HomeMy WebLinkAbout2012-06-19 O & M Plan Operation and Maintenance Plan
26 Main Street
North Andover, Massachusetts
1. The piped drainage system, including the catch basin sediment sump, precast concrete
galley system, drain manhole and the outlet flared end section with level spreader shall be
owned and operated by the Condominium Association. At the time of this writing, the
association has not been created so its identity is not yet known but shall be referred to as
the "Association".
2. The Association or its designated agent shall inspect the stormwater management system
4 times per year, including visual inspection of catch basin sediment sump, drain
manhole, precast galley system and terminal level spreader. The owner shall ensure that
no portion of the stormwater management system is damaged, blocked or otherwise in a
state that prevents its proper operation.
3. The Association shall ensure that accumulated silt and debris within the catch basin is
removed in a timely manner. The catch basin shall be cleaned when the sediment level is
within the two feet of the outlet pipe. The basin shall be cleaned at least annually in the
spring following winter sanding.
4. The Association shall inspect the drainage system components noted above after every
major storm for the first year and then every three months thereafter.
S. The association shall inspect the precast galley system after storms of 2 inches or more.
The system shall drain within 72 hours after the end of the storm. In the event that the
system is not draining, pump filtered water into the drain manhole and remove any debris
which is clogging the system.
6. The level spreader shall be mowed, typically when other lawn areas are mowed. Do not
aerate the soil in the level spreader area.
7. Illicit discharges are to be prohibited, The Association shall report any illicit discharges
once discovered to the North Andover Police and Health Departments.
8. The Association should have the parking area swept of sand and debris after the winter
sanding season.
Construction Period Pollution Prevention
and
Erosion and Sedimentation Control
Narrative
Erosion control measures will be implemented prior to the start of construction. A staked hay
bale and/or silt fence barrier will be installed as shown on the Site Plan. When Construction is
complete and all disturbed areas have been stabilized, a certificate of compliance shall be sought
from the North Andover Conservation Commission.
General Construction Period Operation and Maintenance Plan
During construction, the maintenance program shall consist of the following:
1. The erosion control barrier shall be visually inspected daily and shall be repaired or
replaced as necessary.
2. Sediment will be removed from the barriers when it has accumulated to a depth of six
inches.
3. All seeded or otherwise stabilized areas shall be inspected periodically to insure proper
germination and adequate coverage and shall be reseeded/restabilized as necessary.
4. Temporary sediment control structures or devices shall be inspected daily and prior to
forecast rainfall of 2 inches or more.
Responsible Party
The property Owner shall be responsible for ensuring that the site development contractor hired
for the work is continually in compliance with this Plan.
Construction Period Pollution Prevention Measures
The erosion control barrier shall be constructed prior to the start of construction. All disturbed
areas shall be mulched and seeded or otherwise permanently stabilized immediately upon
reaching finish grade.
Site Development Plan
See Site Plans revision dated April 19, 2012, and prepared by Andover Consultants, Inc. for
development details.
Construction Sequencing Plan
Major activities will generally proceed as follows:
1. Install perimeter erosion control barrier(staked hay bales).
2. Demolish existing structures and existing pavement and remove off site in accordance
with all local, state and federal laws and regulations,
3. Clear and grub areas within the limit of work (inside erosion barrier).
4. Prepare building site for construction.
5. Construct subsurface utilities connecting to public utilities in Main St. including
water, sewer, electric and gas.
6. Install parking lot drainage system including level spreader.
7. Prepare sub-grade and install base material for parking areas to grade.
S. Install binder course of pavement for parking lot.
9. Final grade, seed and mulch disturbed non-paved areas.
10. Complete building construction.
11. Install finish course of pavement.
12. Clean project area
13, Once site is stabilized obtain a certificate of compliance from the Conservation
Commission and remove perimeter erosion control stakes and properly dispose of in
accordance with applicable laws and regulations.
Sequencing of'Erosion and Sedimentation Con1i•olr
Erosion and sedimentation controls will be installed prior to any disturbance at the site. An
ongoing inspection and maintenance schedule will be followed and additional measures will be
added as necessary.
.Inspection Schedule
During construction the inspection schedule shall consist of the following;
1. The erosion barrier shall be visually inspected daily and shall be repaired or replaced as
necessary.
2. All seeded areas shall be inspected periodically to insure proper germination and
adequate coverage and shall be reseeded as necessary. Any wash outs shall be promptly
repaired, reseeded and mulched
3. Maintain existing driveway by sweeping as needed to prevent tracking of soil onto
existing parking lot, remove any soil tracked onto existing pavement,
Inspection and Maintenance Log Fof•rn
Inspection and Maintenance Report
26 Main Street
North Andover, Massachusetts
DEP File No. 242-1544
Catch basin Condition Action Taken
Infiltration galleys
Pipe flare end
Level spreader
Drain manhole
Signed Date