Ethanol Plant Hydrogeologic Assessment: Camilla, Georgia
Leggette, Brashears & Graham, Inc. (LBG), completed a hydrogeologic assessment at the site of a proposed ethanol plant in Mitchell County, Georgia. The assessment consisted of the collection and evaluation of available hydrogeologic data including detailed information on the local geology, the character and quality of the aquifers beneath the property, the interaction between surface water with groundwater and the local use of the groundwater. The conclusion of the evaluation was that an aquifer was identified that could provide water in a sufficient volume and acceptable quality to meet the needs of the proposed plant.
GROUND-WATER FLOW MODELING
LBG performed ground-water flow modeling to stimulate the effects of the proposed groundwater withdrawal to evaluate the potential impact to other groundwater users in the area. The USGS model MODFLOW was utilized for the simulation which was created from the information collected during the hydrogeologic assessment. The completed groundwater flow model demonstrated that the drawdown associated with the withdrawal of water to supply the proposed plant did not pose an adverse impact to any other groundwater users in the area. A particle tracking model using WinFlow was also developed to assess potential impacts from a nearby landfill. Results of this effort indicated no expected impacts at the ethanol plant.
WATER WITHDRAWAL PERMIT
As required by the GADNR EPD, an application for a Water Withdrawal Permit was completed by LBG and submitted for the proposed ethanol plant near Camilla, Georgia. This involved contacting and working with EPD representatives to complete the application in accordance with the Georgia Administrative Rule (391-3-2-03). The objective of the application was to describe the intended use and quantity of water to be withdrawn and to demonstrate its beneficial use and that there would be no adverse impacts. A permit was approved by the state.
LBG assisted the ethanol plant developer in explaining the project at a public meeting held near the site. Technical information regarding the necessary wells and groundwater use was presented by LBG. Concerns regarding potential impacts to the resource and the users in the area were also addressed.