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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 /> Analytical 819 Stnker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Pacific Envtronmental Group Client Project ID 320-159 1A/9-1452, Main St <br /> 2025 Gateway Place, Suite 440 Matrix SOLID <br /> San Jose, CA 95110 <br /> Attention R DeJung Work Order# 9601762 01-10 Reported Jan 26, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> OC Batch# GC011795BTEXEXA GCO11796BTEXEM GC011796BTEXEXA GC011796BTEXEXA <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#- 960131409 960131409 960131409 960131409 <br /> Sample Cone • N D N D N D N D <br /> Prepared Date 1/17/96 1/17/96 1/17/96 1/17/96 <br /> Analyzed Date 1/17/96 1/17/96 1/17/96 1/17/96 <br /> Instrument I D# GCHP1 GCHP1 GCHP1 GCHP1 <br /> Cone Spiked 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg <br /> Result 018 018 0 18 056 <br /> MS % Recovery 90 - 90 90 93 <br /> Dup Result 019 0 20 019 0 57 <br /> MSD % Recov 95 100 95 95 <br /> RPD 54 11 54 18 <br /> RPD Limit 0.50 0-50 0-50 0-50 <br /> I <br /> LCS# BLK011796 BLK011796 BLK011796 BLK011796 <br /> Prepared Date 1/17/96 1/17/96 1/17/95 1/17/96 <br /> Analyzed Date 1/17/96 1/17/96 1/17/96 1/17/96 <br /> Instrument I D # GCHP1 GCHPi GCHP1 GCHP1 <br /> Cone Spiked 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg <br /> LCS Result. 019 020 020 0 59 <br /> LCS %Recov 95 100 100 98 <br /> LCS <br /> Control Limits 55-145 47-149 47-155 56-140 <br /> Please Note <br /> The LCS Is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> 0 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 sub)ected 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 /> f�Brucie Fletcher <br /> Project Manager **MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9601762 PPP <1> <br />