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Sherwood <br /> • 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 /> 05/18/01 QUALITY CONTROL REPORT DHS Cert. #1400 <br /> Total Petroleum Hydrocarbons(TPH) Analysis <br /> Client: FOOTHILL ENGINEERING Date Received: 05/14/01 <br /> 12793 PADDY CREEK Date Started: 05/14/01 <br /> LODI, CA 95240 Date Complete: 05/18/01 <br /> ATTN: ERV RIFENBURG <br /> Lab Report #: H1051411 Lab Sample #;PH1050527-PH1050530 <br /> Linearity Check: <br /> BTEX Benzene 0.9995 TPH Gasoline 0.9997 <br /> Toluene 0.9985 TPH Diesel 0.9998 <br /> Ethyl Benz 0.9997 Motor Oil 0.9998 <br /> Xylenes 0.9988 Dielectric 0.9991 <br /> MTBE N/A <br /> Std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 99 97 103 103 <br /> TPH Gasoline 98 TPH Diesel 108 <br /> . TRPH (418.1) N/A Motor 0i1 98 <br /> Dielectric 96 <br /> Matrix Spike Recoveries Ms MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 101 99 2 <br /> Toluene 100 95 5 <br /> Ethyl Benz 107 97 10 <br /> Xylenes 102 103 1 <br /> TPH Gasoline 91 95 4 <br /> TPH Diesel 101 98 3 <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A <3 ug/Kg <3 ug/Kg <3 ug/Kg <3 ug/Kg <br /> TPH Gasoline <1 mg/Kg Diesel/MO <5 mg/Kg TRPH(418.1) N/A <br /> Lab Control Sample Recovery EPA Performance Acceptance Range <br /> BTEC Benzene 103 73.1 - 124 <br /> Toluene 97 73.5 - 120 <br /> Ethyl Benz 100 72.5 - 118 <br /> Xylenes 111 72.7 - 121 <br /> TPH Gasoline 97 82.4 - 117 <br /> TPH Diesel 100 75.8 - 124 <br /> TRPH (418.1) N/A N/A <br /> Na'�nB <br /> OFFICE: (209)667-5258 FAX: (209)667-2581 <br />