hydrocarbons.
Table 2 Injection well details
Wellsite Consent Injection well(s) TRC bore id. Formation
Manutahi-D 7905-1.1
D2H GND2307
Manutahi
D4HST1 GND2309
Manutahi-B 10546-1
10575-1
Manutahi-B2
(upper and lower)
GND3017 Manutahi
1.4.5 Groundwater sampling
Groundwater samples in relation to the DWI monitoring programme were obtained on two occasions
during the monitoring period. This sampling is a continuation of the groundwater monitoring component of
this
all occasions. Previously landfarmed areas held good pasture
cover.
During the early part of the monitoring year the groundwater samples demonstrated stability for the
analytes tested. However, in the latter part of the monitoring year there was a rise in analytes in two of the
monitoring bores whilst the others remained relatively stable.
Bore GND2303 was severely damaged during the previous monitoring year and some rehabilitation was
attempted. However, during the second half of the
Stratford landfill 8
Figure 5 Graph showing dissolved zinc levels in the groundwater at the Stratford landfill 9
Figure 6 Graph showing unionised ammonia levels in the down gradient bore (GND1014) groundwater
and the downstream surface water sites (PAT000315 and PAT000345) at the Stratford landfill 9
Figure 7 Graph showing ammoniacal nitrogen levels in the Pātea Stream up and downstream of the
landfill (where comparative data is available) 11
Figure 8 Biomonitoring sites with taxa
Consent Injection well TRC bore id. Formation
Cheal-A
9545-2.1
Cheal-A4 GND2328 Urenui
Cheal-A7 GND2678 Urenui
10354-1.1
Cheal-A2 GND2570 Mount Messenger
Cheal-A7 GND2678 Mount Messenger
Cheal-B 10254-1 Cheal-B3 GND2571 Mount Messenger
Cheal-E 10304-1.1
Cheal-E4 GND2714 Mount Messenger
Cheal-E7 GND2572 Mount Messenger
1.4.5 Groundwater sampling
Groundwater samples were obtained on two occasions in the vicinity of the Cheal wellsites during the
monitoring
parameter probe) have stabilised to within 8% over a five minute
period, or within three well volumes, prior to the sample being collected.
A survey into contamination across the property was undertaken by the consultants PDP on behalf of the
Company during the year, as directed by the Court. This survey included the installation of four additional
bores in the vicinity of Pad 3 and the irrigation wastewater holding pond, in order to assess for leakage from
the pond and/or Pad 3.
Soil
• pH;
• conductivity;
• suspended solids;
• chlorides; and
• total petroleum hydrocarbons.
page
8
Table 2 Injection well details
Wellsite Consent Injection well TRC bore id. Formation
Waihapa-D 3688-2 Waihapa-5 GND1752 Tikorangi limestone
Waihapa-F 4094-2 Waihapa-7A GND1684 Matemateaonga
Waitapu 10086-1 Waitapu 2 GND2529 Mount Messenger
Toko-E 10708-1 Toko-2B GND1605 Tikorangi limestone
Waihapa-B 10763-1
Waihapa-2 GND1627
Kiore and Mount
municipal landfill consents and their key dates 3
Table 2 Council monitoring activity in relation to the STDC closed municipal landfills in the year under
review 4
Table 3 Summary of performance for Eltham closed landfill consent 3387-3 7
Table 4 Chemical analysis of the Hāwera landfill leachate samples (RTP001008) 11
Table 5 Chemical analyses of groundwater samples from the bores at Hāwera landfill 14
Table 6 Chemical analysis of surface water in the vicinity of the Hāwera landfill
of the pumping bore. The potential effects of any groundwater abstraction are assessed by the
Council during the processing of a resource consent application for a groundwater take. The potential
page
7
impact of any new take on existing groundwater users and ecological receptors form a major component of
this assessment.
Groundwater levels in coastal bores should generally be maintained above mean sea level to avoid the risk
of sea water intrusion into the
number Purpose Granted Review Expires
Water abstraction permit
7010-1
To take and use up to 3,500 m3/day groundwater at a
maximum rate of 40 L/s as a combined total from up to seven
water bores in a bore field for the purpose of horizontal
directional drilling, pipeline hydro-testing, production station
operation at the Kupe production station and operations at the
Manutahi-D, Manutahi-C, and Kauri-F wellsites
November
2006
June
2029
June
2039
Water discharge
(with a fish
pass) in the Wairau Stream and disinfected with
chlorine gas. The surface water take and backwash
discharge consents have been retained for
contingency purposes, but have not been exercised
since 2006.
1278 - Take 2025 2031 Take and use water from the Wairau Stream for
Oakura water supply purposes
5713 - Land use 2025 2031 To use a weir to dam the Wairau Stream for
Oakura water supply purposes
6114 – Take - 2020* To take and use groundwater from two bores for
Oakura