Surface water: rainwater runoff to natural surface drainage system common in Xi'an CCN unnecessary build separate stormwater system.
* Waste water drainage and waste treatment:
- Wastewater is treated through septic tanks before being discharged into the environment. The production (if any) will be collected and processed by the system processor prescribed standards before being discharged into the environment. Household waste and solid waste collection company environment to handle.
Drainage
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