AECOM Report B&W - N - City of Guelph

City of Guelph2008 Annual ReportClosed Eastview Road Landfill Siteb) to evaluate the effectiveness of the perimeter leachate containment and collection system inpreventing leachate impacts in Hadati Creek;c) to evaluate the effectiveness of sediment control measures in reducing total suspended solidsconcentrations to the wetland in the southeast part of the site; andd) to provide a mechanism which will trigger the implementation of a contingency plan in theevent that the landfill is not in compliance with the surface water policies of the MOE.5.2 Sampling Methodology and Site DescriptionsNine monitoring stations (Figure 19) are routinely sampled; however, parameter analyses vary between thestations. A typical sampling event consists of measuring field parameters (pH, conductivity, dissolvedoxygen, temperature and stream width and depth) as well as collecting water samples and delivering them toa certified laboratory on the same day for analysis for the designated parameters. In 2008, City of Guelphstaff collected the water samples and Maxxam Analytics performed the water sample analyses.The surface water monitoring program protocol developed by Gartner Lee Limited (1993) specifies eight (8)monitoring events per year. These are designed to cover a range of seasons and weather patterns,including four (4) dry weather and four (4) wet weather sampling events. This program was modified in2007 to include four monitoring events/year, two (2) dry weather and two (2) wet weather.5.2.1 Background water Quality StationsStations SW15, SW7 and SW5 represent background water quality from different watersheds in the vicinityof the landfill.SW15 is located in an adjacent watershed on the southeast side of Speedvale Avenue, northeast of landfillproperty boundary at Watson Road.SW7, also located in an adjacent watershed, is on the northeast side of Watson Road approximately halfwaybetween Eastview Road and Grange Road.SW5 is located at the upstream end of the ditch on the southwest side of the landfill property. This is theonly surface water flow path entering the site under normal flow conditions and represents background waterquality, upstream of the landfill.5.2.2 On-Site Water Quality StationsSW1 is located along the southwest ditch at the storm sewer inlet near the landfill entrance off EastviewRoad. Water quality at this location indicates the contributions (if any) from the landfill to the southwest ditchby comparison with results from SW5.(111414_2ra_apr29-09_city_of_guelph.doc) - 42 -