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URS Greiner Woodward Clyde
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<br /> Ms. Carol Oz, R.E.H.S. Page 4
<br /> LOP/Site Mitigation Unit f
<br /> v San Joaquin County—Public Health Services
<br /> Environmental Health Division
<br /> y September 14, 2000
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<br /> Analytical Results
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<br /> IA total of three soil samples, one from each soil boring, were selected for analysis. Analytical results for the soil
<br /> sample collected from MW I at six feet bgs (MW1-6)were non-detect for benzene, toluene, ethylbenzene.TBA. j
<br /> DIPS,ETB,and TAME; however, concentrations of TPH-G were detected at 1.1 mg/kg, xylenes at 0.088 m,/k--,
<br /> and MTBE at 0.250 mg/kg. Soil sample MW2-6 was non-detect for TPH-G,BTEX,TBA, DIPE.ETB and AME,
<br /> but contained a concentration of MTBE at 0.017 mg/kg. Soil sample MW3-6 was non-detect for TPH-G, BTEX,
<br /> i' MTBE,TBA,DIPE,ETB and TAME. The analytical results for the soil samples collected from the soil borings
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<br /> are summarized in Table 1. A copy of the analytical reports is included as Attachment V.
<br /> A total of three groundwater samples were analyzed. The analytical results for the groundwater sample from MW 1
<br /> reported concentrations of TPH-G at 2000 pg/L,benzene at 20 gg/L,toluene at 8.2 gg/L,ethylbenzene at 19 gglL,
<br /> �. xylenes at 275 gg/L,EMTBE at'660"4g/L, and TAME at 2.9 gg/L. The groundwater sample from MW2 was non-
<br /> detect for TPH-G, TBA,DIPE;ETB, TAME, toluene and ethylbenzene, but reported concentrations of benzene
<br /> at 0.9 gg/L, xylenes at 2.2 gg/L and MTBE at 3Tgg/L. Groundwater sample MW3 was non-detect for TPH-G.
<br /> BTEX,TBA,DIPE,ETB and TAME,but had a concentration of MTBE at 3.5 gg/L. The results are summarized
<br /> in Table 2 and a copy of the analytical report is included as Attachment V.
<br /> CONCLUSIONS tt
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<br /> On June 22 and 28, 2000, URSGWC drilled and sampled three soil borings at the California Highway Patrol
<br /> (CHP) facility located at 385 West Grantline Road in.Tracy, California. Soil and groundwater samples were
<br /> collected during drilling and submitted for laboratory analysis. The analytical results for the soil samples reported i
<br /> concentrations of TPH-G, xylenes and MTBE. The groundwater samples reported concentrations of TPH-G,
<br /> benzene, toluene, ethylbenzene, xylenes, MTBE and TAME. Currently, one additional round of groundwater
<br /> sampling is scheduled for the Site.
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<br /> 11URS_SACIIWPROCESS114214102_TRACY\TRACY REPORT-2.DOC
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