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l , <br /> f <br /> Sherwood <br /> Labs 8071 NORTH LANDER AVENUE <br /> C O R P 0 R A T ! 0 N P.O.BOX 937 <br /> HILMAR,CALIFORNIA 95324 <br /> 03/27/01 QUALITY CONTROL REPORT DHS Cert. 01400 <br /> Total Petroleum Hydrocarbons(TPH) Analysis <br /> Client: GEOLOGICAL ,TECHNICS, INC. Date Received: 03/19/01 <br /> 2741 RIVER RD. Date Started: 03/23/01 <br /> MODESTO, CA 95351 Date Complete: 03/26/01 <br /> ATTN.- RAY kABLANOW <br /> Lab Report #: H1031923 Lab Sample #;PH1031126-PH1031127 <br /> Linearity Check: <br /> BTEX Benzene 0.9998 TPH Gasoline 0.9992 <br /> Toluene 0.9996 TPH Diesel N/A <br /> Ethyl Benz 0..9994 Motor Oil N/A <br /> �+ Xylenes 0.9992 TRPH (418.1) N/A <br /> �! MTBE N/A <br /> std Repeatability MTBE Benzene Toluene Eth Benz Xylenes <br /> BTEX N/A 110 102 103 11.0 <br /> TPH Gasoline 108 TPH Diesel N/A <br /> -� TRPH (418.1) N/A Motor Oil N/A <br /> [matrix spike Recoveries MS MSD RPD <br /> MTBE N/A NIA N/A <br /> BTEX Benzene 104 100 4 <br /> Toluene 102 100 2 <br /> ' Ethyl Benz 101 97 4 <br /> L Xylenes 99 101 2 <br /> TPH Gasoline 94 93 1 <br /> TPH Diesel N/A N/A N/A <br /> [method Blank_,,,,. ;"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 /> i <br /> L, Control sample % ReaEPA Performance Acceptance Range <br /> BTEX Benzene 103 73.1 - 124 <br /> Toluene 101 73.6 120 <br /> Ethyl Benz 98 72.5 - 118 <br /> Xylenes 101 72.7 - 121 <br /> TPH Gasoline 104 82.4 117 <br /> TPH Diesel N/A N/A N/A <br /> TRPH 8. ) N/A N/A <br /> Nancy B' denwr <br /> OFFICE: (209)667-5258 FAX: (209)667-2581 <br /> i <br />