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0 0 <br /> 4. Engineer shall collect samples in metal sampling containers from the ba khoe bucket of <br /> contaminated soil observed at the frequency of one sample per twenty 1' ear feet of trenching. <br /> The samples will be sealed and labeled with the location,trench depth,1 me,date and samplers <br /> name. A chain of custody will be completed for the samples collected. The samples shall be <br /> stored on ice pending delivery to the laboratory. The Engineer shall del ver the samples to the <br /> Stockton FGL Laboratory office for BTEX and TPH-gas analysis. A S n Joaquin County <br /> Purchase Order will also be submitted to the laboratory to authorize the malytical work. <br />