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i <br /> Sherwood <br /> 15Z DER AVENUE <br /> 8071 NORTH LAN <br /> Labs <br /> C 0 R P 0 R A T 10 N P.O. BOX 937 <br /> HILMAR, CALIFORNIA 95324 <br /> Certification <br /> Volatile Analyses Nancy Biedenweg, Lab Director <br /> Client: DEL-TECH Date Received: 121244/97 <br /> 10624 OLIVE AVE Date Started: 12/24/97 <br /> OAKDALE, CA 95361 Date Complete: 12/31/97 <br /> ATTN. DON LIGHT <br /> Lab Report M. H7122411 Lab Sample#s: PH7122223-2235 <br /> Linearf Check: <br /> BTEX Benzene 0.9999 TPH Gasoline 0.9999 <br /> Toluene 0.9998 TPH Diesel NIA <br /> Ethyl Benzene 0.9999 Motor Oil NIA <br /> Xylenes 0.9996 TRPH (418.1) NIA <br /> MTBE NIA <br /> Std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX NIA 97 97 98 95 <br /> TPH Gasoline 93 TPH Diesel NIA <br /> TRPH (418.1) NIA TPH Motor Oil NIA <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE NIA NIA ERR <br /> BTEX Benzene 107.0 102.0 4.8 <br /> Toluene 109.0 107.0 1.9 <br /> Ethyl Benzene 107.0 106.0 0.9 <br /> Xylenes 107.0 101.0 5.8 <br /> TPH Gasoline * 71.0 72.0 1.0 <br /> TPH Diesel NIA NIA ERR <br /> * Low recovery due to matrix Interference. NIA <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX NIA <.3 C3 ug/L <.3 ug/L- <.33 u / <br /> TPH Gasoline <50 TPH Diesel/MO NIA TRPH(418.1) NIA <br /> Lab Control sample% Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 106 74.6 - 126.0 <br /> Toluene 109 70.7 - 118.0 <br /> Ethyl Benz 112 70.8 - 119.0 <br /> Xylenes 107 74.6 - 116.0 <br /> TPH Gasoline 105 65.2 - 146.0 <br /> TPH Diesel NIA - <br /> TRPH (418.1) NIA NIA <br /> OFFICE; (209) 667.5258 . FAX: (209) 667-2581 . BBS: (209) 667-4119 <br />