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�ly Sequoia 680 C}tesapcakc Dn,e Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget Dane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> frrll� Analytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> r <br /> I Smith EnvIr f I ` '' ` <br /> orlmental Client Protect ID 20751, 94-273-94-10 <br /> 441 N Whisman, Bldg 23 Matrix Liquid s0- <br /> r Mountain View, CA 94043 'x <br /> Attention Rich Garlow Work Order# 9606338-04, 07, 09 <br /> Reported Jun 28, 1996 <br /> OUALITY CONTROL. DATA REPORT <br /> Analyte, Benzene Toluene Ethyl Xylenes <br /> Benzene <br /> � QC Batch# GC061396BTEX02A GG061396BTEX02A GC061396BTEX02A GC061396BTEX02A <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 <br /> MS/MSD#: 9605J1601 9605J1601 9W5J1601 J Woo <br /> Sample Conc N D N D 9605J1601 <br /> ND ND <br /> Prepared Date 6/13/96 6/13/96 6/13/96 6/13/96 <br /> Analyzed Date 6/13/96 6/13/96 6/13/96 6/13/96 <br /> Instrument I D #` GCHP2 GCHP2 GCHP2 <br /> Conc Spiked 10 GCHP2 <br /> p N9/� 10u9/L 10 u9/L 30 u9/L <br /> Result: 8 4 81 8 1 24 <br /> MS% Recovery. 84 81 81 80 <br /> D1up Result: 7 s <br /> 7s so 23 <br /> MSD % Recov 79 79 80 77 <br /> RPD 61 25 12 43 <br /> RPD Limit: 0-25 0-25 0-25 0-25 <br /> r r.,..n r i ,..,r ♦ I .rte, „Y- ,r r v� 5r r .t hr,r, +,r ' 5 �. h v A•� {r A4} AY ♦ {'Y V} 'v R r r r <br /> LCS#- BLK061396 BLK061396 BLK061396 BLKM396 <br /> Prepared Date. 6/13/96 6/13/96 6/13/96 6/13/96 <br /> Analyzed Date 6/13/96 6/13/96 6/13/96 6/13/96 <br /> Instrument I D # GCHP2 GCHP2 GCHP2 GCHP2 <br /> Conc Spiked- 10pg/L 10pg/L 10pg/L 30Y9/L <br /> LCS Result: 86 85 84 25 <br /> LCS % Recov, as 85 84 83 <br /> M M D 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 /> IDSEQOUNAL ICA 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 /> i interference,the LCS recovery is to be used to validate the batch <br /> Vyta n art <br /> prof t Manager '*MS=Matrix Spike,MSD=MS Duplicate, RPD=Relative%Difference 9606338 SSS c2> <br />