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• 3.4 Laboratory Analysis and Results <br /> A total of four soil samples and six groundwater samples were submitted to McCampbell <br /> Analytical Inc , an ELAP-certified laboratory located in Pacheco, California, for analysis The <br /> samples were analyzed for TPH-D under EPA method 8015 (modified), BTEX constituents <br /> under EPA method 8020, and for MTBE under EPA method 8260 <br /> TPH-D was encountered in the soil sample collected from soil boring PB-SB-3 at a concentration <br />' of 2 7 ppm No BTEX constituents or MTBE were detected in any of the soil samples collected <br /> from the soil borings Table 3 summarizes the laboratory analytical data Figure 5 depicts the <br /> soil sample analytical results <br /> TPH-D was detected in the groundwater samples collected from soil borings PB-SB-3, PB-SB-5 <br />' and PB-SB-6 at concentrations of 390 ppb, 50 ppb, and 77 ppb, respectively No BTEX <br /> constituents or MTBE were encountered in any of the groundwater samples collected from the <br />' soil borings Table 4 summarizes the laboratory analytical data Figure 6 depicts the <br /> groundwater sample analytical results <br /> 4.0 Conclusions <br />' Based on the field observations and laboratory analytical data presented in this report, Shaw <br /> concludes the following <br /> 1 <br /> • In general, native soil lithology consisted of a silty clay to the termination of the <br />' borings at a depth of 16 feet bsg <br /> • Groundwater was encountered in the soil borings at depths ranging from 11 feet to <br />' 14 feet bsg <br /> i <br /> • Laboratory analysis detected TPH-D in one of the four soil samples at a <br />' concentration of 2 7 ppm (PB-SB-3) No BTEX constituents or MTBE were <br /> encountered in any of the soil samples <br />' • Laboratory analysis detected TPH-D in three of the six grab groundwater samples <br /> at concentrations of 390 ppb (PB-GW-3), 50 ppb (PB-GW-5), and 77 ppb <br /> 1 <br />' CNCb111-20-0210 SFiARirlUS7102-0096 doc <br /> 4 <br /> 1 <br />