14.6 Rules - Stormwater

1. The discharge^ must not include stormwater from any:
   1. industrial or trade premises^ where hazardous substances* stored or used may be entrained by the stormwater
   2. contaminated land^ where the contaminants^ of concern may be entrained by the stormwater
   3. operating quarry or mineral^ extraction site*

                 unless there is an interceptor
                 system* in place.

1. The discharge^ must not cause or exacerbate the flooding of any other property*.
2. The activity must not cause erosion of any land^ or the bed^ of any water body^ beyond the point of discharge^ unless this is not practicably avoidable, in which case any erosion that occurs as a result of the discharge^ must be remedied as soon as practicable.
3. There must be no discharge^ to any rare habitat*, threatened habitat*, at-risk habitat*, or reach of river^ or its bed^ with a Schedule B Value of Natural State.
4. For discharges^ of stormwater onto or into land^:
   1. the discharge^ must be below a rate that would cause flooding outside the design discharge^ soakage area, except in rain events equivalent to or greater than the 10% annual exceedance probability design storm. Any exceedance must go into designated overland flow paths
   2. there must not be any overland flow resulting in a discharge^ to a natural surface water body^, except in rain events equivalent to or greater than the 10% annual exceedance probability design storm
   3. the discharge^ must not contain concentrations of hazardous substances* that are toxic to aquatic ecosystems, or accumulate in soil.
5. For discharges^ of stormwater into surface water bodies^ the discharge^ must not cause any permanent reduction of the ability of the receiving water body^ or its bed^ to convey flood flows.
6. For discharges^ of stormwater into surface water bodies^ the discharge^ must not cause, after reasonable mixing*, any of the following effects^ in the receiving water body^:
   1. the production of conspicuous oil* or grease films, scums or foams, or floatable or suspended materials
   2. any conspicuous change in the colour or visual clarity of the receiving water^
   3. any emission of objectionable odour
   4. the rendering of fresh water^ unsuitable for consumption by farm animals
   5. toxicity to aquatic ecosystems.
7. The activity must not be to any historic heritage^ identified in any district plan^ or regional plan^.

1. There must be no discharge^ to any rare habitat*, threatened habitat*, at-risk habitat*, or reach of a river^ or its bed^ with a Schedule B Value of Natural State.

1. measures to control flooding and erosion
2. contaminant^ concentrations and loading rates
3. measures to avoid, remedy or mitigate adverse effects^ on groundwater quality
4. measures to manage the level of soil contamination
5. measures required to comply with s107(1) RMA
6. measures to assist with maintaining or achieving the Schedule E water quality targets* for the relevant Water Management Sub-zones*
7. management of odours arising from the stormwater discharge^
8. stormwater system maintenance* requirements
9. contingency requirements
10. monitoring and information requirements
11. duration of consent
12. review of consent conditions^
13. the matters in Policy 14-9.