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L' <br /> Sequoia 660 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> ID 404 N Wiget 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)931 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 1,2,4-Tnchloro- 4 Chloro-3- Acenaphthene 4-Nitrophenol <br /> benzene Methylphenol <br /> QC Batch# MS1108968270EXA MS1108968270EXA MS1108968270EXA MS1108968270EXA <br /> Anally 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 BLK110896 BLK110896 BLK110896 <br /> Sample Conc N D NO 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 200pg/L 200 fig/L 200 fig/L 200,ug/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 /> D <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 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 **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative% Difference <br /> Project Manager Page 2 of 3 9611260 BLA <5> <br />