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€ 25 October 1997 rc ,n e S a <br /> ' AGE-NC Project No.97 0361 <br /> Page 5 of 6 <br /> ' + ` 4:2. - ANALYTICAL,RF- <br /> ;CAESULTS'OSOIL SAMPLES,-'. <br /> TpH-g aril vola#ile.aromatic compounds (BTE&X}, TBA,DIPE,:ETBE, TAIVIE,MTBE and-other' <br /> . . h <br /> R volatile organic compound analytes.were not detected,in'the soil samples. r :' <br /> Analytical results of soil. samples are summarized,o>`i Table'1` Analytical Result of Sorl <br /> Samples/EPA 501518.020 and Table 2 Analytical Resultof Soil.Samples/EPA 82r0 The laboratory <br /> reports' (MAI Laboratory.ID, 0883 through-80885), QA/QC:report a'd.chairi-of custody, are r <br /> Appendix B. - .4. ` <br /> 4 3. :. ANALYTICAL RESULTS-.OF THE GROUND WATER SAMPLES <br /> MTBE was detected at <br /> 5.5 micrograms per lrter;µg/L (parts per billion ppb) rn the;,Iwater sample- ' <br /> _ 'collected from.35 feet bsg,:but.was:not detected in the sample-from.20 feet bsg:NThe'MTBE at 35.;;�- <br /> feet bsg was confiimed.At the reporting.limit of 5:O ppb:by analysis by EPA'method 8260:No:other <br />,may samples contained MTBE 4 , <br /> - <br /> t TPH-g;BTE&X, TBA;DIPS, ETBE;TAME; and other-volatzle organic compound analytes were <br /> not detected in either grab water samples.Analytical results of the.Water,sample are'-summarized bnn. - <br /> k. <br /> Table 3 Analytical Resylt.of Grab"Ground'Water Samples/EPA 8015/8020-and Table 4,- Grab t <br /> Ground Water Sainples/EPA 8260-The laboratory ieport-(Iv1AI,L-ab-ID:-riumber 84886=and 80887), . <br /> } QA/QC report,and chain-of.custody are in:Appendix.B.* <br /> �, <br /> _ 0. ' SUMMARY AND'CONCLUSIONS <br /> � ', _ R as:' �,. - •F-' -"' _; --•-. . � A, `'-:moi 7-••, s �- <br /> The following con' lu'Sions were drawn from the results of this investigation " <br />? Hydrocarbon-impacted soil was"not detected ktlie.level of the bottom the former UST ont'_ <br /> the s2#e-or at a depth of'15•feet bsg;which is below the'.Ievel of.the formeflUST'excavation <br /> Soil:in contact with first.ground water at the 'site did not contain TPH-g or VOCs <br /> TPH-g or VOCs were xiot-present in the grab water sample collected from the static first <br /> -ground water encountered at-the MTBE was-detected at a'ver y.low concentration in the <br /> F <br /> water sample collected-from a'35 feet bsg. MTBE at S:S,ppb to 5:0 ppb is well below theme - <br /> t <br /> - Central- Valley- Regional Water Quality _Control Board:.(CVRWQCB) and_California' fl <br /> = Department-of Health Services(.DHS)recommended�35'ppb action level. <br /> r. <br /> Based on the lack of'petroleum hydrocarbon impact to groundwater at`tlie site and the low <br /> w concentrations of,hydrocar'bons in.soil adjacerifto.the former UST excavatik-AGE does not <br /> JE �i�-'r. -y :'•� �` i•' ' <br /> r ''` ' ". '• -' _Advanced GeoEnviroumental, <br /> ry If <br /> „['*... .•y7,,...._._,.J r _.F. ..� ._ -r- — -' . .:,% <br />