A. 
Wherever in these specifications the following terms, or pronouns in place of them, are used, the intent and meaning shall be interpreted as follows:
CONTRACTOR
Any individual, firm or corporation employed by a developer to complete work in a subdivision or contracted by the Town of Derry, New Hampshire.
DEPARTMENT
The Department of Public Works of the Town of Derry, New Hampshire, acting for the Town.
DIRECTOR
The Director of the Department of Public Works acting directly or through an authorized representative, such representative acting within the scope of the particular duties entrusted to him.
ENGINEER
The engineering technician in charge of construction inspections for the Town of Derry, New Hampshire, or his authorized agent or officer.
MATERIAL
Any substances proposed to be used in connection with the construction of any integral part and/or any appurtenant part and/or any incidental part of the proposed project.
SPECIFICATION
The directions, provisions and requirements contained herein, designated as the "Sewer Main Specifications," together with all written agreements made or to be made pertaining to the method and manner of performing the work or the quantities and qualities of materials to be furnished under these provisions.
TOWN
The Town of Derry, New Hampshire.
WORKS
All performance, including the furnishing of materials, labor, tools, equipment and incidentals, required of the contractor under the terms of these provisions.
B. 
The words "as directed," "as permitted," and "as required" or words of like effect shall mean that the direction, permission, or requirement of the Director is intended, and similarly the words "approved," "acceptable," and "satisfactory" or words of like import shall mean approved by or acceptable or satisfactory to the Director unless otherwise provided herein. The words "necessary," "suitable," and "equal" or words of like import shall mean necessary, suitable or equal in the opinion of the Director. The words "complete in place" shall mean the inclusion of the work, including incidentals, mentioned or implied in the specifications and on the plans, or work that may reasonably be inferred as necessary to the proper execution of the item, unless payment for any portion of the work is otherwise specifically provided for.
Whenever the following abbreviations are used in these specifications or on the plans, they are to be construed the same as the respective expressions represented:
AAN
American Association of Nurserymen.
AAR
Association of American Railroads.
AASHTO
American Association of State Highway and Transportation Officials.
ACI
American Concrete Institute.
AGC
Associated General Contractors of America.
AIA
American Institute of Architects.
AISC
American Institute of Steel Construction.
ANSI
American National Standards Institute.
ARA
American Railway Association.
AREA
American Railway Engineering Association.
ASCE
American Society of Civil Engineers.
ASLA
American Society of Landscape Architects.
ASME
American Society of Mechanical Engineers.
ASTM
American Society for Testing and Materials.
AWPA
American Wood Preservers Association.
AWS
American Welding Society.
AWWA
American Water Works Association.
DOT/FHWA
Department of Transportation, Federal Highway Administration.
FSS
Federal Specification and Standards, General Services Administration.
MUTCD
Manual on Uniform Traffic Control Devices.
NEMA
National Electrical Manufacturers Association.
NHDOT
The State of New Hampshire Department of Transportation.
RSA
The New Hampshire Revised Statutes Annotated, 1955, together with all revisions amending the same to the date of invitation for bids.
SAE
Society of Automotive Engineers.
SSPC
Steel Structure Painting Council.