ECM Drawing Guidelines

Area 1

0.24

0.12

62.00

33.00

30.00

63.00

10.00

Ground Level

To be indicated in cross and longitudinal section showing excavation.

In Singapore Height Datum

On site plan: Indicated as spot levels.

On cross section: E.g.

Silt Fence (xxx mm)

Silt fences minimum 600mm in height.

On site plan:

Green –DWG colour code 3 (RGB 0,255,0)

Toe In (xxx mm)

To be indicated in cross section drawing. Toe in to be minimum 150mm.

On cross section:

Exposed Area (xxx ha)

Area within site that is bare/ erodible surfaces

No hatching.

AutoCadFill = 0

Unexposed Area (xxx ha)

Area within site that is paved/ covered.

Concrete hatching/ Grey solid fill.

Cut-Off Drain (type/width)

Type/width and flow direction of drain to be indicated.

For proposed precast channel drains Indicate type (Type e.g. C7)

For proposedU-drains –Indicate width

More than one type of drain may be used on site. To annotate clearly the drain type on site.

On plan/ longitudinal section:

Blue -DWG colour code # 5 (RGB 0,0,255)

Brown –DWG Colour Code #34 (RGB 129,64,0)

Cut-Off Drain (type/width)

Type/width to be indicated.

For proposed precast channel drains Indicate type (Type e.g. C7)

For proposedU-drains –Indicate width

On Cross-section:

Blue -DWG colour code # 5 (RGB 0,0,255)

Hump

Division hump separating the exposed and unexposed area within site.

On Plan:

Orange –DWG Colour code # 30 (RG B 255,127,0)

Hump at site entrance

Raised hump/berm separating exposed and unexposed area at site entrance.

On Plan:

Orange –DWG Colour code # 30 (RG B 255,127,0)

Site Boundary

Plan view of Site Boundary

Red –DWG Colour code # 1 (RG B 255,0,0)

Hoarding with sealed bottom

Plan view of Hoarding along site boundary. Indicate as same line as site boundary

Red –DWG Colour code # 1 (RG B 255,0,0)

Plan view of Hoarding with sealed bottom, if separate from site boundary.

e.g. A&A Works in big factory compound

Purple –DWG colour Code #190 (RGB 127,0,255)

Cross section ofHoarding with sealed bottom

Red –DWG Colour code # 1 (RG B 255,0,0)

OR Purple –AutoCadCode #190

(RGB 127,0,255)

Cut off Drain Invert Level

Level taken from the bottom of the inside of the drain.

In Singapore Height Datum

INV 10.34m SHD

Summit Point

Highest point along the perimeter cut off drain.

Level taken from the bottom of the inside of the drain.

Red –DWG Colour code # 1 (RG B 255,0,0)

Brown –DWG Colour Code #34 (RGB 129,64,0)

Silt trap

Shall be provided along the perimeter cut-off drain.

On Plan:

Public drain

To show the discharge from treatment plant to public drain in cross section drawing.

Blue -DWG colour code # 5 (RGB 0,0,255)

Holding/Storage Pond(xx m³)

Storage pond with volume indicated.

To be located underground.

To indicate the max depth of storage pond in the cross-section drawing. Show the internal dimension

If there are multiple storage ponds, to indicate as “Storage pond 1, (xx m³)”; “Storage pond 2, (yym³) etc”.

Magenta –DWG colour code #6 ( RGB 255,0,255)

Holding/Storage tank*(xx m³)

Holding Tank with volume indicated.

To be located above ground.

To show the internal dimension.

If there are multiple Holding tank, to indicate as “Holding tank 1, (xx m³)”; “Holding tank 2, (yym³) etc”

(*Only for MRT Tunnel projects, sewer trench or basement)

Magenta –DWG colour code #6 ( RGB 255,0,255)

The standard symbol for holding pond & treatment plant shall be used regardless of actual shape of holding pond/treatment on site.

Treatment Plant (xx m³/hr)

Treatment plant with capacity indicated.

If there are multiple treatment plants, to indicate as “Treatment Plant 1 (xx m³/hr)”; “Treatment Plant 2 (yy m³/hr) etc”

On Plan: Cyan –DWG colour code #4 ( RGB 0,255,255)

On Cross section:

Discharge outlet with CCTV & TSS Monitoring system

Site more than 0.2ha or at sensitive area (e.g. reservoir area, next to waterway)

On Plan:

Discharge Point

Discharge point of treated water into public drains.

Discharge point of internal drains into public drains. Whenever possible, shall be via gravity.

On Plan:

Red –DWG Colour code # 1 (RG B 255,0,0)

Pump

Pumps to transfer water from the storage pond into the treatment plant.

Describe Pump type. (e.g. submersible pump)

On Plan:

Sand Bags (yylayers, xx mm)

Sand bags with number of layers and total height indicated.

Sand bags are to be a minimum two layers at a maximum height of 300mm.

Brown –DWG Colour Code #34 (RGB 129,64,0)

Exposed Area (xx Ha)

Exposed area To be indicated in cross and longitudinal section showing excavations.

Unexposed Area (xx Ha)

Unexposed area

Grey –DWG coourcode #9

( RGB 128,128,128)

Ground

When displaying a cross section/longitudinal section showing underground element, the ground level shall be hatched clearly. (minimal hatching)

Soil hatching

Paved Surfaces

Access path/ Road/ Site office areas

Not representing hardcore.

Concrete hatching

Flow of silty runoff

SILTY: Brown Solid Arrow

Brown –DWG Colour Code #34 (RGB 129,64,0)

Flow of clean runoff

Site plan, cross-section & longitudinal sections

Clearly differentiate if discharge is silty or clean.

Clean: Blue Solid Arrow.

Blue -DWG colour code # 5 (RGB 0,0,255)

Flow of silty water from storage pond into treatment plant.

Site plan, cross section, longitudinal sections.

Red solid Arrow

Red –DWG Colour code # 1 (RG B 255,0,0)

Discharge point into public drain.

Site Plan

Clean: Blue solid Double Arrow Head

Blue -DWG colour code # 5 (RGB 0,0,255)