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11 Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> C O R P O R R T l O N PO BOX 937 <br /> ' HILMAR,CALIFORNIA 95324 <br /> 03/28/01 QUALITY CONTROL REPORT DHS Cert 01400 <br /> Total Petroleum Hydrocarbons(TPH) Analysis <br /> ' Client. GEOLOGICAL TECHNICS, INC. Date Rece3.ved: 03/23/01 <br /> 2741. RIVER RD. Date Started. 03/26/01 <br /> MODESTO, CA 95351 Date Complete: 03/28/01 <br /> ATTN: JOE ANGULO <br /> Lab Report #• H1032304 Lab Sample #:PH1031226-PH1031229 <br /> Lxnearity Check <br /> BTEX Benzene 0 9998 TPH Gasoline 0 9992 <br /> Toluene 0.9996 TPH Diesel 0 9993 <br /> Ethyl Benz 0.9994 Motor Oil 0 9994 <br /> Xylenes 0 9992 TRPH (418.1) N/A <br /> MTBE 0.9999 <br /> Std % Pepentability MTBE Benzene Toluene Eth Benz Xylenes <br /> STEX 102 108 102 108 99 <br /> TPH Gasoline 101 TPH Diesel 106 <br /> TRPH (418.1) N/A Motor Oil 106 <br /> lie <br /> m-trix spike Recoveries MS MSD RPD <br /> MTBE 97 92 5 <br /> ' BTEX Benzene 98 96 2 <br /> Toluene 94 93 1 <br /> Ethyl Benz 98 98 0 <br /> Xylenes 96 96 0 <br /> TPH Gasoline 93 90 3 <br /> TPH Diesel 94 102 8 <br /> sethod Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX ND<50 ug/Kg <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 % Reocvecy EPA Performance Acceptance Range <br /> BTEX Benzene 92 73.1 124 <br /> Toluene 86 73.6 - 120 <br /> Ethyl Benz 94 72-5 - 118 <br /> Xylenes 99 72.7 121 <br /> TPH Gasolsne 105 82.4 -- 117 <br /> TPH Diesel 106 54.8 - 122 <br /> TRPH (418.1) N/A N/A <br /> N y Bs�`denweg, Lab D� eto:e "� <br /> 1 <br /> OFFICE (209)667-5258 FAX (209)667-2581 <br />