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Sequoia680 Chesapeake Dave 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 /> /� nalgtica1 819 Sinker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Cambili Environmental Tech r ClientProjectID r Shell 1071 N Main, Manteca <br /> v <br /> 114465th St, Ste C Matrix Solid <br /> Oakland, CA 94608 <br /> Attention Josh Bergstrom Work Order# 9709755 01, 02 Reported Sep 22, 1997 r <br /> .. vv,.. .. . .,, , » r N .., ry <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch#: GC091697BTEXEXB GC091697STEXD(B GCO91697BTEXEXB GCO91697BTEXEKB GC091697BTEXEXB <br /> Ana ly. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: R Geckler R Geckler R.Geckler R Geckler R Geckler <br /> MS/MSD# 970930814 970930814 970930814 970930814 970930814 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date. 9/16/97 9/16/97 9/16/97 9/16/97 9/16/97 <br /> Analyzed Date: 9/16/97 9/16/97 9/16/97 9/16/97 9/16/97 <br /> Instrument I D #: GCHP22 GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc. Spiked: 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg 12 mg/Kg <br /> Result. 017 017 016 0 47 10 <br /> MS%Recovery, 85 85 80 78 83 <br /> Dup. Result: 0 17 016 016 046 1 0 <br /> MSD%Recov.: 85 80 so 77 83 <br /> RPD: 00 61 00 22 00 <br /> RPD Limit. 0-25 0-25 0-25 0-25 0-25 <br /> ell rn k rrM1 www+r, �r vYer ry} fn Jn,r,n} rr�vv vt,C yr Cr }M1 r v $ } •v JS vYvr rr r ry nr r~ ,r v t n rY 1 y,+ } ,Y} ,x,r r <br /> LCS#: BLK091797 BLK091797 BLK091797 BLK091797 BLK091797 <br /> Prepared Date: 9/17/97 9/17/97 -9/17/97 9/17/97 9/17/97 <br /> Analyzed Date: 9/17/97 9/17/97 9/17/97 9/17/97 9/17/97 <br /> Instrument I.D.#: GCHP22 GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc. Spiked 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg 1 2 mg/Kg <br /> LCS Result: 017 017 018 051 10 <br /> LCS % Recov.: 85 85 90 85 83 <br /> 60-140 60-140 60-140 60-140 60.140 <br /> LCS 70-130 70-130 70-130 70-130 70-130 <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 /> 4izhard Herhng 1 <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9709755 CCC <1> <br />