Imagine a Sphere 100' in Diameter made of Water and Toxic Chemicals

Something truly frightens me about this video.
So close to a dairy farm. Shot by Vera in Susquehanna County PA on Saturday:

https://www.youtube.com/watch?v=y7KNI0TNX0k


Which started me thinking...

According to Skytruth, is the average for a frac-job in PA, is 4.3 million gallons of water.
http://blog.skytruth.org/2012/09/water-water-everywhere-20-months-of.html

I once calculated that this volume of water would be a sphere ~103 ft in diameter.

Let's let Wolfram Alpha check out my math:
http://www.wolframalpha.com/input/?i=volume+of+a+sphere+103%27+in+diameter+in+gallons

Here is a disk 100' in diameter:

Pleasure Pier Ferris Wheel, Galvaston TX. 100' in Diameter.

Imagine this 100ft disc to be a sphere (like a globe). That would hold about 4 million gallons. 
Now imagine this volume of water pumped 1 mile underground. 

The Gas Industry says there is no risk of Earthquakes from Fracking.

Have a nice day!