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c <br /> Subsurface Conditions /p,�.�l� <br /> Five borings were advanced at the locations shown on Figure 1. One boring, B-5 was not <br /> drilled due to proximity of overhead electrical power lines. The surface of the parcel 5 was <br /> covered with asphalt pavements and Parcel 6 with hard packed gravel. Soils underlying <br /> pavements consisted of artificial fill and native clayey silts, sandy silts and silty clay to <br /> depths of about 5-feet. Areas of artificial fill occurred near the former battery storage area, <br /> and in the vicinity of the ground penetrating radar anomalies at HA-4 and HA-5. Hand <br /> augering and excavation of HA-4 and HA-5 revealed fill consisting of concrete rubble with <br /> rebar,broken pavement and fill sand. <br /> Clayey silt containing sandy silt and silty sand strata occurred below the fill and generally <br /> below depths of about 5-feet. The silt contained caliche and was massive to crudely <br /> bedded. Boring B-2 revealed petroleum contaminated soil from depths of approximately <br /> 10-to 20-feet. The most heavily contaminated zone appeared to be localized at 15-feet. <br /> These contaminants were notobserved <br /> revealed a soil f pH 6 at odepths of SrinB-3 andB to 10-feet. <br /> Groundwater <br /> pH <br /> measurements at B-2 and B <br /> Groundwater was not encountered in any borehole. <br /> Chemical and Physical Analytical Methods <br /> Selected soil samples from the parcels were analyzed for Total Petroleum Hydrocarbons <br /> (TPH) as gasoline and diesel (TPHG,TPHD) using EPA Method 8015M, Benzene, <br /> rni- <br /> Toluene,Ethylbenzene and total Xylenes usingS2P0and Anhod 17 00, for volatile <br /> Metals. results are <br /> volatile organics using EPA Method 8240 and <br /> presented in Tables 1 and 2 below <br /> to t d for R- <br /> -vaand the lue using ical reports <br /> al-Trans Test 301. single soil <br /> samples will be collected an <br /> 'fable 1. Chemical Analytical Data-Organic Compounds <br /> Sample "l'1'I1G <br /> l'PIID Benzene Toluene Ethylben Xylene VO(:-all <br /> No. mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg <br /> g g <br /> * ND ND ND ND NA <br /> B-2-11.5 ND 4.5 570 300� 1,700 NA <br /> Np <br /> B-2-16.5 17,000 NA <br /> ND ND ND <br /> 8-2-21.5 1.3 ND NA <br /> 0.017 0.069 0.013 0.�6 ND <br /> B-3-11.5 NA ND ND ND ND ND <br /> B-4-11.5 NA NA <br /> Sample TRPH <br /> No. <br /> mg/kg NA NA NA NA <br /> 13-6-11.5 ND NA NA <br /> * - Laboratory reports that the hydrocarbon does not match the diesel standard <br /> ND-None Detected NA-Not Analyzed mg/kg - milligram per kilogram <br /> VOC-all -Analyses by 8240A and 8270A,all analytes reported. Ethylben - Ethylbenzene <br /> i <br /> Page 3 <br />