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• 1' E <br /> 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 /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 FAX(916)921-010 0 <br /> 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792 1865 FAX(707) 792 0342 <br /> 4* <br /> Blaine Tech Services, Inc Ghent 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 2,4-Dinitro- Pentachloro- Pyrene <br /> toluene phenol <br /> CC Batch# MS0526988270EXA MS0526988270EKA MS0526988270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3510 EPA 3510 EPA 3510 <br /> Analyst B Pltamah B Pltamah B Pltamah <br /> MS/MSD# 9805E7501 9805E7501 9805E7501 <br /> Sample Conc N D N D N D <br /> Prepared Date 5/26/98 5/26/98 5/26/98 <br /> Analyzed Date' 5/27/98 5/27/98 5/27/98 <br /> Instrument I D # F4 F4 F4 <br /> Conc Spiked 400 ug/L 400 ug/L 400ug/L <br /> Result 334 344 353 <br /> 40S % Recovery 84 86 88 <br /> Dup Result- 338 374 337 <br /> MSD % Recov 85 94 84 <br /> RPD 12 84 46 <br /> RPD Limit 0-30 0-30 0-30 <br /> LCS # LCS052698 LCS052698 LCS052698 <br /> Prepared Date 5/26/98 5/26/98 5/26/98 <br /> Analyzed Date 5/27/98 5/27/98 5/27/98 <br /> Instrument I D # F4 F4 F4 <br /> Conc Spiked 400ug/L 400 ug/L 400 frg/L <br /> LCS Result 336 321 332 <br /> LCS % Recov 84 80 83 <br /> LCS <br /> Control Limits 24-96 9-103 26-127 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> JWOUOIA 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 fall within specified control limits due to matrix <br /> 1/Z Interference,the LCS recovery is to be used to validate the batch <br /> oregory **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager Page 3 of 3 9805E75 BLA <6> <br />