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Sherwood <br /> � Labs 807 NORTH LANDER AVENUE <br /> C O R P O R A T 1 0 N P.O. BOX 937 <br /> HILMAR, CALIFORNIA 95324 <br /> 04/20/2000 QUALITY CONTROL REPORT DHS Certification #1400 <br /> Total Petroleum Hydrocarbon(TPH)Analysis Nancy Biedenweg, Lab Director l <br /> Client: DEL-TECH Date Received: 04/10/2000 <br /> 10624 OLIVE AVE Date Started: : 0411012000 <br /> OAKDALE, CA 95361 Date Complete: 04111/2000 <br /> ATTN: DON LIGHT <br /> Lab Re art P H0041001 Lab Sample##s: PH0040230-PH0040234 <br /> Linear4 Check: <br /> BTEX Benzene 0.9986 TPH Gasoline 0.9983 <br /> Toluene 0.9994 TPH Diesel NIA <br /> Ethyl Benz 0.9995 Motor Oil NIA <br /> Xylenes 0.9981 TRPH (418.1) NIA <br /> MTBE 1.0000 <br /> Std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX 95 98 98 97 94 <br /> TPH Gasoline 103 TPH Diesel NIA <br /> ' TRPH (418.1) NIA TPH Motor Oil NIA <br /> Matrix S ike Recoveries MS MSD RPD <br /> MTBE 112 105 6.5 <br /> BTEX Benzene 100 101 1.0 <br /> Toluene 102 98 4.0 <br /> Ethyl Benz 100 99 1.0 <br /> Xylenes 104 104 0.0 <br /> TPH Gasoline 107 1)Q 1 9 <br /> TPH Diesel N/A NIA ERR <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX <.3 yj <.3 <.3 yj <.3 ugiL <br /> TPH Gasoline <50 u TPH DiesellMO NIA TRPH(418.1) NIA <br /> Lab Control Sample %, R covery EPA Performance Acceptance Range <br /> BTEX Benzene 104 73.1 124 <br /> Toluene 95 73.6 - 120 <br /> Ethyl Benz 111 72.5 - 118 <br /> Xylenes 101 72.7 - 121 <br /> TPH Gasoline 112 82.4 - 117 <br /> TPH Diesel NIA NIA NIA <br /> TRPH (418.1) NIA NIA <br /> ' OFFICE: (209)667-5258 FAX: (209)6672581 <br />