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Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> P.O.BOX 937 <br /> C O R P 0 R A T I O N <br /> HILMAR CALIFORNIA 95324 <br /> 04/09199 QUALITY CONTROL REPORT DHS Certiflcation #1400 yin,, <br /> Total Petroleum Hydrocarbons(TPH)Analysis Nancy Biedenweg, Lab Director/ <br /> Client: GEOLOGICAL TECHNICS, INC. Date Received: 01/22/99 JJJ"' <br /> 2741 RIVER RD. Date Started: : 01125199 <br /> MODESTO, CA 95351 Date Complete: 01127/99 <br /> ATTN: RAY KABLANOW <br /> Lab Re ort#: H9012213 Lab Sample#s: PH9011347-1348 <br /> Lineari i Check: <br /> BTEX Benzene 0.9993 TPH Gasoline 0.9998 <br /> Toluene 0.9995 TPH Diesel 0.9998 <br /> Ethyl Benzene 0.9996 Motor Oil 0.9995 <br /> Xylenes 0.9998 DIELECTRIC OIL NIA <br /> MTBE NIA <br /> Std % Re eatabili MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX NIA 98 98 100 106 <br /> TPH Gasoline 107 TPH Diesel 104 <br /> DIELECTRIC OIL NIA TPH Motor Oil 87 <br /> Matrix S ike Recoveries MS MSD RPD <br /> MTBE NIA NIA ERR <br /> BTEX Benzene MATRIX INTERFERENCE ERR <br /> Toluene ERR <br /> Ethyl Benzene ERR <br /> Xylenes ERR <br /> TPH Gasoline ERR <br /> TPH Diesel 88 91 3.4 <br /> Method Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A <3 u <3 u <3 u <3 a IC <br /> TPH Gasoline <1 mgiKg TPH Diesel/MO <5 m TRPH(418.1) N/A <br /> Lab Control Sample% Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 87 73.3 - 126 <br /> Toluene 87 73.0 - 118 <br /> Ethyl Benz 94 71.2 - 118 <br /> Xylenes 95 71.6 - 120 <br /> TPH Gasoline 127 68.0 - 150 <br /> TPH Diesel 105 41.3 - 122.0 <br /> TRPH (418.1) NIA NIA <br /> OFFICE: (209)667-5258 FAX:(209)667-2581 <br />