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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233+ <br /> 404 N Wtget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 %73 <br /> Iwo Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 bloo <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton /980112-H2 <br /> <1680 Rogers Ave Matrix Liquid Y <br /> San Jose, CA 95112 <br /> =-Attention Fran Thie Work Order# 9801694-06-09, 9801695-10113 Reported Jan 30, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanof <br /> OC Batch# GCO119981SHSHSB GCO119981SHSHSB GCO119981SHSHSB <br /> Analy. Method: ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Tran T Tran T Tran <br /> MS/MSD #: 980129606 980129606 980129606 <br /> Sample Cone N D N D N D <br /> Prepared Date 1/19/98 1/19/98 1/19/98 <br /> Analyzed Date 1/19/98 1/19/98 1/19/98 <br /> Instrument I D #- GCv1 GCv1 GCv1 <br /> Cone. Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 74 76 72 <br /> MS % Recovery- 93 95 90 <br /> Dup. Result- 72 76 74 • <br /> MSD % Recov. 90 95 93 <br /> RPD 27 00 27 <br /> R-P_D_Limit..0-50 0-50 —a50 <br /> LCS #. BLK012098 BLK012098 BLK012098 <br /> Prepared-Date -- i/2o/98- - - — i%zo%se - -- 1/20/98 - --- - --- - - - - — - <br /> Analyzed Date 1/24/98 1/20/98 1/20/98 <br /> Instrument I D #. GCv1 GCv1 GCv1 <br /> Cone Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> LCS Result. 86 86 86 <br /> LCS % Recov 108 108 108 <br /> LCS <br /> Control Limits 50-150 50-150 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 /> S 11 ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sampl <br /> fortified with known quantities of specific compounds and subjected to the entire analytical procedure <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 /> 9y ene <br /> P ect ager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative% Difference 9801694 Bf_A <2> <br />