Changes

The mean performance value recorded at each of the rainwater cistern practices, was to measure their ability to remove Total Phosphorus (TP), which was calculated based on 24 separate recordings from 2007-2010 at each of the aforementioned locations listed above.

The mean performance value recorded at each of the rainwater cistern practices, was to measure their ability to remove Total Phosphorus (TP), which was calculated based on 24 separate recordings from 2007-2010 at each of the aforementioned locations listed above.

As can be seen in the corresponding boxplot, the mean performance removal efficiency of the infiltration trench practice monitored is not meeting the acceptable upper extent range of nutrients as it is 0.03 mg/L (30 µg/L) (Environment Canada, 2004<ref name="example1">Environment Canada. (2004). Canadian guidance framework for the management of phosphorus in freshwater systems. Ecosystem Health: Science‐based solutions report no. 1–8. Cat. No. En1–34/8–2004E. </ref>; OMOEE, 1994<ref>Ontario Ministry of Environment and Energy (OMOEE), 1994. Policies, Guidelines and Provincial Water Quality Objectives of the Ministry of Environment and Energy. Queen’s Printer for Ontario. Toronto, ON.</ref>).

As can be seen in the corresponding boxplot, the mean performance removal efficiency of the rainwater cistern practices monitored is not meeting the acceptable upper extent range of nutrients as it is 0.03 mg/L (30 µg/L) (Environment Canada, 2004<ref name="example1">Environment Canada. (2004). Canadian guidance framework for the management of phosphorus in freshwater systems. Ecosystem Health: Science‐based solutions report no. 1–8. Cat. No. En1–34/8–2004E. </ref>; OMOEE, 1994<ref>Ontario Ministry of Environment and Energy (OMOEE), 1994. Policies, Guidelines and Provincial Water Quality Objectives of the Ministry of Environment and Energy. Queen’s Printer for Ontario. Toronto, ON.</ref>).

The median value of the 24 samples taken was '''0.05 mg/L''' whereas the mean was ''' 0.11 mg/L''', with a '''100%''' guideline exceedance. Given the small sample size of just  24 grab samples further monitoring projects will be required to ensure that the results collected are as accurate as possible to ensure these practices can meet federal and provincial governments' guideline requirements for TP stormwater quality.

The median value of the 24 samples taken was '''0.05 mg/L''' whereas the mean was ''' 0.11 mg/L''', with a '''100%''' guideline exceedance. Given the small sample size of just  24 grab samples further monitoring projects will be required to ensure that the results collected are as accurate as possible to ensure these practices can meet federal and provincial governments' guideline requirements for TP stormwater quality.