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07/18/96 <br /> QUALITY CONTROL REPORT DWS Certification #1400 <br /> Volatile Analyses <br /> Client: Foothill Engineering Date Received: 07/05196 <br /> 12793 Paddy Creek Lane Date Started: : 07/09/96 <br /> Lodi, CA 95240 Date Complete: 07/10/96 <br /> ATTN. Ervin Rifenburg <br /> Lab Report #: H6070503 Lab Sample #a PH6070721-723 <br /> Linearity Check: <br /> BTEX Benzene 0.9989 TPH Gasoline 0.9998 <br /> Toluene 0.9993 TPH Diesel N/A <br /> Ethyl Benzene 0.9996 Motor Oil N/A <br /> Xylenes 0.9989 TRPH (418.1) N/A <br /> MTBE N/A <br /> Std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 96 101 102 94 <br /> TPH Gasoline 99 TPH Diesel N/A <br /> TRPH (418.1) N/A TPH Motor Oil NIA <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE N/A N/A ERR <br /> BTEC Benzene 99.0 96.0 3.1 <br /> Toluene 100.0 101.0 1.0 <br /> Ethyl Benzene 105.0 102.0 2.9 <br /> Xylenes 107.0 110.0 2.8 <br /> TPH Gasoline 91.0 88.0 3.4 <br /> TPH Diesel N/A N/A <br /> TRPH 418.1 NIA <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX NIA c.3 ug/L t.3 ug/L C.3 up/L c.3 ug/L <br /> TPH Gasoline <50 u L TPH Diesel/M0 N/A TRPH(418.1) N/A <br /> Lab Control Sample% Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 101 37.0 - 151.0 <br /> Toluene 108 47.0 - 150.0 <br /> Ethyl Benz 101 36.9 - 162.0 <br /> Xylenes 126 42.7 - 137.9 <br /> TPH Gasoline 102 35,0 - 130.1 <br /> TPH Diesel N/A 45.1 - 135.2 <br /> TRPH (418.1) N/A N/A <br /> Gloria Paling, Lab Director <br />