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Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> C a R D R a r r o N <br /> PO BOX 937 <br /> ' FULMAR,CALIFORNIA 95324 <br /> i <br /> 05/04/01 QUALITY CONTROL REPORT DHS Cert #1400 <br /> Total Petroleum Hydrocarbons(TPH) Analysis <br /> ' Client GEOLOGICAL TECHNICS, INC. Date Recemved: 04/30/01 <br /> 2741 RIVER RD Date Started 05/02/01 <br /> MODESTO, CA 95351 Date Complete 05/04/01 <br /> ' ATTN. RAY KABLANOW <br /> Lab Report # H1043027 Lab Sample #-PH1041460-PH1041463 <br /> Lznearxty Check <br /> ' BTEX Benzene 0.9995 TPH Gasoline 0 9997 <br /> Toluene 0.9985 TPH Diesel N/A <br /> Ethyl Benz 0.9997 Motor Oil N/A <br /> Xylenes 0.9988 TRPH (418 1) N/A <br /> MTBE N/A <br /> Std sk Repeatabslity MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 100 96 102 108 <br /> TPH Gasoline 98 TPH Diesel N/A <br /> TRPH (418.1) N/A Motor Oil N/A <br /> ' 69atrix Spike Recoveries MS MSD RPD <br /> MTBE N/A N/A N/A <br /> BTEX Benzene 103 104 1 <br /> ' Toluene 100 103 3 <br /> Ethyl Benz 104 102 2 <br /> Xylenes 102 101 1 <br /> ' TPH Gasoline 95 99 4 <br /> TPH Diesel N/A N/A N/A <br /> ' m thod ]lank 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 5k Recovery EPA Performance Acceptance Range <br /> ' BTEX Benzene 88 73 1 - 124 <br /> Toluene 90 73.6 120 <br /> Ethyl Benz 93 72 5 -- 118 <br /> Xylenes 100 72 7 - 121 <br /> TPH Gasoline 97 82 4 - 117 <br /> TPH Diesel N/A N/A - N/A <br /> TRPH (416.1) N/A N/A <br /> S <br /> ' N y edenweg, Lab i� {209)667-5258 FAX (209)667-2581 <br />