Layer Estimates:

Layer: Block_Groups_CH (ID:0)
Count: 2
Extent:

XMin: -8343620.7721
YMin: 4714007.8867
XMax: -8279945.9674
YMax: 4814670.2915
Spatial Reference: 102100 (3857)

Layer: GroupBySummary (ID:1)
Count: 231