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' Sequoia 680 Chesapeake f)nve Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> Analytical 819 Stnker Avenue,Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Kleinfelder Client project ICS 20-3941-01 E01 <br /> 2825 East Myrtle St Matrix Soil <br /> Stockton, CA 95205 <br /> Attention Tony Martin OC Sample Group 6060919-1001 Reported Jul 10, 1996 <br /> ' QUALITY CONTROL DATA REPORT <br /> ANALYTE <br />' I Diesel Diesel Diesel Diesel Lead Lead Lead <br /> Method EPA 8015M EPA 8015M EPA 8015M EPA 8015M EPA 6010 EPA 6010 EPA 6010 <br /> Analyst C Lee C Lee C Lee C Lee K Barta K Barta K Barta <br /> Concentration <br /> Spiked 7 5 mg/kg 7 5 mg/kg 7 5 mg/kg 7 5 mg/kg 50 mg/kg 50 mg/kg 50 mg/kg <br /> ILCS Batch# LCS070196 LCS070196A LCS070296 LCS070296A LCS070896A LCS062696 LCS062696A <br /> Date Prepared 07/01/96 07/01/96 07/02/96 07/02/96 07/08/96 06/26/96 06/26/96 <br /> Date Analyzed 07/01/96 07/01/96 07/05/96 07/03/96 07/09/96 06/27/96 07/02/96 <br /> Instrument I D # GCHP-3B GCHP-313 GCHP 3B GCHP-313 ICP 1 ICP-1 ICP-1 <br /> LCS 9/6 <br /> PRecovery 97 103 118 124 104 106 101 <br /> Control Limits 60 130 60 130 60-130 60-130 80-120 80-120 80.120 <br /> MS/MSD <br /> ' Batch # 6060934 6060962 6060997 6061355 6061101 6060947 6060969 <br /> Date Prepared 07/01/96 07/01/96 07/02/96 06/30/96 07/08/96 06/26/96 06/26/96 <br /> Date Analyzed 07/02/96 07/01/96 07/03/96 06/30/96 07/09/96 06/27/96 07/02/96 <br /> ' Instrument I D # GCHP-36 GCHP-3B GCHP-313 GCHP-36 ICP 1 ICP-1 1CP-1 <br /> Matrix Spike <br /> % Recovery 101 103 103 104 98 96 75 <br /> Matrix Spike <br /> Duplicate % <br /> ' Recovery 103 106 108 100 101 96 74 <br /> Relative % <br /> Difference 2 0 29 4 7 3 9 3 0 00 1 3 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> SEQUOIA 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 QC limits for MS/MSD s are advisory only <br /> and are not used to accept or reject batch results <br /> Linda C Sch eider <br /> Project Manager/Sacramento Laboratory <br /> 6060973 KLF <17> <br />