25B - AGMT - CENTENNIAL LAKE - Laserfiche WebLink

Home Browse Search

EXHIBIT A 2 Scope of Services Schedule Scope of Work Dudek will provide preliminary engineering services to collect and review existing background data. Data collection includes right -of -way documents, existing utilities plans, soils and geologic Information, "as- built" construction drawings for the lake, park and existing nearby utilities, existing hydraulic and master plans of drainage, irrigation plans, previous project reports, and proposed development plans. In addition, a field reconnaissance investigation of the project study area will be performed. The field investigation will include a verification of the site conditions and accuracy of the existing improvement plans. Soil Analysis • Excavate 5 small diameter borings to depths of 2 feet below the existing lake bottom. Borings depths of 2 feet are based upon the assumption that the sediment on the lake bottom is no more more than 1 -ft deep. We will geologically log the borings in accordance with USCS standards and will collect samples for laboratory testing. The borings will be backfilled with bentonite upon completion. • Perform laboratory testing which is anticipated to include grain size analyses, maximum density /optimum moisture, in -situ moisture and density, direct shear, compaction, permeability, and soil salinity. The laboratory test program will be determined based on soil conditions encountered during our exploration. • Prepare a written report presenting our findings and conclusions and recommendations regarding the proposed crossings, retaining (wing) walls, and pavement sections. De9lverable: Soil sample analysis results, narrative interpretation of relevant soil characteristics Water Quality Analysis Dudek will obtain lake water samples and have them tested in a lab certified by the California Department of Public Health. The lab will run a standard lake water quality test including: • Surface Dissolved Oxygen reading • Nutrients • -Total Phosphorus • Water Clarity Turbidity, Color, Total Dissolved Solids • Salts — Chloride, Conductivity • Acid /Base Readings — pH, Total Alkalinity, Total Hardness The test results will be used to provide physical indicators of specific problems with the lake water quality and markers for measurement of improvement of the lake water quality after rehabilitation of the lake. The lake water quality system will be designed to address the undesirable biological and chemical components identified in the lake water. Deliverable Water quality sample analysis results, narrative interpretation of relevant water quality characteristics M.1 t.)E K Centennial Park Lake Circulation and Aeration Study 11 25B -13