R 325.1603a Definitions; N, O.

Rule 103a. (1) "Neat cement" means a mixture of 1 bag of Portland or Portland Limestone cement, 94 pounds, and not more than 6 gallons of fresh water. Drilling fluid bentonite that is not more than 5% by weight of cement and additional water that is not more than 0.6 gallons for each 1% of bentonite may be added to neat cement. Other additives and admixtures must be approved by the department before use. (2) "Overburden" means unconsolidated geologic material, such as gravel, sand, silt, and clay, that overlies bedrock.