Minnesota Administrative Rules
Agency 144 - Health Department
Chapter 4725 - WELLS AND BORINGS
WELL AND BORING GENERAL CONSTRUCTION AND USE REQUIREMENTS
Part 4725.2950 - DRILLING FLUIDS

Universal Citation: MN Rules 4725.2950

Current through Register Vol. 49, No. 13, September 23, 2024

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.

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

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