They left glowing material all the way to the barn.

My grandmother lived out in the country in Elk Grove, California, on a farm of one hundred acres.
In 1970, she called me, reporting there were three little green men outside and that a saucer had landed in the front yard.  This call had come at 3:30 AM and I went right over.. When I arrived, Grandma was very scared and the craft was gone, but had left a burned spot on the lawn area, round in shape.  There was also a trail of green glowing spattered slime trails all the way to her barn.  I followed the glowing stuff to the barn and  put a sample of the material in a jar.  I took the material to the Air Force for examination and never heard anything of the results.
I wanted to share this with you in the hopes you may have any reports of sightings in the area during that time.