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Sequoia 680 Chesapeake Drive Redwood City,CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 1900 Bates Avenue, Swte L Concord,CA 94520 (510) 686 9600 FAX (510)686 9689 <br /> ,�► Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> Upgradient Environ Consultants Client Project ID Apache plastics <br /> 4111 82nd St Matrix Water <br /> Sacramento, CA 95826 <br /> Attention Vic Cherven QC Sample Goup 5020768-772 Reported Mar 1, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst C Chapman C Chapman C Chapman C Chapman <br /> Concentration <br /> Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> LCS Batch# LCS022795 LCS022795 LCS022795 LCS02-2795 <br /> Date Prepared 2/27/95 2/27/95 2/27/95 2/27/95 <br /> Date Analyzed 2/27/95 2/27/95 2/27/95 2/27/95 <br /> Instrument I D #- GCHP-1 GCHP-1 GCHP 1 GCHP 1 <br /> LCS % <br /> Recovery 100 100 100 100 <br /> Control Limits 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> Batch# 5020768 5020768 5020768 5020768 <br /> Date Prepared 2/27/95 2/27/95 2/27/95 2/27/95 <br /> Date Analyzed 2/27/95 2/27/95 2/27/95 2/27/95 <br /> Instrument I D # GCHP-1 GCHP-1 GCHP-1 GCHP-1 <br /> Matrix Spike <br /> % Recovery 89 90 89 90 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 94 94 94 95 <br /> Relative% <br /> Difference 55 43 55 54 <br /> SEQUOIA ANALYTICAL Please Note <br /> . n 1 I. The LCS Is a control sample of known,Interferent free matrix that is analyzed using the same reagents,(� {� preparation and analytical methods employed for the samples The LCS%recovery data Is used for <br /> '1 validation of sample batch results Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> Jennie Higgins and are not used to accept or reject batch results <br /> Project Manager <br /> 5020768 UUU <2: <br />