Plumbing Scope

I have reviewed the scope with a plumbing contractor and we have more unknowns, which could turn into nasty surprises. The property manager/owner does not have blueprints or as-builts of the existing utilities. We know there is a waste water main under the concrete slab, but we don't know what size it is, exactly where it is, or how deep it is. This could have major implications for our plumbing scope. If it is too high, we will have to run our waste to a sump and pump it to the waste water main. If it is too small, we would have to cut up the concrete slab over the main and replace it with a larger pipe. I'm hoping to find that it is at least a 4" main. We also need to install a grease trap per Regional Bldg Dept, but I have to determine what size, which components need to go through it, and if it can be inside. All of the coffee shop grease traps I've seen have been inside, but Canyon City, Colorado (different county) is now requiring grease traps to be outside. If that is the case, we are dead in the water. Our outside is over 100' away. It would cost a small fortune to trench the concrete and lay a new line running 100'. I have not heard of a similar requirement in El Paso County. This could be an insurmountable problem for us if it applies...

I will keep working these issues and find answers/solutions, and I'm praying that we don't find anything that will be a deal breaker.