Changes

<onlyinclude>Of the standard granular materials in the standard [http://www.raqsb.mto.gov.on.ca/techpubs/ops.nsf/0/0b9aa4d966cac4f9852580820062909e/$FILE/OPSS.MUNI%201010%20Nov%2013.pdf OPSS.MUNI 1010] only '''Granular O''' is recommended as a substitute for [[reservoir aggregate| clear stone]] in LID construction.  

<onlyinclude>Of the standard granular materials in the standard [http://www.raqsb.mto.gov.on.ca/techpubs/ops.nsf/0/0b9aa4d966cac4f9852580820062909e/$FILE/OPSS.MUNI%201010%20Nov%2013.pdf OPSS.MUNI 1010] only '''Granular O''' is recommended as a substitute for [[reservoir aggregate| clear stone]] in LID construction.  

{{Textbox|1= Where Granular O is substituted for clear stone in underground reservoir structures, the porosity used in design calculations shall be '''0.3''' unless laboratory testing proves otherwise.}}

{{Textbox|1= Where Granular O is substituted for clear stone in underground reservoir structures, the porosity used in design calculations shall be '''0.3''' unless laboratory testing proves otherwise.}}

Examples of BMPs with underground reservoirs include [[Underdrains]], [[infiltration trenches]], [[permeable paving]], [[infiltration chambers]], [[exfiltration trenches]].  

Examples of BMPs with underground reservoirs include [[Underdrains]], [[infiltration trenches]], [[permeable pavements]], [[infiltration chambers]], [[exfiltration trenches]].  

All other mixes must be avoided for free drainage or storage as they are permitted to contain a higher enough proportion of fines to reduce permeability below 50 mm/hr.   

All other mixes must be avoided for free drainage or storage as they are permitted to contain a higher enough proportion of fines to reduce permeability below 50 mm/hr.