Specifications include, but are not limited to: The project consists of two large areas for replacement of interior and exterior concrete surfaces at the Metro Central Transfer Station. The interior and exterior areas cannot be worked simultaneously. The interior surface area is approximately 22,500 square feet with height limitations. The exterior surface area is approximately 7000 square feet. The actual square footage will be determined just prior to construction start for each area based on square foot unit prices for that specific area. The concrete slabs vary between 12 inches and 16 inches thick. Some areas have rebar. Some areas are expected to need subgrade replaced with geotextile fabric, 6 inch layer of ¾ inch minus crushed rock subgrade replaced and compacted. The bid schedule includes a line item for an estimated volume of subgrade replacement. This will be used for unit pricing the actual volume of subgrade material used. The site operates 363 days a year, so each repair area needs to be completed within the time constraints described for that area. The entire site surface is in use during normal operations. All vehicles and equipment will be staged off site until the work window starts. The trucking company that transports waste for Metro leases a parking lot adjacent to the site. Parking is available by arrangement with the trucking company. The outdoor area of approximately 7000 square feet shall be demolished and new concrete poured in one effort lasting four (4) days. A minimum of 4000 psi strength is required by the sixth day. The indoor area (Bay-2) of approximately 22,500 square feet must be done in one three (3) week window. To allow Metro early use of the conveyor, work shall start at the farthest interior end with replacement of the imbedded steel wear rails at the conveyor and proceed toward the open end of the building. The contractor shall remove the first eighty (80’) feet of the bay and then pour new concrete in that area before proceeding with the rest of the bay.