312 IAC 13-5-1 Materials and installation

Sec. 1. (a) This section governs grouting materials and the installation of grouting materials for new wells. (b) Grouting materials shall consist of: (1) neat cement with no more than five percent (5%) by weight of bentonite additive; (2) bentonite slurry (which can include polymers designed to retard swelling); (3) pelletized, granular, medium grade, or coarse grade crushed bentonite; or (4) other materials approved by the commission. (c) This section applies if neat cement or a bentonite slurry is used for grouting. The cement or slurry shall be pumped into place from the bottom of the annular space upward in a continuous operation with a grout pipe or the well casing using the positive displacement method. (d) Grouting material, other than neat cement or bentonite slurry, shall be introduced in a manner to prevent bridging of the annulus between the outside of the well casing and the borehole. (e) A borehole annulus shall be grouted upon the earlier of the following: (1) Within twenty-four (24) hours after the installation of the well casing. (2) Before drilling equipment is removed from the site. (f) This section does not apply to a public water supply well. The installation of a public water supply well is governed by 327 IAC 8-3.4.