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l <br /> Sherwood <br /> (-Ilyz L abS 8071 NORTH LANDER AVENUE <br /> C O R P O R A T 1 0 N <br /> ZPO BOX 937 <br /> HILMAR.CALIFORNIA 95324 <br /> 04/09199 QUALITY CONTROL REPORT DHS Certification#1400 <br /> Total Petroleum Hydrocarbons(TPH)Analysis Nancy Biedenweg, Lab DirectorlA <br /> Client FOOTHILL ENGINEERING Date Received 04/05/99 <br /> 12793 PADDY CREEK LN Date Started 04106/99 <br /> LODI, CA 95240 Date Complete 04/09/99 <br /> ATTN ERVIN RIFENBURG <br /> Lab Report#- H9040507 _ Lab Sample lis PH9040100-114 <br /> Linearity Check <br /> BTEX Benzene 09996 TPH Gasoline 09998 <br /> Toluene 09996 TPH Diesel NIA <br /> Ethyl Benzene 09999 Motor Oil NIA <br /> Xylenes 09993 TRPH (418 1) NIA <br /> MTBE NIA <br /> Std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX NIA e8 101 105 97 <br /> TPH Gasoline 107 TPH Diesel NIA <br /> TRPH (418 1) NIA TPH Motor Oil NIA <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE NIA NIA ERR <br /> BTEX Benzene 86 89 34 <br /> Toluene 93 101 82 <br /> Ethyl Benzene Be 94 6 6 <br /> Xylenes 92 93 1 1 <br /> TPH Gasoline 91 90 11 <br /> TPH Diesel NIA NIA ERR <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A < 3 u < 3 u < 3 u <3 u <br /> TPH Gasoline <50 ue& TPH Diesel/MO N/A TRPH(418 1) N/A <br /> Lab Control Sam le % Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 91 731 - 124 <br /> Toluene 98 736 - 120 <br /> Ethyl Benz 107 725 - 118 <br /> Xylenes 106 727 - 121 <br /> TPH Gasoline 132 680 - 150 <br /> TPN Diesel NIA NIA NIA <br /> TRPH (418 1) NIA NIA <br /> OFFICE (209)667-5258 FAX (209)667-2581 <br />