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Sequoia 680 Chesapeake Dnve Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988 9600 FAX(5io)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)921 0100 <br /> i <br /> Touchstone Developments Client Project ID Chevron 9-8264/8264-1 <br /> 6280 Stoneridge Mall Rd , B211 Matrix Solid <br /> Pleasanton, CA 94588 <br /> Attention Anne Marie Dockstader Work Order# 9511587-17 Reported Nov 16, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Phenol 2 Chlorophenol 1 4 Dichioro N Nitroso-DE- <br /> benzene N-propylamine <br /> QC Batch# MS1109958270EXA MS1109958270EXA MS1109958270EXA MS1109958270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3550 EPA 3550 EPA 3550 EPA 3550 <br /> Analyst B Pitamah B Pitamah B Pitamah B Pitamah <br /> MS/MSD # 951156001 951156001 951156001 951156001 <br /> Sample Cone ND N D N D N D <br /> Prepared Date 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Analyzed Date 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Instrument I D # H5 H5 H5 H5 <br /> Cone Spiked 3300pg/Kg 3300 ug/Kg 3300 ug/Kg 3300ug/Kg <br /> Result 2200 2200 2100 2300 <br /> MS % Recovery 67 67 64 70 <br /> Dup Result 2100 2200 2000 2200 <br /> MSD % Recov 64 67 61 67 <br /> RPD. 47 00 49 44 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS # BLK110995 BLK110995 BLK110995 BLK110995 <br /> Prepared Date 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Analyzed Date 11/9/95 11/9/95 11/9/95 11/9/95 <br /> Instrument I D # F4 F4 F4 F4 <br /> Cone Spiked 3300)rg/Kg 3300 ug/Kg 3300ug/Kg 3300 ug/Kg <br /> LCS Result 2400 2500 2300 2600 <br /> LCS % Recov 73 76 70 79 <br /> IVIS/MSD <br /> LCS 5-112 23-134 20124 DL-230 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br />. SEQ OIA 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 /> Mar Cargasacchi MS=Matrix spike, MSD=MS Duplicate RPD=Relative% Difference <br /> Project Manager Page 1 of 3 9511587 TTT 47> <br />