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Sherwood <br /> Labs8071 NORTH LANDER AVENUE <br /> P O BOX 937 <br /> CORPORA TION <br /> HILMAR, CALIFORNIA 95324 <br /> 10/16/97 QUALITY CONTROL REPORT DHS Certification #1400 <br /> Nancy Biedenweg, Lab Director <br /> Client DEL-TECH Date Received, 10/14/97 <br /> 10624 OLIVE AVE Date Started, : 10/14/97 <br /> OAKDALE, CA 95361 Date Complete: 10/15/97 <br /> ATTN- DON LIGHT <br /> Lab Report # H7101403 Lab Sample #s PH7101483-1509 <br /> Linearity Check. <br /> BTEX Benzene 0.9997 TPH Gasoline 0.9997 <br /> Toluene 09997 TPH Diesel N/A <br /> Ethyl Benzene 09998 Motor Oil N/A <br /> Xylenes 09999 TRPH (418.1) N/A <br /> MTBE 09999 <br /> Std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 101 102 104 102 <br /> TPH Gasoline 105 TPH Diesel N/A <br />• TRPH (418.1) N/A TPH Motor Oil NIA <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE N/A N/A ERR <br /> BTEX Benzene 1000 1000 00 <br /> Toluene 1000 1010 1 0 <br /> Ethyl Benzene 101 0 1020 1.0 <br /> Xylenes 1010 1010 0.0 <br /> TPH Gasoline 1070 1070 00 <br /> TPH Diesel N/A N/A N/A <br /> TRPH 4181 N/A <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> HTEX N/A <.3 u c.3 u L c.3 u L < 3 u L <br /> TRH Gasoline <50 u L TPH Diesel/MO N/A TRPH(4181) N/A <br /> Lab Control Sample % Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 97 549 - 141 <br /> Toluene 97 687 - 127 <br /> Ethyl Benz 87 706 - 130 <br /> Xylenes 102 693 - 138 <br />. TPH Gasoline 123 652 - 146 <br /> TPH Diesel N/A N/A <br /> TRPH (4181) N/A N/A <br /> OFFICE (209) 667-5258 . FAX (209) 667-2581 BBS (209) 667 4119 <br />