Drinking Water; National Primary Drinking Water Regulations Synthetic Organic Chemicals and Inorganic Chemicals; National Primary Drinking Water Regulations Implementation; Monitoring for Unregulated Contaminants

SUMMARY: In this document, EPA is amending the National Primary

Drinking Water Regulations to correct typographical errors, clarify

language which was unclear, and correct mistakes where the preamble

correctly indicated the Agency's intent but the language of the

regulation was in error. These changes are intended to simplify

implementation of the regulations by reducing confusion about Agency

requirements.

EFFECTIVE DATE: These amendments are effective July 1, 1994.

FOR FURTHER INFORMATION CONTACT: Richard Reding, Technical Support

Division, Office of Ground Water and Drinking Water, Environmental

Protection Agency, Cincinnati, Ohio 45268, (513) 569-7946.

SUPPLEMENTARY INFORMATION: In 1987, EPA promulgated National Primary

Drinking Water Regulations for eight contaminants (Phase I). In 1991,

EPA promulgated National Primary Drinking Water Regulations for 38

contaminants (Phase II). In 1992, EPA promulgated National Primary

Drinking Water Regulations for 23 contaminants (Phase V). The

regulations contained errors which are corrected by this document. This

document also clarifies the intent of the regulatory requirements in

cases where the language was confusing or contradictory with the

preamble.

The Administrative Procedure Act, 5 U.S.C. 553, provides that when

an Agency finds good cause, it may issue a rule without first providing

notice and comment and make the rule immediately effective. This

document corrects errors and omissions in 40 CFR 141 and 142. These

revisions are so minor that the Agency finds that neither comment nor a

delayed effective date is necessary or in the public interest.

Accordingly, EPA finds that there is good cause not to solicit comment

on this document and to have the revisions immediately effective.

Corrections to the Regulation

This document corrects errors in the regulatory language. These

corrections are described below.

This document corrects the definition of ``Initial compliance

period'' in Sec. 141.2 by inserting the ``Sec. '' before 141.61 and

141.62 which was mistakenly omitted. This document also corrects

141.62(b) (11)-(16) to (11)-(15), as the table only lists 15

contaminants.

Secs. 141.23(d), (d)(4), (e), and (e)(3) and Sec. 141.62(b)

establish monitoring frequencies for transient non-community water

systems (TWSs) for nitrate and nitrite. A definition for transient non-

community water system was not included in the promulgation of the

final rule. This document amends Sec. 141.2 to include a definition of

a transient non-community water system.

This document adds the effective dates for the regulations

promulgated July 17, 1992, and the regulations contained in Subpart I--

Control of Lead and Copper, to Sec. 141.6, the general section on

effective dates for part 141.

This document corrects a reference in Sec. 141.6(h) from

Sec. 141(f)(16) to Sec. 141.24(f)(16).

This document corrects errors in Sec. 141.23(a)(1) and (2) by

revising Sec. 141.23(a)(1) and (2) and Sec. 141.23(c)(1) by replacing

the starting dates with the term ``initial compliance period.'' The

January 1, 1993 starting date listed in the current regulations will

not be valid for future regulations. The ``three year cycle'' in the

current regulations in Sec. 141.23(c) predates the Standardized

Monitoring Framework compliance cycle and needs to be explicitly

consistent with it.

This document adds the Phase V inorganic contaminants (antimony,

beryllium, cyanide, nickel and thallium) to paragraphs

Sec. 141.23(a)(5), Sec. 141.23(f)(1) and Sec. 141.23(i)(2), which refer

to monitoring requirements. The Phase V Federal Register Notice,

specifically 57 FR 31819, indicates that the monitoring requirements

for these contaminants conform to those already listed for the

inorganic contaminants in these paragraphs, and that the intention was

to add them to these paragraphs. These additions were inadvertently

omitted.

This document puts the method title ``Atomic Absorption; Platform''

in the table in Sec. 141.23(a)(4)(i) to be consistent with the way

Table 11 appeared on page 31798 of the preamble to the final Phase V

rule (July 17, 1992). It also deletes footnote 1 which referred to

Appendix A of EPA Method 200.7 since the appendix has been incorporated

in the text of the method; this change is also consistent with how

Table 11 appeared in the preamble.

