3701-28-12.2 Well development.

(A) For purposes of this rule:

(1) “Drawdown” means the extent to which the water level in and near a well is lowered when water is pumped or flows from the well.

(2) “Pump test” means to withdraw water from a well at a constant or stepped rate while measuring the drawdown in the well at specific time intervals for a specific period of time.

(3) “Stable yield” means the volume of water that can be consistently discharged from well over a period of time.

(B) Wells shall be properly developed upon completion until turbidity in the well is minimized.

(1) Mechanical development shall be performed so as not to cause damage to the components of the well.

(2) Chemical development procedures may be used in conjunction with mechanical procedures in accordance with the following requirements:

(a) Noncontinuous chemical treatment of a well, except chlorination, shall be performed by a registered contractor.

(b) Any chemicals used for well development or rehabilitation shall meet ANSI/NSF standard sixty-one and shall be used in a manner to prevent damage to the well or pump and prevent any hazard to humans or property. Any acid used shall be inhibited and neutralized upon removal from the well.

(c) Dispersing agents shall be used only when necessary to disaggregate clay particles to enhance removal. Chlorine shall be added to the mix water to prevent bacterial growth. Dispersing agents shall be immediately flushed from the well and aquifer to prevent bacterial growth in the aquifer.

(C) Upon completion of development of the well, the static water level shall be measured and recorded, and then the well shall be pump tested to determine the stable yield in gallons per minute, or gallons per hour, and the water level drawdown. The registered contractor may use the contractor’s pump or the well owner’s pump, a bailer, air blowing or air lifting to determine the accurate yield of the well. The pump test should be conducted for a period of time sufficient to determine the stable yield. For flowing wells, the flow rate may be measured using an orifice plate with manometer or equivalent. Water discharged from a pumping test shall not be discharged into household sewage disposal systems.

R.C. 119.032 review dates: 12/23/2004 and 11/15/2009

Promulgated Under: 119.03

Statutory Authority: 3701.344

Rule Amplifies: 3701.344

Prior Effective Dates: 1/1/2000