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Sherwood <br /> Lass 8077 NORTH LANDER AVENUE <br /> S CORPORATION R.O. BOX 937 <br /> HILMAR,CALIFORNIA 95324 <br /> 07/05/01 QUALITY CONTROL REPORT DHS Cert. #1400 <br /> Total Petroleum Hydrocarbons(TPH) Analysis <br /> Client: DEL-TECH Date Received: 06/28/01 <br /> 10624 OLIVE AVENUE Date Started. 07/01/01 <br /> OAKDALE, CA 95361 Date Complete: 07/03/01 <br /> ATTN: DON LIGHT <br /> Lab Report #: H1062802 Lab Sample #:PH1061537 <br /> Linearity Check: <br /> BTEX Benzene 0.9991 TPH Gasoline 1.0000 <br /> Toluene 0.9996 TPH Diesel N/A <br /> Ethyl Benz 0.9998 Motor Oil N/A <br /> Xylenes 0.9999 TRPH (418.1) N/A <br /> MTBE N/A <br /> std It Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 98 102 99 108 <br /> • TPH Gasoline 102 TPH Diesel N/A <br /> TRPH (418.1) N/A Motor Oil N/A <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 101 104 3 <br /> Toluene 101 101 0 <br /> Ethyl Benz 97 100 3 <br /> Xylenes 107 104 3 <br /> TPH Gasoline 99 95 4 <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 Diesel/MO 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 98 73.6 - 120 <br /> Ethyl Benz 111 72.5 - 118 <br /> Xylenes 111 72.7 - 121 <br /> • TPH Gasoline 99 82.4 - 117 <br /> TPH Diesel N/A N/A N/A <br /> ,TRPH (418.1) N/A N/A <br /> Nancy Biodenweg, Lab Da �P09)667-5258 FAX: (209)667-2581 <br />