This document clarifies that States may grant a monitoring waiver

for cyanide if the State determines the system is not vulnerable by

virtue of no proximity to an industrial source of cyanide. The preamble

to the final rule said this clarification was contained in the final

rule but it was omitted.

This document corrects a typographical error in

Sec. 141.23(c)(5)(iii). This document clarifies a statement in

Sec. 141.23(i) (1) and (2) that compliance for each contaminant is

determined separately.

This document corrects a typographical error in Sec. 141.23(i)(1)

by changing the term ``our'' to ``out.''

This document eliminates the paragraph numbered Sec. 141.23(k)(1),

replaces it with the paragraph currently numbered Sec. 141.23(k)(4),

and then renumbers the remaining paragraphs. It also corrects a

typographical error in a table heading in the new Sec. 141.23(k)(1) and

a typographical error in the method applicable to antimony (``Method

220.9'' should be ``Method 200.9'').

The document corrects misspelled words in Sec. 141.23 (q)(3) and

(q)(4), which should both read ``Coupled'', not ``Coupledd'' or

``Couple''.

This document deletes sections describing sampling and analytical

requirements (Sec. 141.24 (a) through (e)), which refer to endrin.

Phase V amended the existing regulations for endrin by deleting the MCL

for endrin from Sec. 141.12 and adding the MCL to Sec. 141.61(c), and

by including sampling and analytical requirements for endrin in

Sec. 141.24(h). These requirements were immediately effective (August

17, 1992). Accordingly, it is clear that the provisions of 141.24 (a)

through (e) were superfluous; they were unintentionally retained and

are now deleted.

This document corrects a typographical error in the designation of

``21'' to ``(21)'' in Sec. 141.24(f)(4).

This document corrects references to ``approved laboratories''

which should refer to ``certified laboratories'' in several sections.

This document corrects Sec. 141.24(f)(7) and Sec. 141.24(f)(10) by

inserting the term ``non-community'' which was mistakenly omitted after

the term ``non-transient''. NTNCWS is a defined term in the regulations

(Sec. 141.2); ``non-transient'' is not a term used in NPDWRs.

This document corrects an omission in Sec. 141.24 (f)(14)(i) and

(h)(10)(i) by specifying the follow-up procedures to be taken when

composite samples exceed the specified level. The paragraph currently

states that, if the results of the composite sample are above specified

levels, a follow-up sample from each of the composite sites must be

taken within 14 days. The paragraph then needs to state that the

follow-up samples need to be analyzed for the contaminants which were

above specified levels. The correct follow-up language appears in

Sec. 141.23(a)(4)(i) for inorganic contaminants but was inadvertently

omitted in Sec. 141.24 on organic contaminants.

This document corrects Sec. 141.24 (f)(14)(iii) by replacing the

text with text consistent with Sec. 141.24(h)(10)(iii), which was the

original intent of the regulations, as discussed on page 31826, column

2 line 1 of the FR, July 17, 1992.

This document completes the citation of a manual in

Sec. 141.24(f)(16) by adding the date of publication of the manual. It

also updates the toll-free telephone number cited in the paragraph.

This document deletes Sec. 141.24(g). These paragraphs are from the

Phase I rule (1987) and refer to the original eight volatile organic

chemicals (VOCs). The preamble from the Phase II rule (1991) states our

intention was to have identical monitoring requirements for all 18

VOCs, as discussed on page 3561, column 2, paragraph c. of the FR,

January 30, 1991. The paragraphs in Sec. 141.24(g) were replaced and

superseded by those in Sec. 141.24(f), but were inadvertently left in

the text and are now deleted.

This document clarifies the intent of Sec. 141.24(h)(4) to specify

that monitoring begins in the ``Initial compliance period.'' Currently,

the regulations specify January 1, 1993, a date which will not be valid

for the next set of regulations.

This document reinserts subparagraphs Sec. 141.24(h)(10)(i), (ii),

and (iii) which were inadvertently deleted by the Phase V FR, July 17,

1992, which did not state that only the introductory text was to be

replaced.

This document corrects an omission in Sec. 141.24(h)(12) to add the

citation to the July 1990 methods manual, which contains the methods

promulgated new with Phase V: Methods 547, 548, 549, 550, and 550.1.

