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TERRA VAC <br /> TABLE 4 <br /> Additional Site Investigation <br /> Summary of Soil Vapor and Groundwater <br /> Analytical Data <br /> Well Total .Purgable <br /> No. Depth Media Hydrocarbons benzene toluene ethyl benzene total xylenes <br /> Soil Vapor (ppb) (ppb) (ppb) (ppb) (ppb) <br /> GP8 5 Air <10* <0.050* 0.44 <0.050* <0.050* <br /> GPS 10 Air <10* <0.050* <0.050* <0.050* <0.050* <br /> GPS 15 Air <10* <0.050* 0.42 <0.050* <0.050* <br /> Groundwater <br /> GPI Water 24,000 740 210 460 380 <br /> GP2 Water 40,000 3,300 910 530 4400 <br /> GP3 Water 56,000 6,200 4600 2000 5700 <br /> GP413 Water 16,000 3,800 350 420 290 <br /> GP6 Water 14,000 4,300 130 <0.50* <0.50* <br /> Oxygenates j <br /> Well Depth Matrix Methanol Ethanol t=Butanol MtBE DIPE EtBE LAME <br /> No. (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) <br /> GPI Water <10* <2,500* <500* <10* <10* <10* <10* i <br /> GP2 Water <2.0* <12,500* <2,500* <50* <50* <50* <50* <br /> GP3 Water <20* <16,600* <3,330* <67* <67* <67* <67* <br /> GP413 Water <1.0* <6,250* <1,250* <25* <25* 45* <25* <br /> GP6 Water NA NA NA NA NA NA NA <br /> Notes: <br /> BOLD Onsite vadose zone hydrocarbon concentrations used in the GSIIRBCA Tier One and <br /> Two Assessments. <br /> * denotes analyte detection limit. Analyte was not detectable above the detection limit E <br /> MtBE Methyl t-Butyl Ether <br /> DIPE Di-isopropyl Ether <br /> EtBE Ethyl t-Butyl Ether <br /> tAME t-Amyl Methyl Ether <br /> I <br /> i <br /> i <br /> i <br /> Project 30-0212 c:lalton130-02121cap1rev51cap-rev5.doc <br /> July 15, 1998 ', <br />