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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> wv 404 N Wigct Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> (1—� 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX (916)921 0100 <br /> Analytical <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 /> QC Batch# GCO11397STE(01A GCO11397BTEX01A GCO11397STEX01A GC0113976TEX01A <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 #• 970138001 970138001 970138001 970138001 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 1/13/97 1/13/97 1/13/97 1/13/97 <br /> Analyzed Date 1/13/97 1/13/97 1/13/97 1/13/97 <br /> Instrument LD #• GCHP1 GCHP1 GCHP1 GCHP1 <br /> Cone Spiked 10ug/L 10ug/L 10pg/L 30ug/L <br /> Result 98 97 98 30 <br /> MS % Recovery. 98 97 98 100 <br /> Dup Result 93 93 93 29 <br /> MSD %Recov 93 93 93 97 <br /> RPD' 52 42 52 34 <br /> RPD Limit 0-25 0-25 0-25 0-25 <br /> LCS # BLK011397A BLK011397A BLK011397A BLK011397A <br /> Prepared Date 1/13/97 1/13/97 1/13/97 1/13/97 <br /> Analyzed Date 1/13/97 1/13/97 1/13/97 1/13/97 <br /> Instrument I D # GCHP1 GCHP1 GCHP1 GCHP1 <br /> Cone Spiked' 10Ng/L loyg/L 10yg/1- 30Ng/L <br /> LCS Result* 92 92 92 28 <br /> LCS % Recov 92 92 92 93 <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 H <br /> the recovery of analytes from the matrix spike does not tall within specified control limits due to matrix <br /> Interference,the LCS recovery is to be used to validate the batch <br /> Tod Granicher <br /> Protect Manager "*MS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9701516 PPP <1 n <br />