This document also adds a new subparagraph in Sec. 141.24(h)(12) to

cite Method 506 which was discussed in the preamble but omitted from

the rule.

This document corrects Sec. 141.32(e)(62) by replacing the number

``0.004'' with the correct value of ``0.006'', the maximum contaminant

level as established by Sec. 141.61(c).

This document corrects several typographical errors in

Sec. 141.32(e) (30), (33), (35) and (41).

This document corrects the title of Sec. 141.40 to read

``contaminants'' rather than ``chemicals''.

This document makes corrections to Sec. 141.40(e) as

``Chlorobenzene'' is currently regulated as ``Monochlorobenzene'', and

``Dibromomethane'' was mistakenly omitted.

This document corrects an error in Sec. 141.40(g) to cite the

correct version of the methods manual. By deleting the specific

reference to the manual in this paragraph, and referring instead to

Sec. 141.24(f)(16) where the manual is also listed, EPA reduces the

chance in the future that the reference will be updated in one

paragraph but not the other. The telephone number at the end of the

paragraph is also updated.

This document replaces references which have been superseded by

Phase II and Phase V and which should have been revised.

This document deletes 1,2,4-Trichlorobenzene from the list of

unregulated contaminants in Sec. 141.40(j). This contaminant became a

regulated contaminant in regulations promulgated on July 17, 1992 (57

FR 31776) and, therefore, no longer is an unregulated contaminant.

Other contaminants which had previously been listed in Sec. 141.40(j)

were deleted in the July 17, 1992, regulation but 1,2,4-

Trichlorobenzene was overlooked.

This document corrects several typographical errors in the ``List

of Unregulated Organic Contaminants:'' in Sec. 141.40(n)(11) and adds a

reference to where the manuals containing the methods can be found.

This document corrects the effective date of the regulation of

endrin discussed in Sec. 141.60(a)(3) to be consistent with the date

shown in the effective date section at the beginning of the regulation.

This document corrects the table in Sec. 141.61(b), which lists

best available technology for the organic contaminants. The changes

made to Table Sec. 141.61(b) in 57 FR 31846 of July 17, 1992 should

have specified by asterisks that the new table was to be added to the

existing table, and was not to supersede it. The asterisks were

inadvertently omitted, and consequently the rest of the table is

presented as ``superseded text'' in the CFR 40 1993 Edition. This

document merges the two tables and includes all the contaminants in

both tables and the ``OX'' column. The word ``synthetic'' is removed,

since the merged table will include contaminants referred to as

``VOCs'' (volatile organic contaminants) as well as ``SOCs'' (synthetic

organic contaminants).

This document corrects the best available technology listing for

toxaphene and toluene in Sec. 141.61(b) to make them consistent with

the listing in Sec. 142.62(a). It also corrects a typographical error

in the CAS number for glyphosate.

This document corrects the MCL for aldicarb sulfone listed in

Sec. 141.61(c).

This document corrects a typographical error in the spelling of

``ultraviolet'' in Sec. 141.62(c).

This document corrects the best available technology listing for

alachlor and hexachlorobenzene in Sec. 142.62 to be consistent with the

technology listed for these two contaminants in Sec. 141.61, and

corrects the spelling of ``dalapon.''

This document corrects typographical errors in the table headings

identifying best available technologies for achieving compliance with

the maximum contaminant levels for organic chemicals. Packed Tower

Aeration was incorrectly abbreviated as ``PAT'' and Granular Activated

Carbon was incorrectly abbreviated as ``GAO'' in Sec. 142.62(a).

This document corrects a typographical error in the ``Key to BATS

in Table'' in the table entitled ``BAT for Inorganic Compounds Listed

in Section 141.62(B)'' in Sec. 141.62(c). The table title currently has

a superscript ``6'' rather than the word ``Section.''

