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Sequoia 819 Straker Avenue 8 <br /> 958 <br /> Sacramento CA 9S$34 <br /> (916)921-960* <br /> Analytical www (916)921-010* <br /> www sequolalaUs com <br /> i <br /> Stratus Environmental Project ARCO 2168, Stockton, CA Sampled 6122/00 <br /> 3330 Cameron Park Drive,Ste 550 Project Number N/A Received 6/23/00 <br /> Cameron Park,CA 95682 Project Manager Jay Johnson Reported 7111100 <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 /> Analyte Analyzed Level Result Result Units Recov Limits % Limit % /votes* <br /> LCS Dun(continued) 0060288-BSD1 <br /> Suirogate 1,2-DCA-d4 7/3/00 500 - 562 ug/1 600-140 112 <br /> Batch 0060307 Date Prepared 6130100 Extraction Method EPA 5030B [PIT] <br /> Blank 0060307-BLK I <br /> Tert-butyl alcohol 6130100 ND ug/1 200 <br /> Methyl tert-butyl ether ND 200 <br /> Di-isopropyl ether ND 200 <br /> Eilryl tert-butyl ether ND 200 <br /> Ten-amyl methyl ether ND 200 <br /> Ethanol ND 3000 <br /> Surrogate 12-DC,4-d4 50 0 -_ 524 600-140 105 --- <br /> LCS 0060307-BSI <br /> Methyl tert-butyl ether -- 6/30100 500 50 8 ug/1 700-130102 <br /> ate 1,2-DCA-d4 11 50 0 j68 66 0-140— 114 _ --------- - <br /> LCS Dug 0060307-BSD1 <br /> Methyl tert-butyl ether -_ - 6130/00 50 0 _ 498 ug/l 700-130 996 25 0 238 _ <br /> Surrogate 12-DCA-d4 11 500 5 8 600-140 110 <br /> Matrix Spike 0060307-MSI 5006355-02 <br /> Methyl Cert-butyl ether 6/30/00 50 0 _ ND 488 ug/l 600-140 976 <br /> Surrogate 1,2-DCA-d4 500 _ 562 600-140 112 <br /> Matrix Spike Dup 0060307-MSD1 8006355-02 <br /> Methyl tert-butyl ether —_- 6x'30/00 500 ND 492 ug/1 600-140 984 25 0 0 816 _ <br /> Surrogate 1,2-DCA-d4 500 _ 5.) 4 600-140 111 <br /> AOL <br /> S1W.a Analytical-Sac ramellto <br /> Refer to end of report for text of notes and definitions <br /> Page 14 of 15 <br /> z <br />