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Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> CORPORA TION P O BOX 937 <br /> HILMAR,CALIFORNIA 95324 <br /> 04/20/2000 QUALITY CONTROL REPORT DHS Certification 91400 <br /> Total Petroleum Hydrocarbone(TPH)Analysis Nancy Bledenweg, Lab Director ��u <br /> Client FOOTHILL ENGINEERING Date Received 04/03/2000 <br /> 12793 PADDY CREEK LN Date Started: : 0410412000 <br /> LODI, CA 93740 Date Complete. 04/06/2000 <br /> ATTN: ERVIN RIFENSURG <br /> Lab Report It H0040406 Lab Sample Vis PH0040118 <br /> Linear! Check <br /> BTEX Benzene 09990 TPH Gasoline 09988 <br /> Toluene 09998 TPH Diesel NIA <br /> Ethyl Benz 09983 Motor Oil NIA <br /> Xylenes 0.9998 STODDARD SOLVENTS NIA <br /> MTBE 09990 <br /> Std % Re eatabillMTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX 94 93 97 1D4 107 <br /> TPH Gasoline 110 TPH Diesel NIA <br /> STODDARD SOLVENTS NIA TPH Motor Oil NIA <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE 100 96 4.1 <br /> BTEX Benzene 103 96 7.0 <br /> Toluene 98 94 4 2 <br /> Ethyl Benzen 103 - 108 00 <br /> Xylenes 112 103 84 <br /> TPH Gasoline 107 109 19 <br /> TPH Diesel NIA NIA ERR <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX <2 ES1 C3 u L_ C 3 uL C3 pa C 3 <br /> TPH Gasoline <50!T& TPH DieseUMO N/A TRPH(4181) N/A <br /> Lab Control Sample%Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 98 731 - 124 <br /> Toluene 92 736 - 120 <br /> Ethyl Benz 100 72.5 - 118 <br /> Xylenes 106 72.7 - 121 <br /> TPH Gasoline 109 824 - 117 <br /> TPH Diesel NIA NIA - NIA <br /> TRPH (418.1) NIA NIA <br /> OFFICE (209)667-5258 FAX (209)667-2581 <br />