At a minimum, regular inspections shall be made and documented at the following specific stages of construction.
(A) Ponds.
(1) Upon completion of excavation to sub-foundation and, when required, installation of structural supports or reinforcement for structures, including but not limited to:
(a) Core trenches for structural embankments;
(b) Inlet and outlet structures, anti-seep collars or diaphragms, and watertight connectors; and
(c) Trenches for enclosed storm drainage facilities.
(2) During placement of structural fill, concrete, and installation of piping and catch basins;
(3) During backfill of foundations and trenches;
(4) During embankment construction; and
(5) Upon completion of final grading, establishment of permanent stabilization.
(B) Wetlands. At all stages specified for pond construction, during and after wetlands reservoir planting, and during the second growing season to verify a vegetation survival rate of at least 50%.
(C) Infiltration trenches.
(1) During excavation to subgrade;
(2) During placement and backfill of under drainage systems and observation wells;
(3) During placement of geotextiles and all filter media;
(4) During construction of appurtenant conveyance systems, such as diversion structures, pre-filters and filters, inlets, outlets, and flow distribution structures; and
(5) Upon completion of final grading and establishment of permanent stabilization.
(D) Infiltration basins. At all stages specified for pond construction, during placement of and backfill of under drainage system.
(E) Filtering systems.
(1) During excavation to subgrade;
(2) During placement and backfill of under drainage systems;
(3) During placement of geotextiles and all filter media;
(4) During construction of appurtenant conveyance systems such as diversion structures, pre-filters, and filters, inlets, outlets, and flow distribution structures; and
(5) Upon completion of final grading and establishment of permanent stabilization.
(G) Open channel systems.
(1) During excavation to subgrade;
(2) During placement and backfill of under drainage systems for dry swales;
(3) During installation of diaphragms, check dams, or weirs; and
(4) Upon completion of final grading and establishment of permanent stabilization.
(H) ESD practices. At the stage of construction specified in the design manual for each ESD planning technique and practice, and at a minimum upon completion of final grading, the establishment of permanent stabilization, and before issuance of use and occupancy approval.
(Ord. 08-2010, passed 11-1-2010)