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819 Striker Avenue Suite 8 <br /> 41� Sequoia Sacramento CA 95834 <br /> (916)921-9604 <br /> Analytical FAX equo gabs21 co 0 <br /> www segUaialabs com <br /> Stratus Environmental Project ARCO 2186,Stockton, CA Sampled 6/22/00 <br /> 3330 Cameron Park Drive, Ste 550 Project Number N/A Received 6/23/00 <br /> Cameron Park,CA 95682 Prolect Manager Tay Johnson Reported 7/5100 <br /> Volatile Oxygenate Compounds by EPA Method-8260A/Quality Contr"al <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD itPD <br /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0060286 Date Prepared 6/29100 Extraction Method EPA 5030B PTI <br /> Blank 0060286-B LKI <br /> Tert-butyl alcohol 6/29/00 ND ug/l 200 <br /> Methyl tort-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Ethyl Cert-butyl ether ND 200 <br /> fent-amy?methyl ether ND 200 <br /> Ethanol " ND " 3000 <br /> Surrogate 12-DCf1-d4 500 51 4 <br /> 600-140 103 <br /> LCS 0060286-13S1 <br /> Methyl tert-butyl ether 6/29/00 500 500 ug/l 700-130 100 _ <br /> Surrogate 12-DCA-d4 11500 528 " 600-140 106 <br /> LCS DUP 0060286-BSD/ <br /> 1 tcrt-butyl ether 6/29/00 500 496 ug/I 700-130 992 250 0 803 <br /> SW5gate 12-DCA-d4 11 50 0 528 600-140 106 <br /> Matrix Spike 0060286-MSI 5006320-05 <br /> Methyl tort-butyl ether 6129/00 500 _ ND 52 0 ug/l 600-140 104 <br /> Surrogate 1 2-DCA-d4 11 500 538 600-140 108 <br /> Matrix Spike Dup 0060286-MSD1 S006320-05 <br /> Methyl tert-butyl ether 6/29/00 500 ND 53 6 ug/l 600-140 107 250 284 <br /> Sul rogate 12-DCA-d4 11 500 564 11 600-140 113 <br /> Batch 0060307 Date Prepared 6130/00 Extraction Method EPA 5030B [PIT] <br /> Blank 0060307-BLK1 — <br /> Tert-butyl alcohol 6/30x00 ND ug/l 200 <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether " ND 200 <br /> Ethyl tort-butyl ether ND 2 00 <br /> Cert-amyl methyl ether ND 200 <br /> Ethanol ND 3000 <br /> Surrogate 1,2-DCA-d4 500 524 600-140 105 <br /> LCS 0060307-BSI <br /> Methyl tert-butyl ether 6/30/00 500 508 ug/I 700-130 102 <br /> Surrogate 1 2-DCA-d4 50 0 568 60 0-140 1 4 -- <br /> LCS Dun 0060307-BSD1 <br /> Methyl tert-butyl ether 6130100 500 498 ug/l 700-130 99 6 25 0 238 <br /> Se Analytical-Sacrantento *Refer to end ofrepo)t far text ofnotes and definitions <br /> Page 10 of 12 <br />