Economic Analysis

Under Executive Order 12866 (58 FR 51735 (October 4, 1993)), the

Agency must determine whether the regulatory action is ``significant''

and therefore subject to OMB review and the requirements of the

Executive Order. The Order defines ``significant regulatory action'' as

one that is likely to result in a rule that may:

(a) Have an annual effect on the economy of $100 million or more or

adversely affect in a material way the economy, a sector of the

economy, productivity, competition, jobs, the environment, public

health or safety, or State, local, or tribal governments or

communities;

(b) Create a serious inconsistency or otherwise interfere with an

action taken or planned by another agency;

(c) Materially alter the budgetary impact on entitlements, grants,

user fees, or loan programs or the rights and obligations of recipients

thereof; or

(d) Raise novel legal or policy issues arising out of legal

mandates, the President's priorities, or the principles set forth in

the Executive Order.

Because this rule makes only technical corrections to previous

rules, it is not a ``significant regulatory action'' under the terms of

Executive Order 12866 and is, therefore, not subject to OMB review.

Other Requirements

A. Regulatory Flexibility Analysis

The Regulatory Flexibility Act requires EPA to consider the effect

of regulations on small entities (5 U.S.C. 602 et seq.). If there is a

significant economic effect on a substantial number of small entities,

the Agency must prepare a Regulatory Flexibility Analysis (RFA)

describing alternatives that would minimize the impact. The impact of

the requirements corrected and clarified in this rule was assessed at

the time the requirements were imposed. Thus, there is no additional

impact imposed by these regulations, and a Regulatory Flexibility

Analysis is not required.

B. Paperwork Reduction Act

The information collection requirements contained in the Phase I,

II, and V rules were approved by OMB under the Paperwork Reduction Act

(44 U.S.C. 3501 et seq.) at the time the rules were promulgated. No

additional requirements are imposed by these technical amendments.

C. Federalism Review

Executive Order 12612 requires all Federal agencies to consider

legislative and regulatory proposals and other major policy actions to

determine if they have substantial effects on federalism goals and

principles as set forth in the Executive Order. According to EPA's

Guideline for Implementing Executive Order 12612: Federalism, ``[i]f an

EPA action is mandated or the necessary means to carry it out are

implied by statute, then no further federalism assessment is

required.'' The regulations which are being corrected by today's rule

were required by statute. Thus, no federalism assessment was required

to support the original rules or these technical amendments.

List of Subjects in 40 CFR Parts 141 and 142

Environmental protection, Administrative practice and procedure,

Chemicals, Reporting and recordkeeping requirements, Water supply.

Dated: June 21, 1994.

Robert Perciasepe,

Assistant Administrator for Water.

Parts 141 and 142 of Chapter I of Title 40 of the Code of Federal

Regulations are amended as follows:

PART 141--[AMENDED]

1. The authority citation for part 141 continues to read as

follows:

Authority: 42 U.S.C. 300f, 300g-1, 300g-2, 300g-3, 300g-4, 300g-

5, 300g-6, 300j-4, and 300j-9.

Sec. 141.2 [Amended]

2. In Sec. 141.2, in the definition of Initial compliance period,

before ``141.61'' and ``141.62,'' add ``Sec. ''. Also, change the

designation ``Sec. 141.62(b) (11)-(16)'' to ``Sec. 141.62(b) (11)-

(15)''.

3. Sec. 141.2 is amended by adding, in alphabetical order, a

definition for ``Transient non-community water system'' to read as

follows:

Sec. 141.2 Definitions.

* * * * *

Transient non-community water system or TWS means a non-community

water system that does not regularly serve at least 25 of the same

persons over six months per year.

* * * * *

Sec. 141.6 [Amended]

4. In Sec. 141.6, revise paragraph (a) to read as follows:

Sec. 141.6 Effective dates.

(a) Except as provided in paragraphs (a) through (h) of this

section, and in Sec. 141.80(a)(2), the regulations set forth in this

part shall take effect on June 24, 1977.

* * * * *

5. In Sec. 141.6(h), revise the reference ``Sec. 141(f)(16)'' to

read ``Sec. 141.24(f)(16)''.

Sec. 141.23 [Amended]

6. In Sec. 141.23 revise paragraphs (a)(1), (a)(2) including the

note, and (a)(5) to read as follows:

Sec. 141.23 Inorganic chemical sampling and analytical requirements.

* * * * *

(a) * * *

(1) Groundwater systems shall take a minimum of one sample at every

entry point to the distribution system which is representative of each

well after treatment (hereafter called a sampling point) beginning in

the initial compliance period. The system shall take each sample at the

same sampling point unless conditions make another sampling point more

representative of each source or treatment plant.

