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Sequoia 680 Chesapeake Drive RCdWOOd City CA 94063 (4 15) 364 9600 FAX (415) 364 9233 <br /> Ana404 � 111,g,,Lanc Walnut Creck C-k 94593 (510) 988 9600 FAX(5l0) 988 9673 <br /> ytieal 819 Striker Avenue Suite a Sacramento CA 95834 (916) 921 9600 FAX(916) 921 0100 <br /> Delta Environmental Consuitants Client Project ID Unocal 45886 <br /> 3164 Gold Camp Or, Suite 200 Matrix Soil <br /> ancho Cordova, CA 95670 <br /> ' Attention Eric Holm CC Sample Group 507-1403 Reported Aug 10, 1995 <br /> ' QUALITY CONTROL DATA REPORT <br /> ' ANALYTE Chloro- - <br /> 11-Dlchloroethene 'trichloroethene benzene <br /> ' Method EPA 8010 EPA 8010 EPA 8010 <br /> Analyst K Pocan K Pocan K Pocan <br /> Concentration <br /> ' Spiked 10 ug/L 10 ug/L 10 ug/L <br /> LCS Batch#' LCS080895 LCS080895 LCS080895 <br /> ' Date Prepared 8/8/95 8/8/95 8/x/95 <br /> Date Analyzed. 8/8/95 8/8/95 8/8/95 <br /> Instrument 1 D # GCHP 5 GCHP 5 GCHP 5 <br /> ' LCS 1% <br /> Recovery 80 as 126 <br /> Control Limits 70-130 70-130 70-130 <br /> ' MS/MSD <br /> Batch # 5080151 5080151 5080151 <br /> ' Date Prepared 8/8/95 8/8/95 8/8/95 <br /> Date Analyzed 8/8/95 8/8/95 8/8/95 <br /> Instrument I D # GCHP-5 GCHP 5 GCHP-5 <br /> ' Matrix Spike <br /> % Recovery 75 82 61 <br /> ' Matrix Spike <br /> Duplicate % <br /> Recovery 65 76 60 <br /> ' Relative % <br /> Difference. 14 75 12 <br /> ' Please Note <br /> The LCS is a ccntroi sample of known interierent free matrix that is analyzed using the same reagents <br /> SEQUOIA ANALYTICAL preparation and analytical methods emotoyed for the samples The LCS o recovery data is usea for <br /> validation of sample batch results flue to matrix erfects ,he QC imlts for MSJ MSDs are aav sory only <br /> . , �✓ - and are not uses to acceot or reject bated results <br /> - <br /> Linda C Schneider <br /> i <br /> Project Manager <br /> 5071403 DLT -11> <br /> ' R� <br />