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Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> C 0 R P 0 R A T 1 0 N P O 80X 937 <br /> HILMAR,CALIFORNIA 95324 <br /> 08/09/01 QUALITY CONTROL REPORT DHS Cert #1400 <br /> Total Petroleum Hydrocarbons(TPH) Analysis <br /> ' Client: GEOLOGICAL TECHNICS, INC Date Received; 08/02/01 <br /> 2741 RIVER RD Date Started: 08/03/01 <br /> MODESTO, CA 95351 Date Complete- 08/08/01 <br /> ' MTN: JOE MM= <br /> Lala Report #: HIOS0204 Lab Sample #:PH1080036-PH1080041 <br /> I,snearity Check 71 <br /> t BTEX Benzene 0.9986 TPH Gasoline 0.9996 <br /> Toluene 0 9996 TPH Diesel 0 9999 <br /> Ethyl Senz 0 9993 Motor Oil 0 9982 <br /> ' Xylenes 0 9997 TRPH (418.1) N/A <br /> UTBE 0.9997 <br /> ' std qs Repeatability LOBE Benzene Toluene Eth Benz Xylenes <br /> BTEX 86 102 105 104 109 <br /> TPH Gasoline 106 TPH Diesel 99 <br /> TRPH (418.1) N/A Motor 01.1 105 <br /> ' ffiatrix Spike Reammmes MS MSD RPD <br /> WIM 106 105 1 <br /> BTEX Benzene 98 96 2 <br /> ' Toluene 98 92 6 <br /> Ethyl Benz 96 90 6 <br /> Xylenes 97 97 0 <br /> ' TPH Gasoline IOLT IX 0 0 <br /> TPH Diesel 101 96 5 <br /> ' Kethod Bunk 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/ND <50 ug/L TRPH(418.1) N/A <br /> [Lab Control Sample % Recovery EPA Performance Acceptance Range <br /> STEX Benzene 99 73.1 - 124 <br /> Toluene: 102 73.6 120 <br /> Ethyl Benz 105 72.5 - 118 <br /> Xylenes 99 72.7 = 121 <br /> • TPH Gasoline 106 82.4 117 <br /> TPH Dae:sel 99 75.8 124 <br /> ' TRPHN/A N/A <br /> - 17411.7 <br /> Nancy B g, Lab D:6209)667-5258 FAX (209)667-2581 <br />