a. The following minimum distances from potential sources of contamination and pollution apply to all wells except Monitoring and Cathodic protection wells:

b. Monitoring and Cathodic protection wells shall maintain setbacks from potential sources of contamination as approved by the Health Officer. Such setbacks shall be dependent on the source of contamination, the depth of the Monitoring or Cathodic protection well, the depth and type of the annular seal, the formations which are penetrated, and the proposed usage.

c. The well casing for any Public Water System Well, Individual Domestic Well, Industrial Well or Agricultural Well constructed after adoption of this section shall extend at least one (1') foot above the elevation of the one hundred (100) year floodplain elevation, or above any known condition of flooding by drainage or runoff from the surrounding land. An exemption from this requirement may be given in cases where an approved pitless adapter is used and the venting of the well is above the elevation required for the well casing.

d. Construction standards as defined by this section shall apply to test wells and exploration test holes after the effective date of this section unless such test wells or exploration test holes are destroyed within thirty (30) days of completion.

e. All wells except monitoring wells and cathodic protection wells constructed after adoption of this section shall be at least ten (10') feet from any structure not designed to house or protect the well.

f. A log of the types and depths of formations penetrated by well is to be maintained on the job site whenever work is being done as part of the construction process.

g. If a temporary conductor casing is used, it shall be removed when possible as part of the sealing process. If the conductor casing cannot be removed and does not have an annular space of at least two (2") inches all the way around the conductor casing between the conductor casing the drilled hole, the conductor is to be perforated with a minimum open space of one-half opening per two inches (1/2" × 2") of diameter equally spaced every three (3') feet of casing. The sealing material shall be placed under pressure, shall be approved by the Health Officer and shall not be capable of bridging the open space in the conductor casing.

h. All drilling equipment shall be sanitized with a 100ppm chlorine solution or equivalent prior to the construction of each well.

i. The minimum size of any well which is to be used for water production for domestic or commercial usage is to be five (5") inches diameter.

j. Any time a well is constructed or opened for repair, maintenance, testing, or for any other reason the well is to be adequately protected and disinfected to remove possible contaminates which may enter the well.

k. Where neat cement, sand cement grout, or concrete is used as an annular seal, it shall be placed in such a manner that the concrete does not begin to harden or separate until the complete seal has been placed.

l. Monitoring wells and cathodic protection wells shall have an annular seal to prevent surface contamination to a depth approved by the Health Officer.

m. Monitoring wells shall be sealed off from all strata which is not to be monitored in a method approved by the Health Officer.

n. No well shall be left unattended unless such well has a protective seal.

o. Whenever a new well is drilled to replace an existing well because of structural problems, the existing well is to be destroyed under permit as required by Section 9-61.

p. Water used for sealing or drilling mixtures shall be clean and of a potable quality.

q. Existing wells, which are at least ten (10") inches or more in diameter and used primarily for agricultural purposes, may be deepened utilizing the existing casing if the following conditions are met:

Deepening of such a well shall require a permit pursuant to subsection 11-5.1. Such wells shall be destroyed when abandoned for agricultural purposes. (Ord. #23-90, S1)