previous monitoring carried out between 2016 and 2020
that show PM2.5 concentrations are consistently very low at the Central School site.
25. Under MfE’s grading criteria, 96% of daily mean concentrations measured at the site
achieved either an ‘excellent’ or a ‘good’ grading across the 2016 to 2021 period, with all
but one day of the remaining 4% falling into the ‘Acceptable’ category.
26. The annual mean concentration of PM2.5 at the Central School site across the 2016-2021
period was 4
enter the stormwater pits. It was recommended to
pump this ponded area down, as more rain was forecast.
The WTP sludge ponds on the stockpiling site had been completely flattened. Some sedimentation was
noted in the nearby drain, however, downstream was clear. The area of ponded drilling waste around the
irrigators was no longer present. Pasture strike is good in the recently landfarmed area. No issues were
noted.
2.1.2 Results of abstraction and discharge monitoring
2.1.2.1
Operations and Regulatory Agenda 13 February 2024
Waitotara. The remainder or irrigators are
generally located inland, between Inglewood and Eltham.
1.1.7 Irrigation systems
In general there are two types of irrigation methods; surface and pressurised. The majority of irrigation
systems currently in operation in the province fall in to the pressurised category. Pressurised systems can be
further differentiated based on the method of operation and equipment used. A summary of the systems
encountered in the region is given below.
K-line and
noted that seven intakes were now in place along the roofline of shed 3, that these
included fittings for shed air recirculation as at Midhirst, and that the boilers had been
installed and hot water radiators were being piped up inside each shed.
27. Osflo arrived about 10.45 am, and were to begin by emptying shed 4. With rain setting in, I
considered there would be little gain in continuing to monitor odour, and left the site about
11 am.
28. My observations on this occasion:-
irrigation methods; surface and pressurised. The majority of irrigation
systems currently in operation in the province fall in to the pressurised category. Pressurised systems can be
further differentiated based on the method of operation and equipment used. A summary of the systems
encountered in the region is given below.
K-line and long-lateral types – Impact sprinklers mounted on moveable laterals (Photo 1)
These are the most common systems found in the region, as they are a low cost
STDC Opunake WWTP Annual Report 2023 2024
abstraction
The Company monitors the volume of water abstracted. Groundwater level monitoring was instituted as a
requirement of consent 9608-1.2, held by DR Wilson for abstraction of groundwater at a location across the
Waitōtara River for irrigation of pasture land. Consent 9608-1.2 requires that abstraction ceases if the water
levels in the Company supply bores GND0585 and GND1195 fall below 104 m and 109 m respectively.
Consent 2261-3.1 requires that the Company record continuous water
2.4 Irrigation to Land of Leachate
Situated north of the compost and vermiculture operations is a series of leachate ponds that collects
run-off from these activities. In addition to the collection of leachate and stormwater that falls in the
composting area, wash down water from the truck wash is also collected in this pond; which further
dilutes the compost leachate.
Figure 2 highlights the area in purple, where water from these ponds are irrigated to land. Typically
irrigation
Regional Transport Committee Agenda June 2024