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Sequoia 680 Chesapeake Dnve 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 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Kleinfelder Client project ID 20-3941-01 E01 <br /> 2825 East Myrtle St Matrix Soil <br /> Stockton, CA 95205 <br /> Attention Tony Martin QC Sample Group 6060919-1001 Reported Jul 10, 1996 <br /> ' QUALITY CONTROL DATA REPORT <br /> ' ANALYTE Ethyl- <br /> Benzene Toluene Benzene X Penes <br /> Method EPA 6020 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# LCS070196 LCS070196 LCS070196 LCS070196 <br /> Date Prepared 07/01/96 07/01/96 07/01/96 07/01/96 <br /> Date Analyzed 07/01/96 07/01/96 07/01/96 07/01/96 <br /> Instrument I D # GCHP-1 GCHP 1 GCHP-1 GCHP-1 <br /> LCS <br /> Recovery 85 91 97 98 <br /> ' Control Limits 75-125 75-125 75-125 75-125 <br /> ' MS/MSD <br /> Batch # 6060915 5060915 6060915 6060915 <br /> Date Prepared 07/01/96 07/01/96 07/01/96 07/01/96 <br /> Date Analyzed 07/01/96 07/01/96 07/01/96 07/01/96 <br /> Instrument I D # GCHP-1 GCHP-1 GCHP-1 3CHP-1 <br /> 1 Matrix Spike <br /> % Recovery 74 81 85 85 <br /> ' Matrix Spike <br /> Duplicate % <br /> Recovery 76 82 88 89 <br /> Relative % <br /> Difference 27 12 35 4 6 <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 /> v validation of sample batch results Due to matrix effects,the QC limits for MS/MSG's are advisory only <br /> Linda C Schneider and are not used to accept or reject batch results <br /> Project Manager/Sacramento Laboratory <br /> 6060973 KLF <14> <br />