The phrase "a seepage" is correct and usable in written English.
It can be used to refer to the act of liquid or gas leaking through a surface or the result of such leakage.
Example: "The heavy rain caused a seepage of water into the basement, leading to dampness and mold."
Alternatives: "a leak" or "an infiltration".
We now suffer from a seepage of historical memory.
Much of the writing in the new Grove is grim, showing a seepage of academic lingo.
A seepage had been found three miles from the well, he said, but the indications were that this had nothing to do with Macondo.
But opponents of the Lockheed offsets contend that they could well result in a transfer of American jobs to lower-wage Poland and a seepage of important technologies.
But Ms. Subra said a seepage into the soil or the aquifer would not evaporate and would collect in the groundwater.
There is a seepage of oil that gives the Somalis hope and a dressing for their camels' saddle sores, but little else.
The primary objective of the filter is to protect against soil erosion in applications where groundwater flow has the potential to cause a seepage-induced movement of particles while, at the same time, to provide for adequate discharge capacity and therefore unimpeded drainage of the soil.
"Originally, when information 'leaked,' " he was quoted as saying by William Safire in a 1982 On Language column, "it was thought of as an accidental seepage — a lost document, a chauffeur's unwary anecdote, loose lips in the Pentagon.
Groundwater inflow to a subtropical seepage lake was estimated using a transient isotope-balance approach for a decade (2001 2011) with wet and dry climatic extremes.
It deserves a fair hearing from a government that cannot offer anything more than a slow seepage of overpriced developers' housing.
Massey officials denied culpability, claiming that a sudden seepage of natural gas "overwhelmed" an adequately maintained ventilation system.
