What can I use as ground, I am working on a paved parking lot?

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You can use a ground extension wire to help you reach a good ground. Otherwise look for signs with metallic posts, fences, guard rails, a manhole’s rim, or other metallic structures that may be contacting the ground underneath the pavement. You can also try to wet the pavement with water and place a metal plate over it, then use this metal plate as your ground. The latter may require you to use a higher frequency on your locator (33 kHz or higher).

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