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Herman& Wien s Mann i E first Quarter 2000 Groundw tree Monitoring <br /> April 20 2000 <br /> lige-4- <br /> • TABLE 2 <br />' Laboratory Analytical Results <br /> Groundwater Samples (March 17, 2000) <br /> Oxygenates/Additives <br /> B r F X TPN-G tett - <br /> MTBE Ethanoi Butanol D1PE FTBE TAME <br />' Detection 0 3 0 3 03 06 005 1 () 10 l0 f 0 1 () 1 0 <br /> Limits LL-/l 4g/i ug I µg/l mg"I lLg/l ug/I ug11 ug/1 lL&I ltg/l <br /> Analytical Method 602 602 602 602 X030/1 [JET 8260 8260 8260 8260 8260 8260 <br /> Sample l D <br /> [1432-iMWI-3/17/00 ND ND ND ND ND NO NO ND NO ND NO <br /> 1432-MW2-3/17100 92 ND* ND* ND* ND* 59,000 ND* ND* ND* ND* ND* <br /> 1432-MW3-3/17100 1 7 ND ND NO ND 3,600 ND* ND* ND* ND* NDS` <br /> 1432-MW4-3117/00 1 332 ND 10461 58 1 0 30 ND ND ND ND ND :ND <br /> Unit Convt,rsions Analytical <br /> µg/l parts per billion(pph) RTFX hc.nzt.nL lnlucnC ethyl benzene and total xylenes <br /> mg/1 parts per million(ppm) TPH-() total petroleum hydrocarbon quantified as gasolinL <br /> M FI-31 methyl Cert-butyl ether <br /> turt Butanol -tertiary-butanol <br /> I)11'I di-isopropyl ether <br /> I FBI- ethyl tertiary-butyl ether <br /> [ANI F tertiary-amyl methyl ether <br /> ND=not dc,teeted at or above the laboratory reported detection limit <br /> ND* not dLtCctt,d at or above a raised laboratory reported detection limit Sec, laboratory report <br /> sheets for detection limits <br /> 3 4 GROUNDWATER CONTOURS <br /> Groundwater elevation measurements collected at the site on March 17, 2000, indicate that the average depth to <br /> groundwater was approximately six teet below the monitor well and island drainage channel surface water <br />' station measuring points Access to the Slough water surface measurement station was not available because of <br /> construction activities The depth to the slough water surface was, therefore, not measured The groundwater <br /> elevations for the wells and the island drainage channel water surface elevation are shown in Hgurc 4, Appendix <br /> A Figure 4 shows the estimated groundwater elevation contours on March 17, 2000 The contours indicate a <br /> steep groundwater gradient towards the island drainage channel <br /> i <br /> I <br /> • <br /> tr� CONDOR <br />