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Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> 6 a- ) (916)921-9600 <br /> Analytical www 5equFAX qubilabs alabs c 00 <br /> com <br /> Gettler-Ryan-Rancho Cordova Project Tosco 6981, Stockton,CA Sampled 4126100 <br /> 3164 Gold Camp Dr,Ste 240 Project Number NIA Received 4127100 <br /> Rancho Cordova,CA 95670 Project Manager Mike Mitchener Reported 511 11100 <br /> Volatile Oxygenate Compounds by EPA Method 8260A/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> lAnalyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0050050 Date Prepared 515100 Extraction Method EPA 5030E IMeOHI <br /> Blank 0050050-BLKI <br /> Tert-butyl alcohol 515100 ND mg/kg 100 <br /> Methyl tert-butyl ether ND 0 100 <br /> Di-isopropyl ether ND 0 100 <br /> Ethyl tert-butyl ether ND 0 100 <br /> Tert-amyl methyl ether ND 0 100 <br /> Ethanol ND 150 <br /> 1,2-Dichloroethane ND 0100 <br /> Ethylene dibromide ND 0 100 <br /> I <br /> Surrogate 1 2-DCA-d4 250 256 600-140 102 <br /> i <br /> LCS 0050050-BSI <br /> Methyl tert-butyl ether 515100 250 247 mg/kg 700-130 988 <br /> j S to 1,2-DCA44 250 277 600-140 111 <br /> Matrix Spike 0050050-MS1 5004348-01 <br /> Methyl tert-butyl ether 5/5100 250 ND 232 mg/kg 600-140 928 <br /> Surrogate 1 2-DCA-d4 11250 265 PF 600-140 106 <br /> Matrix Spike Dup 0050050-MSDI 5004348-01 <br /> Methyl tert-butyl ether 515100 250 ND 234 mg/kg 600-140 936 250 0 858 <br /> Surrogate 1,2-DCA-d4 250 268 600-140 107 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 15 of 16 <br />