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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415)364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(5 10)986 9673 <br /> *ir Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Pacific Environmental Group Client Project ID 310-040 5A /2859, Stockton <br /> 2025 Gateway Place, Suite 440 <br /> San Jose, CA 95110 <br /> Attention Andrew Lehane Work Order# 9603783 01, 02 Reported Mar 18, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> Analyte Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> QC Batch# GCO31496BTEX17A GC031496BTEX17A GC031496BTEX17A GC031496BTEX17A <br /> Analy Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Prep Method EPA 5030 EPA 5030 EPA 5030 EPA 5030 <br /> Analyst J Woo J Woo J Woo J Woo <br /> MS/MSD # 960313903 960313903 960313903 960313903 <br /> Sample Cone N D N D N D N D <br /> Prepared Date 3/14/96 3/14/96 3/14/96 3/14/96 <br /> Analyzed Date 3/14/96 3/14/96 3/14/96 3/14/96 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Cone Spiked 10ug/L 10ug/L 10ug/L 30ug/L <br /> Result 10 10 10 30 <br /> •MS % Recovery 100 100 100 100 <br /> Dup Result 96 94 93 27 <br /> MSD % Recov 96 94 93 90 <br /> RPD 41 62 73 11 <br /> RPD Limit 0-50 0-50 0-50 0-50 <br /> LCS # BLK031496 BLK031496 BLK031496 BLK031496 <br /> Prepared Date 3/14/96 3/14/96 3/14/96 3/14/96 <br /> Analyzed Date 3/14/96 3/14/96 3/14/96 3/14/96 <br /> Instrument I D # GCHP17 GCHP17 GCHP17 GCHP17 <br /> Conc Spiked 10ug/L 10ug/L 10u9/L 30ug/L <br /> LCS Result 10 10 10 30 <br /> LCS % Recov 100 100 100 100 <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 /> � QUOIA ANALYTICA!_ preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> C p 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 /> Claudia Hlrotsu interference,the LCS recovery is to be used to validate the batch <br /> Project Manager "NIS=Matrix Spike, MSD=MS Duplicate,RPD=Relative%Difference 9503783 PPp <1> <br /> q0 <br />