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Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> C O R P O R A T 1 0 N PO BOX 937 <br /> HILMAR,CALIFORNIA 95324 <br /> 05/23/01 QUALITY CONTROL REPORT DHS Cert. 01400 <br /> Total Petroleum Hydrocarbons(TPH) Analysxs <br /> Client: GEOLOGICAL TECHNICS, INC. Date Received: 05/18/01 <br /> 2741 RIVER RD. Date Started: 05/18/01 <br /> WDESTO, CA 95351 Date Complete: 05/23/01 <br /> ATTN: JOE ANGULO <br /> Lain Report #: H1051804 Lab Sample #sPH1050731-PH1050737 <br /> Linearity Cheat <br /> ' BTEX Benzene 0.9995 TPH Gasoline 0.9997 <br /> Toluene 0.9985 TPH Diesel N/A <br /> Ethyl Benz 0.9997 Motor Ozl N/A <br /> ' Xylenes 0.9988 TRPH (418.1) N/A <br /> MTBE N/A <br /> ' std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 98 95 100 103 <br /> TPH Gasoline 98 TPH Diesel N/A <br /> TRPH (418.1) N/A Mator 03.1 N/A <br /> ' matrix spike Raeoverzen MS MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 108 113 5 <br /> ' Toluene 102 101 1 <br /> Ethyl Benz 97 98 1 <br /> Xylenes 101 102 1 <br /> ' TPH Gasoline 102 103 1 <br /> TPH Diesel N/A N/A N/A <br /> ' Kethod Blank MTBE Benzene Toluene Eth Benz Xyletnes <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 /> ' La3s Control Sample $ Recovery EPA Performance Acceptance Range <br /> ' BTEX Benzene 106 73.1 - 124 <br /> Toluene 101 73 6 120 <br /> Ethyl Benz 103 72 5 - 118 <br /> Xylenes 110 72.7 121 <br /> TPH Gasoline 103 82.4 117 <br /> TPH Diesel N/A N/A - N/A <br /> "PH (418.1) N/A N/A <br /> 09)667-5258 FAX (209)667-2581 <br />