(2) Surface water systems shall take a minimum of one sample at

every entry point to the distribution system after any application of

treatment or in the distribution system at a point which is

representative of each source after treatment (hereafter called a

sampling point) beginning in the initial compliance period. The system

shall take each sample at the same sampling point unless conditions

make another sampling point more representative of each source or

treatment plant.

Note: For purposes of this paragraph, surface water systems

include systems with a combination of surface and ground sources.

* * * * *

(5) The frequency of monitoring for asbestos shall be in accordance

with paragraph (b) of this section: the frequency of monitoring for

antimony, barium, beryllium, cadmium, chromium, cyanide, fluoride,

mercury, nickel, selenium and thallium shall be in accordance with

paragraph (c) of this section; the frequency of monitoring for nitrate

shall be in accordance with paragraph (d) of this section; and the

frequency of monitoring for nitrite shall be in accordance with

paragraph (e) of this section.

* * * * *

7. In the table in Sec. 141.23(a)(4)(i), add immediately below

``Atomic Absorption; Furnace'' in the third column for ``Antimony''

``Nickel'' and ``Thallium'' the words ``Atomic Absorption; Platform'';

in the third column for ``Beryllium'' remove ``xl'' and add the words

``Atomic Absorption; Platform''; remove footnote 1; and redesignate

footnotes 2 through 6 as footnotes 1 through 5.

8. In Sec. 141.23(c)(1), delete the phrase ``once every three

years'' and substitute ``during each compliance period''.

9. In Sec. 141.23, add a sentence to the end of paragraph (c)(2) to

read as follows:

* * * * *

(c)* * *

(2) * * * States may grant a public water system a waiver for

monitoring of cyanide, provided that the State determines that the

system is not vulnerable due to lack of any industrial source of

cyanide.

* * * * *

10. In Sec. 141.23(c)(5)(iii), revise the word ``prcoedures'' to

read ``procedures''.

11. In Sec. 141.23, revise paragraph (f)(1) to read as follows:

* * * * *

(f) * * *

(1) Where the results of sampling for asbestos, antimony, barium,

beryllium, cadmium, chromium, cyanide, fluoride, mercury, nickel,

selenium or thallium indicate an exceedance of the maximum contaminant

level, the State may require that one additional sample be collected as

soon as possible after the initial sample was taken (but not to exceed

two weeks) at the same sampling point.

* * * * *

12. In Sec. 141.23(i)(1), in the first sentence revise the phrase

``and thallium'' to read ``or thallium'' and, in the second sentence

revise the word ``our'' to read ``out''.

13. In Sec. 141.23(i)(2), revise the first sentence to read:

(i) * * *

(2) For systems which are monitoring annually, or less frequently,

the system is out of compliance with the maximum contaminant levels for

asbestos, antimony, barium, beryllium, cadmium, chromium, cyanide,

fluoride, mercury, nickel, selenium or thallium if the level of a

contaminant at any sampling point is greater than the MCL. * * *

* * * * *

14. Sec. 141.23 is amended by removing paragraph (k)(1) and

redesignating paragraph (k)(4) as paragraph (k)(1), paragraph (k)(5) as

paragraph (k)(4), and paragraph (k)(6) as paragraph (k)(5).

15. In the table headings in newly designated Sec. 141.23(k)(1), in

the second column, revise the word ``Methodogy'' to read

``Methodology''. In the table, in the third column, for Antimony,

Atomic Absorption; Platform revise ``220.9'' to read ``200.9''.

16. In Sec. 141.23(q)(3), remove the second ``d'' at the end of the

word ``Coupledd''. In Sec. 141.23(q)(4), add a ``d'' to the end of the

word ``Couple''.

Sec. 141.24 [Amended]

17. In Sec. 141.24, remove and reserve paragraphs (a) through (e).

18. In Sec. 141.24(f)(4), revise the number ``21'' to read

``(21)''.

19. In Sec. 141.24(f)(7) and (f)(10), in the first sentence after

the word ``non-transient'', add ``non-community''.

20. In Sec. 141.24(f)(20), revise the reference to ``approved

laboratory'' to read ``certified laboratory''.

