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cA 94063 (4i5} 364-9600 FAX(415) 364-9233 <br /> Sequoia 6go Chesapeake Drive Redwood Qty <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988-9600 FAX(510) <br /> (916)928- 0 00 <br /> Analytical 819 Sinker Avenue,Susie B Sacramento CA 95834 (916) 921-9600 <br /> a,.ryti <br /> i <br /> 0 <br /> Eugra West, Inc w}Client Project i0 "Shelf, 141'N E166- <br /> j Dorado, Stockton,CA <br /> 1050 Melody Lane, Ste 160 Matrix Water <br /> ° Roseville, CA 95678 Reported Sep 15, 1995' <br /> Attention Sudhakar Talankl DC Sample Group 509-0177 w <br /> ""` <br /> u C*r +{+ +rS, „ .- + �l ,. � r , , �, v , vh,'+�✓••£r:.t'M>`Y`.r v}v v}„n}'4w,:auir n.FMNd ./H.{v., wv <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyi- <br /> Benzene Toluene Benzene Xylenes <br /> Method. EPA 8020 EPA 8020 FPA 8020 EPA 8020 <br /> Analyst: C Lee C Lee C Lee C Lee <br /> Concentration <br /> Spiked' 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch#' LCS091595 LCS091595 LCS091595 LCS091595 <br /> Date Prepared' 9/15/95 g/ / <br /> 95 9/15/95 9/15/95 <br /> Date Analyzed: 9/15/95 9/15/95 9/15/95 9/15/95 <br /> Instrument I D # GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> i LCS % <br /> Recovery' 103 102 102 1a2 <br /> Control Limits: 75-125 75-125 75-125 75-125 <br /> ,� ,,,�r,��.w.•.�,r,�,w, , Mfr .� ., .� <br /> wrc rt w, <br /> MS/MSD <br /> Batch #- SS091595 BS091595 BS091595 BS091595 <br /> Date Prepared: 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 <br /> Instrument I.D #: GCHP-2 GCHP 2 GCHP-2 GCHP-2 <br /> Matrix Spike <br /> %Recovery- 83 82 93 91 <br /> Matrix Spike <br /> Duplicate <br /> 94 <br /> Recovery: 93 92 94 <br /> Relative% <br /> Difference: 11 11 1 1 32 <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 /> L valida#ton of sample batch resuits Oue to matrix effects,the CC limits for MS/MSG's are advisory only <br /> :PUndaSchneider `��1 and are not used to accept or reject Hatch results <br /> Project Manager 50901T7 FUG <6> <br />