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  1. CashCabby

    Highly organic silts and clays as defined by seismic code.

    Thanks Jeff, The reference in the link is similar to the current ASTM D 2487 (USCS). However, ASTM D 2487 does not distinguish OL and OH as "highly organic", just organic. I recently found a table in DM 7.01 (Table 5)that published properties of orgaic soils with different concentrations of...
  2. CashCabby

    Highly organic silts and clays as defined by seismic code.

    I understand the quantitive definition of organic silt/clay (OL OH) using ASTM 2487-06, but can anybody direct me to a resource that describes what a "HIGHLY organic silt/clay" is vs "organic silt/clay"? IBC 2006, ASCE-7 2005, and FEMA 450 all use the term "highly organic" for seismic site...

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