Minn. R. 4725.2950

Current through Register Vol. 48, No. 51, June 17, 2024

Part 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 60-2016 as determined by a person accredited by ANSI. A drilling additive is a substance added to the air or water used in the fluid system of drilling a well or boring.

Minn. R. 4725.2950

17 SR 2773; 33 SR 211; 45 SR 986

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