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151 Industrial Road <br /> Sequoia San Carl s5 CA 94070-411 11 <br /> (650) 232-9600 <br /> Analytical <br /> FAX(650) 232-9612 <br /> II <br /> Blame Tech Services Project Shell(1) Sampled 5/13/99 <br /> 1680 Rogers Avenue Project Number Shell 6131 Pacific Ave,Stockton Received 5/14/99 <br /> San Jose,CA 95112 Project Manager Fran Thie Reported 6/22/99 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260A/Quahty Control <br /> Sequoia Analytical-San Carlos <br /> Date Spike Sample QC Reporting Limit Recov RPD RAD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 9050097 Date Prepared 5/21199 Extraction Method EPA 50308 P/T <br /> Blank 9050097-BLK1 <br /> Ethanol 5/21/99 ND ug/1 1000 <br /> Tert-butyl alcohol itND 200 <br /> Methyl tent-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl tert-butyl ether ND 200 <br /> _Tert-amyl methyl ether ND 200 <br /> Surrogate 1 2-Dichloroethane-d4 Soo 498 760-114 996 <br /> Blank 9050097-BLK2 <br /> Ethanol 5/24/99 ND ug/l 1000 <br /> Tert-butyl alcohol I. ND 200 <br /> Methyl tert-butyl ether NO 200 <br /> ropyl ether NO 200 <br /> ElWert-butyl ether NO 200 <br /> Tert-amyl methyl ether NO _ _ 200 <br /> Surrogate 12-Dichloroethane-d4 500 549 760-114 110 <br /> LCS 9050097-BSI <br /> Methyl tert-butyl ether 5/21/99 __ 50 0 459 ug/l 700-130 918 <br /> Surrogate 1 2-Drchloroethane-d4 SO 0 521 to 760-114 104 <br /> LCS 9050097-BS2 <br /> Methyl tert-butyl ether 5/24/99 500 492 ug/l 700-130 984 <br /> Surrogate 1,2-Drchloroethane-d4 500 538 If 760-114 108 <br /> Matnx Spike 9050097-MSI L905245-06 <br /> Methyl tent-butyl ether 5121/99 500 305 75 1 ug/1 600-140 892 <br /> Surrogate 12-Drchloroethane-d4 1, 500 534 if 760-114 107 <br /> Matrix Spike Dug) 9050097-MSD1 L905245-06 <br /> Methyl tent-butyl ether 5/21/99 Soo 305 778 ug/l 600-140 946 25 0 588 <br /> Surrogate 1,2-Drchloroethane-d4 If 500 538 760-114 108 <br /> Batch 9050110 Date Prepared 5/24199_ Extraction Method EPA 5030B FP/T1 <br /> Blank 9050110-BLK1 <br /> 1,2-Dichloroethane 5/24/99 NO ug/l 200 <br /> Ethanol NO IP 1000 <br /> Tert-butyl alcohol NO 200 <br /> Methyl tert-butyl ether NO it 200 <br /> propyl ether It <br /> NO 200 <br /> Sequoia Analytical-San Carlos *Refer to end of report for text of notes and definitions <br /> Page 14 of 16 <br />