Oil mist or lubricated particles can also cause surface contamination.

The water was clean and clear with no surface contamination of any sort that could be seen.

Even our best calculations limit the extent of surface contamination to under a hundred years.

In addition, some surface contamination can occur by oxidation skin formation.

It can, however, be useful to have some surface contamination, such as the pump oil, to provide a calibration point.

For near surface contamination, standard construction equipment can be used.

These cut faster, with less burnishing and surface contamination from the bristles.

Monitoring personal, clothing, and surface contamination is also required.

Searing the outside a little just before eating it would help kill any surface contamination without using much power.

It pioneered new methods to try to eliminate the risk of surface contamination.