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03109/99 QUALITY CONTROL REPORT DHS Certification #1400 <br />Total Petroleum Hydrocarbons(TPH) Analysis Nancy Biedenweg, Lab Director <br />Client: GEOLOGICAL TECHNICS, INC. Date Received: 02104/99 <br />2741 RIVER RD. Date Started: : 02104/99 <br />MODESTO, CA 95351 Date Complete: 02/05199 <br />ATTN: RAY KABLANOW <br />Lab Report #. H9020402 Lab Sample #s: PHS020114-115 <br />1-ine rity Check: <br />BTEX Benzene <br />0.9943 <br />Toluene <br />0.9995 <br />Ethyl Benzene <br />0.9996 <br />Xylenes <br />0.9998 <br />MTBE <br />NIA <br />Std % Re eatabili <br />BTEX <br />TPH Gasoline <br />DIELECTRIC OIL <br />Matrix Spike Recoveries <br />MTBE <br />BTEX Benzene <br />Toluene <br />Ethyl Benzene <br />Xylenes <br />TPH Gasoline <br />TPH Diesel <br />Method Blank <br />BTEX <br />TPH Gasoline <br />MTBE Benzene <br />NIA 93 <br />103 <br />N/A <br />MS <br />NIA <br />4n4 <br />11b <br />inn <br />93 <br />MIA <br />TPH Gasoline <br />0.9998 <br />TPH <br />Diesel <br />NIA <br />- 118 <br />Motor Oil <br />NIA <br />DIELECTRIC <br />OIL <br />NIA <br />- NIA <br />Toluene <br />Eth Benz <br />Xylenes <br />94 <br />99 <br />105 <br />TPH Diesel <br />NIA <br />TRPH <br />TPH Motor Oil <br />N/A <br />MSD <br />RPD <br />NIA <br />ERR <br />105 <br />3.9 <br />120 <br />3.4 <br />106 <br />5.8 <br />118 <br />6.1 <br />86 <br />7.8 <br />NIA <br />ERR <br />MTBE Benzene <br />N/A <3 mg/Kg <br /><1 m TPH Diesel/MO <br />Lab Control Sample % Recovery <br />- 126 <br />BTEX <br />Benzene <br />86 <br />- 118 <br />Toluene <br />87 <br />68.0 <br />Ethyl Benz <br />94 <br />- NIA <br />Xylenes <br />100 <br />TPH <br />Gasoline <br />122 <br />TPH <br />Diesel <br />NIA <br />TRPH <br />(418.1) <br />NIA <br />Toluene Eth Benz Xylenes <br /><3 m <3 <3 m <br />N/A TRPH(418.1) N/A <br />EPA Performance Acceptance Range <br />73.3 <br />- 126 <br />73.0 <br />- 118 <br />71.2 <br />- 118 <br />71.6 <br />- 120 <br />68.0 <br />- 150 <br />NIA <br />- NIA <br />NIA <br />