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The fluid streams that will be discharged to the Parachute Site evaporation pond are reverse osmosis (RO) reject, sand filter discharge, and boiler blowdown. RO reject is the portion of the plant feedwater that does not pass through the membrane of an RO filtering system. The boiler feedwater originates from the Parachute Site raw water system. Sand filter discharge is water that is backwashed from the sand filter that treats raw water entering the Parachute Site. The total volumetric flow rate will be approximately 25 gpm and the long-term TDS level is estimated to be between 70,000 and 100,000 ppm. Solids accumulation is not anticipated to occur at a level that will require removal. Specific details of the fluids that will be discharged to the Parachute Site evaporation pond are described in the following table. Parachute Site Evaporation Pond Parameter Va I u e Summer Winter Inlet Temperature °F n n Pond Temperature °F 60 35 Inlet pH 9 9 Inlet %TDS 6.2 6.2 Inlet % NazCO, 0.04 0.04 Inlet % NaCI 3.64 3.64 Inlet % Na„SO, 2.63 2.63 Inlet % NaHCO, 0.01 0.01 The MVR purge pond, located at the Parachute Site, will consist of fluid discharged from the final processing equipment and includes crystallized sodium carbonate solids. The volumetric flozo rate is expected to be 45 gpm and the long-term TDS level is estimated to be between 250,000 and 300,000 ppm. Solids accumulation will occur in this pond primarily in the form of sodium carbonate that crystallizes as temperature is dissipated. Solids will be periodically dredged and returned to the process system. No other disposal of solids is anticipated. Parachute Site MVR Purge Evaporation Pond Parameter Value Summer Winter Inlet Temperah~re °F 205 205 Pond Temperature °F 80 35 Inlet pH 11 11 Inlet %TDS 37 37 Inlet % NazCO, 30 30 15