An earth control measures (ECM) submission is the plan a Qualified Erosion Control Professional (QECP) prepares and endorses, and PUB approves, before earthworks begin on a Singapore construction site. It shows how silty runoff will be contained and treated before it reaches public drains. Developers and contractors who start earthworks without an approved plan carry both regulatory and programme risk. This guide sets out who files, what the submission contains, how review works and what the site must do once approval is in hand.
TL;DR
- Contractors must engage a QECP to design an ECM plan, and PUB’s approval is needed before earthworks commence (PUB).
- The submission covers project information, construction sequence, design calculations and ECM drawings, supported by a soil investigation report and endorsed by the QECP (PUB submission guidelines).
- PUB’s typical response time for works requiring ECM is 14 working days, and the applicant is the QECP (PUB service commitment).
- Approval is the start of the obligation. Sites must implement, audit, monitor and maintain the measures until works are complete.
- Non-compliance can lead to penalties, stop-work orders and prosecution, with fines of up to S$50,000 under the Sewerage and Drainage Act.
Table of Contents
- What earth control measures are and why PUB requires a submission
- Who is responsible for the submission
- When the submission is required and when self-declaration applies
- What the ECM submission must contain
- How to submit and what happens in review
- Implementing, monitoring and maintaining the approved plan
- Consequences of non-compliance
- Coordinating the ECM submission with other approvals
- Our perspective
- How AEC Technical Advisory supports your submission
- FAQ
- Sources
What earth control measures are and why PUB requires a submission
Earth control measures prevent silt washed from exposed earth surfaces and construction sites from accumulating in waterways and reducing the effectiveness of stormwater flow, as PUB explains on its ECM requirements page. In practice, this means silty water from a site must be contained and treated before it leaves the boundary. Silt that reaches drains, canals and reservoirs reduces drainage capacity and raises flood risk, which is the reason PUB requires ECM at construction sites.
The requirement sits within the Code of Practice on Surface Water Drainage, which dictates that contractors must contain and treat silty rainwater runoff at construction sites (PUB sample specifications). The submission is how the project demonstrates, on paper and before work starts, that it can meet that standard.
For project teams, the ECM submission is one of several approvals that gate site works. It sits alongside excavation, piling and retaining structure submissions, and the sequencing matters. Our overview of the role of PUB in construction shows where PUB’s requirements meet the rest of the authority approvals.
Who is responsible for the submission
Four roles recur in every ECM submission.
| Role | Responsibility |
|---|---|
| Developer / site owner | Owns the site and must ensure activities do not cause silty discharge to waterways. Should engage a QECP and reflect ECM costs in the tender. |
| Contractor | Ensures no silty discharge at the construction site, implements the approved ECM and carries out a joint audit with the QECP. |
| QECP | A professional engineer engaged to design the ECM plan and supervise its implementation. Acts as the applicant to PUB. |
| ECMO | Earth Control Measures Officer who looks after day-to-day ECM operation on site. |
These duties are drawn from PUB’s ECM guidelines for stakeholders. The submission itself is made by the QECP, per PUB’s service commitment, so the choice of QECP is the first real decision in the process.
For sites under the Land Transport Authority’s environmental protection guidelines, there is an additional staffing rule: construction sites spanning more than 0.5 hectares must have a full-time staff member with an ECMO qualification (LTA). Engage the ECMO early. A site that has an approved plan but nobody qualified to run it day to day has a gap that inspectors will find.
Why the developer cannot leave it to the contractor
PUB’s stakeholder guidelines place duties on developers as well as contractors. Developers own the site and are expected to ensure that all activities there do not cause silty discharge. They are also expected to incorporate detailed ECM design specifications and costing in the tender. The ECM plan is the basis on which contractors price ECM, and under PUB’s sample specifications they are deemed to have included those costs in the total contract price (PUB sample specifications). A developer that obtains the ECM design at tender stage avoids variation disputes later.
When the submission is required and when self-declaration applies
The general rule is simple. Contractors must engage a QECP to design a comprehensive ECM plan for PUB’s approval before earthworks commence (PUB). PUB’s guidelines for stakeholders repeat the sequence: obtain ECM approval from PUB, then work with the QECP to implement the ECM before starting earthwork.
