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LID SWM Planning and Design Guide β

Sand

Particle size distribution graph for C33 sand, as described in table
  • Coarse sand for LID construction shall be washed 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
Sieve Percent passing
9.5 mm 100
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 - 50
0.30 mm (No.50) 5 - 30
0.15 mm (No.100) 0 - 10
0.075 mm (No.200) ≤ 3