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Sherwood <br />' Labs 8071 NORTH LANDER AVENUE <br /> C O R P O R A T I O N PO BOX 937 <br /> HILMAR,CALIFORNIA 95324 <br />' 03/22/01 QUALITY CONTROL REPORT DHS Cert. 01400 <br />' Total Petroleum Hydrocarbons(TPH) Analysis <br /> Client: GEO--PHASE ENVIRONMENTAL Date Received: 03/1.5/01 <br />' 2937 VENEMAN #B240 Date Started: 03/1.8/01 <br /> MODESTO, CA 95356 Date Complete 03/22/01 <br /> ATTN: STEPHEN LANKFORD <br />' Lab Report #: H1031502 Lab Sample #;PH1030842-PH1030850 <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 % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br />' BTEX N/A 107 105 107 96 <br /> TPH Gasoline 100 TPH Diesel N/A <br /> . TRPH (418.1) N/A Motor 03-1 N/A <br /> EHatrix SpAc Recoverioa MS MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 96 98 2 <br /> Toluene 95 100 5 <br />' Ethyl Benz 99 84 14 <br /> Xylenes 101 99 2 <br /> TPH Gasoline 110 108 2 <br />' TPH Diesel N/A N/A N/A <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br />' BTEX N/A <.3 ug/L <.3 ug/L <.3 ug/L <.3 ug/L <br /> TPH Gasoline <50 ug/L D3-esel/M0 N/A TRPH(418.1) N/A <br />' Lab Control sample % Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 102 73.1 - 124 <br /> Toluene 94 73 6 - 120 <br /> Ethyl Benz 94 72.5 118 <br /> Xylenes 96 72.7 - 121 <br />' TPH Gasoline 97 82.4 - 117 <br /> TPH D esel N/A N/A N/A <br /> TRP 18.1) N/A N/A <br /> Nancy ede-nweg, Lab Director <br /> OFFICE (209)667-5258 FAX (209) 667-2581 <br />