* To control pollution of surface water:
Wastewater is treated by wastewater treatment tanks, then link into the system ditches, manholes cleft wire mesh trash can ensure drainage water flow, water collection ensuring the sediment type and dirt out of the water. Ensuring that sewage does not contaminate soil and leak into the lake regulation.
Wastewater from the field when rain water is collected into the system roof ditches, manholes and lead the combined sewer system of parks area.
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