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Revised
Clean
Copy
of
Final
Temperature
Regulation
Proposed
Changes
to
the
Colorado
Temperature
Regulation
The
Water
Quality
Control
Division
(Division),
serving
as
staff
to
the
Water
Quality
Control
Commission
(Commission),
is
providing
a
revised
proposal
and
supporting
information
for
consideration
in
the
hearing
to
modify
certain
sections
of
the
Basic
Standards
and
Methodologies
for
Surface
Water,
Regulation
No.
31
(Basic
Standards)
and
corresponding
revisions
to
the
Classifications
and
Numeric
Standards
for
each
of
the
river
basins
in
Colorado
(Regulation
Nos.
32,
33,
34,
35,
36,
37
&
38).
WQCD
Proposal
and
Exhibits
Exhibit
1
Revisions
to
the
Proposal
and
Statement
of
Basis.
This
reflects
revisions
that
are
the
result
of
multiple
meetings
with
stakeholders
as
well
as
continued
work
to
augment
the
Colorado
Temperature
Database.
Exhibit
2
Electronic
copy
of
the
version
2
of
the
Colorado
Temperature
Database
and
queries.
A
CD
that
contains
the
database
has
been
submitted
to
the
Commission
office
and
copies
have
been
emailed
to
Parties
to
the
hearing.
Exhibit
3
Electronic
copies
of
the
version
2
MS
Excel
worksheets
used
to
calculate
table
values
presented
in
the
Prehearing
Statement.
A
CD
that
contains
the
spreadsheets
along
with
the
database
has
been
submitted
to
the
Commission
office
and
copies
have
been
emailed
to
Parties
to
the
hearing.
Exhibit
4
Water
Quality
Control
Commission
Policy
2006-1
Exhibit
5
Basis
for
Table
Value
Criteria
and
Explanation
of
2006
Temperature
Database.
This
includes
a
discussion
of
changes
between
the
Notice
version
and
the
Prehearing
statement
version.
Exhibit
6
Basis
for
Normal
Provisions
of
the
Temperature
Standard.
This
includes
the
evidence
in
support
of
the
Divisions
proposal
for
normal
pattern
of
seasonal
fluctuation,
summertime
diurnal
fluctuations,
spatial
diversity,
prohibition
of
abrupt
changes,
and
protection
of
critical
reproductive
season
Exhibit
7
Current
Draft
of
Implementation
Guidance
Exhibit
8
Current
Draft
of
Section
303(d)
Listing
Methodology
provisions
regarding
Temperature
Association
Temperature
Record
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