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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 IFAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 I AX(510)988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Geocon blent Project ILS S8080-06-03 <br /> 3235 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 /> vat ir+ •tv t h L i hS4 Y'v <br />' QUALITY CONTROL DATA REPORT <br /> t ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel <br /> Method- EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015M <br /> Analyst' C Chapman C Chapman C Chapman C Chapman C Lee <br /> Concentration <br />' Spiked 10 pg/L 10 pg/L 10 pg/L 30 pg/L 300 p9/L <br /> LCS Batch#• LCS071295 LCS071295 LCS071295 LCS071295 LCS070595 <br />' Date Prepared 7/12/95 7/12/95 7/12/95 7/12/95 7/5/95 <br /> Date Analyzed* 7/12/95 7/12/95 7/12/95 7/12/95 7/5/95 <br /> Instrument I D # GCHP-1 GCHP-1 GCHP-1 GCHP-1 GCHP-3B <br /> b LCS % <br /> Recovery- 99 100 99 99 85 <br /> Control Limits 75-125 75-125 75-125 75-125 60-130 <br /> } t {$r♦ wv +• v l hvi it • l r �4v vhv ry k) e v .$ r v~�; fAk \ 2v i � v v } n � } i <br /> tMS/MSD <br /> Batch#. 5061776A 5061776A 5061776A 5061776A BLK070595A <br />' Date Prepared: 7/12/95 7/12/95 7/12/95 7/12/95 7/5/95 <br /> Date Analyzed: 7/12/95 7/12/95 7/12/95 1 7/12/95 7/5/95 <br /> Instrument LD #' GCHP-1 GCHP-1 GCHP-1 ; GCHP i GCHP-3B <br /> 3 <br /> Matrix Spike � <br /> % Recovery 93 93 95 96 85 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery. 95 94 96 96 97 <br />' Relative% <br /> Difference. 21 1 1 10 0 0 13 <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 /> 1 preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> Jvalidation of sample batch results Due to matrix effects,the 00 limits for MS/MSi7s are advisory only <br /> Janet flan and are not used to accept or re)ect batch results <br /> Project Manager " <br /> 5061826 GEC �9� <br />