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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364-9600 FAX(415) 364-9233 <br /> 4D 404 N Wiget Lane Walnut Creek CA 94598 (510) 989-96W FAX(510)988 9673 <br /> fwl� Analytical 819 Striker 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 2,4-Dinitro- Pentachloro- Pyrene <br /> toluene phenol <br /> OC Batch# MS11o796827oEXB MS1107968270EXB MS1107968270EXB <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 # <br /> Sample Conc <br /> Prepared Date <br /> Analyzed Date: <br /> Instrument 1 D #• <br /> Conc Spiked <br /> Result. <br /> �S % Recovery: <br /> Dup Result <br /> MSD % Recov <br /> RPD- <br /> RPD Limit <br /> LCS # Cs110796 06110796 CB110796 <br /> Prepared Date 11/7/96 11/7/96 11/7/96 <br /> Analyzed Date: 11/9/96 11/9/96 11/9/96 <br /> Instrument I D # H5 H5 H5 <br /> Conc Spiked 3300 pg/Kg 3300yg/Kg 3300Yg/Kg <br /> LCS Result 2400 2100 2500 <br /> LCS % Recov : 73 64 76 <br /> LCS <br /> Control Limits 28-89 17-109 35-142 <br /> Please Note <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the same reagents, <br /> OQUOIA 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 /> K6`V Follett **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager Page 3 of 3 9611216 M <3> <br />