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*� Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N W,get Lane Walnut Creek CA 94598 (510) 98B 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 9-8632/950907-Ki <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 1,2,4-Trichloro 4-Chloro-3 Acenaphthene 4-Nitrophenol <br /> benzene Methylphenol <br /> QC Batch# MS0912958270EXZ MS0912958270EXZ MS0912958270EXZ MS0912958270EXZ <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3520 EPA 3520 EPA 3520 EPA 3520 <br /> Analyst B Pitamah B Pitamah B Pitamah B Pitamah <br /> MS/MSD# 950931302 950931302 950931302 950931302 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 9/12/95 9/12/95 9/12/95 9/12/95 <br /> Analyzed Date 9/19/95 9/19/95 9/19/95 9/19/95 <br /> Instrument I D # F4 F4 F4 F4 <br /> Conc. Spiked 200Ng/L 200 ug/L 200 Ng/L 200pg/L <br /> Result 130 130 110 170 <br /> • MS % Recovery. 65 65 55 85 <br /> Dup Result 120 120 110 170 <br /> MSD % Recov 60 60 55 85 <br /> RPD 80 80 00 00 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS# BLK091295 BLK091295 BLK091295 BLK091295 <br /> Prepared Date 9/12/95 9/12/95 9/12/95 9/12/95 <br /> Analyzed Date 9/20/95 9/20/95 9/20/95 9/20/95 <br /> Instrument LD # H5 H5 H5 H5 <br /> Conc Spiked- 200 yg/L 200 pg/L 200 pg/L 200 yg/L <br /> LCS Result 110 130 99 140 <br /> LCS % Recov. 55 65 5o 70 <br /> LCS 44-142 22-147 47-145 DL-132 <br /> Control Limits <br /> I <br /> Please Note <br /> The LCS 1s a control sample of known,interferent-tree matrix that is analyzed using the same reagents, <br /> SEQ lA NALYTICAL 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 /> P r **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager Page 2 of 3 9509502 BLA s7> <br />