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* Sequoia 680 Chesapeake Drive Redwood City, CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> 404 H Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510)988-9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921-9600 FAX(916)911 0100 <br /> Gettler Ryan/Geostrategies r ' v `Clierit <br /> Project IDf Unocal <br /> -6747 Sierra Court, Ste J Matrix Liquid Y' <br /> {Dublin, CA 94568 <br /> Yn <br /> Attention Deanna Harding Work Order# 9803G82-02-091 <br /> Reported Apr 15 1998 # <br /> w.x...>•.v,:r„f�.y,G 7.w.,...�t 4>r! . .e-4 ' ..,y ,t ,}�- ,r, <br /> } ?} <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Diesel <br /> QC Batch#' GCO327980HBPEXB <br /> Analy. Method: EPA 8015M <br /> Prep. Method EPA3510 <br /> Analyst- A Porter <br /> BS/BSD # BLK032798 <br /> Sample Cone N D <br /> Prepared Date 3/27/98 <br /> Analyzed Date 3/31/98 <br /> Instrument I D #. GCHP19 <br /> Cone. Spiked 100ppg/L <br /> Result 800 <br /> BS % Recovery so <br /> p Result 780 <br /> B % Recov 78 <br /> RPD 25 <br /> RPD Limit 0.50 <br /> LCS# <br /> Prepared Date <br /> Analyzed Date <br /> istrument I D# <br /> Cone. Spiked <br /> LCS Result <br /> LCS % Recov .. <br /> %150 <br /> LCS 60-140 <br /> Control Limits <br /> Please Nate <br /> The LCS is a control sample of known,interferent-free matrix that is analyzed using the sats, <br /> fregory <br /> ICAL, preparation,and analytical methods employed for the samples The matrix spike is an aiimquo#ofrean <br /> sem iLYTe geefortified with known quantities of specific compounds and subjected to the entire analytical procedurepoif <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 /> oject Manager '*MS-Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> 9803G82 Gt;i' <7> <br />