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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 /> Analytical 819 Stnker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Blaine Tech Services, Inc 'Client Project ID Shell Stockton /980112-H2 <br /> 1680 Rogers Ave Matrix Liquid <br /> 'San Jose, CA 95112 <br /> ,,Attention Fran Thie Work Order# 9801695-10, 12 Reported Jan 30, 1998 <br /> i{ r r 4 r1+ 1 rrx r } r .. z v ryr4 r r r ~ • r r s <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xytenes Gas <br /> Benzene <br /> QC Batch#: GC012798BTEX22A GCO12798BTEX22-A GCO12798BTEX22A GCO12798BTEX22A GC012798BTEX22A <br /> Analy 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: J Minkel J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD # 980184402 980184402 980184402 980184402 980184402 <br /> Sample Conc : N D N D N D N D N D <br /> Prepared Date: 1/27/98 1/27/98 1/27/98 1/27/98 1/27/98 <br /> Analyzed Date 1/27/98 1/27/98 1/27/98 1/27/98 1/27/98 <br /> Instrument LD #. GCHP22 GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc Spiked: 10ug/L 10lig/L 10pg/L 30jtg/L 60yg/L <br /> Result 10 99 99 29 67 <br /> MS% Recovery. 100 99 99 97 112 <br /> . Dup Result, 10 10 10 30 68 <br /> MSD % Recov 100 100 100 100 113 <br /> RPD. 00 10 10 34 15 <br /> RPD Limit- 0-25 0-25 0-25 0-25 0-25 <br /> LCS # BLK012798 BLK012798 BLK012798 BLK012798 BLK012798 <br /> Prepared Date 1/27/98 1/27/98 1/27/98 1/27/98 1/27/98 <br /> Analyzed Date: 1/27/98 1/27/98 1/27/98 1/27/98 1/27/98 <br /> Instrument I.D # GCHP22 GCHP22 GCHP22 GCHP22 GCHP22 <br /> Conc Spilled 10 jig/L 10 pg/L 10 jig/L 30 pg/L 60pg/L <br /> LCS Result- 10 10 10 29 67 <br /> LCS % Recov. 100 100 100 97 112 <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 /> A ALYTICAL 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 /> Peggy n r <br /> roje t ager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9801694 BLA <7> <br />