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First Quarter 1993 Groundwater Monitoring Data Report <br /> 2448 West Kettleman Lane Lads California <br /> GROUNDWATER SAMPLING AND ANALYSES <br /> Aegis personnel collected groundwater samples from the four 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 (TPH), <br /> as gasoline, by GC-FID/EPA Methods 5030/8015, and b) benzene, toluene, <br /> ethylbenzene, and total xylenes (BTEX) by GC-FID/EPA Methods 5030/602 Current <br /> analytical results, and prior 1992 analytical results only, are summarized in Table 2 The <br /> analytical laboratory reports and chain-of-custody forms are included as Attachment 2 <br /> Previous analytical results are included in Attachment 4 The samples from all four wells <br /> indicated concentrations below the method detection limas for TPH, as gasoline, and <br /> BTEX <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 /> 10 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 /> si <br /> 92A734B RFr -2 <br />