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kn KLEINFELDER <br /> t <br /> 5 RESULTS AND FINDINGS <br /> ' The following results includes data gathered during the monitoring well installation/soil <br /> sampling operation, the monitoring well development and sampling activities, and the <br /> ' laboratory analyses of soil and ground water samples. <br /> ' 5.1 SOIL CHEMISTRY <br /> 1 Table 3 summarizes analytical results for the soil samples. These results indicate that TPH <br /> and BTEX are not present in soil samples collected from MW-1, MW-2, and the two <br /> shallow excavations (Tank Excavation A & B) The soil sample collected at 4 to 4 5 feet in <br /> ' MW-3 contained 3 1 mg/kg of ethyl benzene, 10.4 mg/kg of xylene, and 1,000 mg/kg of <br /> TPH as gasoline Analytical results of the soil samples collected 2 to 2.5 feet in MW-3 <br /> ' indicated BTEX compounds and TPH were not present. Since contamination is present in <br /> the soil sample collected at 4 to 4 5 foot and not at 2 to 2 5 foot in MW-3, it appears that <br /> the soil contamination may be due to a source below 2 5 feet, e g piping or a pipe <br /> connection. <br /> 1 Analytical results indicate that inorganic lead was present at concentrations from 46 to 73 <br /> mg/kg in soil samples collected from the monitoring wells and the shallow excavations <br /> ' The concentration of lead detected in the soil samples from the subject site appear to be <br /> fairly consistent. Lead in the background boring (MW-1) averaged 51 mg/kg, very close to <br /> ' the site average of 57 6. It appears that lead contamination has not impacted the site. <br /> ' <br /> 5.2 GROUND WATER CHEMISTRY <br /> ' Table 4 presents a summary of the analytical data. These analytical results indicate that <br /> BTEX and TPH are not present in ground water samples collected from MW-1 and MW-2. <br /> Analytical results of a ground water sample collected from MW-3 indicated 6 3 ug/l of <br /> ' xylene was present and the concentration of TPH as gasoline was 430 ug/1 <br /> ' Ethylene dibromide was not detected in ground water samples from MW-2, but a <br /> concentrations of 012 ug/1 was detected in the ground water sample from MW-3 This <br /> analyses was not performed on the ground water sample from MW-1. <br /> ' 145-88-2013 7 <br />