They’re referring to a level IV or V system. They’re used when the ground doesn’... | Hacker News

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		thedougd on Nov 1, 2022 \| parent \| context \| favorite \| on: The McMurdo Wastewater Treatment Plant They’re referring to a level IV or V system. They’re used when the ground doesn’t perc well.

xxpor on Nov 1, 2022 [–]

I think the inspection requirement is fairly new, and only kicks in with new systems. That being said, at this house the water table is quite high. The well serving the house is only about 90 ft deep.

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