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[[File:Aggregates Highway 7.jpg|thumb|The fines can clearly be seen on these piles of standard OPSS aggregates for road reconstruction]]
[[File:Aggregates Highway 7.jpg|thumb|The fines can clearly be seen on these piles of standard OPSS aggregates for road reconstruction]]
<onlyinclude>Of the standard granular materials in the standard [http://www.raqsb.mto.gov.on.ca/techpubs/ops.nsf/0/0b9aa4d966cac4f9852580820062909e/$FILE/OPSS.MUNI%201010%20Nov%2013.pdf OPSS.MUNI 1010] only '''Granular O''' is recommended as a substitute for [[reservoir aggregate| clear stone]] in LID construction.
<onlyinclude>Of the standard granular materials in the standard [https://www.roadauthority.com/Standards/?id=a28fdfaf-3bf8-4679-81ca-4e44b2263cf8] only '''Granular O''' is recommended as a substitute for [[reservoir aggregate| clear stone]] in LID construction.
{{Textbox|1= Where Granular O is substituted for clear stone in underground reservoir structures, the porosity used in design calculations shall be '''0.3''' unless laboratory testing proves otherwise.}}
{{Textbox|1= Where Granular O is substituted for clear stone in underground reservoir structures, the porosity used in design calculations shall be '''0.3''' unless laboratory testing proves otherwise.}}
Examples of BMPs with underground reservoirs include [[Underdrains]], [[infiltration trenches]], [[permeable pavements]], [[infiltration chambers]], [[exfiltration trenches]].
Examples of BMPs with underground reservoirs include [[Underdrains]], [[infiltration trenches]], [[permeable pavements]], [[infiltration chambers]], [[exfiltration trenches]].
{| class="wikitable"
{| class="wikitable"
|+ Grain size analysis, percent passing<ref>OPSS. (2013). Material Specification for Aggregates - Base, Subbase, Select Subgrade, and Backfill Material. Retrieved from http://www.raqsb.mto.gov.on.ca/techpubs/ops.nsf/0/0b9aa4d966cac4f9852580820062909e/$FILE/OPSS.MUNI%201010%20Nov%2013.pdf</ref> <ref>OPSS. (2020). Construction Specification for Open Grades Drainage Layer. OPSS.PROV 320. Retrieved from: https://www.roadauthority.com/Standards/Home/FileDownload?standardFileId=b159a440-9c86-4086-a9d1-4906c1ecb258</ref>
|+ Grain size analysis, percent passing<ref>OPSS. (2013). Material Specification for Aggregates - Base, Subbase, Select Subgrade, and Backfill Material. Retrieved from https://www.toronto.ca/wp-content/uploads/2017/11/91ba-ecs-specs-roadspecs-TS_1010_Sep2017.pdf</ref> <ref>OPSS. (2020). Construction Specification for Open Grades Drainage Layer. OPSS.PROV 320. Retrieved from: https://www.toronto.ca/wp-content/uploads/2017/11/91ba-ecs-specs-roadspecs-TS_1010_Sep2017.pdf</ref>
!rowspan = "2" align = center| Sieve size (mm)
!rowspan = "2" align = center| Sieve size (mm)
!colspan = "2" align = center| A
!colspan = "2" align = center| A