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&S1 Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> C O R P O R A T 1 0 N PO BOX 937 <br /> HILMAR CALIFORNIA 95324 <br /> 04115/99 QUALITY CONTROL REPORT DHS Certification <br /> Total Petroleum Hydrocarbons(TPH) Analysis Nancy Biedenweg, Lab Director L IN'6 <br />' Client GEOLOGICAL TECHNICS, INC Date Received 04109/99 <br /> 2741 RIVER RD Date Started 04109/99 <br />' MODESTO, CA 95351 Date Complete 04105199 <br /> ATTN RAY KABLANOW <br /> Lab Re ort# H9040901 Lab Sample#s PH9040310-322 <br />' <br /> Linearity Check <br /> BTEX Benzene 09996 TPH Gasoline 09998 <br /> Toluene 09996 TPN Diesel NIA <br />' Ethyl Benzene 09999 Motor Oil NIA <br /> Xylenes 09993 DIELECTRIC OIL NIA <br /> MTBE 09992 <br />' Std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX 104 97 96 104 100 <br /> TPH Gasoline 90 TPH Diesel NIA <br /> DIELECTRIC OIL NIA TPH Motor Oil NIA <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE 118 110 70 <br /> BTEX Benzene 100 98 20 <br /> Toluene I'll 110 09 <br /> Ethyl Benzene 106 110 37 <br /> Xylenes 100 100 00 <br /> TPH Gasoline 81 83 24 <br />' TPH Diesel NIA NIA ERR <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX <50u <3u <3u K Ciu <3u <br /> TPH Gasoline <1 m TPH DieselfMO <51lagVc <br /> g TRPH(418 1) NIA <br /> Lab Control Sample % Recove EPA Performance Acceptance Range <br /> BTEX Benzene 99 731 - 124 <br /> IToluene 68 736 - 120 <br /> Ethyl Benz 96 725 - 118 <br /> I Xylenes 97 727 - 121 <br /> TPH Gasoline 126 680 150 <br /> TPH Diesel NIA N/A - NIA <br /> TRPH (418 1) NIA NIA <br /> OFFICE (209)667-5258 FAX (209)667-2581 <br />