STA Feedstocks
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Here are descriptions of feedstocks that could be used to create compost. Disclosing these to customers is a requirement for every STA Certified Compost product in the STA program.



Leaves: From seasonal leaf fall or from cutting, pruning or raking. Can be one or more of the following: loose leaves, straw, and pine straw.


Yard Waste (Green Waste): Leaves, grass clippings, brush, garden materials, tree trunks, tree stumps, holiday trees, and pruning’s from trees or shrubs. Can also include vegetative materials resulting from the use of commercial products, including but not limited to discarded flowers, potted flowers, or grave blankets that do not include plastic, metal, polystyrene foam, or other non-biodegradable material.


Crop Residues: Materials generated by the production, harvesting and processing of agricultural or horticultural plants. These residues include but are not limited to stalks, stems, leaves, seed pods, husks, bagasse, and roots.


Tree Trimmings: Cuttings from trees, tree limbs, shrubs or brush that has been cut by residences, commercial tree trimmers and/or commercial lawn care services.


Silviculture Waste: Residuals and by-products of cutting trees, including but not limited to tree stumps, sawdust, pallets, and dimensional lumber that has not been treated chemically or with adhesives and coatings such as paint, glue, or any other visible contaminant.


Bovine Manure: Cow dung, also known as cow pats, cow pies or cow manure, is the waste product of bovine animal species. These species include domestic cattle and bison.


Horse Manure: Horse excreta used as fertilizer. The excreta usually accompanied with litter material.


Poultry Manure: Poultry manure or chicken manure is the organic waste from poultry composed of mainly feces and urine of chickens. The mixture of poultry manure with spilled feed, feathers and bedding materials like wood shavings or sawdust is referred as poultry litter. The composition and quality of a poultry litter varies with the types of poultry, types of litter used, diet and dietary supplements, and collection and storage of the litter.


Food Scraps: Pre-and post-consumer food discards from households and the commercial/institutional sector including but not limited to vegetables, fruits, grains, dairy products, meats, and compostable foodservice ware/packaging that may be commingled.


Compostable Products: Containers, films or foodservice ware such as bowls, plates, cups, cutlery, composed of materials such as vegetable matter, paper, cardboard, and plastics that meet Biodegradable Products Institute (BPI) ASTM D6400, D6868. These products should be labeled in accordance with the USCC Labeling Guidelines.


Industrial By-products: Organic materials generated by manufacturing or industrial processes that are non-toxic, non-hazardous, contain no domestic wastewater, and pass the paint filter test. Non-organic industrial by-products such as clay and gypsum shall be considered upon request.


Biosolids: Solids derived from primary, secondary or advanced treatment of sanitary wastewater that have been treated through one or more controlled processes that significantly reduce pathogens and reduce volatile solids or chemically stabilize solids to the extent that they do not attract vectors.


Other: Materials not defined above.  Please describe.