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r n <br /> Second Quarter 1997 Ground Water Monitoring Report,Beacon N$95 <br /> • 9W South Cherokee Lane Lodi California <br /> Page 2 <br /> GROUND WATER SAMPLING AND ANALYSES <br /> Ground water samples were collected from eighteen monitoring wells All samples were analyzed <br /> for concentrations of <br /> O TPH, as gasoline, by modified EPA Method Modified 8015 <br /> 0 BTEX by EPA Method 602 <br /> 0 MTBE by EPA Method 602 <br /> ® TPH, as diesel, by modified EPA Method Modified 8015 <br /> Analytical results collected since February 1992 are summarized in Table 2 Historical analytical <br /> data are contained in Attachment D Figure 3 illustrates the inferred distribution of benzene in <br /> ground water based on the current data The laboratory report and chain-of-custody form for the <br /> current sampling event are contained in Attachment E Benzene was not present in detectable <br /> concentrations in ground water samples collected from monitoring wells MW-1, MW-15, MW-16, <br /> MW-18, MW-19, MW-20, MW-21, MW-23, MW-24, MW-25, MW-27, MW-28, MW-29, MW-30 <br /> and recovery wells RW-1 and RW-2 Benzene concentrations increased in the samples collected <br /> from monitoring wells MW-8 and MW-17 compared to the previous sampling event <br /> A copy of this quarterly monitoring 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, California 95201 <br /> Mr Gordon Boggs <br /> Central Valley Regional Water Quality Control Board <br /> 3443 Routier Road, Suite A <br /> Sacramento, California 95827-3098 <br /> El Dorado Environmental, Inc <br />