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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-%00 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> �QII� Analytical 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)792-1865 FAX(707)79Z-0342 <br /> Pacific Environmental Group Client Project ID 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 /> ANALY 1111-- Reactive Reactive <br /> Cyanide Sulfide <br /> Method SW-846 SW-846 <br /> Analyst M Evans M Evans <br /> Concentration <br /> Spiked: 13 mg/L 50 mg/L <br /> LCS Batch# LCS082898 LCS082898 <br /> Date Prepared 08/28/98 08/28/98 <br /> Date Analyzed. 08/28/98 08/28/98 <br /> Instrument I D# FIA1 Manual <br /> LCS % <br /> Recovery 36 104 <br /> Control Limits 16-57% 70-130% <br /> MSIMSD <br /> Batch #• 9808Co2-1 9808002-1 <br /> Date Prepared 08/24/98 08/24/98 <br /> Date Analyzed 08/24/98 08/24/98 <br /> Instrument I D# FIA1 Manual <br /> Matrix Spike <br /> % Recovery 20 64 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 18 86 <br /> Relative % <br /> Difference 13 32 <br /> Please Note <br /> The LCS is a control sample of known interferent free matnx that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> validation of sample batch results Due to matnx effects,the QC limits for MS/MSD's are advisory only <br /> and are not used to accept or refect batch results <br /> 01-inda C Schneider <br /> Project Manager/Sacramento Laboratory <br /> 5808248 PES e8a <br />