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Well Abandonment and Soil and Groundwater Investigation Work Plan US Can-Welty Road September 2007 container manufacturer,Hunter Container Company,and a can manufacturer,US Can Company. Hunter Container Company still owns the property. Historical site records indicate the following environmental concerns associated with former Hunter Container Company and US Can Company operations(Radian, 1997): • Former wastelbum pit removal area; • Gasoline storage tanks removal area; • Septic tank; • Former chemical storage shed area; • Former wash water discharge area; • Former aboveground storage tank;and • Condensate outlet-pipe location. Information regarding these environmental concerns is limited,as historical records are scarce. Historical records indicate that one 1,000-gallon gasoline-containing underground storage tank(UST)that was removed from the site in 1988 (Figures 2 and 3); the exact location of the UST in not known. According to historical aerial photos, it appears the former waste/bum pit area associated with former Hunter Container Company operations is now located underneath the western end of the existing site building, formerly the Hunter Container Company can fabrication plant(Figure 2). An accidental surface release of waste cleaning solutions was reported from a condensate outlet-pipe located on the northeastern side of the fabrication plant(in the vicinity of MW-1). At the request of Hunter Container Company and US Can Company, investigations were performed by their consultants to assess the possibility that these environmental concerns impacted the property. In addition,Chevron Pipe Line Company evaluated whether trichloroethylene(TCE)in waste cleaning solutions released from the condensate outlet-pipe during former Hunter Container Company operations had impacted groundwater. On behalf of CEMC,Geomatrix and then SAIC have investigated the presence and extent of residual petroleum in the subsurface near the OVP and TAOC pipelines. Previous investigations are described in more detail in Section 2.5. Off-site,Western Farm Service(WFS)is located directly north of the site across Highway 33. WFS has stored and distributed bulk liquid and dry fertilizers on its facility since 1969. Historical records indicate this site contained three USTs: a 10,000-gallon UST was used for storage of diesel,and 5,000-and 10,000-gallon USTs were used for storage of gasoline. Historical records are limited,and exact tank locations are not known. The USTs were removed in 1987 and approximate locations of the former USTs are illustrated on Figures 2 and 3. In addition,a former Union Oil Service Station that operated from 1972 to the mid 1980s is located at the northeast corner of the intersection of Welty Road and Highway 33. No historical records are available for this site; therefore,the location and status of the USTs are unknown. The former station and pump island locations are illustrated on Figures 2 and 3. 2.2 HISTORICAL AND EXISTING PIPELINES The OVP transported heated crude oil from Bakersfield to Richmond,California from the early 1900s to the 1960s. In addition,Bunker C fuel oil was sometimes transported from Richmond to Tracy, California. The OVP was located along the northeastern side of the site and parallel to the existing Union Pacific Rail Road(UPRR)and Highway 33. The former TAOC pipeline was also present between the site and Highway 33. The TAOC pipeline was used to transport heated crude oil from the Central Valley to the San Francisco Bay Area and operated from the early 1900s until it was decommissioned in the 1970s. The TAOC pipeline was acquired by Chevron through its merger with Texaco. 2 SAIL From Scrence to Solutions