AECOM Report B&W - N - City of Guelph

Table C8: Comparison of Downgradient Bedrock Boundary Monitors to Guideline B7 Criteria for 2008Parameter Chloride Sodium Sulphate Copper Iron Manganese Zinc Boron Cadmium Chromium Lead Nitrate NitriteODWS 250 200 500 1 0.30 0.05 5 5 0.005 0.05 0.01 10 1Background12.2 14.0 22.57 0.35 0.01 0.02 0.0610.0050.10 0.01Guideline B7 Criteria131 107 261 0.35 0.03 2.51 1.300.0162.58 0.2613-I 02-May-08 1.0 36.0 < 1.0 0.14 0.01 < 0.01 0.098< 0.01< 0.10 < 0.0109-Sep-08 < 1.0 37.0 < 1.0 0.15 0.01 < 0.01 0.093< 0.01< 0.10 < 0.0114-IV 02-May-08 1.0 38.0 < 1.0 < 0.10 < 0.00 < 0.01 0.092< 0.01< 0.10 < 0.0120-Jun-08 < 1.0 38.0 < 1.0 < 0.10 < 0.00 < 0.01 0.093< 0.01< 0.10 < 0.0111-Sep-08 < 1.0 41.0 < 1.0 < 0.10 < 0.00 < 0.01 0.090< 0.01< 0.10 < 0.0125-Nov-08 < 1.0 43.0 < 1.0 < 0.10 < 0.00 < 0.01 0.140< 0.01< 0.10 < 0.0115-I 29-Apr-08 1.0 38.0 < 1.0 < 0.10 < 0.00 < 0.01 0.094< 0.01< 0.10 < 0.0109-Sep-08 < 1.0 40.0 < 1.0 < 0.10 < 0.00 < 0.01 0.093< 0.01< 0.10 < 0.0116-VII 02-May-08 1.0 42.0 < 1.0 < 0.10 0.01 < 0.01 0.094< 0.01< 0.10 < 0.0120-Jun-08 < 1.0 37.0 < 1.0 < 0.10 < 0.00 < 0.01 0.110< 0.01< 0.10 < 0.0111-Sep-08 < 1.0 41.0 < 1.0 < 0.10 0.00 < 0.01 0.099< 0.01< 0.10 < 0.0126-Nov-08 4.0 40.0 < 1.0 < 0.10 < 0.00 0.01 0.097< 0.01< 0.10 < 0.0117-I 30-Apr-08 1.0 34.0 < 1.0 0.51 0.01 0.01 0.085< 0.01< 0.10 < 0.0111-Sep-08 < 1.0 38.0 < 1.0 0.5 0.01 0.01 0.080< 0.01< 0.10 < 0.019A-I 30-Apr-08 9.0 41.0 4.0 0.25 0.01 < 0.01 0.130< 0.01< 0.10 < 0.0111-Sep-08 8.0 42.0 4.0 0.25 0.01 < 0.01 0.120< 0.01< 0.10 < 0.01Average concentration in 2008 from monitors 4-IR, 19-I, 53-I, 54-I used in comparison to Guideline B7 valuesConcentrations that exceed the Guideline B7 criteria are marked are bolded and underlinedExceedances observed for lead are due to the Laboratory Method Detection LimitAll concentrations are in mg/L(11a RPT Bedrock reasonable use-Ba/Eastvw8/80-131/Apr-09)Page 1 of 1