ABEL WOLDU

2007 Martin Luther King Jr Ave Se, Washington, Dc 20020
We will perform a total of one boring extended to feet below existing grades. The boring will be drilled utilizing 4. 25-inch hollow-stem, continuous-flight augers and will generate an approximately 6-inch annulus. Once the confining clay layer is encountered during sampling, 4-inch steel casing will be installed to a depth of at least feet within the clay layer. With the casing installed, the boring will be advanced to the proposed depth with mud-rotary equipment. Drilling tooling will be decontaminated using a steam cleaner or an alconox solution prior to commencing drilling operations for each boring. After geotechnical exploration is completed, the boring will be backfilled with bentonite slurry, 2lb bentonite powder to 1gal water. Borehole abandonment will be performed by tremie-grouting via a positive displacement pump for the bottom of the borehole.