**Appendix J**

> **Primacy Revision Crosswalks**

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**[Primacy Revision Crosswalk for the Arsenic Rule]{.smallcaps}**

<table style="width:100%;">
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<col style="width: 19%" />
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</colgroup>
<thead>
<tr class="header">
<th colspan="8"><strong><span class="smallcaps">Federal
Requirement</span></strong></th>
<th><strong><span class="smallcaps">Federal
Citation</span></strong></th>
<th><strong><span class="smallcaps">State Citation (Document title, Page
number, Section/paragraph)</span></strong></th>
<th><strong><span class="smallcaps">Different from fed. requirement?
Explain on separate sheet</span></strong></th>
</tr>
</thead>
<tbody>
<tr class="odd">
<td colspan="8"><strong><span class="smallcaps">Subpart A</span>C<span
class="smallcaps">General</span></strong></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="11"><strong>'141.6 <span class="smallcaps">Effective
dates</span></strong></td>
</tr>
<tr class="odd">
<td colspan="8">The arsenic MCL listed in '141.62 is effective for the
purpose of compliance on January 23, 2006. Requirements relating to
arsenic set forth in Secs. 141.23(i)(4), 141.23(k)(3) introductory text,
141.23(k)(3)(ii), 141.51(b), 141.62(b), 141.62(b)(16), 141.62(c),
141.62(d), and 142.62(b) revisions in Appendix A of subpart O for the
consumer confidence rule, and Appendices A and B of subpart Q for the
public notification rule are effective for the purpose of compliance on
January 23, 2006. However, the consumer confidence rule reporting
requirements relating to arsenic listed in Sec. 141.154(b) and (f) are
effective for the purpose of compliance on February 22, 2002.</td>
<td>'141.6(j)</td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8">Regulations set forth in Secs. 141.23(i)(1),
141.23(i)(2), 141.24(f)(15), 141.24(f)(22), 141.24(h)(11),
141.24(h)(20), 142.16(e), 142.16(j), and 142.16(k) are effective for the
purpose of compliance on January 22, 2004. [Regulation should have
included 141.29(c)(9); unintentional omission; optional.]</td>
<td>'141.6 (k)</td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="11"><strong><span class="smallcaps">Subpart C</span>C<span
class="smallcaps">Monitoring and Analytical
Requirements</span></strong></td>
</tr>
<tr class="even">
<td colspan="11"><strong>'141.23 <span class="smallcaps">Inorganic
chemical sampling and analytical requirements</span></strong></td>
</tr>
<tr class="odd">
<td colspan="8"><p>Contaminant MCL Methodology Detection Limit</p>
<p>Arsenic 0.010<sup>6</sup> Atomic Absorption;</p>
<blockquote>
<p>Furnace 0.001</p>
<p>Atomic Absorption;</p>
<p>Platform-Stabilized</p>
<p>Temperature 0.0005<sup>7</sup></p>
<p>Atomic Absorption;</p>
<p>Gaseous Hydride 0.001</p>
<p>ICP-Mass Spectrometry 0.0014<sup>8</sup></p>
</blockquote></td>
<td><p>Table to</p>
<p>'141.23(a)(4)(i)</p></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8"><p><sup>6</sup> The value for arsenic is effective
January 23, 2006. Until then, the MCL is 0.05 mg/L.</p>
<p><sup>7</sup> The MDL reported for EPA Method 200.9 (Atomic
Absorption; Platform - Stabilized Temperature) was determined using a 2x
concentration step during sample digestion. The MDL determined for
samples analyzed using direct analyses (i.e. no sample digestion) will
be higher. Using multiple depositions, EPA 200.9 is capable of obtaining
MDL of 0.0001 mg/L.</p>
<p><sup>8</sup> Using selective ion monitoring, EPA method 200.8
(ICP-MS) is capable of obtaining a MDL of 0.0001 mg/L.</p></td>
<td><p>Footnotes to Table in</p>
<p>'141.23(a)(4)(i)</p></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8">The frequency of monitoring for arsenic shall be in
accordance with paragraph (c) of this section. [Waiver provision;
optional.]</td>
<td>'141.23(a)(5)</td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8">The frequency of monitoring conducted to determine
compliance with the maximum contaminant levels in '141.62 for arsenic
shall be as follows: [Waiver provision; optional.]</td>
<td>'141.23(c)</td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8">All new systems or systems that use a new source of
water that begin operation after January 22, 2004, must demonstrate
compliance with the MCL within a period of time specified by the State.
