Eradicating Estuary

PollutionPresentation to Section

80 Committee. November 2012.

Regular monthly testing at culverts and places where river systems

enter the estuary indicate consistently high E. Coli counts.

System is flushed by the tides daily so, while we cannot allow the

current situation to continue, it is not too late for remedial action.

How do we know there is a problem?

• Failure to capture pollutants (human and animal faeces, carcasses

of dead animals and other solid waste) in the upper parts of the

catchment;

• Inadequate infrastructure to manage waste in the sewer system

between upper catchment and sewage works;

• Inadequate and outdated sewage works;

• Massive ingress of storm water into sewers exacerbating

infrastructure problems;

• Ingress of other materials that cause blockages;

• Inadequate systems to manage problems.

Main Sources of Pollution

Control What Goes into Rivers and Storm Water

Interventions

Build communal toilets

in informal areas

Improve solid waste

collection and removal

systems

Clean river banks

Plumbing tests at low

cost housing

developments

Audit of connections

(fine and monitor

transgressors)

Keep what should not be in

the river and storm water

systems out of them

Control What Goes into the Sewers

Interventions

Storm water master

plan

Public campaign to

sensitise public

Audit of connections

(fine and monitor

transgressors)

Facilitate processing of

fat from fat traps

Keep what should not be

in the sewers out of them

Fix the Infrastructure

Interventions

R40 million upgrade to

sewage works

Remedial works to

aging sewers and

storm water pipes

New bigger main line

across town

Upgrade critical pump

stations

Install overflow

chambers

Replace and upgrade the

parts of the infrastructure

that are critical

Improve Control Systems

Interventions

Regularly clear and

inspect servitudes and

sewer lines and check

chambers

Enhance telemetry

systems

Dedicated staff to monitor

telemetry system

Install level sensors and

alarms

Risk assessment on

sewage works upgrade

and operations with

standard procedures

Improve incident reporting

Avoid problems where

possible and find out

about them and deal

with them quickly when

they happen

Mitigate where necessary

Interventions

Clean the sludge away

from area next to

George Rex Drive

Establish floating

wetlands

Establish mushroom

beds

Carefully balanced

chlorination of rivers

and storm water

outfalls

Screening of Storm

water outfalls

Use chemical and

biological systems to

purify the water going

into the estuary

Item Priority Number:

Details: Estimated Cost Time Frames Responsible Department

Sludge removal

Remove remaining sludge in Eastern wetland at George Rex Drive.

R 30 000-00-once off. Process complete by end of November 2012.

Environmental Management

River Health Programme

Monthly River clean-ups R 115 200-00 p.a.

From 15/11/12 onwards. Continuous. Monthly.

Environmental Management

Solid Waste Weekly Collection of waste. Will form part of the weekly operational items of Solid Waste Management.

From 12 November 2012. Continuous on a weekly basis.

Solid Waste

Chlorination Chlorinating storm water and River systems

R50 000-00 p.a Programe started 20 December 2011.

Environmental Management.

Floating Wetlands

Install permanent floating wetlands R50 000-00-once off: Wetlands in place by end of February 2013.

Environmental Management

Funded Projects

Item Priority Number:

Details: Estimated Cost Time Frames Responsible Department

Myco-Filtration (Mushroom system)

Experiment with myco filtration. R50 000-00-once off: Systems in place by end of December 2012.

Environmental Management

Cleaning of fat traps.

All fat traps in the CBD area from restaurants, butcheries etc

Call for Proposals. To be financed by successful bidder.

Call for proposal advertised by mid January 2013

Town Planning

Sewer House Connections

Check all properties for illegal connections (sewer to storm water and storm water to sewer).

Issue a R300 000-00 tender.

Tender advertised by mid January 2013

Town Planning

Toilets Install communal water-borne toilets in northern areas

R8 680 131-00 (project has started already).

Complete by end June 2013

Integrated Human Settlements

Funded Projects

Item Priority Number: Details: Estimated Cost Time Frames Responsible Department

Upgrade Knysna Sewer Works (Phase 1)

Mechanical, Electrical and Sludge Dewatering Equipment

R11 403 000-00 (Mechanical, Electrical) R7 685 000-00 (Sludge Dewatering)

Mechanical and electrical commissioned by December 2012. Sludge dewatering by May 2013

Water and Sewer Department

Concordia Sawmill Bulk Services

Create capacity in Heron’s Way

R900 000-00 Commissioned by June 2013 Water and Sewer Department

Telemetry System Service System R55 000-00 Initial Service Contract complete end November 2012

