> **Appendix D**
>
> **Primacy Revision Crosswalks**

**Primacy Revision Crosswalk for the Radionuclides Rule**

+---------+---------+---------+---------+------------------+--------+
| **[     |         |         | **[F    | **[State         | **[Dif |
| Federal |         |         | ederal] | Citation         | ferent |
| Requi   |         |         | {.small | (Document title, | from   |
| rement] |         |         | caps}** | Page number,     | fed.   |
| {.small |         |         |         | S                | requir |
| caps}** |         |         | **[Ci   | ection/paragraph | ement? |
|         |         |         | tation] | )]{.smallcaps}** | E      |
|         |         |         | {.small |                  | xplain |
|         |         |         | caps}** |                  | on     |
|         |         |         |         |                  | se     |
|         |         |         |         |                  | parate |
|         |         |         |         |                  | sh     |
|         |         |         |         |                  | eet]{. |
|         |         |         |         |                  | smallc |
|         |         |         |         |                  | aps}** |
+=========+=========+=========+=========+==================+========+
| **[     |         |         |         |                  |        |
| Subpart |         |         |         |                  |        |
| B -     |         |         |         |                  |        |
| Maximum |         |         |         |                  |        |
| Cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| Levels] |         |         |         |                  |        |
| {.small |         |         |         |                  |        |
| caps}** |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **\'    |         |         |         |                  |        |
| [141.25 |         |         |         |                  |        |
| Ana     |         |         |         |                  |        |
| lytical |         |         |         |                  |        |
| methods |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| radioac |         |         |         |                  |        |
| tivity] |         |         |         |                  |        |
| {.small |         |         |         |                  |        |
| caps}** |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| A       |         |         | \       |                  |        |
| nalysis |         |         | '141.25 |                  |        |
| for the |         |         | (a)     |                  |        |
| fo      |         |         |         |                  |        |
| llowing |         |         |         |                  |        |
| conta   |         |         |         |                  |        |
| minants |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| be      |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| nducted |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| termine |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with \' |         |         |         |                  |        |
| 141.66  |         |         |         |                  |        |
| (       |         |         |         |                  |        |
| radioac |         |         |         |                  |        |
| tivity) |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| acc     |         |         |         |                  |        |
| ordance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| methods |         |         |         |                  |        |
| in the  |         |         |         |                  |        |
| fo      |         |         |         |                  |        |
| llowing |         |         |         |                  |        |
| table,  |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| their   |         |         |         |                  |        |
| equ     |         |         |         |                  |        |
| ivalent |         |         |         |                  |        |
| det     |         |         |         |                  |        |
| ermined |         |         |         |                  |        |
| by EPA  |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| acc     |         |         |         |                  |        |
| ordance |         |         |         |                  |        |
| with \' |         |         |         |                  |        |
| 141.27. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| To      |         |         | \       |                  |        |
| de      |         |         | '141.25 |                  |        |
| termine |         |         | (c)(1)  |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| \'141.6 |         |         |         |                  |        |
| 6(b)(c) |         |         |         |                  |        |
| and (e) |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| tection |         |         |         |                  |        |
| limit   |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| not     |         |         |         |                  |        |
| exceed  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| concent |         |         |         |                  |        |
| rations |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| Table   |         |         |         |                  |        |
| B.      |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| De      |         |         | \       |                  |        |
| tection |         |         | '141.25 |                  |        |
| Limits  |         |         | (c)(1)  |                  |        |
| for     |         |         | Table B |                  |        |
| Gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| ac      |         |         |         |                  |        |
| tivity, |         |         |         |                  |        |
| Radium  |         |         |         |                  |        |
| 226,    |         |         |         |                  |        |
| Radium  |         |         |         |                  |        |
| 228,    |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Uranium |         |         |         |                  |        |
|         |         |         |         |                  |        |
| [Con    |         |         |         |                  |        |
| taminan |         |         |         |                  |        |
| t]{.und |         |         |         |                  |        |
| erline} |         |         |         |                  |        |
| [De     |         |         |         |                  |        |
| tection |         |         |         |                  |        |
| Limi    |         |         |         |                  |        |
| t]{.und |         |         |         |                  |        |
| erline} |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| act     |         |         |         |                  |        |
| ivity\. |         |         |         |                  |        |
| ..\...\ |         |         |         |                  |        |
| ...\... |         |         |         |                  |        |
| \...\.. |         |         |         |                  |        |
| .\...\. |         |         |         |                  |        |
| ..\...\ |         |         |         |                  |        |
| ...\... |         |         |         |                  |        |
| \...\.. |         |         |         |                  |        |
| .\...\. |         |         |         |                  |        |
| ..\...3 |         |         |         |                  |        |
| pCi/L   |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Radium  |         |         |         |                  |        |
| 226     |         |         |         |                  |        |
| \...\.  |         |         |         |                  |        |
| ..\...\ |         |         |         |                  |        |
| ...\... |         |         |         |                  |        |
| \...\.. |         |         |         |                  |        |
| .\...\. |         |         |         |                  |        |
| ..\...\ |         |         |         |                  |        |
| ...\... |         |         |         |                  |        |
| \...\.. |         |         |         |                  |        |
| .\...\. |         |         |         |                  |        |
| ..\...\ |         |         |         |                  |        |
| ...\... |         |         |         |                  |        |
| \...\.. |         |         |         |                  |        |
| .\...\. |         |         |         |                  |        |
| ..\...1 |         |         |         |                  |        |
| pCi/L   |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Radium  |         |         |         |                  |        |
| 228     |         |         |         |                  |        |
| \...\.. |         |         |         |                  |        |
| .\...\. |         |         |         |                  |        |
| ..\...\ |         |         |         |                  |        |
| ...\... |         |         |         |                  |        |
| \...\.. |         |         |         |                  |        |
| .\...\. |         |         |         |                  |        |
| ..\...\ |         |         |         |                  |        |
| ...\... |         |         |         |                  |        |
| \...\.. |         |         |         |                  |        |
| .\...\. |         |         |         |                  |        |
| ..\...\ |         |         |         |                  |        |
| ...\... |         |         |         |                  |        |
| \...\.. |         |         |         |                  |        |
| .\....1 |         |         |         |                  |        |
| pCi/L   |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Uranium |         |         |         |                  |        |
| \...\.. |         |         |         |                  |        |
| .\...\. |         |         |         |                  |        |
| ..\...\ |         |         |         |                  |        |
| ...\... |         |         |         |                  |        |
| \...\.. |         |         |         |                  |        |
| .\...\. |         |         |         |                  |        |
| ..\...\ |         |         |         |                  |        |
| ...\... |         |         |         |                  |        |
| \...\.. |         |         |         |                  |        |
| .\...\. |         |         |         |                  |        |
| ..\...\ |         |         |         |                  |        |
| ...\... |         |         |         |                  |        |
| \...\.. |         |         |         |                  |        |
| .\...\. |         |         |         |                  |        |
| ..\.... |         |         |         |                  |        |
| Reserve |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| To      |         |         | \       |                  |        |
| de      |         |         | '141.25 |                  |        |
| termine |         |         | (c)(2)  |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| \       |         |         |         |                  |        |
| '141.66 |         |         |         |                  |        |
| (d) the |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| tection |         |         |         |                  |        |
| limits  |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| not     |         |         |         |                  |        |
| exceed  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| concent |         |         |         |                  |        |
| rations |         |         |         |                  |        |
| listed  |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| Table   |         |         |         |                  |        |
| C.      |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Table   |         |         | \       |                  |        |
| CBDe    |         |         | '141.25 |                  |        |
| tection |         |         | (c)(2)  |                  |        |
| Limits  |         |         |         |                  |        |
| for     |         |         | Table C |                  |        |
| M       |         |         |         |                  |        |
| an-Made |         |         |         |                  |        |
| Beta    |         |         |         |                  |        |
| P       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Photon  |         |         |         |                  |        |
