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Sequoia 580 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX (415) 364 9233 <br /> 404 N Wiget lane Walnut Creek G1 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 /> IM-West Client Project 10 653 30 /Santa Fe/Stockton - <br /> 455 Capitol Mail, ath Fir Matra Water <br /> Sacramento, CA 95814 <br /> Attention Laurie Depies QC Sample Group 5051738-1741 deported Jul 14, 1995 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes Diesel <br /> Method. EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA S015M <br /> Analyst. C Lee C Lee C Lee C Lee C Lee <br /> Concentration <br /> Spiked' 10 mg/L 10 mg/L 10 mg/L 30 mg/L 300 ug/L <br /> LCS Batch#. LCS071195 LCS071195 LCS071195 LCS071195 LCS070395A <br /> Date Prepared. 7/11/95 7/11/95 7/11/95 7/11/95 7/3/95 <br /> Date Analyzed 7/11/95 7/11/95 7/11/95 7/11/95 7/3/95 <br /> Instrument i D # GCHP-1 GCHP-1 GCHP-1 GCHP-1 GCHP-3B <br /> LCS <br /> 10 Recovery 101 100 101 101 91 <br /> Control Limits 75-125 75-125 75-125 75-125 60.130 <br /> MS/MSD <br /> Batch # 5061705 5061705 5061705 5051705 BS070395A <br /> Date Prepared 7/11/95 7/11/95 7/11/95 7/11/95 7/3/95 <br /> Date Analyzed 7/11/95 7/11/95 7/11/95 7/11/95 7/3/95 <br /> Instrument I D # GCHP 1 GCHP-1 GCHP-1 GCHP-1 GCHP-3B <br /> Matrix Spike <br /> % Recovery 98 99 99 99 91 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery 98 98 99 98 77 <br /> Relative % <br /> Difference 00 10 00 10 17 <br /> SEQUOIA ANALYTICAL Please Note <br /> The LCS is a control sample of known interferent free matnx that is analyzed using the same reagents <br /> �jo preparation and analytical methods employed for the samples The LCS 96 recovery data is used for <br /> validation of sample batch results Due to matnx effects the OC limits for MS/MSD's are advisory only <br /> Linda C Schneider and are not used to accept or reject batch results <br /> Project Manager <br /> 5061738 ERS <3> <br />