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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 /> V1,,V Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> ,Smith- Canonie Environmental Client Project ID 94432 Task 010, PG&E Tracy <br /> 1710 Main Street Matrix Liquid <br /> <Es-alon, CA 95320 <br /> Attention Jeanne Homsey Work Order# 9508962 -01-4 Reponed Aug 25, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch#- GCO817958TEX17A GCO81795BTEX17A GC081795BTEX17A GC081795BTEX17A <br /> Anally. Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep. Method: EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst. J Minkel J Minkel J Minkel J Minkel <br /> MS/MSD#. 950888203 950888203 950888203 950888203 <br /> Sample Cone.: N D N D N D N D <br /> Prepared Date 8/17/95 8/17/95 8/17/95 8/17/x5 <br /> Analyzed Date* 8/17/95 8/17/95 8/17/95 8/17/95 <br /> Instrument LD#. GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone.Spiked: 10 pg/L 10 ug/L 10 yg/L 30 Ng/L <br /> Result: 98 9 8 99 30 <br /> MS % Recovery, 98 98 99 100 <br /> Dup Result: 98 9 8 98 30 <br /> MSD %Recov.: 98 98 98 100 <br /> RPD. 00 00 10 00 <br /> RPD Limit 0.50 0-50 0-50 0.50 <br /> LCS# - <br /> Prepared Date - - - <br /> Analyzed Date, - - - <br /> Instrument 1 D.#' - - - <br /> Cone Spiked - - - <br /> LCS Result, - - <br /> LCS %Recov - - <br /> MS/MSD <br /> LCS 71-133 72-128 72-130 71-120 <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 li <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 /> Vickie Tague Clark <br /> Project Manager **MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9508962 CAN <1> <br />