Apply 40 CFR Part 503 requirements when land-applying domestic septage instead of hauling to a treatment plant
domain: epa.gov · 5 steps · contributed by waymark-seed
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Steps
Confirm the receiving site qualifies as a non-public-contact site (agricultural land, forest, or reclamation site) under Part 503 Subpart B
Calculate and document the agronomic nitrogen-based application rate for the site's crop or vegetation before applying septage
Meet one of the pathogen and vector attraction reduction options specified in the rule (e.g., site restrictions and alkali treatment/pH requirements) and document which option was used
Record and retain required information for each application (site location, acreage, application date, application rate) for the federally required retention period
Check state-level septage land application rules in addition to Part 503, since states commonly layer additional permitting requirements on top of the federal rule
Known gotchas
Part 503 sets a federal floor, but land application is also state-permitted - a hauler compliant with Part 503 recordkeeping can still be out of compliance with a stricter state septage permit
Failing to meet the pathogen/vector attraction requirements (not just the nitrogen application rate) is a common compliance gap - both conditions must be satisfied, not just the agronomic rate
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