Annual report 2006-2007 - Taranaki Regional Council

More documents

Recommendations

Info

2.6 Discussion 2.6.1 Discussion of plant performance 30 In general, Taranaki Abattoir Company's facilities were managed in a poor manner in terms of compliance with conditions on the air discharge consent. Compliance with the discharge to water consent was on the whole good, although for the third year running the Company had been in breach of special condition 1 of that consent. This condition required that “the discharge shall not raise the ambient BOD5 of the Kahouri Stream by greater than 1 gram per cubic metre when measured at a point 50 metres downstream of its confluence with the tributary into which the discharge enters”. Also of concern is that nutrient concentrations in the discharge have recently increased, which may be a reflection of the increased production at the abattoir. This consent was renewed in November 2007, and will expire in June 2010. The consent was given such a short duration, as it was accepted that the Company needed to undertake research on their wastewater system, before any long term consent could be granted. This allowed the Company to continue operating, while researching for the most efficient treatment system. While this may allow the continuation of certain impacts on the Kahouri Stream catchment, it is unlikely that these impacts will worsen before the consent expires. Compliance with the other three resource consents held was generally satisfactory. Housekeeping was generally found to be good through most of the plant during inspections. Throughout the previous monitoring period the Company made some efforts to reduce the incidence of offensive or objectionable odours being discharged off site. One such improvement was the addition of a cooling drum, which reduced the temperature of the non-condensable gases prior to those gases passing through the biofilter. While this initially caused some problems, the design was improved and the desired outcome achieved. Significant reductions were made in the amount of product accepted for rendering, which reduced the incidence of off-spec product being brought onto the site. This made a significant contribution improving the air discharges from the site, and follows up from the comments made in the previous monitoring report. It is primarily these changes, combined with an improvement in site management, which has led to a dramatic decrease in incidents logged against the site. The spreading of blood and biosolids on land, with regular addition of lime and trace minerals, has been successful. The worm farm caused some odours to occur off site and this area needs to be managed carefully to reduce odours particularly during the summer months. The Company notified the Council on several occasions during the year when disturbance in the worm farm area was occurring, which had the potential to increase the discharge of odour. During the previous monitoring year, a review of the contingency plan was received, and a revised version was accepted on 29 May 2006. This contingency plan is in place for the processing and/or disposal of any unprocessed material in the event of plant equipment failure or any other loss of processing capacity. This contingency plan
31 also referred to the new consent 6570 granted in the monitoring year under review, however a waste burial management plan is required under the new consent to bury raw degenerating product to land. Matters that should be addressed in the management plan are detailed in special condition 5. Many of these matters have been addressed in the contingency plan, however some still need to be detailed or expanded on further. This will be addressed in the upcoming monitoring year. 2.6.2 Environmental effects of exercise of consents The low flow water quality survey indicated that the discharge was increasing the BOD5 above consented levels in the receiving water, and elevating the nutrients in the Kahouri Stream downstream of the confluence with the tributary that receives the Taranaki Abattoir discharge to well in excess of ANZECC water quality guidelines. The results of the April 2007 biomonitoring survey 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. In relation to air emissions, in the 2006-2007 year, there were 5 incidents related to odours emitted outside the site boundary, 1 of which was considered to be offensive and therefore did not comply with special condition 3 of consent 4055, having significant adverse effects on neighbouring properties. This consent condition requires that at no time shall the consent holder cause or allow an odour at or past the legal boundary of the consent holder’s site that in the opinion of an enforcement officer of the Taranaki Regional Council is noxious or offensive or objectionable. Further, on one occasion, it was found that non-condensable gases were being vented direct to air, which did not comply with special condition 17. In response to the discharge of objectionable odours, one infringement notice was issued during the 2006-2007 monitoring year. This is a significant improvement from the previous monitoring year, in which the Company was prosecuted for the discharge of objectionable odour. 2.6.3 Evaluation of performance A tabular summary of the Company’s compliance record for the year under review is set out in Tables 7 to Table 11.
Page 1: Kahouri Stream Monitoring Programme
Page 4: Six complaints, which were logged a
Page 7 and 8: ii 2.7 Recommendations 37 3. Tarana
Page 9 and 10: iv 6.6.4 Recommendations from the 2
Page 11 and 12: vi List of tables Table 1 Resource
Page 13: Figure 6 Biological oxygen demand (
Page 16 and 17: Section 11 presents recommendations
Page 18 and 19: 1.2.1 Other resource consents A tot
Page 20 and 21: Figure 1 Biological and chemical mo
Page 22 and 23: 2. Taranaki Abattoir Co (1992) Limi
Page 24 and 25: 10 Waste liquor and floor washings
Page 26 and 27: 2.2.2 Water discharge permit 12 Sec
Page 28 and 29: 24 March 2005, under Section 87(e)
Page 30 and 31: 16 plant staff were made aware of t
Page 32 and 33: 18 inspection, staff also outlined
Page 34 and 35: Dissolved oxygen (g/m 3 ) 35 30 25
Page 36 and 37: Dissolved Reactive Phosphorus (g/m3
Page 38 and 39: 24 In comparing the results (upstre
Page 40 and 41: 26 Biological survey The Council’
Page 42 and 43: SQMCIs Value 7 6 5 4 3 2 1 0 A C E
Page 46 and 47: Table 7 Summary of performance for
Page 48 and 49: 34 Condition requirement Means of m
Page 50 and 51: 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 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 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 102 and 103:
88 what effects the discharge shall
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
Page 173 and 174:
To Job Manager, B Jansma From Scien
Page 175 and 176:
Figure 1 Biomonitoring sites in the
Page 177:
Table 3 Macroinvertebrate fauna of
Page 180 and 181:
MCI value 140 120 100 80 60 40 20 0
Page 182 and 183:
Site E: Kahouri Stream (KHI000400)
Page 184 and 185:
mayflies, elmid beetles, Archichaul
Page 186 and 187:
Further downstream at Flint Road, t
show all

Annual report 2006-2007 - Taranaki Regional Council

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?