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'I A$Ir 4 <br /> ;:...a <br /> ANAL' <br /> T[CAL,RESTJLTS �R©IIND WATER <br /> Vr1aR�< st Mafia Stukton <br /> Sample or Ethyl- <br /> Well Number Sampling Date TRPH-d TPH-g Benzene Toluene Benzene Xylenes <br /> MW-4 06/20/94 ND ND ND ND ND ND <br /> 09/19/94 ND ND ND ND ND ND <br /> 12/15/94 ND ND ND ND ND ND <br /> 07/07/95 NA ND ND ND ND ND <br /> MW-5 06/20/94 ND ND ND ND ND ND <br /> 09/19/94 ND ND ND ND ND ND <br /> 12/15/94 ND ND ND ND ND ND <br /> 07/07/95 NA ND ND ND ND ND <br /> MW-6 06/20/94 ND 3700 200 44 41 150 <br /> 09/19/94 ND 2000 100 ND 90 125 <br /> 12/15/94 ND 3470 96 7 21 147 <br /> 07/07/95 NA 1250 199 10 76 77 <br /> MW-7 07/07/95 ND ND ND ND ND ND <br /> MW-8 07/07/95 ND ND ND ND ND ND <br /> Slough SW-A 01/13/95 ND ND ND ND ND ND <br /> Reporting Limit 06/20/94 50 50 0.3 0.3 0.3 0.3 <br /> 09/19/94 50 1 3 3 3 3 <br /> 12/15/94 50 50 0.3 0.3 0.3 0.3 <br /> :z 01/13/95 50 50 0.3 0.3 0.3 4.3 <br /> 07/17/95 50 50 0.3 0.3 0.3 0.3 <br /> ND: Not detected above the laboratory reporting limit <br /> MCLS inµglf:benzene=l;toluene=100;ethylbenzene=680;total xylenes=1750 <br /> 5.0 SUMMARY <br /> The most recent assessment work leading to the preparation of this Problem Assessment Report <br /> was directed by W.W. Irwin, Inc. on July 3 and 7, 1995. MW-7 and MW-8 were completed <br /> following the rushed return of nondetectable Hydropunch`'''analytical results by Sherwood Labs <br /> on July 3. Also on that date, two additional Hydropunches', HP-9 and HP-10, were sampled <br /> and backfilled with Portland cement. The information summarized here was compiled from <br /> work completed since July 20, 1993 when overexcavation activities were completed to the extent <br /> possible. <br /> W.W. Irwin, Inc. <br /> Project No. 33016.05& .06 <br /> _.r August 1995 13 <br />