There is a streamlined route for smaller works. Phase 3 of the ECM self-declaration scheme, effective from 1 January 2024, allows sites in specified categories to self-declare (IES). The scheme simplifies the approval process for eligible minor development works, while QECPs and contractors remain responsible for effective ECM design and implementation. The categories that qualify are defined in the IES circular and in PUB’s own guidance, and they change as the scheme expands, so confirm eligibility with your QECP against PUB’s current requirements before assuming a site is exempt from a full submission.
A practical test for a project team: if the works involve exposed earth, excavation, or stockpiling that could produce silty runoff, assume an ECM obligation exists and confirm in writing, with the QECP, whether the full submission or the self-declaration route applies.
What the ECM submission must contain
PUB’s ECM submission guidelines (October 2022 edition) require the submission to include project information, the construction sequence, design calculations and ECM drawings. A soil investigation report forms part of the supporting documents. The report and drawings must be endorsed by the QECP (PUB ECM submission guidelines).
A workable checklist for the documentation pack:
- Project information. Site location, area, development type, and the parties involved.
- Construction sequence. The phasing of earthworks, because ECM must change as the site changes.
- Site conditions. Terrain, soil profile, and the alignment of existing and proposed services, which PUB’s guidelines list as inputs the QECP needs from the developer or contractor.
- Design calculations. Including soil erodibility, for which PUB’s guidelines point QECPs to its Soil Erodibility Chart.
- ECM drawings. Showing the layout of erosion and sediment controls and the treatment and discharge points.
- Soil investigation report. Supporting evidence for the design assumptions.
- QECP endorsement. On the report and the drawings.
Erosion control and sediment control
PUB’s sample specifications describe the plan as combining erosion control measures, such as covering bare earth, with sediment control measures such as silt fences, holding ponds and treatment systems (PUB sample specifications). The logic is layered: first reduce the amount of soil that gets mobilized, then capture and treat what still moves.
The same logic applies to the ground that will not be disturbed at all. Protecting vegetation and root zones at the site edge keeps soil in place and reduces the load on sediment controls. This pre-construction tree protection guide shows how builders think about preserving trees before work begins, which is a useful way to picture undisturbed buffer areas on the ECM drawings.
For a wider view of how QECP-led design is approached in Singapore, see our guide to erosion control measures by QECPs.
How to submit and what happens in review
The process runs in a fixed order.
- Appoint the QECP. The developer or contractor engages a QECP, who is a professional engineer.
- Provide project information. Work sequence, site terrain, soil profile and service alignments are supplied to the QECP for proper design.
- QECP designs the plan. Calculations and drawings follow the construction sequence and site conditions.
- QECP submits to PUB. The applicant is the QECP.
- PUB reviews. The typical response time for approval of works requiring ECM is 14 working days (PUB service commitment).
- Implement before earthworks. The contractor puts the approved measures in place.
- Joint audit. On starting earthworks, the contractor performs a joint audit check with the QECP using the ECM site audit form, duly signed by both (PUB).
The 14 working days is a typical response time, not a guarantee, and it runs only on a complete submission. Incomplete drawings or a missing soil investigation report restart the clock in practice. Build the review period into the programme between mobilization and the first excavation, and file the ECM alongside the other approvals rather than after them.
When the design departs from PUB’s codes
Sometimes a site cannot meet a requirement in PUB’s Codes of Practice as written. A QP or PE seeking a waiver must submit a deviation application, charged at S$950 per deviation from 1 April 2025 (PUB Guide to Deviation Application). Raise any foreseeable deviation at design stage so it does not hold up the main approval.
Implementing, monitoring and maintaining the approved plan
Approval allows works to start. It does not end the obligation.
CCTV and treated water monitoring
Construction sites with a total area of 0.2 hectares or greater must install CCTV cameras to monitor treated water discharge. PUB encourages systems with auto-intervention features that halt discharge if Total Suspended Solids exceed 50 mg/L (PUB). PUB also conducts regular site inspections and analyzes CCTV feeds so that it can intervene when silty discharge is detected.
Its Silt Imagery Detection System uses image analytics on CCTV feeds to detect silt discharge automatically and alert stakeholders, so contractors can take prompt rectification action (PUB SIDS). A camera that is installed but poorly positioned or not maintained undermines the whole monitoring chain.
Records, revisions and removal
- Records. Contractors must maintain records of ECM operation and maintenance.
- Regular review. QECPs are responsible for reviewing ECM effectiveness regularly in tandem with construction phases and must advise the contractor when revisions are necessary (PUB submission guidelines).
