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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364 9600 FAX(650)364-9233 <br /> (D 404 N Wiget Lane Walnut Creek CA 94598 (SIO) 988 9600 FAX(510)9$8 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 9-2033 /980209-A2 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9802713-01-03 Reported Mar 4, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 1,2,4-Trichloro- 4-Chloro-3- Acenaphthene 4-Nitrophenol <br /> benzene Methylphenoi <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 ND N D N D ND <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 200 pg/L 200 Ng/L 200,ug/L <br /> Result 114 156 146 78 <br /> MS % Recovery 57 78 73 39 <br /> 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 0-30 0-30 <br /> LCS # LCS021398 1-CS021398 LCS021398 LCS021398 <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 11.113 # F4 F4 F4 F4 <br /> Conc Spiked 200 pg/L 200 ug/L 200,ug/L 200 ftg/L <br /> LCS Result 105 142 135 66 <br /> LCS %Recov 53 71 68 33 <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 /> DUOIA 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 r'� **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference <br /> Project Manager Page 2 of 3 9802713 BLA <I> <br />