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CASTLE ANALYTICAL LABORATORY <br /> Ile <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 Top Filling Method EPA 5030/8260 <br /> of Northern California Reference Number 5923 Instrument ID HP Series II <br />' 837 Shaw Road Matnx Soil Prepared 07-25-03 <br /> Stockton,CA 95215 Analyst S Foster Analyzed 07-26-03 <br /> Attn Tim Cuellar Reported 08-18-03 <br />' QUALITY CONTROL DATA REPORT <br /> SPIKE ID VSMS-7253 <br /> Reporting BLANK Spiking Control %R <br /> Limit Result Level Spike Limits <br />' m 1K mg/9 m IK %R <br /> COMPOUNDS <br /> t-But l Alcohol(t-BA)_ 80 ND 300 110% 70-130 <br /> Methyl t-but I ether MTBE 0 010 ND 0 900 872% 70-130 <br />' Dnsa rop I ether RIPE) 0 010 ND 0 100 796% 70-130 <br /> Ethyl t-But I ether ETBE 0 010 ND 0 100 900% 70-130 <br /> t-Am I methyl ether TAME 0 010 ND 0 100 868% 70-130 <br /> 1 2-Dichloroethane 1,2-DCA 0 010 NO 0 100 126% 70-130 <br /> Ethylene dibromide EDB 0 010 ND 0 100 928% 70-130 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 0 010 108% 0 400 125% 70-130 <br />'• Toluene-d8 0 010 105% 0 400 100% 70-130 <br /> Spiking MATRIX MATRIX %R %RPD <br />' Level SPIKE SPIKE DUP Limits <br /> m !K %R %R <br /> COMPOUNDS <br /> t-Bu i Alcohol(t-BA) 300 876% 849% 70-130 290% <br />' <br /> Methyl t-but I ether MTBE 0 100 692% 109% 70-130 410% <br /> Dnsopropyl ether(DIPE) 0 100 656% 112% 70-130 505% <br /> Ethyl t-But l ether(ETBE) 0 100 940% 121% 70-130 250% <br /> t-Am I methyl ether TAME 0 100 624% 764% 70-130 169% <br /> 1 2-Dichloroethane(1 2-DCA) 0 100 996% 924% 70-130 750% <br /> Ethylene dibromide EDB 0 100 816% 876% 70-130 709% <br /> Surrogate <br /> 1 2-Dichloroethane-d4 0 400 886% 963% 70-130 8330% <br />' Toluene-d8 0 400 924% 1 960% 70-130 3 820/. <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 MSIMSD's are advisory only and are not used to accept or <br /> reject batch results <br /> I <br />' ANALYST APPROVED BY <br /> Cone Jame Phillips <br /> La ratory Director <br />