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EXHIBIT "A" PUMP STATIONS #1 AND #3 CITY OF REDWOOD CITY SCOPE OF SERVICES February 19, 2002 BACKGROUND The City is proposing to rehabilitate two existing sewage pump stations. Pump Station #1 is located at Twin Dolphin Drive and Marine Parkway. It receives sewage flows from one upstream pump station. The inflow pipe on the south wall of the wetwell needs to be grouted. The two pumps at Pump Station #1 need to be upsized to manage more flow. Additionally, the pumps need to be standardized to submersible types to handle pump failures more quickly. Pump Station #3 is located in Marlin Park at Bark and Trident Drives. Pump Station #3 has two pumps that receive sewage flows from six upstream pump stations. The pump station has deteriorated with age and is experiencing an increase in the frequency of repairs. The packing gland bolts on pump #1 are broken, so the pump must be removed and disassembled for repairs. The check valves on both pumps are either badly leaking or broken and are in need of replacement. The pump station drywell has groundwater leaking in from the floor plug. Rehabihtating these pump stations will eliminate these problems as well as provide standardized submersible pumps for easier preventative maintenance and quicker emergency response times. SCOPE OF SERVICES This Scope of Services provides for the preparation of design documents for the rehabilitation of the pump station. The following Tasks will be performed: Phase A. Project Management This task provides the overall management the project. The tasks include but are not limited to the following: · Providing project coordination, communicating project issues with the City of Redwood City, setting up the project including developing Nolte's project work plan, preparing a project design schedule as well as monitoring and updating that schedule, tracking and reporting job progress. · Perform Quality Control Reviews and Quality Assurance Audits of design. Phase B. Design Development Task 1. Preliminary Desi~ Perform hydraulic calculations. Deternfine pump station flows and compare with pump curves. Research existing utilities and show on site map. Perform one day of field surveying per pump station to establish inverts of pipes at existing manholes, as well as confirm locations relative to significant local features. The survey will augment and clarify utility information based on City provided as-built plans as well as locate existing structures and trees. During a site inspection pump data will be collected as well as pump cycle time measurements. This data along with and Sel!ings\pvl~ranle~santi\LllcaI Scttings'/Tenlporar~ lnterne~ Files\0LKI