- Removal. Contractors may not remove the ECM until all works are completed and the QECP has advised them to do so (PUB sample specifications).
A change in construction phase, such as moving from bulk excavation to foundation works, is the usual trigger for a plan revision. Agree with the QECP, at the start, which milestones prompt a review.
Monsoon preparation
PUB has asked sites to put proper soil control measures in place ahead of the monsoon season, when heavy rain raises the chance of silty discharge. Sites with stockpiles, open slopes or temporary drains should check their measures before sustained rain, not after.
Consequences of non-compliance
Failure to comply with ECM requirements can lead to financial penalties, stop-work orders and prosecution under the Sewerage and Drainage Act, which carries fines of up to S$50,000 (PUB). A stop-work order is often the costlier outcome, because idle crews, plant and subcontractors continue to accrue costs while the site is rectified.
The most common causes are structural rather than accidental: no approved plan at the time earthworks began, measures not updated when the sequence changed, treatment systems not maintained, and records not kept. Each of these is preventable with a QECP involved throughout and a site team that treats the audit form as a working document. Our guide to common earthworks failure causes in Singapore covers related failure patterns on site.
Coordinating the ECM submission with other approvals
Earth control rarely stands alone. A typical project with basements or retaining structures will also need:
- deep excavation approval, where the earth retaining and stabilising system is reviewed;
- a retaining wall submission where level changes trigger it;
- a piling permit before foundation works;
- settlement monitoring and PUB sewer checks before excavation.
The ECM design draws on the same excavation sequence and site data as these submissions. Using one consistent set of staging drawings across all of them reduces conflicting information reaching different authorities.
Our perspective
Most ECM problems we see begin before a drawing is drawn. The QECP is appointed late, the construction sequence is still changing, and the ECM plan is prepared from an outdated programme. The submission then has to be revised, and the review period is lost.
Our approach is to treat the ECM as part of the full authority submission strategy. A project that needs PUB, BCA and other approvals benefits from one team that understands how the earthworks sequence, the temporary works and the drainage requirements fit together. That is the reason we manage statutory authority submissions and PE endorsements as a coordinated package.
We also advise that ECM design should be priced at tender, not discovered during construction. When the plan is clear from the start, the contractor prices it, the developer budgets for it, and the site team knows what is expected on day one.
Aman
How AEC Technical Advisory supports your submission
AEC Technical Advisory is a Singapore engineering consultancy that handles statutory authority submissions, including those to PUB, together with structural and geotechnical engineering, PE endorsements and temporary works design. For developers and contractors, this means the ECM submission can be coordinated with the excavation, retaining and foundation approvals that run alongside it.
To discuss a project and its approval sequence, see our engineering and authority submission services or contact us through the AEC Technical Advisory site.
FAQ
What is an earth control measure?
An earth control measure is a method of preventing silt from construction sites and exposed earth from washing into waterways. Examples include covering bare earth, silt fences, holding ponds and treatment systems, according to PUB’s sample specifications. Together, they keep drains, canals and reservoirs working as intended.
Who submits the ECM plan to PUB?
The applicant is the Qualified Erosion Control Professional, who is a professional engineer engaged by the developer or contractor. The QECP designs the plan and endorses the report and drawings, and supervises implementation on site.
How long does PUB take to approve an ECM submission?
PUB’s typical response time for approval of works requiring ECM is 14 working days. This applies to a complete submission, so allow extra time for any clarifications and plan the programme around the approval.
Do all sites need a full ECM submission?
Not necessarily. The ECM self-declaration scheme, whose Phase 3 took effect on 1 January 2024, lets sites in specified categories self-declare, but QECPs and contractors remain responsible for effective ECM. Confirm eligibility with the QECP against PUB’s current requirements.
What happens if a site discharges silty water?
PUB can impose financial penalties and stop-work orders, and can prosecute under the Sewerage and Drainage Act, with fines of up to S$50,000. PUB inspects sites and analyzes CCTV feeds to catch discharge early.
Sources
- Earth Control Measures, PUB
- ECM press release, PUB (8 November 2024)
- ECM Guidelines for Stakeholders, PUB
- ECM Submission Guidelines, PUB (October 2022)
- ECM Sample Specifications, PUB
- Service Commitment, PUB
- Guide to Deviation Application, PUB
- Silt Imagery Detection System, PUB
- Expansion of ECM self-declaration, Phase 3, IES
- Environmental Protection, LTA