Construction requirements for compost blanket application
Link to this table
|Parameters1,4||Reported as (units of measure)||Filter Berm to be Vegetated||Filter Berm to be left Un-vegetated|
|pH2||pH units||6.0 - 8.5||N/A|
|Soluble Salt Concentration2 (electrical conductivity)||dS/m (mmhos/cm)||Maximum 5||N/A|
|Moisture Content||%, wet weight basis||30 – 60||30 – 60|
|Organic Matter Content||%, dry weight basis||25 – 65||25-100|
|Particle Size||% passing a selected mesh size, dry weight basis||
|Stability3 Carbon Dioxide Evolution Rate||mg CO2-C per g OM per day||< 8||N/A|
|Physical Contaminants (man-made inerts)||%, dry weight basis||< 1||< 1|
1Recommended test methodologies are provided in Test Methods for the Examination of Composting and Compost (TMECC, The US Composting Council)
2Each specific plant species requires a specific pH range. Each plant also has a salinity tolerance rating, and maximum tolerable quantities are known. When specifying the establishment of any plant or turf species, it is important to understand their pH and soluble salt requirements, and how they relate to the compost in use.
3Stability/Maturity rating is an area of compost science that is still evolving, and as such, other various test methods could be considered. Also, never base compost quality conclusions on the result of a single stability/maturity test.
4Landscape architects, plant specialists and project (field) engineers may modify the allowable compost specification ranges based on specific field conditions and plant requirements.