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4g- i s r <br /> � F <br /> ,.,i. W. --m a;, <br /> fi <br /> tAs.Linda Turkatte <br /> August 22,1991 <br /> Page 2 <br /> procedures <br /> FEW eruct htcasurements well <br /> clatectu ,ira. r;ttoring <br /> _ 1991, fsec product was y ter sarnpies collected=from• <br /> once of free product°r product sheen in the monitoring wells was evaluated using ll <br /> The Pres Enciosum A. Um iuly.23+ observed on ground m mcraitoring Wu <br /> described in sand Praiuct sheen w 1991.tree product was rietc+�ted <br /> (tnic &.:0.02-foot) 14SW-�: (7a;f;u6+ t 1, on water samples collected from the <br /> mortitating,we116`MW`3 ' not 0115CNed <br /> thio 0OS.foot),but product sheen was <br /> .Drlh;-4( wells. Free product and product sheen observations pre included in Table I. <br /> other monitoring way operating alternately in monitoring <br /> product.-only pump operating <br /> orated p ail 1991. product roc°vcry Pumps have beat op g <br /> product shun was detected in <br /> A Westinghouse pneumatic 1 nua:}r and APctther free product nor p product <br /> wells MW-2 and MW-7 beProduct j <br /> W.'119 3v,y 23,1`91• These wells were not examined for free <br /> in both wells simultaneously since May lggl_ N <br /> wells MW-2 and lvt August 1.1991. The total amauonndfwatte Pas well <br /> monitoring um shave been discharging$ <br /> or product ins I1 when <br /> nw ate not known because <br /> pumps <br /> mp <br /> recovered <br /> as product. <br /> •—ti;•tical ReSUM W A M g,and <br /> water Sam jiga�d..`,ry---1 W-5,M W <br /> C.rourl--- 1v1W-3,M l� due to the <br /> MW..}, and MW-7 were not sampled <br /> water <br /> Ground water samples were Collected front monitoring wells MW-1 described above. le was <br /> an July 23, 1991• ►.Monitoring%vells 1 Pumps, Each ground water camp <br /> f PAW�9 Product or cocrating product recovery P ctrolcum <br /> Presence o; free Q rocedares described in Enclasur�c es (ETEX), and total p <br /> e were collected using P eth lben7unc, x} and California <br /> samples mental Pratcstion AgC results <br /> round water <br /> asol'sne, using U.S. Environm' rr�ults for g <br /> submitted far, analysis of benzene, taluenLthods The an�tlytica!laboratory <br /> hydrocarbons (TI?14) as g roved m' Tc bl�2. pr,,-vrous rc suits are ais. provided <br /> in <br /> Department of Health Se ices <br /> 3,199,are summarized in <br /> samQles <br /> caltected on 3ut y les o€lige certified laboratory reports for the July 1991 sampling <br /> Table 2 for c°i.-naris°n p hydrocarbon constituents <br /> included in Enclosure p:. Petroleum by <br /> 23, um. Concentrations of'fPH <br /> Samples collected on]uly (MW-9), and benzene <br /> Analytical test results i"i aground write tS amples concentrations <br /> °q 110,000 ppbConcentrations <br /> of petroleum <br /> were frescnt in each arts Per billion (ppb){ ,, W.g), l,n event <br /> as gasoline ranged from 120 P b MW--) to 15,000 PPb ( revious camp•-g <br /> ed from 1.1 PP ( les enerally increased since the p <br /> concentrations rang les collected from monitoring wells MW-1 <br /> hydrocarbon constituents in ground water same $ <br /> Sample collected tram nt°nitorin$well MW 9,have decrcasei <br /> in April 1991; however-concent in the of benzene l to camp <br /> and pail and TP as ga`olinc in the same , <br />