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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Q0Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)79Z-1865 FAX(707)792-0342 <br /> 4P <br /> Pacific Environmental Group Client project 10 Tosco 5417, Manteca, CA <br /> 11315 Sunrise Gold Circle, Ste M Matrix Water <br /> Rancho Cordova, CA 95742 <br /> Attention Mike Mitchener QC Sample Group S808248 Reported Sep 3, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Flashpoint <br /> Method EPA 1010 <br /> Analyst L DeCardenas <br /> Concentration <br /> Spiked 27^C <br /> LCS Batch# LCS082798 <br /> Date Prepared- 08/27/98 <br /> Date Analyzed 08/27/98 <br /> Instrument I D# Manual <br /> LCS % <br /> Recovery 104 <br /> Control Limits 80-120% <br /> Duplicate <br /> Batch # 9808GO4-01 <br /> Date Prepared 08/27/98 <br /> Date Analyzed 08/27/98 <br /> Instrument I D# Manual <br /> Sample <br /> Concentration >100'C <br /> Sample <br /> Duplicate <br /> Concentration >1009C <br /> Relative % <br /> Difference 00 <br /> Control Limits 0-20% <br /> SEQUOIA ANALYTICAL Please Note <br /> The LCS is a control sample of known interferent free matrix that is analyzed using the same reagents, <br /> preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> validation of sample batch results Due to matrix effects the QC limits for duplicates are advisory only <br /> Linda C Schneider and are not used to accept or reject batch results <br /> Project Manager/Sacramento Labor <br /> S808248 PES 47> <br />