In this division—
diluted incidental coal seam gas means incidental coal seam gas that is subject to air contamination.
Note—
Diluted incidental coal seam gas will generally result from using underground in-seam and goaf drainage techniques for gas production.
undiluted incidental coal seam gas means incidental coal seam gas that is free of air contamination.
Note—
Undiluted incidental coal seam gas will generally result from using surface to in-seam techniques for gas production.