Ground rod in slab

[Jon mackay]

1960s construction.

The ground cable from the service panel enters the slab a couple inches away from a grounding rod. I can not verify that the cable is actually attached to the rod.
I entered the ground as not inspected but was curious what others might say in addition to this.
Would you recommend a new ground to ensure that there actually is a proper connection?

In the photo, the black cable is for other equipment.

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[Jerry Peck]

A couple of quick observations:
- that is a pipe clamp, not a rod clamp
- the ground rod is (presumable) 8 feet long and is quite obviously therefore not 8 feet in the ground
- that black ground conductor to "other equipment" is likely all wrong