21. In Sec. 141.24, revise paragraphs (f)(14)(i) and (f)(14)(iii)

to read as follows:

* * * * *

(f) * * *

(14) * * *

(i) If the concentration in the composite sample is greater than or

equal to 0.0005 mg/l for any contaminant listed in Sec. 141.61(a), then

a follow-up sample must be taken within 14 days at each sampling point

included in the composite, and be analyzed for that contaminant.

* * * * *

(iii) If the population served by the system is > 3,300 persons,

then compositing may only be permitted by the State at sampling points

within a single system. In systems serving 3,300 persons,

the State may permit compositing among different systems provided the

5-sample limit is maintained.

* * * * *

22. In Sec. 141.24(f)(16), after ``EPA/600/4-88/039,'' add

``December 1988, Revised July 1991''. Also, revise the toll-free

telephone number at the end of the paragraph from ``800-336-4700'' to

read ``800-553-6847''.

23. In Sec. 141.24, remove and reserve paragraph (g).

24. In Sec. 141.24, revise paragraph (h)(4)(i) to read as follows:

* * * * *

(h) * * *

(4) * * *

(i) Each community and non-transient non-community water system

shall take four consecutive quarterly samples for each contaminant

listed in Sec. 141.61(c) during each compliance period beginning with

the initial compliance period.

* * * * *

25. In Sec. 141.24, add paragraphs (h)(10)(i), (h)(10)(ii), and

(h)(10)(iii) to read as follows:

* * * * *

(h) * * *

(10) * * *

(i) If the concentration in the composite sample detects one or

more contaminants listed in Sec. 141.61(c), then a follow-up sample

must be taken within 14 days at each sampling point included in the

composite, and be analyzed for that contaminant.

(ii) If duplicates of the original sample taken from each sampling

point used in the composite are available, the system may use these

duplicates instead of resampling. The duplicate must be analyzed and

the results reported to the State within 14 days of collection.

(iii) If the population served by the system is >3,300 persons,

then compositing may only be permitted by the State at sampling points

within a single system. In systems serving 3,300 persons,

the State may permit compositing among different systems provided the

5-sample limit is maintained.

* * * * *

26. In Sec. 141.24, revise paragraph (h)(12) introductory text and

add paragraph (h)(12)(xv) to read as follows:

* * * * *

(h) * * *

(12) Analysis for the contaminants listed in Sec. 141.61(c) and for

endrin in Sec. 141.12(a) shall be conducted using the following EPA

methods or their equivalent as approved by EPA. These methods are

contained in ``Methods for the Determination of Organic Compounds in

Drinking Water,'' EPA/600/4-88/039, December 1988, Revised July 1991

and in ``Methods for the Determination of Organic Compounds in Drinking

Water--Supplement I'', EPA/600/4-90/020, July 1990, and ``Supplement

II'', EPA/600/R-92/129, August 1992, Environmental Monitoring Systems

Laboratory, Cincinnati, OH 45268. These documents are available from

the National Technical Information Service (NTIS) NTIS PB91-231480,

PB91-146027 and PB92-207703, U.S. Department of Commerce, 5285 Port

Royal Road, Springfield, Virginia 22161. The NTIS toll-free number is

1-800-553-6847.

* * * * *

(xv) Method 506, ``Determination of Phthalate and Adipate Esters in

Drinking Water by Liquid-Liquid Extraction or Liquid-Solid Extraction

and Gas Chromatography with Photoionization Detection.'' Method 506 can

be used to measure di(2-ethylhexyl) adipate and di(2-ethylhexyl)

phthalate.

* * * * *

Sec. 141.28 [Amended]

27. In Sec. 141.28, remove ``Approved laboratories'' in the heading

and add ``Certified laboratories'', and remove ``laboratory approved''

in paragraph (a) and add ``laboratory certified''.

Sec. 141.32 [Amended]

28. In Sec. 141.32(e)(30), the second sentence should be revised to

read ``This organic chemical is a pesticide used to control

termites.''.

29. In Sec. 141.32(e)(33), the last sentence should be revised to

read ``Drinking water that meets the EPA standard is associated with

little to none of this risk and is considered safe with respect to cis-

1,2-dichloroethylene.''.

