A single-stage trickling-filter plant is proposed for treating a dilute wastewater with a BOD concentration of 170 mg/L. The plant is located in a warm climate, and the minimum wastewater temperature anticipated is 20˚C. Using a recirculation ratio of 1, what is the maximum allowable BOD loading for a stone-media filter to achieve an average effluent BOD of 30 mg/L? Use the Eckenfelder formula with k_20°C = 0.1 m/d,m = 1.0, and n = 1.0. Also consider the specific surface area of the filtering medium to be 55 m²/m³.