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Sequoia 680 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 /> fwI>� Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921 0100 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707) 792-0342 <br /> Blaine Tech Services, Inc Client Project ID Chevron 9-2033 /980521-L1 <br /> 1680 Rogers Ave Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9805E75-01 Reported Jun 9, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Phenol 2-Chlorophenol 1,4-Dichloro- N-Nitroso-Di- <br /> benzene N-propylamine <br /> QC Batch# MS0526988270EXA MS0526988270EXA MS0526988270EXA MS0526988270EXA <br /> Analy 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# 9805E7501 9805E7501 9805E7501 9805E7501 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 5/26/98 5/26/98 5/26/98 5/26/98 <br /> Analyzed Date 5/27/98 5/27/98 5/27/98 5/27/98 <br /> Instrument I D # F4 F4 F4 F4 <br /> Conc Spiked 400 ug/L 400ftg/L 400 ug/L 400ug/L <br /> Result 112 245 226 246 <br /> �S % Recovery 28 61 57 62 <br /> Dup Result 285 217 223 238 <br /> MSD %Recov 71 54 56 60 <br /> RPD 87 12 13 33 <br /> RPD Limit 0-30 0-30 0-30 0-30 <br /> LCS # LCS052698 LCS052698 LCS052698 LCS052698 <br /> Prepared Date 5/26/98 5/26/98 5/26/98 5/26/98 <br /> Analyzed Date 5/27/98 5/27/98 5/27/98 5/27/98 <br /> Instrument I D # F4 F4 F4 F4 <br /> Conc Spiked 400 ug/L 400 ug/L 400 ug/L 400 ug/L <br /> LCS Result, 115 241 216 238 <br /> LCS % Recov 29 60 54 60 <br /> LCS <br /> Control Limits 12-110 27-123 36-97 41-116 <br /> Please Note <br /> The LCS is a control sample of known, interferent-free matrix that is analyzed using the same reagents, <br /> /WollectManager <br /> 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 /> ry **MS=Matrix Spike MSD=MS Duplicate RPD=Relative%Difference <br /> Page 1 of 3 9805E75 BLA ¢4> <br />