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Sequoia 690 Chesapeake Drive Redwood City,CA 94063 (650)364-9600 FAX(650)364-9233
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<br /> 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)792-0341
<br /> 1551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612
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<br /> IT'PEGJ Clienf Project iD. TOSCO#4409, Stockton;"CA`
<br /> v_11315 Sunrise Gold Circle, Ste. M Matrix: Extract ¢$
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<br /> Rancho Cordova, CA 95742
<br /> rAttention: Kathleen Waldo CC Sample Group: S90419'1 Reported: Apr 19, 1999;}
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<br /> QUALITY CONTROL DATA REPORT
<br /> ANALYTE STLC
<br /> Lead
<br /> Method: EPA 200.7
<br /> Analyst: J.Kelly
<br /> Concentration
<br /> Spiked: 10.0 mg/L
<br /> LCS Batch#: LCSO41999
<br /> Date Prepared: 04/19/99
<br /> Date Analyzed: 04/19/99
<br /> Instrument I.D.#: Mv-1
<br /> l+ %
<br /> Recovery: 97
<br /> Control Limits: 80-120%
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<br /> MS/MSD
<br /> Batch#: 9041494
<br /> Date Prepared: 04/19/99
<br /> Date Analyzed: 04/19/99
<br /> instrument I.D.#: MV-4
<br /> Matrix Spike
<br /> %Recovery: 140
<br /> Matrix Spike
<br /> Duplicate%
<br /> Recovery: 140
<br /> Relative%
<br /> Difference: 0.0
<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 /> 6 validation of sample batch results. Due to matrix effects,the QC limits for MS/Murs are advisory only
<br /> '�61
<br /> 4 _/_1 and are not used to acts or re ect batch results.
<br /> Sandra R. Hanson
<br /> Project Manager/Sacramento Laboratory
<br /> S904191.PES <2>
<br />
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