TRI/Environmental:

ASTM D7351

Standard Test Method

For determination of sediment retention device effectiveness in sheet flow applications.

Greensville, SC – October 2007

Test set up

The test involved a simulated 10-year storm event.

• 5000 lbs of water

• 240 lbs of sandy loam soil

• 100 ft 3-1 slope

Mixture pumped down to an installed section of DuraWattle.

DuraWattle Test Results Reduction Levels
Gravel 100%
Sand 99.8%
Silt 93.2%
Clay 88.3%

FINAL VERDICT: 96.6% SEDIMENT RETENTION

ASTM D7351 Testing, Tri Environmental, Oct 2007
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