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04/08/97 <br /> QUALITY CONTROL REPORT DHS Certification #1400 <br /> Volatile Analyses <br /> Client: Foothill Engineering Date Received: 03/26/97 <br /> 12793 Paddy Creek Lane Date Started: : 04/01197 <br /> Lodi, CA 95240 Date Complete: 04/02/97 <br /> ATTN: Ervin Ritenburg <br /> Lab Report#: H7032703 Lab Sample #s PH7031985-1994 <br /> Linear Check: <br /> BTEK Benzene 0.9999 TPH Gasoline 0.9998 <br /> Toluene 0.9998 TPH Diesel NIA <br /> Ethyl Benzene 0.9999 Motor Oil N/A <br /> Xylenes 0.9999 TRPH. (418.1) N/A <br /> MTBE 0.9994 <br /> Std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX 96 99 :99 102 102 <br /> TPN Gasoline 93 TPH Diesel N/A <br /> TRPH (418.1) N/A -TPH Motor Ciil N/A <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE 94.0 51:0 3.2 <br /> STEK Benzene 100.0 89:0 1.0 <br /> Toluene 96.0 95.0 1.0. <br /> Ethyl Benzene 104.0 99.0 4.9 <br /> Xylenes 1020 1020 0.0 <br /> TPH Gasoline 90.0 91:0 1.1 <br /> TPH Diesel N/A N/A <br /> TRPH 418.1 N/A <br /> Method Blank MTB8 Benzene Toluene Eth Benz Xylenes <br /> 6TEX <50vg/Kg <3 pg/Kg <3 Kq <3 pg/Kg pg/Kg <3Mg/Kg <br /> TPH Gasoline <1 mg/Kg TPH Diesel/MO N/A TRPH(418.1) N/A <br /> Lab Control Sam le% Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 97 37.0 - 151.0 <br /> Toluene 105 47.0 - I50.0 <br /> Ethyl Benz 108 38.9 - 1020 <br /> Xylenes 112 42.7 137.9 <br /> TPH Gasoline 112 35.0 130.1 <br /> TPH Diesel N/A 43.1 - 133.2 <br /> TRPH (4i9.1) NIA NIA <br /> Gloria Poling, Lab Director <br /> it 4 <br />