hydrogeologic conditions (Taylor and Evans, 1999). These result in a complex
system of unconfined, perched and semi confined aquifers within the volcanic deposits. The water table in
the ring plain area is typically encountered between 1 to 10 m below ground level. Seasonal variations in
water table depth of up to 5 m are common. Groundwater flow generally reflects surface topography and
flows radially from Mount Taranaki. Recharge to the Taranaki volcanic aquifers is mainly by rainfall
three day period
following significant river/stream fresh conditions. [NB: regional differences in
rainfall patterns have caused difficulties at various sites in the past as localised
rainfall may impact on bacteriological quality on isolated occasions]. Where
necessary, a 2 metre sampling pole was used for bacteriological sample collection
immediately beneath the water surface and at a minimum of calf depth at the sites.
Thirteen samples were collected from all but one site (12 samples)
increasingly popular as storage system, which is easy to install, reduces odour and no
rainfall into the tank means you can considerably reduce the amount of storage needed, an option to consider
in high rain fall areas.
Typically, farm dairy effluent is directed to a sand trap then tank with pump system, effluent is then applied
directly to land or to the bladder.
The Bladder will have a return valve, effluent is gravity feed from the bladder back to the tank, were it is then
applied to land
ANZCO Foods Eltham Annual Report 2023-2024
dot) 8
Figure 6 E-BAM set-up and instillation at Central School, New Plymouth 9
Figure 7 Location of Meteorological Stations with respect to the Central School monitoring site 11
Figure 8 Wind rose for the whole monitoring period (from hourly data) 12
Figure 9 Frequency of rainfall with wind direction 12
Figure 10 Boxplots of daily mean PM2.5 over the monitoring period 14
Figure 11 Number of days per year with PM2.5 concentrations 15
Figure 12 Temporal variations in …
6). Contrary to historical
data, the upstream site had higher E. coli numbers, with counts 10m downstream of the unnamed tributary
lower than both upstream and the stream at the beach sites. As the Wai-iti Stream is surrounded by
farmland, it is therefore unlikely that high FIB counts were only attributed to the WWTP in operation.
Additionally, the area experienced moderate to heavy rainfall from early to mid-morning three days prior to
sampling. The accumulation of agricultural, stormwater
location map 4
Figure 2 Burial Plan for first five years of operation 9
Figure 3 Groundwater elevations 2019-2020 in comparison to rainfall 24
Figure 4 Groundwater levels GND2624-north 25
Figure 5 Groundwater levels GND2627-north 25
Figure 6 Groundwater levels GND2625-east 26
Figure 7 Groundwater levels GND2623-west 26
Figure 8 Groundwater levels GND2484-south 27
Figure 9 Groundwater levels GND3032-south 27
Figure 10 Type of internment planned for Area-A and …
opportunities and constraints for improving farm dairy effluent management .......... 23
6.1 Soil characteristics .................................................................................................................... 23
6.2 High rainfall and seasonal considerations ............................................................................ 23
6.3 Taranaki river flows and characteristics ............................................................................... 24
6.4
ponds
2014-2015 (between hours of 1100 – 1400). Data from pond
outlet. 13
Figure 3 Faecal coliform numbers in the HWWTP effluent(s), 1992 to
2015 15
Figure 4 Daily discharge volumes (m3/day) from the Hawera
oxidation ponds system and daily rainfall data (mm) from a
Council rainfall station approximately 5 km east of the
Hawera oxidation ponds, 1 July 2014 to 30 June 2015 17
page
iv
Figure 5 Location of marine ecological monitoring sites 18
Figure 6 Mean
measured and achieved. In first iteration plans, it will
also be particularly difficult to meet many of these ‘musts’, rather it will be a case of making
incremental progress over time.
• The E.coli component of the NOF is problematic. The E.coli grade is based on the lowest scoring
area across four different criteria. One of these – the 95th percentile – is highly influenced by
heavy rainfall. In a region like Taranaki, where such rainfall is common, achieving the
improvements