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„ Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wtget Lane Walnut Crock CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 319 Sinker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> ,mar,-w: <br /> Delta Environmental Cons@SlitsCilent Project 10 `Llnoca"Sa86, Stockton, CA <br /> 3764 Gold Camp Or, Suite 200 Matrix Soli <br /> Rancho Cordova, CA 95670 w <br /> {Attention Enc Holm QC Sample Group 609-0217 Reported <br /> c., <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel Lead <br /> Method- EPA 8020 EPA 8020 EPA 8020 EPA 8024 EPA 8020 EPA 8020 <br /> Analyst- C Lee C Lee C Lee C Lee C Lee K 8arta <br /> Concentration <br /> Spiked: 0 20 mg/kg 0 20 mg/kg 0.20 mg/kg 0 60 mg/kg 7 5 mg/kg 50 mg/kg <br /> LCS Batch#- LC8090995 LCSOS0996 LCS090996 LCS090996 LCS091096 LCS090696 <br /> Date Prepared: 09/09/96 09/09/96 09/09/96 09/09/96 09/10/96 09/06/96 <br /> Date Analyzed 09/09/96 09/49/96 09/09/96 09/09/96 09/10/96 09/06/96 <br /> Instrument I D #• GCHP-1 GCHP-1 GCHP-1 GCHP-1 GCHP 3A ICP-1 <br /> LCS % <br /> Recovery 104 104 105 105 101 103 <br /> Control Limits: 70-130 70-130 70-130 70-130 60-140 80-120 <br /> ,- <br /> t <br /> MS/MSD <br /> Batch#' 6090217 6490217 6090217 6490217 6094308 6090054 <br /> Date Prepared: 09/o9/96 09/09/96 09/09/96 09/09/96 09/10/96 09/06/96 <br /> Date Analyzed: 09/09/96 09/09/96 09/09/96 0.9/49/96 09/10/96 09/06/96 <br /> Instrument 1.0 #' GCHP-1 GCHP-1 GCHP-1 GCHP-1 GCHP-3A ICP-1 <br /> w <br /> Matrix Spike <br /> % Recovery- 100 141 100 103 77 <br /> Matnx Spike <br /> Duplicate % <br /> Recovery, 96 100 95 99 43 <br /> Relative % <br /> Difference: 41 10 51 do 56 <br /> SEQUOIA ANALYTIC L Please Note <br /> The LCS is a control samole oT known interterem free matrix that ss analyzed using the same reagents <br /> /7 � / preaaration and analytical methods emotoveo for the samoles The LCS o recovery data Fs used mr <br /> C validanon or sample patch results Due to matrix erfects the CC limits far MSi M Ds are advtsary dory <br /> Linda C Schheider and are not used to acceot or refect batcn results Matrix Interference <br /> Project Manager/Sacramento Laboratory <br /> 6090217 CLQ <5> <br />