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3. RESULTS
<br /> • 3.1 Soil
<br /> During this investigation, a total of 20 soil samples were analyzed for TPHd and TPHg The
<br /> analytical results are presented in Table 1, and Figures 3, 5, and 6 A list of samples
<br /> ' submitted to the laboratories and their results are presented on Table 1 and Figure 3
<br /> Fourteen of these samples were non-detect for TPHd and TPHg, whereas five samples
<br /> contained TPHd and four contained TPHg
<br /> The sample from boring HA-2 collected at a depth of 28 ft bgs (HA-2-28) exhibited a TPHd
<br /> concentration of 330 milligrams per kilogram (mg/kg) Soil samples from boring HA-8
<br /> ' collected from depths of 10 and 20 ft bgs contained TPHd concentrations of 490 and 690
<br /> mg/kg, respectively The soil sample collected from boring HA-9 at a depth of 25 ft bgs
<br /> contained a TPHd concentration of 1,500 mg/kg TPHd was detected in a soil sample from
<br /> ' the tank excavation area (TANK-EX) at a depth of 5 ft bgs at a concentration of 29 mg/kg,
<br /> whereas the 10-foot sample was non-detect for TPHd and TPHg
<br /> TPHg was detected in samples from boring HA-8 at depths of 10, 20, and 30 ft bgs at
<br /> concentrations of 3 3, 37, and 0 75 mg/kg, respectively A soil sample from HA-9 at a depth
<br /> of 25 ft bgs contained a TPHg concentration of 660 mg/kg (Table 1)
<br /> During previous investigations, a total of 30 soil samples were analyzed for TPHd, TPHg,
<br /> and benzene, toluene, xylenes, and ethylbenzene (BTEX) Selected samples were also
<br /> analyzed for fuel oxygenates and lead Nineteen of these samples were non-detect for TPHd,
<br /> TPHg, BTEX, and fuel oxygenates, whereas eleven samples contained TPHd, nine contained
<br /> TPHg, and two contained BTEX constituents The TPHd, TPHg, and BTEX detects were
<br /> reported at MW-2, MW-3, MW-4, SB-1, and SB-2
<br /> 3.2 Groundwater
<br /> ' During this investigation, a total of seven groundwater hydropunch samples were analyzed for
<br /> TPHg and TPHd The analytical results are presented in Table 2 and Figure 4 The
<br /> groundwater sample from HA-2 contained a TPHd concentration of 7,500 ug/L No other
<br /> sample had detectable concentrations of TPHg or TPHd
<br /> During previous investigations, a total of 12 groundwater hydropunch or grab samples were
<br /> ' analyzed for TPHd, TPHg, and BTEX Selected samples were also analyzed for fuel
<br /> oxygenates and lead Six of these samples were non-detect for TPHd, TPHg, BTEX, and fuel
<br /> oxygenates, whereas two samples contained TPHd (SB-2 and SB-4), three samples contained
<br /> ' TPHg (SB-1 through SB-3), and two samples contained a trace amount of benzene (both from
<br /> SB-12)
<br /> During the quarterly groundwater sampling event in June 2002, groundwater samples were
<br /> collected from monitoring wells MW-1, and MW-3 through MW-6 Monitoring well MW-2
<br /> was not sampled due to the presence of free product Groundwater samples were analyzed for
<br /> ' TPHg, TPHd, and BTEX Groundwater samples from monitoring wells MW-3 and MW-4
<br /> had concentrations of TPHd at 67 and 120 ug/L, respectively MW-1, MW-5, and MW-6
<br /> were non-detect for all analytes
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