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Sherwood <br /> DER AVENUE <br /> 8071 NORTH LAN <br /> Labs <br /> CORPORATION P.O. BOX 937 <br /> HILMAR, CALIFORNIA 95324 <br /> 12102/99 QUALITY CONTROL REPORT DHS Certification #1400 <br /> Total Petroleum Hydrocarbons(TPH)Analysis Nancy Bledenweg, Lab Director <br /> Client: FOOTHILL ENGINEERING Date Received: 11/24/99 kd <br /> 12793 PADDY CREEK LN Date Started: 11/30199 <br /> LODI, CA 95240 Date Complete: 12101/99 <br /> ATTN: ERVIN RIFENBURG <br /> Lab Report it H9112405 Lab Sample#s: PH9110978-PH9110981 <br /> Lineari Check: <br /> BTEX Benzene 0.9993 TPH Gasoline 0.9999 <br /> Toluene 0.9992 TPH Diesel NIA <br /> Ethyl Benzene 0.9992 Motor Oil NIA <br /> Xylenes 0.9997 STODDARD SOLVENTS NIA <br /> MTBE 0.9998 <br /> SW °/.Repeatabilit <br /> y MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX 102 98 101 98 107 <br /> TPH Gasoline 106 TPH Diesel NIA <br /> . STODDARD SOLVENTS N/A TPH Motor Oil NIA <br /> Matrix Spike Recoveries MS MSD RPD <br /> MTBE 97 - 99 2.0 <br /> BTEX Benzene 99 103 4.0 <br /> Toluene 94 98 4.2 <br /> Ethyl Benzene 98 104 5.9 <br /> Xylenes 103 108 4.7 <br /> TPH Gasoline 96 98 2.1 <br /> TPH Diesel NIA NIA ERR <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX <2 ug/L. <.3 yB& <.3 ugLL <.3 <.3 u <br /> TPH Gasoline <50 ug/L_ TPH Diesel/MO NIA TRPH(418.1) NIA <br /> Lab Control Sample% Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 88 73.1 - 124 <br /> Toluene 85 73.6 - 120 <br /> Ethyl Benz 88 72.5 - 118 <br /> Xylenes 94 72.7 - 121 <br /> • TPH Gasoline 103 - 82.4 - 117 <br /> TPH Diesel NIA NIA NIA <br /> TRPH (418.1) NIA NIA <br /> OFFICE: (209)667-5258 FAX: (209)667-2581 <br />