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04/08/97 <br /> OUAUTY CONTROL REPORT DHS Certification #1400 <br /> Volatile Anslyses <br /> Client: Foothill Engineering Date Received; 03126197 <br /> 12793 Paddy Creek Lane Date Started: : 04/07/87 <br /> Lodi, CA 95240 Date Complete: 04/08197 <br /> ATTN: Ervin Rifenburg <br /> Lab Report#: H7040302 Lab Sample #s PH7040370 <br /> Linearity Chock: <br /> BTEX Benzene 0.9999 TPN Gasoline MOM <br /> Toluene M9998 TPH Diesel NIA <br /> Ethyl Benzene 0.9999 Motor Oil NIA <br /> Xylenes 0.9999 TRPH (418.1) NIA <br /> MTBE 0.9994 <br /> Std % Repests bIIi MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX 98 105 102 106 109 <br /> TPH Gasoline 104 TPH Diesel N/A <br /> TRPH (418.1) NIA TPN Motor Oil NIA <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE 96.0 1398.0 21 <br /> BTEX Benzene 100.0 499.0 1.0 <br /> Toluene 101.0 980 &0 <br /> Ethyl Benzene 1020 980 4.0 <br /> Xylenes 101.0 100.0 1.0 <br /> TPH Gasoline 87.0 86.0 1.2 <br /> I� TPH Diesel NIA N/A <br /> TRPH 41&1 N/A <br />! Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX <50 22ZKg <3 pg/Kq <3 pg/Kq <3 K <3 K <br /> TPH Gasoline <1 mg/Kg_TPH Diesel/MO N/A TRPH(41&1) N/A <br /> Lab Control Sample % Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 85 37.0 - 151.0 <br /> Toluene 104 47.0 - 150.0 <br /> Ethyl Benz 117 36.9 - 102.0 <br /> Xylenes 122 427 * 137.9 <br /> 4 TPH Gasoline 118 350 - 130.1 <br /> TPH Diesel NIA 45.1 - 135.2 <br /> TRPH (418.1) NIA NIA <br /> i <br /> Gloria Poling, Lab Director <br />