HomeMy WebLinkAboutStorm Water Quality BMP Operations & Maintenance ManualTLF, INC
.
th
3901 West 86. Street, Suite 200
Indianapolis, IN 46268
Phone (317) 334-1500; Fax (317) 334-1552
Storm Water Quality BMP
Operations & Maintenance Manual
For
Carmel High School Building Corporation
Fitness and Weight
Room Center
TLF Project 2008-515
th
December 14, 2011
Prepared by: TLF, Inc.
Carmel High School Building Corporation
Fitness and Weight Room Center
Post-Construction Storm Water Quality BMP O&M Manual
TABLE OF CONTENTS
A.Project Overview
B.BMP Maintenance and Inspection Summary
C.BMP Maintenance Guidelines
PROJECT OVERVIEW
The project improvements consist of the modification of existing parking area to building and
green space at the north edge of the existing school building. The proposed site improvements
associated with this project will reduce the impervious (pavement) area by 1,000 sf. The
reduction of paved surface and installation of the Rain Garden work taken collectively serve to
reduce runoff, increase percolation and improve stormwater water quality for the site.
Per the City of Carmel Stormwater Ordinance, the Rain Garden was sized to detain 1,196 cf of
runoff. The installation of the pea gravel and sand trench underdrain system allow staging the
small basin to a max depth of 18”.
BMP MAINTENANCE AND INSPECTON SUMMARY
Best Management Practices (BMPs) are used to filter stormwater and remove harmful
sediments, nutrients, and contaminants prior to reaching creeks, streams, and rivers. In
addition, regular inspections and maintenance of the site aids in the removal of trash,
litter and debris.
Rain Garden BMP’s are natural BMP’s that use ponding, filtration and natural processes
performed in soils and by vegetation to improve stormwater quality. The BMP should be
monitored and periodically inspected to remove trash and debris that could inhibit the
health of grass and other vegetation.
The BMP unit should be inspected upon completion of construction and cleaned of any
sediment and/or construction debris.
The Rain Garden BMP should be inspected on a yearly basis for grass and plant health.
Plants and mulch beds shall be inspected and maintained allowing for positive drainage
and filtration. The aged hardwood mulch layer should also be inspected and when
necessary replaced.
The owner is required to keep record of the inspections and maintenance activities
associated with the BMP.
After construction the Owner is responsible for inspecting and maintaining the BMP.
TLF, Inc. Rev. 1
Project No. 2008-515 Date: 14-Dec-2011
Page: 1 of 3
Page 1
Carmel High School Building Corporation
Fitness and Weight Room Center
Post-Construction Storm Water Quality BMP O&M Manual
RAIN GARDEN BMP MAINTENANCE GUIDELINES
Bioretention/Rain Garden Maintenance Guidelines
ActivitySchedule
1.Water vegetation at the end of each day for
First year after installation or
two weeks after planting is completed.
as needed during drought
2.Water vegetation regularly to ensure
conditions
successful establishment.
1.Remulch void areas.
2.Treat diseased trees and shrubs.
As needed
3.Keep overflow free and clear of leaves.
1.Inspect soil and repair eroded areas.
2.Remove litter and debris.
Monthly
3.Clear leaves and debris from overflow.
1.Inspect trees and shrubs to evaluate health,
replace if necessary.
2.Inspect underdrain cleanout.
3.Verify drain out time of system. Drain out
time should not exceed 48 hours. When Twice Per Year
drain out exceeds 48 hours the outlet should
be checked for obstruction and/or the mulch
and soil need replaced to restore infiltration.
1.Add additional mulch.
2.Inspect for sediment buildup, erosion,
Annually
vegetative conditions, etc.
1.Maintain records of all inspections and
Ongoing
maintenance activity.
TLF, Inc. Rev. 1
Project No. 2008-515 Date: 14-Dec-2011
Page: 2 of 3
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