The system must also comply with the initial sampling frequencies
specified by the State to ensure a system can demonstrate compliance
with the MCL. Routine and increased monitoring frequencies shall be
conducted in accordance with the requirements in this section.</td>
<td>'141.23(c)(9)</td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8">Where the results of sampling for arsenic 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.</td>
<td>'141.23(f)(1)</td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8">For systems which are conducting monitoring at a
frequency greater than annual, compliance with the maximum contaminant
levels for arsenic is determined by a running annual average at any
sampling point. If the average at any sampling point is greater than the
MCL, then the system is out of compliance. If any one sample would cause
the annual average to be exceeded, then the system is out of compliance
immediately. Any sample below the method detection limit shall be
calculated at zero for the purpose of determining the annual average. If
a system fails to collect the required number of samples, compliance
(average concentration) will be based on the total number of samples
collected.</td>
<td>'141.23(i)(1)</td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8">For systems which are monitoring annually, or less
frequently, the system is out of compliance with the maximum contaminant
level for arsenic if the level of a contaminant is greater than the MCL.
If confirmation samples are required by the State, the determination of
compliance will be based on the annual average of the initial MCL
exceedance and any State-required confirmation samples. If a system
fails to collect the required number of samples, compliance (average
concentration) will be based on the total number of samples
collected.</td>
<td>'141.23(i)(2)</td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8">Arsenic sampling results will be reported to the nearest
0.001 mg/L.</td>
<td>'141.23(i)(4)</td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td>Contaminant</td>
<td colspan="4">Methodology <sup>13</sup></td>
<td>EPA</td>
<td>ASTM <sup>3</sup></td>
<td>SM <sup>4</sup></td>
<td rowspan="6"><p>Table to</p>
<p>'141.23(k)(1)</p></td>
<td rowspan="6"></td>
<td rowspan="6"></td>
</tr>
<tr class="odd">
<td>Arsenic<sup>14</sup></td>
<td colspan="4">Inductively Coupled Plasma<sup>15</sup></td>
<td><sup>2</sup>200.7</td>
<td></td>
<td>3120B</td>
</tr>
<tr class="even">
<td></td>
<td colspan="4">ICP-Mass Spectrometry</td>
<td><sup>2</sup>200.8</td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4">Atomic Adsorption; Platform</td>
<td><sup>2</sup>200.9</td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td></td>
<td colspan="4">Atomic Adsorption; Furnace</td>
<td></td>
<td>D-2972-93C</td>
<td>3113B</td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4">Hydride Atomic Adsorption</td>
<td></td>
<td>D-2972-93B</td>
<td>3114B</td>
</tr>
<tr class="even">
<td colspan="8"><sup>14</sup>If ultrasonic nebulization is used in the
determination of arsenic by Methods 200.7, 200.8, or SM 3120 B, the
arsenic must be in the pentavalent state to provide uniform signal
response. For methods 200.7 and 3120 B, both samples and standards must
be diluted in the same mixed acid matrix concentration of nitric and
hydrochloric acid with the addition of 100 L of 30% hydrogen peroxide
per 100 ml of solution. For direct analysis of arsenic with method 200.8
using ultrasonic nebulization, samples and standards must contain one
mg/L of sodium hypochlorite.</td>
<td><p>Footnotes to Table to</p>
<p>'141.23(k)(1)</p></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8">Sample collection for arsenic under this section shall
be conducted using the sample preservation, container, and maximum
holding time procedures specified below:</td>
<td>'141.23(k)(2)</td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8"><p>Contaminant Preservative<sup>1</sup>
Container<sup>2</sup> Time<sup>3</sup></p>
<p>Arsenic Conc HNO<sub>3</sub> to pH&lt;2 P or G 6 mo.</p>
<p><sup>1</sup> For cyanide determinations samples must be adjusted with
sodium hydroxide to pH 12 at the time off collection. When chilling is
indicated the sample must be shipped and stored at 4 deg. C or less.
