Is corn grown on property? If yes, is it close to any of the produce.
Do you feed animals with corn on property? If yes, are they fed near any of the veggies.
Is any of their manure used on the veggies (or any manure at all)?
Can the animals potentially poop near the veggies (some farmers use corn fed chickens to keep pests down in the fields)?
Do you use compost or mulch with corn or corn stalks in it?
Do you use any sprays?
Do you use any gases?
Do you use any coatings?
Do you use any weed control (some organic places were using corn gluten to keep down weeds)?
Do you use any enzymes on the plants?
Do you use any soaps on produce?