Basement Slab Lowering

I need to lower part of my basement slab to increase ceiling height. The existing slab is solid, but some has already been removed for a separate project, so the remaining slab may need to be assessed for stability.

Key Requirements:
- Lowering the slab in a specific area
- Assessment of soil conditions and groundwater
- Professional handling of potential challenges

Ideal Skills and Experience:
- Experience with concrete work and slab modification
- Knowledge of soil and groundwater impact on construction
- Ability to assess and ensure structural integrity