Annual report 2006-2007 - Taranaki Regional Council
Annual report 2006-2007 - Taranaki Regional Council Annual report 2006-2007 - Taranaki Regional Council
54 An additional inspection was undertaken in response to an odour complaint on 11 November 2006. The wind conditions were a moderate westerly, and an ambient odour survey down wind of property on boundary found light intermittent "sulphide" type odours. On site, staff outlined that de-hairing of possums skins had been taking place over the few 3-4 days. The process included the soaking of the skins in lime/sulphide solution. Staff also outlined that as a result of recent rainfall any odours found offsite may be due to a pig sty to the rear of the main building, which contained two or three sows and a small number of weaner pigs. The area was routinely cleaned, however odours increased during rain events. Although some point sources were present onsite the odours offsite were not found to be objectionable. The compliance monitoring inspection was conducted on 14 December 2006. It was found that all wastewater is directed to the final sump, where it is used to wash areas down. However, during the inspection it was found to be entering an alkathene pipe that discharged to the large freshwater pond. The consent holder was advised that this was to cease immediately, as it was not a consented activity. A pit located in the paddock to the rear of the site contained some offal, but this practice had since stopped. The stormwater area looked clear, with no chemicals stored outside. 4.4.1.2 Results of discharge monitoring The results of chemical monitoring of the discharge from Egmont Tanneries' stormwater drain for 2006-2007 year are presented in Table 15. The results of previous years' monitoring are summarised for comparison. Table 15 Results of Egmont Tanneries stormwater discharge monitoring during the 2006-2007 monitoring year, with summary of previous monitoring data. TRC site code STW001022 Date Temperature (°C) Cond (mS/m) pH Acid soluble Chromium (g/m3 ) Acid soluble Zinc (g/m3 ) Dissolved Zinc (g/m3 ) 18-Apr-07 13.1 22 6.8 - - 0.06 - Turbidity * (NTU) N 32 43 42 35 29 8 16 Maximum 17.7 12900 7.3 0.41 0.17 0.982 8.7 Minimum 9.9 14.5 1.0
55 acid soluble zinc concentration of 0.127 (g/m 3) and a dissolved zinc concentration of 0.126 (g/m 3), both well above their respective medians. This high zinc content is due to a historical event, where Taranaki Galvanisers waste was disposed of at the tannery site. Zinc (g/m3) Zinc concentrations in Egmont Tanneries stormwater discharge (STW001022) 0.2 0.15 0.1 0.05 0 Oct-91 Oct-92 Oct-93 Oct-94 Oct-95 Oct-96 Oct-97 Oct-98 Oct-99 Oct-00 Oct-01 Oct-02 Oct-03 Oct-04 Oct-05 Oct-06 Zinc (acid soluble) Zinc (dissolved) Zinc (total) Figure 18 Zinc concentrations in the Egmont Tanneries stormwater discharge 4.4.1.3 Results of receiving environment monitoring Consent condition 1 in resource consent 1816 states that after a mixing zone of 50m the discharge shall not give rise to the following effects in the receiving Kahouri Stream tributary: i) the production of any conspicuous oil or grease films, scums or foams, or floatable or suspended materials; ii) any conspicuous change in colour or visual clarity; iii) any emission of objectionable odour; iv) the rendering of freshwater unsuitable for consumption by farm animals; and v) any significant effects on aquatic life. Water chemistry and biological monitoring were conducted to assess compliance with the above. 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). One chemical monitoring site is located in the receiving waters downstream of the Egmont Tanneries discharge (site 6, KHI000369), which also encompasses discharges from Fletcher Concrete and Taranaki Galvanizers (Figure 1).
- 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 44 and 45: 2.6 Discussion 2.6.1 Discussion of
- 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 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 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
54<br />
An additional inspection was undertaken in response to an odour complaint on 11<br />
November <strong>2006</strong>. The wind conditions were a moderate westerly, and an ambient<br />
odour survey down wind of property on boundary found light intermittent<br />
"sulphide" type odours. On site, staff outlined that de-hairing of possums skins had<br />
been taking place over the few 3-4 days. The process included the soaking of the<br />
skins in lime/sulphide solution. Staff also outlined that as a result of recent rainfall<br />
any odours found offsite may be due to a pig sty to the rear of the main building,<br />
which contained two or three sows and a small number of weaner pigs. The area was<br />
routinely cleaned, however odours increased during rain events. Although some<br />
point sources were present onsite the odours offsite were not found to be<br />
objectionable.<br />
The compliance monitoring inspection was conducted on 14 December <strong>2006</strong>. It was<br />
found that all wastewater is directed to the final sump, where it is used to wash areas<br />
down. However, during the inspection it was found to be entering an alkathene pipe<br />
that discharged to the large freshwater pond. The consent holder was advised that<br />
this was to cease immediately, as it was not a consented activity. A pit located in the<br />
paddock to the rear of the site contained some offal, but this practice had since<br />
stopped. The stormwater area looked clear, with no chemicals stored outside.<br />
4.4.1.2 Results of discharge monitoring<br />
The results of chemical monitoring of the discharge from Egmont Tanneries'<br />
stormwater drain for <strong>2006</strong>-<strong>2007</strong> year are presented in Table 15. The results of<br />
previous years' monitoring are summarised for comparison.<br />
Table 15 Results of Egmont Tanneries stormwater discharge monitoring during the <strong>2006</strong>-<strong>2007</strong><br />
monitoring year, with summary of previous monitoring data. TRC site code STW001022<br />
Date<br />
Temperature<br />
(°C)<br />
Cond<br />
(mS/m)<br />
pH<br />
Acid soluble<br />
Chromium<br />
(g/m3 )<br />
Acid soluble<br />
Zinc<br />
(g/m3 )<br />
Dissolved<br />
Zinc<br />
(g/m3 )<br />
18-Apr-07 13.1 22 6.8 - - 0.06 -<br />
Turbidity *<br />
(NTU)<br />
N 32 43 42 35 29 8 16<br />
Maximum 17.7 12900 7.3 0.41 0.17 0.982 8.7<br />
Minimum 9.9 14.5 1.0
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