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Sequoia 680 Chesapeake Dnve Redwood City CA 94063 1415) 364 9600 FAX(415) 364 9233 - <br /> Analytical 404 N Wiget Lane Walnut Creex CA 94598 (510) 988 96W FAX(SIO)988 9673 <br /> VAO319 Stnker Avenue quote 8 Sacramento CA 95834 (9161 921 9600 FAX(916) 921 0100 <br /> Brown & Caldwefl Client Project 10 Arco 2133-95-5 Stockton <br /> 9616 Micron Ave Suite 600 Matrix Air / Water <br /> Sacramento CA 95827 <br /> Attention Mindy Patterson OC Sample Group 5081046-1048 Reported Sep 6, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Lead TRPH <br /> Method EPA 8020 EPA 8020 EPA 6020 EPA 8020 EPA 200 7 EPA 418 1 <br /> Analyst C Chapman C Chapman C Chapman C Chapman K Barta S Phillips <br /> Concentration <br /> Spiked 2 0 mglkg 2 0 mg/kg 2 0 mg/kg 5 0 mg/kg 0 50 mg/L 4 0 mg/L <br /> LCS Batch# LCS082495 LCS082495 LCS082495 LCS082495 LCS082495 LCS083095 <br /> Date Prepared 8/24/95 8/24/95 8/24/95 8/24/95 8/24/95 8/30/95 <br /> Date Analyzed: 8/24/95 8/24/95 8/24/95 8/24/95 8/30/95 8/31/95 <br /> Instrument I D #- GCHP 2 GCHP-2 GCHP-2 GCHP-2 P-40 IR-1 <br /> LCS <br /> Recovery 89 90 90 90 94 88 <br /> Control Limits 75-125 75-125 75-125 75-125 80-120 60.120 <br /> MS/MSD <br /> Batch #. BS082495 85082495 BS082495 SS082495 5081050 SS083095 <br /> Date Prepared: 8/24/95 8/24/95 8/24/95 8/24/95 8/24/95 8/30/95 <br /> Date Analyzed. 8/24/95 8/24/95 8/24/95 8/24/95 8/30/95 8/31/95 <br /> Instrument 1.13 #. GCHP-2 GCHP-2 GCHP-2 GCHP-2 P-40 IR-1 <br /> Matrix Spike <br /> % Recovery: 88 88 88 90 62 88 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 91 92 92 91 96 86 <br /> Relative % <br /> Difference. 3 4 44 44 1 1 43 23 <br /> SEQUOIA ANALYTICAL <br /> 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 /> Jan arlan validation of sample batch results Due to matrix effects,the QC limits for MSIMS D's are advisory only <br /> Prole t Manager and are not used to accept or reject batch results <br /> 5081048 BRS .45> <br />