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Millions of gallons of potentially hazardous
chemicals and known carcinogens were injected into wells by leading
oil and gas service companies from 2005-2009, a report by three
House Democrats said Saturday.


      The report said 29 of the chemicals injected were
known-or-suspected human carcinogens. They either were regulated
under the Safe Drinking Water Act as risks to human health or
listed as hazardous air pollutants under the Clean Air Act.


      Methanol was the most widely used chemical. The substance is a
hazardous air pollutant and is on the candidate list for potential
regulation under the Safe Drinking Water Act.


      The report was issued by Reps. Henry Waxman of California,
Edward Markey of Massachusetts and Diana DeGette of Colorado.


      The chemicals are injected during hydraulic fracturing or "fracking," a
process used in combination with horizontal drilling to allow
access to natural gas reserves previously considered uneconomical.


      The growing use of hydraulic fracturing has allowed natural gas
production in the United States to reach levels not achieved since
the early 1970s.


      However, the process requires large quantities of water and
fluids, injected underground at high volumes and pressure. The
composition of these fluids ranges from a simple mixture of water
and sand to more complex mixtures with chemical additives.


      The report said that from 2005-2009, the following states had at
least 100,000 gallons of hydraulic fracturing fluids containing a
carcinogen: Texas, Colorado, Oklahoma, Louisiana, Wyoming, North
Dakota, New Mexico, Montana and Utah.


      States with 100,000 gallons or more of fluids containing a
regulated chemical under the Safe Drinking Water Act were: Texas,
New Mexico, Colorado, Oklahoma, Mississippi and North Dakota.


      The report said many chemical components were listed as
"proprietary" or "trade secret."


      "Hydraulic fracturing has opened access to vast domestic
reserves of natural gas that could provide an important stepping
stone to a clean energy future," the report said.


      "Yet, questions about the safety of hydraulic fracturing
persist, which are compounded by the secrecy surrounding the
chemicals used in hydraulic fracturing fluids. This analysis is the
most comprehensive national assessment to date of the types and
volumes of chemical used in the hydraulic fracturing process."


      The investigation of chemicals used in fracturing was started in
the last Congress by the House Energy and Commerce Committee, which
then was controlled by Democrats. The committee asked the 14
leading oil and gas service companies to disclose the types and
volumes of the hydraulic fracturing products they used between 2005
and 2009 and the chemical contents of those products.

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Millions of gallons of potentially hazardous
chemicals and known carcinogens were injected into wells by leading
oil and gas service companies from 2005-2009, a report by three
House Democrats said. The chemicals are injected during hydraulic fracturing, a
process used to allow
access to natural gas reserves previously considered uneconomical.

Dem. report: carcinogens injected into wells

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