You are required to disinfect an 18 inch diameter well with sodium hypochlorite. The well is 180 feet deep and static water level is 60 feet (there is 120 feet of water in the well). How many gallons of a 10% chlorine solution should be added to the well to produce an initial dose of 100 mg/L?


2.6 gal
0.6 gal
1.6 gal
3.6 gal