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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone (209)384-2930 <br /> Fax (209)384-1507 <br /> California Geophysical Client Protect ID Beneto#8 Method EPA 5030/8260 <br /> P O Box 578341 Reference Number 8403 Instrument ID HP 5972 MS <br /> Modesto,CA 95357 Sample Desnption Soil Extracted 08-01-05 <br /> Attn John Cussen Sample Prep/Analysis Method EPA 5030/8260 Analyzed 08-02-05 <br /> Analyst Scott Foster Reported 08-10-05 <br /> QUALITY CONTROL DATA REPORT <br /> SPIKE ID VSMS-8015 <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br /> I mg/Kg mg/Kg m IK %R <br /> COMPOUNDS <br /> t-But l Alcohol(t-BA) 080 ND 300 108% 553-153 <br /> Methyl t-but l ether MTBE 0 010 ND 0 100 151% 604-137 <br /> Dnso ro I ether DIPE 0 010 ND 0 100 124% 700-130 <br /> Ethyl t-Butyl ether ETBE 0 010 ND 0 100 932% 700-130 <br /> t-Am t methyl ether TAME 0 010 ND 0 100 920% 700-130 <br /> 1,2-Dichloroethane 1,2-DCA 0 010 ND 0 100 880% 636-138 <br />' <br /> Ethylene dibromide EDB 0 010 ND 0 100 948% 667-129 <br /> Surrogates <br /> 1,2-Dichloroethane-d4 '0010 937 0 400 105% 592-135 <br /> . Toluene-d8 0 010 807 0 400 91 0% 629-132 <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> m /K %R %R <br /> COMPOUNDS <br /> t-ButyI Alcohol(t-BA) 300 926% 849% 553-153 868% <br /> Methyl t-but I ether MTBE 0 100 144% 166% 604-137 140% <br /> Dusopropyl ether DIPE 0 100 916% 920% 700-130 0436% <br /> Ethyl t-Butyl ether ETBE 0 100 800% 780% 700-130 253% <br /> t-Am I methyl ether AME 0 100 860% 812% 700-130 529% <br /> 1,2-Drchloroethane 1,2-DCA 0 100 656% 588% 636-138 109% <br /> Ethylene dibromide EDB 0 100 732% 624% 667-129 159% <br /> ,Surrogate <br /> 1,2-Drchloroethane-d4 0 400 794% 813% 592-135 236% <br />' Toluene-d8 0 400 661% 646% 629-132 230% <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 limas and recoveries for MSIMSD's are advisory only and are not used to accept or <br /> refect batch results <br /> APPROVED BY APPROVED BY =' <br /> Clan J Cone Jam C Phillips <br /> Laboratory Manager Lab Q tory Drrector <br />