The ornamental design for an above groundcontainmentwallcorner section, as shown and described.
FIG. 1 is a front view of an above ground containment wall corner section showing my new design;
FIG. 2 is a rear view of the above ground containment wall corner section;
FIG. 3 is an enlarged top view of the above ground containment wall corner section;
FIG. 4 is a left side view of the above ground containment wall corner section;
FIG. 5 is a bottom perspective view of the above ground containment wall corner section;
FIG. 6 is a top perspective view of the above ground containment wall corner section in a position of use. The broken lines depict environmental subject matter that forms no part of the claimed design; and,
FIG. 7 is a left direct edge on view of the above ground containment wall corner section.