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3� <br /> tom' <br /> C'r+arterly Groundwater Monitoring Report <br /> ij 14800 West Frontage Road Manteca California <br /> WATER SAMPLING AND ANALYSIS <br /> On April 20, 1992, Aegis personnel collected groundwater samples from wells MW-1 <br /> through MW-9 The samples were collected according to the Aegis SOP included in <br /> Attachment 1, and delivered under chain-of-custody to NET Pacific, Inc , of Santa Rosa, <br /> California, a state-certified analytical laboratory The samples were analyzed for <br /> concentrations of <br /> • total petroleum hydrocarbons (TPH), as gasoline, by GC/FlD Method 5030, <br /> and, <br /> • benzene, toluene, ethylbenzene, and total xylenes by EPA Method 8020 <br /> The analytical results are summarized in Table 2 The laboratory analytical reports and <br /> chain-of-custody forms are included in Attachment 2 A map showing TPH, as gasoline, <br /> and benzene distributions on April 20, 1992, is included as Figure 6 <br /> i <br /> 90-0976 OMR 3 <br />