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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)988-9673 <br /> Analytica 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 /> • <br /> Cambria Environmental Tech Client Project ID Shell 1071 N Main, Manteca <br /> 114465th St , Ste C Matrix Solid <br /> Oakland, CA 94608 <br /> Attention Paul Waite Work Order# 9803J55 04 Reported Apr 13, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Methanol Ethanol Iso-Propanol <br /> QC Batch# GC0401981SHSHSB GCO401981SHSHSB GC0401981SHSHSB <br /> Analy Method iSHS iSHS ISHS <br /> Prep Method HS HS HS <br /> Analyst: T Sears T Sears T Sears <br /> MS/MSD#. 9803J5701 9803J5701 9803,15701 <br /> Sample Conc - 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 /> Conc 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 0-40 0-40 0-40 <br /> LCS#: BLK040198 BLK040198 BLK040198 <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 /> Conc.Spiked 8 0 mg/Kg 8 0 m9/Kg 8 0 mg/Kg <br /> LCS Result 84 90 91 <br /> LCS % Recov 105 113 114 <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 /> �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 if <br /> L 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 Herlmg <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9803J55 CCC <3> <br />