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EWV Ardaman & Associates, Inc. November 29, 2012 <br /> Ardaman Proposal No. 12-3836 <br /> Revised January 14, 2013 <br /> Me% Geot�r,Y;nirat;Fr•;iroranental slid <br /> MaterialConsultants <br /> `ww <br /> Indian River County <br /> Engineering Division <br /> 1801 27th Street <br /> Vero Beach, Florida 32960-3388 <br /> Attention: Mr. Arjuna Weragoda, P.E. <br /> Subject: Proposal for Preliminary Contamination Assessment <br /> Intersection of State Road 60 (20th Street) and 43`d Avenue <br /> Indian River County, Florida <br /> Mr. Weragoda: <br /> As requested, Ardaman & Associates, Inc. (Ardaman) has prepared a scope of work and <br /> estimation of costs related to performing a preliminary assessment of subsurface contamination <br /> at the above referenced site. This proposal includes soil and groundwater sampling and testing <br /> to explore for the presence of soil and/or groundwater contamination along areas of the project <br /> site relative to several potential sources of contamination identified as a result of a contamination <br /> screening evaluation that was performed by others. If additional sampling and testing is <br /> necessary, then additional work beyond the limited scope of work outlined herein will be <br /> proposed. <br /> BACKGROUND INFORMATION <br /> Indian River County plans to improve the intersection of State Road 60 (20th Street) and 43rd <br /> Avenue in Indian River County, Florida. The proposed improvements include widening of the <br /> roadways from the existing four-lane to provide for a six-lane divided roadway with median, curb <br /> and gutter on the median side and resurfacing of the existing pavement. Arcadis completed a <br /> Contamination Screening Evaluation Report (CSER)for the project study area in February 2007. <br /> The project study area extends up to the existing bridge over the Main Relief Canal to the north <br /> and west and for approximately 2,200 feet to the south and east from the intersection. The <br /> purpose of the CSER was to identify and evaluate sites with known or potential for contamination <br /> within the project study area. Twelve sites were identified in the CSER as having "medium" and <br /> "high" potential for contamination. <br /> Based on the results of the CSER, limited soil and groundwater assessment in the right-of-way <br /> expansion areas adjacent to sites ranked as "high" and "medium" was recommended. In <br /> addition, discussions with Indian River County staff indicated that construction activities <br /> associated with the proposed roadway improvements such as underground utility installations, <br /> dewatering, etc. also need to be considered within the existing right-of-way areas where no <br /> right-of-way expansion is planned. <br /> PROJECT APPROACH <br /> The following scope of work describes the tasks necessary to preliminarily explore for the <br /> presence of contamination in soils and groundwater in the limited areas of the project study area, <br /> specifically at locations adjacent to the sites identified in the CSER as having"medium"and"high" <br /> potential for contamination. We note that the project limits have been reduced to the north and <br /> west; and therefore, additional exploration relative to the Keith's Oil Can, Brook's Residence and <br /> the Dodger Pines Country Club sites will not be included in this study. <br /> 408 d�'•v�'Concourse Plac:,Unit 1,Port St.Luce;Florida 34986 Phone(772,878-0072 =ax?72}878-0097 <br /> Florida:Bartow,Cocoa,Fort tlye t lanii,d':ando Port St.Lucie,Sarasota,Tallahassee.Taro Wcs"t Palm Beach <br /> Lcuis;ana:Alexandria,Batch Rouge,F,`onroe,New Greans,Shre•.eoort 32 <br />