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r <br /> t' First Quarter 1993 Groradwiater Morntodrig Report <br /> 900 South Cherokee Lane Lodi California <br /> GROUNDWATER SAMPLING AND ANALYSES <br /> Aegis personnel collected groundwater samples from the nine wells on February 5, 1993 <br /> The samples were collected according to the Aegis SOP included in Attachment 1, and <br /> submitted under chain-of-custody to Resna Labs, a state-certified analytical laboratory <br /> All samples were analyzed for concentrations of a) total petroleum hydrocarbons, as <br /> gasoline, by GC-FID/EPA Methods 5030/8015, and b) benzene, toluene, ethylbenzene, <br /> and total xylenes by GC-FID/EPA Methods 5030/602 Current analytical results, and prior <br /> 1992 analytical results only, are summarized in Table 2 Figure 3 is a distribution map of <br /> benzene in groundwater based on the data summarized in Table 2 The analytical <br /> laboratory reports and chain-of-custody forms are included as Attachment 2 Previous <br /> analytical results are included in Attachment 4 Benzene concentrations for samples from <br /> seven of the nine wells were below the method detection limit Only wells MW-10 and <br /> MW-17 had benzene concentrations above the 0 5 parts-per-billion detection limit <br /> Aegis recommends a copy of this quarterly monitoring report be forwarded to the <br /> following partes <br /> Ms Linda Turkatte <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 /> 92 733B RFT -2 <br />