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' Sequoia • 680 Chesapeake Drive Redwood City,CA 940 (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)921 0100 <br /> lopgradient Client Project ID Apache Plastics <br /> ' 1017 26th St Matrix Air <br /> Sacramento, CA 95816 <br /> Attention Vic Cherven OC Sample Group 605-2043 Reported Jun 5, 1996 <br /> 1 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 6020 EPA 8020 EPA 8020 EPA 8020 <br /> ' Analyst V Owens V Owens V Owens V Owens <br /> Concentration <br /> Spiked 2 0 mg/m3 2 0 mg/m3 2 0 mg/m3 6 0 mg/m3 <br /> ' LCS Batch# LCS052496 LCS052496 LCS052496 LCS052496 <br /> Date Prepared* 05/24/96 05/24/96 05/24/96 05/24/96 <br /> ' Date Analyzed 05/24/96 05/24/96 05/24/96 05/24/96 <br /> Instrument I D # GCHP-7 GCHP-7 GCHP-7 GCHP-7 <br /> LCS % <br /> Recovery- 92 92 92 92 <br /> Control Limits 75-125 75-125 75-125 75-125 <br /> MS/MSD <br /> ' Batch # BS05496 BS05496 BS05496 SS05496 <br /> Date Prepared 05/24/96 05/24/96 05/24/96 05/24/96 <br /> ' Date Analyzed 05/24/96 05/24/96 05/24/96 05/24/96 <br /> Instrument I D # GCHP-7 GCHP 7 GCHP-7 GCHP-7 <br /> Matrix Spike <br /> ' %Recovery: 92 92 92 92 <br /> Matrix Spike <br /> ' Duplicate% <br /> Recovery 96 98 98 98 <br /> Relative% <br /> ' Difference 42 63 63 63 <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 /> preparation and analytical methods employed for the samples The LCS%recoverydata is used for <br /> LG{i y U l`J validation of sample batch results Due to matrix effects,the OC limits for MS/MSD's are advisory only <br /> ' Margie Namba and are not used to accept or reject batch results <br /> Project Manager/Sacramento Laboratory <br /> 6052036 UPS <6> <br />