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1 <br /> 0 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 /> Analytical 819 Striker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Pacific Environmental Group Client Project ID 310-097 1 B, Tracy <br /> 2025 Gateway Place, Suite 440 Matrix LIQUID <br /> San Jose, CA 95110 <br /> Attention Joe Muzzio Work Order# 9701516 01, 02 Reported Jan 20, 1997 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GCO1149713TEC01A GC011497BTEX01A GCO11497BTEX01A GCO11497BTEX01A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst: R Geckler R Geckler R Geckler R Geckler <br /> MS/MSD# 970138002 970138002 970138002 970138002 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 1/14/97 1/14/97 1/14/97 1/14/97 <br /> Analyzed Date 1/14/97 1/14/97 1/14/97 1/14/97 <br /> Instrument I D # GCHP1 GCHP1 GCHP1 GCHP1 <br /> Cone Spiked. 10ug/L 10ug/L 10ug/L 30ug/L <br /> Result 11 11 11 33 <br /> MS % Recovery 110 110 110 110 <br /> Dup Result. 10 10 10 31 <br /> MSD %Recov.: 100 100 100 103 <br /> RPD- 95 95 95 63 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS# BLK011497A BLK011497A BLK011497A ELK011497A <br /> Prepared Date 1/14/97 1/14/97 1/14/97 1/14/97 <br /> Analyzed Date. 1/14/97 1/14/97 1/14/97 1/14/97 <br /> Instrument I D.#- GCHP1 GCHP1 GCHP1 GCHP1 <br /> Cone.Spiked' 10ug/L 10ug/L 10pg/L 30ug/L <br /> LCS Result 10 10 10 31 <br /> LCS %Recov 100 100 100 103 <br /> 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,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 within specified control limits due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Tod Granicher <br /> Project Manager "'*MS=Matrix Spike,MSD=MS Duplicate,RPD=Relative%Difference 9701516 PPP e2> <br />