Acidification of nitrate or metals samples may be with a concentrated
acid or a dilute (50% by volume) solution of the applicable concentrated
acid. Acidification of samples for metals analysis is encouraged and
allowed at the laboratory rather than at the time of sampling provided
the shipping time and other instructions in Section 8.3 of EPA Methods
200.7 or 200.8 or 200.9 are followed.</p>
<p><sup>2</sup> P = plastic, hard or soft; G=glass, hard or soft.</p>
<p><sup>3</sup> In all cases samples should be analyzed as soon after
collection as possible.</p>
<p>Follow additional (if any) information on preservation, containers,
or holding times that is specified in method.</p></td>
<td><p>Table to</p>
<p>'141.23(k)(2)</p></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8"><p>[Analysis under this section shall only be conducted
by laboratories that have been certified by EPA or the State.]</p>
<p>To receive certification to conduct analyses for arsenic, the
laboratory must:</p></td>
<td>'141.23(k)(3)</td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8">[Achieve quantitative results on the analyses that are
within the following acceptance limits:]</td>
<td><p>['141.23</p>
<p>(k)(3)(ii)]</p></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8"><p>Contaminant Acceptance Limit</p>
<p>Arsenic 30 at 0.003 mg/L</p>
<p>[Some States adopt this by reference; if so, States should submit
necessary paperwork.]</p></td>
<td><p>Table to</p>
<p>'141.23(k)(3)(ii)</p></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="11"><strong>'141.24 <span class="smallcaps">Organic
chemicals other than total trihalomethanes, sampling and analytical
methods</span></strong></td>
</tr>
<tr class="odd">
<td colspan="8">Systems monitoring annually or less frequently whose
sample result exceeds the MCL must begin quarterly sampling. The system
will not be considered in violation of the MCL until it has completed
one year of quarterly sampling.</td>
<td><p>'141.24</p>
<p>(f)(15)(ii)</p></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8">If a system fails to collect the required number of
samples, compliance will be based on the total number of samples
collected.</td>
<td><p>'141.24</p>
<p>(f)(15)(iv)</p></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8">If a sample result is less than the detection limit,
zero will be used to calculate the annual average.</td>
<td><p>'141.24</p>
<p>(f)(15)(v)</p></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8">All new systems or systems that use a new source of
water that begin operation after January 22, 2004, must demonstrate
compliance with the MCL within a period of time specified by the State.
The system must also comply with the initial sampling frequencies
specified by the State to ensure a system can demonstrate compliance
with the MCL. Routine and increased monitoring frequencies shall be
conducted in accordance with the requirements in this section.</td>
<td>'141.24(f)(22)</td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8">Systems monitoring annually or less frequently whose
sample result exceeds the regulatory detection level as defined by
paragraph (h)(18) of this section must begin quarterly sampling. The
system will not be considered in violation of the MCL until it has
completed one year of quarterly sampling.</td>
<td><p>'141.24</p>
<p>(h)(11)(ii)</p></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8">If a system fails to collect the required number of
samples, compliance will be based on the total number of samples
collected.</td>
<td><p>'141.24</p>
<p>(h)(11)(iv)</p></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8">All new systems or systems that use a new source of
water that begin operation after January 22, 2004, must demonstrate
compliance with the MCL within a period of time specified by the State.
