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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek,CA 94598 (510) 988-9600 FAX(510) 988 9673 <br /> fall>1 Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Blaine Tech Services, Inc Client Project ID Shell Stockton /970131-Z1 <br /> 1680 Rogers Avenue Matrix Liquid <br /> San Jose, CA 95112 <br /> Attention Fran Thie Work Order# 9702115 01, 03-05, 07, 09 Reported Feb 13, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte. Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch#. GCO20697STEX02A GCO20697STEX02A GCO20697BT©(02A GCO20697BTEX02A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method- EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst G Fish G Fish G Fish G Fish <br /> MS/MSD # 9701/31204 9701D1204 9701D1204 9701D1204 <br /> Sample Conc : ND ND N D N D <br /> Prepared Date- 2/6/97 2/6/97 2/6/97 2/6/97 <br /> Analyzed Date 2/6/97 2/6/97 2/6/97 2/6/97 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10 ug/L 10 ug/L 10 pg/L 30 pg/L <br /> Result 96 97 9 9 31 <br /> MS % Recovery 96 97 99 103 <br /> Dup Result 9 5 96 98 31 <br /> AIiSâť‘ % Recov 95 96 98 103 <br /> RPD 10 10 10 00 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS #' BLK020697A BLK020697A BLK020697A BLK020697A <br /> Prepared Date 2/6/97 2/6/97 2/6/97 2/6/97 <br /> Analyzed Date 2/6/97 2/6/97 2/6/97 2/6/97 <br /> Instrument 1 D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked. 10 pg/L 10 pg/L 10 ug/L 30 frg/L <br /> LCS Result. 93 94 96 30 <br /> LCS %Recov 93 94 96 100 <br /> 60-140 60-140 60-140 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 /> egeriner ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> r 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 /> nager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9702115 BLA <1> <br />