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WORK PLAN-Monitor Well Installation <br /> Herman&Helen's Marina <br /> May 30,1997 <br /> ' Page-S- <br /> TABLE 2.2 <br /> Laboratory Results (Groundwater/Hydropunch - August 1995) <br /> B T E X TPH-G TEPH <br /> Detection 0.3 0.3 0.3 0.6 0.05 0.05-0.5 <br /> ' Sample I.D. Limits: µg/L pg/L Ag/L pg/L mg/L mg/L <br /> 1432-HPI-8/22/95 3.2 14 5.5 26 0.22 0.79 <br /> ' (diesel) <br /> 1432-HP2-8/22/95 0.4 1.3 ND 8.7 ND 0.57 <br /> (diesel) <br /> ' 1432-HP3-8/22/95 (#) 260 ND 8.4 36 1.0 0.24 <br /> (diesel) <br /> Unit Conversions: <br /> ltg/L:parts per billion(ppb) B,T,E,X =benzene,toluene,ethyl benzene,and xylene. <br /> mg/L:parts per million(ppm) TPH-G=total petroleum hydrocarbons, quantified as gasoline. <br /> TEPH=total extractable petroleum hydrocarbons,quantified as diesel, <br /> motor oil,and kerosene. <br /> ' ND=none detected at or above the reported laboratory detection limits. <br /> p=detection limit raised due to gasoline interference. <br /> ' Based on the results of the August, 1995, investigation, Condor recommended additional investigation <br /> be conducted to evaluate the extent of the hydrocarbon plume (reference Soil and Groundwater <br /> Investigation Report, prepared by Condor, dated September 26, 1995). Mr. Ronald Rowe of the <br /> t PHS/EHD verbally approved the proposal for additional investigation during a telephone conversation <br /> with Condor in mid-February, 1996. <br /> ' On August 29, 1996, five (5) Geoprobe boreholes (GP-1 through GP-5) were installed at the site <br /> (Figure 2, Appendix A). Linda Turkette of the PHS/EHD was on site to observe the fieldwork. Soil <br /> and groundwater samples were collected during the investigation for laboratory analyses. The results <br /> of the laboratory analyses indicated that elevated concentrations of TPH-G, BTEX, and MTBE were <br /> detected at GP-4. The TEPH (motor oil range) concentrations detected in soil samples collected from <br /> GP-2, GP-3, and GP-4, are questionable and are likely to be associated with the natural organic <br /> t content of the soil (i.e., peat), which is known to produce false positive results (see Tables 2.3 and 2.4, <br /> below). <br /> t <br /> 1 <br /> ' �� CONDOR <br />