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Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> C 0 R P 0 R A T 1 0 N P.O. 80X 937 <br /> HILMAR, CALIFORNIA 95324 <br /> 03/30/01 QUALITY CONTROL REPORT DHS Cert. #1400 <br /> Total Petroleum Hydrooarborae(TPH) Analymlm <br /> Client: FOOTHILL ENGINEERING Date Received: 03/23/01 <br /> 12793 PADDY CREEK Date Started: 03/28/01 <br /> LODI, CA 95240 Date Complete: 03/29/01 <br /> ATTN: ERV RIP'ENBURG <br /> Lab Report *: H1032313 Lab Sample #-PH1031313-PH1O31317 <br /> Linearity Check: <br /> BTEX Benzene 0.9998 TPH Gasoline 0.9992 <br /> Toluene 0.9996 TPH Diesel N/A <br /> Ethyl Benz 0.9994 Motor Oil N/A <br /> Xylenes 0.9992 TRPH (418.1) N/A <br /> MTBE N/A <br /> std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 99 98 93 94 <br /> TPH Gasoline 104 TPH Diesel N/A <br /> TRPH (418.1) N/A Motor Oil N/A <br /> ldatrix Spike Recoveries NS MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 98 96 2 <br /> Toluene 94 93 1 <br /> Ethyl Benz 98 98 0 <br /> Xylenes 96 96 0 <br /> TPH Gasoline 98 96 2 <br /> TPH Diesel N/A N/A N/A <br /> method Hlank MTBE Benzene Toluene Eth Benz Xylenes <br /> STEX N/A <3 ug/Kg <3 ug/Kg <3 ug/Kg <3 ug/Kg <br /> TPH Gasoline <1 mg/Kg ' Diesel/MO N/A TRPH(418.1) N/A <br /> Lala control sample 9d [recovery EPA Performance Acceptance Range <br /> BTEX Benzene 102 73.1 - 124 <br /> Toluene 96 73.6 - 120 <br /> Ethyl Benz 103 72.5 - 118 <br /> Xylenes 114 72.7 - 121 <br /> TPH Gasoline 1.01 82.4 - 117 <br /> TPH Diesel N/A N/A - N/A <br /> TRPH (418.1) N/A N/A <br /> 2 y Bi denweq, Lab Di ctor <br /> OFFICE: (209)667-5258 FAX: (209)667-2581 <br />