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j SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue e Suite LM • Concord, California 94520 <br /> (510) 686-9600 FAX (510) 686-9689 <br /> 4}.yf..Associates r r L 4 . prnv t .vw•{k vvJ 4{rt fs 'Y ..n r . n nv m rti i4^[ry}h?Sn r^ .. t. 1{n <br /> oux Client Project YD i4RCO #2093-08-I.-Tracy <br /> 1855 Gateway Blvd , Ste 770 <br /> Concord, CA 94520 <br /> Attention Paul S pple OC Sample Group #3070572-73 Reported Jul 30, 1993 <br /> 1 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> l2nitabdity Corrosive H <br /> Method EPA 1010 EPA 9045 <br />' Analyst s P M N <br /> Reporting Units "c pH Units <br /> Date Analyzed Jul 26, 1993 Jul 27, 1993 <br />' OC Sample # xylene,Flashpoint 307-0572 <br /> 29'C <br /> Sample Conc.: 26 88 <br /> Spike Conc. <br /> kvAdded- N/A N/A <br /> Conc. Matrix <br />' Spike: N/A N/A <br />' Matrix Spike <br /> % Recovery. N/A N/A <br />' Conc. Matrix <br /> Spike Dup - 25 88 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery N/A N/A <br />' Relative <br /> %Difference 39 00 <br /> EQUOIA AN YTICAL %Recovery Tonc o -Cone of Sample x 100 <br /> Spike Cone Added <br /> Relative%Difference Conc of M S -Cone of M 5 D x 100 <br /> SCenneth K F Lee (Cone of M S + Coneo M D 2 <br /> Laboratory Director <br />' #F3070572 ROU <5> <br />