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' Sequoia 680 Chesapeake Dnve Redwood Gty CA 94063 (415) 364-9600 FAX(415) 364 9233 <br /> Analytical 404 N W'get Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> war Anal <br /> 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921-9600 FAX (916)921 0100 <br /> `...� r.. , r r A?rs°n<''+tW ..ra+r�,...,,.....,. ,a tr ,., x"May" K'r- o-i v"�+o^`G}....•.i v:e:r .,,. ' ri`, `J; , <br /> �ugro)N est, Inc ` `'$r Clienf Project I� Shefl,141"N` El borao(3, Stockton, CA <br /> 1050 Melody lane, Ste 160 Matnx Water <br /> Roseville, CA 95678 <br /> Attention Sudhakar Talankl QC Sample Group 509-0177 W Repotted n Sep 15, 1995 <br /> .a�.,. <br /> aw.a�'0..x„'GaSaa,.,vw:a. <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE: 1,1-Dichlora- Chloro- <br /> ethene Trichloroethene Benzene Toluene benzene <br /> Method- EPA 624 EPA 624 EPA 624 EPA 624 EPA 624 <br /> Analyst: W Amundsen W Amundsen W Amundsen W Amundsen W Amundsen <br /> Concentration <br /> Spiked: 50 ug/L 50 ug/L 50 ug/L 50 ug/L 50 ug/L <br /> LCS Batch#' LCS091595 LCS091695 LC5091595 LCS091595 LCSM1595 <br /> Date Prepared: 9/15/95 9/15/95 9/15/95 9/15/95 9/15/95 <br /> Date Analyzed: 9/15/95 9/15/95 9/15/95 9/15/95 9/15/95 <br /> Instrument I D.# MS-F1 MS-F1 MS-F1 MS-F1 MS-F1 <br /> LCS % <br /> Recovery- 77 96 96 98 102 <br /> Control limits: 59-172 62137 66-142 59-199 61133 <br /> afn,cr•hwn a^xw r .r,� k r v+w.M.x:,..v. ., , ,.,-rrr ati lv,,,, 4 4. ,, r t yr <br /> 4 <br /> ` r\ rt ~Yri ~ O tiYrn r r nFrw x vv^hJFn ^C lnvswt r ..,w . ,vn + rn, er. v r.+ <br /> MS/MSD <br /> Batch#- 5090381 5090.381 5090381 5090381 5090381 <br /> Date Prepared: 9/15/95 9/15/95 9/15/95 9/15/95 9/15/95 <br /> Date Analyzed: 9/15/95 9/15/95 9/15/95 9/15/95 9/15/95 <br /> Instrument I.O.#' MS-F1 MS-F1 MS-F1 MS-F1 MS-F1 <br /> Matrix Spike <br /> % Recovery- 73 108 100 90 98 <br /> Matnx Splice <br /> Duplicate% <br /> Recovery: 69 88 86 88 95 <br /> Relative % <br /> Difference: 65 21 14 23 30 <br /> Please Nate <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SE12UOIA ANALYTI AL preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> validat<on of sample batch results Due to matrix effects,the 4C limits for MS/MSD's are advisory only <br /> CA,,_)I and are not used to accept or reject batch results <br /> Linda Schneider <br /> Project Manager <br /> 5090177 FUG <7> <br />