Rulemaking for Portland Cement - Explorers and Exploratory Borings
Well Management Program

The Minnesota Department of Health (MDH) is revising Minnesota Rules, chapter 4727 (Explorers and Exploratory Borings) to reflect changes in the cement industry towards greener products.

Minnesota Rules, chapter 4727 define Type I Portland cement by its conformity with ASTM Standard C150. The cement industry is replacing Type I Portland cement with a “low carbon” Type IL Portland-limestone cement. This new Type IL Portland-limestone cement conforms to ASTM Standard C595, not authorized under current rules governing Explorers and Exploratory Borings. This revision redefines the Portland cement definition to include Type I and Type IL.

Revision Documents

Request for Comments as published on June 20, 2022, in the Minnesota State Register Volume 46, Number 51 (Page 1503)

Minnesota State Register, Volume 46, Number 51 (PDF)

In the Matter of the Proposed Amendment to Rules Governing Explorers and Exploratory Borings Minn. R. 4727, Revisor ID # R4755

Order on Request to Reduce Time for Soliciting Comments Under Minn. Stat. § 14.101, Subd. 4 (PDF)

How to comment

Interested persons or groups may submit comments or information on draft rule amendments.

Rulemaking Contacts

Questions regarding the rulemaking process or the revised rules may be directed to:

Well Management Section
Minnesota Department of Health
P.O. Box 64975
St. Paul, Minnesota 55164-0975

health.wells@state.mn.us
651-201-4600 or 800-393-9808