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*Coarse sand for LID construction shall be clean and free free of toxic materials.
*Coarse sand for LID construction shall be clean and free free of toxic materials.
*The pH of the sand shall be ≤ 7.0. Manufactured sand from limestone or dolostone parent material is not acceptable.</li>
*The pH of the sand shall be ≤ 7.0. Manufactured sand from limestone or dolostone parent material is not acceptable.
*The coarse sand shall have a fineness modulus index between 2.8 and 3.1 according to [https://www.astm.org/Standards/C33 ASTM C33/C33M], or otherwise meet the gradation below.
*The coarse sand shall have a fineness modulus index between 2.8 and 3.1 according to [https://www.astm.org/Standards/C33 ASTM C33/C33M], or otherwise meet the gradation below.
!style="background: darkcyan; color: white"|Sieve
!style="background: darkcyan; color: white"|Sieve
!style="background: darkcyan; color: white"|Percent passing
!style="background: darkcyan; color: white"|Percent passing
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|9.5 mm||100
|9.5 mm||100