Sand

From LID SWM Planning and Design Guide
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  • The 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.
  • The coarse sand shall have a fineness modulus index between 2.8 and 3.1 according to ASTM C33/C33M, or otherwise meet the gradation below.
Particle size distribution
SievePercent passing
9.5 mm100
4.75 mm (No.4)95-100
2.36 mm (No.8)80-100
1.18 mm (No.16)50-85
0.60 mm (No.30)25-85
0.30 mm (No.50)5-30
0.15 mm (No.100)0-10
0.75 mm (No.200)≤ 3