Sludge Treatment and Storage:
It is the responsibility of the Supplier to treat all the sludge generated to reduce its volume and weight through appropriate thickening, digestion, conditioning and drying (refer pgs. 16-17 of Sludge Reference Document for more details).
Sludge should be stored in an adequate storage area having at least 50% higher capacity than the average annual sludge generation quantity. The storage area should be designed to withstand the load of material stored and must be well ventilated. The flooring of the sludge storage area should be impermeable and inert in nature. The sludge storage area should be enclosed or covered and protected from weather (precipitation or wind). Secondary containment should be provided for the sludge storage area through the use of berms and curbing to contain the sludge inside the storage area. Dry sludge should be managed so that dried sludge is not blown from the area to the surrounding environment.