Chapter 18E.50 AQUIFER RECHARGE AND WELLHEAD PROTECTION AREAS This chapter is included in your selections. Sections: 18E.50.010 Purpose. 18E.50.020 Aquifer Recharge and Wellhead Protection Areas. 18E.50.030 Aquifer Recharge and Wellhead Protection Area Review Procedures. 18E.50.040 Aquifer Recharge and Wellhead Protection Area Standards.