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1 <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 GeoEnvironmental Inc Client Protect ID Sierra Lumber Method EPA 5030/8260 <br />' of Northern California Reference Number 6479 Instrument ID HP 5972 MS <br /> 837 Shaw Road Sample Description Water Prepared 01-05-04 <br /> Stockton,CA 95215 Analyst Scott Foster Analyzed 01-05-04 <br /> Attn Tim Cuellar Reported 01-06-04 <br />' QUALITY CONTROL DATA REPORT <br /> SPIKE ID V1NMS-1054 <br /> Reporting BLANK Spiking Control %R <br />' Limit Result Level Spike Limits <br /> IL 1L IL %R <br /> COMPOUNDS <br /> t-But I Alcohol(t-BA) 20 ND 750 724% 553-153 <br />' <br /> Methyl t-but l ether (MTBE) 050 ND 250 108% 604-137 <br /> Diiso r0 l ether(RIPE) 050 ND 250 920% 705- 131 <br /> Ethyl t-But I ether(ETBE) 050 NO 250 828% 721 - 131 <br /> t-Am I methyl ether TAME 050 ND 250 888% 71 7- 119 <br /> 1 2-Dichloroethane(1 2-DCA) 050 NO 250 120% 636-138 <br /> Ethylene dibromide(EDB) <br /> 050 ND 250 908% 667-1 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 1 0 91 4% 100 904% 592-135 <br />'• Toluene-c!8 1 0 115% 10 0 947% 62 9-132 <br /> Spiking MATRIX MATRIX %R %RPD <br />' Level SPIKE SPIKE DUP Limits <br /> /L %R %R <br /> COMPOUNDS <br /> t-But I Alcohol (t-BA) 750 945% 945% 553- 153 0028% <br /> I <br /> Methyl t-butyl ether (MTBE) 250 106% 101% 604-137 4 11% <br /> Diisopro 1 ether(DIPE) 250 130% 131% 705-131 0306% <br /> Ethyl t-But I ether(ETBE) 250 105% 107% 721 -131 189% <br /> t-Am I methyl ether(TAME) 250 884% 924% 71 7-119 4 07% <br /> I 1 2-Dtchloroethane 1 2-DCA) 250 868% 896% 63 6- 138 317% <br /> Ethylene d3bromtde(EDB) 250 944% 956% 667- 129 126% <br /> Surrogate <br /> 1 2-Dichloroethane-d4 100 102% 966% 592- 135 495% <br /> Toluene-d8 100 109% 1160% 629- 132 649% <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 matnx 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 Cone James rps <br /> Labor ory Director <br /> I <br />