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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (650) 364 9600 FAX(650)364 9233 <br /> a <br /> 404 N Wtget Lane Walnut Creek,CA 94598 (510) 98$ 9600 FAX{SIO}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 911 007-1A/5417, Manteca <br /> 2025 Gateway Place, Suite 440 Matrix SOLID <br /> San Jose, CA 95110 <br /> Attention Joe Muzzio Work Order# 9801925 01, 02 Reported Jan 27, 1998 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes Gas <br /> Benzene <br /> QC Batch# GCO12098BTEXEXB GC012098BTEXEwXB GC012098BTEXEXB GC012098BTEXEXB GCO12098BTEXEXB <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst C DeMartini C DeMartini C DeMartini C DeMartini C DeMartini <br /> MS/MSD # 980176937 980176937 980176937 980176937 980176937 <br /> Sample Cone N D ND ND N D N D <br /> Prepared Date 1/20/98 1/20/98 1/20/98 1/20/98 1/20/98 <br /> Analyzed Date 1/21/98 1/21/98 1/21/98 1/21/98 1/21/98 <br /> Instrument I D # GCHP22 GCHP22 GCHP22 GCHP22 GCHP22 <br /> Cone Spiked 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg 1 2 mg/Kg <br /> Result 017 018 019 056 11 <br /> MS % Recovery 85 90 95 93 92 <br /> Dup Result 017 019 019 056 12 <br /> MSD % Recov 85 85 95 93 100 <br /> RPD 00 54 00 00 87 <br /> RPD Limit 0-25 0-25 0-25 0-25 0-25 <br /> LCS # BLK012098 BLK012098 BLK012098 BLK012098 BLK012098 <br /> Prepared Date 1/20/98 1/20/98 1/20/98 1/20/98 1/20/98 <br /> Analyzed Date 1/21/98 1/21/98 1/21/98 1/21/98 1/21/98 <br /> Instrument I D # GCHP22 GCHP22 GCHP22 GCHP22 GCHP22 <br /> Cone Spiked 0 20 mg/Kg 0 20 mg/Kg 0 20 mg/Kg 0 60 mg/Kg 1 2 mg/Kg <br /> LCS Result 018 019 020 058 13 <br /> LCS % Recov 90 95 100 97 108 <br /> 60-140 60-140 60-140 60-140 60-140 <br /> LCS 70-130 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 1s 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=IVIS Duplicate, RPD=Relative%Difference 9801925 PPP t 1> <br /> A <br />