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Ms Marla Guensler <br /> February 6, 1992 <br />. Page 3 <br /> TABLE 2 <br /> Ground Water Sample Analytical Results <br /> Concentrations to Parts per Billion (ppb) <br /> Monitoring Ethyl- TPHa as <br /> Well Date Benzene Toluene benzene Xylenesasg ohne <br /> MW-1 08/29/91 <05 <05 <0.5 <05 <50 <br /> 12/13/91 <0.5 <05 <05 <05 75 <br /> MW-2 08/29/91 <0.5 <05 4 9 <05 82 <br /> 12/13/91 <05 <05 <05 <05 <50 <br /> MW-3 08/29/91 240 34 <2.5 3.5 630 <br /> 12/13/91 270 80 < <05 560 <br /> a Total Petroleum Hydrocarbons <br /> The concentrations of BTEX and TPH as gasoline in the ground water sample collected from <br /> monitoring well MW-2 on December 13, 1991, were reported below the laboratory detection limits <br /> . The ground water sample collected from monitoring well MW-1 was reported below the laboratory <br /> detection linnt of 0.5 parts per billion (ppb) for BTEX and 75 ppb for TPH as gasoline The ground <br /> water sample collected from monitoring well MW-3 was reported below the laboratory detection <br /> limit, for ethylbenzene and xylenes, 270 and 8 0 ppb for benzene and toluene, respectively, and <br /> 560 ppb for TPH as gasoline The inferred distribution of dissolved benzene and TPH as gasoline <br /> in ground water beneath the site is illustrated in Figures 4 and 5 <br /> The next sampling event at this site is scheduled for March 1992 <br /> If you have any questions regarding this letter report, please do not hesitate to call the undersigned <br /> at (916) 638-2085 <br /> Sincerely, <br /> DELTA ENVIRONMENTAL CONSULTANTS, INC. <br /> ,41,At- &�,W4 <br /> "Lisa Raing er <br /> Protect Manager <br /> D GAO <br /> (1 <br /> fLarnes <br /> .1n� CV �`> BRaOR Brownell z,� N''o 5078 <br /> California Registered Geologist No 5078 <br /> /hmb (LRP027 TA) F <br /> Enclosures0� CA!XFoP <br />