Annual report 2006-2007 - Taranaki Regional Council

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88 what effects the discharge shall not give rise to beyond a discharge mixing zone of 50 metres downstream of the confluence of the tributary with the Kahouri Stream. Special condition 8 is a review condition. 9.3 Monitoring programme The monitoring programme for Ballance Agri-Nutrients Limited consisted of three primary components in addition to programme liaison and management. 9.3.1 Site inspections The Ballance site was visited once during the monitoring period. With regard to consents for the discharge of stormwater, the main points of interest were site activities with potential or actual discharges to receiving watercourses. The neighbourhood was surveyed for environmental effects. 9.3.2 Chemical sampling The Taranaki Regional Council undertook sampling of the water quality in the Kahouri Stream downstream of the confluence with the unnamed tributary that receives the Ballance discharge (Site 3, Figure 1) on one occasion during the monitoring year in conjunction with the low flow survey. The summer low flow survey of water quality in the Kahouri catchment is a shared survey between several industries. In relation to Ballance Agri-Nutrients Ltd, site 3 (Kahouri below abattoirs) was sampled, and analysed for conductivity, pH, turbidity, suspended solids, dissolved oxygen, BOD5, ammonia, dissolved reactive phosphorus, zinc (dissolved) and E. coli (Table 2). 9.3.3 Biomonitoring surveys One shared biological survey was performed in seven sites in the Kahouri Stream catchment on 17 April 2007 to determine whether or not the discharges from the various industries have had a detrimental effect upon the communities of the stream. The location of these sites is shown in Figure 1. When assessing the effects of the Ballance Agri-Nutrients Ltd, site A (in the Kahouri Stream, upstream of the tributary that receives the Ballance discharge) and C (in the Kahouri Stream, 50 m downstream of the tributary that receives the Ballance discharge) were used to assess the effects of the discharge on the biological communities of the stream. 9.4 Results 9.4.1 Water 9.4.1.1 Inspections The routine annual inspection was performed on 14 December 2006. The site was very tidy, with almost all contaminants stored inside. A large diesel tank was stationed outside, with appropriate bunding. However, the tap draining the bund was open, which nullifies the bund. The consent holder was advised that this tap needed to be closed at all times, except for when draining rainwater.
9.4.1.2 Receiving water monitoring Water chemistry The chemical water quality survey for the summer low-flow period was performed on 18 April 2007 during fine weather. The results for all sites in the 2007 survey are presented in Table 4 (refer to Section 2.4.2.2). The sampling sites relevant to the Ballance Agri-Nutrients site are sites 1 and 3, which also encompass discharges from the Taranaki Abattoirs site. The results for these sites are discussed fully in Section 2.4.2.2. There is the potential that the Ballance discharge contributed to the raised levels of nutrients recorded in the Kahouri Stream. However, it is unlikely that this contribution was significant, when compared to the Taranaki Abattoirs discharge, when the nutrient concentrations and rate of discharge from the respective sites are considered. 89 Biological survey A macroinvertebrate sample was collected from sites A and C (Figure 1) in the Kahouri Stream on 17 April 2007. The sample was sorted and identified to provide the number of taxa (richness), MCI and SQMCIS scores for each site. The MCI is a measure of the overall sensitivity of the macroinvertebrate community to the effects of organic pollution in stony streams. It is based on the presence/absence of taxa with varying degrees of sensitivity to environmental conditions. It may be used in soft-bottomed streams to detect trends over time. The SQMCIS takes into account taxa abundance as well as sensitivity to pollution, and may reveal more subtle changes in communities, particularly if non-organic impacts are occurring. Significant differences in either MCI or SQMCIS between sites indicate the degree of adverse effects (if any) of discharges being monitored. These results are discussed in full in Section 2.4.2.2, with a full biological report given in Appendix II. This summer survey of macroinvertebrate communities in the Kahouri Stream indicated that the communities directly downstream of the tributary that receives the Taranaki Abattoirs and Ballance Agri-Nutrients discharges were significantly different than those upstream, where taxa richness and MCI score were slightly healthier than median community conditions recorded previously at this ‘control’ site. There was a significant decrease in MCI and SQMCIS scores at the lower site, which may have been due to additional instream nutrients supplied by the tributary. This is likely to be due to the impacts from the abattoir, but this is unclear without further monitoring. Therefore it is recommended that additional sites be included in subsequent surveys to assess the impact of the abattoir discharge on this unnamed tributary. 9.5 Register of incidents The Taranaki Regional Council operates and maintains a register of all complaints or reported and discovered excursions from acceptable limits and practices, including non-compliance with consents, which may damage the environment. The register (‘unauthorised incident register’) includes events where the company concerned has itself notified the Council. The register contains details of any investigation and corrective action taken.
