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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 %73 <br /> ID <br /> IAnalytical 819 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton / 971117 M1 <br /> w 1880 Rogers Ave Matrix Liquid <br /> -.San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9711 F35-02, 9711 F37-11-12 Reported Dec 16, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Methanol Ethanol Iso-Propanol <br /> OC Batch#. GC1201971SHSHSA GC1201971SHSHSA GC1201971SHSHSA <br /> Analy Method' ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst' T Tran T Tran T Tran <br /> M S/MSD# 9711 C8303 9711 08303 9711 C8303 <br /> Sample Conc : N D N D N D <br /> Prepared Date 12/1/97 12/1/97 12/1/97 <br /> Analyzed Date 12/1/97 12/1/97 12/1/97 <br /> Instrument LD#' GCV1 GCV1 GCV1 <br /> Conc Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result: 79 87 84 <br /> MS % Recovery 99 109 105 <br /> Dup. Result: 78 85 81 <br /> MSD % Recov. 98 106 101 <br /> RPD- 13 23 36 <br /> RPD Limit- 0-50 0-50 0-50 <br /> LCS #. BLK120197 BLK120197 BLK120197 <br /> Prepared Date 12/1/97 12/1/97 12/1/97 <br /> Analyzed Date. 12/1/97 12/1/97 12/1/97 <br /> Instrument LD #- GCV1 GCV1 GCV1 <br /> Conc. Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result: 80 82 79 <br /> LCS % Recov. 100 103 99 <br /> 50-150 50-150 50-150 <br /> LCS 50-150 50-150 50-150 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> AMSEQUOIA ANALYTIC L 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 If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Peggy Penner <br /> Project Manage **MS Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 97111735 BLA <6> <br />