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Sherwood <br /> ..,, Labs 8071 NORTH LANDER AVENUE <br /> C 0 R P 0 R A T 1 0 N P.D.80X 937 <br /> HILMAR -- ORNIA 95324 <br /> 02!28/01 <br /> QUALITY CONTROL REPORT DHS Cert. #1400 <br /> Total Petroleum Hydrocarbons(TPH) Analysis <br /> Client: GEOLOGICAL TECHNICS, INC. Date Received: 02/23/01 <br /> 2741 RIVER RD. Date Started: 02/26/01 <br /> ar MODESTO, cA 95351 Date complete: 02/28/01 <br /> ATTN: RAY KABLANOW <br /> Lab Report #: H-1022602 Lab Sample # PH1020678-PH1020684 <br /> Linearity Check: <br /> BTEX Benzene 0.9992 TPH Gasoline 0.9992 <br /> Toluene 0.9992 TPH Diesel N/A <br /> Ethyl Benz 0.9994 Motor Oil N/A <br /> Xylenes 1.0000 TRPH (418.1) N/A <br /> MTBE N/A <br /> std k Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 98 103 102 102 <br /> TPH Gasoline 104 TPH Diesel N/A <br /> TRPH (418.1) N/A Motor ail N/A <br /> Matrix spike Reooveries MS MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 94 96 2 <br /> V <br /> Toluene 93 97 4 <br /> Ethyl Benz 93 93 0 <br /> Xylenes 100 97 3 <br /> TPH Gasoline 87 90 3 <br /> TPH Diesel N/A N/A N/A <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A <.3 ug/L <.3 ug/L <.3 ug/L <.3 ug/L <br /> TPH Gasoline <50 ug/L Diesel/MO N/A TRPH(418.1) N/A <br /> Lab Control sample % Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 96 73.1 - 124 <br /> Toluene 95 73.6 - 120 <br /> Ethyl Benz 103 72.5 - 118 <br /> xylenes 105 72.7 - 121 <br /> TPH Gasoline 94 82.4 - 117 <br /> TPH Diesel N/A 76.5 - 136 <br /> TRPH (418.1) N/A N/A <br /> t.. N ay B'edenweg, Lab Dire ar <br /> OFFICE:(209)667-5258 FAX: (209)667-2581 <br />