Routine inspections shall be performed as required by this chapter.
At its discretion, the Department may authorize the use of private
inspections by the developer to conduct and document construction
and/or ongoing maintenance. Private inspections shall be performed
by individuals deemed qualified by the County. All private inspections
shall be certified by an engineer licensed in the state. Inspection
reports and certifications shall be submitted in writing or other
format as required by the Department. All costs and fees associated
with the use of private inspections shall be the responsibility of
the developer. The Department may collect fees associated with the
administration of the private inspections as established in the County's
Fee Schedule.
A.
The Director may establish minimum certification requirements for
qualified individuals or material testing laboratories performing
work in the County.
B.
Certifications by a professional engineer shall be provided documenting
that all structural stormwater management practices have been constructed
according to the approved plans. The professional engineer responsible
for the inspection of all stormwater management construction shall
certify the inspections through reports, test results, letters or
other documents as required by the County Engineer.
C.
The Director may require certifications for testing laboratories
and/or inspection personnel who work under the direct supervision
and responsible charge of a licensed professional.
A.
It shall be the responsibility of the developer or his representative
to notify the Department 48 hours prior to commencement of any work
and 48 hours prior to work at the specified stages of construction
for stormwater management systems. The Department has the right to
enter any project at any phase to monitor and/or inspect the construction
of stormwater management systems.
B.
The developer will make all necessary arrangements for providing
to the Department a certification, letter, or report documenting the
required stages of construction established in this chapter and all
test results from a professional engineer.
A.
Detailed written or electronic reports shall be prepared for each
inspection and shall be maintained by the County. The minimum information
required on each inspection report shall include:
(1)
The project name and number;
(2)
The person performing the inspection;
(3)
The person in responsible charge;
(4)
The date and time of the inspection;
(5)
An estimate of weather and temperature;
(6)
The contractor performing the work;
(7)
A description of the work being completed;
(8)
A list of materials used;
(9)
Size, length or other dimensions of any structure (pipes, weir walls,
steel, etc.);
(10)
Any testing performed on site (compaction, concrete, etc.);
(11)
Any directive or direction given;
(12)
Any corrective action needed;
(13)
Enforcement action taken; and
(14)
Any other information required by the construction engineer
or the County Engineer.
B.
Inspections for ESD planning techniques and practices. Regular inspections
shall be made and documented for each ESD planning technique and practice
at the stages of construction specified in the Design Manual. At a
minimum, all ESD and other nonstructural practices shall be inspected
upon completion of final grading, the establishment of permanent stabilization,
and before issuance of use and occupancy approval or final completion
acceptance.
C.
Structural BMPs. At a minimum, regular inspections shall be made
and documented at the following specified stages of construction:
(1)
Ponds: upon completion of excavation to subfoundation 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 on pipes;
(c)
Trenches for enclosed storm drainage facilities;
(d)
During placement of structural fill, concrete, and installation
of piping and catch basins;
(e)
During backfill of foundations and trenches;
(f)
During embankment construction; and
(g)
Upon completion of final grading and establishment of permanent
stabilization.
(2)
Wetlands: at the stages specified for pond construction in Subsection C(1), during and after wetland reservoir area planting, and during the second growing season to verify a vegetation survival rate of at least 50%.
(3)
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, prefilters and filters, inlets, outlets, orifices,
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 Subsection C(1) and during placement and backfill of underdrain systems.
(5)
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, prefilters and filters, inlets, outlets,
orifices, and flow distribution structures; and
(e)
Upon completion of final grading and establishment of permanent
stabilization.
A.
The Department may use the following enforcement actions:
(1)
A notice of violation shall be issued specifying the need for the
violation to be corrected if stormwater management plan noncompliance
is identified;
(2)
A stop-work order may be issued for the site by the County if a violation
persists;
(3)
Bonds or securities may be withheld or the case may be referred for
legal action if reasonable efforts to correct the violation have not
been undertaken; and
(4)
In addition to any other sanctions, a civil action or criminal prosecution
may be brought against any person in violation of the provisions of
this chapter.
B.
Any step in the enforcement process may be taken at any time, depending
on the severity of the violation.
A.
