Laserfiche WebLink
( \ Sequoia 680 Chesapeake Dnve Redwood Cav CA 94063 4151 364 9600 FAX(415) 364 9233 <br /> 1Z <br /> 1 104 N V/,,,,Lane Walnut Creek CA 94598 (510) 938 9600 FAX(510)988 9673 <br /> Analytical 319 Striker Avenue 3wite 8 Sacramento CA 95834 ?916) 921 9600 FAX (916)921 oioo <br /> Brown & Caldwell Client Project ID Arco 2133-95-5 Stockton <br /> 9616 Micron Ave , Suite 600 Matrix Air/Water <br /> Sacramento CA 95827 <br /> Attention Mindy Patterson QC Sample Group 5081046-1048 Reported Sep 6 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: C Lee C lee C Lee C Lee <br /> Concentration <br /> Spliced 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch# LCS082895 LCS082895 LCS082895 LCS082895 <br /> Date Prepared 8/28/95 8/28/95 8/28/95 8/28/95 <br /> Date Analyzed- 8/28/95 8/28/95 8/28/95 8/28/95 <br /> Instrument LD # GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> LCS % <br /> Recovery- 87 as sa 91 <br /> Control Limits- 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> Batch # 5081025 5081025 5081025 5081025 <br /> Date Prepared- 8/28/95 8/28/95 8/28/95 8/28/95 <br /> Date Analyzed: 8/28/95 8/28/95 8/28/95 8/28/95 <br /> Instrument J.D.#: GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> Matrix Spike <br /> % Recovery: 87 89 88 88 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 87 89 89 89 <br /> Relative% <br /> Difference. 00 00 1 1 1 1 <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 MS/MSD's are advisory only <br /> Janet H an and are not used to accept or reject batch results <br /> Project nager <br /> 5081046 BRS <6> <br />