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. TABLE 1 <br /> SAMPLING AND ANALYTICAL METHODS <br /> Borings Sample Depths Analytical Methods <br /> EPA Method 8020 TVPH Total EPA Method 8080 <br /> Lead <br /> 1 10 ' backfill X X X <br /> 23 ' X X X <br /> 2 10 ' backfill retain <br /> 23 ' X X X <br /> 3 10 ' backfill retain <br /> 23 ' X X X <br /> 4 15 ' X X <br /> 23 ' X X <br /> 5 15 ' X X <br /> 23 ' X X <br /> 6 15 ' X X <br />