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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404N Wiget Lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> Big Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-=0 <br /> Analytical 1455 McDowell Blvd North 5te D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br />� v} t .M1 L ry r <br /> "Pacific Environmental Group Client Project IIJ Chevron 9-9840, Sfockton, CA <br /> 11315 Sunrise Gold Circle, Ste M Matrix Soil <br /> Rancho Cordova, CA 95742 f <br /> ' Attention Tim Anenson QC Sample Group S809252 Reported Sep 23, 19W <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Methanol <br /> Method, ISHS <br /> Analyst TS <br /> Concentration <br /> Spiked' 8 0 mg/kg <br /> LCS Batch# ISSLCS2 <br /> 092398 <br /> Date Prepared 09/23/98 <br /> Date Analyzed 09/23/98 <br /> Instrument I D# GCv-01 <br /> LCS % <br /> Recovery 79 <br />*Control Limits 70-130% <br /> MSIMSD <br /> Batch # ISSBO91798 <br /> Date Prepared 09/23/98 <br /> Date Analyzed- 09/23/98 <br /> Instrument I D# GCv-01 <br /> Matrix Spike <br /> % Recovery. 88 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery 88 <br /> Relative % <br /> Difference 00 <br /> 'Please Note <br /> The LCS Is a control sample of known, Interferent free matrix 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 matrix effects,the QC limits for MS/MSD's are advisory only <br /> ��/ !✓����� and are not used to accept or reject batch results <br /> nda C Schn ider <br /> roject Manager/Sacramento Laboratory <br /> S809252 PES <2a <br /> 194, <br />