| E       |         |         |         |                  |        |
| mitters |         |         |         |                  |        |
| \[Note: |         |         |         |                  |        |
| name    |         |         |         |                  |        |
| re      |         |         |         |                  |        |
| vised\] |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| To      |         |         | \       |                  |        |
| judge   |         |         | '141.25 |                  |        |
| com     |         |         | (d)     |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| levels  |         |         |         |                  |        |
| listed  |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| \'      |         |         |         |                  |        |
| 141.66, |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| verages |         |         |         |                  |        |
| of data |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| be used |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| be      |         |         |         |                  |        |
| rounded |         |         |         |                  |        |
| to the  |         |         |         |                  |        |
| same    |         |         |         |                  |        |
| number  |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| sign    |         |         |         |                  |        |
| ificant |         |         |         |                  |        |
| figures |         |         |         |                  |        |
| as the  |         |         |         |                  |        |
| maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| level   |         |         |         |                  |        |
| for the |         |         |         |                  |        |
| su      |         |         |         |                  |        |
| bstance |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| qu      |         |         |         |                  |        |
| estion. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **[     |         |         |         |                  |        |
| Subpart |         |         |         |                  |        |
| C -     |         |         |         |                  |        |
| Mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Ana     |         |         |         |                  |        |
| lytical |         |         |         |                  |        |
| Requir  |         |         |         |                  |        |
| ements] |         |         |         |                  |        |
| {.small |         |         |         |                  |        |
| caps}** |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **\'    |         |         |         |                  |        |
| [141.26 |         |         |         |                  |        |
| Mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| Fr      |         |         |         |                  |        |
| equency |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| Requi   |         |         |         |                  |        |
| rements |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| Radion  |         |         |         |                  |        |
| uclides |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| Co      |         |         |         |                  |        |
| mmunity |         |         |         |                  |        |
| Water   |         |         |         |                  |        |
| S       |         |         |         |                  |        |
| ystems] |         |         |         |                  |        |
| {.small |         |         |         |                  |        |
| caps}** |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Mon     |         |         | \       |                  |        |
| itoring |         |         | '141.26 |                  |        |
| and     |         |         | (a)     |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| requi   |         |         |         |                  |        |
| rements |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| ac      |         |         |         |                  |        |
| tivity, |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| um-226, |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| um-228, |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| u       |         |         |         |                  |        |
| ranium. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Co      |         |         | \       |                  |        |
| mmunity |         |         | '141.26 |                  |        |
| water   |         |         | (a)(1)  |                  |        |
| systems |         |         |         |                  |        |
| (CWSs)  |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| conduct |         |         |         |                  |        |
| initial |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| termine |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with \' |         |         |         |                  |        |
| 141.66  |         |         |         |                  |        |
| (b),    |         |         |         |                  |        |
| (c) and |         |         |         |                  |        |
| (e) by  |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| ecember |         |         |         |                  |        |
| 31,     |         |         |         |                  |        |
| 2007.   |         |         |         |                  |        |
| For the |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| urposes |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| ac      |         |         |         |                  |        |
| tivity, |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| um-226, |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| um-228, |         |         |         |                  |        |
| u       |         |         |         |                  |        |
| ranium, |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| photon  |         |         |         |                  |        |
| radioa  |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| rinking |         |         |         |                  |        |
| water,  |         |         |         |                  |        |
| Ade     |         |         |         |                  |        |
| tection |         |         |         |                  |        |
| limit@  |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| defined |         |         |         |                  |        |
| as in   |         |         |         |                  |        |
| \'141   |         |         |         |                  |        |
| .25(c). |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Applic  |         |         | \       |                  |        |
| ability |         |         | '141.26 |                  |        |
| and     |         |         | (a      |                  |        |
| s       |         |         | )(1)(i) |                  |        |
| ampling |         |         |         |                  |        |
| l       |         |         |         |                  |        |
| ocation |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| e       |         |         |         |                  |        |
| xisting |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mmunity |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| systems |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ources. |         |         |         |                  |        |
| All     |         |         |         |                  |        |
| e       |         |         |         |                  |        |
| xisting |         |         |         |                  |        |
| CWSs    |         |         |         |                  |        |
| using   |         |         |         |                  |        |
| ground  |         |         |         |                  |        |
| water,  |         |         |         |                  |        |
| surface |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| systems |         |         |         |                  |        |
| using   |         |         |         |                  |        |
| both    |         |         |         |                  |        |
| ground  |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| surface |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| (Asy    |         |         |         |                  |        |
| stems@) |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| at      |         |         |         |                  |        |
| every   |         |         |         |                  |        |
| entry   |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| to the  |         |         |         |                  |        |
| distr   |         |         |         |                  |        |
| ibution |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| that is |         |         |         |                  |        |
| represe |         |         |         |                  |        |
| ntative |         |         |         |                  |        |
| of all  |         |         |         |                  |        |
| sources |         |         |         |                  |        |
| being   |         |         |         |                  |        |
| used    |         |         |         |                  |        |
| (As     |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point@) |         |         |         |                  |        |
| under   |         |         |         |                  |        |
| normal  |         |         |         |                  |        |
| op      |         |         |         |                  |        |
| erating |         |         |         |                  |        |
| cond    |         |         |         |                  |        |
| itions. |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| take    |         |         |         |                  |        |
| each    |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| at the  |         |         |         |                  |        |
| same    |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| unless  |         |         |         |                  |        |
| con     |         |         |         |                  |        |
| ditions |         |         |         |                  |        |
| make    |         |         |         |                  |        |
| another |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| more    |         |         |         |                  |        |
| represe |         |         |         |                  |        |
| ntative |         |         |         |                  |        |
| of each |         |         |         |                  |        |
| source  |         |         |         |                  |        |
| or the  |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| has     |         |         |         |                  |        |
| des     |         |         |         |                  |        |
| ignated |         |         |         |                  |        |
| a       |         |         |         |                  |        |
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| system  |         |         |         |                  |        |
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| cation, |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| acc     |         |         |         |                  |        |
| ordance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| \       |         |         |         |                  |        |
| '141.26 |         |         |         |                  |        |
| (a)(2)( |         |         |         |                  |        |
| ii)(C). |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Applic  |         |         | \       |                  |        |
| ability |         |         | '141.26 |                  |        |
| and     |         |         | (a)     |                  |        |
| s       |         |         | (1)(ii) |                  |        |
| ampling |         |         |         |                  |        |
| l       |         |         |         |                  |        |
| ocation |         |         |         |                  |        |
| for new |         |         |         |                  |        |
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| All new |         |         |         |                  |        |
| CWSs or |         |         |         |                  |        |
| CWSs    |         |         |         |                  |        |
