KIMLEY-HORN AND ASSOCIATES - 2018

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Kimley>»Horn Warner Avenue Street Improvements 1/10/2018 Deliverables: Utility agency tracking List, utility notification letters. Task 3: Geotechnical Study Infiltration Test and Soil Suitability: Our team will conduct a geotechnical field review as follows: • Percolation rate test at eight locations to the depth of 8 feet • Agronomy/soil fertility laboratory testing encompassing major element fertility package, agricultural suitability package, and USDA particle size analysis • One hollow stem auger boring to the depth of approximately 50 feet bgs and two CPT to a maximum depth of 50 feet bgs or refusal • Obtain bulk, soil samples at selected depths We will compile data and geotechnical analysis of the field and laboratory tests consisting of analyses to evaluate and provide recommendations pertaining to the following: • Percolation rate characteristics of the soils • Grain Size Distribution and Atterberg Limits/Plasticity Index Moisture content • Suitability of the on -site soils for landscape improvements We will prepare a report presenting the results of field exploration, geotechnical laboratory testing, engineering analyses, as well as conclusions and recommendations relative to the project. Soil management report will address the recommendations for amendments for optimum soil for plantings. Pavement Evaluation: We will provide the following services: • Subsurface exploration consisting of the excavation, sampling, and logging of six hand excavated cores to depths of approximately five feet, or refusal within the project limits. The purpose of the pavement borings will be to observe the existing structural pavement sections and collect soil samples for geotechnical laboratory testing. Our team will compile data and geotechnical analysis of the field and laboratory tests with analyses to evaluate and provide recommendations pertaining to the following: • Evaluate the R-value and in -place moisture content of subsurface soils. • Evaluate Expansion Index and Corrosion potential of subsurface soils. • Excavation and compaction requirements, including suitability of the on -site soils for subgrade material for the proposed improvements. • Analysis and design of new pavement construction and pavement rehabilitation alternatives. The analysis will be performed in general accordance with the Caltrans Highway Design Manual design method. • Provide recommendation for sidewalk improvement. We assume that the 10- and 20-year design traffic indices (TI) for the subject streets will be provided to us by the City for our analyses. We assume traffic control for pavement borings and percolation tests will be based on Work Area Traffic Control Handbook (WATCH) manual. 2 1 P a g e