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Gabriel,
Louisiana that is owned and operated by its subsidiary, Pioneer Americas LLC,
was spared any significant damage from the effects of Hurricane Katrina.

Certain statements in this news release are "forward -looking statements"
within the meaning of the Private Securities Litigation Reform Act.

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Pioneer Announces That Its Louisiana Chlor-Alkali Plant Will Resume Production

"
Pioneer, based in Houston, manufactures chlorine, caustic soda, bleach,
hydrochloric acid and related products used in a variety of applications,
including water treatment, plastics, pulp and paper, detergents, agricultural
chemicals , pharmaceuticals and medical disinfectants.

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Notes to Editors

IMERYS - Pigments for Paper

IMERYS Pigments for Paper business group is a world leading
producer of white pigments, manufacturing kaolin, ground calcium
carbonate (GCC) and precipitated calcium carbonate (PCC) at 44 plants
in 19 countries. Weinstein has announced that he
has resigned as the Chairman of the Board and as a director of Pioneer,
effective on December 31, 2005.

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Business Editors

ATLANTA----IMERYS introduces
CONTOUR(TM) Xtreme to the global paper industry. Pioneer owns and
operates four chlor -alkali plants as well as other downstream manufacturing
facilities in North America. HOUSTON, Pioneer Companies, Inc. Such
statements involve risks and uncertainties.

This category lists manufacturers of process chemicals and additives for the pulp and paper industry.

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Forward-
looking statements relate to matters that are not historical facts.

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Contour Xtreme, shape-engineered kaolin, is produced from Middle
Georgia crudes.
Contour Xtreme will be launched officially at the TAPPI Coating
Conference in Toronto in April. Such
statements involve risks and uncertainties. Actual outcomes may vary
materially from those indicated by the forward-looking statements.

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Achieve
superior glossing, coverage, brightness, strength and high print
quality in the coated graphic paper and packaging markets . Forward-
looking statements relate to matters that are not historical facts.

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This new "fine platy
pigment" is a unique new kaolin that provides synergy with carbonates,
combining the benefits of platy clays and fine glossing clays. Gabriel plant will be restarted as soon as Pioneer 's
customers are ready to resume their operations and transportation means are
available.

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The Pigments for Paper Group's portfolio of kaolin
and calcium carbonate products are key components in coating and
filling applications, increasing the value of paper and paperboard by
enhancing its appearance and printed quality. HOUSTON, Pioneer Companies, Inc. Mr. Weinstein's service as a director began
with the emergence of the Company from bankruptcy at the end of 2001.

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imerys grooves

Michael Y.
Michael Y."
Pioneer, based in Houston, manufactures chlorine, caustic soda, bleach,
hydrochloric acid and related products used in a variety of applications,
including water treatment, plastics, pulp and paper, detergents, agricultural
chemicals, pharmaceuticals and medical disinfectants.

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IMERYS Introduces Contour Xtreme Shape Engineered Kaolin for Paper Coating

Add an
extra dimension to structured coating design for better optical
synergy, gloss and printability-- replacing expensive pigments like
plastic pigment and TiO2.
Initial indications are that barge traffic on the river has resumed, and
some of the rail transportation necessary for the movement of product remains
uncertain .

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(Nasdaq: PONR) today reported that the chlor-alkali plant at St. McGovern, Pioneer's President and Chief Executive Officer,
stated, "The dedication and efforts of our St.
Certain statements in this news release are "forward-looking statements"
within the meaning of the Private Securities Litigation Reform Act.

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At this time, we anticipate that it will occur on or about
September 4. Gabriel team will enable us to
move quickly to restore the production of chlorine and caustic soda at the
plant.
Subsequently he was elected by the Board as the non-executive Chairman.

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Papermakers around the
world turn to Imerys for the performance characteristics that enable
them to improve their products and lower their overall production
costs.

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Those products will be essential in helping to rebuild the Gulf Coast
area. Pioneer owns and
operates four chlor-alkali plants as well as other downstream manufacturing
facilities in North America.

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Pioneer Announces the Resignation of David Weinstein as Chairman of the Board

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McGovern, Pioneer's President and Chief Executive Officer,
stated, "David has brought important leadership and expertise to Pioneer as a
director and as our Chairman . Actual outcomes may vary
materially from those indicated by the forward-looking statements.

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Breakthrough , patent-pending, technology has been made
possible through the development of radically new pigment
characterization methods and improved mining and processing
techniques.
(Nasdaq: PONR) today reported that David N.

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The St. During his tenure as a director and Chairman,
the Company and its balance sheet have been dramatically transformed, and we
appreciate the role David has played in that process.

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The
plant, which is on the Mississippi River a few miles south of Baton Rouge, was
shut down on August 28 in anticipation of the storm.