working satisfactory. Effluent sumps were checked twice daily by the piggery
staff. Gernhoefer contracting had just finished desludging the first pond and spray
irrigated effluent to the flatter paddocks above the ponds. The desludged pond was
displaying massive microbial actively (boil ups) at the time of inspection due to the
volume of digested sludge removed. Only a slight discharge was occurring from the
final aerobic pond and the Tawhiti Stream level was high due to recent rain
throughout
falls
and flowpaths. This may include a permeability standard as
given in Condition 9 (TRC Officer’s report) for ponds.
d. Description and modelling of future wastewater quality to
demonstrate how nutrient and contaminant limits for
irrigation areas can be achieved. No characterisation of
future wastewater quality has been provided.
e. Characterisation of stormwater flows at and above design
rainfall event (RNZ propose a 10 year annual recurrence
interval rainfall event (Condition
during the second
and third inspections. Water samples were taken in conjunction with the second inspection on 10 Jan 2022.
The Urenui Beach Camp trenches were inspected separately on 16 Feb 2022 at 0900 NZST. There had been
heavy rain prior and the camp reported they had experienced a power cut for 30+ hours, during which
NPDC had attended with generators to ensure the wastewater pumps did not overflow. There were no
odour or visual issues identified in or around the trenches at the time of
minimal flaring occurring and the flare was clean burning
with no smoke or odours noted.
4 December 2020
An inspection carried out following period of heavy rain and strong winds. A lot of tree debris was noted
around the site and the stormwater drains were being cleared at the time of inspection. Frogs were noted
within the interceptor system. In general the site was tidy and no staining was noted. Gas was being flared
at a rate and quantity which controlled smoke and odour.
4 March
Freshwater Management 2014 (NPS-FW), by
far the greatest number of attribute measurements at each site already fall into the ‘A’ NOF
category, with most of the remainder falling into a ‘B’ category. There is a single ‘C’ result and
no ‘D’ result: that is, there is no attribute at any site that falls below the compulsory bottom
lines established within the NOF.
Before the NOF was released, the Council had in preparation for the review of its RFWP
commissioned NIWA to develop regionally
which water levels rise and fall rapidly in
response to rainfall. The unit has both shallow unconfined low-yielding aquifers and
confined higher yielding aquifers at depth. The unit includes New Plymouth and other
urban areas and most of the land use (outside the Egmont National Park) is
predominately intensive pastoral farming. The use of surface water supports a wide
range of consumptive activities including agriculture, industry, community water
supplies, and hydro-electric power
outfall. Stormwater from the tankage area is pumped over into the process sewers which flow to the
storm pond. The stormwater falling on the non-process areas of the western half of the site (Figure 1) is
directed by “v” ditches running alongside the roads to a dam/pond and then out to the Tasman Sea via the
Manu Stream. Stormwater falling on the eastern side of the site is directed to unnamed tributaries of the
Waihi Stream via outfalls and a small sedimentation pond.
The sludge lagoons
that works needed to be undertaken to ensure best
practice is maintained. This included ensuring that chemicals are covered with tarpaulins, especially when
rain is expected, and ensuring that chemicals are stored in a bund if access to another storage area is not
immediately available. Also discussed was the bund itself and the requirement that it must capture and
contain stormwater to ensure that spilled chemicals cannot escape the bund and flow to the ring drain,
skimmer pit and ultimately
Taranaki’s lakes are likely to fall below the “national bottom line”, meaning
they are considered to be degraded and in poor health. Overall, 78% of lakes were
predicted to fail to achieve the bottom line for at least one attribute, with more than 50%
of lakes likely to fail the lake-bottom dissolved oxygen attribute. A predicted 72% failed
chlorophyll-a (a measurement of algae), while 54% failed for total phosphorus and 61%
for total nitrogen.
7. There are a number of further steps required to