What a nightmare scenario.
This would be the worst job ever for me. Having to clean out a Wastewater treatment plant in Baltimore, USA that has been over run with spiders. About 107 million of them, spread out over 4 acres. There is no amount of money available that would entice me to seek employment there. Grubby evil eight legged multi eyed bastards - l hate them.
The details and research paper about them can be found here.