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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 /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921-0 100 <br /> ,-Blaine Tech Services, Inc Client Project ID Shell Stockton % 971224-D1 <br /> 1680 Rogers Ave Matrix Liquid <br /> i}San Jose, CA 95112 <br /> -Attention Fran Thie Work Order# 9712F98-01-03 Reported Jan 14, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol Iso-Propanol <br /> AC Batch# GC1230971SHSHSB GC1230971SHSHSB GC1230971SHSHSB <br /> Analy. Method ISHS EPA 8020 EPA 8020 <br /> Prep Method: HS HS HS <br /> Analyst T Tran T Tran T Tran <br /> MS/MSD# 9712D1505 9712D1505 9712D1505 <br /> Sample Conc : N D N D N D <br /> Prepared Date: 12/30/97 12/30/97 12/30/97 <br /> Analyzed Date 12/30/97 12/30/97 12/30/97 <br /> Instrument I D #. GCv1 GCv1 GCvi <br /> Cone. Spiked 8 0 mg/L 8 0 mg/L 8 0 mg/L <br /> Result 87 91 89 <br /> MS % Recovery 109 114 ill <br /> Dup Result. 91 96 97 <br /> IVISD % Recov. 114 120 121 <br /> RPD. 45 53 86 <br /> RPD Limit: 0-50 0-50 0-50 <br /> LCS # BLK123197 BLK123197 BLK123197 <br /> Prepared Date 12/31/97 12/31/97 12/31/97 <br /> Analyzed Date 12/31/97 12/31/97 12/31/97 <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 83 83 <br /> LCS % Recov. 108 104 104 <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 /> E I ALYTICAL 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 /> Peg y Penn <br /> Proje t Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9712F98 BLA <3> <br />