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L <br /> wSequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX(415)364 9233 <br /> � <br /> a 1900 Bates Avenue,Suite L Concord,CA 94520 (510} 686 9600 FAX(510)686-9689 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)92t 0100 <br /> i <br /> �u�a;.r�i..,.ryrti n Jr a�} +y`yr ..` v J ivA r..x{vAvrw y rv},.var n �[�v naa.:fa�: .}wwv .v x yry}rr n � • ny{rr Y, 1y�6r�v�`vr{.q�hvr.};y{N a wf <br /> �03"a& 6Environmentil Group ,A Client <br /> 'r6jectID310--040 02/`0 <br /> 'nocar <br /> ry <br /> 0.2025 Gateway Place, Suite 440 Matrix Liquid <br /> J�San Jose,CA 95110 <br /> Attention Maree Doden QC Sample Group 9408074 _01-03 Reported Aug 8, 1994' <br /> }}.kvll{'``�x�c,�',-}k� N,.,}{�vs; e> ,w v. �t bra�-:^'Y�`ao-Y^V��ri`�,�3"`a}::�•^r><ee- � g, a - r a a5a{ r. s ii}�.: $diar�,w�, o���v}r r.y.� <,. {s� <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 R Vincent R.Vincent R Vincent R Vincent <br /> MS/MSD <br /> Batch# 8407132306 M7G2308 9407G2308 940762308 <br /> Date Prepared N A. N A. N A. N A <br /> Date Analyzed 8/2/94 8/2/94 8/2/94 8/2/94 <br /> Instrument I D# GCHP-3 GCHP-3 GCHP-3 GCHP-3 <br /> Conc Spiked 10ug/L 10pg/L 101tg/L 301tg/L <br /> Matrix Spike <br /> . % Recovery 100 100 100 100 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 106 106 106 107 <br /> Relative% <br /> Difference. 58 58 68 68 <br /> r A} v ti}a ti* {ry a ., y ry r n} sr e o }, t ! :y.n ^o ;^.91-1 10 <br /> Cv'.,S-nY., •" v ,,, .. ,. ,,,,.r,.- n}a++'.fr,.< 'a'..a,. ,,.n ., ..� <br /> LCS Batch# <br /> Date Prepared, <br /> Date Analyzed <br /> Instrument i.D# <br /> LCS% <br /> Recovery <br /> %Recovery <br /> Control Limits 71-133 72-128 72-130 71-120 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> OIA 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 /> interference,the LCS recovery is to be used to validate the batch <br /> Eileen A Manning <br /> Project Manager 9408074 PPP <1> <br />