Dive Summary:

• A helicopter made an emergency landing at Fenimore landfill in Roxbury, N.J.
• The pilot departed within half an hour of his arrival—after the rain had cleared, the helicopter took off without incident.
• Dangerously high hydrogen sulfide gas spikes were detected at the landfill site, causing residents to evacuate the vicinity, just one day before the pilot's landing.

From the article:

... Police reported no injuries and no mechanical problems with the helicopter.

The pilot simply made the responsible decision to touch down until the rain let up, according to police, who said firefigthers and police responded as a precuation. ...