Minnesota Administrative Rules

4725.2950 DRILLING FLUIDS.

Subpart 1.

Water.

Water used for drilling, development, hydrofracturing, sealing, repair, or rehabilitation, other than water from the well or boring itself, must:

A.

come from a potable water system or from a well or boring of similar use and construction;

B.

contain a free chlorine residual at all times, except for monitoring wells and remedial wells where chlorine will interfere with water quality analysis or remediation; and

C.

be conveyed and stored in clean, sanitary tanks and water lines.

Subp. 2.

Drilling additives.

Drilling additives, including bentonite, must meet the requirements of ANSI/NSF Standard 60-2003e as determined by a person accredited by the ANSI under ANSI Standard Z34.1-1993. A drilling additive is a substance added to the air or water used in the fluid system of drilling a well or boring.

Statutory Authority:

MS s 103I.101; 103I.111; 103I.205; 103I.221; 103I.301; 103I.401; 103I.451; 103I.501; 103I.525; 103I.531; 103I.535; 103I.541; 103I.621; 144.05; 144.12; 144.383; 157.04; 157.08; 157.09; 157.13

History:

17 SR 2773; 33 SR 211

Published Electronically:

September 2, 2008