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1 <br />' CASTLE ANALYTICAL LABORATORY <br /> S ORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone (209)384-2930 <br />' Certnccate#2480 Fax (209)384-1507 <br /> Advanced GeoEnviron mental Inc Client Project ID Pacific Carwash Method EPA 5030/8260 <br />' of Northern California Reference Number 7013 Instrument Ito HP 5972 MS <br /> 837 Shaw Road Sample Description Water Prepared 06-08-04 <br /> Stockton CA 95215 Analyst Scott Foster Analyzed 06-08-04 <br /> Attn Tim Cuellar Reported 06-11-04 <br /> QUALITY CONTROL DATA REPORT <br />' SPIKE ID VWMS-6084 <br /> Reporting BLANK Spiking Control %R <br />' Limit Result Level Spike Limits <br /> IL /L /L %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 20 ND 750 686% 553- 153 <br />' <br /> Methyl t-but I ether (MTBE) 050 ND 250 888% 604- 137 <br /> Dirso ro I ether(D[PE) 050 ND 250 772% 705- 131 <br /> Ethyl t-But I ether(ETRE) 050 ND 250 948% 721 - 131 <br /> t-Amyl methyl ether(TAME) 050 ND 250 112% 71 7- 119 <br />' 1 2-Dichioreethane(1 2-0CA) 0 50 ND 250 104% 636- 138 <br /> Ethylene dibromide(EDB) 050 ND 250 900% 667- 129 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 1 0 907% 100 9000/0 1 59 2- 135 <br /> Toluene-d8 1 0 100% 100 106% 62 9- 132 <br /> Splkrng MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> COMPOUNDS <br /> t-Butyl Alcohoi (t-BA) 750 8390% 855% 553-153 1 83% <br /> Methyl t-but I ether (MTBE) 250 91 6% 924% 604-137 0760% <br /> Dusoprop I ether(DIPE) 250 101% 952% 70 5-131 5 96% <br /> Ethyl t-But l ether(ETBE) 250 952% 108% 72 1 -131 120% <br /> t-Am I methyl ether(TAME) 250 780% 976% 71 7-119 19 2% <br />' 1 2-Dichloroethane(1 2-DCA) 250 106% 106% 636-138 000% <br /> Ethylene dibromide(EDB) 250 976% 940% 667- 129 376% <br /> Surrogate <br /> 1 2-Dichloroetharne-d4 =00 969% 977% 592-135 0822% <br /> Toluene-d8 100 948% 102% 629-132 692% <br /> The LCS(Laboratory Check Sample)is a control sample of known interferent free matrix that is fortified with representative anaiytes 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 /> • <br /> ANALYST APPROVED BY <br /> Clary J Cone Jan <br /> hrllrps <br /> 101oratofy Director <br /> I <br />