We also reported a couple of active gas stations that were not registered with the UST Division. As we discussed at the meeting, further research was conducted since the original Wellhead Protection Program was drafted. It was determined that the 2- mile radius was unnecessarily large and took too much time to inventory. Studies of ground water velocities in aquifers statewide support the use of the protection areas proposed for the Source Water Assessment Program. Even the 1- mile radius affords at least a 5 year time of travel from the edge of the protection area to the well.
Studies also indicate that contaminants tend to break down over time and distance.
The most critical area is 1000 feet or less from the well. In all cases of public water supply well contamination in the state, the source was within 1000 feet of the well. The revised radius sizes can also be inventoried in the very short time frame under which the program must be completed. Well Inventory for the State of Louisiana. This database is maintained by the Department of Natural Resources, as they regulate such wells.