Statutory Recycled Content Verification in Single Site Chemical Recycling Operations
Statutory verification of recycled content in single-site chemical recycling requires mass balance boundaries, fuel exclusions, and batch loss accounting.
Allocation Model
Meaning
Mathematical frameworks distribute the environmental footprint or recycled content of shared processes across multiple outputs. An allocation model determines how mass or energy credits move from a feedstock pool to a specific grade of resin. This method defines the mathematical rules for assigning recycled mass to the final part.
Credit Distribution
Book and claim systems rely on these rules to maintain the integrity of green claims without requiring physical segregation of materials. Using an allocation model ensures that the total volume of recycled resin sold never exceeds the volume of waste plastic actually processed.
System Boundary
Physical realities often conflict with the desire for pure streams in complex chemical plants where various grades emerge from the same reactor. The allocation model provides a structured way to handle co-products and waste streams by splitting the burden based on mass, energy content, carbon intensity or market price. Because different standards favor different methods, the chosen approach dictates the final carbon score of the product.
Selecting a mass based approach typically yields a different result than an economic approach.
Verification Requirement
Third party auditors check the calculations against the actual throughput of the facility. Errors in this step lead to the loss of certification and potential legal liability for false marketing.