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HE MHI �Addrinor A '.d and(rnr.nnd,.,l,.ln,rarp nnuo <br /> I{.renyr K Ile lin.I+luiir.r tiL.;Asn S4 <br /> Carr}tutclt aler hrtvstigalion 1R,Tort, prepared by Condor, dated September 26, 1995). Mr. Ronald <br /> Rowe of the PIIS/EI ID verbally approved the proposal for additional investigation during, atelephone <br /> conversation .With Condor in mid-Febrttarl', 1996. <br /> On ALIQUM 29. 1996, ftve (5) Geoprohe boreholes (OW-I through GP-5) were installed at the <br /> site (Figure 3, Appendix A). Linda "I'LActte of' the Pl iS/I-1[D was on site to observe the fieldwork. <br /> Soil and groundwater samples were collected during, the investigation for laboratory analyses. The <br />' results of the laboratory analyses indicated that elevated concentrations of TPH-G, BTEX, and MTBE <br /> were detected in soil and groundwater at GP-4, The TEPH (motor oil range) concentrations detected <br />' in soil samples collected from GP-2, GP-3, and GP-4, are questionable and are likely to be associated <br /> ,vitli the natural organic content of the soil (i.e.. peat), which is known to produce false positive results <br /> (see Tables 2.3 and 2.4, below). <br /> TABLE 2.3 <br /> Laborator• Results (Soil/G cop robe) <br /> B T E N AITRE TPI1-c TFP1l <br /> Detection 5,U 5.0 5.0 5.0 5.0 I-0 1.0-141 <br /> Sample I.D.Limits: µg/kg jig/kg pg/kg pg/kg µg/kg mg/kg mg,/kg <br /> 1432-6111-9 NU ND N1) ND ND ND ND <br /> 14324,112-11 ND ND ND ND ND ND 45 (motor oil ranee') <br />' 1432-GP-3-10 NY) ND til) ND 14 N1) 39 (motor oil range?) <br /> 1432-6114-5 920 1,500 N1)(100) ND(100) 14.000 28 55 (motor oil range. <br /> 1432-6115-13 ND ND ND ND ND ND ND <br /> Unit Conversions: <br /> p&fkg:parts per billion (pph) B,T,LX — bcnrcne. toluene,ethyl hcnrcnc, and total xylenes <br /> mg/kg parts per million (ppm) MTBE = meth}] tcrtiar} but)] ether <br /> TMI-G =total petroleum hydrocarbons, quantified as gasoline <br /> TEPII =total extractable petroleum hydrocarbons, quantified as diesel. <br /> molur oil, and kernsene_ <br /> Nil = none detected at or above lahoratnry detection limits. <br /> (100)=detection limits raised duc to gasoline interference. <br /> (motor oil range'')= organics detected within the motor oil range, h(mever <br /> do not match dre motor nil pattern. <br /> 4" lk4tw_ <br /> L� CONDOR <br />