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treatment plants, natural gas pipeline compressor stations, and crude oil <br /> pumping stations are exempt. Operators are encouraged to implement and <br /> maintain Best Management Practices to minimize erosion and control <br /> sediment during and after construction activities to help ensure protection of <br /> surface water quality during storm events. <br /> D. Road Maintenance: <br /> (1) The following road maintenance practices are exempt: pothole <br /> and square cut patching, overlaying existing asphalt or concrete <br /> pavement with asphalt or concrete without expanding the area <br /> of coverage, shoulder grading, reshaping/regarding drainage <br /> systems, crack sealing, resurfacing with in-kind material <br /> without expanding the road prism, and vegetation maintenance. <br /> (2) The following road maintenance practices are considered <br /> redevelopment, and therefore are not categorically exempt. The <br /> extent to which the minimum technical requirements apply is <br /> explained for each circumstance. <br /> (a) Removing and replacing a paved surface to base course <br /> or lower, or repairing the roadway base: If impervious <br /> surfaces are not expanded, Minimum Requirements #1- <br /> #5 apply. However, in most cases, only Minimum <br /> Requirement#2, Construction Stormwater Pollution <br /> Prevention, will be applicable. Where appropriate, <br /> project proponents are encouraged to look for <br /> opportunities to use permeable and porous pavements. <br /> (b) Extending the pavement edge without increasing the <br /> size of the road prism, or paving graveled shoulders: <br /> These are considered new impervious surfaces and are <br /> subject to the minimum requirements that are triggered <br /> when the thresholds identified for redevelopment <br /> projects are met. <br /> 25 <br />