Waste Management and InEnTec create joint venture to develop and operate plasma gasification facilities

    S4 Energy Solutions to generate renewable energy and environmentally
    beneficial byproducts from waste

    HOUSTON, TX and BEND, OR, May 21 /CNW/ - Waste Management, Inc. (NYSE:  
WMI) and InEnTec LLC today announced the formation of S4 Energy Solutions LLC,
a joint venture to develop, operate and market plasma gasification facilities
using InEnTec's Plasma Enhanced Melter (PEM(TM)) technology. The joint venture
is expected to process waste from the country's increasingly segmented
commercial and industrial waste streams to produce a range of renewable energy
and environmentally beneficial fuels and industrial products as well as to
generate electricity.
    S4 Energy Solutions' initial focus will be to process medical and other
segregated commercial and industrial waste streams. The company's future
commercialization plans may also include the processing of municipal solid
waste once the technology has been demonstrated to be economical and scalable
for such use.
    "We see waste as a resource to be recovered, and this joint venture with
the PEM(TM) system will help Waste Management's commercial and industrial
customers maximize high energy value waste streams to generate valuable
renewable energy products based on their unique environmental and logistical
considerations," said Joe Vaillancourt, managing director at Waste Management.
"With InEnTec, Waste Management has found a partner with a promising
technology as well as strong management, research and development capabilities
to address the hurdles to implementing a new technology."
    With the PEM(TM) process, waste materials are fed into a closed chamber
where they are superheated to temperatures of between 10,000 and 20,000
degrees Fahrenheit using an electricity-conducting gas called plasma. The
intense heat of the PEM(TM) rearranges the molecular structure of the waste,
transforming organic (carbon-based) materials into an ultra-clean, synthesis
gas (syngas). The clean syngas could be converted to transportation fuels such
as ethanol and diesel, industrial products like hydrogen and methanol or used
as a substitute for natural gas for heating or electricity generation. In a
secondary stage of the PEM(TM) process, inorganic (non-carbon-based) materials
are transformed into environmentally beneficial products.
    "Our PEM(TM) systems are the leading technology for commercial plasma
gasification, and Waste Management will provide much of the process knowledge
that will help make our joint venture successful," said Jeff Surma, president
and chief executive officer of S4 Energy Solutions. "The PEM(TM) technology
has demonstrated its ability to process a number of waste streams, and we are
looking forward to developing more projects that sustainably manage waste
while recovering valuable energy and resources."
    The joint venture, combining Waste Management's industry leadership and
expertise in the collection and management of a wide range of segmented
commercial and industrial waste streams with InEnTec's PEM(TM) technology
could produce a variety of environmentally beneficial end products, which will
be key to the advancement, commercial development, and scalability of the
PEM(TM) technology. It is also complementary to Waste Management's
comprehensive waste services in the areas of recycling, landfill, and
waste-to-energy and consulting services capabilities.
    Together with Waste Management's other renewable energy initiatives, this
joint venture will move Waste Management toward meeting two of its
sustainability goals, doubling its renewable energy production to provide
enough power for the equivalent of two million homes by 2020, and investing in
emerging technologies for managing waste.
    For more information about S4 Energy Solutions and the PEM(TM) process,
please visit www.S4EnergySolutions.com.

    About Waste Management

    Waste Management, based in Houston, Texas, is the leading provider of
comprehensive waste management services in North America. Our subsidiaries
provide collection, transfer, recycling and resource recovery, and disposal
services. We are also a leading developer, operator and owner of
waste-to-energy and landfill gas-to-energy facilities in the United States.
Our customers include residential, commercial, industrial, and municipal
customers throughout North America. To learn more visit www.wm.com or

    About InEnTec LLC

    Based in Bend, Oregon, InEnTec LLC (formerly Integrated Environmental
Technologies LLC) was formed by engineers from MIT, Battelle, and GE. Through
its proprietary gasification system, the Plasma Enhanced Melter(TM), InEnTec
can transform medical, commercial and industrial and hazardous wastes into
clean renewable products such as ethanol, methanol, diesel and hydrogen as
well as generate electricity. For more information and to see a brief video on
InEnTec's process, please visit http://www.inentec.com/pemprocess.html.

    Waste Management, from time to time, provides estimates of financial and
other data, comments on expectations relating to future periods and makes
statements of opinion, view or belief about current and future events.
Statements relating to future events and performance are "forward-looking
statements." The forward-looking statements that Waste Management makes are
its expectations, opinion, view or belief at the point in time of issuance but
may change at some future point in time. By issuing estimates or making
statements based on current expectations, opinions, views or beliefs, Waste
Management has no obligation, and is not undertaking any obligation, to update
such estimates or statements or to provide any other information relating to
such estimates or statements. We caution you not to place undue reliance on
any forward-looking statements, which speak only as of their dates.

For further information:

For further information: Waste Management, Media: Wes Muir, (905)
483-3099, wmuir@wm.com; InEnTec LLC, Media: Larry Carpman, (617) 338-6601,

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