The system must also comply with the initial sampling frequencies
specified by the State to ensure a system can demonstrate compliance
with the MCL. Routine and increased monitoring frequencies shall be
conducted in accordance with the requirements in this section.</td>
<td>'141.24(h)(20)</td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="11"><strong><span class="smallcaps">Subpart F</span>C<span
class="smallcaps">Maximum Contaminant Level Goals</span></strong></td>
</tr>
<tr class="odd">
<td colspan="11"><strong>'141.51 <span class="smallcaps">Maximum
contaminant level goals for inorganic contaminants</span></strong></td>
</tr>
<tr class="even">
<td colspan="8"><p>Contaminant MCLG (mg/L)</p>
<p>Arsenic zero<sup>1</sup></p></td>
<td><p>Table to</p>
<p>'141.51(b)</p></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8"><sup>1</sup> This value for arsenic is effective January
23, 2006. Until then, there is no MCLG.</td>
<td><p>Footnote to Table to</p>
<p>'141.51(b)</p></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="11"><strong><span class="smallcaps">Subpart G</span>C<span
class="smallcaps">National Revised Primary Drinking Water Regulations:
Maximum Contaminant Levels</span></strong></td>
</tr>
<tr class="odd">
<td colspan="11"><strong>'141.60 <span class="smallcaps">Effective
dates</span></strong></td>
</tr>
<tr class="even">
<td colspan="8">The effective date for '141.62(b)(16) is January 23,
2006.</td>
<td>'141.60(b)(4)</td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="11"><strong>'141.62 <span class="smallcaps">MCLs for
inorganic contaminants</span></strong></td>
</tr>
<tr class="even">
<td colspan="8">The maximum contaminant levels for inorganic
contaminants specified in paragraphs (b)(2)-(6), (b)(10), and
(b)(11)-(16) of this section apply to community water systems and
non-transient, non-community water systems.</td>
<td>'141.62(b)</td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8"><p>Contaminant MCL (mg/L)</p>
<p>(16) Arsenic 0.010</p></td>
<td><p>Table to</p>
<p>'141.62(b)</p></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8"><p><strong>BAT for Inorganic Compounds Listed in Section
141.62(B)</strong> [Variances; optional.]</p>
<p>Chemical name BAT(s)</p>
<p>Arsenic<sup>4</sup> 1, 2, 5, 6, 7, 9, 12<sup>5</sup></p></td>
<td><p>Table to</p>
<p>'141.62(c)</p></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8"><p>4. BATs for Arsenic V. Pre-oxidation may be required
to convert Arsenic III to Arsenic V. [Variances; optional.]</p>
<p>5. To obtain high removals, iron to arsenic ratio must be at least
20:1. [Variances; optional.]</p></td>
<td><p>Footnotes to Table to</p>
<p>'141.62(c)</p></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8"><p><em>Key to BATs in Table</em> [Variances;
optional.]</p>
<p>1 = Activated Alumina</p>
<p>2 = Coagulation/Filtration (not BAT for systems &lt;500 service
connections)</p>
<p>5 = Ion Exchange</p>
<p>6 = Lime Softening (not BAT for systems &lt;500 service
connections)</p>
<p>7 = Reverse Osmosis</p>
<p>9 = Electrodialysis</p>
<p>12 = Oxidation/Filtration</p></td>
<td><p>Key to BAT=s in Table to</p>
<p>'141.62(c)</p></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="11"><strong><span class="smallcaps">Subpart O</span>C<span
class="smallcaps">Consumer Confidence Reports</span></strong></td>
</tr>
<tr class="even">
<td colspan="11"><strong>'141.154</strong> <strong><span
class="smallcaps">Required additional health
information</span></strong></td>
</tr>
<tr class="odd">
<td colspan="8">Ending in the report due by July 1, 2001, a system which
detects arsenic at levels above 0.025 mg/L, but below the 0.05 mg/L, and
beginning in the report due by July 1, 2002, a system that detects
arsenic above 0.005 mg/L and up to and including 0.010 mg/L:</td>
<td>'141.154(b)</td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8">Must include in its report a short informational
statement about arsenic, using language such as: While your drinking
water meets EPA's standard for arsenic, it does contain low levels of
arsenic. EPA's standard balances the current understanding of arsenic's
possible health effects against the costs of removing arsenic from
drinking water. EPA continues to research the health effects of low
levels of arsenic, which is a mineral known to cause cancer in humans at
high concentrations and is linked to other health effects such as skin
damage and circulatory problems.</td>
<td>'141.154(b)(1)</td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8">Beginning in the report due by July 1, 2002, and ending
January 22, 2006, a community water system that detects arsenic above
0.010 mg/L and up to and including 0.05 mg/L must include the arsenic
health effects language prescribed by Appendix A to Subpart O.</td>
<td>'141.154(f)</td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="11"><strong><span class="smallcaps">Appendix A to Subpart O
- Regulated Contaminants</span></strong></td>
</tr>
<tr class="odd">
<td>Contaminant (units)</td>
<td>Traditional MCL in mg/L</td>
<td colspan="2">To convert for CCR, multiply by</td>
<td>MCL in CCR units</td>
<td>MCLG</td>
<td>Major sources in drinking water</td>
<td>Health effects language</td>
<td rowspan="3"><p>Table to</p>
<p>Appendix A to</p>
<p>Subpart O</p></td>
<td rowspan="3"></td>
<td rowspan="3"></td>
</tr>
<tr class="even">
<td>Inorganic contaminants:</td>
<td></td>
<td colspan="2"></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td>Arsenic (ppb)</td>
<td><sup>1</sup>0.010</td>
<td colspan="2">1000</td>
<td><sup>1</sup>10</td>
<td><sup>1</sup>0</td>
<td>Erosion of natural deposits; Runoff from orchards; runoff from glass
and electronics production wastes.</td>
<td>Some people who drink water containing arsenic in excess of the MCL
over many years could experience skin damage or problems with their
circulatory system, and may have an increased risk of getting
cancer.</td>
</tr>
<tr class="even">
<td colspan="8">1. These arsenic values are effective January 23, 2006.
