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Geo syn to e � 6770 South Washington Avenue, Suite 3 <br />Titusville, Florida 32780 <br />PH 321.269.5880 <br />C011SUlta n (S FAX 321.2695813 <br />,mw.geosy nleacoin <br />ATTACHMENT A <br />24 March 2010 <br />Mr. Terry Southard <br />Operations Manager <br />Indian River County Utilities <br />4350 4151 Street <br />-Vero Beach, FL 32967 <br />Subject: Natural Attenuation Monitoring Reporting Proposal <br />North County R.O. Plant, Facility #9600729 <br />Vero Beach, FL 32962 <br />Dear Mr. Southard, <br />Geosyntec Consultants (Geosyntec) is pleased to submit this fee proposal to Indian River County <br />(IRC) for professional services required to provide reporting documentation to respond to <br />Florida Department of Environmental Protection's (FDEP's) correspondence dated 21 December <br />2009. The FDEP correspondence was generated based upon a review of Geosyntec's 21 <br />September 2009 report, Site Assessment Report, North RO Plant, Facility #9600729. Based <br />upon a review of the Site Assessment Report (SAR), FDEP approved the Natural Attenuation <br />(NAM) Plan proposed in the September 2009 SAR for the above reference Site with the <br />following specific conditions: <br />• The NAM Plan shall include wells MW01, MW02, MW03, MW05, MW06, PZ10, PZ19, <br />PZ20, and PZ22. <br />• Groundwater monitoring shall be completed on a quarterly basis with quarters being <br />January through March, April through June, July through September and October <br />through December. <br />• If sodium concentrations increase above the current concentration of 213 milligrams per <br />liter reported in the groundwater samples from well MW06 then the Department shall <br />require additional assessment activities near well MW06 as needed to define the extent of <br />horizontal contamination. <br />XR10051/XR10051 IRC North RO NAM Reporting Proposal.Doc <br />engineers I scientists I innovators <br />