Hydraulic Fracturing - Induced Fractures and the Freshwater Aquifer

I came across these Industry Articles and a resource guide from the League of Women Voters- they do not appear to be peer reviewed, but I think it is good starting point in the discussion. 

http://www.pinntech.com/pubs/NL/Frac_Attack_Eprint.pdf
or
http://www.bfenvironmental.com/pdfs/inducedfracturingoilreporter.pdf

http://www.bfenvironmental.com/pdfs/Hydraulic_Fracturing_Paper_-_World_Watch.pdf

http://www.bfenvironmental.com/pdfs/HydraulicFracturingReport1.2008.pdf
http://www.bfenvironmental.com/pdfs/Sample20Fluid20Composition-BJ20Services.pdf

http://www.bfenvironmental.com/pdfs/Sample20Fluid20Composition-Halliburton.pdf


http://www.bfenvironmental.com/pdfs/Marcellus_Shale_Study_Guide_Parts_1-5.pdf

It is my understanding from a different report that fracing process may initially create fractures that radiate about 1000 to 1500 feet from a well, but the production zone is limited to a distance of about 300 to 500 feet because the fractures beyond this distance do not stay open. (Source World Watch Report)

Instructions for the tipline can be found at: http://www.epa.gov/region03/marcellus_shale/tipline.html