| that    |         |         |         |                  |        |
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| conduct |         |         |         |                  |        |
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| mon     |         |         |         |                  |        |
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| source  |         |         |         |                  |        |
| within  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| first   |         |         |         |                  |        |
| quarter |         |         |         |                  |        |
| after   |         |         |         |                  |        |
| ini     |         |         |         |                  |        |
| tiating |         |         |         |                  |        |
| use of  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| source. |         |         |         |                  |        |
| CWSs    |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| conduct |         |         |         |                  |        |
| more    |         |         |         |                  |        |
| f       |         |         |         |                  |        |
| requent |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| when    |         |         |         |                  |        |
| ordered |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| in the  |         |         |         |                  |        |
| event   |         |         |         |                  |        |
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| p       |         |         |         |                  |        |
| ossible |         |         |         |                  |        |
| contam  |         |         |         |                  |        |
| ination |         |         |         |                  |        |
| or when |         |         |         |                  |        |
| changes |         |         |         |                  |        |
| in the  |         |         |         |                  |        |
| distr   |         |         |         |                  |        |
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| tr      |         |         |         |                  |        |
| eatment |         |         |         |                  |        |
| pr      |         |         |         |                  |        |
| ocesses |         |         |         |                  |        |
| occur   |         |         |         |                  |        |
| which   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| i       |         |         |         |                  |        |
| ncrease |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| concen  |         |         |         |                  |        |
| tration |         |         |         |                  |        |
| of      |         |         |         |                  |        |
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| ctivity |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| f       |         |         |         |                  |        |
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| water.  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Initial |         |         | \       |                  |        |
| moni    |         |         | '141.26 |                  |        |
| toring: |         |         | (a)(2)  |                  |        |
| Systems |         |         |         |                  |        |
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| initial |         |         |         |                  |        |
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| gross   |         |         |         |                  |        |
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| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| ac      |         |         |         |                  |        |
| tivity, |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| um-226, |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| um-228, |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| uranium |         |         |         |                  |        |
| as      |         |         |         |                  |        |
| f       |         |         |         |                  |        |
| ollows: |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Systems |         |         | \       |                  |        |
| without |         |         | '141.26 |                  |        |
| acc     |         |         | (a      |                  |        |
| eptable |         |         | )(2)(i) |                  |        |
| his     |         |         |         |                  |        |
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| data    |         |         |         |                  |        |
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| samples |         |         |         |                  |        |
| at all  |         |         |         |                  |        |
| s       |         |         |         |                  |        |
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| points  |         |         |         |                  |        |
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| D       |         |         |         |                  |        |
| ecember |         |         |         |                  |        |
| 31,     |         |         |         |                  |        |
| 2007.   |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Grandfa |         |         | \       |                  |        |
| thering |         |         | '141.26 |                  |        |
| of      |         |         | (a)     |                  |        |
| data:   |         |         | (2)(ii) |                  |        |
| States  |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| allow   |         |         |         |                  |        |
| his     |         |         |         |                  |        |
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| data    |         |         |         |                  |        |
| co      |         |         |         |                  |        |
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| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
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| ements, |         |         |         |                  |        |
| for     |         |         |         |                  |        |
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| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point,  |         |         |         |                  |        |
| for the |         |         |         |                  |        |
| fo      |         |         |         |                  |        |
| llowing |         |         |         |                  |        |
| situ    |         |         |         |                  |        |
| ations: |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| To      |         |         | \       |                  |        |
| satisfy |         |         | '141.26 |                  |        |
| initial |         |         | (a)(2)  |                  |        |
| mon     |         |         | (ii)(A) |                  |        |
| itoring |         |         |         |                  |        |
| requir  |         |         |         |                  |        |
| ements, |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| co      |         |         |         |                  |        |
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| data    |         |         |         |                  |        |
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| period  |         |         |         |                  |        |
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| began   |         |         |         |                  |        |
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| June    |         |         |         |                  |        |
| 2000    |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| ecember |         |         |         |                  |        |
| 8,      |         |         |         |                  |        |
| 2003.   |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| To      |         |         | \       |                  |        |
| satisfy |         |         | '141.26 |                  |        |
| initial |         |         | (a)(2)  |                  |        |
| mon     |         |         | (ii)(B) |                  |        |
| itoring |         |         |         |                  |        |
| requir  |         |         |         |                  |        |
| ements, |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| co      |         |         |         |                  |        |
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| entry   |         |         |         |                  |        |
| points  |         |         |         |                  |        |
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| opriate |         |         |         |                  |        |
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| data    |         |         |         |                  |        |
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| each    |         |         |         |                  |        |
| entry   |         |         |         |                  |        |
| point   |         |         |         |                  |        |
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| distr   |         |         |         |                  |        |
| ibution |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| may use |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| data    |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| last    |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| period  |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| began   |         |         |         |                  |        |
| between |         |         |         |                  |        |
| June    |         |         |         |                  |        |
| 2000    |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| ecember |         |         |         |                  |        |
| 8,      |         |         |         |                  |        |
| 2003.   |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| To      |         |         | \       |                  |        |
| satisfy |         |         | '141.26 |                  |        |
| initial |         |         | (a)(2)  |                  |        |
| mon     |         |         | (ii)(C) |                  |        |
| itoring |         |         |         |                  |        |
| requir  |         |         |         |                  |        |
| ements, |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mmunity |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| system  |         |         |         |                  |        |
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| began   |         |         |         |                  |        |
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| June    |         |         |         |                  |        |
| 2000    |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| ecember |         |         |         |                  |        |
| 8,      |         |         |         |                  |        |
| 2003,   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| rovided |         |         |         |                  |        |
| that    |         |         |         |                  |        |
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| State   |         |         |         |                  |        |
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| data    |         |         |         |                  |        |
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| demo    |         |         |         |                  |        |
| nstrate |         |         |         |                  |        |
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| each    |         |         |         |                  |        |
| entry   |         |         |         |                  |        |
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| to be   |         |         |         |                  |        |
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| based   |         |         |         |                  |        |
| upon    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
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| torical |         |         |         |                  |        |
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| rea     |         |         |         |                  |        |
| sonable |         |         |         |                  |        |
