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Sequoia680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wigct Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Touchstone Developments 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 1,2,4-Trichloro- 4-Chloro-3- Acenaphthene 4-Nitrophenol <br /> benzene Methylphenol <br /> OC Batch# MS1107968270EXB MS1107968270EKB 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 B Pitamah B Pitamah B Pitamah <br /> MS/MSD#. <br /> Sample Conc <br /> Prepared Date <br /> Analyzed Date <br /> Instrument t D # <br /> Conc Spiked <br /> Result <br /> �S % Recovery* <br /> Dup Result <br /> MSD % Recov .. <br /> RPD <br /> RPD Limit: <br /> LCS # C8110796 C8110796 C8110796 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 pg/Kg 3300 pg/Kg 3300 pg/Kg 3300 Ng/Kg <br /> LCS Result- 2500 2500 2500 2400 <br /> LCS % Recov 76 76 73 73 <br /> LCS <br /> Control Limits 38-107 26-103 31-137 11-114 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> 110000IA 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 R <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 2 of 3 9611216 TTT <2> <br /> z� <br />