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ySequoia <br /> 680 Chesapeake Drive Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 15) 404 N Wiget Lane Walnut Creek CA 94599 (51 Q) 988 9600 FAX{510}988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> ?Blaine Tech Services, Inc Client Project ID Chevron 9-8264 /961105-Cl <br /> 1985 Timothy Drive Matrix Liquid <br /> San.lose, CA 95133 <br /> ;Attention Jim Keller Work Order# 9611258-01 Reported Nov 23, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: 2,4-Dmrtro- Pentachloro Pyrene <br /> toluene phenol <br /> QC Batch#- MS1108968270EXA MS110SW270EXA MS1108968270EXA <br /> Analy Method: EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method: EPA 3510 EPA 3510 EPA 3510 <br /> Analyst B Pitamah B Pitamah B Pitamah <br /> MS/MSD#. BLK110896 BLK110896 BLK110896 <br /> Sample Conc . ND ND N D <br /> Prepared Date 11/8/96 11/8/96 11/8/96 <br /> Analyzed Date. 11/11/96 11/11/96 11/11/96 <br /> Instrument I D #: F4 F4 f=4 <br /> Conc Spiked: 200pg/L 200ug/L 200 ug/L <br /> Result 134 119 143 <br /> MS %Recovery 67 60 72 <br /> Dup Result 134 117 138 <br /> MSD % Recov .. 67 59 69 <br /> RPD* 00 17 36 <br /> RPD Limit- 0-30 0-30 0.30 <br /> LCS #• - - <br /> Prepared Date: - - - <br /> Analyzed Date- <br /> Instrument LD #-. - - <br /> Conc. Spiked - <br /> LCS Result - - - <br /> LCS% Recov.. - - <br /> LCS <br /> Control Limits 24-96 9-103 26-127 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA AN 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 11 <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> n interference,the LCS recovery is to be used to validate the batch <br /> eggy Penn **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Mans er Page 3 of 3 9611258 BLA -<5> <br />