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4 <br /> ® Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364-9600 FAX(650)364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510) 988-9673 <br /> q n alyti cal 819 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921-0100 <br /> Cambria{ Environmental Tech Client Project ID Shell 1071 N-Main,—Manteca n <br /> 114465th St, Ste C Matrix Solid r <br /> Oakland, CA 94608 <br /> Attention Josh Bergstrom Work Order# 9709755 01, 02 Reported Sep 22, 1997` <br /> ,: ,` .�:` �: : , r , nN �r � ,.,, r r �=x; r � v-� r .. •`< „'r' ;`rrv, vNY� l,V n` ! ,' r !r rrr , <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Diesel <br /> QC Batch#: GCO915970HBPEXB <br /> Anally. Method: EPA 8015M <br /> Prep Method: EPA 3550/DHS <br /> Analyst: B Sullivan <br /> MS/MSD# 970951701 <br /> Sample Cone 56000 <br /> Prepared Date- 9/15/97 <br /> Analyzed Date: 9/16/97 <br /> Instrument 11.13 #: GCHP4B <br /> Cone. Spiked: 25 mg/Kg <br /> Result: 50000 <br /> MS %Recovery: -10 <br /> Dup Result. 51000 i <br /> MSD %Recov.. -& <br /> RPD 20 <br /> RPD Limit. 0-50 <br /> ,... .., M , nr+pq ...,.. ,,.v...w.n v,.wgnirvvrS n v�yv r4 v. s. • n'r a nor n <br /> �x `�� � •v{}s {r� ~ „}'r r ~ , r rr `! v n.} 4v L. !',�} v } • r t}uw r fin rr ~ ` i r ,'!�r`t. .. F r • v w 1 `, s , ` I <br /> LCS#- BLK091697 <br /> Prepared Date: 9/16/97 <br /> Analyzed Date: 9/17/97 <br /> Instrument I D.#: GCHP4B <br /> Cone Spiked: 25 mg/Kg <br /> LCS Result: 25 <br /> LCS % Recov 100 <br /> 50-150 <br /> LCS 60-140 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sam pis 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=Matnx Spike,MSD=MS Duplicate,RPD=Relative%Difference 9709755 CCC <2> <br />