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' 1 Sequoia 680 Chesapeake Drive Redwood City CA 94060 (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 94598 1510? 988 9600 FAX(510) 988 9673 <br /> Analytical 819 Striker Avenue Suite 8 Sacramento CA 95834 (916) 929 9600 FAX(916)921 0100 <br /> 4upgradient Client Project lD Apache <br /> ' 3369 Kimberly Rd Matrix Air <br /> Cameron Park, CA 95682 <br /> Attention Clyde Hebbrom QC Sample Group 6010045-46 Reported Jan 9, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> 1 <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 2 0 mg/m3 2 0 mg/m3 2 0 mg/m3 6 0 mg/m3 <br /> ' LCS Batch# LCS010496 LCS010496 LCS010496 LCS010496 <br /> Date Prepared 01/04/96 01/04/96 01/04/96 01/04/96 <br /> ' Date Analyzed 01/04/96 01/04/96 01/04/96 01/04/96 <br /> Instrument I D # GCHP-2 GCHP-2 GCHP 2 GCHP-2 <br /> LCS % <br /> Recovery 94 94 96 93 <br /> Control Limits 75-125 75-125 75-125 75-125 <br /> ' MS/MSD <br /> Batch# BS010496 BS010496 BS010496 BS010496 <br /> Date Prepared 01/04/96 01/04/96 01/04/96 01/04/96 <br /> Date Analyzed 01/04/96 01/04/96 01/04/96 01/04/96 <br /> Instrument I D # GCHP-2 GCHP-2 GCHP 2 GCHP-2 <br /> ' Matrix Spike <br /> %Recovery 95 96 98 97 <br /> Matrix Spike <br /> ' Duplicate% <br /> Recovery 99 97 100 99 <br /> Relative% _ <br /> tDifference 41 10 20 20 <br /> EQUOIA ANALYTICAL Please [vote <br /> A The LCS 1s 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 Han and are not used to accept or reject batch results <br /> Prole anger/Sacramento Laboratory <br /> 6010045 UPG <2> <br />