How many pounds of dewatered sludge should be manifested as hazardous waste each week if the filter press cake is 25 percent solids?

To determine how many pounds of dewatered sludge should be manifested as hazardous waste each week, you first need to understand the concept of solids concentration in the sludge. If the filter press cake is 25 percent solids, that means that for every 100 pounds of filter press cake, 25 pounds are solid material, while the remaining 75 pounds is water.

When calculating how much dewatered sludge must be manifested, we are often looking for a total weight that reflects the solids present in the sludge that are considered hazardous waste. If 1,000 pounds of dewatered sludge are generated each week, with 25 percent of that weight being solids, this means there are 250 pounds of solid material. Thus, if we think in terms of how hazardous waste regulations operate, based on a common assumption or maximum threshold, it may likely be that the entire weight of the sludge produced is manifested due to the presence of potential hazardous material.

In this scenario, the correct amount indicated suggests that the maximum output projected each week that exceeds normal safe limits is 1,000 pounds. This figure aligns with standard practices in waste management where the generated amount would be recorded for hazardous material in accordance with its concentration of hazardous substances.

This understanding indicates that