SCOPE OF WORK   HEATING, VENTILATING AND AIR CONDITIONING SYSTEMS
CLEANING PROCEDURE

The following air conditioning systems Cleaning and Refurbishment Procedure description has been developed for the purposes of cleaning, sanitizing and remediation of the HVAC systems and ductwork of the buildings described in the Agreement, which incorporates this Scope of Work document.  The work performed by (“Contractor”) in accordance with the (NADCA) National Air Duct Cleaners Association Assessment, Cleaning, & Restoration of HVAC Systems ACR 2006 and The Institute of Inspection, Cleaning and Restoration Certification Standard S520 (IICRC S520).
 
This description outlines the procedures the Contractor shall employ in the cleaning and refurbishment of Air Handling Units and all associated air side supply air and return air ductwork.  The cleaning procedures shall cover the following equipment:
 All components of the airside surfaces of Air Handling Units.
 Airside surfaces of supply air ductwork, return air ductwork, outside air ductwork.
 Airside surfaces of all Variable Air Volume devices and mixing boxes.
 All supply air diffusers and return air grilles.
 Contractor Qualifications shall include at a minimum a Class A Certified Air Conditioning License for unlimited work in air conditioning issued by the State of Florida Department of Business and Professional Regulation.  A NADCA certified ASCS employee shall be on job site at all times during HVAC systems cleaning and refurbishment.
 Quality Control/Quality Assurance of work performance shall be guaranteed by the compilation of a photographic report at the end of the project. The photographs shall show the before cleaning and after cleaning conditions found in each air handling unit and associated ductwork. 
 

A.                                         In order to comply with OSHA Standards, General Industry 29 CFR 1910.147, “The Control of Hazardous Energy (Lockout/Tagout)”, Contractor shall incorporate all sections of the standard into the work plan for each area we work in.

 

B.                                         Contractor shall provide all labor, supervision, material, equipment and supplies necessary to clean, sanitize and refurbish the air conditioning systems and associated components.  All employees and individuals shall have received Respiratory Protection Training and Quantitative Fit Testing in accordance with OSHA’s Respiratory Protection Standard (29 CFR 1910.134). Contractor shall provide written proof of annual Certification testing for each employee by a Board Certified Industrial Hygienist.  In addition, Contractor shall provide written proof of annual compressive medical examination demonstrating employee pulmonary stress testing for respirator use.

 

C.                                        Prior to the cleaning and remediation, an evaluation shall be performed on the building and air conditioning system.  The air conditioning system shall be inspected for potential contaminates in the air stream of the building.

 

D.                                        Contractor shall thoroughly inspect and clean the inside of all Air Handling Units, all Variable Air Volume devices (VAV boxes), mixing boxes, all supply air ductwork, return air ductwork and outside air ductwork. It shall be Contractor’s responsibility to ensure that the ductwork and the inside of air handling units are not damaged or have defects.  If corrections are required, it shall be reported to the Owner’s representative.

 

E.                                         All surface areas, work stations, desks, chairs, counters and walking areas shall be covered with plastic sheeting before any ceiling panels are removed.  All work sites shall be cleaned up and debris removed at the end of work each day by Contractor.

 

F.                                         Contractor shall furnish Certificate(s) of Insurance which indicate that insurance coverage has been obtained which meets the requirement as outlined below:

 

A.     Worker’s Compensation Insurance for all employees of the Contractor as required by Florida Statute 440.  Bodily Injury by accident Insurance limits shall be $1,000,000  (Each Accident), and Bodily Injury by Disease shall be $1,000,000 (Policy Limit), and Bodily Injury by Disease shall be $1,000,000 (Each Employee).

B.     Public Liability Insurance on a Comprehensive basis in an amount not less than $1,000,000 and General Aggregate Limit of $2,000,000.  In addition, Products/Completed Operations Aggregate Limit of $2,000,000 and Personal & Advertising Injury Limit of $1,000,000.  Owner must be shown as an additional insured with respect to this coverage.

C.    Pollution Liability Insurance shall be required with a General Aggregate Limit of $2,000,000, Each Occurrence Limit of $1,000,000 and Contractor’s Pollution Liability-Occurrence of $1,000,000 in addition to Professional Liability Insurance Limits of $1,000,000.

D.    Automobile Liability Insurance and Uninsured Motorist Single Limit covering all owned, non-owned and hired vehicles used in connection with the work, in an amount not less than $1,000,000 combined single limit per occurrence for bodily injury and property damage.

