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680 Chesapeake Drive Redwood City CA 94063 (650) 364-9600 FAX(650) 364-9233 <br /> Sequoia 404 N Wiget lane Walnut Creek CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue Suite 8 Sacramento CA 95834 (916)921-9600 _ FAX(916)921-0100 <br /> Analytical 1455 McDowell Blvd North Ste D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 } <br /> Inc Client Project']D Shel!3725'Tracy Blvd <br /> Blaine Tech Services, <br /> 1680 Rogers Ave Matrix Liquid <br /> San.lose, CA 95112 <br /> Attention Fran Thie Work Order# 9808903-01-05 Reported Sep 2, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GC0827988TEX02A GC0827986TEX02A GCO82798BTEX02A - G0082798BTEX02A -GCO82798BTEX02A <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 D Newcomb D Newcomb ❑ Newcomb ❑ Newcomb D Newcomb <br /> MS/MSD # 8081340 8081340 8081340 8081340 8081340 <br /> Sample Conc N D N D N D N D N D <br /> Prepared Date 8/27/98 8/27/98 8/27/98 8/27/98 8/27/98 <br /> Analyzed Date 8/27/98 8/27/98 8/27/98 8/27/98 8/27/98 <br /> Instrument LD # GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc. Spiked 20ug/L 20 ug/L 20,ug/L 60 Ng/L 330 erg/L <br /> Result 21 21 21 64 340 <br /> MS % Recovery 105 105 105 107 103 <br /> Dup Result 21 21 21 63 330 <br /> MSD % Recov 105 105 105 105 100 <br /> RPD 00 00 00 1s 30 <br /> —RPD Limit —0=25 " _0-25 --0-25 0-25 0-25 <br /> -LCS # BLK082798 BLK082798 BLK082798-- -Y----—BLK082798 - - - - -BLK082798 <br /> Prepared Date 8/27/98 8/27/98 8/27/98 8/27/98 8/27/98 <br /> Analyzed Date 8/27/98 8/27/98 8/27/98 8/27/98 8/27/98 <br /> Instrument 1.D # GCHP2 GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 20{tg/L 20Ng/L 20frg/L 60pg/L 330Ng/L <br /> LCS Result 21 20 21 63 330 <br /> LCS % Recov 105 100 105 105 100 <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 /> SUptYTICAL, #1271 preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> ified with known quantities of specific compounds and subjected to the entire analytical procedure I <br /> the recovery of analytes from the matrix spike does not fall within specified control limits due to matrix <br /> 4interference,the LCS recovery is to be used to validate the batch <br /> Per <br /> Pager **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative% Difference 9808903 BLA <2> <br />