A sandy loam site with a density of 1430 kg/m3, total porosity of 0.45 and water-filled porosity of 0.32 receives a massive spill of naphthalene (C1oHs) in the amount of 13,500 kg. The spill causes contamination of soil at the concentration of 3800 g/g soil (dry basis). Estimate the following:

a) Air flow rate needed to promote bioventing, assuming that the O2 respiration rate is 22% O2/d. b) Amount of ammonium sulfate [(NH4)2 SO4] needed, if the required C:N ratio is 10:1. c) Required number of wells if the depth of contamination is 4.6 metres and the radius of influence of a single well is 3.2 metres