APPLE VALLEY (CBSLA) — Imagine going outside to water the lawn and disappearing into the ground.

That’s what Dennis Love experienced Monday, after falling into a sinkhole and into 15 feet of water in what turned out to be a collapsed septic tank.

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“Next thing I know, I’m under water,” Love said. “Managed to float to the top, couldn’t reach to the top.”

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He tried to pull himself up using roots, but was unable to get out of the tank. Neighbors eventually found him and tried to get him out.

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After stabilizing the surface, firefighters were finally able to rescue him using a harness.