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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 /> r <br /> Touchstone Developments Client Project ID 8264-2, Chevron 9-8264 <br /> P 0 Box 2554 Matrix Solid <br /> Santa Rosa, CA 95405 <br /> Attention Jeff Monroe Work Order # 9511A10-02 Reported Nov 27, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte 2 4-Dinitro- Pentachloro- Pyrene <br /> toluene phenol <br /> QC Batch# MS1116958270EXA MS1116958270EXA MS1116958270EXA <br /> Analy Method EPA 8270 EPA 8270 EPA 8270 <br /> Prep Method EPA 3550 EPA 3550 EPA 3550 <br /> Analyst B Pitamah B Pitamah B Pitamah <br /> MS/MSD # 9511Al002 9511A1002 9511A1002 <br /> Sample Conc ND ND NO <br /> Prepared Date 11/16/95 11/16/95 11/16/95 <br /> Analyzed Date 11/17/95 11/17/95 11/17/95 <br /> Instrument I D # F4 F4 F4 <br /> Conc Sptked 3300Ng/Kg 3300 Hg/Kg 3300 ug/Kg <br /> Result 2300 1700 3100 <br /> MS % Recovery 70 52 94 <br /> D u p Result 2300 1700 2900 <br /> MSD % Recov 70 52 88 <br /> RPD 00 00 67 <br /> RPD Limit 0-50 0-50 0-50 <br /> LCS # BLK111695 BLK111695 BLK111695 <br /> Prepared Date 11/16/95 11/16/95 11/16/95 <br /> Analyzed Date 11/17/95 11/17/95 11/17/95 <br /> Instrument I D # F4 F4 F4 <br /> Conc Spiked 3300 ug/Kg 3300pg/Kg 3300 ug/Kg <br /> LCS Result 2200 1600 2800 <br /> LCS % Recov 67 48 85 <br /> MS/MSD <br /> LCS 39139 14-176 52-115 <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 /> SE 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 /> Mark Cargasacchl **MS=Matrix Spike MSD=MS Duplicate, RPD=Relative%Difference <br /> Project Manager Page 3 of 3 9511 A10 TTT 44> <br />