Indiana Administrative Code
Title 312 - NATURAL RESOURCES COMMISSION
Article 13 - WATER WELL DRILLERS AND WATER WELL PUMP INSTALLERS
Rule 9 - Well Disinfection
Section 9-1 - Disinfection procedures for drilled wells
Universal Citation: 312 IN Admin Code 9-1
Current through March 20, 2024
Authority: IC 25-39-4-2; IC 25-39-4-9
Affected: IC 25-39
Sec. 1.
(a) Except as provided in subsection (d), the following procedures shall be used for the disinfection of drilled wells:
(1) The amount
of water in the well shall be determined by multiplying the gallons per foot by
the number of feet of water in the well according to the following table:
Diameter of Well in Inches | Gallons Per Foot |
2 | .16 |
3 | .37 |
4 | .65 |
5 | 1.00 |
6 | 1.50 |
8 | 2.60 |
10 | 4.10 |
12 | 6.00 |
(2)
At least one hundred (100) parts per million of chlorine concentration in water
are required for disinfection. For each one hundred (100) gallons of water in
the well, the amount of chlorine liquid or compound shown in the following
table shall be used:
Laundry Bleach (5.25% chlorine) | Hypochlorite Granules (70% chlorine) |
3 cups | 2 ounces |
(3)
The solution prepared under subdivision (2) shall be poured into the well to
ensure the casing walls are wetted before the cover, cap, or seal is
installed.
(4) Instead of the
applications described in subdivisions (1) through (2), another application of
chlorine may be substituted by a water well driller which results in a chlorine
concentration of at least one hundred (100) parts per
million.
(b) As used in this section, one (1) cup is equivalent to an eight (8) ounce measuring cup.
(c) As used in this section, one (1) ounce is equivalent to one (1) heaping tablespoon of granules.
(d) This section does not apply to a monitoring well or a dewatering well.
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