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Sequoia 600 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 /> �a] �Ca� 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916)921-9600 FAX(916)921-0100 <br /> I7 <br /> j 1455 McDowell Blvd North Ste D Petaluma.CA 94954 (707)792-1865 FAX(707)792-0341 <br /> i <br /> Cambria Environmental Tech Client Project ID Shelf 1071 N Main, Manteca <br /> 114465th St, Ste C Matrix Solid <br /> Oakland, CA 94608 <br /> Attention Raul Wade Work Order# 9803J55 01 Reported Apr 13, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Methanol Ethanol lso-Propanol <br /> QC Batch#. GCO401981SHSHSB GCO401981SHSHSB GCO401981SHSHSB <br /> Analy Method: ISHS ISHS ISHS <br /> Prep Method HS HS HS <br /> Analyst T Sears T Sears T Sears <br /> MS/MSD#: 9803J5701 9803,15701 9803J5701 <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 LD # GCv1 GCv1 GCv1 <br /> Conc Spiked 8 0 mg/Kg 8 0 mg/Kg 8 0 me/Kg <br /> Result: 8 3 91 8 7 <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# BLK040298 BLK040298 BLK040298 <br /> Prepared Date: 4/2/98 4/1/98 4/1/98 <br /> Analyzed Date, 4/2/98 4/1/98 4/1/98 <br /> Instrument LD# GCv1 GCv1 GCv1 <br /> Conc Spiked 8 0 mg/Kg 8 0 mg/Kg 8 0 mg/Kg <br /> LCS Result. 73 8 8 8 4 <br /> LCS % Recov: 91 110 105 <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 ANALYTI AL 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 /> Richard Herling **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference <br /> Project Manager 9803.155 CCC <2> <br />