Project management of waste water from the production line at one designated as measure. The wastewater from 1) to 3) and 8) will be sent to the wastewater treatment system of wastewater treatment project, which is physical. And chemical compatibility In order to meet the treatment criteria Hemaraj Eastern Industrial Estate (Map ta phut) set before being sent to Wastewater Hold Up Tank and sent to Inspection Pit and then sent to the treatment plant. Central waste water of Hemaraj Eastern Industrial Estate (Map ta phut) (Piuture 2.5).