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Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> . CORPORA TION PO 80X 937 <br /> HILMAR CALIFORNIA 95324 <br /> 09/22/00 QUALITY CONTROL REPORT DHS cert. 01400 <br /> Total Petroleum Hydrooarbons(TPH) Analysis <br /> Clment: FOOTHILL ENGINEERING Date Racezved: 00/15/00 <br /> 12793 PADDY CREEK Date Started: 09/15/00 <br /> LODI, CA 05240 Date Caeaploto: 00/21/00 <br /> ATTN: ERV RIFENBURG <br /> Lab Report 0: H0091501 Lab Sample #!PH0090720-PH0090724 <br /> Linearity Check <br /> BTEX Benzene 0.9992 TPH Gasolane 1.0000 <br /> Toluene 0.9989 TPH Diesel 0.9996 <br /> Ethyl Benz 0.9985 Motor Oil 0.9998 <br /> xylenes 0.9990 TRPH (418.1) N/A <br /> MDSE N/A <br /> std % Repeatabsisty WBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 107 107 106 113 <br /> TPH Gazolane 107 TPH Diesel 99 <br /> TRPH (418.1) N/A Motor oil 112 <br /> satrzx Spike Recoverieā–  MS MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 99 100 1 <br /> Toluene 103 103 0 <br /> Ethyl Benz 1.05 108 3 <br /> Xylenes 97 103 6 <br /> TPH Gasoline 108 113 5 <br /> TPH Diesel 108 105 3 <br /> 1[ethod Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEC N/A <3 ug/Kg <3 ug/Kg <3 ug/Kg <3 ug/Kg <br /> TPH Gasolxne <1 mg/Kg D1esel/MD <5 mg/Kg TRPH(418.1) N/A <br /> Lala Control sample % Recovery EPA Performance Acceptance Range <br /> BTEC Benzene 92 73.1 - 124 <br /> Toluene 96 73.6 -- 120 <br /> Ethyl Benz 94 72.5 - 118 <br /> XyyI arubo 106 72.7 - 121 <br /> TPH Gasolum 108 82.4 - 117 <br /> TPH Diesel 106 76.5 - 136 <br /> TRPH (418 1) N/A N/A <br /> Nancy Biedenweg, Lab Director <br /> OFFICE (20 667-5258 FAX (209) 667-2581 <br />