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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650)364-9233 <br /> 4D404 N Wiget Lane Walnut Creek,CA 94598 (510)988-9600 FAX(510)988-9673 <br /> Anal <br /> 1C a� 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-0100 <br /> Y a 1455 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 Manteca <br /> 114465th St , Ste C Matrix Solid <br /> Oakland, CA 94608 <br /> Attention Paul Waite Work Order# 9803,157 01, 03, 05, 07, 09 Reported Apr 15, 1998 <br /> - I <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol iso-Propanol <br /> QC Batch# GCO4019SISHSHSB G00401981SHSHSB GCM1981SHSHSB <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 980345701 <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 Lima. 0-50 0-50 0-50 <br /> LCS# BLK040198 BLK040198 BLKMI98 <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 GCvi <br /> Conc Spiked 8 0 mg/Kg 8 0 mg/Kg 8 0 mg/Kg <br /> LCS Result 8 4 90 91 <br /> LCS %1=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 /> APEQUOIA 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 /> Zlca�d Hinterference,the LCS recovery is to be used to validate the batch <br /> eriing <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference 9803J57 CCG 1> <br />