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Sherwood <br /> ��L Labs 8071 NORTH LANDER AVENUE <br /> C O R P O R A T 1 0 N P.O.BOX 937 <br /> HILMAR,CALIFORNIA 95324 <br /> 03/27/01 <br /> QUALITY CONTROL REPORT DHS Cert. #1400 <br /> Total Petroleuta Hydrocarbons(TPM) Analysis <br /> L. <br /> Client: GEOLOGICAL TECHNICS, INC. Date Received: 03/19/01 <br /> 2741 RIVER RD. Date Started: 03/23/01 <br /> MODESTO, CA 95351 Date Complete: 03/26/01 <br /> ATTN: RAY KABLANOW <br /> Lab Report #: R1031923 Lab Sample #:PH1031128-PH1031133 <br /> Linearity Check: <br /> BTEX Benzene 0.9998 TPH Gasoline 0.9992 <br /> Toluene 0.9996 TPH Diesel N/A <br /> �-• Ethyl Benz 0.9994 Motor Oil N/A <br /> Xylenes 0.9992 TRPH (418.1) N/A <br /> MTBE N/A <br /> rwe <br /> std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 101 98 100 96 <br /> TPH Gasoline 103 TPH Diesel N/A <br /> TRPH (418.1) N/A Motor Oil N/A <br /> Matrix Spike Reeoveria� MS MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 104 100 4 <br /> Toluene 102 100 2 <br /> Ethyl Benz 101 97 4 <br /> +.. Xylenes 99 101 2 <br /> TPH Gasoline 94 93 1 <br /> TPH Diesel N/A N/A N/A <br /> a� <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A <.3 ug/L <.3 ug/L <.3 ug/L <.3 ug/L <br /> 4 TPH Gasoline <50 ug/L Diesel/MO N/A TRPH(418.1) N/A <br /> Lab Control Sample % Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 103 73.1 - 124 <br /> Toluene 101 73.6 - 120 <br /> L.. Ethyl Benz 98 72.5 - 118 <br /> xylenes 101. 72.7 - 121 <br /> TPH Gasoline 104 82.4 - 117 <br /> t. TPH Diesel N/A N/A - N/A <br /> TRPH (4 1) N/A N/A <br /> V <br /> 127Gr <br /> +- Nancy Bie we , Lab Director <br /> OFFICE: (209)667-5258 FAX: (209) 667-2581 <br /> LN <br />