25 May 2005
totally controlled by chemical treatment alone. One example is SS accumulation in a
cooling tower system. Chemical dispersants can aid in keeping SS from settling on
metal surfaces, but it may require adequate flow and physical removal to maintain good
Service Requirements. The SOW accurately describes the services to
be provided by the contractor. Service includes the frequency of on-site visits, the duties
to be performed, and the methods of reporting. The duties to be performed can include
these activities: water testing; making log entries; training; maintaining automated
chemical control and feed equipment; manual addition of chemicals to industrial water
systems; inventory control; corrosion coupon studies; microbiological population
determination; equipment inspections; laboratory support; quarterly reviews; and annual
Control, Feed, Monitoring and Sampling Equipment Requirements.
The SOW specifies what equipment, if any, is required to achieve consistent control of
the makeup water treatment chemical program. Automated control and feed equipment
is required on most medium and large cooling towers and on most steam boilers.
Automated control and feed equipment helps limit the demand for service maintenance.
To provide for the preparation of an appropriate SOW, engineering and facility
maintenance personnel carefully evaluate their capabilities in the area of water
treatment and water systems. Inadequate water treatment equipment can result in
higher service requirements or inconsistent control of the chemical program.
Descriptions of chemical applications can be found in Chapter 7.
Chemicals and Test Equipment. The SOW specifies any restrictions on
the use or discharge of chemicals. Examples of restrictions can include limitations on
the use of acid, shipping container size limits, microbiocide selection criteria, and
limitation on use of dry chemicals.
Quotation for Cost and Usage. The SOW specifies how the cost of
chemicals and services is being calculated and quoted. For example, quotations for
chemical treatment can be based on the cost to treat 3.785 cubic meters of water. Cost
for services in the SOW can be required to be included in the cost of chemical treatment
or quoted separately as line items, time, and materials. Contracts that require a "not-to-
exceed" quotation supply bidders with a not-to-exceed water usage estimate.
REPORTS AND AUDITS. Reports and audits are tools for documenting
performance and cost effectiveness of any industrial water treatment program. Audits
serve to verify results from the water treatment service company. Audits also serve to
verify the cost-effectiveness of product being supplied by the water treatment service
company. Audits are performed by qualified agencies within the military branch in
question or by independent consultants contracted to perform such duties.