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Kahouri Stream Monitoring Programme
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Six complaints, which were logged a
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ii 2.7 Recommendations 37 3. Tarana
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iv 6.6.4 Recommendations from the 2
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vi List of tables Table 1 Resource
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Figure 6 Biological oxygen demand (
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Section 11 presents recommendations
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1.2.1 Other resource consents A tot
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Figure 1 Biological and chemical mo
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2. Taranaki Abattoir Co (1992) Limi
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10 Waste liquor and floor washings
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2.2.2 Water discharge permit 12 Sec
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24 March 2005, under Section 87(e)
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16 plant staff were made aware of t
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18 inspection, staff also outlined
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Dissolved oxygen (g/m 3 ) 35 30 25
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Dissolved Reactive Phosphorus (g/m3
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24 In comparing the results (upstre
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26 Biological survey The Council’
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SQMCIs Value 7 6 5 4 3 2 1 0 A C E
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2.6 Discussion 2.6.1 Discussion of
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Table 7 Summary of performance for
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34 Condition requirement Means of m
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36 1. THAT monitoring of air emissi
Page 52 and 53: 3. Taranaki Galvanizers 3.1 Process
Page 54 and 55: Special condition 4 defines the mix
Page 56 and 57: 42 underneath the galvanising plant
Page 58 and 59: NH 4 -N (g/m 3 ) 44 Ammoniacal nitr
Page 60 and 61: 3.4.2 Air 46 Air monitoring in the
Page 62 and 63: 48 Table 14 Summary of performance
Page 64 and 65: 4. Egmont Tanneries Limited 4.1 Pro
Page 66 and 67: permit was issued by the Taranaki R
Page 68 and 69: 54 An additional inspection was und
Page 70 and 71: 56 Table 16 Results of summer low-f
Page 72 and 73: 58 In the 2006-2007 year, there was
Page 74 and 75: Table 19 Summary of performance for
Page 76 and 77: 62 In the case of Egmont Tanneries,
Page 78 and 79: 5.3 Monitoring programme The monito
Page 80 and 81: 66 Water chemistry The chemical wat
Page 82 and 83: Table 22 Summary of performance for
Page 84 and 85: 6. Contact Energy Limited (closed p
Page 86 and 87: 72 not suggest that discharges from
Page 88 and 89: 74 7. Contact Energy Limited (CCPS)
Page 90 and 91: 7.3.2 Biomonitoring surveys 76 One
Page 92 and 93: 78 Condition requirement Means of m
Page 94 and 95: 8. Fletcher Concrete & Infrastructu
Page 96 and 97: 8.3.2 Chemical sampling 82 The Tara
Page 98 and 99: 84 The stream at this site had a cl
Page 100 and 101: 8.6.5 Alterations to monitoring pro
Page 104 and 105: 90 Incidents may be alleged to be a
Page 106 and 107: 10. Water quality in the Kahouri ca
Page 108 and 109: 94 Most MCI scores were similar to
Page 110 and 111: 96 12. Summary of recommendations 1
Page 112 and 113: NH3 unionised ammonia, normally exp
Page 115: Appendix I Resource consents held b
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To Job Manager, B Jansma From Scien
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Figure 1 Biomonitoring sites in the
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Table 3 Macroinvertebrate fauna of
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MCI value 140 120 100 80 60 40 20 0
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Site E: Kahouri Stream (KHI000400)
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mayflies, elmid beetles, Archichaul
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Further downstream at Flint Road, t
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Annual report 2006-2007 - Taranaki Regional Council

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