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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364%W FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 92t 9600 FAX(916)921 0100 <br /> Canonle Environmental Client Project ID 94-331 Holt Brothers <br /> 1710 Maln Street- - Mat= Liquid <br /> Escalon, CA 95320 <br /> Attention John Lane Work Order# 9503M73-01-5 Reported Apr 17, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte: 1,1-Dichloro- Trichloro- Chloro- <br /> ethene ethene benzene <br /> QC Batch#. GCO4079SWI0009A GCD407958010009A GCO407958010009A <br /> Analy Method: EPA 8010 EPA 8010 EPA 8010 <br /> Pree Method: EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: H Porter H Porter H Porter <br /> MS/MSD#: 9503N6W7 9503N6807 9503N6807 <br /> Sample Conc : N D N D N D <br /> Prepared Date* 4/7/95 4/7/95 4/7/95 <br /> Analyzed Date- 4/7/95 4/7/95 4/7/95 <br /> Instrument 1 D.# GCHP9 GCHP9 GCHP9 <br /> Conc Spiked 25ug/L 25pg/L 25pg/L <br /> Result. 27 23 21 <br /> MS % Recovery: 108 92 84 <br /> Dup. Result: 28 24 23 <br /> MSD % Recov.: 112 96 92 <br /> RPD: 36 43 91 <br /> RPD Limit: 0-50 0-50 0-50 <br /> LCS# - - <br /> Prepared Date - - - <br /> Analyzed Date - - - <br /> Instrument I.D.#: - - - <br /> Conc. Spiked- - - - <br /> LCS Result. - - - <br /> LCS%Recov.: - - - <br /> LCS 28-167 35-146 38-150 <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 ANALYTICAL 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 wlthln specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague Clar `*MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference <br /> Project Manager 9503M73 CAN c4> <br />