I wonder how they knew to watch that place.
They have some large government accounts.
"We maintain the Philadelphia International Airport, Philadelphia Northeast Airport as well as the Phila Navy Yard, and many large and small residential, commercial and industrial complexes.
We maintain building interior plant scapes such as the Philadelphia Airport terminals and Mall."
https://www.manta.com/c/mmfbcd0/four-seasons-total-landscaping-inc