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Report—Monitor Well Installation and Sampling <br /> h New Jerusalem School <br /> February 26, 1999 <br /> Page-6 <br /> 1 " • Monitor Well MW-3: <br /> BTEX, TPH-G, and MTBE were not detected at or above the laboratory reported detection limits in <br /> the soil samples collected from 10, 15, 20, and 25 feet bgs_ MTBE was initially detected in the soil <br /> sample collected at ten feet bgs at a concentration of 27 µg/kg. However, analysis of this sample by <br /> { {j,• EPA Method 8260 failed to confirm the presence of MTBE. <br /> ' The soil sample analytical results are presented below in Table 2. The laboratory certificates of analyses 1 <br /> and the chain-of-custody form for the soil samples are included i'n Appendix E. <br /> i <br /> TABLE 2 <br /> Soil Sample Analytical Results <br /> B T E . X TPH-G MTBE <br /> Detection 5.0 5:0 5.0 <br /> E 5.0 1.0 10 <br /> Limits: pg/kg Mg/kg µg/kg ug/kg mg/kg µg/kg <br /> Sample I.D. <br /> 2500-MW 1-5 ND ND ND 7.3 ND ND <br /> 2500-MW1-10 ND ND ND ND ND ND <br /> 2500-MW2-10 ND ND ND ND ND ND <br /> 2500-MW2-20 ND ND ND ;� ND ND ND <br /> } 2500-MW2-25 ND ND ND ; ND ND ND <br /> 2500-MW3-10 ND ND ND j ND ND ND* <br /> 2500-MW3-15 ND ND ND ND ND ND <br /> i 2500-MW3-20 ND NDND ND ND ND <br /> t <br /> 2500-MW3-25 ND ND ND ND ND ND <br /> Unit Conversions: Analytical: <br /> µg/kg:parts per billion(ppb) B,T,E,X=benzene,toll ne,ethyl benzene,and xylene. <br /> m arts per million m <br /> ?�g�P� P (pp ) TPH-G=total petroleum hydrocarbons,quantified as gasoline. <br /> MTBE=methyl tertiary butyl ether. <br /> ND=not detected at or above laboratory detection limits. <br /> result confirmed using EPA Method 8260. <br /> j <br /> i <br /> l <br /> I 5.2 GROUNDWATER SAMPLES p <br />} BTEX, TPH-G, and the selected gasoline oxygenates/additiv s. were not detected at or above the <br /> laboratory reported detection limits in the groundwater samples collected from the monitor wells or the <br />'. irrigation well and domestic well. The groundwater sample analytical results are presented in Table 3 oil <br /> 1 the next page. The laboratory certificates of analyses and chain-of-custody form for the groundwater <br /> samples are included in Appendix E. a <br /> I i <br /> i <br /> tJ CONDOR <br />