We are going to build an office space (5000ft2) within an industrial plant and will renovate completely and existing office building attached tho the industrial plant. The office space will use one existing wall of the plant and also three other walls from previous offices, also the roof will be existing. All the inner spaces and so the concrete slabs, including the slab on grade will be demolished to include the proper new foundations. So basically the main shell is going to be maintained. The question arises because we are planning to certify the building as NC 2009 and we don't know how the ESC plan was executed when they first built the existing space. Is it valid to do a new ESC plan since we will have to do some earth work inside the envelope to dig the foundations of the new structure? Does the ESC plan will have to include some measurements about dust coming out of the demolition process? Thanks.