Assertion: aquifer | /r/HasProperty | 40 cfr
Facets:
Source sentences:
text: An aquifer bounded above and below by impermeable beds or by beds of distinctly lower permeability than that of the aquifer itself; an aquifer containing confined groundwater (40 CFR 260.10).
text: A body of impermeable or distinctly less permeable material stratigraphically adjacent to one or more aquifers (40 CFR 146.3).