPA. Retrieved 2010-05-01.
21. "Colbert Landfill". EPA. Retrieved 2010-05-01.
22. "Commencement Bay, Near Shore/Tide Flats". EPA. Retrieved 2010-05-01.
23. "Commencement Bay, South Tacoma Channel". EPA. Retrieved 2010-05-01.
24. "Fairchild Air Force Base (4 Waste Areas)". EPA. Retrieved 2010-05-01.
25. "FMC Corp. (Yakima Pit)". EPA. Retrieved 2010-05-01.
26. "Fort Lewis (Landfill No. 5)". EPA. Retrieved 2010-05-01.
27. "Fort Lewis Logistics Center". EPA. Retrieved 2010-05-01.
28. "Frontier Hard Chrome, Inc.". EPA. Retrieved 2010-05-01.
29. "General Electric Co. (Spokane Shop)". EPA. Retrieved 2010-05-01.
30. "Greenacres Landfill". EPA. Retrieved 2010-05-01.
31. "Hamilton/Labree Roads Ground Water Contamination". EPA. Retrieved 2010-05-01.
32. "Hamilton Island Landfill (USA/COE)". EPA. Retrieved 2010-05-01.
33. "Hanford 100-Area (USDOE)". EPA. Retrieved 2010-05-01.
34. "Hanford 200-Area (USDOE)". EPA. Retrieved 2010-05-01.
35. "Hanford 300-Area (USDOE)". EPA. Retrieved 2010-05-01.
36. "Hanford-1100 Area (USDOE)". EPA. Retrieved 2010-05-01.
37. "Harbor Island". EPA. Retrieved 2010-05-01.
38. "Hidden Valley Landfill (Thun Field)". EPA. Retrieved 2010-05-01.
39. "Jackson Park Housing Complex (US Navy)". EPA. Retrieved 2010-05-01.
40. "Kaiser Aluminum Mead Works". EPA. Retrieved 2010-05-01.
41. "Lakewood Site". EPA. Retrieved 2010-05-01.
42. "Lockheed West Seattle site narrative". EPA. Retrieved 2010-05-03.
43. "Lockheed West Seattle site progress profile". EPA. Retrieved 2010-05-03.
44. "Lower Duwamish Waterway Site". EPA. Retrieved 2010-05-03.
45. "Lower Duwamish Waterway site progress profile". EPA. Retrieved 2010-05-03.
46. "Lower Duwamish Waterway Questions and Answers". EPA. Retrieved 2010-05-03.
47. "McChord Air Force Base (Wash Rack/Treat)". EPA. Retrieved 2010-05-01.
48. "Mica Landfill". EPA. Retrieved 2010-05-03.
49. "Midnite Mine". EPA. Retrieved 2010-05-03.
50. "Midway Landfill". EPA. Retrieved 2010-05-03.
51. "Moses Lake Wellfield Contamination". EPA. Retrieved 2010-05-03.
52. "Naval Air Station, Whidbey Island (Ault)". EPA. Retrieved 2010-05-01.
53. "Naval Air Station, Whidbey Island (Seaplane)". EPA. Retrieved 2010-05-01.
54. "Naval Undersea Warfare Station (4 Areas)". EPA.
55. "North Market Street". EPA. Retrieved 2010-05-03.
56. "Northside Landfill". EPA. Retrieved 2010-05-03.
57. "Northwest Transformer (Mission Pole)". EPA. Retrieved 2010-05-01.
58. "Northwest Transformer(South Harkness St". EPA. Retrieved 2010-05-01.
59. "Old Inland Pit". EPA. Retrieved 2010-05-01.
60. "Oeser Co". EPA. Retrieved 2010-05-03.
61. "Old Navy Dump/Manchester Lab (USEPA/NOAA)". EPA. Retrieved 2010-05-03.
62. "Old Navy Dump/Manchester Lab (USEPA/NOAA) Superfund site progress profile". Retrieved 2010-02-03.
63. "Pacific Car & Foundry Co.". EPA. Retrieved 2010-05-03.
64. "Pacific Sound Resources". EPA. Retrieved 2010-05-03.
65. "Palermo Well Field Ground Water Contamination". EPA. Retrieved 2010-05-03.
66. "Pasco Sanitary Landfill". EPA. Retrieved 2010-05-03.
67. "Pesticide Lab (Yakima)". EPA. Retrieved 2010-05-01.
68. "Port Hadlock Detachment (US Navy)". EPA. Retrieved 2010-05-01.
69. "Puget Sound Naval Shipyard". EPA. Retrieved 2010-05-03.
70. "Queen City Farms". EPA. Retrieved 2010-05-03.
71. "Quendall Terminals". EPA. Retrieved 2010-05-03.
72. "Seattle Municipal Landfill (Kent Highlands) site description". Retrieved 2009-12-21.
73. "Seattle Municipal Landfill (Kent Highlands) NPL site narrative". Retrieved 2009-12-21.
74. "Seattle Municipal Landfill (Kent Highlands) Superfund site progress profile". Retrieved 2009-12-21.
75. "Silver Mountain Mine". EPA. Retrieved 2010-05-01.
76. "Spokane Junkyard/Associated Properties]". EPA. Retrieved 2010-05-01.
77. "Toftdahl Drums". EPA. Retrieved 2010-05-01.
78. "Tulalip Landfill". EPA. Retrieved 2010-05-01.
79. "Vancouver Water Station #1 Contamination". EPA. Retrieved 2010-05-03.
80. "Vancouver Water Station #4 Contamination". EPA. Retrieved 2010-05-03.
81. "Western Processing Company, Inc.". EPA. Retrieved 2010-05-03.
82. "Wyckoff Co./Eagle Harbor". EPA. Retrieved 2010-05-03.
83. "Yakima Plating". EPA. Retrieved 2010-05-01.