It is the second-smallest county by total area in Maryland. Notable waterways include the Choptank River and Tuckahoe Creek, as well as the man-made Williston Lake. Caroline County currently ranks seventh nationally in terms of land protected under the Ag Preservation Program.
Dry air contains roughly (by volume): All the above are relatively small, light, non-polar molecules, characteristics mimicking an ideal gas. At normal ambient conditions such as standard temperature and pressure, most real gases behave qualitatively like an ideal gas.
2.6.1 For long-term samples collect 10 L of air at 0.1 L/min (100-min samples). The recommended air volume is significantly lower than the breakthrough volume, but 10 L was chosen to provide a reasonable safety margin in the event other solvent vapors are present in the sampled air.