AASHTO MP 10-03 pdf free download

AASHTO MP 10-03 pdf free download.Compost for Erosion/Sediment Control (Compost Blankets).
3.2. Compost may be derived from a variety of feedstocks, including agricultural, forestry, food, or industrial residuals; biosolids (treated sewage sludge); leaf and yard trimmings: manure; tree wood; or source-separated or mixed solid waste.
3.3. Proper thermophilic composting, meeting the U.S. Environmental Protection Agency’s definition for a “process to further reduce pathogens” (PFRP), will effectively reduce populations of human and plant pathogens, as well as destroy noxious weed seeds and propagules.
3.4. Compost is typically characterized as a finely screened and stabilized product that is used as a soil amendment. However, most composts also contain a wood-based fraction (e.g., bark, ground brush and tree wood, wood chips, etc.) which is typically removed before use as a soil amendment. This coarser, woody fraction of compost plays an important role when compost is used in erosion and sediment control. It is even possible to add fresh, ground bark or composted, properly sized wood-based material to a compost product, as necessary, to improve its efficacy in this application.
3.5. Compost products acceptable for this application must meet the chemical, physical, and biological parameters outlined in Section 4.
4. CHEMICAL, PHYSICAL, AND BIOLOGICAL PARAMETERS
4.1. Compost products specified for use in this application are described in Table 1. The products’ parameters will vary based on whether vegetation will be established on the treated slope.
4.2. Only compost products that meet all applicable state and federal regulations pertaining to its production and distribution may be used in this application. Approved compost products must meet related state and federal chemical contaminant (e.g., heavy metals, pesticides, etc.) and pathogen limit standards pertaining to the feedstocks (source materials) in which they were derived.
4.3. Very coarse compost should be avoided if the slope is to be landscaped or seeded, as it will make planting and crop establishment more difficult.
4.4. In regions subject to higher rates of precipitation andlor rainfall intensity, higher compost application rates should be used. In these particular regions, as well as regions subject to wind erosion, coarser compost products are preferred.
Note 1—Specifying the use of compost products that are certified by the U.S. Composting Council’s Seal of Testing Assurance (STA) Program (www.compostingcouncil.org) will allow for the acquisition of products that arc analyzed on a routine basis, using the specified test methods. STA participants are also required to provide a standard product label to all customers, allowing easy comparison to other products.
Where water quality is an issue, or in areas in proximity to sensitive water bodies, the appropriate compost product should be used, and vegetating the compost blanket should be considered.
5. FIELD APPLICATIONS
5.1. The following steps shall be taken for the proper installation of compost as a soil blanket for erosion/sediment control on sloped areas.
5.1.1. Slightly roughen (scarify) slopes and remove large clods, rocks, stumps, roots larger than two inches in diameter, and debris on slopes where vegetation is to be established. This soil preparation step may be eliminated where approved by the Project Engineer or Landscape.
5.1.2.1. Compost blanket application rates should be modified based on specific site (e.g., soil characteristics and existing vegetation) and climatic conditions, as well as particular project- related requirements. The severity of slope grade, as well as slope length, will also influence compost application rates.AASHTO MP 10-03 pdf download.