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Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> c o P 0 P A T r 0 N RO. BOX 937 <br /> HILMAR,CALIFORNIA 95324 <br /> 10/26/00 QUALITY CONTROL REPORT DHS Cert. #1400 <br /> Total Petroleum Hydrocarbons(TPH) Analysis <br /> ~ Client: GEOLOGICAL TECHNICS, INC. Date Received: 10/20/00 <br /> 2741 RIVER RD. Date Started: 10/23/00 <br /> MODESTO, CA 95351 Date Complete: 10/26/00 <br /> ATTN: RAY KABLANOW <br /> Lab Report #: H0102008 Lab Sample #:PHO100726-PH0100732 <br /> a.. <br /> Linearity Check: <br /> BTEX Benzene 0.9983 TPH Gasoline 1.0000 <br /> Toluene 0.9995 TPH Diesel N/A <br /> i, Ethyl Benz 0.9978 Motor Oil N/A <br /> Xylenes 0.9987 TRPH (418.1) N/A <br /> MTBE 0.9975 <br /> Std Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX 105 100 97 104 98 <br /> TPH Gasoline 97 TPH Diesel N/A <br /> TRPH (418.1) N/A Motor Oil N/A <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE 110 102 g <br /> BTEX Benzene 95 94 1 <br /> Toluene 102 95 7 <br /> Ethyl Benz 95 87 9 <br /> Xylenes 93 92 1 <br /> TPH Gasoline 88 90 2 <br /> TPH Diesel N/A N/A N/A <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX <50 ug/Kg <3 ug/Kg <3 ug/Kg <3 ug/Kg <3 ug/Kg <br /> TPH Gasoline <1 mg/Kg Diesel/MO N/A TRPH(418.1) N/A <br /> Lab Control Sample k Reaevexy EPA Performance Acceptance Range <br /> BTEX Benzene 104 73.1 - 1.24 <br /> Toluene 98 73.6 - 120 <br /> Ethyl Benz 103 72.5 - 118 <br /> Xylenes 101 72.7 - 121 <br /> TPH Gasoline 91 82.4 - 117 <br /> �.. TPH Diesel N/A N/A - N/A <br /> TRPH (418.1) N/A N/A <br /> N a Bi denwe Lab area o <br /> OFFICE: (209)667-5258 FAX:(209)667-2581 <br />