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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 /> Analytical 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0342 <br /> 1551 Industnal Road San Carlos,CA 94070.4111 (650)232-9600 FAX(650)232-9612 <br /> Sequoia Analytical Client Project ID Y S904159/Chevron #9-6258 <br /> X819 Striker Ave. Suite 8 Matrix Solid <br /> Sacramento, CA 95834 <br /> ,Attention Sandra Hanson Work Order# 9904624 -01-10 Reported Apr 22, 1999 <br /> v} {y +v{+- { �f ` 1� r " r,vn r.r�� r L iy� { v ♦ .v v <br /> vYtiv}[ {{J +l AWt rx, 4{r }. } r v • �♦ a t ry .. L .. ... <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Methanol Ethanol Iso-Propanol <br /> QC Batch# GC0419991SHSHSD GC0419991SHSHSD GC041999[SHSHSD <br /> Analy Method ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst. MM MM MM <br /> MS/MSD #: 990462401 990462401 990462401 <br /> Sample Conc : 26 N D ND <br /> Prepared Date, 4/19/99 4/19/99 4/19/99 <br /> Analyzed Date 4/19/99 4/19/99 4/19/99 <br /> Instrument I D # GCV1 GCV1 GCv1 <br /> Conc.Spiked 8 0 mg/Kg 8 0 mg/Kg 8 0 mg/Kg <br /> Result 31 12 12 <br /> MS% Recovery 63 150 Iso <br /> Dup Result 31 13 13 <br /> MSD % Recov: 63 163 163 <br /> RPD. 00 80 so <br /> RPD Limit, 0-50 0-50 0-50 <br /> ' t v r r � r r. ry~ ~ � }^}~ n v vu r. x e ti ` r} r r ♦+ .. � � {l � v <br /> LCS # LCSO41999 LCSO419N LCSO41M <br /> Prepared Date 4/19/99 4/19/99 4/19/99 <br /> Analyzed Date 4/19/99 4/19/99 4/19/99 <br /> Instrument I D #' GCV1 GCV1 GCV1 <br /> Conic Spiked* 8 o mg/Kg 8 0 mg/Kg 8 0 mg/Kg <br /> LCS Result 87 97 9 8 <br /> LCS %Recov. 109 121 123 <br /> MS/MSD 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 I <br /> 11irtillie,;%th known quaidities of specific compounds and subjected to the et.' analytical proxoure u <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 /> Kayvan Klfnyal J� <br /> Project Manager "*MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9904624 SSS 41> <br />