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10 INTRODUCTION <br /> ' On behalf of the San Joaquin Catholic Cemetery, Ramage Environmental has prepared this <br /> Environmental Site Investigation Report for submittal to the San Joaquin County Public Health <br /> Services Environmental Health Division (PHSIEHD) and the Central Valley Regional Water <br /> Quality Control Board (RWQCB) This report documents a sensitive receptor survey of the site <br /> vicinity, remedial confirmation sod and groundwater sampling, and quarterly groundwater <br /> monitoring of the on-site well network <br /> ' 1 1 Site Location and Description <br /> ' The subject property is an operating cemetery located on the northeast corner of Harding Way <br /> and Cemetery Lane in the city of Stockton (San Joaquin County), California (Figure 1) The <br /> project site is located on the east side of the mausoleum building (Figure 2) <br /> 1 2 Previous Work (Abridged) <br /> On November 17, 1989, one 500-gallon gasoline UST and one 1,000-gallon gasoline UST were <br /> removed from the site in response to a faded tank tightness test According to the inspector's <br /> report, a hole approximately 5-inches in diameter and numerous pin-sized holes were observed <br /> in the tank bottom Three soil samples collected from beneath the former USTs contained up to <br /> 4,200 milligrams per kilogram (mg/kg) of Total Petroleum Hydrocarbons (TPH)-as-Gasoline and <br /> 21 mg/kg of benzene These analytical results are summarized in Table 1 <br /> ' In August 1990, WaterWork Corp drilled four sod borings (SB-1, SB-2, SB-3 and SB-4) and <br /> installed one groundwater monitoring well (MW-1) The locations of these four borings and one <br /> well are shown on the attached Figure 3 Results of the soil and groundwater sampling <br /> indicated that groundwater had been impacted by gasoline hydrocarbons but that the majority of <br /> the hydrocarbon mass was concentrated in soil between 10 and 20 feet below ground surface <br /> (bgs) These soil sample results are also summarized in Table 1 <br /> Between May 1992 and May 1994, Resna installed four additional groundwater monitoring wells <br /> (MW-2, MW-3, MW-4, and MW-5) These well locations are shown on Figure 2 <br /> 3 <br />