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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 - FAX(415) 364-9233 <br /> ,r4,v.�rr.m`e+c S�•r's` ''` C};Cn,c AS'm` :ax <br /> Zx <br /> 4RESNA� Ghent Project 1D 150047 01, EKHOLM Property A <br /> 1710 Main Street Matrix Water 4 <br /> Escalon, CA 95320 <br /> <Attention John Lane QC Same Group 3J_B2901-4 Reported Nov 4, 19M <br /> QUALITY CONTROL DATA REPORT <br /> ' ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel <br /> ' Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015 <br /> Analyst: A.Miraftab A.Mrraftab A-Muaftab A MErattab C Lee <br /> Conc. Spiked: 10 10 10 30 300 <br /> Units: ug/L Ng/L fig/L ug/L ug/L <br /> LCS Batch#: BLK102993 BLK102993 BLK102993 BLK102993 BLK102293 <br /> ' Date Prepared. - - - - 10/22/93 <br /> Date Analyzed: 10/29/93 10/29/93 10/29/93 10/29/93 10/22/93 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 GCHP-5 <br /> IP LCS% <br /> Recovery: 99 98 99 100 83 <br /> Control Limits: 80-120 80.120 80-120 80-120 50-1504 M <br /> ?+G ;, ,�� .wf+:}n'+i14 ^�J x{sht}'{�^ :o,:`' ` 4}�`s . 0 4 .ha xy` -v,Hyk+rvw.�.Y]i}+t'4vr•p+e+eavkcnro JJ,Y f+r r :en <br /> ivv v{4+,h}v..x,vJtituv m�ruxn.u'�,i n+rvxnvm KWW k+ }C%+-}+'t-�v++�sv+tit A��a£4 rir r nwJ�x,1hx4 + +-++rw}+xtiv 3+v Y,x v v r,v r4 + `tr++�xmvxm,.4wY rx'r t vrcn�r.`.Sw#a.wx,c',o-e.xhS�acv!sY;+'a' <br /> ' MS/MSD <br /> Batch#: 3JE0001 3JE0001 3JE0001 3JE0001 3J95303 <br /> ' Date Prepared: - - - - 10/22/93 <br /> Date Analyzed: 10/29/93 10/29/93 10/29/93 10/29/93 10/22/93 <br /> Instrument I.D.#: GCHP-2 GCHP 2 GCHP-2 GCHP-2 GCHP-5 <br /> ' Matrix Spike <br /> %Recovery: 94 94 93 93 80 <br /> t Matrix Spike <br /> Duplicate% <br /> Recovery: 97 96 97 97 83 <br /> ' Relative% <br /> Difference: 31 21 4 2 42 37 <br /> SEQUOIA ANALYTICAL Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> Ora�V� validat on of sample batch results Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> ' and are not used to accept or reject batch results <br /> Vickie Tague <br /> Project Manager 3JB2901 WAT <3> <br /> 1 <br />