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0 i 1 <br /> 2.1 SITE DESCRIPTION <br /> This site, along with Site 2, has been identified by PHS/EHD as "Site Code 1282-124" Both sites ' <br /> are located in the central portion of the Port of Stockton complex(Figure 1) Site 2 is located about <br /> 30 feet north of Port Road G, and about 100 feet west of Port Road 13 (Figure 1) Site 3 is <br /> approximately 750 feet west of Site 2 and is located about 50 feet north of Port Road G and about <br /> 300 feet west of Port Road 14 (Figure 1) Results of the uutial subsurface investigation showed that , <br /> no PHCs remained in soils or groundwater at Site No 2 As a consequence, PHS/EHD determined <br /> that no further investigation was required at Site 2 Following is a description of the tanks, as well <br /> as excavation and sampling activities at Site 3, which is the subject of this investigation ' <br /> Site 3 had two 12,000-gallon tanks(Figure 2), identified on a PHS/EHD inspection report as Tank ' <br /> #1 and Tank#4,both of which contained unleaded gasoline The tanks were removed on February <br /> 16, 1988 by Stockton Service Station Equipment Co , Inc (SSSE) No information is available as <br /> to the age or condition of the tanks, or whether any associated product piping was removed The ' <br /> inspection report includes a sketch which shows two "pumps" located south of the tanks, <br /> presumably dispensers for the two tanks Approximately 180 cubic yards of soil were excavated <br /> with the tanks to a depth of about 11 feet bgs Subsequent to the removal of the tanks, the area ' <br /> over the former tanks and excavation was paved with concrete <br /> 2.2 SUMMARY OF PREVIOUS SITE CHARACTERIZATION WORK <br /> 1 <br /> 2.2.1 Tank Removal <br /> A total of four soil samples were collected by California Water Labs (CWL) during the removal of <br /> the tanks, one sample from beneath the north and south ends of each of the two tanks Although ' <br /> the exact depths of the samples are not listed, the PHS/EHD inspection report states the samples <br /> were collected"approximately 2 feet below the bottom of the tanks,"which would place them about <br /> 13 feet bgs No groundwater was encountered during excavation or sampling Discolored gray soil ' <br /> and strong petroleum product odor were detected at the southern end of both tanks Minor product <br /> odor was detected at the north end of Tank#1,while no odor was detected at the north end of Tank <br /> #4 <br /> Four additional soil samples were collected by CWL on March 15, 1988 These samples were ' <br /> collected from the same locations as during the tank pulls, but from a depth of 16 feet bgs A <br /> review of the PHS/EHD inspection report indicates that the inspector found "grey soil observed on <br /> all samples with petroleum-like odor" The report also notes that no groundwater was encountered ' <br /> LUdduwvvM 2 PHILIP P. Ross, RG. ' <br />