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Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> C O R P O R A T 1 O N P.O. BOX 937 <br /> HILMAR, CALIFORNIA 95324 <br /> 04109!98 QUALITY CONTROL REPORT DHS Certification#1400 <br /> Volatile Analyses Nancy Biedenweg, Lab Director <br /> Client: DEL-TECH Date Received: 04102/98 <br /> 10624 OLIVE AVE Date Started: : 04107198 <br /> OAKDALE, CA 95361 Date Complete: 04109/98 <br /> ATTN: DON LIGHT <br /> Lab Re ort* H8040203 Lab Sample#s: PH8040049-57 <br /> Lineari Check: <br /> BTEX Benzene 0.9998 TPH Gasoline 0.9998 <br /> Toluene 0.9994 TPH Diesel NIA <br /> Ethyl Benzene 0.9992 Motor Oil NIA <br /> Xylenes 0.9996 TRPH (418.1) N/A <br /> MTBE N/A <br /> Std % Re eatabili MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N� IA1� 10 105 114 98 <br /> TPH Gasoline 99 TPH Diesel NIA <br /> TRPH (418.1) N/A TPH Motor Oil N1A <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE NIA NIA ERR <br /> BTEX Benzene 99.0 100.0 1.0 <br /> Toluene 95.0 91.0 4.3 <br /> Ethyl Benzene Spike insignificant relative to sample concentration ERR <br /> Xylenes Spike insignificant relative to sample concentration ERR <br /> TPH Gasoline 91 90 1.1 <br /> TPH Diesel NIA NIA ERR <br /> NIA <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX NIA <.3 u <.3 ug/L <3 ug/L < <br /> TPH Gasoline <S�TPH Diesel/MO NIA TRPH(418.1) N/A <br /> Lab Control Sample% Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 95 74.6 - 126.0 <br /> Toluene 91 70.7 - 118.0 <br /> Ethyl Benz 91 70.8 - 119.0 <br /> Xylenes 92 74.6 - 116.0 <br /> . TPH Gasoline _ 88 _ 67.9 - 150.0 <br /> TPH Diesel NIA 41.1 - 121.0 <br /> TRPH (418.1) NIA N/A <br /> OFFICE: (209) 667-5258 . FAX: (209) 667-2581 . BBS: (209) 667-4119 <br />