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Ardaman &: Associates , Inc . November 29 , 2012 Ardaman Proposal No. 12-3836 Geotechnical. Environmental and Revised January 14, 2013 - Materials Consultants Indian River County Engineering Division 180127 1h Street Vero Beach , Florida 32960-3388 Attention : Mr. Arjuna Weragoda , P . E . Subject: Proposal for Preliminary Contamination Assessment Intersection of State Road 60 (20th Street) and 43`d Avenue Indian River County, Florida Mr. Weragoda : As requested , Ardaman & Associates , Inc. (Ardaman ) has prepared a scope of work and estimation of costs related to performing a preliminary assessment of subsurface contamination at the above referenced site . This proposal includes soil and groundwater sampling and testing to explore for the presence of soil and/or groundwater contamination along areas of the project site relative to several potential sources of contamination identified as a result of a contamination screening evaluation . that was performed by others . If additional sampling and testing is necessary, then additional work beyond the limited scope of work outlined herein will be proposed . BACKGROUND INFORMATION Indian River County plans to improve the intersection of State Road 60 (20th Street) and 43`d Avenue in Indian River County, Florida . The proposed improvements include widening of the roadways from the existing four-lane to provide for a six-lane divided roadway with median , curb and gutter on the median side and resurfacing of the existing pavement. Arcadis completed a Contamination Screening Evaluation Report ( CSER) for the project study area in February 2007 . The project study area extends up to the existing bridge over the Main Relief Canal to the north and west and for approximately 2 ,200 feet to the south and east from the intersection . The purpose of the CSER was to identify and evaluate sites with known or potential for contamination within the project study area . Twelve sites were identified in the CSER as having "medium" and "high" potential for contamination . Based on the results of the CSER, limited soil and groundwater assessment in the right-of-way expansion areas adjacent to sites ranked as "high" and "medium" was recommended . In addition , discussions with Indian River County staff indicated that construction activities associated with the proposed roadway improvements such as underground utility installations , dewatering , etc. also need to be considered within the existing right-of-way areas where no right-of--way expansion is planned . PROJECT APPROACH The following scope of work describes the tasks necessary to preliminarily explore for the presence of contamination in soils and groundwater in the limited areas of the project study area , specifically at locations adjacent to the sites identified in the CSER as having "medium" and "high" potential for contamination . We note that the project limits have been reduced to the north and west ; and therefore , additional exploration relative to the Keith 's Oil Can , Brook's Residence and the Dodger Pines Country Club sites will not be included in this study. 460 NW Concourse Place, Unit 1 , Port St, Lucie, Florida 34986 Phone (772) 878-0072 Fax (772 ) 878-0097 Florida : Bartow, Cocoa, Fort Myers, Miami, Orlando, Port St. Lucie, Sarasota , Tallahassee, Tampa, West Palm Beach Louisiana: Alexandria , Baton Rouge, Monroe, New Orleans, Shreveport