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Sequoia 9680 Chesapeake Drive Redwood City CA 941a (415) 364 9600 FAX(415) 364 9233 <br /> 404 N Wiget Lane Walnut Creek CA 945 (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 /> pgradient Client Project lid Apache Plastics <br /> 1017 26th St Matrix Water <br />' Sacramento, CA 95816 <br /> Attention Vic Cherven OC Sample Group 5120888-93 Reported Jan 3, 1996 <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 B Williams B Williams B Williams B Williams <br />' Concentration <br /> Spiked 10pg/L 10pg/L 10Mg/L 30ug/L <br /> t LCS Batch# LCS122695 LCS122695 LCS122695 LCS122695 <br /> Date Prepared 12/26/95 12/26/95 12/26/95 12/26/95 <br /> Date Analyzed 12/26/95 12/26/95 12/26/95 12/26/95 <br /> Instrument I D # GCHP-2 GCHP-2 GCHP-2 GCHP-2 <br /> LCS % <br /> Recovery ss tot 102 100 <br /> Control Limits 75-125 75-125 75-125 75-125 <br /> ' <br /> MS/MSD <br /> Batch # 5120846 5120846 5120846 5120846 <br /> Date Prepared 12/26/95 12/26/95 12/26/95 12/26/95 <br /> Date Analyzed 12/26/95 12/25/95 12/26/95 12/26/95 <br /> tInstrument I D # GCHP-2 GCHP-2 PCHP-2 GCHP-2 <br /> Matrix Spike <br /> %Recovery 98 97 99 100 <br /> ' Matrix Spike <br /> Duplicate % <br /> tRecovery 95 98 99 97 <br /> Relative % <br /> Difference 31 to 00 31 <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 /> ? 17c, <br /> �� a�� preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> I validation of sample batch results Due to matrix effects,the CC limits for MS/MSD's are advisory only <br /> Janettlarlan and are not used to accept or reject batch results <br /> ' Project Manager <br /> 5120888 UPS <3> <br />