TATACARA PERLAKSANAAN KERJA SISTEM PENGURUSAN AIR HUJAN Rainwater Harvesting System Method Statement
CADANGAN MEROBOH DAN MEMBINA SEMULA SEBUAH RUMAH BANGLO 2 TINGKAT BERSERTA 1 TINGKAT BASEMEN DAN 1 KOLAM RENANG SEDIADA KEPADA SEBUAH BANGLO 3 TINGKAT BERSERTA 3 TINGKAT BASEMEN DI ATAS LOT 36649, NO. 23, JALAN SEMANTAN 2, TAMAN DUTA 3, DAMANSARA HEIGHT, 50490 WILAYAH PERSEKUTUAN, KUALA LUMPUR.
Y.M. CHE’ ENGKU DATO’ SRI PUAN SRI MAHIRAH BINTI ABDULLAH
33 Jalan Semantan 2, Damansara Heights, 50490 Kuala Lumpur. Consulting Engineers: KESHMEN CONSULT SDN. BHD. 12A-3 (3rd Floor), Jalan PJS 11/28, Bandar Sunway, 46150 Petaling Jaya, Selangor Darul Ehsan. Tel: 03-5632 3750 Fax: 03-5634 0356 E-mail: [email protected]
SAYA MENGESAHKAN SISTEM PENGURUSAN AIR HUJAN YANG AKAN DIBINA DAN DISEDIAKAN ADALAH MENGIKUT GARIS PANDUAN KEMENTERIAN PERUMAHAN DAN KERAJAAN TEMPATAN DAN JABATAN PENGAIRAN DAN SALIRAN.
LAND AND PROJECT INFORMATION 1.1
The total land cover by the proposed site is 0.51 acre (0.21 ha).
The existing terrain of the site is at RL72.5m at the northwest corner to RL57.8m at the southeast corner of the lot. The site is drained by existing internal drains within the compound, discharging to existing public drains via the adjacent lot bordering the southern lot boundary. The existing internal drains will be partially repurposed for this new development.
The access to the proposed site is via Jalan Semantan 2 at the site’s Northern Boundary. General site location in the immediate vicinity is shown on the key plan (Figure 1) and location plan (Figure 2).
The surrounding areas of the lot are developed.
The proposed development will consist of 3 levels above ground and 3 levels below ground.
METHOD STATEMENT 2.1
Rainwater from flat roof shall be channeled to the Rainwater Harvesting Tank. Water storage in Rainwater Harvesting Tank shall then use for landscaping and washing use.
Rainwater harvesting system include rainwater pre-filters, storage tanks, distribution pumps, controls, and water treatment.
Rainwater harvesting system consisting of manufactured components integrated into automated system. The system shall collect rainwater from the roof and convey rainwater through roof drains, downspouts and conveyance piping, self-cleaning, gravity fed pre-filters. Filtered rainwater will travel through the pre-filter and into a rainwater storage tank. Water will be drawn out of the storage tank and pumped through a packaged pumping system to the irrigation/plumbing system. The pumping system will be design to provide water at the desired design point on an on-demand basis.
Design Requirements: Filter, store, and distribute harvested rainwater.
Water Disinfection Methods: May include sediment filtration, ultraviolet treatment, chlorine injection, carbon filtration, or a combination thereof.
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Install system components in accordance with manufacturer's instructions and approved Shop Drawings.
Arrange equipment so that components requiring removal or maintenance are readily accessible without disturbing other components. Arrange for clear passage between components.
Connect to utility supplies and equipment.
Ground components in accordance with component manufacturer's instructions.
Install prefilters at time storage tanks are installed.
Do not bury Graf filters deeper than manufacturer's recommended depth unless a vault is installed.
FIELD QUALITY CONTROL 4.1
Installation oversight and technical support shall be provided.
Terminate and test control system wiring and operation of electrical components.
Demonstrate proper pump and controls operation.
Make adjustments to meet user-defined system performance.
Review operation and maintenance procedures with Owner's representative.
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