Summary of performance for Consent 6388-1 52
Table 25 Summary of performance for Consent 6390-1 53
Table 26 Summary of performance for Consent 6391-1 54
Table 27 Summary of performance for Consent 6381-1 55
Table 28 Summary of performance for Consent 6385-1 56
Table 29 Summary of performance for Consent 6386-1 57
Table 30 Summary of performance for Consent 6387-1 58
Table 31 Evaluation of overall environmental performance over time 58
List of figures
Figure 1 Main
Taranaki Regional Public Transport Plan 2020-2030
forestry and construction of 22 km of retirement
fencing to retire 400 ha of marginal land.
For the October/November reporting period, 4.2 kilometres of fencing to
protect 23 hectares of reversion and retirement, and 39 hectares of new
forestry is reported. For the May reporting period, 15 kilometres of fencing
to protect 53 hectares of reversion and retirement and 11 ha of forestry is
projected.
Scoreboard – Outputs/Key performance indications
- - <20 380
TPH C15-C36 mg/kg 4,000 3900 690 - - - <40 2200
Total Petroleum
Hydrocarbon
(Hill)
mg/kg
DW - 4500 740 - - - <70 2500
Total Petroleum
Hydrocarbon
(Council)
mg/kg - - 819 239 - 429 - 3654
Benzene mg/kg 1.1 <0.07 <0.05 - - - <0.05 <0.05
Toluene mg/kg 68 <0.07 <0.05 - - - <0.05 <0.05
Ethylbenzene mg/kg 53 <0.07 <0.05 - - - <0.05 <0.05
Xylene-m&p mg/kg 48 <0.14 <0.10 - - - <0.10 <0.10
Xylene-o mg/kg 48 <0.07 <0.05 - - - <0.05 <0.05
significant change in turbidity.
page
15
Table 5 Summary of treated wastewater analyses from the NZ Pure Bred Genetics Ltd piggery for
the period July 2010 to June 2015, compared with results for 2015-2016 median
Parameter unit N Range 2010-2015 Median 2010-2015 Median 2015-2016
Conductivity @ 20°C mS/m 7 61.6 - 175 157 75.4
Chloride g/m³ 7 24.2 – 65.7 54 59
pH pH 7 7.6 – 8.1 7.8 7.6
Total carbonaceous BOD5 g/m3 5 80 - 120 94 53
Ammoniacal nitrogen
Ammoniacal nitrogen concentration in the under liner drainage 41
Figure 9 Sampling sites on the Puremu Stream downstream of the landfill 45
Figure 10 Biomonitoring sites related to the Colson Road landfill, New Plymouth 53
page
iv
Figure 11 Chloride concentrations in the Colson Road groundwater bores, June 2006 to date 58
Figure 12 Nitrate/nitrite nitrogen concentrations in the Colson Road groundwater bores, June 2006 to
date 59
Figure 13 Methane and temperature
NPDC New Plymouth WWTP Annual Report 2021-2022
results from monthly samples: Mangaehu River at
Raupuha Road 52
Table 34 Statistical summary of data from July 2013 to June 2014:
Mangaehu River at Raupuha Rd 53
Table 35 Statistical summary of data from July 1995 to June 2014: Mangaehu
River at Raupuha Road 53
Table 36 Some comparative water quality data for the eleven TRC SEM
sites for the nineteen-year period July 1995 to June 2014 (n = 228
samples) 58
Table 37 Some comparative water quality data for the three NIWA SEM
sites
Investigations, interventions, and incidents 40
3. Discussion 43
3.1 Discussion of site performance 43
3.2 Environmental effects of exercise of consents 44
3.3 Evaluation of performance 44
3.4 Recommendations from the 2009-2010 Annual Report 51
3.5 Alterations to monitoring programmes for 2014-2015 51
3.6 Exercise of optional review of consent 51
4. Recommendations 53
Glossary of common terms and abbreviations 54
Bibliography and references 57
page
ii
Appendix I
dry wt 460 310 330 320 250
Soluble Salts g/100g dry wt 0.25 0.08 0.13 0.08 < 0.05
Sodium Absorption Ratio
(SAR) mmol/L0.5 <18 2.0 2.5 2.4 1.6
Benzene mg/kg dry wt 1.1 < 0.05 < 0.05 < 0.05 < 0.05
Toluene mg/kg dry wt 68 < 0.05 < 0.05 < 0.05 < 0.05
Ethylbenzene mg/kg dry wt 53 < 0.05 < 0.05 < 0.05 < 0.05
m&p-Xylene mg/kg dry wt 48 < 0.10 < 0.10 < 0.10 < 0.10
o-Xylene mg/kg dry wt 48 < 0.05 < 0.05 < 0.05 < 0.05
C7 - C9 mg/kg dry wt <120 < 20 < 20 < 20 < 20
C10 -