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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 FAX(415) 364-9233 <br /> ,�RESNA Client Prosect ID 150047 Q1, Ekholm Property s <br /> 1710 Main Street Matrix Sod <br /> kEscalon, CA 9532o <br /> ;Attention John Lane QC?� Sample Group. 3JA1301-9 Reported Oct 26, 1993 <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: A.Marald A-Maralit A.Maralit A.Maralit <br /> Conc.Spiked. 020 0 20 020 060 <br /> ' Units: mg/kg mg/kg mg/kg mg/kg <br /> LCS Batch#: BLK102093 BLK102093 BLK102093 BLK102093 <br /> ' Date Prepared: 10/20/93 10/20/93 10/20/93 10/20/93 <br /> Date Analyzed: 10/20/93 10/20/93 10/20/93 10/20/93 <br /> ,,Instrument I.D.O. GCHP-6 13CHP-6 GCHP-6 GCHP-6 <br /> LCS % <br /> Recovery: 85 100 105 102 <br /> ' Control Limits- 60-140 60-140 60-140 60-140 <br /> v ♦r rrn`{ ~'J ai'v bOrnnrmh�W,.+ h + o+o+µvw rn`:hcti•iaa�^ar+{rnc�x Jt h4. 3 <br /> .O �v+�+hH�r`YY i4Tr;'v�i.vS+°:i`,^r�ti+,f;ry.+v�.v�,r{�{,{.ArcaAw.,,`..h+ .w{innvh.+h+...{.x�,tt.�En,'4r J'„+'kvm` +rs•`�r`.,.,,,..+,w+,.r x+svl,.ro�>rcc{.J+y.�,y^r.rJMH,:e;Yr.'.�cy.w}.,xv vu,.t+r„<`a"��`tr..:. <br /> Y c.or R rc <br /> mWx+ w3nWrY ry �vF+nvJ +`+-4 rh+rr_vY b r v v rvSx++ %vim vwkvxY+firr <br /> ' MS/MSD <br /> Batch#: 3.189910 3.189910 3.189910 3.189910 <br /> ' Date Prepared: 10/20/93 10/20/93 10/20/93 10/20/93 <br /> Date Analyzed: 10/20/93 10/20/93 10/20/93 10/20/93 <br /> Instrument I.D.#: GCHP-6 GCHP-6 GCHP-6 GCHP-6 <br /> ' Matrix Spike <br /> % Recovery: 85 100 105 105 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 75 90 95 95 <br /> ' Relative% <br /> Difference: 13 11 10 10 <br /> SEQUOIA ANALYTICAL Please Mote <br /> The LCS is a control sample of known,interferent free matrix that is analyzed using the same reagents, <br /> 'l preparation and analytical methods employed for the samples The LCS%recovery data is used for <br /> ' �L validation of sample batch results flue to matrix effects,the OC limits for MS/MSQ's are advisory only <br /> and are not used to accept or reject batch results <br /> Vickie Tagu <br /> Project Manager 3JA1301 WAT 43> <br />