Princeton Wastewater Servicing Study Public Information Centre #1 - - PowerPoint PPT Presentation

Princeton Wastewater Servicing Study

Public Information Centre #1 November 3, 2011

Presentation Agenda

• Study Background and Scope
• Existing Conditions
• Future Population Growth
• Problem/ Opportunity Statement
• Alternative Solutions
• Proposed Evaluation Criteria
• Consultation
• Next Steps

1

Study Background, Objectives and Scope

• Oxford County completed the Princeton Water Servicing

Study in 2005. The Water Servicing Study:

• Identified aquifer contamination due to discharges from existing

septic systems, and

• Recommended that a communal water system be constructed.

The communal water system is currently under construction

• During the Princeton Water Servicing Study, the County

received a petition signed by 130 Princeton residents, requesting that a wastewater servicing study be completed for Princeton

2

Study Background, Objectives and Scope (Cont’d)

• Upon receiving the petition:
• Oxford County Public Works and Public Health and

Emergency Services Departments reviewed all un- serviced and partially serviced villages

• A priority list was developed for wastewater servicing

studies based on public health and environmental concerns

• Princeton was identified as having the highest priority

for investigating wastewater servicing alternatives

3

Study Background, Objective and Objective (Cont’d)

• Princeton Wastewater Servicing Study Objective
• Overall objective of the Princeton Wastewater Servicing Study

is to develop a wastewater servicing plan for the Community of Princeton that is environmentally responsible, socially acceptable and economically sustainable

• Princeton Wastewater Servicing Study Scope:
• Will conclude with the selection of a preferred solution and

design concept for providing wastewater servicing to Princeton

• The study is being undertaken as a Schedule ‘C’ Municipal

Class Environmental Assessment

• Study is expected to be completed in 2012

4

Class Environmental Assessment Process

Identify problem or opportunity Public Information Centre No. 1

PHASE 1

Identify and evaluate alternative solutions to the problem or opportunity Public Information Centre No. 2 Select a preferred solution

PHASE 2

Identify and evaluate alternative design concepts for the preferred solution Public Information Centre No. 3 Select preferred design concept

PHASE 3

Complete Environmental Study Report (ESR) ESR placed on public record for review and comment

PHASE 4

Complete contract drawings and tender documents Proceed to construction and operation Monitor for environmental provisions and comments

PHASE 5

We are here

5

Existing Conditions

• Wastewater treatment is currently provided by on-

site wastewater septic tank systems

• Analysis of existing septic systems was completed

to:

• Estimate the age of existing systems based on

available records

• Identify what type of replacement wastewater system

could be installed on each property based on the requirements of the current Ontario Building Code

6

On-Site Wastewater Systems

• Conventional Septic System
• Most commonly used technology, relatively low operating costs
• Advanced Treatment System
• Higher installation and operating costs than a septic system
• Can be installed in areas with poor soil conditions/ high

groundwater table

• Generally, smaller leaching or tile bed size is required
• Holding Tank
• Lower cost to install, high operating cost due to need for regular

pumping

• Is not permitted for long term servicing of development

properties where there is currently no septic system/ building

7

Existing System Age

Number of Systems Between 0 and 25 Years Old 40 (19%) Number of Systems Between 25 and 35 Years Old 15 (7%) Number of Systems 35 Years Old or More 154 (74%) Total Number of Systems 209

• Life span of a typical septic system is 20 to 25 years
• Some systems can function effectively for 35 years

8

Estimated Maximum Number of Properties That Can Accommodate a Conventional Septic System 58 (28%) Estimated Maximum Number of Properties That Can Accommodate an Advanced Treatment System 58 (28%) Estimated Minimum Number of Properties That Cannot Accommodate a Septic System/ Advanced Treatment System. A Holding Tank Would be Required 93 (44%) Total Number of Properties 209

Current Ontario Building Code Requirements

9

Existing Systems

• Estimated number of existing systems that are less than

35 years old and meet the current Ontario Building Code requirements is 17 (8%)

• For systems more than 35 years that do not meet the

current Ontario Building Code requirements:

• It was estimated that a maximum of 46 or 22% of existing

systems could be replaced by a septic system

• It was estimated that a maximum of 55 or 26% of existing

systems could be replaced by an advanced treatment system

• It was estimated that a minimum of 91 or 44% can only be

replaced by a holding tank

10

Summary of Existing Conditions

• Many existing septic systems will need to be

replaced in the near term due to age

• Replacement systems will need to comply with the

current Ontario Building Code

• It is estimated that only 22% of existing septic

systems can be replaced by a new septic system. Remaining properties will require an advanced treatment system or a holding tank

11

Future Growth in Princeton

• Moderate growth within the existing community

boundary is anticipated

• Existing population (residential and equivalent

non-residential) is estimated to be 973 persons including 648 residents plus an equivalent industrial, commercial and institutional population

• Future population (residential and equivalent non-

residential) is estimated to be 1,648 persons

12

Future Growth in Princeton (cont’d)

• Projected

future wastewater flow of 705 m3/d for the Community of Princeton

Population and Flow Projections

500 1000 1500 2000 Year Projected Population 200 400 600 800 Projected Flow (m3/d) Population Flow Projection

2011 Future

13

Problem/ Opportunity Statement

• 192 of 209 existing systems (92% of all systems)

will require replacement due to age in the short term or do not meet the requirements of the current Ontario Building Code

• There is existing or planned capacity available at

existing wastewater treatment facilities that serve neighbouring communities that could be used to service Princeton

14

Alternative Solutions

• The Municipal Class EA process requires that all reasonable

alternative solutions be evaluated

• Alternative solutions that are being considered for this study are:
• Continue to provide support and public education to residents on proper
• peration and maintenance of their existing systems and continue to inspect

existing systems

• Upgrade existing systems, where required, to meet the requirements of the

current Ontario Building Code

• Construct a new communal wastewater collection system and treatment

facility in Princeton

• Construct a new communal wastewater collection system and pump

wastewater for treatment to an existing neighbouring community wastewater treatment facility 15

Proposed Evaluation Criteria

• Natural Environment
• Impacts on surface water resources
• Impacts on terrestrial resources
• Impacts on groundwater resources
• Social Environment
• Impacts on adjacent land owners

and users during long term

• peration of alternative
• Impacts on adjacent land owners

and users during construction

• Construction impacts
• Impacts on future development
• Potential for odour emissions
• Risk to human health
• Technical Environment
• System complexity
• Increase in operating requirements
• The need for additional studies
• Approval requirements
• Implementation and Operational

Risk

• Economic Environment
• Capital cost
• Annual operating and maintenance

costs

• Life-cycle costs
• Need for property acquisition

16

Consultation

• Agency and Stakeholders
• Study Mailing List
• Project Notices
• Public Information Centres
• Oxford County and Township of Blandford-

Blenheim Websites

• Tracking your comments

17

Next Steps

• Receive and consider public input
• Evaluate alternative solutions
• Hold Public Information Centre No. 2 to present the

recommended alternative solution

• Finalize preferred solution
• Develop and evaluate alternative design concepts
• Hold Public Information Centre No. 3 to present the

recommended alternative design concept

• Finalize preferred design
• Begin 30 day public review period for the Environmental

Study Report (Spring 2012)

18

Questions and Discussion

19