A water well contractor who uses hydrofracturing, as defined in We 101.20 to potentially increase the yield of a water well shall comply with the following requirements:

1. (a) Injection water used for hydrofracturing shall be drawn from a potable source if available;

2. (b) If a potable water source is not available, a water well contractor may use non-potable water if the water is:

   1. (1) Not drawn from stagnant water sources such as beaver ponds;
   2. (2) Free of visible sediment; and
   3. (3) Chlorinated to a minimum concentration of 50 parts per million and allowed to stand for a minimum of 1/2 hour contact-time prior to use;
3. (c) Packer settings shall be no less than 40 feet below the bottom of the casing and at least 60 feet below ground surface;
4. (d) For wells yielding 5 gallons per minute or less, yield measurement shall be for a minimum of 30 minutes after dewatering the hole and until the flow has stabilized;
5. (e) Dewatering the hole shall be accomplished by removing, either by pumping or by air lift method, no less than a quantity of water equal to the volume of water in the well;
6. (f) For the purposes of (e), above, dewatering a 6 inch diameter, 500 foot well, shall require removing a minimum of 1 1/2 gallons of water per linear foot of water column from the well, prior to taking the first yield measurement; and
7. (g) Dry ice and explosives shall not be used for hydrofracturing or well development in bedrock well construction.

Source. (See Revision Note at chapter heading for We 600) #12083 eff 3-1-17