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Sherwood <br /> 8071 NORTH LANDER AVENUE <br /> Labs P.O.BOX 937 <br /> C O R P O R A T 1 0 N HILMAR CALIFORNIA 95324 <br /> 03124/99 QUALITY CONTROL REPORT DHS Certification #1400 <br /> Total Petroleum Hydrocarbons(TPH.)Analysis Nancy Biedenweg, Lab Director <br /> Client: GEOLOGICAL TECHNICS, INC. Date Received: 03117199 <br /> 2741 RIVER RD. Date Started: 03118199 <br /> MODESTO, CA 95351 Date Complete: 03123/99 <br /> ATTN: RAY KABLANOW <br /> Lab Report It H9031802 Lab Sample#s: PH9030633-PH9030634 <br /> Linearity Check: <br /> BTEX Benzene 0.9997 TPH Gasoline 0.9998 <br /> Toluene 0.9994 TPH Diesel NIA <br /> Ethyl Benzene 0.9996 Motor ON NIA <br /> Xylenes 0.9989 DIELECTRIC OIL NIA <br /> MTBE NIA <br /> Std % Re eatabili MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX NIA 99 99 104 104 <br /> TPH Gasoline 103 TPH Diesel NIA <br /> DIELECTRIC OIL NIA TPH Motor Oil NIA i <br /> Matrix Spike Recovertesj MS MSD RPD <br /> MTBE NIA NIA ERR <br /> BTEX Benzene 99 100 1.0 <br /> Toluene 104 102 1.9 <br /> Ethyl Benzene 108 106 1.9 <br /> Xylenes 102 101 1.0 <br /> i <br /> TPH Gasoline 102 1.01 1.0 <br /> TPH Diesel N/A NIA ERR <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX NIA <3 u <3 u <3 ug/K&ug/K& <3 uVZLg <br /> TPM Gasoline <1 mgtKg TPH DiesellMO NIA TRPH(418.1) NIA <br /> Lab Control Sample % Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 105 73.3 - 126 <br /> Toluene 105 73.0 - 118 <br /> Ethyl Benz 105 71.2 - 118 <br /> Xylenes 108 71.6 - 120 <br /> TPH Gasoline 130 68.0 - 150 <br /> TPH Diesel NIA 76.5 - 136.0 <br /> TRPH (418.1) NIA NIA <br /> OFFICE: (209)667-5258 FAX=(209)667-2581 <br />