RES 88227 - Laserfiche WebLink

BISSELL& KARN. INC. Job #8704139.40 May 5, 1988 Page 2 This scope of work is based on pre-ordering the new pum~s in order to complete the project as cjuickly as ~ossSble. Depending on the results of the first task, this may or may not be desirable. If the urgency of the project is reduced, the total project cost could be reduced by not pre-ordering the pum~s. SCOPE OF WORK Task I. Test Existing Pu~ Station. The impetus for teloration and replacement of the Foothill #1 Booster Station is that, when Sycamore Reservoir comes on line, it will be desirable to switch the main in Foothill Road between Sunol Boulevard and Bernal Avenue to the Eower Zone. When this is done, the available suction head for Foothill #1 will be reduced by about 30 feet, which may or may not cause pump operating problems. In this task, we would assist the City in conduct- ing a test to determine how much the pump suction head can be reduced and continue satisfactory operation. This will determine whether or not the main in Foothill Road can be switched to the LoWer Zone before the new pum~ station is completed. This in turn will determine how critical it is to complete the design and construction of the new pump station. Task II. Pre-Design. Sizing of this pump station has been addressed in the Billside Pressure Zones Master Plan an~ several letter reports by the developer's consultant. However, there are some discrepancies in the numbers of dwelling units between the various reports. These need to be resolved in order to make the final determination as to the size of the pump station. Similarly, there are a number of other design criteria that should be established prior to starting final design. The purpose of this task would be to establish all necessary design criteria for the proposed pump station and to select a specific site. We would also review the desirability of using the existing pump in the new pump station. All of the relevant design criteria would be su~aerized in a brief report and reviewed with City staff, along w~th the preliminary layout, prior to initiating final design. Specific tasks would include: o Site selection. o Review of projected landuse and determination of the necessary flow and head recjuirements for the pumps. - o Establish telemetry and control requirements. o Determine sizing of all components of the pum~ station and connecting piping. WDP.8.27