3.0 Affected Environment - Knik Arm Bridge and Toll Authority

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Knik Arm Crossing DraftFinal EIS Affected Environment acquisition, however, would result in the landowner assuming responsibility for any contaminated soil encountered in the future. Additionally, management of any contaminated soil encountered during construction through this site would be the responsibility of the proposed KAC project proponent (HDR 2004). This property has been assigned a highimpact rating because contamination has been documented on this property and because the site would be crossed by the proposed Erickson Alternative. This site was assessed as having a high-impact risk to the project because of known fuel contamination associated with the site and because the proposed ROW would affect a large area of this site. Phase 2 In Phase 2 of the proposed projected, the area that would be crossed by the Ingra-Gambell Couplet is one of the original industrial areas in Anchorage. Implementation of the proposed Ingra-Gambell Couplet could be affected by the following medium- and high-impact sites described below. Site 5 – Alaskan Real Estate Parking Lot – Medium Impact Site 5 is located at 717 East 4th Avenue (see Figure 4.21). Soil contaminated with tetrachloroethylene (PCE) and diesel range organics (DRO) was excavated and thermally treated in 2004. PCE-contaminated soil and ground water remains on site, and studies are ongoing. This site has been assigned a medium-impact rating because undefined soil and ground water contamination remains and because the property is in the presumed upgradient direction of the proposed controlled-access ROW (ADEC 2005a). Site 14 – Lefever Property – 4th Avenue and Ingra Street – High Impact Site 14 is located at 901 4th Avenue (see Figure 4.21). Ten USTs were removed from this property in 1989. Soil and ground water contamination has been documented, and the contaminated ground water plume extends off site. This site would be upgradient of the proposed controlled-access ROW and has been assigned a high-impact rating because the property is known to be contaminated (ADEC 2005b). Within the Ship Creek area, the six sites discussed below were given high-site hazard ratings because of contamination resulting from PCBs, fuels, heavy metals, solvents, and various other chemicals. It is unlikely that the proposed Degan Alternative or the Erickson Alternative would, however, directly affect these sites because the proposed elevated viaduct structures would span the sites and the Ship Creek area. In all six cases, it is unlikely that ROW would be acquired. Land within the Anchorage Terminal Reserve needed for viaduct support structure piers would not likely require controlled-access ROW acquisition (i.e., easement, lease). Viaduct support piers should, however, be sited to avoid direct impact to any of the sites identified. If there were no direct impacts during construction (i.e., excavation of soils) or acquisition of any of these properties for controlled-access ROW purposes, then the risk to the project search corridors would be low for all six sites. All six sites would require a PSI, and the risk to the project search corridors would increase to high if controlled-access ROW were required or excavation were completed in the area of the six sites. All six sites are shown on Figure 4.21. 3-128 12/18/07
Knik Arm Crossing DraftFinal EIS Affected Environment Site 6 – Dean’s Auto Salvage Site 6 is located at 720 East Whitney Road and appears on the UST database as McDonald Industries. Currently, the property is used for an auto salvage yard. Dean’s Auto Salvage is a RCRA Small Quantity Generator with 12 reported violations. The ADEC UST database shows that the site formerly had three USTs, but all are listed as permanently out of use. Acquisition of this parcel for controlled-access ROW purposes or impacts on this site that might require excavation of potentially contaminated soil would result in an impact risk rating of high because of the site’s use as a salvage yard and the recommendation for a PSI at the site (ADEC 2005a; ADEC 2005b). Site 9 – Anchorage ML&P #1 Site 9 is located at 821 East 1st Avenue and was the site of a 235,000-gallon diesel spill during the 1964 earthquake. Soils and ground water were contaminated with diesel fuel, and subsequent releases occurred on the site including PCBs from electrical equipment. Free product recovery and ground water monitoring is ongoing (ADEC 2005a). Site 11 – Alaska Railroad Yard Switches The proposed Ingra-Gambell Viaduct would cross a portion of the Alaska Railroad rail yard that is part of the Anchorage Terminal Reserve, a Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA 30 ) site occupying approximately 313 acres. The area has been used for fueling, painting, steam cleaning, loading freight onto rail cars, and maintenance and repair work on locomotives and railroad cars (USEPA 2005b). A 1996 RCRA Facility Assessment of the property identified 73 solid waste management units (SWMUs). USEPA and the ARRC, under an Administrative Order on Consent, are conducting a remedial investigation of the Anchorage Terminal Reserve property. This generalized site has been assigned a high-impact rating because of past and ongoing industrial uses and because commercial quantities of petroleum products have been stored on site and releases have been documented (ADEC 2005a). Site 13 – Craig Taylor Equipment Company Site 13 is located at 733 East Whitney Road. Four underground storage tanks were removed from this property in 1989. Low levels of contamination were found and contaminated soil was landspread. ADEC closed the site in 1993 (ADEC 2005b). Site 44 – Arctic Cooperage Site 44 is located at 932 Whitney Road. In 1998, oil-stained soil, paint pools, and drums with unknown contents were documented at the property. The site was an alleged hazardous dumpsite for oil refining sludge and a barrel reconditioning operation from 1977 to 1988. Remediation and studies are ongoing, and a diesel UST was removed in 1996 (ADEC 2005a). 30 Commonly known as Superfund, CERCLA was enacted by Congress on December 11, 1980. This law created a tax on the chemical and petroleum industries and provided broad federal authority to respond directly to releases or threatened releases of hazardous substances that may endanger public health or the environment. 12/18/07 3-129
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3.0 Affected Environment - Knik Arm Bridge and Toll Authority

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