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Sequa 630 Chesapeakc Drive Redwood J _ 94063 (415) 364.9600 Rky(415) 364-9233 <br /> 404 N. Wiget Lane Walnut Creek, CA 94593 (510) 938.9600 FAX(510) 998-9673 <br /> Analytical B19 Striker Avenuc,Suite 8 Sacramento, CA 95834 (916) 921-9600 FAX(916)921.0:00 <br /> . ...... <br /> Brown aldwell Cii'e'...ht Project ID:- Arco 5450, Stockton ..... <br /> 9616 Micron Ave., Suite 600 Matrix: Soil <br /> ::..,Sacramento, CA 95827 <br /> Attention. Steve Misner OC Sample Group 5100252-265 Reported: Oct 19, 1995:L.., <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> it <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 3020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: V.Owens V.Owens V.Owens V.Owens <br /> Concentration <br /> Spiked: 0.20 mg/kg 0.20 mg/kg 0.20 mg/kg 0.60 mg/kg <br /> LCS Batch#: LCS101295 LCS101295 LCS101295 LCS101295 <br /> Date Prepared: 10/12/95 .0/12/95 10/12/95 10/12/95 <br /> Date Analyzed: 10/12/95 .110/12/95 10/12/95 10/12/95 <br /> Instrument I.D.#: GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> LCS % <br /> Recovery: 103 104 105 103 <br /> Control Limits: 15-125 75-125 75-125 75-125 <br /> iL <br /> ......... <br /> ........ <br /> ........... <br /> . .......... <br /> ...Ix <br /> MS/MSD <br /> Batch #: 5100252 5100252 5100252 5100252 <br /> Date Prepared: 10/12/95 10/12/95 10/12/95 10/12/95 <br /> Date Analyzed:, 10/12/95 10/12/95 10/12/95 10/12/95 <br /> Instrument I.D.#: GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Matrix Spike <br /> %Recovery: 92 95 96 97 <br /> Matrix Spike <br /> Duplicate % <br /> Recovery: 102 103 104 104 <br /> ti <br /> Relative% <br /> Difference: 10 8.1 4.0 7.0 <br /> is <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 /> N 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/MSG's are advisory only <br /> Jarn�et H an ..and are not used to accept or reject batch results. <br /> ol c <br /> Prroject anagger <br /> 5100252.BRS <6> <br />