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Sequoia 819 Striker Avenue Suite 8 <br /> Sacramento CA 95834 <br /> Ci) <br /> (916)921-9600 <br /> Analytical www <br /> (916)921-0100 <br /> sequoialabs com <br /> SECOR International-Rancho Cordova Protect ARCO 2093 3 rac), CA Sampled 7/27/00 <br /> 3017 Kilgore Road, Suite 100 Project Number N/A Received 7/28/00 <br /> Rancho Cordova,CA 95670 Project Manager Rusty Benkosky Reported 8/7/00 <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 OH01007 Date Prepared 8/1/00 Extraction Method General Prep <br /> Blank OH01007-BLK1 <br /> Methane 8/1/00 ND mg/i 20 <br /> Butane ND so <br /> Propane ND 5 0 <br /> Ethane ND 5 0 <br /> Pentane ND 5 0 <br /> Hexane ND 5 0 <br /> LCS OH01007-B S 1 <br /> Methane 8/1/00 989 1090 mg/I 65-140 110 <br /> Butane 985 1350 65-140 137 <br /> Propane 1010 1060 65-140 105 <br /> E1000 1080 65-140 108 <br /> P 973 1120 65-140 115 <br /> Hexane 961 1320 65-140 137 <br />_LCS Dua OH01007-BSDI <br /> Methane 8/1/00 989 1010 mg/I 65-140 102 30 762 <br /> Butane 985 1230 65-140 125 30 930 <br /> Propane 1010 985 65-140 975 30 733 <br /> Ethane 1000 990 65-140 990 30 870 <br /> Pentane 973 1010 65-140 104 30 103 <br /> Hexane 961 1200 65-140 125 30 952 <br /> Duplicate OH01007-DUPI S007366-01 <br /> Methane 8/1/00 29 306 mg/1 30 537 <br /> Butane ND ND 30 <br /> Propane 120 119 30 0 837 <br /> Ethane ND ND 30 <br /> Pentane ND ND 30 588 3 <br /> Hexane 7 1 526 30 29 8 <br /> 0 <br /> Sequoia Analytical-Sacramento *Refer to end of report for text ofnotes and definitions <br /> page 7of8 <br />