for Highway Construction Page 587 of 715 SECTION 653 - RESERVED for Highway Construction Page 588 of 715 SECTION 654 – COMPOST
654.01 Description.
Provide and apply compost on dist urbed areas, which include areas within the right of way where existing vegetation has been removed or new construction areas, including haul roads. Contact the Engineer before applying compost. Apply as a temporary and permanent erosion control measure m eeting all applicable portions of 212.03.
654.02 Materials.
Provide compost homogeneous in color (e.g., dark loam), with an earthy smell (i.e., not odiferous), and that contains no visible straw or organic or inorganic trash (i.e., maximum of 0.5 percent plastic and less than 1 percent for other trash). Completely decomposed material will be evidenced by total breakdown of raw ingredients and lack of odor or heat generations (i.e., mature and stable exhibiting no anomalous hot -spots).
1.Solvita maturity tes ting: ammonia (NH3) and carbon dioxide (CO2) respiration or temperature self - heating tests (may not reheat to 66°F (20°C) above ambient temperature).
2.Combination evolution rate is greater than 6.
3.Conductivi ty testing is les s than 5 mmhos per centimeter and no greater than 15 mmhos per centimeter.
4.PH of 5.5 to 8.2.
5.Sieve testing requirements: must be friable and pass through a minimum 1 inch- screen.
6.Maximum nutrients allowable:
a.Nitrogen, total (TKN): 1.8 per cent dry weight.
b.Phosphorus total: 3.3 percent dry weight.
7.Maximum physical contaminants (i.e., manufactured manmade inerts):
a.Plastic: 0.5 percent dry weight.
b.Concrete: 1 percent dry weight.
c.Ceramics: 1 percent dry weight.
d.Metal: 1 percent dry weight.
e.Other: 1 percent dry weight.
8.Percent moisture allowable: 0 to 35 percent.
9.Must be certified noxious weed free. The supplier or the Idaho State Department of Agriculture (ISDA) Seed Laborator y will sample every 500 tons of c ompost. Compost tests will be completed and certified by a NAPT -PAP or an independent Seal of Testing Assurance Program -certified laboratory. The following labs are accredited to perform the required tests:
1.Stukenholtz Laboratory; Twin Fall s, ID.
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 623–623 of 768.