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| the     |         |         |         |                  |        |
| vari    |         |         |         |                  |        |
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| aminant |         |         |         |                  |        |
| levels  |         |         |         |                  |        |
| between |         |         |         |                  |        |
| entry   |         |         |         |                  |        |
| points. |         |         |         |                  |        |
| The     |         |         |         |                  |        |
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| must    |         |         |         |                  |        |
| make a  |         |         |         |                  |        |
| written |         |         |         |                  |        |
| finding |         |         |         |                  |        |
| ind     |         |         |         |                  |        |
| icating |         |         |         |                  |        |
| how the |         |         |         |                  |        |
| data    |         |         |         |                  |        |
| c       |         |         |         |                  |        |
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| to the  |         |         |         |                  |        |
| these   |         |         |         |                  |        |
| requir  |         |         |         |                  |        |
| ements. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| For     |         |         | \       |                  |        |
| gross   |         |         | '141.26 |                  |        |
| alpha   |         |         | (a)(    |                  |        |
| p       |         |         | 2)(iii) |                  |        |
| article |         |         |         |                  |        |
| ac      |         |         |         |                  |        |
| tivity, |         |         |         |                  |        |
| u       |         |         |         |                  |        |
| ranium, |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-228 |         |         |         |                  |        |
| moni    |         |         |         |                  |        |
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| the     |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
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| results |         |         |         |                  |        |
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| samples |         |         |         |                  |        |
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| uarters |         |         |         |                  |        |
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| de      |         |         |         |                  |        |
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| limit.  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| If the  |         |         | \       |                  |        |
| average |         |         | '141.26 |                  |        |
| of the  |         |         | (a)     |                  |        |
| initial |         |         | (2)(iv) |                  |        |
| mon     |         |         |         |                  |        |
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| results |         |         |         |                  |        |
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| the     |         |         |         |                  |        |
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| analyze |         |         |         |                  |        |
| qu      |         |         |         |                  |        |
| arterly |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| at that |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| until   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| has     |         |         |         |                  |        |
| results |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| four    |         |         |         |                  |        |
| cons    |         |         |         |                  |        |
| ecutive |         |         |         |                  |        |
| q       |         |         |         |                  |        |
| uarters |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| are at  |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| below   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| MCL,    |         |         |         |                  |        |
| unless  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| enters  |         |         |         |                  |        |
| into    |         |         |         |                  |        |
| another |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| chedule |         |         |         |                  |        |
| as part |         |         |         |                  |        |
| of a    |         |         |         |                  |        |
| formal  |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| ag      |         |         |         |                  |        |
| reement |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| State.  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Reduced |         |         | \       |                  |        |
| moni    |         |         | '141.26 |                  |        |
| toring: |         |         | (a)(3)  |                  |        |
| States  |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| allow   |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mmunity |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| systems |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| reduce  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| future  |         |         |         |                  |        |
| fr      |         |         |         |                  |        |
| equency |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| once    |         |         |         |                  |        |
| every   |         |         |         |                  |        |
| three   |         |         |         |                  |        |
| years   |         |         |         |                  |        |
| to once |         |         |         |                  |        |
| every   |         |         |         |                  |        |
| six or  |         |         |         |                  |        |
| nine    |         |         |         |                  |        |
| years   |         |         |         |                  |        |
| at each |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point,  |         |         |         |                  |        |
| based   |         |         |         |                  |        |
| on the  |         |         |         |                  |        |
| fo      |         |         |         |                  |        |
| llowing |         |         |         |                  |        |
| cr      |         |         |         |                  |        |
| iteria: |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| If the  |         |         | \       |                  |        |
| average |         |         | '141.26 |                  |        |
| of the  |         |         | (a      |                  |        |
| initial |         |         | )(3)(i) |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| results |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| each    |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| below   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| tection |         |         |         |                  |        |
| limit   |         |         |         |                  |        |
| sp      |         |         |         |                  |        |
| ecified |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| \       |         |         |         |                  |        |
| '141.25 |         |         |         |                  |        |
| (c)(1)  |         |         |         |                  |        |
| (Table  |         |         |         |                  |        |
| B), the |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| collect |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| analyze |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| using   |         |         |         |                  |        |
| at      |         |         |         |                  |        |
| least   |         |         |         |                  |        |
| one     |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| at that |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| every   |         |         |         |                  |        |
| nine    |         |         |         |                  |        |
| years.  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| For     |         |         | \       |                  |        |
| gross   |         |         | '141.26 |                  |        |
| alpha   |         |         | (a)     |                  |        |
| p       |         |         | (3)(ii) |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| u       |         |         |         |                  |        |
| ranium, |         |         |         |                  |        |
| if the  |         |         |         |                  |        |
| average |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| initial |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| results |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| each    |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| is at   |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| above   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| tection |         |         |         |                  |        |
| limit   |         |         |         |                  |        |
| but at  |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| below 2 |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| MCL,    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| collect |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| analyze |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| using   |         |         |         |                  |        |
| at      |         |         |         |                  |        |
| least   |         |         |         |                  |        |
| one     |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| at that |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| every   |         |         |         |                  |        |
| six     |         |         |         |                  |        |
| years.  |         |         |         |                  |        |
| For     |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| um-228, |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| ana     |         |         |         |                  |        |
| lytical |         |         |         |                  |        |
| results |         |         |         |                  |        |
| must be |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mbined. |         |         |         |                  |        |
| If the  |         |         |         |                  |        |
| average |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| initial |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| results |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-228 |         |         |         |                  |        |
| is at   |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| above   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| tection |         |         |         |                  |        |
| limit   |         |         |         |                  |        |
| but at  |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| below 2 |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| MCL,    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| collect |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| analyze |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| using   |         |         |         |                  |        |
| at      |         |         |         |                  |        |
| least   |         |         |         |                  |        |
| one     |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| at that |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| every   |         |         |         |                  |        |
| six     |         |         |         |                  |        |
| years.  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| For     |         |         | \       |                  |        |
