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<br /> EXHIBIT IIAII <br /> REDWOOD CITY <br /> Proposal: Master Plan for Corrosion <br /> Proposal: Master Plan for Corrosion of Water Mains in <br /> Corrosion Zone 1 <br /> Task 1 - System Evaluation <br /> <br /> a) A review would be made of the historical information available for the City of Redwood City <br /> in terms of the history of corrosion control. Several key reports have been completed in the <br /> past which would be used as the basis of this review. <br /> b) As part of this review an inventory of storage tanks, pump stations, transmission and <br /> distribution pipelines 8 inches in diameter or more would be made. For the items listed below <br /> an inventory would be made of the existing systems and how they are functioning. <br /> a. Impressed Cathodic Protection Systems <br /> b. Electrical Continuity <br /> c. Rectifiers <br /> d. Galvanic Cathodic Protection Systems <br /> This information will be essential for the following risk assessment. <br /> c) Current requirement tests would be conducted at 18 locations within the distribution system <br /> to determine the possible condition of the buried hydrants, and valve assemblies and to estimate <br /> the amount of new anode material required to provide cathodic protection to the buried metallic <br /> plpl1lg. <br /> d) A review will be made of City leak records. This information will be factored into the decision <br /> making process along with other factors described below in terms of where corrosion control <br /> will be required and what the priority may be. <br /> e) Risk Assessment <br /> The consultant shall meet with the City to jointly develop a risk assessment plan which would <br /> list risk on one axis and consequence on the other axis. Each identified project would be listed <br /> and a cost benefit analysis would be completed for each project. The basic questions will be: <br /> What will it cost to do the project and what is the hard and soft value of the benefit derived? If <br /> the value of the cost over the benefit is equal to 1 or greater then the project has met the cost <br /> benefit criteria. <br /> ~ CONSULTING <br /> ., ENGINEERS, INC. <br /> Un! In('msimC/lI1'u Pr".;CI'/Üii,,1I <br /> 1 <br /> - <br />