We have spoken with our Chief Wastewater Advisor regarding the proposed wastewater
storage tanks for 79 Taranaki Street.
The advice given is :
• that the tanks should be underground – and preferably constructed from fibre glass
• discharge should be controlled by an actuated valve for holding – normally open, close
based on level in public main
• the valve will be controlled by an ultrasonic and back up level switch – located within a
public wastewater manhole
• Proposed to use existing WW MH – WW35568 – highlighted below. This has a
calculated invert level of 5.62m MSL – and has an approximate depth of 1.5m. The
level and ability to connect by gravity will need to be confirmed.
• An overflow alarm will be required connected to the WWL system and a red flashing
light on the side of the building
• All maintenance, repairs and renewal will be the responsibility of the building
owners. Manuals, maintenance schedules etc. will need to be produced and made
available for the building owners.
• The tanks will need to be located so that access by a sump truck is achievable
• Can it be confirmed that the flow/discharge rates used have come from the Regional
Standard for Water Services
Notes for Richard:
I understand that previously it was advised to pursue obtaining connect for a connection through
the neighbouring church site to another section of wastewater network.
High level modelling had indicated that storage was unlikely to be required of the wastewater
was discharged to this part of the network.
Do you know if any work was done at looking at this option?
WRCG Form 396A (WI-015, 040, 060, 110 & 120)
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