Diving Inspection and Cleaning of Potable Water Tanks

It is anticipated that at least twenty-four (24) water storage tanks (located at 14 different facilities) will be cleaned under this contract. Orange County currently has two types of water storage tanks: twenty-three (23) above grade and one (1) below grade. Above grade tanks are cylindrical and range in height from 19’ to 40’ above grade. The below grade tank is rectangular in shape and is 20’ below grade. Orange County reserves the right to postpone cleaning of any or all water storage tanks if weather conditions, fire hazard or operational needs dictate. Orange County reserves the right to delay the cleaning of any storage tank if conditions warrant such action at that water storage site. The water storage tanks shall be cleaned and inspected by certified divers while they are in service. The Contractor shall provide all labor, equipment, and materials necessary to provide vacuum cleaning of the tank, The Contractor shall provide certified water health analysis, and disposal of liquid material removed from each water storage tank, and disposal of solid materials removed from each water storage tank. The Contractor shall dispose of sediment in accordance with all applicable laws and regulations. Upon completion of the cleaning and inspections, the Contractor shall provide a written insured report documenting the findings during the inspection, and an album of photographs, both underwater and above the water surface of the tank interior, to include the dome and showing before and after photos of each tank. Photographs of the tank exterior after cleaning shall be included. Report and photo albums shall be in both electronic and hard copied format as specified herein.

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 03 -	Concrete, Concrete Reinforcing, Cast-in-Place Concrete.
Division 05 -	Metals, Structural Metal Framing, Metal Decking.
Division 23 -	Heating, Ventilating, and Air Conditioning (HVAC), Facility Fuel Piping, Facility Fuel-Storage Tanks.
Division 31 -	Earthwork, Clearing and Grubbing, Grading.
Division 32 -	Exterior Improvements, Fences and Gates.
Division 33 -	Utilities, Storm Drainage Utilities.