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M <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Waget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510) 988-9673 <br /> Analytical 819 Sinker Avenue,Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX (916) 921-0100 <br /> i. <br /> Cambria Environmental Tech' Client Project ID Shell 1071 N Main, Manteca <br /> 1144 65th St, Ste C Matrix Solid <br /> Oakland, CA 94608 <br /> Attention Josh Bergstrom Work Order# 9709770 01-04 Reported Sep 26, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Diesel <br /> QC Batch# GC0915970HBPEXA <br /> Anally. Method. EPA 8015M <br /> Prep. Method: EPA 3550 <br /> Analyst. B Sullivan <br /> MS/MSD # 970955903 <br /> Sample Conc ' 10 <br /> Prepared Date. 9/15/97 <br /> Analyzed Date: 9/15/97 <br /> Instrument I D #: GCHP4A <br /> Conc Spiked- 25 mg/K9 <br /> Result- 77 <br /> MS %Recovery 268 <br /> Dup. Result. 52 <br /> MSD%Recov.• 208 <br /> RPD' 22 <br /> RPD Limit. 0-50 <br /> LCS#' BLK091697 <br /> Prepared Date: 9/16/97 <br /> Analyzed Date: 9/17/97 <br /> Instrument I.D.#- GCHP413 <br /> Conc Spiked 25 mg/Kg <br /> LCS Result. 21 <br /> LCS % Recov 84 <br /> 50-150 <br /> LCS 60.140 <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 /> SEQUOIA 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 /> Richard Herling <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9709770 CCC <1> <br />