An embankment construction requires the delivery of 38,200 m3 of the soil from a stockpile (d= 87 pcf, w=13%) to the construction site. the moisture content of the soil at the construction site is 9%. the compactors specifications indicate that the soil needs to be compacted to a minimum of 90% of modified proctor maximum dry unit weight. laboratory compaction tests yielded a maximum dry unit weight of 116 pcf. how much water (in cubic feet) must be added to the soil to increase its moisture content to the optimum moisture content of 14%