Presentation Outline Intake Protection zone -3 IPZ-3 Extension - - PowerPoint PPT Presentation

Presentation Outline

 Intake Protection zone -3  IPZ-3 Extension  Work update

 SCRCA  LTVCA

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 The Zone that may contribute contaminants to the intake

during extreme events.

 IPZ-3 shall be delineated if modeling demonstrates that

contaminants released during an extreme event may be transported to the intake.

 An activity may be listed as a significant threat if modeling

demonstrates that a spill could result in deterioration of the water supply.

Intake Protection zone -3

Spill Scenarios

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BrightsGrove Intake IPZ-3

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Wallaceburg Intake IPZ-3

IPZ-3 Extension Workplan

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1) Investigate effects of fuel spills on Aberarder Creek, Douglas drain, Hickory Creek and the effects to the Lake Huron Intakes. 2) Investigate effects of spills on Talfourd Creek, Baby Creek and Marshy Creek and its effects on Wallaceburg Intake. 3) Investigate the extent of IPZ-3 in the Lower Thames watershed for the Belle river, Stoney point and Wheatley intakes (ERCA)

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Extension along Aberarder creek, Kernohan drain, Douglas drain and Hickory creek 6.8 10 8.7 8.35 Aberarder creek Hickory creek Douglas drain Kernohan drain

IPZ-3 Extension – Lake Huron Intakes

• Analysis inputs
• Width
• Depth
• 2 year flow
• Mass

BrightsGrove Intake

BrightsGrove IPZ-3 (Preliminary)

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Other considerations for IPZ-3 Extension (Wallaceburg)

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• Perform analysis on Talford, Clay

Creek, baby Creek and few other drains.

Limitations of LDA (Wallaceburg Intake)  Multiple tributaries and creeks drain into St. Clair River  Chenal E- carte is a Distributary

• f St . Clair River

 Running creek is a Distributary

• f St. Clair River

Lower Thames IPZ-3 Extension

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Wheatley intake

• Two Creeks

Stoney Point Intake

• Big Creek
• Janeattes Creek
• Lower Thames River

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Lower Thames IPZ-3 Extension

Two Creeks Yellow Creek

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Lower Thames IPZ-3 Extension

• Spill at upstream reaches of Big Creek will lead to 0.268 mg/L at the mouth
• Spill at Prairie Siding Bridge will lead to 0.215 mg/L at the mouth.
• Spill on Jeanettes creek will lead to 0.179 mg/L.

Upstream extent Big Creek Upstream extent Baptiste Creek

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• ICA Overview
• Methodology
• Work Update

Issue : A substantiated condition relating to the quality of water that interferes or

is anticipated to soon interfere with the use of a drinking water source by a municipal residential system or designated system.

Water Supply System Issues LAWSS No issues Brights Grove Intake No issues Wallaceburg treatment plant Nitrates, Organic nitrogen, Turbidity and Hardness

Issues identified in the Approved Assessment Report

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ICA definition : Area within a vulnerable area (IPZ / WHPA) where an activity

• r condition can contribute to an issue.

Wallaceburg treatment plant – Nitrate Trend

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ICA Delineation Methodology

1)Trend Analysis of Nitrates 2)Time of occurrence ( Months in a year) 3)Flow conditions during these months 4)Areas or watersheds that have the potential to contribute nitrate in exceedence of ½ MAC or 5 mg/l will be delineated as ICA.

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Land Use

• Residential land
• Industrial land
• Agricultural land

Wastershed Characteristics

• Area
• Slope
• Flow length

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Nitrate (mg/l)

PC SWMM - Model

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Lambton Shores – Shashawandah creek – Validation

0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 20.00 10 20 30 40 50 60 70

Nitrate (mg/l) Time in hours 29-Jan-13 8-Mar-13 3-Apr-13 29-May-13

Watershed characteristics

• Area
• Slope
• Imperviousness
• Flow length
• Land use

Assign Rainfall

• Closest to measured

PCSWMM model validation

• TAC meeting -1

September 17, 2013

• TAC meeting -2

October 15, 2013

• TAC meeting -3

October 29, 2013

• Final Report

Nov 7, 2013

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