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Sequoia 9680 Chesapeake Drive Redwood Gty,CA 9406(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) 92t 0100 <br /> ' Upgradient Client Project ID Apache plastic <br /> 3369 Kimberly Rd Matrix Water <br /> Cameron Park, CA 95682 <br /> Attention Vic Cherven OC Sample Group 6020920-21 Reported Mar 6, 1996 <br /> 1 <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 CC/BW CC/BW CC/BW CC/BW <br /> Concentration <br /> Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br /> ' LCS Batch# LCS030296 LCS030296 LCS030296 LCS03046 <br /> tDate Prepared 03/02/96 03/02/96 03/02/96 03/02/96 <br /> Date Analyzed 03/02/96 03/02/96 03/02/x6 03/02/96 <br /> Instrument I D# GCHP-2 GCHP-2 GCHP-2 GCHP 2 <br /> LCS °,6 <br /> Recovery 88 89 100 100 <br /> ' Control Limits 75-125 75-125 75-125 75-125 <br /> ' MS/MSD <br /> Batch# 6020998 6020998 6020998 6020998 <br /> Date Prepared 03/02/96 03/02/96 03/02/96 03/02/96 <br /> Date Analyzed 03/02/96 03/02/96 03/02/96 03/02/96 <br /> Instrument I D # GCHP 2 GCHP-2 GCHP-2 GCHP-2 <br /> ' Matrix Spike <br /> % Recovery 85 88 89 88 <br /> Matrix Spike <br /> ' Duplicate% <br /> Recovery 74 76 100 97 <br /> Relative% - <br /> ' Difference 14 15 12 98 <br /> EQUOIA 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 /> validation of sample batch results Due to matrix effects,the QC limits for MS/MSD's are advisory only <br /> Janet n and are not used to accept or reject batch results <br /> Project anager/Sacramento Lab ora ory <br />' 6020920 UPG <4> <br />