Standardized Product Definition and Product Testing Guidelines for ...

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6.3 Category B Test Requirements for Unprocessed Feedstocks
Category B Toxicant Assessment Tests shall follow the test frequency and reporting
requirements given above, with the following exception for unprocessed feedstocks:
If the initial Category B test results for biochar made from an unprocessed feedstock are all
within the Maximum Allowable Thresholds established by these Biochar Guidelines, then the
Category B tests may be repeated every three years rather than annually, as long as the
thermochemical production parameters and the feedstock composition all remain the same.
Figure 1, below, is a set of two process flow charts that compares the initial testing
requirements for all feedstock materials with the annual testing requirements, showing how the
exception for unprocessed feedstocks is incorporated.
Figure 1: Process flow charts showing testing protocols for initial testing and annual
testing of biochar materials.
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Standardized Product Definition and Product Testing Guidelines for Biochar That Is Used in Soil 18