| gross   |         |         | '141.26 |                  |        |
| alpha   |         |         | (a)(    |                  |        |
| p       |         |         | 3)(iii) |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| u       |         |         |         |                  |        |
| ranium, |         |         |         |                  |        |
| if the  |         |         |         |                  |        |
| average |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| initial |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| results |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| each    |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| above 2 |         |         |         |                  |        |
| the MCL |         |         |         |                  |        |
| but at  |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| below   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| MCL,    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| collect |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| analyze |         |         |         |                  |        |
| at      |         |         |         |                  |        |
| least   |         |         |         |                  |        |
| one     |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| at that |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| every   |         |         |         |                  |        |
| three   |         |         |         |                  |        |
| years.  |         |         |         |                  |        |
| For     |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| um-228, |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| ana     |         |         |         |                  |        |
| lytical |         |         |         |                  |        |
| results |         |         |         |                  |        |
| must be |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mbined. |         |         |         |                  |        |
| If the  |         |         |         |                  |        |
| average |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| initial |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| results |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-228 |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| above 2 |         |         |         |                  |        |
| the MCL |         |         |         |                  |        |
| but at  |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| below   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| MCL,    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| collect |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| analyze |         |         |         |                  |        |
| at      |         |         |         |                  |        |
| least   |         |         |         |                  |        |
| one     |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| at that |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| every   |         |         |         |                  |        |
| three   |         |         |         |                  |        |
| years.  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Systems |         |         | \       |                  |        |
| must    |         |         | '141.26 |                  |        |
| use the |         |         | (a)     |                  |        |
| samples |         |         | (3)(iv) |                  |        |
| co      |         |         |         |                  |        |
| llected |         |         |         |                  |        |
| during  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| reduced |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| period  |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| termine |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| fr      |         |         |         |                  |        |
| equency |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| sub     |         |         |         |                  |        |
| sequent |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| periods |         |         |         |                  |        |
| (e.g.,  |         |         |         |                  |        |
| if a    |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ystem=s |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| is on a |         |         |         |                  |        |
| nine    |         |         |         |                  |        |
| year    |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| period, |         |         |         |                  |        |
| and the |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| result  |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| above 2 |         |         |         |                  |        |
| MCL,    |         |         |         |                  |        |
| then    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| next    |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| period  |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| three   |         |         |         |                  |        |
| years). |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| If a    |         |         | \       |                  |        |
| system  |         |         | '141.26 |                  |        |
| has a   |         |         | (a      |                  |        |
| mon     |         |         | )(3)(v) |                  |        |
| itoring |         |         |         |                  |        |
| result  |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| exceeds |         |         |         |                  |        |
| the MCL |         |         |         |                  |        |
| while   |         |         |         |                  |        |
| on      |         |         |         |                  |        |
| reduced |         |         |         |                  |        |
| moni    |         |         |         |                  |        |
| toring, |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| collect |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| analyze |         |         |         |                  |        |
| qu      |         |         |         |                  |        |
| arterly |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| at that |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| until   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| has     |         |         |         |                  |        |
| results |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| four    |         |         |         |                  |        |
| cons    |         |         |         |                  |        |
| ecutive |         |         |         |                  |        |
| q       |         |         |         |                  |        |
| uarters |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| are     |         |         |         |                  |        |
| below   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| MCL,    |         |         |         |                  |        |
| unless  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| enters  |         |         |         |                  |        |
| into    |         |         |         |                  |        |
| another |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| chedule |         |         |         |                  |        |
| as part |         |         |         |                  |        |
| of a    |         |         |         |                  |        |
| formal  |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| ag      |         |         |         |                  |        |
| reement |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| State.  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Compo   |         |         | \       |                  |        |
| siting: |         |         | '141.26 |                  |        |
| To      |         |         | (a)(4)  |                  |        |
| fulfill |         |         |         |                  |        |
| qu      |         |         |         |                  |        |
| arterly |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| requi   |         |         |         |                  |        |
| rements |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| ac      |         |         |         |                  |        |
| tivity, |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| um-226, |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| um-228, |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| u       |         |         |         |                  |        |
| ranium, |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mposite |         |         |         |                  |        |
| up to   |         |         |         |                  |        |
| four    |         |         |         |                  |        |
| cons    |         |         |         |                  |        |
| ecutive |         |         |         |                  |        |
| qu      |         |         |         |                  |        |
| arterly |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| from a  |         |         |         |                  |        |
| single  |         |         |         |                  |        |
| entry   |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| if      |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| nalysis |         |         |         |                  |        |
| is done |         |         |         |                  |        |
| within  |         |         |         |                  |        |
| a year  |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| first   |         |         |         |                  |        |
| sample. |         |         |         |                  |        |
| States  |         |         |         |                  |        |
| will    |         |         |         |                  |        |
| treat   |         |         |         |                  |        |
| ana     |         |         |         |                  |        |
| lytical |         |         |         |                  |        |
| results |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| posited |         |         |         |                  |        |
| as the  |         |         |         |                  |        |
| average |         |         |         |                  |        |
| ana     |         |         |         |                  |        |
| lytical |         |         |         |                  |        |
| result  |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| termine |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| MCLs    |         |         |         |                  |        |
| and the |         |         |         |                  |        |
| future  |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| fre     |         |         |         |                  |        |
| quency. |         |         |         |                  |        |
| If the  |         |         |         |                  |        |
| ana     |         |         |         |                  |        |
| lytical |         |         |         |                  |        |
| result  |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| posited |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| greater |         |         |         |                  |        |
| than 2  |         |         |         |                  |        |
| MCL,    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| direct  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| to take |         |         |         |                  |        |
| add     |         |         |         |                  |        |
| itional |         |         |         |                  |        |
| qu      |         |         |         |                  |        |
| arterly |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| before  |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| llowing |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| under a |         |         |         |                  |        |
| reduced |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| sc      |         |         |         |                  |        |
| hedule. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| A gross |         |         | \       |                  |        |
| alpha   |         |         | '141.26 |                  |        |
| p       |         |         | (a)(5)  |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| meas    |         |         |         |                  |        |
| urement |         |         |         |                  |        |
