J-mech, I recall some of the articles I've read to have explained that no contamination can enter through the roots into the plants, but the concern is with root plants like carrots, and vegetables that may lay on the ground, like melons, getting bacteria on them from contacting the dirt containing the bacteria. In this case the bacteria would be on the veggies instead of actually in them. Something else to consider is the chemicals and cleaners that run through a septic tank, but that concern was rarely raised in what I've read.
It seems like there would be an amount of time that could pass that would allow my dirt to be 100% free from septic bacteria since the field isn't used anymore, but I haven't came across that information.
Most of what we will grow will lay on the ground, that's why I'm concerned of contact bacteria.
And hurting the leach bed lines isn't a concern of course.
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One lonely old 1541, 3pt, Brinly plow and cultivator.
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