ISO 22095 Mass Balance Chain of Custody Audit Requirements
ISO 22095 mass balance audits demand strict site boundaries, verified baseline yield conversions, and zero negative credit balances across accounting periods.
Weighbridge Weigh Records
Meaning
Industrial mass documentation records gross and net weights of bulk transport vehicles carrying raw plastic materials or scrap streams. Maintaining weighbridge weigh records establishes the primary mass baseline for inventory accounting and mass balance chain of custody tracking in polymer processing facilities. These records govern raw material intake accounting and freight billing in manufacturing plants.
Their authority covers incoming and outgoing vehicle shipments and ends at internal material transfer points inside processing plants.
Mass Balance Audit
Recycling certification standards require verifiable weight documentation for all incoming post-consumer plastic waste loads. Auditors inspect weighbridge weigh records to verify net scrap tonnage delivered against finished recycled resin batch outputs. Discrepancies between gate weight logs and production output yield calculations signal material loss or fraud.
Operational Inventory
Bulk railcars and silo trucks transfer dozens of tons of plastic pellets into storage hoppers daily. Plant managers crosscheck weighbridge weigh records against supplier certificates of analysis to catch short shipments before unloading raw material. Calibration drift on heavy scale platforms leads to balance sheet errors and incorrect batch formulation ratios.
Legal Traceability
Certified scale tickets provide legally defensible proof of delivery during commercial disputes over bulk resin quantities. Archiving weighbridge weigh records ensures full compliance with customs and transport regulations. Missing weigh slips expose resin compounders to tax penalties and loss of sustainability certifications.