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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone (209)384-2930 <br /> Fax (209)384-1507 <br />' Advanced GeoEnvironmental Inc Client Project ID Cal Fuels Method EPA 5030/8260 <br /> of Northern California Reference Number 3849 Instrument ID HP Series II <br /> 837 Shaw Road Matrix Water Prepared 6-28-01 <br /> Stockton, CA 95215 Analyst Clan J Cone Analyzed 6-28-01 <br /> AIM Tim Cuellar Reported 7-5-01 <br /> QUALITY CONTROL DATA REPORT <br /> rSPIKE ID VWMS-6281 <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limas <br /> IL li IL N 1L %R <br /> COMPOUNDS <br />' t-But l Alcohol(t-BA) 080 ND 750 110% 70-130 <br /> Methyl t-but I ether (MTBE) 0 010 ND 250 844% 70-130 <br /> Diiso ro I ether(DIPS) 0 010 ND 250 732% 70-130 <br /> Ethyl t-Butyl ether(ETBEJ 0 010 ND 250 800% 70-130 <br />' t-Am I methyl ether(TAME) 0010 ND 250 700% 70-130 <br /> 1 2-Dichloroethane 1,2-DCA 0 010 ND 250 107% 70-930 <br /> Ethylene dibromide(EDB) 0 010 ND 250 102% 70-130 <br /> Surro ates <br />' 1 2-Dichloroethane-d4 0 010 9946/. 100 113% 70-130 <br /> Toluene-d8 0 010 193% 100 982% 70-130 <br />' Spiking MATRIX MATRIX %R %RPD <br /> Level SPIKE SPIKE DUP Limits <br /> /L %R %R <br /> COMPOUNDS <br />' t-Bu I Alcohol (t-BA) 750 141% 920% 70-130 41 1% <br /> Methyl t-butyl ether MTBE 250 980% 612% 70-130 462% <br /> Diiso ro I ether(DIPS)_ 250 956% 652% 70-130 378% <br /> Ethyl t-But I ether ETRE) 250 948% 640% 70-130 384% <br /> t-Am I methyl ether(TAME") 250 936% 588% 70-130 452% <br /> 1 2-Dichloroethane(1,2-DCA) 250 104% 808% 70-130 247% <br /> Ethylene dibromide(EDB) 250 108% 804% 70-130 28 3% <br /> Surrogate <br />' 1 2-Dichloroethane-d4 100 106% 835% 70-130 237% <br /> Toluene-d8 100 108% 734% 70-130 385% <br />' The LCS (Laboratory Check Sample)is a control sample of known, interferent free matnx 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 MSIMSD's are advisory only and are not used to accept or <br /> reject batch results <br /> ANALYST 401V APPROVED BY <br /> Clan J Cane J s C TAMPS <br /> aboratory Director <br />