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Iaboratory. A chain-of-custody form accompanied the samples. <br /> ' A.6. EQUIPMENT DECONTAMINATION <br /> ' Prior to sample collection, all sampling tools used for sample collection were thoroughly washed <br /> with a solution of Alconox and rinsed with clean water. All augers and drill rod were cleaned prior <br /> to advancement at each soil boring location. <br /> A.7. BORING ABANDONMENT <br /> ' All soil borings not converted to monitoring wells were permanently sealed to prevent vertical <br /> migration of potential contaminants through the boring. Soil borings were abandoned by backfilling <br /> ' with portland type I/II neat cement slurry from the total depth of the boring to surface grade. The <br /> cement grout was installed using the hollow-stem augers as tremmie pipe. <br /> 1 <br /> 1 <br /> • <br /> Advanced CeoEnvironmental,Inc. <br />