Upgrade of an existing failed septic tank system at a school in the Waikato Region


Client : Newstead Model Country School in the Waikato Region of New Zealand.

Brief : To replace or upgrade the existing failed septic tank system and effluent application area.

Design requirement : 160 students and support staff – flow allowance 30L ea/day.

Treatment method : Re-use existing septic tanks if possible plus BIOROCK ECOROCK-5000.

Treated Effluent Application method : Pumped, Low Pressure Effluent Dosing (LPED) to trench.

Outcome : Low operational cost, high quality treated effluent , happy client.


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