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Sequoia <br /> 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 T1 WLBet Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical B19 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX (916) 921 0100 <br /> Blaine Tech Services, Inc u Client Project ID Chevron 9-8264 /961105-Cl <br /> '`985 Timothy Drive Matrix Liquid <br /> "San Jose, CA 95133 <br /> Attention Jim Keller Work Order# 9611258-01 Reported Nov 23, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: 1,2,4-Trlchloro- 4-Chloro-3- Acenaphthene 4-Nitrophenol <br /> benzene Methylphenol <br /> QC Batch#: MS1108968270EXA MS1108968270EXA MS1108968270EXA M81108968270EXA <br /> Analy. Method- EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method- EPA 3510 EPA 3510 EPA 3510 EPA 3510 <br /> Analyst B Pitamah B Pitamah B Pitamah B Pitamah <br /> MS/MSD# BLK110896 ELK110896 BLK110896 BLK110896 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 11/8/96 11/8/96 11/8/96 11/8/96 <br /> Analyzed Date: 11/11/96 11/11/96 11/11/96 11/11/96 <br /> Instrument I D #: F4 F4 F4 F4 <br /> Conc Spiked: 200 ug/L 200 ug/L 200ug/L 200ug/L <br /> Result 111 122 130 41 <br /> MS % Recovery 56 61 65 21 <br /> Dup. Result 118 122 130 39 <br /> MSD % Recov. 59 61 65 20 <br /> RPD 61 00 00 50 <br /> RPD Limit* 0-30 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 /> MS/MSD <br /> LCS <br /> Control Limits 39-98 23-97 46 118 10 to 80 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> SEQUOIA A L 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 got fall within specified control limits due to matrix <br /> Interference,the LCS recovery is to be used to validate the batch <br /> Peggy Penn '*MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Mana er Page 2 of 3 9511258 BLA <4> <br />