| may be  |         |         |         |                  |        |
| subs    |         |         |         |                  |        |
| tituted |         |         |         |                  |        |
| for the |         |         |         |                  |        |
| r       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| meas    |         |         |         |                  |        |
| urement |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| rovided |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| m       |         |         |         |                  |        |
| easured |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| does    |         |         |         |                  |        |
| not     |         |         |         |                  |        |
| exceed  |         |         |         |                  |        |
| 5       |         |         |         |                  |        |
| pCi/l.  |         |         |         |                  |        |
| A gross |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| meas    |         |         |         |                  |        |
| urement |         |         |         |                  |        |
| may be  |         |         |         |                  |        |
| subs    |         |         |         |                  |        |
| tituted |         |         |         |                  |        |
| for the |         |         |         |                  |        |
| r       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| uranium |         |         |         |                  |        |
| meas    |         |         |         |                  |        |
| urement |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| rovided |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| m       |         |         |         |                  |        |
| easured |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| does    |         |         |         |                  |        |
| not     |         |         |         |                  |        |
| exceed  |         |         |         |                  |        |
| 15      |         |         |         |                  |        |
| pCi/l.  |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| meas    |         |         |         |                  |        |
| urement |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| have a  |         |         |         |                  |        |
| con     |         |         |         |                  |        |
| fidence |         |         |         |                  |        |
| i       |         |         |         |                  |        |
| nterval |         |         |         |                  |        |
| of 95%  |         |         |         |                  |        |
| (1.65σ, |         |         |         |                  |        |
| where σ |         |         |         |                  |        |
| is the  |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| tandard |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| viation |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| net     |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| ounting |         |         |         |                  |        |
| rate of |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| sample) |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| u       |         |         |         |                  |        |
| ranium. |         |         |         |                  |        |
| When a  |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| uses a  |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| meas    |         |         |         |                  |        |
| urement |         |         |         |                  |        |
| in lieu |         |         |         |                  |        |
| of a    |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and/or  |         |         |         |                  |        |
| uranium |         |         |         |                  |        |
| measu   |         |         |         |                  |        |
| rement, |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| ana     |         |         |         |                  |        |
| lytical |         |         |         |                  |        |
| result  |         |         |         |                  |        |
| will be |         |         |         |                  |        |
| used to |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| termine |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| future  |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| fr      |         |         |         |                  |        |
| equency |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and/or  |         |         |         |                  |        |
| u       |         |         |         |                  |        |
| ranium. |         |         |         |                  |        |
| If the  |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| result  |         |         |         |                  |        |
| is less |         |         |         |                  |        |
| than    |         |         |         |                  |        |
| det     |         |         |         |                  |        |
| ection, |         |         |         |                  |        |
| 2 the   |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| tection |         |         |         |                  |        |
| limit   |         |         |         |                  |        |
| will be |         |         |         |                  |        |
| used to |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| termine |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| and the |         |         |         |                  |        |
| future  |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| fre     |         |         |         |                  |        |
| quency. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Mon     |         |         | \       |                  |        |
| itoring |         |         | '141.26 |                  |        |
| and     |         |         | (b)     |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| requi   |         |         |         |                  |        |
| rements |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| photon  |         |         |         |                  |        |
| radioac |         |         |         |                  |        |
| tivity. |         |         |         |                  |        |
| To      |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| termine |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| levels  |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| \'14    |         |         |         |                  |        |
| 1.66(d) |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| photon  |         |         |         |                  |        |
| radioac |         |         |         |                  |        |
| tivity, |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| monitor |         |         |         |                  |        |
| at a    |         |         |         |                  |        |
| fr      |         |         |         |                  |        |
| equency |         |         |         |                  |        |
| as      |         |         |         |                  |        |
| f       |         |         |         |                  |        |
| ollows: |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Co      |         |         | \       |                  |        |
| mmunity |         |         | '141.26 |                  |        |
| water   |         |         | (b)(1)  |                  |        |
| systems |         |         |         |                  |        |
| (both   |         |         |         |                  |        |
| surface |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| ground  |         |         |         |                  |        |
| water)  |         |         |         |                  |        |
| des     |         |         |         |                  |        |
| ignated |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| as      |         |         |         |                  |        |
| vul     |         |         |         |                  |        |
| nerable |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| photon  |         |         |         |                  |        |
| radioac |         |         |         |                  |        |
| tivity. |         |         |         |                  |        |
| Systems |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| collect |         |         |         |                  |        |
| qu      |         |         |         |                  |        |
| arterly |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| e       |         |         |         |                  |        |
| mitters |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| annual  |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| tritium |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| stron   |         |         |         |                  |        |
| tium-90 |         |         |         |                  |        |
| at each |         |         |         |                  |        |
| entry   |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| to the  |         |         |         |                  |        |
| distr   |         |         |         |                  |        |
| ibution |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| (he     |         |         |         |                  |        |
| reafter |         |         |         |                  |        |
| called  |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point), |         |         |         |                  |        |
| be      |         |         |         |                  |        |
| ginning |         |         |         |                  |        |
| within  |         |         |         |                  |        |
| one     |         |         |         |                  |        |
| quarter |         |         |         |                  |        |
| after   |         |         |         |                  |        |
| being   |         |         |         |                  |        |
| n       |         |         |         |                  |        |
| otified |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| State.  |         |         |         |                  |        |
| Systems |         |         |         |                  |        |
| already |         |         |         |                  |        |
| des     |         |         |         |                  |        |
| ignated |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| ontinue |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| until   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| reviews |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| either  |         |         |         |                  |        |
| re      |         |         |         |                  |        |
| affirms |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| removes |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| desig   |         |         |         |                  |        |
| nation. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| If the  |         |         | \       |                  |        |
| gross   |         |         | '141.26 |                  |        |
| beta    |         |         | (b      |                  |        |
| p       |         |         | )(1)(i) |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| minus   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| na      |         |         |         |                  |        |
| turally |         |         |         |                  |        |
| oc      |         |         |         |                  |        |
| curring |         |         |         |                  |        |
| potas   |         |         |         |                  |        |
| sium-40 |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| at a    |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| has a   |         |         |         |                  |        |
| running |         |         |         |                  |        |
| annual  |         |         |         |                  |        |
| average |         |         |         |                  |        |
| (c      |         |         |         |                  |        |
| omputed |         |         |         |                  |        |
| qua     |         |         |         |                  |        |
| rterly) |         |         |         |                  |        |
| less    |         |         |         |                  |        |
