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819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> ` equoia (916)921-9600 <br /> FAX(916) 921-0100 <br /> Analytical www sequoialabs corn <br /> wr <br /> SECOR International -Rancho Cordova Project ARCO 2093,1 racy,CA Sampled 9/29/00 to 1012/00 <br /> 3017 Kilgore Road, Suite 100 Project Number NIA Received 10/2/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 10/16/00 <br /> Miscellaneous Analyses/Quality Control <br /> Sequoia Analytical-Walnut Creek <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br />!Analyte Analyzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Batch 0J03013 Date Prepared 10/2/00 Extraction Method General Pre <br /> Blank 0J03013-BLK1 <br /> Methane 1012/00 ND mg/1 50 <br /> Butane ND 50 <br /> Propane ND 5 0 <br /> Ethane ND 5 0 <br /> Pentane ND 5 0 <br /> Hexane ND 5 0 <br /> LCg 0J03013-BS1 <br /> Methane 10/2/00 989 990 mg/1 80-120 100 <br /> Butane 985 876 0-200 88 9 <br /> Propane 1010 888 0-200 879 <br /> E 1000 941 " 0-200 941 <br /> e 973 857 0-200 88 1 <br /> Hexane 961 966 0-200 101 <br /> )!CS Dup 0J03013-BSD1 <br /> Methane 10/2/00 989 983 mg/l 80-120 99 4 30 0710 <br /> Butane 985 994 0-200 101 200 126 <br /> Propane 1010 1220 0-200 121 200 31 5 <br /> Ethane 1000 965 0-200 965 200 252 <br /> Pence 973 940 0-200 966 200 924 <br /> Hexane 961 969 0-200 101 200 0 310 <br /> u licate 0J03013-DUP1 S010002-01 <br /> Methane 1012/00 13 270 mg/1 30 70 0 2 <br /> Butane ND ND 30 <br /> Propane ND ND 30 <br /> Ethane ND ND 30 78 3 2 <br /> Pentane ND ND 30 <br /> Hexane ND ND 30 <br /> 9 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 7 of 8 <br />