Presby Sand

now have presby copy

· System Sand is a clean, granular, coarse to very coarse sand, free of organics

· System Sand should contain less than 2% fines (clay and silt)

Presby Environmental System Sand Specifications System Sand contains… PEI Specs % (by weight) Particle Size (metric) Particle Size (inches) Sieve # reference GRAVEL (up to ¾ in.) 0 – 35% 2-76 mm 0.08-0.75 in. 5/64 –3/4 in. Passes ¾ in. Retained #10 SAND (coarse & very coarse) 40 – 90% (the more, the better) 0.5-2.0 mm 0.0196-0.079 in. 1/64 – 5/64 in. Passes #10, Retained #35 FINES (silt/clay) No more than 2% (CRITICAL) < .075 mm < 0.0029 in. Passes #200