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r ID Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N W.get Lane Walnut Creek, CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> i <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8632/950907-K1 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9509502-01 Reported Sep 19, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 2,4-Dinitro- Pentachloro- Pyrene <br /> toluene phenol <br /> OC Batch# MS0912958270EXZ MS0912958270EXZ MS0912958270EXZ <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 <br /> Prep. Method EPA 3520 EPA 3520 EPA 3520 <br /> Analyst B Pitamah B Pitamah B Pitamah <br /> MS/MSD # 950931302 950931302 950931302 <br /> Sample Conc N D N D N D <br /> Prepared Date 9/12/95 9/12/95 9/12/95 <br /> Analyzed Date 9/19/95 9/19/95 9/19/95 <br /> Instrument I D # F4 F4 F4 <br /> Conc Spiked 2D0 jig/L 200 pg/L 200 ug/L <br /> Result 130 160 82 <br /> MS % Recovery 65 80 41 <br /> Dup Result 120 150 80 <br /> MSD % Recov 60 75 40 <br /> RPD 80 65 25 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS # BLK091295 BLKD91295 BLK091295 <br /> Prepared Date 9/12/95 9/12/95 9/12/95 <br /> Analyzed Date 9/20/95 9/20/95 9/20/95 <br /> Instrument I D # H5 H5 H5 <br /> Conc Spiked: 2Wlig/L 200jug/L 200 pg/L <br /> LCS Result 110 140 130 <br /> LCS% Recov 55 70 65 <br /> LCS 39-139 14-176 52-115 <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 /> MPeggy <br /> NALYTICAL 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 /> er " MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative%Difference <br /> Project Manager Page 3 of 3 9509502 BLA <8> <br />