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i' <br /> i <br /> Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8632 /961105-C2 <br /> 985 Timothy Drive Matrix Liquid <br /> San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9611260-01 Reported Nov 23, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 2,4-Dinitro- Pentachloro- Pyrene <br /> toluene phenol <br /> OC Batch#. MS11OWN270EXA MS1108968270EXA 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 ND <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 LD# F4 F4 F4 <br /> Conc. Spiked 200ug/L 200 ug/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 I D # <br /> Conc Spiked <br /> LCS Result <br /> LCS % Recov • - - - <br /> M <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 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 /> interference,the LCS recovery is to be used to validate the batch <br /> Peggy Penner **NIS=Matrix Spike, MSD=NIS Duplicate, RPD=Relative%Difference <br /> Project Manager Page 3 of 3 9611260 BLA <6> <br />