The Challenge
The client required efficient treatment of onsite water storage tanks to meet discharge criteria in line with ANZECC Guidelines. The project faced logistical challenges, including restricted site access, the need for specialized equipment, and coordinating external testing hold points. Additionally, the operational weight of the water treatment plant (WTP) necessitated careful planning to ensure the carpark slab could bear the load, and chemical usage had to be minimized due to the low volume of water treated.

Challenge           

The site sedimentation dam was to be desludged to maintain its operational capacity.  During the planning phase, the pH and the turbidity were found to exceed the licence limits and required treatment prior to discharge. 

The client wished to move away from the traditional manual addition of chemicals & overnight settling approach, due to inconsistencies in treatment performance and WHS concerns with chemical handling.

Challenge    

The Challenge
Eire Constructions having used Shore Hire (Now United Rentals) over the course of the project, needed to perform pH Correction, super chlorination & De chlorination on their 805KL de-aeration, weir storage and pipeline systems at Grahamstown WTP prior to cut over to meet health and safety requirements, ensuring pathogen elimination while adhering to operational constraints, such as fixed cut in dates, day work only & precise dosing requirements.