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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 /> Advanced Geo Environmental Inc Client Project ID Sierra Lumber Method EPA 5030/8260 <br />' of Northern California Reference Number 5839 Instrument ID HP 5972 MS <br /> 837 Shaw Road Matrix Water Prepared 06-26-03 <br /> Stockton, CA 95215 Analyst Scott Foster Analyzed 06-26-03 <br /> Attn Tim Cuellar Reported 06-30-03 <br /> QUALITY CONTROL DATA REPORT <br /> SPIKE ID VWMS-6263 <br /> Reporting BLANK Spiking Control %R <br />' Limit Result Level Spike Limits <br /> IL /L N /L %R <br /> COMPOUNDS <br /> t-But I Alcohol t-BA) 20 ND 750 158% 553-153 <br />' <br /> Methyl t-but I ether (MTBE) 050 ND 250 108% 604-137 <br /> Diisa ro l ether(RIPE) 050 ND 250 860% 705-131 <br /> [Ethyl t-Butyl ether ETBE 050 ND 250 106% 72 1 - 131 <br /> t-Am I methyl ether TAME 050 ND 250 102% 71 7- 119 <br />' 1 2-Dichloroethane 1 2-DCA 050 NO 250 119% 63 6-138 <br /> Ethylene dibromide(EDB) 050 ND 250 110% 667- 129 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 100 107% 10 0 101% 592- 135 <br />' Toluene d8 <br /> 100 82 8% 100 998% J. 629- 132 <br /> Spiking MATRIX MATRIX %R %RPD <br />' Level SPIKE SPIKE DUP Limits <br /> COMPOUNDS IL %R %R <br /> t-But I Alcohol t-BA) 750 159% 154% 553-153 1 91% <br />' <br /> Methyl t-but I ether (MTBE) 250 148% 137% 604-137 710% <br /> Diisopro I ether(RIPE) <br /> 250 920% 980% 705-131 632% <br /> Ethyl t-But l ether ETBE 250 122% 117% 721 - 131 369% <br /> t-Am I meth i ether(TAME) 250 120% 106% 71 7-119 11 6% <br /> 4 2-Dichloroethane 1 2-DCA 250 142% 116% 636-138 202% <br /> Ethylene dibromide(EDB) 250 168% 118% 667- 129 355% <br /> Surrogate <br /> 1 2-Dichloroethane-d4 10 Q 110% 111% 592- 135 0 722% <br /> Toluene-d8 10 0 96 0% 104% 62 9-132 8 19% <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 PPROVED BY <br /> Clan J Cone Jame-I-T P 1111ps <br /> La story Director <br /> I <br />