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Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> P.O. BOX 937 <br /> C o R P 0 R A T I O N HILMAR,CALIFORNIA 95324 <br /> 04109/99 QUALITY CONTROL REPORT DHS Certification 91400 <br /> Total Petroleum Hydrocarbons(TPH)Analysis Nancy Biedenweg, Lab Director�/ <br /> Client: GEOLOGICAL TECHNICS, INC. Date Received: 01/22/99 /1 <br /> 2741 RIVER RD. Date Started: : 01/25199 <br /> MODESTO, CA 95351 Date Complete: 01/27/99 <br /> ATTN: RAY KABLANOW <br /> Lab Report#: H9012213 Lab Sample#s: PH9011346 <br /> 1-in arity Check: <br /> BTEX Benzene 0.9993 TPH Gasoline 0.9996 <br /> Toluene 0.9995 TPH Diesel NIA <br /> Ethyl Benzene 0.9996 Motor Oil NIA <br /> Xylenes 0.9998 DIELECTRIC OIL NIA <br /> MTBE NIA <br /> Std % Re eatabili MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX NIA 98 98 93 106 <br /> TPH Gasoline 97 TPH Diesel NIA <br /> DIELECTRIC OIL NIA TPH Motor Oil NIA <br /> Matrix S ike Recoveries MS MSD RPD <br /> MTBE NIA NIA ERR <br /> BTEX Benzene MATRIX INTERFERENCE - ERR <br /> Toluene -- - ERR <br /> Ethyl Benzene ERR <br /> Xylenes - ERR <br /> TPH Gasoline - ERR <br /> TPH Diesel NIA NIA ERR <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A <3 u <3 u <3 ug/Kg ug/Kg <3 ugfKg <br /> TPH Gasoline <1 mg/Kg mg/KgTPH Diesel/MO N/A TRPH(418.1) N/A <br /> Lab Control Sample% Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 87 73.3 - 126 <br /> Toluene 87 73.0 - 118 <br /> Ethyl Benz 94 71.2 - 118 <br /> Xylenes 95 71.6 - 120 <br /> TPH Gasoline 127 68.0 - 150 <br /> TPH Diesel NIA <br /> TRPH (418.1) NIA NIA <br /> OFFICE: (209)667-5258 FAX: (209)667-2581 <br />