Problem $4$: Site preparation and grading require the placement of $20ft$ of new fill. An analysis of the resulting consolidation of the underlying soft, saturated, compressible deposit reveals a mean consolidation settlement of $22$ inch, affecting a $21\mathrm{.}5$ acre area $(1$ Acre $($:$=43,560f{t}^2\}.$ Prefabricated wick drains will be used to accelerate the settlement to meet the project schedule. Because of contamination from the former site use, the effluent from the wick drains will be collected and treated prior to disposal at an estimated cost of $$0\mathrm{.}25$ per gallon $(1cft=7\mathrm{.}48$gal. Assuming no loss of effluent during collection, the estimated treatment and disposal cost for wick drain effluent at this site is most nearly:

A$)$ $$430,000$

B$)$ $$3,200,000$

C$)$ $$5,200,000$

D$)$ $$35,000,000$