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i <br /> Ile <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 Project ID Top Filling Method EPA 5030/8260 <br />' of Northern California Reference Number 5034 Instrument ID IIP 5972 MS <br /> 837 Shaw Road Matrix Water Prepared 09-11-02 <br /> Stockton CA 95215 Analyst Clan J Cone Analyzed 09-11-02 <br /> Attn Tim Cuellar Reported 09-12-02 <br /> QUALITY CONTROL DATA REPORT <br /> ISPIKE ID VWMS-9112 <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 750 116% 418-168 <br /> I <br /> methyl t-but l ether MTBE 050 ND 250 856% 624-127 <br /> Dnsopropyl ether DIPS 050 ND 250 996% 514-151 <br /> Ethyl t-But I ether(ETBE) 050 ND 250 100% 574-138 <br /> t-Am #methyl ether(TAME) 050 ND 250 868% 602-122 <br /> 1 2-Dichloroethane 1,2-DCA 050 ND 250 972% 697-124 <br /> Ethylene dibromide EDB 050 ND 250 109% 763-127 <br /> Surrogates <br /> 1 2-Dichloroethane-d4 100 883% 100 884% 52 9-141 <br /> IleToluene-d8 1 100 103% 100 976% 764-129 <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) 750 986% 144% 418-168 355% <br /> I <br /> Methyl t-but I ether (MTBE) 250 852% 896% 624-127 475% <br /> Diiso ro I ether(DIPE) 250 988% 964% 51 4-151 239% <br /> Ethyl t-But I ether ETBE 250 104% 108% 574-138 4 11% <br /> t-Am l methyl ether TAME 250 772% 844% 602-122 800% <br /> I 1,2-Dichloroethane 1,2-DCA 250 992% 100% 697-124 107% <br /> Ethylene dibromide(EDB) 250 992% 110% 763-127 105% <br /> Surro ate <br /> 1 2-Dichloroethane-d4 100 102% 933% 529-141 920% <br /> Toluene-d8 100 103% 9897/o 764-129 1 3 77%En <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 OC limits and recoveries for MS/MSD's are advisory only and are not used to accept or <br /> refect batch results <br /> C"6qt/- <br /> I ANALYST APPROVED BY 2�s=zd <br /> Clan J Cone JX, Phillips <br /> aboratory Director <br /> I <br />