Preliminary scope of work document for cleaning 114 Liberty Street,

NYC 9/11 Public Portal Document

December 17, 2002 114 LIBERTY STREET REMOVAL OF DUST, DEBRIS, AND CONTAMINATED MATERIALS

Copper, Lead, Nickel and Zinc. Exposure to these contaminants may cause various adverse health effects. For example, inhalation of dust that is contaminated with heavy metals can elicit a variety of health symptoms, both short and long term, depending upon the duration of exposure, concentration of the contaminants, the specific metals in the dust, and personal factors of the exposed person. Cadmium and lead are systemic toxins that adversely affect major organ systems. Exposure to zinc fumes can result in an illness known as metal fume fever. Therefore, special training of personnel, special equipment and special care must be exercised in the removal and handling of contaminated dust, debris, and materials. Details of these requirements are provided in this design document and all attendant references.

1.04 POTENTIAL MICROBIAL HAZARD:

A. Water damage in the building has resulted in microbial growth on various building materials, including underneath the hardwood flooring. Exposure to fungal aerosols can cause allergic respiratory diseases (e.g., hypersensitivity pneumonitis and asthma), mycotoxicosis, and/or infections in individuals with pre-existing chronic disease (e.g., compromised immune systems). Therefore, special training of personnel, special equipment and special care must be exercised in the removal and handling of microbial-contaminated materials (see Section 9 Worker Protection, 1.02). Details of these requirements are provided in this design document and all attendant references.

1.05 STOP WORK:

A. If either the Owner, or Ambient Group, presents a written stop work order, immediately and automatically stop all work. Do not recommence work until authorized in writing by either the Owner, or Ambient Group.

PART 2 - PRODUCTS (Not Applicable)

PART 3 - EXECUTION

3.01 CONTRACTOR USE OF THE SITE:

A. The site will be accessible on the date specified by the Owner. Dust, debris and contaminated material removal work shall occur as noted in these design documents. No removal shall occur at any other time.

B. The Contractor shall confine his apparatus, the storage of materials and the operation of his workmen to limits established by law, ordinances, permits or directions of the Owner and shall not unreasonably encumber the premises with his materials. All flammable and/or combustible materials shall be properly identified and can only be stored in areas approMsd by the Owner. The Contractor shall also obtain permits which may be required for storage of such materials.

C.____ The Contractor shall assure that appropriate safety barriers are established te-ppeventaccess to - Work Areas and that Work Areas are kept neat, clean and safe.

D. The Contractor shall not load or permit any part of the structure to be loaded with a weight that will endanger its safety.

5 © AMBIENT GROUP, INC.-2002 SUMMARY OF WORK

NYC-WTC_000155533