The developer or his representative shall assure that inspections
are made and approvals are given at the following specified stages
of construction:
(1)
Infiltration facilities, such as, but not limited to, infiltration
basins, infiltration trenches and dry wells:
(a)
Upon completion of pre-excavation and construction of temporary
sediment and erosion control measures;
(b)
Upon completion of excavation;
(c)
During the placement of filter fabric, observation well and
base aggregate material;
(d)
During the construction of concrete structures;
(e)
During the construction of cut-off trench and embankment;
(f)
During the placement of surface layer;
(g)
During the final excavation; and
(h)
Upon completion of final grading and establishment of permanent
vegetative stabilization.
(2)
Flow attenuation facilities, such as, but not limited to, open vegetated
swales, ditches and open channels:
(a)
Upon completion of pre-excavation and construction of temporary
sediment and erosion control measures;
(b)
During placement and backfill of underdrain systems for dry
wells;
(c)
During the construction of check dams, diaphragms, or weirs;
and
(d)
Upon completion of final grading and establishment of permanent
vegetative stabilization.
(3)
Ponds:
(a)
Upon completion of pre-excavation and construction of temporary
sediment and erosion control measures;
(b)
Upon completion of excavation to subfoundation and, when required,
installation of structural supports or reinforcement for structures,
including but not limited to:
(c)
During placement of structural fill, concrete, and installation
of piping and catch basins;
(d)
During backfill of foundations and trenches;
(e)
During embankment construction; and
(f)
Upon completion of final grading and establishment of permanent
stabilization.
(4)
Wetlands: at the stages specific for pond construction in Subsection A(3) of this section, during and after wetland reservoir area planting, and during the second growing season to verify a vegetation survival of at least 50%.
(5)
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, prefilters and filters, inlets, outlets,
orifices, and flow distribution structures; and
(e)
Upon completion of final grading and establishment of permanent
stabilization.
(6)
Storm drain system associated with the stormwater management system:
B.
The developer or his representative shall provide additional inspection,
testing and/or reports as field conditions may warrant as determined
by the Department.
If at any stage during construction the work does not conform to the approved plans and specifications, or to any instructions of the Department, a written notice to comply will be given to the developer. Such notice shall set forth the nature of corrections required and the time within which corrections will be made. Upon failure to comply within the time specified, the developer will be considered in violation of this chapter, in which the County shall impose penalties as establish in Article XIII.
A.
The developer shall be responsible for making all necessary arrangements
for the testing of materials required at specific stages of construction
of the stormwater management systems.
B.
The backfill material for core trench/cut-off trench and fill material
for embankments shall be compacted to not less than 95% of the maximum
dry density per ASTM D698/AASHTO T-99 with a moisture content within
± 2% of the optimum moisture content.
C.
Each layer of fill shall be compacted as necessary to obtain the
density and tested according to NRCS, the County Standards and Specifications
for Construction Manual, the approved plans or this chapter.
D.
Stormwater management ponds shall be constructed per the most recent
Maryland NRCS Standard and Specification Pond Code 378 and per the
approved plan and specifications.
E.
All concrete, soil and other material testing shall be performed
by qualified individuals. The results of all material testing shall
be clearly documented in a report and certified by a licensed professional.
All testing shall be performed per applicable ASTM (American Society
for Testing and Materials), AASHTO (Association of American State
Highway and Transportation Officials), MDSHA or County standards.
F.
The developer will notify the Department for final inspection after
the project is completed. Prior to the final inspections the following
information must be submitted:
(1)
Red-lined "as-built" plans and surveys by a licensed professional
at the same scale as the original plan showing all stormwater management
system improvements. The minimum information and formatting required
for the "as-built" plans shall be established in the Plan Preparation
Package.
(2)
Certification by the developer that all grading, drainage, erosion
control measures, and permanent facilities and vegetative measures
have been completed in conformance with the approved plans and specifications.
(3)
Certification from the construction engineer that all of the work
related to construction of the stormwater management has been inspected
and completed per the approved plans.
(4)
A final inspections report summarizing all testing and inspections
performed during the construction of all stormwater management systems.
After all stormwater management work has been completed and
approved and the required documents have been submitted and approved,
the Department will issue a certificate of final completion acceptance
to the developer.
Within 45 days of issuance, the Department will submit a notice
of construction completion to the District and enter all stormwater
management systems into the maintenance inspection inventory.
