(A) Regular inspections shall be made and documented at each of the following stages of construction:
(1) Environmental site design (in accordance with the Design Manual and the approved final SWM plans);
(2) For ponds:
(a) Upon completion of excavation to sub-foundation, and during installation of structural supports or reinforcement for structures, including but not limited to:
(i) Core trenches for structural embankments;
(ii) Inlet and outlet structures, anti-seep collars or diaphragms, and watertight connectors on pipes; and
(iii) 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.
(3) Wetlands - At the stages specified for pond construction in § 1-15.2-8.2(A)(2) of this chapter, during and after wetland reservoir area planting, and during the second growing season to verify a vegetation survival rate of at least 50 percent.
(4) For infiltration trenches:
(a) During excavation to subgrade;
(b) During placement and backfill of under drain 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.
(5) For infiltration basins - At the stages specified for pond construction in § 1-15.2-8.2(A)(2) of this chapter and during placement and backfill of under drain systems.
(6) For filtering systems:
(a) During excavation to subgrade;
(b) During placement and backfill of under drain 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.
(7) For open channel systems:
(a) During excavation to subgrade;
(b) During placement and backfill of under drain 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) After construction is complete, "as-built" plan certification shall be prepared by a registered professional, certifying that ESD planning techniques and practices, and structural BMPs and conveyance systems comply with the specifications contained in the approved plans. "As-built" certification shall include a set of drawings comparing the approved final SWM plan with what was constructed. The Division may require additional information and certifications.
(C) Within 45 days of construction completion, the Division shall submit notice of construction completion to the administration on a form supplied by the administration for each structural stormwater management practice. The type, number, total drainage area, and total impervious area treated by all ESD planning 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 local SCD.
(Ord. 10-09-544, 5-20-2010; Ord. 14-23-678, 11-13-2014)