Agenda - 09-15-2009 - 6a - Laserfiche WebLink

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Observation Well Network Timeline 5 6 August 2009 • The Millhouse Road property (epiclastics); and • The existing well on Rocky Ridge Road (felsic lavas and tuffs). C. Next Steps 1. Additional existing bedrock wells on the following non-County owned properties have been identified as potential candidates for inclusion in Orange Well Net (with bedrock geology listed): • UNC-CH's former McCauley Geophysical Laboratory off Ray Road, Carrboro (felsic plutonics-East Farrington granite); • Duke Forest Blackwood Division on Eubanks Road (mafic plutonics); • Eno River Associations Eno confluence property on Highland Farm Road (felsic tuff); and • The NCDENR Division of Water Quality's Duke Forest Hydrogeological Station off Mount Sinai Road [felsic plutonics (well 4D) and intermediate plutonics(well 1 D)]; 2. The use of non-County owned wells requires the approval of a Memorandum of Agreement (MOA) between the County and the owner of the property on which the well is located. MOA's must be completed for the following wells: • The UNC CH well off Ray Road, • The Duke Forest Well on Eubanks Road, and • The Eno River Association well on the Eno confluence property on Highland Farm Road. Draft MOAs have been submitted to each of these organizations and each draft MOA has been reviewed by the County attorney prior to submittal to the BOCC. Proposed Completion Date: September 30, 2009 3. Through a combination of existing wells on County-owned and some non- County-owned properties, nine potentially suitable bedrock wells in the county have been identified and are being considered for inclusion in the observation well network. 4. Certain steps must be completed prior to using existing bedrock wells as observation wells, including: • Completion of a MOA, if needed, • Removal of the pump, if one is present in the well, • Well construction details should be obtained or determined, and • Resolution of whether or not the surface casing present on the well is leaking.