| than or |         |         |         |                  |        |
| equal   |         |         |         |                  |        |
| to 50   |         |         |         |                  |        |
| pCi/L   |         |         |         |                  |        |
| (sc     |         |         |         |                  |        |
| reening |         |         |         |                  |        |
| level), |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| reduce  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| fr      |         |         |         |                  |        |
| equency |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| at that |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| to once |         |         |         |                  |        |
| every 3 |         |         |         |                  |        |
| years.  |         |         |         |                  |        |
| Systems |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| collect |         |         |         |                  |        |
| all     |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| r       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| pa      |         |         |         |                  |        |
| ragraph |         |         |         |                  |        |
| (b)(1)  |         |         |         |                  |        |
| of this |         |         |         |                  |        |
| section |         |         |         |                  |        |
| during  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| reduced |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| period. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| For     |         |         | \       |                  |        |
| systems |         |         | '141.26 |                  |        |
| in the  |         |         | (b)     |                  |        |
| v       |         |         | (1)(ii) |                  |        |
| icinity |         |         |         |                  |        |
| of a    |         |         |         |                  |        |
| nuclear |         |         |         |                  |        |
| fa      |         |         |         |                  |        |
| cility, |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| allow   |         |         |         |                  |        |
| the CWS |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| utilize |         |         |         |                  |        |
| enviro  |         |         |         |                  |        |
| nmental |         |         |         |                  |        |
| surve   |         |         |         |                  |        |
| illance |         |         |         |                  |        |
| data    |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| llected |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| nuclear |         |         |         |                  |        |
| f       |         |         |         |                  |        |
| acility |         |         |         |                  |        |
| in lieu |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| at the  |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ystem=s |         |         |         |                  |        |
| entry   |         |         |         |                  |        |
| po      |         |         |         |                  |        |
| int(s), |         |         |         |                  |        |
| where   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| det     |         |         |         |                  |        |
| ermines |         |         |         |                  |        |
| if such |         |         |         |                  |        |
| data is |         |         |         |                  |        |
| app     |         |         |         |                  |        |
| licable |         |         |         |                  |        |
| to a    |         |         |         |                  |        |
| par     |         |         |         |                  |        |
| ticular |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| system. |         |         |         |                  |        |
| In the  |         |         |         |                  |        |
| event   |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| there   |         |         |         |                  |        |
| is a    |         |         |         |                  |        |
| release |         |         |         |                  |        |
| from a  |         |         |         |                  |        |
| nuclear |         |         |         |                  |        |
| fa      |         |         |         |                  |        |
| cility, |         |         |         |                  |        |
| systems |         |         |         |                  |        |
| which   |         |         |         |                  |        |
| are     |         |         |         |                  |        |
| using   |         |         |         |                  |        |
| surve   |         |         |         |                  |        |
| illance |         |         |         |                  |        |
| data    |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| begin   |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| at the  |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mmunity |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ystem=s |         |         |         |                  |        |
| entry   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| oint(s) |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| acc     |         |         |         |                  |        |
| ordance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| pa      |         |         |         |                  |        |
| ragraph |         |         |         |                  |        |
| (b)(1). |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Co      |         |         | \       |                  |        |
| mmunity |         |         | '141.26 |                  |        |
| water   |         |         | (b)(2)  |                  |        |
| systems |         |         |         |                  |        |
| (both   |         |         |         |                  |        |
| surface |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| ground  |         |         |         |                  |        |
| water)  |         |         |         |                  |        |
| des     |         |         |         |                  |        |
| ignated |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| as      |         |         |         |                  |        |
| ut      |         |         |         |                  |        |
| ilizing |         |         |         |                  |        |
| waters  |         |         |         |                  |        |
| conta   |         |         |         |                  |        |
| minated |         |         |         |                  |        |
| by      |         |         |         |                  |        |
| ef      |         |         |         |                  |        |
| fluents |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| nuclear |         |         |         |                  |        |
| fac     |         |         |         |                  |        |
| ilities |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| photon  |         |         |         |                  |        |
| radioac |         |         |         |                  |        |
| tivity. |         |         |         |                  |        |
| Systems |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| collect |         |         |         |                  |        |
| qu      |         |         |         |                  |        |
| arterly |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| e       |         |         |         |                  |        |
| mitters |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| iod     |         |         |         |                  |        |
| ine-131 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| annual  |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| tritium |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| stron   |         |         |         |                  |        |
| tium-90 |         |         |         |                  |        |
| at each |         |         |         |                  |        |
| entry   |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| to the  |         |         |         |                  |        |
| distr   |         |         |         |                  |        |
| ibution |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| (he     |         |         |         |                  |        |
| reafter |         |         |         |                  |        |
| called  |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point), |         |         |         |                  |        |
| be      |         |         |         |                  |        |
| ginning |         |         |         |                  |        |
| within  |         |         |         |                  |        |
| one     |         |         |         |                  |        |
| quarter |         |         |         |                  |        |
| after   |         |         |         |                  |        |
| being   |         |         |         |                  |        |
| n       |         |         |         |                  |        |
| otified |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| State.  |         |         |         |                  |        |
| Systems |         |         |         |                  |        |
| already |         |         |         |                  |        |
| des     |         |         |         |                  |        |
| ignated |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| as      |         |         |         |                  |        |
| systems |         |         |         |                  |        |
| using   |         |         |         |                  |        |
| waters  |         |         |         |                  |        |
| conta   |         |         |         |                  |        |
| minated |         |         |         |                  |        |
| by      |         |         |         |                  |        |
| ef      |         |         |         |                  |        |
| fluents |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| nuclear |         |         |         |                  |        |
| fac     |         |         |         |                  |        |
| ilities |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| ontinue |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| until   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| reviews |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| either  |         |         |         |                  |        |
| re      |         |         |         |                  |        |
| affirms |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| removes |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| desig   |         |         |         |                  |        |
| nation. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Qu      |         |         | \       |                  |        |
| arterly |         |         | '141.26 |                  |        |
| mon     |         |         | (b      |                  |        |
| itoring |         |         | )(2)(i) |                  |        |
| for     |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| be      |         |         |         |                  |        |
| based   |         |         |         |                  |        |
| on the  |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| nalysis |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| monthly |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| or the  |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| nalysis |         |         |         |                  |        |
| of a    |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mposite |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| three   |         |         |         |                  |        |
| monthly |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| amples. |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| former  |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| recom   |         |         |         |                  |        |
| mended. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| For     |         |         | \       |                  |        |
| iodi    |         |         | '141.26 |                  |        |
