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Sequoia 680sapeake Drive Redwood City,CA 94 (650)364-9600 FAX(650) 364-9233 <br /> 4D404 N.Wiget Lane Walnut Creek,CA 9459 (925)988-9600 FAX(925)988-9673 <br /> 4 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> G <br /> ` <br /> : .. ; ...............................................................ettler R <br /> yanClient Project D Tods co BP 11193 StocktonCA <br /> .::3164 Gold Camp Dr., Suite 240 Matrix: Soil <br /> Rancho Cordova, CA 95670 <br /> ::::Attention: Todd Del Frate QC Sample Group: S812361 Reported: Jan 5, 1999::;: <br /> QUALITY CONTROL DATA REPORT <br /> Lead <br /> Method: EPA 6010A <br /> Analyst: PET <br /> Concentration <br /> Spiked: 50.0 mg/kg <br /> LCS Batch#: 8120697-BS1 <br /> Date Prepared: 12/31/98 <br /> Date Analyzed: 12/31/98 <br /> Instrument I.D.#: - <br /> LCS % <br /> Recovery: 89.2 <br /> Control Limits: 80.0-120 <br /> MS/MSD <br /> Batch#: P812410-01 <br /> Date Prepared: 12/31/98 <br /> Date Analyzed: 12/31/98 <br /> Instrument I.D.#: - <br /> Matrix Spike <br /> % Recovery: 86.9 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 88.6 <br /> Relative% <br /> Difference: 1.94 <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 /> 2h��J and are not used to accept or reject batch results. <br /> Linda C. Schneider <br /> Project Manager/Sacramento Laboratory <br /> { S812361.GRR <2> <br /> '� <br />