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1 <br /> Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 960H0 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 /> io,'235 <br /> eocon Client Project In $8080-06-03 <br /> Sunrise Blvd , Suite 6 Matrix Water <br /> Rancho Cordova, CA 95742 <br /> Attention Rick Walls QC Sample Group 5061826-1831 Reported Jul 17, 1995 <br />' QUALITY CONTROL DATA REPORT <br />' ANALYTE 1,1-Dichloro- Tnchloro- Chloro- <br /> ' ethane ethene benzene <br /> Method EPA 601 EPA 601 EPA 601 <br /> Analyst- K Paean K Paean K Paean <br /> Concentration <br /> Spiked' lopg/L 10pg/L long/L <br />' LCS Batch#• LCS071395 LCS071395 LCS071395 <br /> I <br /> Date Prepared 7/13/95 7/13/95 7/13/95 <br /> Date Analyzed' 7/13/95 7/13/95 7/13/95 <br /> Instrument I D #: GC 5 GC 5 GC 5 <br /> LCS % <br /> Recovery 100 sa 66 <br /> Control Limits 70-130 70-130 70-130 <br /> } { t <br /> I MS/MSD <br /> Batch#' 5061830 5061830 5061830 <br /> Date Prepared' 7/13/95 7/13/95 7/13/95 <br /> Date Analyzed 7/13/95 7/13/95 7/13/95 <br /> Instrument I D # GC 5 GC 5 GC 5 <br /> Matrix Spike <br /> % Recovery, 70 77 62 <br /> Matrix Spike <br />' Duplicate% <br /> Recovery. 81 86 70 <br /> Relative% <br /> Difference 11 11 12 <br /> SEQUOIA ANALYTICAL Please ote <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 /> validation of sample batch results Due to matrix effects,the CC limits for MS/MSD's are advisory only <br /> fJ�-ane arlan and are not used to accept or reject batch results <br /> roje t Manager <br /> i <br />' 5061826 GEC <10> <br />