Annual report 2006-2007 - Taranaki Regional Council

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5.3 Monitoring programme The monitoring programme for Transpower NZ Ltd consisted of three primary components in addition to programme liaison and management. 5.3.1 Site inspections 64 The Transpower site was visited once during the monitoring period. With regard to consents for the discharge to wastewater, the main points of interest were plant processes with potential or actual discharges to receiving watercourses. The neighbourhood was surveyed for environmental effects. 5.3.2 Chemical sampling The Taranaki Regional Council undertook sampling of both the discharge from the sand filters (site 9, Figure 1) and the water quality upstream and downstream of the discharge point and mixing zone (sites 7 and 10, Figure 1) on one occasion during the monitoring year in conjunction with the low flow survey. The sewage discharge (site 9) was analysed for conductivity, pH, turbidity, suspended solids, biochemical oxygen demand, ammonia, nitrate, dissolved reactive phosphorus and E. coli bacteria. The summer low flow survey of water quality in the Kahouri catchment is a shared survey between several industries. In relation to Transpower NZ Ltd, Sites 7 (Flint Rd) and 10 (above Piakau confluence) were sampled, and analysed for conductivity, pH, turbidity, suspended solids, ammonia, nitrate, dissolved reactive phosphorus and E. coli bacteria (Table 2). 5.3.3 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 Transpower NZ Ltd discharge, site F (in the Kahouri Stream, upstream of the discharge) and G (in the Kahouri Stream, 80 m downstream of the discharge) were used to assess the effects of the discharge on the biological communities of the stream. 5.4 Results 5.4.1 Water 5.4.1.1 Inspections One inspection of the Transpower NZ Ltd site was conducted during the 2006-2007 monitoring year. This inspection was conducted on 20 June 2007. It was found that the sand filters benefit from weeds being sprayed, and the surface being turned over and raked. This
65 would alleviate some of the ponding noted during inspection. The system was found to be discharging during the inspection. 5.4.1.2 Results of discharge monitoring The results of chemical monitoring of the sewage discharge from Transpower NZ Ltd for 2006-2007 year are presented in Table 21. A summary of the results of previous years' monitoring are summarised for comparison. Site Table 21 Results of Transpower NZ Ltd discharge and related receiving water monitoring on 18 April 2007, with summary of previous monitoring data BOD (g/m3) Cond (mS/m) DRP (g/m3 P) E.coli (nos/100ml) FC (nos/100ml) NH3 (g/m3 ) NH4 (g/m3 N) N-N-N (g/m3 N) SWG002004 1.1 9.5 0.637 3 3 0.00002 0.022 3.55 6.5
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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
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 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 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
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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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