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Stockton City Taxi Co. my <br /> 2085 Fremont Street, Stockton, California January 6, 2004 <br /> Receptor Survey page; 2 <br /> during excavation activities . Figure 3 depicts the locations of the samples collected <br /> during the tank removal event on December 15 , 1998 and the December 31 , 1998 <br /> sampling event. <br /> l On December 31 , 1998 a total of eight (8) soil samples were collected from beneath the <br /> former product piping and dispenser locations by a representative of Precision Enviro- <br /> Tech Analytical Laboratory (Figure 3). <br /> The soil samples submitted for analysis from the vicinity beneath the former UST ' s, <br /> product piping, and dispenser locations and from the stockpiled soil were analyzed by <br /> lEPA method 8015NV5030 for gasoline petroleum hydrocarbons, EPA method 8020 for <br /> BTEX, EPA method 8260 for fuel oxygenates (MTBE, TAME, DIPE, ETBE, and TBA), <br /> and EPA method 6010 for total lead. <br /> The results from these samples indicated that petroleum hydrocarbon contamination is <br /> present in the vicinity beneath the former UST' s, product piping, and dispenser locations. <br /> Petroleum hydrocarbon contamination was also detected in the stockpiled soil. BTEX <br /> and fuel oxygenate contamination is present in the stockpiled soil and in the vicinity <br /> beneath the former UST' s and dispenser locations. Lead was found in the soil samples <br /> collected from the vicinity beneath the former UST' s and product piping locations, but at <br /> insignificant levels. <br /> In July, 2003 , WHF, Inc. in conjunction with Frontier Drilling, installed four groundwater <br /> monitoring wells to identify and monitor the contaminates in the groundwater underlying <br /> this site. <br /> 3. 0 Scope of Work <br /> [ WHF conducted interviews coupled with a physical site inspection of the subject property <br /> f to locate and identify any receptors within the area identified in Figures 1 through 4. A <br /> receptor is defined as entities such as streams, rivers, city wells, domestic wells, etc, that <br /> would receive contamination and yield potential risk to human health. It is the purpose of <br /> this study to address if groundwater contamination will reach these receptors and pose a <br /> risk to public health. <br /> 3. I Groundwater Conditions <br /> The current groundwater level at this site, according to the Department of Water <br /> Resources, is approximately fifty-two to fifty-five feet below ground level. The <br /> k site specific groundwater gradient is unknown at this point. WHF, hie. is in the <br /> process of completing a Quarterly Groundwater Monitoring Report that will <br />