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Sherwood <br /> 8071 NORTH LANDER AVENUE <br /> Labs PO BOX 937 <br /> C O R P O R A T I O N <br /> HILMAR,CALIFORNIA 95324 <br /> 03/20/01. QUALITY CONTROL REPORT DHS Cert #1400 <br /> Total Petroleum. Hydrocarbons(TPH) Analysis <br />' Client GEOLOGICAL TECHNICS, INC. Date Received: 03/13/01 <br /> 2741 RIVER RD. Date Started- 03/15/01. <br /> MODESTO, CA 95351 Date Complete 03/19/01 <br />' ATTN: RAY KABLANOW <br /> Lab Report # H1031302 Lab Sample #:PH1030760-PH1030764 <br /> Linearity Cho <br />' STEX 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 0.9997 TRPH (418.1) N/A <br /> MTBE N/A <br /> std % Repeatability _ MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 109 101 99 103 <br /> TPH Gasoline 101 TPH Diesel N/A <br /> TRPH (418.1) N/A Motor Oil N/A <br /> ' Matrix Spike Recoveries MS MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 95 93 2 <br /> ' Toluene 94 96 2 <br /> Ethyl Benz 93 93 0 <br /> Xylenes 99 96 3 <br /> ' TPH Gasoline 96 91 5 <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 Dxesel/MO N/A TRPH(418 1) N/A <br /> 1 <br /> Lab Control Stele % Raaovaxy EPA Performance Acceptance Range <br /> BTEX Benzene 96 73 1 - 124 <br /> Toluene 91 73.6 120 <br /> Ethyl Benz 94 72 5 - 118 <br /> ' Xylenes 97 72 7 - 121 <br /> TPH Gasoline 107 82 4 117 <br /> TPH Diesel N/A N/A - N/A <br /> ' TRPH (418 1) N/A N/A <br /> Nanc a n- , Lab Di '0 7-5258 FAX (209)667-2581 <br />