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GLIN==> Tributyltin

[Federal Register: January 5, 2004 (Volume 69, Number 2)]
[Page 342-343]
>From the Federal Register Online via GPO Access [wais.access.gpo.gov]


Notice of Availability of Final Aquatic Life Criteria Document
for Tributyltin (TBT)

AGENCY: Environmental Protection Agency (EPA).
ACTION: Notice of availability.


SUMMARY: This notice informs the public of the availability of a final
aquatic life criteria document for tributyltin (TBT). The Clean Water
Act (CWA) requires the Environmental Protection Agency (EPA) to develop
and publish, and from time to time revise, criteria for water
accurately reflecting the latest scientific knowledge. When final,
these criteria provide EPA's recommendations to States and authorized
Tribes as they establish their water quality standards as State or
Tribal law or regulation. Once established, an EPA water quality
criterion does not substitute for the CWA or EPA regulations, nor is it
a regulation. It cannot impose legally binding requirements on the EPA,
States, authorized Tribes or the regulated community. State and tribal
decision makers have discretion to adopt approaches that differ from
EPA's guidance on a case-by-case basis. At this time the Agency is
making a final recomendation for TBT.

ADDRESSES: Copies of the criteria document entitled, Ambient Aquatic
Life Water Quality Criteria for Tributyltin (TBT)--Final (EPA-822-R-03-
031) may be obtained from EPA's Water Resource Center by phone at (202)
566-1729, or by e-mail to <A HREF="" href="" eudora="autourl">mailto:center.water.resource@epa.gov">center.water.resource@epa.gov</A> or by
conventional mail to: EPA Water Resource Center, 4101T, 1200
Pennsylvania Avenue, NW., Washington, DC 20460. You can also download
the document from EPA's Web site at <A HREF="" href="" eudora="autourl">http://www.epa.gov/waterscience/criteria/tributyltin/">

FOR FURTHER INFORMATION CONTACT: Frank Gostomski, Health and Ecological
Criteria Division (4304T), U.S. EPA, 1200 Pennsylvania Avenue, NW.,
Washington, DC 20460; (202) 566-1105; <A HREF="" href="" eudora="autourl">mailto:gostomski.frank@epa.gov">gostomski.frank@epa.gov</A>


I. General Information

A. Interested Entities

    Entities potentially interested in today's notice are those that
produce, use, or regulate TBT. Categories and entities interested in
today's notice include:

                                               Examples of interested
                 Category                             entities
State/Local/Tribal Government.............  States and Tribes
TBT Dischargers...........................  Shipyard repair facilities
TBT Users.................................  Producers of anti-fouling

    This table is not intended to be exhaustive, but rather provides a
guide for readers regarding entities likely to be interested in this
notice. This table lists the types of entities that EPA is now aware
could potentially be interested in this notice. Other types of entities
not listed in the table could also be interested.

B. How Can I Get Copies of This Document and Other Related Information?

    1. Docket. EPA has established an official public docket for this
notice under Docket ID No. OW-2002-0003. The official public docket
consists of the documents specifically referenced in this notice, any
scientific views received, and other information related

[[Page 343]]

to this notice. Although a part of the official docket, the public
docket does not include Confidential Business Information (CBI) or
other information whose disclosure is restricted by statute. The
official public docket is the collection of materials that is available
for public viewing at Water Docket in the EPA Docket Center, (EPA/DC)
EPA West, Room B102, 1301 Constitution Ave., NW., Washington, DC. The
EPA Docket Center Public Reading Room is open from 8:30 a.m. to 4:30
p.m., Monday through Friday, excluding legal holidays. The telephone
number for the Public Reading Room is (202) 566-1744, and the telephone
number for the Water Docket is (202) 566-2426. To view these documents
materials, please call ahead to schedule an appointment. Every user is
entitled to copy 266 pages per day before incurring a charge. The
Docket may charge 15 cents a page for each page over the 266-page limit
plus an administrative fee of $25.00.
    2. Electronic Access. You may access this Federal Register document
electronically through the EPA Internet under the ``Federal Register''
listings at <A HREF="" href="" eudora="autourl">http://www.epa.gov/fedrgstr/">http://www.epa.gov/fedrgstr/</A>.
    An electronic version of the public docket is available through
EPA's electronic public docket and comment system, EPA Dockets. You may
use EPA Dockets at <A HREF="" href="" eudora="autourl">http://www.epa.gov/edocket/">http://www.epa.gov/edocket/</A> to view scientific
views, access the index listing of the contents of the official public
docket, and to access those documents in the public docket that are
available electronically. Once in the system, select ``search,'' then
key in the appropriate docket identification number.

