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Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> i C O R P O R A T I O N PO BOX 937 <br /> HILMAR,CALIFORNIA 95324 <br /> 07/03/01 QUALITY CONTROL REPORT DHS Gert #1400 <br />' Total Petroleum Hyarocarbons(TPH) Analysis <br /> Client GEOLOGICAL TECHNICS, INC. Date Received 06/26/01 <br /> 2741 RIVER RD. Date Started 06/29/01 <br /> MODESTO, CA 95351 Date Complete. 07/02/01 <br />' ATTH. MIKE NIEMI <br /> Lab Report #- H1062603 Lab Sample #,PH1061288-1294 <br /> Linearity Cheek <br />' BTEX Benzene 0 9991 TPH Gasoline 1.0000 <br /> Toluene 0.9996 TPH Diesel N/A <br /> Ethyl Benz 0.9998 Motor Oil N/A <br />' Xylenes 0 9999 TRPH (416 1) N/A <br /> MTBE 0 9999 <br /> ' std 3 -Repeatabilxty - MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX 112 97 103 106 101 <br /> TPH Gasoline 105 TPH Diesel N/A <br /> TRPH (418.1) N/A Motor Oil N/A <br /> ' 14atrzx Spike Recoveries MS MSD RPD <br /> MTBE 110 109 1 <br /> BTEX Benzene 104 100 4 <br /> ' Toluene 105 98 7 <br /> Ethyl Benz 97 102 3 <br /> Xylenes 111 105 6 <br /> TPH Gasol3-ne 98 112 14 <br /> TPH Diesel N/A N/A N/A <br /> ' lathod Blank MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX <2 ug/L < 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 /> ' gat, Control Semple % Recovery EPA Performance Acceptance Range <br /> ' BTEX Benzene 102 73 1 124 <br /> Toluene 101 73 6 120 <br /> Ethyl Benz 108 72 5 - 118 <br /> ' Xylenes 116 72.7 - 121 <br /> TPH Gasoline 97 B2.4 117 <br /> TPH Diesel N/A N/A - N/A <br /> ' RPH (418.1.) N/A N/A <br /> � ' <br /> NaLricy 8 denweg, Lab pl 209)667 5258 FAX (209)667-2581 <br />