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1 <br /> • Thrrd Guart3r 1986 Ground WRW MonrWring RoporL Boaeon$MSG <br /> 900 South Cherokee Lane Loch California <br /> Page 2 <br /> GROUND WATER SAMPLEiG AND ANALYSES <br /> Ground water samples were collected from mne mom tonng wells All samples were analyzed for <br /> concentrations of <br /> o TPH, as gasoline, by modified EPA Method 8015 <br /> o BTEX by EPA Method 602 <br /> i <br /> The sample collected from monitoring well MW-27 was also analyzed for <br /> o TPH, as diesel, by modified EPA Method 8015 <br /> Analytical results collected since February 1992 are summarized in Table 2 Historical analytical data <br /> are contained in Attachment D Figure 3 illustrates the inferred distribution of benzene in ground <br /> water based on the current data The laboratory report and chain-of-custody form for the current <br /> sampling event are contained in Attachment E Benzene was not present in detectable concentrations <br /> in ground water samples collected from monitoring wells MW-18, MW-21, MW-24, MW-27, MW- <br /> • 28, MW-29, MW-30, and RW-1 Benzene concentrations increased in the sample collected from <br /> monitoring well RW-2 <br /> A copy of this quarterly momtonng report should be forwarded to <br /> Ms Linda Turkette <br /> Environmental Health Division <br /> San Joaquin County Public Health Services <br /> Post Office Box 2009 <br /> Stockton, Cahforma 95201 <br /> Mr Gordon Boggs <br /> Central Valley Regional Water Quality Control Board <br /> 3443 Routxer Road, Suite A <br /> Sacramento, California 95827-3098 <br /> EI Dorado Environmental, Inc <br />