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COLUMBIA ANALYTICAL SERVICES,INC. <br /> Analytical Report <br /> Client: EMCON Associates Service Request: K947479S <br /> Project: FoothilV#0939-004.08 Date Collected: NA <br /> Sample Matrix: Water Date Received: NA <br /> Date Extracted: 12/5/94 <br /> Chlorinated Herbicides <br /> EPA Method 8150A Modified <br /> Units: gg/L(ppb) <br /> Sample Name: Method Blank <br /> Lab Code: K947479-MB <br /> Date Analyzed: 12/7/94 <br /> Analyte MDL PQL <br /> Dalapon 0.54 5 ND <br /> MOPP 25.8 200 <65(a) <br /> Dicamba 0.013 0.5 ND <br /> MCPA 12.5 200 ND <br /> Dichloroprop 0.111 0.6 ND <br /> 2,4-D 0.122 1.0 ND <br /> 2,4,5-TP(Silvex) 0.010 0.2 ND <br /> 2,4,5-T 0.022 0.2 ND <br /> Dinoseb 0.030 2 <0.170(a) <br /> 2,4-DB 0.126 2 <0.154(a) <br /> a The MDL is elevated because of matrix interferences. <br /> 4Approved By: 1 Date: -2,4C7') <br /> 3S22PQUL11894 <br /> 7479SALS-3S22PQL(2)127/95 Page No.: <br /> (�° 000 <br />