II. Background and Today's Notice

A. What Are Recommended Water Quality Criteria?

    Recommended water quality criteria are the concentrations of a
chemical in water at or below which aquatic life are protected from
acute and chronic adverse effects of the chemical. Section 304(a)(1) of
the Clean Water Act (CWA) requires EPA to develop and publish, and from
time to time revise, criteria for water accurately reflecting the
latest scientific knowledge. Water quality criteria developed under
section 304(a) are based solely on data and scientific judgments. They
do not consider economic impacts or the technological feasibility of
meeting the criteria in ambient water. Section 304(a) criteria provide
guidance to States and Tribes in adopting water quality standards. The
criteria also provide a scientific basis for EPA to develop Federally
promulgated water quality standards under section 303(c) of the CWA.

B. What Is Tributyltin (TBT) and Why Are We Concerned About It?

    TBT is an organotin compound used primarily as a biocide in
antifouling paints. It is extremely toxic to aquatic organisms.
Environmental exposure occurs mainly from its application as a biocide
in antifouling paints applied to ship hulls to keep barnacles and other
fouling organisms from attaching to the hull. TBT remains effective
over long periods because it is released from the hull into the water
column over time. TBT is extremely stable and resistant to natural
degradation in water. Because of TBT's high toxicity and the potential
exposure of aquatic organisms to it, EPA has developed ambient water
quality criteria for it.

C. What Are the National Recommended Water Quality Criteria for TBT?

    Aquatic life should not be affected unacceptably if the: One-hour
average concentration of TBT does not exceed 0.46 ug/l more than once
every three years on the average (Acute Criterion); and Four-day
average concentration of TBT does not exceed 0.072 ug/l more than once
every three years on the average (Chronic Criterion).
    Aquatic life should not be affected unacceptably if the: One-hour
average concentration of TBT does not exceed 0.42 ug/l more than once
every three years on the average (Acute Criterion); and Four-day
average concentration of TBT does not exceed 0.0074 ug/l more than once
every three years on the average (Chronic Criterion).

D. Why Is EPA Notifying the Public About the Final TBT Criteria

    Today, EPA is notifying the public that this final aquatic life
criteria document for TBT is available. In the Federal Register on
August 7, 1997 (62 FR 42554), EPA notified the public that a draft
aquatic life criteria document for TBT was available and solicited
scientific input. Based on the information and data submitted, EPA
updated the draft document and made revised criteria available to the
public for scientific input in a Federal Register notice on December
27, 2002 (67 FR 79090). EPA is now making the final aquatic life
criteria document for TBT available to the public.

E. Where Can I Find More Information on EPA's Revised Process for
Developing New or Revised Criteria?

    The Agency published detailed information about its revised process
for developing and revising criteria in the Federal Register on
December 10, 1998 (63 FR 68354), and in the EPA document entitled,
National Recommended Water Quality--Correction (EPA 822-Z-99-001, April
1999). The purpose of the revised process is to provide expanded
opportunities for public input, and to make the criteria development
process more efficient.

    Dated: December 23, 2003.
Geoffrey H. Grubbs,
Director, Office of Science and Technology.
[FR Doc. 04-82 Filed 1-2-04; 8:45 am]

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