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Sherwood <br /> LabsNORTH LANDER AVENUE <br /> C 0 R P O R A T l 0 N P.O. BOX 937 <br /> HILMAR,CALIFORNIA 95324 <br /> 10/01/97 QUALITY CONTROL REPORT DHS Certification #1400 <br /> Nancy Biedenweg, Lab Director <br /> Client: DEL-TECH Date Received: 08/26/97 <br /> 10624 OLIVE AVE Date Started: : 08/26(97 <br /> OAKDALE, CA 95361 Date Complete: 08/29/97 <br /> ATTN: DON LIGHT <br /> Lab Report #: H7082602 Lab Sample #s PH7081861-1864 <br /> Linearity Check <br /> BTEX Benzene 0.9999 TPH Gasoline 0.9996 <br /> Toluene 0.9999 TPH Diesel 0.9998 <br /> Ethyl Benzene 0.9998 Motor Oil 0.9987 <br /> Xylenes 0.9993 TRPH (418.1) NIA <br /> MTBE NIA <br /> Std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX NIA 102 100 99 104 <br /> TPH Gasoline 103 TPH Diesel 101 <br /> TRPH (418.1) N/A TPH Motor Oil 98 <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE N/A N/A ERR <br /> BTEX Benzene 105.0 104.0 1.0 <br /> Toluene 109.0 108.0 0.9 <br /> Ethyl Benzene 115.0 111.0 3.5 <br /> Xylenes 110.0 112.0 1.8 <br /> TPH Gasoline 99.0 101.0 2.0 <br /> TPH Diesel 93 100 7.3 <br /> TRPH 418.1 N/A <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A <3 ug/Kg <3 ug <3 ug//Kg <3 ug/Kg <br /> TPH Gasoline <1 m K TPH Diesel/MO <5 m K TRPH(418.1) N/A <br /> Lab Control Sample% Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 83 54.9 - 141 <br /> Toluene 93 68.7 - 127 <br /> Ethyl Benz 101 70.6 - 130 <br /> Xylenes 104 69.3 - 138 <br /> TPH Gasoline 116 65.2 - 146 <br /> TPH Diesel 61 34.6 - 117 <br /> TRPH (418.1) N/A N/A <br /> OFFICE: (209) 667-5258 . FAX: (209) 667-2581 . BBS: (209) 667-4119 <br />