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Sherwood <br /> ' Labs bs 8071 NORTH LANDER AVENUE <br /> CORPORA T ! ON <br /> PO BOX 937 <br /> ' HILMAR, CALIFORNIA 95324 <br /> 10/04/00 QUALITY CONTROL REPORT DHS Cert. 01400 <br /> Total Petroleum Hydrooasbons(TPH) Armlysms <br /> Client: GEOLOGICAL TECHNICS, INC Date Received- 09/27/00 <br /> 2741 RIVER RD. Date Started: 09/29/00 <br /> ' MODESTO, CA 95351 Date Complete: 10/03/00 <br /> ATTN: RAY AABLANOW <br /> Lab Report #: H0092705 Lab Sample #:PH0091.290-PH0091298 <br />' Linearity Check. <br /> BTEX Benzene 0.9992 TPH Gasoline 0.9998 <br /> Toluene 0-9989 TPH Diesel N/A <br /> Ethyl Benz 0.9985 Motor Oil N/A <br /> Xylenes 0.9990 TRPH (418 1) N/A <br /> MTBE N/A <br /> Std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 99 101 98 99 <br /> TPH Gasoline 111 TPH Diesel N/A <br /> TRPH (418.1) N/A Motor Oil N/A <br /> Matrix Spike Recoverieu MS NSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 101 101 0 <br /> Toluene 103 104 1 <br /> Ethyl Benz 102 102 0 <br /> Xylenes 99 99 0 <br /> TPH Gasol3-ne 97 95 2 <br /> TPH Diesel N/A N/A N/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 /> 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 82 72.1 124 <br /> Toluene 96 72.E - 120 <br /> Ethyl Benz 102 73.5 - 118 <br /> Xylenes 105 73.7 - 121 <br />' TPH Gasoline 108 82.4 - 117 <br /> TPH Diesel N/A N/A N/A <br /> . TRPH (418.1) N/A f l} N/A <br /> Nancy Biedenweg, Lab Direct f <br /> OFFI (209)667-5258 FAX (209)667-2581 <br />