Page 51 - Water and Wastewater Engineering Design Principles and Practice

1-22 WATER AND WASTEWATER ENGINEERING

The contractor and/or the engineer may be responsible for the “as-built” drawings. This respon-
sibility should be clearly indicated in contract documents or the engineer’s scope of work. The
accuracy of as-built drawings is increased substantially if they are prepared as the work progresses
rather than after it has been completed.

Preparation of the Operation and Maintenance Manual
The engineer or the contractor may be responsible for preparing the operation and maintenance
(O&M) manual. Even for a small plant, the O&M manual addresses a large number of items.
A small set of examples include: start-up and shut-down of pumps, preventive maintenance for
pumps and compressors, sampling and analysis methods to meet permit requirements, opera-
tion of analytical equipment in the laboratory, emergency procedures in the case of equipment
failure, methods for repair of equipment or procedures for obtaining repair services, procedures
for weatherproofing equipment for winter, building maintenance, sewer maintenance, and other
appurtenances. The O&M manual may also include a computer-based management system (often
called an asset management system ) for maintaining records of preventive maintenance, repair,
and replacement.
Work on the manual must be complete before start-up and shake-down can commence be-
cause “testing” of the manual is part of the start-up and shake-down.

Start-up and Shake-down
When the facility construction is substantially complete and functional, the permitting authority
issues a discharge permit. At this point equipment can be started up and checked for perfor-
mance. The contractor and equipment manufacturers perform the start-up. Routine and non-
routine operation is checked for each individual component and for the components working
together. The engineer provides inspection services to verify that the equipment works as speci-
fied and that the O&M manual is adequate.

Acceptance of the Project
Substantial completion. When the contractor considers the entire work ready for its intended
use, the engineer in company with the owner and contractor performs an inspection to deter-
mine if the work is substantially complete. A “punch list” of deficiencies is created during this
inspection. If after considering any objections of the owner, the engineer considers the work
substantially complete, he/she delivers a Certificate of Substantial Completion to the owner and
contractor.

Final Notice of Acceptability. The contractor then uses the punch list for final completion of
the work. Once the punch list is completed, the engineer conducts a final inspection to determine
if the completed work of the contractor is acceptable. If he/she agrees that it is, the engineer
recommends final payment to the contractor. In addition, the engineer provides a Notice of
Acceptability of Work to the owner that certifies that the completed work furnished and per-
formed by the contractor under the contract is acceptable (EJCDC, 2002). The notice is not a
guarantee or warranty of the contractor’s performance nor is it an assumption of responsibility
for any failure of the contractor to furnish and perform the work in accordance with the contract