The ornamental design for a shelf for a water sampling and monitoring station, as shown and described.
FIG. 1 is a perspective view of a shelf for a water sampling and monitoring station showing the new design.
FIG. 2 is a side elevational view thereof, the opposite side being a mirror image thereof.
FIG. 3 is a front elevational view thereof.
FIG. 4 is rear elevational view thereof.
FIG. 5 is top plan view thereof.
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a perspective view thereof, where the broken line showing is for the purpose of illustrating the environmental structure of the article and forms no part of the claimed design.