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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364-9600 FAX(415) 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 /> 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# 9511553 -05 Reported Nov 14, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Anaiyte: Phenol 2-Chlorophenoi 1,4-Dichloro N-Nitroso-Di- <br /> benzene N-propylamine <br /> QC Batch# MS1107958270EXA MS1107958270EXA MS1107958270EXA MS1107958270ECA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method. EPA 3550 EPA 35W EPA 35W EPA 3550 <br /> Analyst B Pitamah B Pitamah B Pitamah B Pitamah <br /> MS/MSD # - - - <br /> Sample Cone. - - - <br /> Prepared Date- - - - <br /> Analyzed Date. - - <br /> Instrument I.D.#: - - - - <br /> Cone Spiked- - - - - <br /> Result - <br /> MS %Recovery - - <br /> SDup Result: - - - - <br /> MSD % Recov : - - - - <br /> RPD. - - - <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS #: BLK110795 BLK110795 BLK110795 BLK110795 <br /> Prepared Date 11/7/95 11/7/95 11/7/95 11/7/95 <br /> Analyzed Date 11/7/95 11/7/95 11/7/95 11/7/95 <br /> Instrument 1134. F4 F4 F4 F4 <br /> Cone Spiked. 3300 pg/Kg 3300pg/Kg 3300pg/Kg 3300pg/Kg <br /> LCS Result: 2400 2500 2300 2700 <br /> LCS % Recov : 73 76 70 82 <br /> LCS 5-112 23-134 20-124 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 />. S UOIA 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 /> ark Cargasacchi "'MS=Matrix Spike,MSD=MS Duplicate, RPD-Relative%Difference <br /> Project Manager Page 1 of 3 9511553 TTT <1> <br />