It all began this February when Anne Jackson Hefti and friend Amy Ryan were walking their dogs in Sunset Cliffs Natural Park, and claim they were exposed to wind-drift toxic herbicide sprayed by workers there. “They were spraying in front of us and behind us and there were ‘No’ signs posted, and the area was not taped off to keep us off the trail,” said Jackson Hefti, adding Ryan “asked the contractors to stop spraying until we left the area.”