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I <br /> New Jerusalem School-Quarterly Monitoring Report <br /> April 19, 1999 <br /> j page-3- <br /> TABLE 1 <br /> Groundwater Laboratory Analytical Results.(March 30, 1999) <br /> B I T I E I X I TPH-G Gasoline Oxygenates/Additives <br /> L Detection Limits--> 0.3 0.3 0.3 0.6 0.05 <br /> µg/I µg/I Pg/l Etg/l m I 1.0-I0 <br /> g/ gg/l <br /> i <br /> Sample I.D. <br /> 2500-MW1-3/30/99 ND ND ND ND ND <br /> ND <br /> 2500-MW2-3/30/99 ND ND ND ND ND ND <br /> 2500-MW3-3/30/99 ND ND I ND ND ND Ltp <br /> 2500-DW-3/30/99 ND ND ND ND ND ND <br /> 2500-IW-3/30/99 ND ND ND ND ND ND <br /> Unit Conversions: Analytical: j <br /> pg/]: parts per billion(ppb) B,T,E,X=benzene,toluene,ethyl benzene,and total xylenes <br /> mr/l: parts per million(ppm) TPH-G=total petroleum hydrocarbons,quantified as gasoline <br /> Oxygenates/Additives=methyl tertiary butyl ether(MME),ethanol,tertiary-butanol, <br /> di-isopropyl ether(DIPE),et yl tertiary butyl ether(ETRE)and tertiary amyl methyl ether(TAME). <br /> r ND=not detected at or above the reported laboratory detection limits <br /> 4.4 GROUNDWATER GRADIENT <br /> On March 30, 1999, the depth to groundwater was measured in each well. The average depth to groundwater <br /> was approximately nine feet below the surveyed well collar measuring points. The estimatedg radient was 0.16 <br /> ft./100 ft. to the northeast on March 30, 1999, as shown in Figure 3, Appendix A. Historical groundwater <br /> monitoring data are included in Table 2, on the next page. `! <br /> 1. <br /> i <br /> f � I <br /> t� CONDOR I <br />