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Sequoia 680 Chesapeake Drive Redrjood City, CA 94063 (415) 364 9600 FAX(415)364 9233 <br /> ID 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> fr�Il� Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Touchstone Developments h Client Project ID Chevron 9-2033, 2033-2 <br /> P O Box 2554 Matrix Solid <br /> Santa Rosa, CA 95405 <br /> Attention Jeff Monroe Work Order# 9611216 01 Reported Nov 14, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Phenol 2-Chlorophenol 1,4-Dichloro- N-Nitroso-Di- <br /> benzene N-propylamine <br /> QC Batch# MS11o7968270EXB MS1107968270EXB MS1107968270EXB MS1107968270EXB <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 8 Pitamah B Pitamah B Pitamah <br /> MS/MSD#. <br /> Sample Conc <br /> Prepared Date <br /> Analyzed Date- <br /> Instrument 1.10 # <br /> Conc Spiked. <br /> Result <br /> 40S% Recovery: <br /> Dup. Result. <br /> MSD % Recov <br /> RPD <br /> RPD Limit- <br /> LCS # CB110796 C131 10796 C131 10796 CB110796 <br /> Prepared Date 11/7/96 11/7/96 11/7/96 11/7/96 <br /> Analyzed Date 11/9/96 11/9/96 11/9/96 11/9/96 <br /> Instrument I D # H5 H5 H5 H5 <br /> Conc Spiked 3300 ug/Kg 3300 ug/Kg 3300 ug/Kg 3300 Y9/K9 <br /> LCS Result- 2200 2400 2300 2400 <br /> LCS % Recov 67 73 70 73 <br /> LCS <br /> Control Limits 26-90 25-102 28-104 28-104 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> *7. ;j 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 /> Kevin Follett **MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference <br /> Project Manager Page 1 of 3 9611216 TTT <1> <br />