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ITABLE B.2 <br /> • Laboratory Results (Groundwater/Hydropunch -August 1995) <br /> i <br />' Q T I X TPH-(: FEPH <br /> Detection 03 03 03 06 005 0 05-0 5 <br />' Sample I D Limits n/l ug/I µgA }tg/l mg/1 mg/1 <br /> 1432-11PI-8122/95 3 2 14 55 26 022 U 79 <br />' 1432-IiP2-8/22/95 04 1 3 ND 8 7 ND 0 57 <br /> (dusel) <br /> 1432-I IP3-8/22/95 (8) 260 Nil 84 36 1 0 024 <br />' — (diesel) <br /> Unit Conversions Analytical <br />' µg/l parts per billion(pp} BTEX—benzene toluene, ethyl benzene and xylene. <br /> mg/l parts per million(ppm) TPH-G�total petroleum hydrocarbons quantefiLd as gasoline <br /> I F P H total extractable,petroleum hydrocarbons quanteftad as diesel <br /> motor oil,and kerosene <br />' ND -none detected at or above,the reportad laboratory detection limits <br /> # detection limit raised due to gasoline interference <br /> Based on the results of the August, 1995, investigation, Condor recommended additional investigation be <br />' conducted to evaluate the extent of the hydrocarbon plume (reference Soil and Groundwater Investigation <br /> Report, prepared by Condor, dated September 26, 1995) Mr Ronald Rowe of the PHS/EHD verbally approved <br /> the proposal for additional investigation during a telephone conversation with Condor in mid-February, 1996 <br />'• On August 29 1996, five (jeoprobe borehOIcS (GP-1 through GP-5) were installed at the site (see the figurc <br /> attached to the back of Appendix B for borehole locations) Linda Turkette of the PHS/'hHD was on site to <br /> 1 observe the fieldwork Soil and groundwater samples were collected during the investigation for laboratory <br /> analyses 17he results of the Iaboratory analyses indicated that elevated concentrations of TPH-G, BTEX, and <br /> MTBE were detected at GP-4 The TEPH (motor oil range) concentrations detected in soil samples collected <br />' from GP-2, GP-3, and GP-4, are questionable and are likely to be associated with the natural organic content of <br /> the soil (i e , peat), which is known to produce false positive results (see Tables B 3 and B 4 on the next page) <br /> t <br /> • <br />