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Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> C O R P O R A T 1 0 N PO SOX 937 <br /> H11MAR CA1 IFORNIA95324 <br /> 01/16/01 QUALITY CONTROL REPORT DHS Cert. #1400 <br /> Total Petroleum Hydrocarbons(TPN) Analysis <br /> Client GEOLOGICAL TEC1X <br /> ICS, INC. Date Received- 01/09/01 <br /> 2741 RIVER RD. Date Started: 01/11/01 <br /> MODESTO, CA 95351 Date Complete 01/15/01 <br /> ATTN. RAY KABLANOW <br /> Lab Report #: H1010905 Lab Sample #:PH1010180-PH1010184 <br /> ' Linearity Check <br /> BTEX Benzene 0.9994 TPH Gasoline 0.9999 <br /> ' Toluene 0.9976 TPH Diesel N/A <br /> Ethyl Benz 0.9978 Motor 011 N/A <br /> Xylenes 0.9978 TRPH (418.1) N/A <br /> 1 MTBE N/A <br /> std [tapaatnbility MTBE Benzene Toluene Eth Benz Xylenes <br /> ' BTEX N/A 107 107 108 114 <br /> TPH Gasoline 101 TPH Diesel N/A <br /> TRPH (418 1) N/A Motor Oil N/A <br /> Matrix =ke Recove <br /> ries MS MSD RPD <br /> ' MTBE N/A N/A N/A <br /> BTEX Benzene 95 99 4 <br /> Toluene 92 98 6 <br />' Ethyl Benz 90 96 6 <br /> xylenes 91 99 8 <br /> TPH Gasoline 105 105 0 <br /> TPH Diesel N/A N/A N/A <br /> kethod Hlank 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 N/A TRPH(418.1) N/A <br /> Lab control sample % Recovery EPA Performance Acceptance Range <br /> BTEX Benzene 101 73 1 - 124 <br /> Toluene 94 73 6 T 120 <br /> Ethyl Benz 101 72.5 118 <br /> Xylenes 108 72.7 - 121 <br /> TPH Gasoline 97 82.4 = 11.7 <br /> TPH Di-asel r/A iv/p, iv/H <br /> TRPH (418.1) N/A N/A <br /> �f �� / /Col/ <br /> l+T cy <br /> Bi denweg, Lab Di cto <br /> OFFICE (209)667-5258 FAX (209)667-2581 <br />