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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 /> +l Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 %00 FAX(916)921 0100 <br /> Smith- Canonle Environmental Client Project ID 94-331-01, Holt Bros <br /> 1710 Main Street Matnx Liquid <br /> Escalon, CA 95320 <br /> Attention John Lane Work Order# 9506209-02, 3 Reported Jun 20, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GC060795BTEX17A GCO60795BTEX17A GG060795BTEX17A GC060795BTEX17A <br /> Analy Method- BPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst R Vincent R Vincent R Vincent R Vincent <br /> MS/MSD # 950603102 950/603102 950603102 950603102 <br /> Sample Conc N D N D N D N o <br /> Prepared Date 6/7/95 6/7/95 6/7/95 6/7/95 <br /> Analyzed Date 6/7/95 6/7/95 6/7/95 6/7/95 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked 10yg/L 10ug/L 10pg/L 30pg/L <br /> Result 77 81 82 24 <br /> MS % Recovery 77 81 82 80 <br /> Dup Result 81 85 85 25 <br /> MSD % Recov.. 81 85 85 83 <br /> RPD 51 48 36 41 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS # <br /> Prepared Date - <br /> Analyzed Date <br /> Instrument I D #.- <br /> Conc <br /> .Conc Spiked - - <br /> LCS Result <br /> LCS % Recov - - - <br /> MS/MSD <br /> LCS 71-133 72-128 72130 71-120 <br /> Control Limits <br /> Please Note <br /> The LCS is a control sample of known,interferent-tree matrix that is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike 1s 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 /> A ���lll�i� interference,the LCS recovery 1s to be used to validate the batch <br /> Vickie Tague Clark <br /> Project Manager **MS=Matrix Spike MSD=MS Duplicate, RPD=Relative%Difference 9506209 CAN <3> <br />