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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 /> ENorthern <br /> Environmental Inc Client Project ID Pac Car Wash Method EPA 5030/8260 <br />' lifornia Reference Number 6371(21-40) Instrument ID HP 5972 MS <br /> Matrix Water Prepared 12-08-03 <br /> 5215 Analyst Scott Foster Analyzed 12-08-03 <br /> ar Reported 12-18-03 <br /> QUALITY CONTROL DATA REPORT <br />' SPIKE ID VWMS-DO83 <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br /> !L IL /L %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 20 ND 750 986% 553- 153 <br /> Methyl t-but I ether (MTBE) 050 ND 250 104% 604- 137 <br /> Diiso ra l ether(DIPE) 050 ND 250 860% 705- 131 <br /> Ethyl t-But I ether(ETRE) 050 ND 250 956% 1 721 - 131 <br /> t-Am I methyl ether TAME 050 ND 250 102% 71 7- 119 <br /> 1 2-Dichloroethane 1 2-DCA 050 ND 250 106% 63 6- 138 <br /> Ethylene dibromide(EDB) 050 ND 250 105% 667- 129 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 050 101% 100 885% 592- 135 <br /> Toluene-d8 050 899% 1 100 95 2% 629-1 <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> IL %R %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 750 <br /> 768% 897% 55 3- 153 144% <br /> Methyl t-but I ether MTBE 250 226% 139% 604- 137 516% <br /> Duso rop I ether(DIPE) 250 820% 884% 705- 131 7 51% <br /> Ethyl t-But I ether ETBE 250 912% 100% 721 - 131 921% <br /> I t-Am I methyl ether(TAME) 250 828% <br /> 964% 717- 119 134% <br /> 1,2-Dichloroethane(1,2-DCA) 250 114% 118% 636- 138 259% <br /> Ethylene dibromide(EDB) 250 888% 100% 667- 129 119% <br /> Surrogate <br /> I i 2-Dichloroethane-d4 100 962% 118% 592- 135 203% <br /> Toluene-d8 100 949% 117% 629-132 20 9% <br /> I 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 MSlMSD's are advisory only and are not used to accept or <br /> reject batch results <br /> ANALYST APPROVED BY <br /> Clary J Cone J es hrl6ps t <br /> ILaboratory Director <br /> 1 <br />