A stable and highly soluble pollutant is dumped into a lake at the rate of 0.16 metric tons per day. The lake volume is 4 x 107 m3 and the average water flow-through rate is 8 x 104 m3/day. Ignore evaporation from the lake surface and assume the pollutant is uniformly mixed in the lake. What eventual steady-state concentration (in ppm) will the pollutant reach?