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0 <br /> Sunland Gasoline September 21, 1999 <br /> 2085 Fremont Street, Stockton, California Page 2 <br /> Work Plan for the Site Characterization <br /> excavation activities. Figure 3 depicts the locations of the samples collected during the <br /> tank removal event on December 15, 1998 and the December 31, 1998 sampling event. <br /> ' 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 /> t 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 /> EPA 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 and <br /> ' fuel oxygenate contamination is present in the stockpiled soil and in the vicinity beneath <br /> the former UST's and dispenser locations. Lead was found in the soil samples collected <br /> from the vicinity beneath the former UST's and product piping locations, but at <br /> insignificant levels. <br /> ' 3.0 Scope of Work <br /> ' This scope of work was developed to characterize the nature and extent of the <br /> contamination associated with the unauthorized release that occurred as a result of fueling <br /> operations located on the subject property. <br /> ' The work plan provides for two (2) vesoil borings, one (1) of which will be <br /> completed to a depth of thirty feet (30'), and one will be completed to an approximate <br /> ' depth of fifty feet (50'), or the point at which groundwater is encountered. The shallow <br /> boring will be completed in the vicinity of Dispenser 3, and the deep boring will be located <br /> in the vicinity of soil sample TK2-S East, the area of highest known contamination (Figure <br /> ' 4). <br /> Soil samples will be collected at 5 foot intervals. Each sample will be screened with a field <br /> ' PID for the presence of hydrocarbon contaminates. A singe groundwater sample will be <br /> collected at the termination point of the boring which will be completed to the <br /> approximate depth of fifty feet (50'). Laboratory samples will be collected and sent to <br /> GeoAnalytical Laboratories, Inc., in Modesto, California, for analysis. <br /> r <br />