Presentation Outline Intake Protection zone -3 IPZ-3 Extension Work update SCRCA LTVCA 1
Intake Protection zone -3 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. 2
Spill Scenarios 3
BrightsGrove Intake IPZ-3 4
Wallaceburg Intake IPZ-3 5
IPZ-3 Extension Workplan 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) 6
IPZ-3 Extension – Lake Huron Intakes Extension along Aberarder creek, Kernohan drain, Douglas drain and Hickory creek 8.7 • Analysis inputs 10 • Width 8.35 • Depth 6.8 Douglas • 2 year flow drain • Mass Hickory creek Aberarder Kernohan creek drain BrightsGrove Intake 7
BrightsGrove IPZ-3 (Preliminary) 8
Other considerations for IPZ-3 Extension (Wallaceburg) • 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 of St . Clair River Running creek is a Distributary of St. Clair River 9
Lower Thames IPZ-3 Extension Wheatley intake • Two Creeks Stoney Point Intake • Big Creek • Janeattes Creek • Lower Thames River 10
Lower Thames IPZ-3 Extension Two Creeks Yellow Creek 11
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 Baptiste Creek Upstream extent Big Creek 12
• ICA Overview • Methodology • Work Update 14
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. Issues identified in the Approved Assessment Report Water Supply System Issues LAWSS No issues Brights Grove Intake No issues Wallaceburg treatment plant Nitrates, Organic nitrogen, Turbidity and Hardness ICA definition : Area within a vulnerable area (IPZ / WHPA) where an activity or condition can contribute to an issue. 15
Wallaceburg treatment plant – Nitrate Trend 16
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. 17
Wastershed Characteristics Land Use • Area • Residential land • Slope • Industrial land • Flow length • Agricultural land PC SWMM - Model Nitrate (mg/l ) 18
Lambton Shores – Shashawandah creek – Validation 20.00 18.00 16.00 14.00 29-Jan-13 12.00 Nitrate 8-Mar-13 10.00 (mg/l) 3-Apr-13 8.00 6.00 29-May-13 4.00 2.00 0.00 0 10 20 30 40 50 60 70 19 Time in hours
PCSWMM model validation Watershed characteristics • Area • Slope • Imperviousness • Flow length • Land use Assign Rainfall • Closest to measured
• TAC meeting -1 September 17, 2013 • TAC meeting -2 October 15, 2013 • TAC meeting -3 October 29, 2013 • Final Report Nov 7, 2013 22
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