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f <br /> 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 /> Advanced GeoEnvironrnental, Inc Client Project ID Flame Mini Mart Method EPA 5030/8260 <br />' of Northern California Reference Number 5922 Instrument ID HP 5972 MS <br /> 837 Shaw Road Matrix Water Prepared 07-25-03 <br /> Stockton, CA 95215 Analyst Scott Foster Analyzed 07-25-03 <br /> Attn Tim Cuellar Reported 08-08-03 <br /> QUALITY CONTROL DATA REPORT <br /> SPIKE ID VWMS-7253 <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 750 103% 553- 153 <br /> Methyl t-but I ether (MTBE) 050 NO 250 964% 604-137 <br /> Dnsoprap f ether(DIPE) 050 ND 250 920% 705-131 <br /> Eth I t-But I ether(ETBE) 050 ND 250 796% 721 - 131 <br /> t-Am l methyl ether(TAME) 050 ND 250 102% 71 7- 119 <br />' 1,2-Dichloroethane(1 2-OCA) 050 ND 250 138% 63 6-138 <br /> Ethylene dibromide EDB 050 ND 250 115% 667-129 <br /> Surrogates <br /> 1 2-Dichlorcethane-d4 100 798% 100 101% 592- 135 <br /> Toluene-d8 10 0 95 8% 100 98 3% 629- 132 <br /> Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> Ea /L %R %R <br /> COMPOUNDS <br /> t-Butyl Alcohol(t-BA) 750 829% 842% 553-153 147% <br /> Methyl t-but I ether MTBE 250 100% 112% 604-137 105% <br /> Diiso rop I ether(DIPE) 250 792% 824% 705-131 388% <br /> Ethyl t-But i ether ETBE 250 748% 596% 721 -131 226% <br /> t-Am I methyl ether(TAME) 250 764% 628% 71 7-119 16 5% <br /> 1 2-Dichloroethane 1 2-DCA) 250 126% 130% 63 6-138 245% <br /> Ethylene dibromide(EDB) 250 104% 968% 667-129 679% <br /> Surrogate <br /> 1 2-Dichloroethane-d4 100 992% 951% 592-135 422% <br /> Toluene-d8 100 929% 909% 629-132 218% <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 /> IANALYST APPROVED BY <br /> Clan J Cone VJame Phillips <br /> La ratory Director <br />