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Sequoia * 680 Chesapeake Drive Redwood City,CA 90 (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 Sinker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX OW 921 0100 <br /> I*pgradient Client project ID Apache plastics <br />' 1017 26th St Matrix Water <br /> Sacramento, CA 95816 <br /> Attention Vic Cherven OC Sample Group 6052036-42 Reported Jun 5, 1996 <br /> QUALITY CONTROL DATA REPORT <br /> i <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> Method EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst V Owens V Owens V Owens V Owens <br /> Concentration <br /> Spiked 10 ug/L 10 ug/L 10 ug/L 30 ug/L <br />' LCS Batch# LCS053096 LCS053096 LCS053096 LCS053096 <br /> Date Prepared 05/30/96 05/30/96 05/30/96 05/30/96 <br />' Date Analyzed 05/30/96 05/30/96 05/30/96 05/30/96 <br /> Instrument I D # GCHP-7 GCHP-7 GCHP-7 GCHP 7 <br /> LCS <br /> Recovery 100 97 ss 100 <br /> Control Limits 75-125 75-125 75-125 75-125 <br />' MS/MSD <br /> Batch# 6052280 6052280 6052280 6052260 <br /> Date Prepared 05/30/96 05/30/96 05/30/96 05/30/96 <br />' Date Analyzed 05/30/96 05/30/96 05/30/96 05/30/96 <br /> Instrument I D # GCHP-7 GCHP-7 GCHP-7 GCHP-7 <br /> Matrix Spike <br />' % Recovery 80 90 93 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery * 90 100 93 <br /> Relative% <br /> Difference * 12 10 00 <br /> SE01.10IA 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 1s used for <br /> ,+f✓G Gf[V/ validation of sample batch results Due to matrix effects,the QC limits for MS/MSDs are advisory only <br /> Margie amba and are not used to accept or reject batch results *Matrix interference <br /> Project Manager/Sacramento Labors ory <br /> 6052036 UPS <5> <br />