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+ rr 1 <br /> ,680 Chesapeake Drive Redwood City.V4063 (650)364-9600 FAX(650)364-9233 <br /> T Sequoia 404 N.Wiget Lane Walnut Creek,CA 94598 (925)988-9600 FAX(925)988-9673 <br /> 819 Striker Avenue,Sulte 8 Sacramento,CA 95834 (916)9Z1-9600 FAX(916)921-0 100 <br /> 455 McDowell Blvd.North,Ste.D Petaluma,CA 94954 (707)792-1865 FAX(707)792-0342 <br /> Analytical 11551 Industrial Road San Carlos,CA 94070-4111 (650)232-9600 FAX(650)232-9612 <br /> :.�......- :-.�.....:.:rr- :.�:...................::::.moi:>;::-.:.�::..: :,::r:::..:....:.......... :.... <br /> Innac a len roiect 86, ockt6h...C.A..............'."......... <br /> 3939 Cambridge Rd., Ste. 220 Matrix: Soil <br /> Cameron Park, CA 95682 <br /> Attention: Mark Capps QC Sample Group: S906308 Reported: Jun 18 1999 <br /> »::r?.::............. <br /> r.- <br /> QUALITY CONTROL DATA REPORT <br /> ANA YTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8920 EPA 8020 <br /> Analyst: J.Minkel J.Minkel J.Minkel J.Minkel <br /> Concentration <br /> Spiked: 0.80 mg/kg 0.80 mg/kg 0.80 mg/kg 2.4 mg/kg <br /> LCS Batch#: 5LCS061899 5LCS061899 5LCS061899 5LCS061899 <br /> Date Prepared: 06/18/99 06/18/99 06/18/99 06/18/99 <br /> Date Analyzed: 06/18/99 06118199 . 06/18/99 06/18/99 <br /> Instrument I.D.#: HP-5 HP-5 HP-5 HP-5 <br /> LCS % <br /> Recovery: 90 89 89 92 <br /> Control Limits: 50-150% 50-150% 50-150% 50-150% <br /> i <br /> .. ......r..........,....... ......:. <br /> ........:::. ....v...:.........,::::::::.iii:-:isa?_>.:-ss?::.::-:";:V::•::}iG4}:v:::rc:?:�,':......:-i?v:ir:.i':is}ii:i-??:v'?:ii: ....,..:....:......n.n.......... ................n..n ... <br /> MS/MSD <br /> Batch#: 9061340 9061340 9061340 9061340 <br /> Date Prepared: 06/18/99 06/18/99 06/18/99 06/18/99 <br /> Date Analyzed: 06/18/99 06/18/99 06/18/99 06/18/99 <br /> Instrument I.D-#: HP-5 HP-5 HP-5 HP-5 <br /> Matrix Spike <br /> % Recovery: 103 104 105 108 . <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 96 96 99 100 <br /> Relative% <br /> Difference: 6.3 6.2 6.1 8.0 <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 /> validation of sample batch results. Due to matrix effects,the QC limits for MSIMSD's are advisory only <br /> Ronald W. Bobel and are not used to accept or reject batch results. <br /> Project Manager/Sacramento Labordfory <br /> S906308.PCP <2> <br />