 

The insurance coverage required above shall include those classifications, as listed in the standard liability insurance manuals, which reflect the operations of the Contractor.

 Installation of Access Doors:

A.                                        To ensure proper cleaning of the air handling units and ductwork, access panels and access doors will be installed at the required locations to gain service openings into the air handling units and ductwork.  Any and all access entries shall be fitted with insulated and hatched access doors or panels sealed with caulking and gaskets.

 

B.                                        Access panels or access doors shall be installed in supply ductwork within 4 to 6 feet from the air handling unit, and shall be between the air handling unit and the first set of turning vanes.  All cut or raw edges of fiberglass shall be sealed with duct mastic and then coated with an EPA registered antimicrobial protective coating.

 

C.                                        Access panels or access doors shall be installed at the discharge of the AHU to provide open access to the supply ductwork and discharge of the blowers for the purpose of inspecting and cleaning.

 

D.                                        Where applicable, an access panel or access door shall be installed in the return air plenum to provide access for inspection and cleaning of one side of the coil and in the first ten (10) feet of return air ductwork, face and by-pass dampers.

 

E.                                         Prior to gaining access or starting work inside the air handling units, the motor shall be de-energized as specified by OSHA requirements.  The air handling units shall then be put under negative pressure by a HEPA filtered negative air machine.  This negative pressure shall be maintained during the entire cleaning and decontamination procedure.  The negative air system shall be attached to the air conveyance system and shall remain in operation until no cleaning or antimicrobial protective coating  odors are detected in the exhaust air.

 Refurbishing Air Handling Units:
           

A.                                         The cleaning procedures shall include all components of the air handling unit, including but not limited to the coil, condensation pan, purging the condensate drain line, fan blades and housing, insulation, turning vanes and air handling unit vibration couplers.  Motors shall be covered during the cleaning to prevent contamination or water and chemical intrusion.

 

B.                                         The cleaning and decontamination procedures shall involve the following procedures.  After the air handling units and the ductwork have been properly accessed, the inside surfaces of these areas shall be HEPA vacuumed to remove any visible microbial growth and contaminant surface debris. Then Coil Cleaner shall be sprayed on both sides of the coils and then rinsed with a pressure rinse of at least 800 psi (unit ventilators and smaller fan/coil units shall be rinsed with less water and pressure).  The foaming coil cleaner shall be applied repeatedly until the foam rinses clean and white.  The coils shall be thoroughly rinsed and the condensate pan shall be cleaned and flushed after the foaming coil cleaner applications.

 

C.                                        The fan blades and inside of the fan housing shall also be cleaned with diluted coil cleaner and then flushed.  Contractor mechanics shall make a 1-1/2” hole at the bottom of the housing to provide drainage for the dirt and metal cleaner and water.  This hole shall be covered with a patch after the cleaning.  The condensate drain line shall be purged at this time.  The blower housing shall be painted with a rust inhibiting primer and coated with  an EPA registered antimicrobial coating.

 

D.                                        The drain pans shall be resurfaced with PANCRETE drain pan protective sealer.

 

E.                                         The undamaged fiberglass insulation lining the air handling unit cabinet panels shall be coated with an antimicrobial protective coating to seal and preserve the insulation.  The EPA registered antimicrobial coating shall be applied with an airless paint sprayer to provide a uniform film on the inside of the air handling unit and return air plenum.

 

F.                                         After the coil cleaning procedure and the fan blade cleaning, the coils and fan blades shall be thoroughly and evenly coated with a fine spray of coil sanitizer to prevent fungi growth.

 

G.                                        All exposed fiberglass insulation found damaged or torn shall be removed and replaced with IMCOA microbial resistant insulation liner inside air handling units.  The fiberglass insulation on the wet side of the coil shall be replaced with the IMCOA.  The IMCOA microbial resistant insulation liner shall be one (1) inch thick and meet ANSI/NFPA 90A and 90B flame spread and smoke development standards.  The new insulation shall be pinned and glued to the air handling unit cabinet panels per SMCNA standards.

        
Variable Air Volume Boxes/Mixing Boxes:
 

The air side surfaces of all VAV boxes and mixing boxes where applicable, shall be cleaned, sanitized and the fiberglass insulation liner coated with an EPA registered antimicrobial protective coating.  The disassembly of VAV boxes and Mixing Boxes shall be to the extent necessary to prevent damage to electrical components that cannot be shielded during the cleaning process and to provide adequate exposure to surfaces to be cleaned.