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Sherwood <br /> 8071 NORTH LANDER AVENUE <br /> ffZ Labs P.O. BOX 937 <br /> C 0 R P O R A T r 0 N HILMAR, CALIFORNIA 95324 <br /> 01/04/01 QUALITY CONTROL REPORT DHS Cert. #1400 <br /> Total Petroleum Hydrocarbons(TPH) Analysis <br /> Client: FOOTHILL ENGINEERING Date Received: 12/28/00 <br /> 12793 PADDY CREEK Date Started: 12/29/00 <br /> LODI, CA 95240 Date Completes: 01/03/01 <br /> ATTN: ERV RIFENBURL' <br /> Lata Report #: H0122802 Lab Sample #:PH0120955-PHO120963 <br /> Linearity Check: <br /> BTEX Benzene 0.9994 TPH Gasoline 0.9999 <br /> Toluene 0.9995 TPH Diesel N/A <br /> Ethyl Benz 0.9992 Motor Oil N/A <br /> Xylenes 0.9991 TRPH (418.1) N/A <br /> MTBE N/A <br /> std % Hepaatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 102 102 105 104 <br /> TPH Gasoline 99 TPH Diesel N/A <br /> TRPH (418.1) N/A Motor Oil N/A <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 112 97 14 <br /> Toluene 102 103 1 <br /> Ethyl BenzSpikp, ins g n i f i c a n t r e la ve to sample concentration <br /> Xylenes Spike insignificant relative to sample concentration <br /> TPH Gasoline 79 . 74 7 <br /> TPH Diesel N/A' N/A N/A <br /> 1Sathod 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 95 73.1 - 124 <br /> Toluene 99 73.6 - 120 <br /> Ethyl Benz 88 72.5 - 118 <br /> Xylenes 100 72.7 - 121 <br /> TPH Gasoline 98 82.4 - 117 <br /> TPH Diesel N/A N/A - N/A <br /> TRPH 18.1) N/A N/A <br /> Nancy B denxeg, Lab Di tar <br /> OFFICE: (209)667-5258 FAX: (209) 667-2581 <br />