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ID <br /> Sequoia 680 Chesapeake Dnve Redwood C" 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 /> WAWAnalytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <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 1,24-Trichloro 4-Chloro-3 Acenaphthene 4-Nitrophenof <br /> benzene Methylphenol <br /> QC Batch# MS1116958270EXA MS1116958270EXA MS1116958270EXA MS1116958270EXA <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 # 9511A1002 9511At002 9511A1002 9511A1002 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 11/16/95 11/16/95 11/16/95 11/16/95 <br /> Analyzed Date 11/17/95 11/17/95 11/17/95 11/17,95 <br /> Instrument I D # F4 F4 F4 F4 <br /> Conc Spiked 3300 pg/Kg 3300 pg/Kg 3300 Ng/Kg 3300Ng/Kg <br /> Result 2300 2300 2400 1800 <br /> MS % Recovery 70 70 73 55 <br /> Dup Result 2200 2200 2200 1800 <br /> MSD % Recov 67 67 67 55 <br /> RPD 44 44 87 00 <br /> RPD Limit 0-50 0-50 050 0-50 <br /> LCS # BLK111695 BLK111695 BLK111695 BLK111695 <br /> Prepared Date 11/16/95 11/16/95 11/16/95 11/16/95 <br /> Analyzed Date 11/17/95 11/17/95 11/17/95 11/17/95 <br /> Instrument I D # F4 F4 F4 F4 <br /> Conc Spiked 3300ug/Kg 3300 Ng/Kg 3300jug/Kg 3300,ug/Kg <br /> LCS Result 2400 2300 2400 1500 <br /> LCS % Recov 73 70 73 45 <br /> MS/MSD <br /> LCS 44142 22147 47145 DL-132 <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'Q IA 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 J Cargasacchl **MS=Matnx Spike MSD=MS Duplicate, RPD=Relative% Difference <br /> Project Manager Page 2 of 3 9511A10 TTT �3> <br />