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4DSequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9604 FAX(415) 364 9233 <br /> 404 N Wiget lane Walnut Creek CA 94598 (510) 988 9600 <br /> X117 Analytical 819 Straker Avenue Suite 8 Sacramento CA 95834 FAX(514)988 9673 <br /> {9!6) 921 9604 FAX(916)921 0100 <br /> Paclflc Environmental Group Client Project ID 310-040 36/2859, Stockton <br /> 2025 Gateway Place, Suite 440 <br /> San Jose, CA 95110 <br /> Attention Chuck York Work Order# 9601974 01, 02 <br /> Reported Jan 23, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> E <br /> lyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> h# GCO11896BTE(17A GC0118968TEX17A GCO11896BTE<17A GC011896STEX17A <br /> hod EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> hod EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst. J Woo J woo J Woo J Woo <br /> MS/MSD # 960145404 960145404 960145404 960145404 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 1/18/96 1/18/96 1/18/96 1/18/96 <br /> Analyzed Date- 1/18/96 1/18/96 1/18/96 1/18/96 <br /> Instrument I D #- GCHP17 GCHP17 GCHP17 GCHP17 <br /> COnc Spiked. 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> Result 11 11 11 31 <br /> MS % Recovery 110 110 110 103 <br /> • Dup Result 11 11 11 31 <br /> MSD% Recov 110 110 110 103 <br /> RPD 00 00 00 00 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS# BLK011896 BLK011896 BLK011896 BLK011896 <br /> Prepared Date 1/18/96 1/18/96 1/18/96 1/18/96 <br /> Analyzed Date 1/18/96 1/18/96 1/18/96 1/18/96 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> COnc Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Result 10 11 11 31 <br /> LCS % Recov. 100 110 110 103 <br /> LCS 71-133 72-128 72-130 71-120 <br /> Control Limits <br /> 7Piease Note <br /> e LCS is a control sample of known,interferent-free matrix that!s analyzed using the same reag]If <br /> Alllll,SEQUOIA ANALYTICAL ration,and analytical methods employed for the samples The matrix spike rs an aliquot of samd with known quantrtles of specific compounds and subjected to the entire analytical procedure <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> >; Brucie Fletcher interference,the LCS recovery is to be used to validate the batch <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative% Difference <br /> 9601974 PPP <1> i <br />