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Sequoia 680 Chesapeake Drive Redwood Clty CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510)988-9600 FAX(510)988-9673 <br /> T&VAnalytical 819 Striker Avenue,Sulte 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> •i <br /> Cambria Environmental Tech Client Project ID Shell, 341 E Main, Ripon <br /> 1144 65th St, Ste C Matrix Solid <br /> Oakland, CA 94608 <br /> Attention Paul Waite Work Order# 9803L68 01 Reported Apr 15, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Methanol Ethanol Iso-Propanol <br /> QC Batch# GC0401981SHSHSB GC0401981SHSHSB GCO401981SHSHSB <br /> Analy Method ISHS ISHS ISHS <br /> Prep. Method HS HS HS <br /> Analyst T Sears T Sears T Sears <br /> MS/MSD# 9803,15701 9803,15701 9803JS701 <br /> Sample Cone N D N D N D <br /> Prepared Date 4/1/98 4/1/98 4/1/98 <br /> Analyzed Date 4/1/98 4/1/98 4/1/98 <br /> Instrument I.D# GCV1 GCV1 GCV1 <br /> Cone Spiked 8 0 mg/Kg 8 0 mg/Kg 8 0 mg/Kg <br /> Result- 83 91 87 <br /> .MS % Recovery 104 114 109 <br /> Dup Result 89 95 88 <br /> MSD %Recov. 111 119 110 <br /> RPD 70 43 11 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS# BLK040398 BLK040398 BLK040398 <br /> Prepares! Date 4/3/98 4/3/98 4/3/98 <br /> Analyzed Date 4/3/98 4/3/98 4/3/98 <br /> Instrument LD# GCv1 GCV1 GCV1 <br /> Cone. Spiked 8 0 mg/Kg 8 0 mg/Kg 8 0 mg/Kg <br /> LCS Result. 79 93 91 <br /> LCS% Recov 99 116 114 <br /> LCS <br /> Control Limits 70-130 70-130 70.130 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> ep-EQUOIA 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 V <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 /> Richard Heriing <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 98031-68 CCC <1> <br />