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1 <br /> CASTLE' ANALYTICAL LABORATORY <br />' E nvironmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone (209)384-2930 <br /> Certificate#2480 Fax (209)384-9507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Pac Car Wash Method EPA 5030/8260 <br />' of Northern California Reference Number 6371(41) Instrument ID MP 5972 MS <br /> 837 Shaw Road Matrix Water Prepared 12-09-03 <br /> Stockton CA 95215 Analyst Scott Foster Analyzed 12-09-03 <br /> Attn Tim Cuellar Reported 12-18-03 <br /> QUALITY CONTROL DATA REPORT <br />' SPIKE ID VWMS-DO93 <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-SA) 20 ND 750 904% 553- 153 <br />' <br /> Methyl t-but I ether (MTBE) 050 NO 250 102% 604-137 <br /> Diisoprop I ether(DIPE) 050 ND 250 876% 705-131 <br /> Ethyl t-But I ether(ETRE) 050 ND 250 948% 721 - 131 <br /> t-Am I methyl ether(TAME) 050 ND 250 106% 71 7- 119 <br /> 1 2-Dichloroethane(1 2-DCA) 050 ND 250 109% 636-138 <br /> Ethylene dibromrde(EDB) 050 ND <br /> 250 992% 667- 129 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 050 888% 100 103% 59 2-135 <br /> Toluene-d8 0 50 89 2% 10 0 96 2% 62 9- 132 <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> !L %R %R <br /> COMPOUNDS <br /> I t-taut I Alcohol(t-BA) 750 876% 981% 553- 153 107% <br /> Methyl t-butyl ether MTBE 250 167% 213% 604-137 340% <br /> Dnso ro I ether DIPE 250 800% 832% 705-131 3 92% <br /> Ethyl t-But I ether(ETRE) 250 908% 976% 72 1 -131 722% <br /> t-Am I methyl ether(TAME) 250 101% 108% 717-119 569% <br /> 1 2-Dichloroethane(1,2-DCA) 250 101% 108% 636- 138 687% <br /> Ethylene dibromide(EDB) 250 952% 101% 667- 129 5 71% <br /> Surrogate <br /> 1 2-Dichloroethane-d4 10 0 953% 103% 592-135 7 57% <br /> Toluene-d8 10 0 96 2% 950% 62 9-132 1 26% <br /> j�� <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 /> ANALYST APPROVED BY <br /> Clary J Cone Jame r lips <br /> La ratory Director <br />