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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9(,00 FAX (415) 364 9233 <br /> 404 N W get Lane Walnut Creek CA 94598 (510) 988 9600 FAX (510)988 9673 <br /> Analytical 619 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Smith Environmental' Ak .V v y Client Project IDM 20920,94-273-94-10 <br /> ' 441 N Whlsman, Bldg 23 Matrix Liquid <br /> Mountain View, CA 94043 <br /> Attention Rich Garlow Work Order# 9609978 -01-04 Reported Oct 1, 1996 <br /> n yn x J+ i i ~r} + + .-n,v + } r N • i Y} ,.r r <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#. GC0925%BTEX18A GC092596BTEX18A GC092595BTEX1aA GC0925968TEX18A <br /> Analy. Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> ' Prep. Method. EPA 5030 EPA 50.30 EPA 5030 EPA 5030 <br /> Analyst: R Geckler R Geckler R Geckler R Geckler <br /> ' MS/MSD#. 96o9779o4 960977904 960977904 960977904 <br /> Sample Cone . N D N D N D N D <br /> Prepared Date: 9/25/96 9/25/96 9/25/96 9/25/96 <br /> Analyzed Date: 9/25/96 9/25/95 9/25/96 9/25/96 <br /> Instrument I D #, GCHP18 GCHP18 GCHP18 GCHP18 <br /> Conic. Spiked. loug/L 10j1g/L 10ug/L 30Erg/L <br /> Result: as so 72 24 <br /> �MS % Recovery. 88 80 72 80 <br /> Dup Result 87 78 72 24 <br /> ' MSD% Recon+ : 87 78 72 80 <br /> RPD- 1 1 2 5 Do 00 <br /> ' RPD Limiter v. 425 1 W 425 0-25 un ,, 0-25 <br /> ' LCS#: BLK092596 BLK092596 BLK092596 BLK092596 <br /> Prepared Date: 9/25/96 9/25/96 9/25196 9/25/96 <br /> Analyzed Date- 9/25/96 9/25/96 9/25/96 9/25/96 <br /> Instrument 1.D#• GCHPIS GCHP18 GCHP18 GCHP18 <br /> Cone Spiked: 10ug/L 10ug/L 10ug/L 30ug/L <br /> LCS Result: 95 86 77 25 <br /> ' LCS %Recov.- 95 86 77 63 <br /> ' MS/MSD 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,interferent4ree matrix that is analyzed using the same reagents <br /> SEQUOIA ANALYTICA 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 /> ' V S nk IS <br /> Pro ect Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9609978 SSS <1> <br />