Puremu and Manganaha Streams related to the Colson Road
Landfill 59
Table 15 Groundwater sampling sites 62
Table 16 Chemical analysis of the groundwater samples collected during the year under review 63
Table 17 Feedstock gas hydrogen sulphide concentration test results 72
Table 18 Statistical summary of the Colson Road landfill gas flare non-operational hours for the year
under review 73
Table 19 Air deposition monitoring results for January and February 2020 74
Table 20 …
application and estimated loading rates 34
2.1.6 Groundwater monitoring 36
2.1.6.1 Groundwater discussion 49
2.1.7 Soil monitoring 49
2.1.8 Biomonitoring of the Haehanga Stream 72
2.2 Air 78
2.3 Incidents, investigations, and interventions 80
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3 Discussion 85
3.1 Discussion of site performance 85
3.2 Environmental effects of exercise of consents 89
3.3 Evaluation of performance 98
3.4 Recommendations from the 2019-2020 Annual Report 122
3.5
15.8 Bore
damaged
Bore
damaged
Electrical
Conductivity (EC)
µS/cm 504 538 - -
mS/m 50.4 53.8 - -
Total Dissolved
Solids (TDS) g/m3 300 260 - -
Acid Soluble Barium g/m3 < 0.11 < 0.11 - -
Dissolved Barium g/m3 0.037 0.044 - -
Chloride g/m3 72 76 - -
Total Sodium g/m3 58 64 - -
pH pH Units 6.8 6.5 - -
This monitoring well has recorded some elevated saline impacts to groundwater previously (Figures 12-14).
The fluctuations in EC, TDS and chloride appear
three dimensions) of the
discharge location over the 72 hour period following hydraulic fracturing.
2.2 Physiochemical sampling
2.2.1 Groundwater
Hydraulic fracturing activities in the Kowhai-6 well commenced on 7 December 2018 and continued until 28
March 2019. A pre-fracturing baseline sample was collected on 30 August 2018. Post-fracturing samples
were collected three months, eight months and one year following commencement of the activities on 29
March 2019, 19 August 2019 and 10 …
30
Kaupokonui River 35
Kurapete Stream 46
Maketawa Stream 50
Mangaehu River 54
Manganui River 56
Mangaoraka Stream 60
Mangati Stream 62
Mangawhero Stream 66
Mangorei Stream 70
Patea River 72
Punehu Stream 78
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Tangahoe River 82
Timaru Stream 88
Waiau Stream 92
Waimoku Stream 94
Waingongoro River 98
Waiokura Stream 110
Waiongana Stream 114
Waitara River 118
Waiwhakaiho River
(WKH000950) 50
3.2.5.5 Discussion 53
3.2.6 Mangorei Stream 54
3.2.6.1 SH3 site (MGE000970) 54
3.2.6.2 Discussion 57
3.2.7 Manganui River 58
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3.2.7.1 State Highway 3 site (MGN000195) 58
3.2.7.2 Bristol Road site (MGN000427) 61
3.2.7.3 Discussion 63
3.2.8 Maketawa Stream 65
3.2.8.1 Derby Road (MKW000200) 65
3.2.8.2 Tarata Road site (MKW000300) 68
3.2.8.3 Discussion 71
3.2.9 Waitara River 72
3.2.9.1 Mamaku Road site (WTR000850) 72
3.2.9.2
Policy & Planning Committee agenda July 2019