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The water quality load is the product of runoff concentrations and runoff volumes.  Hence, a change in either of these variables will result in a change in load.  As concentrations and volumes are affected by different variables it is best to consider the components separately, and then combine them to calculate overall load based performance for the treatment train under consideration.     
The water quality load is the product of runoff concentrations and runoff volumes.  Hence, a change in either of these variables will result in a change in load.  As concentrations and volumes are affected by different variables it is best to consider the components separately, and then combine them to calculate overall load based performance for the treatment train under consideration.     


===Calculations for Load Based Performance==
==Calculations for Load Based Performance==
Treatment performance of facilities designed to reduce runoff volumes would be calculated based on their capacity to reduce water quality loads, as seen below:
Treatment performance of facilities designed to reduce runoff volumes would be calculated based on their capacity to reduce water quality loads, as seen below:


==References==
==References==

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