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!7 <br /> d <br />' Sunland Gasoline <br /> ' 2085 East Fremont Street <br /> Stockton, California <br /> ' .T Findings <br /> o <br /> Report s <br /> P b' <br /> Site Characterization <br /> ' 1.0 Project Identification <br /> On December 15, 1998, Sunland Gasoline had two (2) underground storage tanks <br /> ' (UST's) removed by Advanced GeoEnvironmental, Inc. Petroleum hydrocarbon, volatile <br /> aromatics, and oxygenate contamination was encountered in the shallow subsurface <br /> ' located in the vicinity of the former UST, product piping, and dispenser locations. The <br /> purpose of this investigation was to characterize the nature and extent of the contaminated <br /> media, and to determine the risk to human health or the environment posed by the subject <br /> ' site. <br /> lie 2.0 Site Location and History <br /> Sunland Gasoline is located in a commercial area in the city of Stockton, an incorporated <br /> ' area of San Joaquin County, California (Figures 1 and 2). The subject parcel of land is <br /> located in the central portion of Section 32, Township 1 North, Range 6 East, Mount <br /> Diablo Base and Meridian. The San Joaquin County Assessor's Office identifies the <br /> ' property with a physical location of 2085 East Fremont Street, Stockton, California. <br /> On December 15, 1998, two (2) 10,000•-gallon gasoline UST's and associated product <br /> piping were removed from this site. Upon removal of the UST's, soil samples were <br /> collected to determine the presence or absence of petroleum hydrocarbons, Benzene, <br /> Toluene, Ethyl Benzene, Xylene (BTEX), fuel oxygenates including di-isopropyl ether <br /> (DIPE), ethyl tertiary butyl ether (ETBE), tertiary amyl methyl ether (TAME), tertiary- <br /> butyl alcohol (TBA), and methyl tertiary butyl ether (MTBE), and lead. A total of fifteen <br /> ' (15) soil samples were collected from this site under the direction of the San Joaquin <br /> County Public Health Services-Environmental Health Division (PHS-EHD). <br /> f' On December 15, 1998, a total of seven (7) soil samples were collected from beneath the <br /> former UST locations and from the stockpiled soil, by a representative of Alpha Analytical <br /> Laboratories, Inc. (AAL). Four (4) soil samples were collected beneath the north and <br /> ' south ends of UST No. 1 and UST No. 2 at depths of approximately 16 feet below surface <br /> . grade. Three soil samples were collected from the stockpiled soil removed during <br /> ,1 <br />