(A) At a minimum regular inspections shall be made and documented at the following specified stages of construction:
(1) For ponds:
(a) Upon completion of excavation to sub-foundation and when required, installation of structural supports or reinforcement for structures, including but not limited to:
1. Core trenches for structural embankments;
2. Inlet and outlet structures, anti-seep collars or diaphragms; and watertight connectors on pipes; and
3. Trenches for enclosed storm drainage facilities;
(b) During placement of structural fill, concrete, and installation of piping and catch basins;
(c) During backfill of foundations and trenches;
(d) During embankment construction; and
(e) Upon completion of final grading and establishment of permanent stabilization.
(2) Wetlands: at the stages specified for pond construction in division (A)(1) of this section, during and after wetland reservoir area planting, and during the second growing season to verify a vegetation survival rate of at least 50%.
(3) For infiltration trenches:
(a) During excavation to subgrade;
(b) During placement and backfill of underdrain systems and observation wells;
(c) During placement of geotextiles and all filter media;
(d) During construction of appurtenant conveyance systems such as diversion structures, pre-filters and filters, inlets, outlets, and flow distribution structures; and
(e) Upon completion of final grading and establishment of permanent stabilization.
(4) For infiltration basins: at the stages specified for pond construction in division (A)(1) of this section and during placement and backfill of underdrain systems.
(5) For filtering systems:
(a) During excavation to subgrade;
(b) During placement and backfill of underdrain systems;
(c) During placement of geotextiles and all filter media;
(d) During construction of appurtenant conveyance systems such as flow diversion structures, pre-filters and filters, inlets, outlets, orifices, and flow distribution structures; and
(e) Upon completion of final grading and establishment of permanent stabilization.
(6) For open channel systems:
(a) During excavation to subgrade;
(b) During placement and backfill of underdrain systems for dry swales;
(c) During installation of diaphragms, check dams, or weirs; and
(d) Upon completion of final grading and establishment of permanent stabilization.
(B) The Stormwater Management Office may, for enforcement purposes, use any 1 or a combination of the following actions:
(1) A notice of violation shall be issued specifying the need for a violation to be corrected if stormwater management plan noncompliance is identified;
(2) A stop work order shall be issued for the site by the Stormwater Management Office if a violation persists;
(3) Claims may be made against the securities posted or the case may be referred for legal action if reasonable efforts to correct the violation have not been undertaken; or
(4) In addition to any other sanctions, a civil action or criminal prosecution may be brought against any person in violation of the Stormwater Management Subtitle, the Design Manual, or this chapter.
(C) Any step in the enforcement process may be taken at any time, depending on the severity of the violation.
(D) Once construction is complete, as-built plan certification shall be submitted by either a professional engineer or professional land surveyor licensed in the state to ensure that ESD planning techniques, treatment practices, and structural stormwater management measures and conveyance systems comply with the specifications contained in the approved plans. At a minimum, as-built certification shall include a set of drawings comparing the approved stormwater management plan with the constructed. The Stormwater Management Office may require additional information.
(E) The Stormwater Management Office shall submit notice of construction to the Administration on a form supplied by the Administration for each structural stormwater management practice within 45 days of construction completion. The type, number, total drainage area, and total impervious area treated by all ESD techniques and practices shall be reported to the Administration on a site by site basis. If BMPs requiring SCD approval are constructed, notice of construction completion shall also be submitted to the appropriate SCD.
(Res. 2010-8, passed 6-15-2010)