Several neighbors have been asking about the location of the abandoned dump. A report from 2005 shows an approximate location based on aerial photos from 1967. The photos can be viewed at https://www.historicaerials.com/viewer. (copy and paste these coordinates 42.524352, -83.853699) The red targets marked MW are monitoring wells. It is unknown if these wells still exist.
Here is the map overlaid on the current satellite image.