Water and Sewer Department

Upgrade Under Milkwood Drive Pumpstation

Repair pipework and panel

R150 000-00 Commissioned by end November 2012

Water and Sewer Department

Upgrade Pumpstations in Northern Areas

Pipework and Guiderails R 150 000-00 Commissioned by end 30 November 2012

Water and Sewer Department

Totals R29 618 331-00

Shortfall:R380 000.00

Funded Projects

Still to Be Funded Projects

ESTIMATED COSTS FOR ESTUARY POLLUTION MITIGATION MEASURES General Work River System Sewer System Stormwater System Sewer Works

ITEM DESCRIPTION UNIT QTY RATE AMOUNT O&M Planning Current Yr Capex Yr1 Capex Yr2 Capex Yr3 Capex Yr4 Capex Yr5

1 Water Quality Sampling and Testing mnths 1 34 250.00 34 250

2 Clear Servitudes and Check Chambers mnths 1 33 900.00 33 900

3 Telemetry Systems 161 600.00 161 600

4 Pipeline- and Route Inspections and Reporting mnths 12 28 500.00 342 000

5 Illegal Connection Audits mnths 12 27 000.00 324 000

6 Community Environmental Workshops Sum 1 100000 100 000.00 100 000

7 Portable Level Sensors and Alarms Sum 4 20000 80 000.00 80 000

8 Remedial Work and Upgrading of Sewerage Infrastructure 23 893 942.93

8.1 New Rising Main to Main Sewage PS Sum 1 4 701 124.84 200 000 1 000 000 3 501 125

8.2 New Salt River or Hedge Street PS Sum 1 4 914 193.09 2 000 000 2 914 193 0

8.3 CBD main Western Sewer (trenchless) Sum 1 8 750 000.00 8 750 000

8.4 Remedial Work to Old Place, Hornlee, Khaylethu Outfall Sewers Sum 1 2 028 625.00 900 000 1 128 625

8.5 Main Sewage PS Upgrade Phase 2 Sum 1 3 000 000.00 3 000 000

8.6 Condition Assessment of Sewage Network_CCTV (5x) Sum 1 500 000.00 500 000

9 Remedial work to Problem and Ageing Stormwater Pipelines Sum 1 1 000 000.00 1 000 000

10 Wetland and Reedbed Investigation Sum 1 300000 300 000.00 300 000

11 Overflow Chambers at Sewage PS's 660 000.00 105 600 132 000 132 000 132 000 79 200 79 200

12 Sanitation Facilities in Informal Areas Sum 1 200 000.00 200 000

13 Compile Catchment, Stormwater and River Mngmnt Strategy Sum 1 180 000.00 180 000

14 Compile (update) Stormwater Masterplan Sum 709 350.00 709 350

15 Regular Cleanup Programmes for All Watercourses mnths 12 28 500.00 342 000

16 Upgrade the SBR Unit 9 438 000

17 Investigate to relocate Knysna Sewer Works 500 000

TOTALS (Excl. VAT) 1 237 750 1 789 350 10 035 600 4 260 625 12 684 193 1 632 000 6 580 325 79 200

CATEGORY TOTALS (Excl. VAT) O&M Planning Current Yr Capex Yr1 Capex Yr2 Capex Yr3 Capex Yr4 Capex Yr5

General

Rivers System 324 000 400 000 200 000 0 0 0 0 0

Sewer System (Including the sewer works) 571 750 500 000 9 835 600 3 260 625 12 684 193 1 632 000 6 580 325 79 200

Stormwater System 342 000 889 350 0 1 000 000 0 0 0 0

Estimated Totals 1 237 750 1 789 350 10 035 600 4 260 625 12 684 193 1 632 000 6 580 325 79 200

Total Estimated Cost for Project 38 299 043

A) That Council notes the contents of the report as well the report from

the consultants, Royal Haskoning DHV (SSI);

B) That Council makes an in principle commitment, subject to the

availability of funding, to commit the required resources to the extent of

at least R38 299 043.00 over the next 5 years to the permanent

reduction of pollution in the estuary to within acceptable norms.

C) That Council instructs the Municipal manager to include all the items in

projects in table 2 in the Draft Medium Term Revenue and Expenditure

Framework starting from the 2013-2014 financial year;

Recommendations

D) That Council instructs the Municipal Manager to include the projects in the

draft adjustment budget for 2012-2013 to cover the projects shortfall of

R380 000.00 for the current year; this shortfall to be financed from either

additional operating revenues identified during the Adjustments Budget or,

should additional revenues not be available, then savings be identified

within other operating projects and/or repairs and maintenance; and that

Council commits itself to support this element of the Adjustments Budget;

E) That Council supports the call for proposals for the cleaning of fat traps in

the CBD

Recommendations (Continued)

F) That Council supports the investigations into the relocation of the

Knysna Waste Water Treatment Works;

G) That council mandates the Municipal Manager to apply to the following

institutions for further funding: The Department of Human Settlements;

The Danish International Development Agency, Department of Water

Affairs, Department of Environmental Affairs and any other available

source of funding for the projects.

Recommendations (Continued)