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New Jerusalem School-Quarterly Monitoring Report <br /> April 19, 1999 <br /> r Page-4- <br /> TABLE 2 <br /> Historical Groundwater Monitoring Data <br /> V <br /> DATE DTW Ground B T E X TPH-G Gasoline Oxygenates/Additives <br /> Water <br /> Elev. <br /> Detection <br /> Limits-+ 0.3 0.3 0.3 0.6 0.05 1.0—10 <br /> µ9/l µg/I µg/1 µg/I mg/l ugn <br /> tr <br /> Well <br /> (TOC Elev.) <br /> w MW-1 12/29/98 9.04 90.88 ND ND j ND ND ND ND <br /> (99.92) 3/30/99 9.21 09.71 ND ND ND ND ND ND <br /> �+ MW-2 12/29/98 8.78 90.83 ND ND ND ND ND ND <br /> (99.61) 3/30/99 8.94 90.67 ND ND ND ND ND ND <br /> MW-3 12/29/98 8.59 90.81 ND ND ND ND ND ND <br /> L (99.40) 3/30/99 8.73 90.67 ND ND ND ND ND ND <br /> DW 12/29/98 NA NA ND ND ND ND ND ND <br /> 3/30/99 NA NA ND ND ND ND ND ND <br /> IW 12/29/98 NA NA ND ND ND ND ND ND <br /> 3/30/99 NA NA ND ND ND ND ND ND <br /> TOC=Top of Casing DTW=Depth to Water Note: all elevations are relative,referenced to an arbitrary datum plane. DW=Domestic Well iW=Irrigation Well <br /> Unit Conversions: Analytical: <br /> po: parts per billion(ppb) B,T,E,X=benzene,toluene,ethyl benzene,and total xylenes <br /> mg/1: parts per million(ppm) TPH-G=total petroleum hydrocarbons,quantified as gasoline <br /> Oxygenates/Additives include methyl tertiary-butyl ether(MTBE),e0tanol,tertiary-butanol, <br /> di-isopropyl ether(DIPS),ethyl tertiary-butyl ether(ETRE),and tertiary-amyl methyl ether(TAME) <br /> ND=not detected at or above the reported laboratory detection limits <br /> iV+r <br /> NA=not applicable <br /> 5. SUMMARY/CONCLUSIONS <br /> On March 30, 1999, a Condor representative was on site to measure water levels and collect groundwater <br /> samples from the site monitor wells. No floating product, sheen, and/or discoloration were observed in any of <br /> '-' the monitor wells during the groundwater sampling. Petroleum hydrocarbon odors were not detected in the <br /> groundwater recovered from any of the wells. <br /> '-� Laboratory analytical results associated with groundwater samples collected at the site on December 30, 1998 <br /> and March 30, 1999 indicate that BTEX, TPH-G, and gasoline oxygenates/additives were not detected at or <br /> above the laboratory reported detection limits in any of the samples. <br /> V <br /> The average depth to ground water was approximately nine feet below the surveyed well collar measuring points <br /> and the estimated gradient was 0.16 ft./100 ft. to the northwest on March 30, 1999_ <br /> Mtr CONDOR <br /> v <br />