Until then, the MCL is 0.05 mg/L and there is no MCLG.</td>
<td><p>Footnotes to Table to</p>
<p>Appendix A</p></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="11"><strong><span class="smallcaps">Subpart Q</span>C<span
class="smallcaps">Public Notification</span></strong></td>
</tr>
<tr class="even">
<td colspan="11"><strong><span class="smallcaps">Appendix A to Subpart
Q-NPDWR Violations and Other Situations Requiring Public
Notice<sup>1</sup></span></strong></td>
</tr>
<tr class="odd">
<td></td>
<td colspan="4"><strong>MCL/MRDL/TT violations<sup>2</sup></strong></td>
<td colspan="3"><strong>Monitoring &amp;testing procedure
violations</strong></td>
<td rowspan="4"><p>Appendix A to Subpart Q,</p>
<p>I.B.2</p></td>
<td rowspan="4"></td>
<td rowspan="4"></td>
</tr>
<tr class="even">
<td></td>
<td colspan="2">Tier of public notice required</td>
<td colspan="2">Citation</td>
<td colspan="2">Tier of public notice required</td>
<td>Citation</td>
</tr>
<tr class="odd">
<td>B. Inorganic Chemicals (IOCs)</td>
<td colspan="2"></td>
<td colspan="2"></td>
<td colspan="2"></td>
<td></td>
</tr>
<tr class="even">
<td>2. Arsenic</td>
<td colspan="2">2</td>
<td colspan="2"><sup>8</sup>141.62(b)</td>
<td colspan="2">3</td>
<td><sup>9</sup>141.23 (a), (c)</td>
</tr>
<tr class="odd">
<td colspan="8">Redesignate endnotes 8 through 17 as endnotes 10 through
19 in the table and at the end of the table.</td>
<td><p>Appendix A to Subpart Q,</p>
<p>I.B.2</p></td>
<td></td>
<td></td>
</tr>
<tr class="even">
<td colspan="8"><p>8. The arsenic MCL citations are effective January
23, 2006. Until then, the citations are Sec. 141.11(b) and Sec.
141.23(n).</p>
<p>9. The arsenic Tier 3 violation MCL citations are effective January
23, 2006. Until then, the citations are Sec. 141.23(a), (l).</p></td>
<td><p>Footnotes to Appendix A</p>
<p>I.B.2</p></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="11"><strong><span class="smallcaps">Appendix B to Subpart
Q-Standard Health Effects Language for Public
Notification</span></strong></td>
</tr>
<tr class="even">
<td colspan="8"><p>Contaminant Arsenic<sup>11</sup></p>
<p>MCLG<sup>1</sup> (mg/L) 0</p>
<p>MCL<sup>2</sup> (mg/L) 0.010</p>
<p>Standard health effects language for public notification:</p>
<p>Some people who drink water containing arsenic in excess of the MCL
over many years could experience skin damage or problems with their
circulatory system, and may have an increased risk of getting
cancer.</p></td>
<td><p>Table to</p>
<p>Appendix B to</p>
<p>Subpart Q</p></td>
<td></td>
<td></td>
</tr>
<tr class="odd">
<td colspan="8"><p>1. MCLG-Maximum contaminant level goal.</p>
<p>2. MCL-Maximum contaminant level.</p>
<p>11. These arsenic values are effective January 23, 2006. Until then,
the MCL is 0.05 mg/L and there is no MCLG.</p></td>
<td><p>Footnotes to Table to</p>
<p>Appendix B to</p>
<p>Subpart Q</p></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>

+-----------------------------------+--------+-------------+-----------+
| **[Federal                        | **[F   | **[State    | **[       |
| Requirement]{.smallcaps}**        | ederal | Citation    | Different |
|                                   | Citat  | (Document   | from fed. |
|                                   | ion]{. | title, Page | req       |
|                                   | smallc | number,     | uirement? |
|                                   | aps}** | Section/par | Explain   |
|                                   |        | agraph)]{.s | on        |
|                                   |        | mallcaps}** | separate  |
|                                   |        |             | sh        |
|                                   |        |             | eet]{.sma |
|                                   |        |             | llcaps}** |
+-----------------------------------+--------+-------------+-----------+
| **[142---National Primary         |        |             |           |
| Drinking Water Regulations        |        |             |           |
| Implementation]{.smallcaps}**     |        |             |           |
+-----------------------------------+--------+-------------+-----------+
| # Subpart B---P                   |        |             |           |
| rimary Enforcement Responsibility |        |             |           |
+-----------------------------------+--------+-------------+-----------+
| **§ 142.16 [Special Primacy       |        |             |           |
| Requirements]{.smallcaps}**       |        |             |           |
+-----------------------------------+--------+-------------+-----------+
| An application for approval of a  | §142   |             |           |
| State program revision which      | .16(e) |             |           |
| adopts the requirements specified |        |             |           |
| in §§141.11, 141.23, 141.24,      |        |             |           |
| 141.32, 141.40, 141.61 and 141.62 |        |             |           |
| for a newly regulated contaminant |        |             |           |
