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Sherwood <br /> �F <br /> Labs 8071 NORTH LANDER AVENUE <br /> C 0 P P 0 Fi A r / O N P.O. BOX 937 <br /> HILMAR,CALIFORNIA 95324 <br /> 05/21/01 QUALITY CONTROL REPORT DHS Cert. #1400 <br /> Total Petroleum Hydrocarbons(TPH) Analysis <br /> Client: GEOLOGICAL TECHNICS, INC. Date Received: 05/16/01 <br /> 2741 RIVER RD. Date Started: 05/17/01 <br /> MODESTO, CA 95351 Date Complete: 05/21/01 <br /> ATTN: RAY KABLANOW <br /> �• Lab Report #: H1051602 Lab Sample #!PH1050599-PH1050605 <br /> Linearity Cheak: <br /> BTEX Benzene 0.9995 TPH Gasoline 0.9997 <br /> Toluene 0.9985 TPH Diesel N/A <br /> Ethyl Benz 0.9997 Motor Oil N/A <br /> Xylenes 0.9988 TRPH (418.1) N/A <br /> MTBE N/A <br /> L. std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 104 101 100 110 <br /> TPH Gasoline 104 TPH Diesel N/A <br /> 'I•../ TRPH (41.8.1) N/A Motor Oil N/A <br /> Wtrix spire Recavaries MS MSD RPD <br /> t.M MTBE N/A NIA N/A <br /> BTEX Benzene 99 99 0 <br /> Toluene 96 95 1 <br /> 4.8 Ethyl Benz 102 95 7 <br /> Xylenes 103 95 8 <br /> TPH Gasoline 101 92 9 <br /> 4.5 TPH Diesel N/A N/A N/A <br /> LA 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) NIA <br /> Ls <br /> Lab Control Sample % Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 92 73.1 - 124 <br /> Toluene 92 73.6 - 120 <br /> Ethyl Benz 97 72.5 - 118 <br /> Xylenes 104 72.7 - 121 <br /> TPH Gasoline 103 82.4 - 117 <br /> .i/ TPH Diesel N/A N/A - NIA <br /> TRPH (418.1) N/A N/A <br /> y Wedenweg, L Di . 20 )667-5258 FAX: (209)667-2581 <br />