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COLUMBIA ANALYTICAL SERVICES,INC <br /> QA/QC Report ` <br /> Client E%lCON Service Request: S950304 <br /> Project ARCO Faciim No 2133 I EMCON Project No 1775-709 01 Date Collected 318195 <br /> Sample Matrix ater Date Received 3/10195 <br /> Date Extracted: NA <br /> Date Analvzed: 3/I7/95 <br /> Matnx Spike/Duplicate Matnx Spike Summary <br /> TPH as Gasoline <br /> EPA Methods 5030/California DHS L=Method <br /> Units ug/L (ppb) <br /> Sample Name E-G 1 1 7) <br /> L Ib Codc S950,0.1-009 <br /> Percent Recovery <br /> CAS Relawe <br /> Spike Lc.el S impie Spike Result \cceptance Percent <br /> Analyte MS DMS Result MS DMS MS DMS Lircuts Difference <br /> Gasoline 25 000 25 000 47 100 73,100 73 400 104 105 67-121 <1 <br /> I <br /> Approved By Date ' <br /> 'J%ISI 57066194 <br /> Page 9 <br /> X911 RlnnWimga Avan11P • Cnn Ince fn[if nrnrn Or,4'1A Tnldni+nno tf1AfAZT ')A()(I • V-- 4nAfAn7-012;A <br />