FROM: James D. Herberg, General Manager
Originator: Kathy Millea, Director of Engineering
SUBJECT:
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PLANT BOILER SYSTEM RELIEF AT PLANT NO. 2, PROJECT NO. FE18-15
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Receive and file Bid Tabulation and Recommendation for Plant Boiler System Relief at Plant No. 2, Project No. FE18-15;
B. Award a Construction Contract to Mehta Mechanical Company, Inc., dba MMC, Inc. for a total amount not to exceed $230,000; and
C. Approve a contingency of $34,500 (15%).
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BACKGROUND
The anaerobic digesters at Plant No. 2 are used to biologically stabilize and reduce the solids produced by treating wastewater. Under normal circumstances, the heat required to maintain biological process in the anaerobic digesters is recovered from the Central Generation engines. When the engines or the heat recovery system are unavailable, two auxiliary steam boilers are used instead. These two boilers have an operating permit from the South Coast Air Quality Management District that requires emissions testing every six months whether the boilers are used or not.
RELEVANT STANDARDS
* Comply with environmental permit requirements
* Commitment to safety & reducing risk in all operations
* Comply with California Public Contract Code Section 20103.8, award Construction Contract to lowest responsive, responsible bidder
PROBLEM
Mandatory emissions testing for the auxiliary steam boilers requires the boilers to produce more steam than can be used, which requires the release of steam to the atmosphere. There is, however, no provision for the safe release of steam. To conduct the testing, staff opens a manual valve in the steam line in the tunnels. This creates a safety issue for the person opening and closing the valve and releases a large amount of hot steam and high-pitched noise in the area.
PROPOSED SOLUTION
Award a construction contract for Plant Boiler System Relief at Plant ...
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