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Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> C 0 R P O R A T 1 O N PO BOX 937 <br />' HILMAR,CALIFORNIA 95324 <br /> 03/23/01 QUALITY CONTROL REPORT DHS Cert #1400 <br />' Total Petroleum Hydrocarbons(TPH) Analysis <br /> Client: GEOLOGICAL TECHNICS, INC Date Received 03/16/01 <br /> 2741 RIVER RD. Date Started 03/21/01 <br /> MODESTO, CA 95351 Date Complete: 03/22/01 <br /> ATTN• RAY KABLANOW <br />' Lab Report #: H1031605 Lab Sample #:PH1031605-PH1030919 <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 103 98 100 95 <br /> TPH Gasoline 102 TPH Diesel N/A <br /> TRPH (418.1) N/A Motor Oil N/A <br /> baatrxx spike Recoveries MS MSD RPD <br /> I MTBE N/A N/A NIA <br /> BTEX Benzene 96 98 2 <br /> Toluene 95 100 5 <br />' Ethyl Benz 99 84 14 <br /> Xylenes 101 99 2 <br /> TPH Gasoline 110 108 2 <br /> TPH Diesel N/A N/A N/A <br /> edethad clank MTBE Benzene Toluene Eth Benz Xylenes <br /> I 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 85 73 6 - 120 <br /> Ethyl Benz 97 72.5 118 <br /> Xylenes 105 72 7 - 121 <br /> TPH Gasoline 97 82.4 - 117 <br /> ITPH Diesel N/A N/A N/A <br />. 8.1) N/A N/A <br /> N 8�edenweg, La� Director <br /> EOFFICE (209)667-5258 FAX (209)667-2581 <br />