| must contain the following (in    |        |             |           |
| addition to the general primacy   |        |             |           |
| requirements enumerated elsewhere |        |             |           |
| in this part, including the       |        |             |           |
| requirement that State            |        |             |           |
| regulations be at least as        |        |             |           |
| stringent as the federal          |        |             |           |
| requirements):                    |        |             |           |
+-----------------------------------+--------+-------------+-----------+
| \[reserved\]                      | §142   |             |           |
|                                   | .16(i) |             |           |
+-----------------------------------+--------+-------------+-----------+
| An application for approval of a  | §142   |             |           |
| State program revision which      | .16(j) |             |           |
| adopts the requirements specified |        |             |           |
| in §§141.11, 141.23, 141.24,      |        |             |           |
| 141.32, 141.40, 141.61 and 141.62 |        |             |           |
| for an existing regulated         |        |             |           |
| contaminant must contain the      |        |             |           |
| following (in addition to the     |        |             |           |
| general primacy requirements      |        |             |           |
| enumerated elsewhere in this      |        |             |           |
| part, including the requirement   |        |             |           |
| that State regulations be at      |        |             |           |
| least as stringent as the federal |        |             |           |
| requirements):                    |        |             |           |
+-----------------------------------+--------+-------------+-----------+
| If a State chooses to issue       | §      |             |           |
| waivers from the monitoring       | 142.16 |             |           |
| requirements in §§141.23, 141.24, | (j)(1) |             |           |
| and 141.40, the State shall       |        |             |           |
| describe the procedures and       |        |             |           |
| criteria which it will use to     |        |             |           |
| review waiver applications and    |        |             |           |
| issue waiver determinations. The  |        |             |           |
| State shall provide the same      |        |             |           |
| information required in           |        |             |           |
| §142.16(e)(1)(i) and (ii). States |        |             |           |
| may update their existing waiver  |        |             |           |
| criteria or use the requirements  |        |             |           |
| submitted under the National      |        |             |           |
| Primary Drinking Water            |        |             |           |
| Regulations for the inorganic and |        |             |           |
| organic contaminants (i.e. Phase  |        |             |           |
| II/V rule) in 16(e) of this       |        |             |           |
| section. States may simply note   |        |             |           |
| in their application any          |        |             |           |
| revisions to existing waiver      |        |             |           |
| criteria or note that the same    |        |             |           |
| procedures to issue waivers will  |        |             |           |
| be used.                          |        |             |           |
+-----------------------------------+--------+-------------+-----------+
| A monitoring plan by which the    | §      |             |           |
| State will ensure all systems     | 142.16 |             |           |
| complete the required monitoring  | (j)(2) |             |           |
| by the regulatory deadlines.      |        |             |           |
| States may update their existing  |        |             |           |
| monitoring plan or use the same   |        |             |           |
| monitoring plan submitted under   |        |             |           |
| the National Primary Drinking     |        |             |           |
| Water Regulations for the         |        |             |           |
| inorganic and organic             |        |             |           |
| contaminants (i.e. Phase II/V     |        |             |           |
| rule) in 16(e) of this section.   |        |             |           |
| States may simply note in their   |        |             |           |
| application any revisions to an   |        |             |           |
| existing monitoring plan or note  |        |             |           |
| that the same monitoring plan     |        |             |           |
| will be used. The State must      |        |             |           |
| demonstrate that the monitoring   |        |             |           |
