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• Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> (T) 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)921 Ot00 <br /> Blaine Tech Services, Inc Client Project ID > Chevron 9-8264/970207-H2 V vw <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9702520-01 Reported Feb 26, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte' 1,2,4-Trichioro- 4-Chloro-3- Acenaphthene 4-Nitrophenol <br /> benzene Methylphenol <br /> QC Batch#- MS0213978270EXA MS0213978270EXA MS0213978270EXA MS0213978270EXA <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 # BLK021397 BLK021397 BLK021397 BLK021397 <br /> Sample Cone . ND N D N D N D <br /> Prepared Date 2/13/97 2/13/97 2/13/97 2/13/97 <br /> Analyzed Date- 2/13/97 2/13/97 2/13/97 2/13/97 <br /> Instrument I D#. F4 F4 F4 F4 <br /> Cone Spiked 200 pg/L 200 pg/L 200 Ng/L 200 pg/L <br /> Result 110 140 120 49 <br /> MS % Recovery 55 70 60 25 <br /> Dup Result: 120 150 150 45 <br /> MSD %Recov , 60 75 75 23 <br /> RPD- 87 69 22 85 <br /> RPD Limit 0-30 0-30 0-30 0-30 <br /> LCS#- <br /> Prepared Date: - - - - <br /> Analyzed Date: - - - <br /> Instrument I D #- - - - <br /> Cone. Spiked- <br /> LCS Result <br /> LCS %Recov. <br /> MSIMSD <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 /> IQA A LYTICAL 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 fail within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> ner **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> nager Page 2 of 3 9702520 BLA <5> <br />