Marlborough Sounds Resource Management Plan c) All land disturbance sites are to be stable when subject to a storm event of return frequency probability of 10% or less. 32.1.3.1.2 Exception Except any land disturbance activity that does not comply with the above conditions or is in an area identified as a hazard area that is required for the purposes of constructing or providing access to any structure requiring a building permit under the Building Act 1991, shall not be a Permitted Activity, with no restriction on the exercise of Council’s discretion. 32.1.3.2 Excavation and Filling 32.1.3.2.1 Conditions a) The maximum volume for either excavation or filling shall not exceed 20m³ in any continuous ten year period; b) The gradient of any side cut excavation must not exceed an average of 9.5 (1:6) and must not exceed 11.3 (1:5) along any length of more than 20 metres; c) Stormwater controls, watertable cut-offs, and culverts are to be installed to ensure that erosion does not occur on the inside edge of the cut. No culvert size less than 300mm may be used to drain any side-cut excavation; d) Batters and side castings are to be established by appropriate measures such as seeding, compacting, drainage and/or other methods of revegetation; e) Run-off from watertables or surfaces of side-cut excavations is to be directed to stable land areas; and f) Except for direct approaches to bridges, crossings and fords; maintenance of rail and public roads; and trenching for cable laying, no excavation or filling must take place within riparian management zones as specified in the schedule of water bodies and Table 1 in Appendix I and as mapped in Ecology Maps in Volume Three, or in a manner or location where the General Conditions for Land Disturbance above can not be complied with. 32.1.3.2.2 Fill Content In addition to compliance with the conditions relating to the volume of fill material any filling of land or depressions is a Non-Complying Activity where the fill contains: • Putrecible, inflammable or hazardous components; • Material other than rubble, ballast, stones, soily material and demolition material; or • Vegetation which is not incidental to the clearing of sites, and which comprises more than 5% of the fill material, by volume. 32.1.3.2.3 Exemptions The following activities are exempt from control on the volume of material: • Any works involving the repair or replacement of any utilities; and 32 - 6