NM CID MS-3 Practice Questions - New Mexico CID MS-3 Cesspools, Septic Tanks And Sewers Examination Exam

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Except for tanks approved with Type V concrete, the interior of a concrete treatment unit must be protected from corrosion by an approved bituminous coating or equivalent that extends:

Only across the underside of the cover To at least 6 inches below the waterline Only on the exterior sidewalls From grade down to the inlet invert only

Correct Answer:

To at least 6 inches below the waterline

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