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680 Chesapeake Drive Redwood Cary CA 94063 (650) 364-9600 FAA(650) 364-9233 <br /> Sequoia 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 /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707) 792-1865 FAX(707)792 0342 <br /> Analytical <br /> Blaine Tech Services, Inc Client Project ID Shell 1071 N Main St r <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 98071-185-01-03, 05 Reported Aug 19, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> OC Batch# GCO731981SHSHSB GC0731981SHSHSB GC073198[SHSHS13 <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Sorokin T Sorokin T Sorokin <br /> MS/MSD# 980789104 980789104 980789104 <br /> Sample Cone N D N D N D <br /> Prepared Date 7/28/98 7/28/98 7/28/98 <br /> Analyzed Date 7/28/98 7/28/98 7/28/98 - <br /> Instrument I D #" GCV1 GCV1 GCV1 <br /> Cone Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 95 12 12 <br /> MS % Recovery 119 150 150 <br /> Dup Result 93 11 11 <br /> MSD % Recov 116 138 138 <br /> RPD 21 87 87 <br /> RPD Limit -o-5o 0-50 0-50 <br /> LCS # BLK073198 BLK073198 BLK073198 <br /> Prepared Date. 7/31/98 7/31/98 7/31/98 <br /> Analyzed Date. 7/31/98 7/31/98 7/31/98 <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, 90 10 _ 11 <br /> LCS % Recov. 113 125 - 138 <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 /> SEG QI 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 /> interference,the LCS recovery is to be used to validate the batch <br /> Peggy enner <br /> Pocct Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 98071-1185 BLA <3> <br />