In the early 1970's Lake Ontario had a total phosphorus loading of approximately 15,000 mta (metric tons per annum) and an in-lake concentration of 21 micrograms/Liter. The only losses of total phosphorus for the lake are settling and fluching throught the lake's outlet. Assume the outflow rate is 212 km^2/year and the sediment area is 10,500 km^2. Assume the water inflow to the lake is the same as the outflow. Find the apparent settling velocity for the phosphorus in the lake.