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Sequoia 680 ChesapcaYc Drrvc Redwood CA 94(163 (415) 36, 9600 FAX 1,15) ;e4 9233 <br /> ® 404 N V j&et Lane walnut Creel CA 9459E 1510) 988 9600 iAX 1510 969 9673 <br /> Analytical 819 Strikar A�cnue Suite 8 Sacramento C4 95844 (916) 921 9600 FAX (91 o) 921 0106 <br /> Pacific Environmental Group Client Project ID 310-097 1 B /0123, Tracy <br /> 2025 Gateway Place, Surte 440 Matrix LIQUID <br /> San Jose, CA 95110 l~ <br /> Attention Joe Muzzio Work Order# 9612616 01-04 Reported Dec 20, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC121396BTEX07A GC121396BTE.X07A GC121396BTEX07A GC121395BTEX07A <br /> Analy Method EPA 6020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst A. Porter A Porter A Porter A.Porter <br /> MS/MSD # 961234501 961234501 961234501 961234501 <br /> Sample Conc N D N D N D N D <br /> Prepared Date 12/13/96 12/13/96 12/13/96 12/13/96 <br /> Analyzed Date 12/13/96 12/13/96 12/13/96 12/13/96 <br /> Instrument i D # GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc Spiked long/L 10pg/L 10pg/L 30pg/L <br /> Result 11 11 11 33 <br /> MS % Recovery 110 110 110 110 <br /> Dup Result 11 11 12 35 <br /> MSD % Recov .. 110 110 120 117 <br /> RPD 00 00 87 59 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS# BLK121396 BLK121396 BLK121396 BLK121396 <br /> Prepared Date 12/13/96 12/13/96 12/13/95 12/13/96 <br /> Analyzed Date 12/13/96 12/13/96 12/13/96 12/13/96 <br /> Instrument I D # GCHP7 GCHP7 GCHP7 GCHP7 <br /> Conc Spiked 10pg/L 10Ng/L 10Ng/L 30ug/L <br /> LCS Result 12 12 12 35 <br /> LCS % Recov. 120 120 120 117 <br /> 60-140 60-140 60-740 60-140 <br /> LCS 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 subfected 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 /> Tod Granlcher <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9612616 PPP <1 i <br />