analysis 59 2.8 Kapoaiaia Stream 61 2.8.1 Flow data and survey dates 63 2.8.2 Periphyton cover 63 2.8.3 Periphyton Index Score 65 2.8.4 Summary of 2002-2012 (10 year data set) 66 2.8.5 Long term trend analysis 67 2.9 Waiongana River 71 2.9.1 Flow data and survey dates 72 2.9.2 Periphyton cover 72 2.9.3 Periphyton Index Score 74 2.9.4 Summary of 2002-2012 (10 year data set) 74 2.9.5 Long term trend analysis 76 2.10 Mangaehu River 79 2.10.1 Flow data and survey dates 80 2.10.2
monitoring inspection and to take water samples. The weather was fine with 13 mm rain falling over previous 72 hours and the stream system was in low flow. A truck was discharging drilling muds and a digger was operating blending in sawdust at time of inspection. A discussion was held with the digger driver and site manager on the drainage issues at the top of the lower irrigation area and the installation of novaflo in a few swampy areas on the main irrigation flats. Discussion included the
Regional Transport Committee Agenda March 2025
Operations and Regulatory Committee Agenda November 2024 WEBSITE
previously had a MCI target of 72 units using the hard-bottom score but this has been revised to a soft- page 11 bottomed MCI (MCI-sb) of 73 units based on the 25th percentile of historical data. Site 13 has a tentative target of MCI-sb 90 units. During all four surveys, the Kapuni Stream had scores above 100 MCI-hb indicating ‘good’ to ‘excellent’ macroinvertebrate health, while the two tributary sites had MCI-sb scores between 93 and 113 units indicating ‘fair’ to ‘good’
Hydrocarbons in sediment – mg/kg dry weight 100m u/s of discharge MHW000060 50m d/s of discharge MHW000065 200m d/s of discharge MHW000066 250m d/s of discharge MHW000068 3 June 2011 49 130 - 190 12 April 2013 < 10 170 - 56 6 June 2014 < 0.5 94 - (no sample) 8 January 2015 11 34 - 87 2 April 2015 20 114 - 62 9 December 2015 < 14 39 - 40 1 April 2016 < 18 < 17 - 99 28 February 2017 93 443 - 235 28 April 2017 29 72 - 38 25 October 2017 16
1 MWH000380 5 MWH000490 15 25 18 27 10-25 [16] 13-25 [19] 12-24 [16] 16-30 [24] 83 90 72 83 58-85 [73] 63-86 [77] 72-85 [76] 84-102 [90] 41 36 12 12 Waingongoro River 6 WGG000620 7 WGG000640 8 WGG000665 - - 19 20 28 21 16-35 [27] 17-35 [26] 14-30 [21] 19-28 [24] 21-31 [27] 14-27
69 Appendix I High tide times 72 Appendix II MAC assessments 76 page iii List of tables Table 1 Surveillance, Alert and Action levels for marine waters (2003) 2 Table 2 Microbiological Assessment Categories 3 Table 3 Suitability for recreation grade (SFRG) for coastal recreational areas in the Taranaki region, November 2006 to April 2011 4 Table 4 Location of bathing water bacteriological sampling sites 2011-2012 6 Table 5 Coastal bathing
consent 1857-6. Table 2 Results of combined discharge (STW001027) and receiving water (MGO000031) monitoring for the 2013-2014 year Date Sampling point Temp (oC) pH Conductivity (mS/m) Suspended Solids (g/m3) Dissolved Copper* (g/m3) Dissolved Zinc* (g/m3) 30.6.14 STW001027 13.6 7.1 6.9 72 0.023 0.393 MGO000031* 13.3 7.1 13.9 18 0.004 0.020 *USEPA acute criteria for dissolved metals: Cu 0.0088 g/m3 and Zn 0.064 g/m3 [at hardness of 50 g/m3