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IN Ardaman & Associates , Inc . W00% January 16 , 2007 Proposal File No. 07-64-3135 4? Y j� Y F� ` lid ` � ti Ri a Indian River CountyL Oe " Board of County Commissioners Engineering Division 1840 25" Street Vero Beach , Florida 32960-3365 Attention : Ms . Michelle A . Gentile Subject : Proposal for Subsurface Soil Exploration and Geotechnical Engineering Evaluation 16`hStreet Bridge at 74th Avenue Indian River County, Florida Ladies and Gentlemen : As requested , we are pleased to present the following proposal for conducting a subsurface soil exploration and geotechnical engineering evaluation for the subject project. This proposal presents our approach to the project which was discussed with your project structural engineer, Bridge Design Associates , Inc. and includes an estimate of field exploration and laboratory testing quantities as well as geotechnical engineering services needed for the evaluation of the data obtained and preparation of a report . We understand that the project will consist of replacing the existing 16" Street bridge crossing over Rangeline Canal with a new bridge supported on prestressed concrete piles . The following summarizes our proposed scope of work and associated fees for conducting the subject exploration . FIELD EXPLORATION As requested , our field program will include conducting two Standard Penetration Test ( SPT) borings , one at each end of the proposed bridge over Rangeline Canal to a depth of 60 feet. The borings may be completed to shallower (or deeper) depths depending on the soil conditions encountered during the performance of the borings . The SPT borings will be drilled using a procedure similar to the Standard Penetration Test outlined in ASTM D- 1586 . The borings will be sampled at 18-inch or 24-inch intervals to 10 feet deep and at 5-foot intervals below 10 feet. Each sample will be removed from the sampler in the field and then examined and visually classified by our crew chief. Representative portions will be sealed and packaged for transportation to our laboratory for further analysis as required . Water level observations will be made in the boreholes during the drilling operation .