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SeQuoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> Sequoia <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(5r0)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Kleinfelder Client Project Ib 20-3941-01 E01 <br /> 2825 East Myrtle St Matrix Sod <br /> Stockton, CA 95205 <br /> Attention Tony Martin QC Sample Group 6060919-1001 Reported Jul 10, 1996 <br /> ' QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> PCB-1260 Cadmium Chromium Lead Nickel Silver <br /> Method EPA 8080 EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 6010 <br /> ' Analyst Chiaravalloti K Barta K Barta K Barta K Barta K Barta <br /> Concentration <br /> Spiked 112 5 ug/kg 50 mg/kg 50 mg/kg 50 mg/kg 50 mg/kg 50 mg/kg <br /> ' LCS Batch# LCS062896 LCS062896A LCS062896A LCS062896A LCS062896A LCS062896A <br /> Date Prepared 06/28/96 06/28/96 06/28/96 06/28/96 06/28/96 06/28/96 <br /> ' Date Analyzed 07/02/96 07/02/96 07/02/96 07/02/96 07/02/96 07/02/96 <br /> Instrument I D # GCHP-4B 1CP 1 1CP 1 ICP-1 ICP-1 ICP-1 <br /> LCS % <br /> Recovery 111 99 106 104 103 98 <br /> Control Limits 40-140 80-120 80-120 80-120 80-120 80-120 <br /> MS/MSD <br /> ' Batch # 6060944 6061025 6061025 6061025 6061025 6061025 <br /> Date Prepared 06/28/96 06/28/96 06/28/96 06/28/96 06/28/96 06/28/96 <br /> Date Analyzed 07/02/96 07/02/96 07/02/96 07/02/96 07/02/96 07/02/96 <br /> Instrument I D # GCHP-48 ICP-1 ICP-1 ICP-1 ICP-1 ICP-1 <br /> Matrix Spike <br /> ' % Recovery 100 69 58 66 60 68 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 103 74 62 68 149 72 <br /> Relative% <br /> ' Difference 30 69 66 29 85 5 7 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> EQUOIA ANALYTICAL 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 s are advisory only <br /> t,14C and are not used to accept or reject batch results <br /> Linda C Schneider ` <br /> Project Manager/Sacramento Laboratory <br /> ' 6060973 KLF <18> <br />