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f <br /> Second aLmnw 1993 Grau1dY1zhw Mordwi o Oster Report <br /> 24Q West KeMeman Lane Lodi,Califomla <br /> GROUNDWATER SAMPLING AND ANALYSES <br /> Groundwater samples were collected from the five wells on April 14, 1993. The samples <br /> were collected according to the Aegis SOP included in Attachment 1, and submitted <br /> under chain-of-custody to Resna Labs, a state-certified analytical laboratory All samples <br /> were analyzed for concentrations of <br /> • Total petroleum hydrocarbons, as gasoline, by GC-FID/EPA Methods 5030/8015 <br /> • Benzene, toluene, ethylbenzene, and total xylenes by GC-FID/EPA Methods <br /> 5030/602 <br /> Analytical results from March 1992 to date, are summarized in Table 2. Previous <br /> analytical results are included in Attachment 4 The laboratory report and chain-of-custody <br /> forms for the current event are included as Attachment 2 Benzene concentrations <br /> remained nondetect in wells MW-20, MW-34, MW-35, and MW-36 similar to the February <br /> 9993 event Well MW-25 was nondetect similar to the March 1992 event which was the <br /> last event that a groundwater sample could be obtained. <br /> Aegis recommends a copy of this quarterly monitoring report be forwarded to the <br /> following parties. <br /> • Mr Harlan Knoll <br /> Environmental Health Division <br /> San Joaquin Public Health Services <br /> Post Office Box 2009 <br /> Stockton, California 95201 <br /> Mr James B Maughan <br /> Central Valley Regional Water Quality Control Board <br /> 3443 Routier Road, Suite A <br /> Sacramento, California 95827-3098 <br /> 92-7340 RP? -2- <br />