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File No 20-3941-01 Ell kn KLEINFELDER <br /> August 20, 1996 <br /> 6.2 SOIL ASSESSMENT <br /> In general, concentrations of the hydrocarbons analyzed in the 62 samples tested ranged as <br /> follows <br /> • iPH-G [ND (<I mg/kg) to 820 mg/kg] <br /> ' Benzene [ND (<0 0050 mg/kg) to (<1 25 mg/kg)] <br /> • Toluene [ND (<0 0050 mg/kg)to (<1 25 mg/kg)] <br /> • Ethylbenzene [ND (<0 0050 mg/kg) to 1 8 mg/kg] <br /> • Total Xylenes [ND (<0 0050 mg/kg) to 12 mg/kg] <br /> • UHCs [ND (<1 0 mg/kg) to 3 1 mg/kg] <br /> • TPH-K [ND (<1 0 mg/kg)to ND (<100 mg/kg)] <br /> TPH-D [ND(<1 0 mg/kg) to ND (<100 mg/kg)] <br /> • TPH-LO [ND (<2 0 mg/kg) to (230 mg/kg] <br /> ' 0 CPH-IP4 [ND (<1 0 mg/kg) to ND (<100 mg/kg)] <br /> • TPH-IP5 [ND (<1 0 mg/kg) to ND (<100 mg/kg)] <br /> • TPH-Mtn Spirits [760 mg/kg] <br /> • MTBE [ND (<0 050 mg/kg) to 0 06 mg/kg] <br /> • Total Pb [ND (<2 5 rng/kg) to 80 mg/kg] <br /> ' More specifically, the results can be detailed as follows <br /> 1 Boring B-I was advanced at the ARCO Station at 1305 Escalon Avenue The soil sample <br /> from a depth of 2 feet contained low levels of "lubricating oil" which may be <br /> representative of asphalt or asphalt leachate in the soil sample No detectable <br /> 1 hydrocarbons were present in the sample obtained from 5 feet Kleinfelder recommends <br /> no further investigation or clean-up as a result of the hydrocarbons encountered in their <br /> borings <br /> 2 Boring B-2 was advanced near a trailer house at the northwest corner of Paul's Indian <br /> Store The soil sample obtained from a depth of 5 feet contained low to trace levels of <br /> Methyl Tertiary Butyl Ether (MTBE) and unidentified extractable hydrocarbons (UEH) <br /> MTBE is used almost exclusively in gasoline (see Appendix F) Therefore, these <br /> contaminants are likely due to surface spillage Kleinfelder recommends no further <br /> ' investigation or clean-up as a results of these trace levels <br /> 3 Boring B-3 was advanced near the southeast corner of the Escalon R-V parcel (north of the <br /> shop building) The sample obtained from a depth of 2 feet contained a trace level of <br /> UEH The UEH may be a results of asphalt or asphalt leachate Additionally, no <br /> detectable hydrocarbons were present in the sample obtained from a depth of 5 feet <br /> Kleinfelder recommends no further investigation or clean-up as a result of the <br /> hydrocarbons encountered in their borings <br /> ' 20-3941-01 E011MR960163 Page 16 of 21 01996, Kleinfelder Inc <br />