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Sherwood <br /> 1 Labs 8071 !NORTH LANDER AVENUE <br /> CORPO P A T ! O N PO BOX 937 <br /> HILMAR, CALIFORNIA 95324 <br /> 1 <br /> 03/19/01 QUALITY CONTROL REPORT DHS Cert. #1400 <br />' Total Petroleum Hydrocarbons(TPH) Analysis <br /> Client: GEO-PHASE ENVIRONbMMAI, Date Received: 03/13/01 <br />' 2937 VENEbAN #8240 Date Started: 03/15/01 <br /> MODESTO, CA 95356 Date Complete: 03/19/01 <br /> ATTN: STEPHEN LANKFORD <br /> Lab Report #: H1031301 Lab Sample #iPH1030749-PH1030755 <br /> Linearity Check <br />' BTEX Benzene 0.9992 TPH Gasoline 0.9992 <br /> Toluene 0.9992 TPH Diesel N/A <br /> Ethyl Benz 0.9994 Motor Oil N/A <br />' Xylenes 0.9997 TRPH (418.1) N/A <br /> MTBE N/A <br />' std % Repeatabxlsty MTBE Benzene 'toluene Eth Benz Xylenes <br /> BTEX N/A 112 105 103 103 <br /> TPH Gasoline 98 TPH Diesel 99 <br /> lieTRPH (418.1) N/A Motor Oil 104 <br /> Matrix spike Recoveries MS MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 95 93 2 <br /> Toluene 94 96 2 <br /> Ethyl Benz 93 93 0 <br /> Xylenes 99 96 3 <br /> 1 TPH Gasoline 96 91 5 <br /> TPH Diesel N/A N/A N/A <br /> Method Blank 7 MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A <.3 ug/L <.3 ug/h <.3 ug/L <.3 ug/L <br /> TPH Gasoline <50 ug/L Diesel/MO N/A TRPH(418-1) N/A <br /> Lab Control Sample Rs Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 96 73.1 - 124 <br />' Toluene 91 73.6 = 120 <br /> Ethyl Benz 94 72.5 118 <br /> Xylenes 97 72.7 - 121 <br /> TPH Gasoline 107 82.4 = 117 <br /> TPH Diesel N/A N/A N/A <br /> TRPH (418.1) N/A N/A <br /> cry -1 <br /> OFFICE (209)667-5258 FAX (209)667-2581 <br />