Might help to know the form of your incoming beans - dry or canned? This will definitely drive the potential for potential hazards. Commercially canned beans have relatively low risk, but dry beans:
- physical - stones, bugs, twigs, etc.
- biological - salmonella and other pathogens...if the beans were improperly handled, dried, stored, or transported
- chemical - see TechnicalController's comment; pesticides if improperly harvested and processed
Particularly for dry beans, the relative risk of hazards will be very dependent on the quality of your supplier...
Edited by KTD, 14 January 2014 - 10:59 PM.