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converted to observation wells, and step-drawdown testing shall be performed to <br /> develop a relative comparison of the aquifer characteristics between sites. <br /> • Phase II Investigation (Basic Services) — One (1) or two (2) detailed aquifer <br /> tests shall be performed at the most favorable locations identified in Phase L Each <br /> test will include the installation of a test production well, four (4) additional <br /> observation wells, and a stilling well in the lake. A 10-day constant rate pumping <br /> test will be conducted at a pumping rate determined from the results of the step- <br /> drawdown testing performed in Phase I. <br /> • Groundwater Modeling (Optional) - If authorized by Owner, findings from <br /> Phase I and II investigations would be incorporated into a computerized, site <br /> specific groundwater model of the project area using MODFLOW software. This <br /> task would follow the Phase II Investigation. The model would be used to <br /> evaluate expected yield and drawdown under a variety of hydrologic and <br /> operating conditions. For example, various lake levels and drought conditions <br /> could be simulated to determine their effect on the resulting yield. Drawdown in <br /> the vicinity of the proposed wells could be evaluated for potential effects on <br /> existing wells. If two new wells are proposed, a model would be especially <br /> valuable to estimate potential reductions in yield due to interference of drawdown <br /> cones. <br /> Engineer proposes to have John Schilling, P.E. serve as the Project Manager and <br /> Kristopher Hahn, P.E. serve as Engineering Manager for the investigation described in <br /> this scope of services. However, if either of these individuals becomes unavailable for <br /> the investigation, Owner reserves the right to interview and select replacements from <br /> Engineer's staff. <br /> All documents and records in the possession of Engineer, sub-consultants, subcontractors <br /> and any other persons employed by Engineer, sub-consultants or subcontractors to <br /> perform a governmental function on the City of Decatur's behalf and directly related to <br /> the governmental function are subject to the Illinois Freedom of Information <br /> Act. Engineer shall agree to cooperate fully with the City to ensure the City's <br /> compliance with the Freedom of Information Act and agrees to hold the City harmless <br /> and indemnify it for any failure to so comply. <br /> 3 <br /> City of Decatur Task Order No. 16 <br /> Rev. 11-4-11 <br />