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Geosptec D <br />consultants <br />Janet B. Dunlap, P.E. <br />Indian River County Capital Projects <br />184025 1h Street <br />Vero Beach, Florida 32960 <br />Subject: Cattle Dip Site Interim Source Removal <br />9255 93rd Street on County Road 510 <br />Parcel #31392600000002000001.0 <br />Vero Beach, FL <br />Dear Ms. Dunlap: <br />6770 South Washington Avenue, Suite 3 <br />Titusville, Florida 32780 <br />PH321 2695880 <br />FAX 321_269.58 13 <br />www.gosynlec.com <br />2 January 2008 <br />Geosyntec Consultants (Geosyntec) is pleased to submit this fee proposal to Indian River County <br />(IRC) for professional services associated with additional soil assessment and the <br />implementation of Interim Source Removal (ISR) activities to address arsenic impacts at a <br />historic cattle dipping vat located at the referenced property. This fee proposal has been prepared <br />in accordance with the negotiated contract between Geosyntec and IRC Solid Waste Disposal <br />District. <br />PROJECT UNDERSTANDING <br />Geosyntec performed an initial assessment of the referenced property in January 2007 to assess if <br />former cattle dipping operations had an adverse impact on the soil and groundwater. The results <br />from the initial investigation demonstrated that arsenic is present in vadose zone soils at <br />concentrations exceeding the residential soil cleanup target level (SCTL) of 2.1 milligrams per <br />kilogram (mg/kg) and in the groundwater at concentrations exceeding the groundwater cleanup <br />target level (GCTL) of 10 micrograms per liter (µg/L) and the natural attenuation default criteria <br />(NADC) of 100 pg/L. <br />XR07084/CCR08003. DOC <br />en iueers scientists I int3uvaturs <br />