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Sherwood <br /> 8071 NORTH LANDER AVENUE <br /> Labs ' P.O. SOX 937 <br /> C o R P O R A T r 0 ry HILMAR,CALIFORNIA 95324 <br /> 04 09 O1 QUALITY CONTROL REPORT DHS Cert. #1400 <br /> Total Petroleum Hydrocarbons(TPH) Analysis <br /> Client: FOOTHILL ENGINEERING Date Received: 04/02/01 <br /> 12793 PADDY CREEK Date Started: 04/03/01 <br /> LODI, CA 95240 Date Complete: 04/06/01 <br /> ATTN: ERV RIFENBURG <br /> Lab Report #: H1040206 Lab Sample #:PH1040029-PH1040038 <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 /> std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 108 101 99 100 <br /> TPH Gasoline 102 TPH Diesel N/A <br /> TRPH (418.1) N/A Motor Oil N/A <br /> • <br /> ldatrix spike Recoveries KS MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 90 100 11 <br /> Toluene 91 98 7 <br /> Ethyl Benz 93 102 9 <br /> Xylenes 95 103 8 <br /> TPH Gasoline 108 108 0 <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 92 73.1 - 124 <br /> Toluene 91 73.6 - 120 <br /> Ethyl Benz 100 72.5 - 118 <br /> Xylenes 1.06 72.7 - 121 <br /> TPH Gasoline 91 82.4 - 117 <br /> TPH Diesel. N/A N/A - N/A <br /> • TRPH (418.1) N/A N/A <br /> � �r <br /> N f <br /> redenweg, ire or <br /> OFFICE: (209)667-5258 FAX: (209)667-2581 <br />