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EXHIBIT A Bi F Chu Chang ENGINEERS Redwood City Engineering Department 1017 Middlefield Road SURVEYORS Redwood City, California 94064 PLANNERS Subject: Proposal for water model upgrade Dear Chu, Pursuant to our meeting on March 7, 2003 or subsequent conversations, BKF is pleased to provide this proposal for upgrading the City water model The existing Redwood City water model simulates the water system east of the Carson Tank and Hetch Hetchy line. Based on our recent experience with the Marina Shores Village and Abbott Labs project, we understand the City's existing water model is currently a "skeleton" model. The model only includes 10" and bigger pipes of the water system. The model is made to simulate the overall behavior of the system. The City has expressed a need for a water model that is a better representation of the existing water distribution system. BKF proposes to increase the number of pipes of the water model and include more accurate information about the City's water demand. The following describes the approach proposed by BKF to upgrade the Redwood City water model The proposed scope of work includes upgrades to the existing water model and analysis of the water system performed through simulations ITEM A - MODEL NETWORK ($5,432) BKF will review the City's existing water model and provide upgrade to the model based on new improvements to the water line constructed since the last upgrade was completed. The City's has proposed to perform an overlay of the water system schematic map and the existing water model map to select supplementary pipes relevant to the analysis. Currently the existing model includes 312 pipes. BKF anticipates upgrading the water model with an additional 200 pipes. The City has provided the schematic map of the water system covered by the existing water model. The schematic map includes approximately 27 tiles of the City's infrastructures electronic format (AutoCad). This scope of work accounts for the manipulation of the tiles by BKF to create a schematic map of the studied area of the water system. The schematic map will be used as reference for the information required by the water model.