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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> �> 404 N Wi et Lane Walnut Creek CA 94598 <br /> g (510) 988-9600 FAX (510) 988-9673 <br /> Analytical <br /> ical 819 Stnker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX (916) 921-0100 <br /> Cambria Environmerrtal Tech Client Project ID n Shell 1071 N Main, Manteca n <br /> Y <br /> 114465th St, Ste C Matrix Liquid <br /> Oakland, CA 94608 <br /> Attention Josh Bergstrom Work Order# 9709770 05 Reported Sep 26, 1997 <br /> i x y r rt v r v r nv rM14 ,• • r r te •} ,• <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' Mercury <br /> QC Batch# ME0922977470M4A <br /> Analy. Method, EPA 7470 <br /> Prep. Method EPA 7470 <br /> Analyst: M Heid <br /> MS/MSD#: 970957203 <br /> Sample Conc.: N D <br /> Prepared Date: 9/22/97 <br /> Analyzed Date- 9/22/97 <br /> Instrument I.D # MPE4 <br /> Conc.Spiked 0 0040 mg/Kg <br /> Result: 00036 <br /> MS % Recovery: 90 <br /> Dup. Result: 00037 <br /> MSD %Recov.• 93 <br /> RPD 27 <br /> RPD Limit: 0-20 <br /> r rr h i r rM1 t i 4vn y r rr r v ryr ri r v i . ~ ry vv r r r r <br /> LCS# BLK092297 <br /> Prepared Date: 9/22/97 <br /> Analyzed Date: 9/22/97 <br /> Instrument LD #- MPE4 <br /> Conc Spiked. o oo4o mg/Kg <br /> LCS Result- 00037 <br /> LCS %Recov. 93 <br /> LCS <br /> Control Limits 75-125 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA AL ICAL preparation,and analytical methods employed for the samples The matrix spike 1s 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 <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9709770 CCG <3> <br /> 0S <br />