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L sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364-9600 FAX(415)364-9233 <br /> 1900 Bates Avenue,Suite L Concord,CA 94520 (510) 686-9600 FAX(510)686 9689 <br /> Analytical 819 Striker Avenue,Suite a Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> ,� ryy.e}„r , ra <br /> 4 ` s+ u.. .,..�:.5+ <br /> Pacific Environmental Group Client Project Ib 310-040 02)2859, Stockton <br /> 2025 Gateway Place, Suite 440 Matrix Solid <br /> San Jose, CA 95110 <br /> �rAttentlon Maree Doden QC Sample Group 4693301-08 Reported Jul 27,W1994 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> Method. EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: E Cunanan E Cunanan E Cunanan E.Cunanan <br /> MS/MSD <br /> Batch#: 4GA9701 4GA9701 4GA9701 4GA9701 <br /> Date Prepared: 7/22/94 7/22/94 7/22/94 7/22/94 <br /> Date Analyzed: 7/22/94 7/22/94 7/22/94 7/22/94 <br /> Instrument 1.13#: GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Conc.Spiked: 0 20 mg/kg 0 20 mg/kg 0 20 mg/kg 0 60 mg/kg <br /> Matrix Spike <br /> %Recovery: 80 90 95 95 <br /> • Matrix Spike <br /> Duplicate% <br /> Recovery: 80 85 95 90 <br /> Relative% <br /> Difference: 00 57 00 54 <br /> vv }v4nnn rvii.r r` ..�. ]Y+rrv, r+ � �+fr,.5''„ a 6• .-'i4+ ~] ~ �.�+r ., r+ L ]}'+A aiY �,JrY,saY�e°>_+s rare, i.{ +., ...,,-, ,. ...x } o, ,q r+ v+ „ <br /> LCS Batch#* <br /> Date Prepared: <br /> Date Analyzed: <br /> Instrument LD #: <br /> LCS% <br /> Recovery: <br /> Recovery <br /> Control Limits: 55-145 47-149 47-155 56.140 <br /> t Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> i EQUOIA 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 /> Ir interference,the LCS recovery is to be used to validate the batch <br /> "Eileen A Manning <br /> Project Manager 4G93301 Ppp <3> <br />