CHECKLIST JPIF DBKL – STORMWATER MANAGEMENT

JPIF -SWM 01 : ONSITE STORMWATER DETENTION (OSD) – Below Ground

a. ONSITE STORMWATER DETENTION - Tank Design

i Setback 2.30 meter / 7ft 6in from the boundary line. Building Act

ii Made of reinforced concrete structure (with water proofing insulation)MASMA 19.7.1 (a)or material approved by manufacturer for OSD purpose.

iii Minimum freeboard 300mm (from top water level at ARI 50 years).

iv Inlet pipe entry above ARI 50 years top water level

v Outlet pipe size bigger than the Inlet pipe at ARI 50 years top water level

vi Ventilation / maintenance manhole minimum size 750mmx750mm at 30

meter interval MASMA 19.7.1 (e)

vii Trash Screen covers both primary & secondary outlet MASMA 19.8.6

viii Slope gradient minimum 2% (1:50) and maximum 10% (1:10) MASMA 19.7.1 (d)

xi Primary pipe outlet at bottom-most point of the tank MASMA 3.5.3.7

xii Invert -level at the primary outlet pipe h igher than receiving drain invert level

xiii Pump to be install if (xii) not comply.

xiv Step ladder for tank more than 1.2 meter depth MASMA 19.7.1 (g)

b. ONSITE STORMWATER DETENTION – Engineering Drawings

i Location on the Site Plan.

ii Indicate 100% flow from the perimeter drain & RWDP into the OSD.

iii Show plan, cross-section and long-section of the OSD.

iv Show the receiving drain on the OSD long-section drawing.

v Show engineering calculation from Hydraulic Report on Table A and B

Prepared by Checking by

Confirmed by (.................)

(.................) (..................)

AREA OF DEVELOPMENT PERVIOUS SURFACE AREA IMPERVIOUS SURFACE AREAAcres Sq. Meter Before

DevelopmentAfter

DevelopmentBefore

DevelopmentAfter Development

Time of Concentration

Flow before Development

Flow after Development

Permissible Site Discharge

Site Storage Requirement

Primary Outlet Size

Secondary Outlet Size

Tcs Tc Q pre Q post PSD SSR P outlet S outlet

TABLE A

TABLE B

COLOUR CODE :

1. Drainage Flow : Blue

2. OSD : Yellow

3. Boundary Line : Dashed outline Red

JPIF –SWM 02 : RAINWATER HARVESTING (RWH)

a. RAINWATER HARVESTING - Tank Design

i Rainwater MUST collected from the roof catchment.

ii Channel to the RHW Tank / Cistern by rain water down pipe (RWDP).

iii Filtering System.

iv First Flush System (flow from RWDP)

v Underground First Flush System (flow from Perimeter Drain)

vi Rain Water Harvesting Tank / Cistern (3m3 – Bungalow / Semi Detach or 1m3 – Terrance House)For commercial, apartments and other type of development – 30% of the SSR volume.

vii Conveyance system to usage point

viii Type of Usage point (Garden Tap / Toilet etc)

ix Overflow pipe (Into OSD tank : Commercial / Apartment. Into receiving drain : Residential House)

x Scouring pipe and mosquito protection netting.

xi Pipe system (anti clog / inside cage)

b. RAINWATER HARVESTING – Engineering Drawings

i Location on the Site / Floor Plan.

ii Indicate 100% flow from the RWDP into the RWH Tank.

iii Show plan, cross-section and long-section of the RHW Tank.

iv Cross-section against the house or building being construct.

v Schematic Drawing for the RWH Tank.

vi Show RWH engineering data on Table C

NOTE:FIRST FLUSH1. Rooftops of 100m2 or smaller : 25 to 50 liters2. Rooftops of 100m2 or larger : 50 liters per 100m23. Rooftops or surface catchments of 4356m2 or larger : 2500 liters

WORDING TO BE INCLUDE IN ALL STORM WATER MANAGEMENT PLAN “ SAYA MENGESAHKAN SISTEM PENUAIAN AIR HUJAN YANG DI SEDIAKAN DAN AKAN DIBINA MENGIKUT GARIS PANDUAN KEMENTERIAN PERUMAHAN DAN KERAJAAN TEMPATAN DAN JABATAN PENGAIRAN DAN SALIRAN (JPS)”

Prepared by Checking by Confirmed by

(................) (..............) (.............)

ROOF CATCHMENT AREA FILTER CAPACITY FIRST FLUSH CAPACITY PUMP

Total Catchment

Area Flow into RWH Tank

No Capacity No Capacity CapacityTABLE C

COLOUR CODE :

1. Drainage Flow : Blue

2. RWH : Yellow

3. Boundary Line : Dashed outline Red

JPIF - SWM 03: COMBINATION OF ONSITE STORMWATER DETENTION (OSD) AND RAINWATER HARVESTING (RWH)

a. SEPARATE TANK - Tank Design

- Refer to JPIF01 (a)-OSD and JPIF02 (a)-RWH for Tank Design.- Refer to JPIF01 (b)-OSD and JPIF02 (b)-RWH for Engineering Drawing.

b. COMBINE TANK - Tank Design

- Refer to JPIF01 (a)-OSD and JPIF02 (a)-RWH for Tank Design.- Refer to JPIF01 (b)-OSD and JPIF02 (b)-RWH for Engineering Drawing.

EXTRA CHECKLIST – Combination of RWH & OSD using common TANK

i Separate compartment with 30% - RWH and 70% - OSD.

ii Primary & Secondary Outlet located at the OSD compartment.

iii RWDP must flow into RWH compartment & Perimeter Drain flow in OSD compartment.

iv Inlet Pipe (RWDP) above top height of compartment separator .

vi Secondary Pipe outlet below top height of compartment separator.

vii Manhole (2 no) located above the Inlet Pipe and Outlet Pipe.

viii Include Table A, Table B & Table C in Engineering Drawing.

Prepared by Checking by Confirmed by

(................) (..............) (.............)

AREA OF DEVELOPMENT PERVIOUS SURFACE AREA IMPERVIOUS SURFACE AREAAcres Sq. Meter Before

DevelopmentAfter Development Before

DevelopmentAfter Development

Time of Concentration

Flow before Development

Flow after Development

Permissible Site Discharge

Site Storage Requirement

Primary Outlet

Secondary Outlet

Tcs Tc Q pre Q post PSD SSR P outlet S outlet

ROOF CATCHMENT AREA FILTER CAPACITY FIRST FLUSH CAPACITY PUMP

Total Catchment

Area Flow into RWH

Tank

No Capacity No Capacity Capacity

TABLE

TABLE B

TABLE C

COLOUR CODE :

1. Drainage Flow : Blue

2. OSD & RWH : Yellow

3. Boundary Line : Dashed outline Red