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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 (415) 364 9600 FAX(415) 364-9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988-%73 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> 4prown &Caldwell Client Project ID Arco 2133, Stockton <br /> 9616 Micron Ave Suite 600 Matrix Water <br /> Sacramento CA 95827 <br /> Attention Mindy Patterson OC Sample Group 506-0791 Reported Jun 27, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes TRPH Lead <br /> Method. EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 418 1 EPA 200 7 <br /> Analyst: C Lee C Lee C Lee C Lee V Owens K Barta <br /> Concentration <br /> Spiked: 10 ug/L 10 ug/L 10 ug/L 30 ug/L 4 0 mg/L 0 50 mg/L <br /> LCS Battu#: LCS061995 LCS061995 LCS061995 LCS061995 LCS062395 LCS062495 <br /> Date Prepared: 6/19/95 6/19/95 6/19/95 6/19/95 6/23/95 6/24/95 <br /> Date Analyzed: 6/19/95 6/19/95 6/19/95 6/19/95 6/26/95 6/27/95 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 IR-1 P-40 <br /> . LC5 % <br /> Recovery: 91 92 93 92 90 94 <br /> Control Limits: 75-125 75.125 75-125 75-125 80-120 80-120 <br /> Nro"`x 'n:'S'i�3°rn+r" "aF"^a+ee.r+'o.Nw,4.yrr,,.w.r+pv�+eyrFa;.} orq.J+'r�rKFfvYxr�'PX <br /> x,°rwr.a V Y M. r..6.r.�/k�'Yrr�C:w....G.7.:d Jw,,,n r.�r.rr n..v.:n./a,�rrsr.,•aw.w.w.:,�.,a,aysv+.act}hw.Swn�:+5>.`Suan,whwa+n.�.w.;:R:.�.ccw+Vrw.ai,.}w�' 111.11 <br /> r vG <br /> MS/MSD <br /> Batch#: 5060807 5060807 5060807 5060807 BS062395 5060$99 <br /> Date Prepared: 6/19/95 6/19/95 6/19/95 6/19/95 6/23/95 6/24/95 <br /> Date Analyzed: 6/18/95 6/19/95 6/19/95 6/19/95 6/26/95 6/27/95 <br /> Instrument I.D.#: GCHP-2 GCHP-2 GCHP--2 GCHP-2 IR-1 P-40 <br /> Matrix Spike <br /> %Recovery: 89 91 93 91 90 91 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 91 91 95 93 89 92 <br /> Relative% <br /> Difference: 2.2 00 2.1 22 1 1 1 0 <br /> SEQUOIA ANALYTICAL Please Note <br /> The LCS Is a control sample of known,interterent free matrix that is analyzed using the=me reagents, <br /> preparation and analytical methods employed for the samples The LCS%recovery data Is used for <br /> validation of sample batch results Due to matrix effects,the OC limits for MS/MSD'a are advisory only <br /> Janet dan and are not used to accept or reject batch results <br /> Project Manager <br /> 50601M.91118 <4> <br />