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i Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> C 0 R P 0 R A T / O N P.O. BOX 937 <br /> HILMAR, CALIFORNIA 95324 <br /> 09/14198 QUALITY CONTROL REPORT DHS Certification#1400 <br /> Volatile Analyses Nancy Biedenweg, Lab Director <br /> Client: DEL-TECH Date Received: 09/09/98 <br /> 10624 OLIVE AVE Date Started: : 09/11/98 <br /> OAKDALE, CA 95361 Date Complete: 09/14/98 <br /> ATTN: DON LIGHT <br /> Lab Report#: H8090902 Lab Sample#s: PH8090480-87 <br /> Llneartty Check: <br /> BTEX Benzene 0.9996 TPH Gasoline 0.9992 <br /> Toluene 0. 986 TPH Diesel 0,9998 <br /> Ethyl Benzene 0.9995 Motor Oil 0.9975 <br /> Xylenes 0.9990 TRPH (418.1) NIA <br /> MTBE NIA <br /> Std %Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX NIA 100 103_ 103 101 <br /> TPH Gasoline 97 TPH Diesel 98 <br /> TRPH (418.1) NIA TPH Motor Oil 94 <br /> Matrix S Ike Recoveries MS MSD RPD <br /> MTBE NIA N/A ERR <br /> BTEX Benzene 97 101 4.0 <br /> Toluene 100 99 1.0 <br /> Ethyl Benzene 108 111 2.7 <br /> Xylenes 101 102 1.0 <br /> TPH Gasoline 105 93 121 <br /> TPH Diesel 91 94 3.2 <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A <.3 <.3 ug <,3 ug/L, <,3 ug/L <br /> TPH Gasoline <5�TPH Diesel/MO <50 u TRPH(418.1) N/A <br /> Lab Control Sample %Recove EPA Performance Acceptance Range <br /> BTEX Benzene 100 73.3 - 126 <br /> Toluene 97 73.0 - 118 <br /> Ethyl Benz 100 71.2 - 118 C` �lED <br /> Xylenes 79 71.6 - 120 OCT 14 1998 <br /> TPH Gasoline 128 68.0 - 150 <br /> TPM Diesel 110 41.3 - 122.0 F ,s, ,.__ cx Assoc <br /> TRPH (418.1) NIA WA <br /> OFFICE: (209) 667-5258 • FAX: (209) 667-2581 0 BBS: (209) 667-4119 <br />