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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 />' California Geophysical Client Project ID Beneto#8 Method EPA 5030/8260 <br /> P O Box 578341 Reference Number 8341 Instrument ID Varian 21005 <br /> Modesto, CA 95357 Sample Description Water Prepared 07-15-05 <br />' Attn John Cussen Analyst Scott Foster Analyzed 07-15-05 <br /> Reported 07-21-05 <br />' QUALITY CONTROL DATA REPORT <br /> SPIKE ID VWMS-7155V <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br /> !L IL Vq1L %R <br />' COMPOUNDS <br /> t-But l Alcohol t-BA 20 ND 750 826% 576-163 <br /> Methyl t-but I ether MTBE 050 ND 250 796% 64 7-134 <br /> Dirso ro I ether DIPS . 050 ND 250 864% 582-135 <br />' <br /> Ethyl t-But 1 ether ETBE 050 ND 250 840% 650-132 <br /> t-Am l methyl ether TAME 050 ND 250 796% 610-139 <br /> 1,2-Dichloroethane 1,2-DCA 050 ND 250 804% 701-145 <br /> Ethylene dibromide EDB 050 ND 250 904% 550-156 <br />' Surro lates <br /> 1,2-Dichloroethane-d4 1 00 983% 100 870% 80 0-118 <br /> Toluene-d8 1 00 902% 100 865% 74 1-129 <br />' Splking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br />' 1L %R %R <br /> COMPOUNDS <br /> 75 0 47 3% 644% 397-178 172% <br /> t-But I Alcohol(t-BA) <br /> Methyl t-butyl ether MTBE 250 103% 952% 553-144 427% <br /> Dnso ro I ether DIPS 250 948% 107% 549-135 102% <br />' <br /> Ethyl t-Butyl ether ETBE 250 984% 108% 540-136 893% <br /> t-Am I methyl ether TAME 250 956% 104% 396-131 769% <br /> 1,2-Dichloroethane 1,2-DCA 250 996% 972% 739-147 212% <br /> Ethylene dibromide EDB 250 996% 107% 633-141 669% <br />' Surro ate <br /> 1,2-Dichloroethane d4 100 85 4% 987% 689-128 144% <br /> Toluene-d8 100 91 6% 99 p% fib 0-128 7 76% <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 MS/MSD's are advisory only and are not used to accept or <br /> ' reject batch results <br /> APPROVED BY APPROVED BY <br /> ' Cla Cone Jam s C fillips <br /> Laboratory Manage La oratory Director <br />