30. In Sec. 141.32(e)(35), the word ``ruroff'' in the third

sentence should be revised to read ``runoff''.

31. In Sec. 141.32(e)(41), the word ``eposure'' in the first

sentence should be revised to read ``exposure''.

32. In Sec. 141.32(e)(62), before the word ``parts'', revise the

number ``0.004'' to read ``0.006''.

Sec. 141.40 [Amended]

33. In the title of Sec. 141.40, revise the word ``chemicals'' to

read ``contaminants''.

34. In Sec. 141.40(e)(5), revise the word ``Chlorobenzene'' to read

``Dibromomethane''.

35. In Sec. 141.40, revise paragraph (g) to read as follows:

Sec. 141.40 Special monitoring for inorganic and organic contaminants.

* * * * *

(g) Analysis for the organic contaminants in paragraphs (e) and (j)

of this section shall be conducted using the recommended EPA methods,

or their equivalent as determined by EPA. These methods are contained

in the reference at Sec. 141.24(f)(16).

* * * * *

36. In Sec. 141.40(h), remove ``laboratories approved'' and add

``laboratories certified''; remove ``Sec. 141.24(g)(11)'' and add

``Sec. 141.24(f)(17)''.

37. In 141.40, remove paragraph (j)(2) and redesignate the

remaining paragraphs (j)(3) through (j)(15) as paragraphs (j)(2)

through (j)(14).

38. In Sec. 141.40, revise paragraph (n)(11) to read as follows:

* * * * *

(n) * * *

(11) The listed methods are in the manuals cited at

Sec. 141.24(h)(12). List of Unregulated Organic Contaminants:

------------------------------------------------------------------------

Organic contaminants EPA analytical method

------------------------------------------------------------------------

Aldicarb........................... 531.1

Aldicarb sulfone................... 531.1

Aldicarb sulfoxide................. 531.1

Aldrin............................. 505, 508, and 525.1

Butachlor.......................... 507, 525.1

Carbaryl........................... 531.1

Dicamba............................ 515.1

Dieldrin........................... 505, 508, 525.1

3-hydroxycarbofuran................ 531.1

Methomyl........................... 531.1

Metolachlor........................ 507, 525.1

Metribuzin......................... 507, 525.1

Propachlor......................... 508, 525.1

------------------------------------------------------------------------

* * * * *

Sec. 141.60 [Amended]

39. In Sec. 141.60, revise paragraph (a)(3) to read as follows:

Sec. 141.60 Effective dates.

(a) * * *

(3) The effective date for paragraphs (a)(19) through (a)(21),

(c)(19) through (c)(25), and (c)(27) through (c)(33) of Sec. 141.61 is

January 17, 1994. The effective date of Sec. 141.61(c)(26) is August

17, 1992.

* * * * *

Sec. 141.61 [Amended]

40. In the text preceding the table in Sec. 141.61(b), remove the

word ``synthetic''.

41. In Sec. 141.61(b), revise the table to read as follows:

Sec. 141.61 Maximum contaminant levels for organic contaminants.

* * * * *

(b) * * *

BAT for Organic Contaminants Listed in Sec. 141.61 (a) and (c)

----------------------------------------------------------------------------------------------------------------

CAS No. Contaminant GAC PTA OX

----------------------------------------------------------------------------------------------------------------

15972-60-8...................... Alachlor........................................ X ........ ........

116-06-3........................ Aldicarb........................................ X ........ ........

1646-88-4....................... Aldicarb sulfone................................ X ........ ........

1646-87-3....................... Aldicarb sulfoxide.............................. X ........ ........

1912-24-9....................... Atrazine........................................ X ........ ........

71-43-2......................... Benzene......................................... X X ........

50-32-8......................... Benzo[a]pyrene.................................. X ........ ........

1563-66-2....................... Carbofuran...................................... X ........ ........

56-23-5......................... Carbon tetrachloride............................ X X ........

57-74-9......................... Chlordane....................................... X ........ ........

75-99-0......................... Dalapon......................................... X ........ ........

94-75-7......................... 2,4-D........................................... X ........ ........

103-23-1........................ Di (2-ethylhexyl) adipate....................... X X ........

