6
INST
ALLA
TION MANUAL
Modular Rain Garden
Place safety barriers, markings and signs
as required by site safety plan.
Locate all underground utilities before
beginning demolition and excavation,
and resolve any conflicts with site plans.
Remove existing pavements, plant
material or structures from the area
to be excavated. Grade site to plan
elevations. Stabilize graded area to
minimize sedimentation during con-
struction. Place erosion control devices,
as required to prevent sedimentation of
the system.
Excavate trench to the depths and
shape called for in the plans, minimizing
compaction of site soils in the trench as
much as possible.
[recommendation regarding amount
of over excavation and illustration
- Rendering of plan view of
recommended trench configuration].
If your system will include an under-
drain, excavate for under-drain system
and install pipe to connect into local
stormwater drainage system per
specifications. Backfill as specified.
Take care not to damage the under-
drain during placement of aggregate
fills. Sizing and installation for the
under-drain pipe system should be
specified in the project plans.
Prior to covering the under-drain
system, the inspector will need to
inspect the under-drain installation, its
connections, and any filter fabrics that
are used.
ST
AGE 1
Site Preparation, Demolition and Excavation
Place safety barriers
Site preparation and demolition
Excavation
rendering of excavation
