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Sequoia680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 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 0100 <br /> IQF• <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-8264 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Worm Order # 9802909-01 Reported Feb 27, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Anaiyte 1 2 4-Trlchloro- 4-Chloro-3- Acenaphthene 4-Nitrophenol <br /> benzene Methylphenol <br /> QC Batch# MS0213988270EXA MS0213988270EXA MS0213988270EXA MS0213988270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3510 EPA 3510 EPA 3510 EPA 3510 <br /> Analyst E Manuel E Manuel E Manuel E Manuel <br /> MS/MSD # 980271301 980271301 980271301 980271301 <br /> Sample Conc N D ND ND N D <br /> Prepared Date 2/13/98 2/13/98 2/13/98 2/13/98 <br /> Analyzed Date 2/17/98 2/17/98 2/17/98 2/17/98 <br /> Instrument I D # F4 F4 F4 F4 <br /> Conc Spiked 200 ug/L 200ug/L 200pg/L 200 ug/L <br /> Result 114 156 146 78 <br /> MS % Recovery 57 78 73 39 <br /> is Dup Result 106 145 139 70 <br /> MSD % Recov 53 73 70 35 <br /> RPD 73 73 49 11 <br /> RPD Limit 0-30 0-30 030 0-30 <br /> LCS # LCS021898 LCS021898 LCS021898 LCS021898 <br /> Prepared Date 2/18/98 2/18/98 2/18/98 2/18/98 <br /> Analyzed Date 2/18/98 2/18/98 2/18/98 2/18/98 <br /> Instrument I D # H5 H5 H5 H5 <br /> Conc Spiked 200 W91L 200 ug/L 200 ug/L 200 u9/L <br /> LCS Result 175 162 155 71 <br /> LCS % Recov 88 81 78 36 <br /> LCS <br /> Control Limits 39-98 23-97 46-118 10-80 <br /> Please Note <br /> The LCS is a control sample of known interferent-free matrix that is analyzed using the same reagents, <br /> EQ I 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 gy net <br /> *'MS=Matrix Spike, MSD=MS Duplicate, RPD=Reiative% Difference <br /> Pr a Manager Page 2 of 3 9802909 BLA <6> <br />