according to one of the articles the surveillance was sparked by unwanted jerrycans of leftover chems being dumped in a ditch in the same region. This is causing a big environment problem across many suburbs of NL, even the forestry workers are tweeting about it as well as the cops; as they need to get the fire brigade and special clean up teams in to deal with it.
NL politie also mention (as a separate incident) discovering an actual lab elsewhere in Noord Holland and some blokes from their 20s to 50s being arrested and some to appear before the judge.
Auch wenn du am Abgrund stehst, und gar nichts mehr verstehst,
wachen Engel über dich, halten dich im Licht und lassen dich nie fallen.