Specifications include, but are not limited to: The following chip types and sources will be considered: • Paper grade sawmill chips derived from producing lumber • Paper grade, debarked and screened bole chips produced from chipping pulpwood • Standard bole chips from chipping pulpwood • Re-screened whole tree chips Chip size and uniformity Consistent size of 2 ½” X 2 ½” X 5/8” or smaller; allowing efficient movement through augers and mechanical systems. No excessive “stringy” wood chips. Screening Screened to ensure the size required described above. Moisture Content Consistent with Class M35 with 30-45% moisture content (wet basis). No chips with excessive moistures (>50%). Chips shall be processed, stored and transported in a manner which protects chips from rain, snow and ice. Ash Content Ash content by weight required to be less than 3%. Type Chips shall be hardwood to ensure highest heat (BTU content); minimum 4900 Btu per green pound. Sugar, maple, oak, beech and yellow birch are preferred. No softwoods. No more than 5% of a load can be from Ash trees Cleanliness Free of dirt, rocks, metal, paints and other foreign material. Source All chips must be sourced from forestry activity or primary processing of timber. Absolutely no demolition debris is allowed.
