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APPENDIX 1 UTILITIES AND SERVICE SYSTEMS SCOPE OF SERVICES CITY OF REDWOOD CITY FEBRUARY 27, 2006 . Emergency operating conditions with domestic flow and fire flow, without Hetch-Hetchy water lines. . The results of the water system analysis will be summarized in a memorandum submitted to the City for review and comment. Task 5 - Sewer System Analysis Nolte will evaluate the capacity of the downstream transmission facilities for wet weather flow, from the City's Downtown Plan to the SBSA Treatment Facility. The Haestead program SewerCAD will be used. The sewer capacity purchased by the City will be confinned to ensure that there is adequate capacity for the proj ect. The results of the sewer system analysis will be summarized in a memorandum submitted to the City for review and comment. Task 6 - Stormwater System Analysis The data on the existing system will be entered into Haestaed's StonnCAD. It is not the intent of this task to model all of the pipeline components, but rather to verify the previous work done in the stonn drainage master plan. The existing transmission capacity and conditions will be evaluated. Changes in land use and thus, runoff coefficients, will be modeled and compared with the existing conditions. Recent regulations are changing how the engineering community looks at stonn water quality. Nolte's recent experience leads us to believe that starting at the source is critical for any significant project. This means effective management and minimization of change to impervious areas. Another significant element is maximizing the use of grassy swales and other surface flow components to achieve treatment. These options are, however, limited by the orientation and topography of the site. The feasibility of using onsite or regional treatment will be evaluated. Nolte has found that selective use of "regional" treatment facilities may offer a very cost effective means of developing treatment capacity for redevelopment projects. These treatment facilities can be made available to the redevelopment projects for a share in the cost. Nolte has also found that structural stonn water treatment units can provide some significant benefits at a reasonable cost with relatively small use of land. Lastly, the use of basins for treatment or modification of existing basins to provide treatment must be done very carefully. Capacity that is required for treatment may not be available for peak attenuation and flood prevention. The results of the storm system and water quality analysis will be summarized in a memorandum submitted to the City for review and comment. Task 7 -Identify Impacts to Utility Systems After the analyses for each of the utility systems is completed, the results must be processed and evaluated. Nolte will identify impacts to the water supply, sewer collection, stonn water I'JC:)[TE 3 of9 B'YOND ENGONE'RONG N:\BDNCS\Redwood City\Downtown Precise Plan\Delv\Final Scope - Ver 2_02-28-06.doc