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Sequoia <br /> Chesapeake Drive Redwood City CA 94063 (650)364-9600 FAX(650) 364-92.33 <br /> W 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 /> AnalIwo ytical <br /> ���� ���� 1455 McDowell Blvd North Ste D Petaluma CA 94954 (707) 792-1865 FAX(707) 792-0342 <br /> 1551 Industrial Road San Carlos CA 94070-4111 (650)232-9600 FAX(650) 232-9612 <br /> *Sequoia Analytical Client Project ID L905529- Blaine Tech Services, Inc <br /> 1551 Industrial Blvd Matrix Liquid <br /> San Carlos, CA 94070 <br /> Attention Mike Gregory OC Sample Croup 9052409-412 Reported Jun 16, 1999 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC060399 GCO60399 GCO60399 GC060399 <br /> 802002A 802002A 802002A 802002A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst D Newcomb ❑ Newcomb D Newcomb D Newcomb <br /> MS/MSD # <br /> Sample Conc - - <br /> Prepared Date - <br /> Analyzed Date - _ <br /> Instrument I D # - - <br /> Cone Spiked - <br /> Result <br /> MS % Recovery - <br /> Dup Result <br /> MSD % Recov0 - _ _ <br /> RPD - - <br /> RPD Limit <br /> LCS # 2LCS060399 2LCS060399 2LCS060399 2LCS060399 <br /> Prepared Date 6/3/99 6/3/99 6/3/99 6/3/99 <br /> Analyzed Date: 6/3/99 6/3/99 6/3/99 6/3/99 <br /> Instrument I D # HP-2 HP-2 HP-2 HP-2 <br /> Cone Spiked 20jug/L 201tg/L 20yg/L 60ug/L <br /> LCS Result 20 18 19 61 <br /> LCS % Recov 100 90 95 102 <br /> LCSD Result 21 19 20 62 <br /> LCSD % Recov 105 95 100 103 <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 A CAL, #1271 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 tall within specified control limits due to matrix <br /> Interference,the LCS recovery is to be used to validate the batch <br /> Charlie Westwater **MS=Matrix Spike, MSD=MS Duplicate, RPD=Relative %Difference <br /> Project Manager <br /> 9052409 SSS <11> <br />