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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 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> .' Anal 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Blaine Tech Services, Inc Client Project ID Shell, 341 East Main St, Ripon <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 - - - - - - - <br /> Attention Fran Thie Work Order# 9902A43 -01 Reported Mar 5, 1999 , <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br />_ QC_Batch# _GC0301991SHSHSB_GCO30199181SB GCO <br /> St 301991SHSHSB <br /> Analy Method" ISHS ISHS _ ISHS <br /> Prep Method. HS HS HS <br /> Analyst- Mm MM mm <br /> MS/MSD# 9902D7701 9902D7701 9902137701 <br /> Sample Cone. N D N D N D <br /> Prepared Date. 3/1/99 3/1/99 3/1/99 <br /> Analyzed Date 3/2/99 3/2/99 3/2/99 <br /> Instrument I D# GCv1 GCv1 GCvi <br /> Cone Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 83 95 97 <br /> MS % Recovery 104 119 121 <br /> Dup Result 81 92 93 . <br /> MSD % Recov 101 115 116 <br /> RPD 24 32 42 <br /> RPD Limit. 0-50 0-50 0-50 <br /> LCS# LCS030199 LCS030199 LG8030199 <br /> Prepared Date 3/1/99 3/1/99 3/1/99 <br /> Analyzed Date 3/1/99 3/1/99 3/1/99 <br /> Instrument I D# GCvi GCvi GCvi <br /> Cone.Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result 80 91 92 <br /> LCS % Recov 100 114 115 <br /> 50-150 50-150 50-150 <br /> -LCS- - 70-130 70-130 '70-130 - <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 /> SEQUOIA 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 If <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> J interference,the LCS recovery is to be used to validate the batch <br /> Mike:G egory **MS-Matrix Spike,MSD=MS Duplicate,RPD=Relative% Difference <br /> P�IectMan ger 9902A43BLA ¢1> <br />