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S- h! erwood <br /> lie Labs 8071 NORTH LANDER AVENUE <br /> C 0 R P 0 R A T 1 0 N P O BOX 937 <br /> HILMAR CALIFORNIA 95324 <br /> ' <br /> 01/08/01. QUALITY CONTROL REPORT DHS Cert. #1400 <br /> Total Petroleum Hydrocarbons(TPH) Analysis <br /> Client GEOLOGICAL TECHNICS, INC. Date Received. 01/02/01 <br /> ' 2741 RIVER RD. Date Started, 01/03/01 <br /> MODESTO, CA 95351 Date Complete 01/05/01 <br /> ATTN RAY KABLANOW <br /> ' Lab Report #: H1010207 Lab Sample #dPH1010040-PH1010044 <br /> Linearity Check <br /> ' BTEX Benzene 0.9994 TPH Gasoline 0.9999 <br /> Toluene 0.9995 TPH Da.esel 0.9978 <br /> Ethyl Benz 0.9992 Motor Oil 0 9962 <br /> ' Xylenes 0.9991. TRPH (418.1) N/A <br /> MTBE N/A <br /> ' std % Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 92 95 92 94 <br /> TPH Gasoline 102 TPH Diesel 105 <br /> TRPH (418.1) N/A Motor Oil 100 <br /> Ptrix Spike Recoveries MS MSD RPD <br /> ' MTBE N/A N/A N/A <br /> BTEX Benzene 93 91 2 <br /> Toluene 96 94 2 <br /> ' Ethyl Benz 99 91 8 <br /> Xylenes 95 92 3 <br /> ' TPH Gasoline 99 98 1 <br /> TPH Diesel 119 111 7 <br /> ' taethod 81ank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A < 3 ug/L < 3 ug/L <.3 ug/L <.3 ug/L <br /> TPH Gasoline <50 ug/L Diesel/MO <50 ug/L TRPH(418 1) N/A <br /> Lab Control Sample % Recovery EPA Performa=e Acceptance Range <br /> BTEX Benzene 94 73.1 - 124 <br /> ' Toluene 92 73.6 - 120 <br /> Ethyl Benz 90 72 5 11.8 <br /> xylenes 98 72 7 - 321 <br /> TPH Gasoline 99 82 4 - 1.1.7 <br /> TPH Diesel 101 76 5 - 136 <br /> ' TRPH (418 1) N/A N/A <br /> � e ��e <br /> OFFICE (209)667-5258 FAX (209)667-2581 <br />