117-81-7........................ Di (2-ethylhexyl) phthalate..................... X ........ ........

96-12-8......................... Dibromochloropropane (DBCP)..................... X X ........

95-50-1......................... o-Dichlorobenzene............................... X X ........

106-46-7........................ para-Dichlorobenzene............................ X X ........

107-06-2........................ 1,2-Dichloroethane.............................. X X ........

75-35-4......................... 1,1-Dichloroethylene............................ X X ........

156-59-2........................ cis-1,2-Dichloroethylene........................ X X ........

156-60-5........................ trans-1,2-Dichloroethylene...................... X X ........

75-09-2......................... Dichloromethane................................. ........ X ........

78-87-5......................... 1,2-Dichloropropane............................. X X ........

88-85-7......................... Dinoseb......................................... X ........ ........

85-00-7......................... Diquat.......................................... X ........ ........

145-73-3........................ Endothall....................................... X ........ ........

72-20-8......................... Endrin.......................................... X ........ ........

100-41-4........................ Ethylbenzene.................................... X X ........

106-93-4........................ Ethylene Dibromide (EDB)........................ X X ........

1071-83-6....................... Gylphosate...................................... ........ ........ X

76-44-8......................... Heptachlor...................................... X ........ ........

1024-57-3....................... Heptachlor epoxide.............................. X ........ ........

118-74-1........................ Hexachlorobenzene............................... X ........ ........

77-47-3......................... Hexachlorocyclopentadiene....................... X X ........

58-89-9......................... Lindane......................................... X ........ ........

72-43-5......................... Methoxychlor.................................... X ........ ........

108-90-7........................ Monochlorobenzene............................... X X ........

23135-22-0...................... Oxamyl (Vydate)................................. X ........ ........

87-86-5......................... Pentachlorophenol............................... X ........ ........

1918-02-1....................... Picloram........................................ X ........ ........

1336-36-3....................... Polychlorinated biphenyls (PCB)................. X ........ ........

122-34-9........................ Simazine........................................ X ........ ........

100-42-5........................ Styrene......................................... X X ........

1746-01-6....................... 2,3,7,8-TCDD (Dioxin)........................... X ........ ........

127-18-4........................ Tetrachloroethylene............................. X X ........

108-88-3........................ Toluene......................................... X X ........

8001-35-2....................... Toxaphene....................................... X ........ ........

93-72-1......................... 2,4,5-TP (Silvex)............................... X ........ ........

120-82-1........................ 1,2,4-Trichlorobenzene.......................... X X ........

71-55-6......................... 1,1,1-Trichloroethane........................... X X ........

79-00-5......................... 1,1,2-Trichloroethane........................... X X ........

79-01-6......................... Trichloroethylene............................... X X ........

75-01-4......................... Vinyl chloride.................................. ........ X ........

1330-20-7....................... Xylene.......................................... X X ........

----------------------------------------------------------------------------------------------------------------

* * * * *

42. In Sec. 141.61(c), in the table, revise the number ``0.003'' in

the MCL column for the entry ``(4) 1646-87-4 Aldicarb sulfone'' to read

``0.002''.

Sec. 141.62 [Amended]

43. In Sec. 141.62(c), in key 11 under the table, revise

``Ultraviolent'' to read ``Ultraviolet''.

PART 142--[AMENDED]

44. The authority citation for part 142 continues to read as

follows:

Authority: 42 U.S.C. 300g, 300g-1, 300g-2, 300g-3, 300g-4, 300g-

5, 300g-6, 300j-4, and 300j-9.

Sec. 142.62 [Amended]

45. The table in Sec. 142.62(a) is amended as follows:

a. In the Best available technologies subheadings, revise ``PAT''

to read ``PTA'' and revise ``GAO'' to read ``GAC'';

b. In the entry for ``(19) Alachlor'', remove the ``X'' in the

``PTA'' column;

c. In entry (38), in the contaminant column, revise ``Dalapone'' to

read ``Dalapon''; and

d. In the entry for ``(47) Hexachlorobenzene'', remove the ``X''

from the ``OX'' column and add the ``X'' to the ``GAC'' column.

[FR Doc. 94-16076 Filed 6-30-94; 8:45 am]

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