Please demand the full disclosure of the ALL chemicals used in gas fracking.  There is no way to ensure safety of water without a complete list of chemicals from which to use in laboratory testing.  Gas companies will do water testing prior to drilling in their "best practices" protocol.  If those water tests are the standard water quality test, chemically contaminated water could pass the test.  If the test isn't designed to detect the mulitple chemicals, they won't show up.  The gas companies can then claim that they haven't caused any contamination.  Unless the government demands to know what the chemicals are and is willing to also demand a comprehensive water test done PRIOR to drilling, then contamination by the gas companies can't be proven.  If the water  test is not designed to detect the chemicals, then they don't show up! It leaves all the responsiblility for testing on the landowners/lessors, and the tests are expensive and many landowners/lessors are not educated on how to protect themselves.