| plan is enforceable under State   |        |             |           |
| law.                              |        |             |           |
+-----------------------------------+--------+-------------+-----------+
| **[Federal                        | **[F   | **[State    | **[       |
| Requirement]{.smallcaps}**        | ederal | Citation    | Different |
|                                   | Citat  | (Document   | from fed. |
|                                   | ion]{. | title, Page | req       |
|                                   | smallc | number,     | uirement? |
|                                   | aps}** | Section/par | Explain   |
|                                   |        | agraph)]{.s | on        |
|                                   |        | mallcaps}** | separate  |
|                                   |        |             | sh        |
|                                   |        |             | eet]{.sma |
|                                   |        |             | llcaps}** |
+-----------------------------------+--------+-------------+-----------+
| States establish the initial      | §142   |             |           |
| monitoring requirements for new   | .16(k) |             |           |
| systems and new sources. States   |        |             |           |
| must explain their initial        |        |             |           |
| monitoring schedules and how      |        |             |           |
| these monitoring schedules ensure |        |             |           |
| that public water systems and     |        |             |           |
| sources comply with MCLs and      |        |             |           |
| monitoring requirements. States   |        |             |           |
| must also specify the time frame  |        |             |           |
| in which new systems will         |        |             |           |
| demonstrate compliance with the   |        |             |           |
| MCLs.                             |        |             |           |
+-----------------------------------+--------+-------------+-----------+
| **§142.62 [Variances and          |        |             |           |
| exemptions]{.smallcaps}**         |        |             |           |
+-----------------------------------+--------+-------------+-----------+
| **BAT for Inorganic Compounds     | Table  |             |           |
| Listed in §141.62(B)**            | to     |             |           |
|                                   |        |             |           |
| Chemical name BAT(s)              | §142   |             |           |
|                                   | .62(b) |             |           |
| Arsenic^4^ ^5^1, 2, 5, 6, 7, 9,   |        |             |           |
| 12                                |        |             |           |
+-----------------------------------+--------+-------------+-----------+
| 4\. BATs for Arsenic V.           | Foo    |             |           |
| Pre-oxidation may be required to  | tnotes |             |           |
| convert Arsenic III to Arsenic V. | to     |             |           |
|                                   | Table  |             |           |
| 5\. To obtain high removals, iron | to     |             |           |
| to arsenic ratio must be at least |        |             |           |
| 20:1.                             | §142   |             |           |
|                                   | .62(b) |             |           |
+-----------------------------------+--------+-------------+-----------+
| *Key to BATs in Table*            | Key to |             |           |
|                                   | BATs   |             |           |
| 1 = Activated Alumina             | in     |             |           |
|                                   |        |             |           |
| 2 = Coagulation/Filtration (not   | Table  |             |           |
| BAT for systems \<500 service     | to     |             |           |
| connections)                      |        |             |           |
|                                   | §142   |             |           |
| 5 = Ion Exchange                  | .62(b) |             |           |
|                                   |        |             |           |
| 6 = Lime Softening (not BAT for   |        |             |           |
| systems \<500 service             |        |             |           |
| connections)                      |        |             |           |
|                                   |        |             |           |
| 7 = Reverse Osmosis               |        |             |           |
|                                   |        |             |           |
| 9 = Electrodialysis               |        |             |           |
|                                   |        |             |           |
| 12 = Oxidation/Filtration         |        |             |           |
+-----------------------------------+--------+-------------+-----------+