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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 (510) 988-9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton /970829-S1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San,lose, CA 95112 <br /> Attention Fran Thee Work Order# 9708F00-01-02 Reported Sep 3, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Methanol <br /> OC Batch# GCO902971SHSHSA <br /> Analy Method ISHS <br /> Prep Method: HS <br /> Analyst: T Tran <br /> MS/MSD# 970SD7801 <br /> Sample Conc . NO <br /> Prepared Date. 9/2/97 <br /> Analyzed Date. 9/2/97 <br /> Instrument l D # GCv1 <br /> Conc. Spiked. 8 0 mg/L <br /> Result: 83 <br /> 46S °.6 Recovery- 104 <br /> Dup. Result, 78 <br /> MSD % Recov : 98 <br /> RPD 62 <br /> RPD Limit: 0-50 <br /> LCS#: BLK090297 <br /> Prepared Date: 9/2/97 <br /> Analyzed Date 9/2/97 <br /> Instrument l.D #. GCv1 <br /> Conc. Spiked- 8 0 mg/L <br /> LCS Result. 80 <br /> LCS % Recon : 100 <br /> LCS <br /> Control Limits 50-150 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> I ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure It <br /> the recovery of analytes from the matrix spike does not fail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> g enner <br /> P e Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9708F00 BLA <47 <br />