Four wells were drilled and cored in the 100 series for use in evaluating the fracturing which had been accomplished in Wells No. 101-106 and for possible use in subsequent extraction trials. Extensive logging, liquid permeability, air permeability and well communication tests were carried out for fracture assessment at both the hydraulic/explosive fracture site and the explosive underream site. Although these evaluations are still incomplete, and no decision can yet be made as to which site would be preferred for an extraction trial, both sites have much greater permeability and better interwell communications than was present in the first extraction trials on the existing Dow site. Preparations for the planned extraction trial are continuing; it is expected that all systems will be complete and in readiness for an extraction trial to begin in August.