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. CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone (209)384-2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> BSK Analytical Laboratories Client Project ID 2003031257 Method EPA 5030/8260 <br /> 1414 Stanislaus Street Client Project Name Connell Motor Truck Instrument ID HP 5972 MS <br /> Fresno CA 93706 Reference Number 5604 Prepared 03-31-03 <br /> Attn Miyuki Finita Matrix Water Analyzed 03-31-03 <br /> Analyst Scott Foster Reported 04-01-03 <br /> QUALITY CONTROL DATA REPORT <br /> SPIKE ID VWMS-3313 <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br /> !L IL /L %R <br /> COMPOUNDS <br /> t-Blit i Alcohol(t-BA) 20 ND 750 107% 553- 153 <br /> Methyl t-but I ether MTBE 050 ND 250 129% 604- 137 <br /> Duso ro I ether DIPE 050 ND 250 115% 705-131 <br /> Ethyl t-But l ether ETSE 050 ND 250 113% 721 -131 <br /> t-Am I methyl ether(TAME) 050 ND 250 106% 71 7-119 <br /> 1 2-Dtchlorcethane(1,2-DCA) 050 ND 250 140% 636-138 <br /> Ethylene dibromde (EDB) 050 ND 260 952% 667- 1 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 100 107% 100 124% 592-135 <br /> Toluene-d8 100 95% 100 931% 629-132 <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> !L %R %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 750 882% 139% 553-153 424% <br /> Methyl t-hut I ether (MTBE) 250 116% 936% 604-137 199% <br /> Dnso ro I ether DIPE 250 100% 908% 705- 131 9 8B% <br /> Ethyl t-But I ether ETBE 250 106% 808% 721 - 131 270% <br /> t-Am I methyl ether TAME 250 988% 676% 717- 119 33 1% <br /> 1 2-Dichloroethane 1,2-DCA) 250 137% 164% 636- 138 125% <br /> Ethylene dibromide EDB 250 888% 876% 66_7-129 1 36% <br /> Surrogate <br /> 1,2-Dichloroethane-d4 100 114% 131% 592- 135 143% <br /> Toluene-d8 100 823% 764% 629- 132 744% <br /> The LCS(Laboratory Check Sample)is a control sample of known interferent free matrix that is fortified with representative analytes and <br /> analyzed using the same reagents, preparation and analytical methods employed for the samples The LCS %recovery is used for validation <br /> of sample batch results Due to matrix effects,the QC limits and recoveries for MSIMSD's are advisory only and are not used to accept or <br /> reject batch results <br /> 0 <br /> ANALYSTAPPROVED BY <br /> CIA—,w <br /> Clary J Cone Jame C Phillips <br /> Laboratory Director <br />