| ne‑131, |         |         | (b)     |                  |        |
| a       |         |         | (2)(ii) |                  |        |
| co      |         |         |         |                  |        |
| mposite |         |         |         |                  |        |
| of five |         |         |         |                  |        |
| cons    |         |         |         |                  |        |
| ecutive |         |         |         |                  |        |
| daily   |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| be      |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| nalyzed |         |         |         |                  |        |
| once    |         |         |         |                  |        |
| each    |         |         |         |                  |        |
| q       |         |         |         |                  |        |
| uarter. |         |         |         |                  |        |
| As      |         |         |         |                  |        |
| ordered |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| State,  |         |         |         |                  |        |
| more    |         |         |         |                  |        |
| f       |         |         |         |                  |        |
| requent |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| be      |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| nducted |         |         |         |                  |        |
| when    |         |         |         |                  |        |
| iod     |         |         |         |                  |        |
| ine‑131 |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| ide     |         |         |         |                  |        |
| ntified |         |         |         |                  |        |
| in the  |         |         |         |                  |        |
| f       |         |         |         |                  |        |
| inished |         |         |         |                  |        |
| water.  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Annual  |         |         | \       |                  |        |
| mon     |         |         | '141.26 |                  |        |
| itoring |         |         | (b)(    |                  |        |
| for     |         |         | 2)(iii) |                  |        |
| stron   |         |         |         |                  |        |
| tium‑90 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| tritium |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| be      |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| nducted |         |         |         |                  |        |
| by      |         |         |         |                  |        |
| means   |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| nalysis |         |         |         |                  |        |
| of a    |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mposite |         |         |         |                  |        |
| of four |         |         |         |                  |        |
| cons    |         |         |         |                  |        |
| ecutive |         |         |         |                  |        |
| qu      |         |         |         |                  |        |
| arterly |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| nalysis |         |         |         |                  |        |
| of four |         |         |         |                  |        |
| qu      |         |         |         |                  |        |
| arterly |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| amples. |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| latter  |         |         |         |                  |        |
| pr      |         |         |         |                  |        |
| ocedure |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| recom   |         |         |         |                  |        |
| mended. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| If the  |         |         | \       |                  |        |
| gross   |         |         | '141.26 |                  |        |
| beta    |         |         | (b)     |                  |        |
| p       |         |         | (2)(iv) |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| minus   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| na      |         |         |         |                  |        |
| turally |         |         |         |                  |        |
| oc      |         |         |         |                  |        |
| curring |         |         |         |                  |        |
| potas   |         |         |         |                  |        |
| sium-40 |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| at a    |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| has a   |         |         |         |                  |        |
| running |         |         |         |                  |        |
| annual  |         |         |         |                  |        |
| average |         |         |         |                  |        |
| (c      |         |         |         |                  |        |
| omputed |         |         |         |                  |        |
| qua     |         |         |         |                  |        |
| rterly) |         |         |         |                  |        |
| less    |         |         |         |                  |        |
| than or |         |         |         |                  |        |
| equal   |         |         |         |                  |        |
| to 15   |         |         |         |                  |        |
| pCi/L,  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| reduce  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| fr      |         |         |         |                  |        |
| equency |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| at that |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| every 3 |         |         |         |                  |        |
| years.  |         |         |         |                  |        |
| Systems |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| collect |         |         |         |                  |        |
| all     |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| r       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| pa      |         |         |         |                  |        |
| ragraph |         |         |         |                  |        |
| (b)(2)  |         |         |         |                  |        |
| of this |         |         |         |                  |        |
| section |         |         |         |                  |        |
| during  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| reduced |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| period. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| For     |         |         | \       |                  |        |
| systems |         |         | '141.26 |                  |        |
| in the  |         |         | (b      |                  |        |
| v       |         |         | )(2)(v) |                  |        |
| icinity |         |         |         |                  |        |
| of a    |         |         |         |                  |        |
| nuclear |         |         |         |                  |        |
| fa      |         |         |         |                  |        |
| cility, |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| allow   |         |         |         |                  |        |
| the CWS |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| utilize |         |         |         |                  |        |
| enviro  |         |         |         |                  |        |
| nmental |         |         |         |                  |        |
| surve   |         |         |         |                  |        |
| illance |         |         |         |                  |        |
| data    |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| llected |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| nuclear |         |         |         |                  |        |
| f       |         |         |         |                  |        |
| acility |         |         |         |                  |        |
| in lieu |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| at the  |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ystem=s |         |         |         |                  |        |
| entry   |         |         |         |                  |        |
| po      |         |         |         |                  |        |
| int(s), |         |         |         |                  |        |
| where   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| det     |         |         |         |                  |        |
| ermines |         |         |         |                  |        |
| if such |         |         |         |                  |        |
| data is |         |         |         |                  |        |
| app     |         |         |         |                  |        |
| licable |         |         |         |                  |        |
| to a    |         |         |         |                  |        |
| par     |         |         |         |                  |        |
| ticular |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| system. |         |         |         |                  |        |
| In the  |         |         |         |                  |        |
| event   |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| there   |         |         |         |                  |        |
| is a    |         |         |         |                  |        |
| release |         |         |         |                  |        |
| from a  |         |         |         |                  |        |
| nuclear |         |         |         |                  |        |
| fa      |         |         |         |                  |        |
| cility, |         |         |         |                  |        |
| systems |         |         |         |                  |        |
| which   |         |         |         |                  |        |
| are     |         |         |         |                  |        |
| using   |         |         |         |                  |        |
| surve   |         |         |         |                  |        |
| illance |         |         |         |                  |        |
| data    |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| begin   |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| at the  |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mmunity |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ystem=s |         |         |         |                  |        |
| entry   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| oint(s) |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| acc     |         |         |         |                  |        |
| ordance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| pa      |         |         |         |                  |        |
| ragraph |         |         |         |                  |        |
| (b)(2). |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Co      |         |         | \       |                  |        |
| mmunity |         |         | '141.26 |                  |        |
| water   |         |         | (b)(3)  |                  |        |
| systems |         |         |         |                  |        |
| des     |         |         |         |                  |        |
| ignated |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| monitor |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| photon  |         |         |         |                  |        |
| radioa  |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| can not |         |         |         |                  |        |
| apply   |         |         |         |                  |        |
| to the  |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| for a   |         |         |         |                  |        |
| waiver  |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| freq    |         |         |         |                  |        |
| uencies |         |         |         |                  |        |
| sp      |         |         |         |                  |        |
| ecified |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| par     |         |         |         |                  |        |
| agraphs |         |         |         |                  |        |
| (b)(1)  |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| (b)(2)  |         |         |         |                  |        |
| of this |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ection. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Co      |         |         | \       |                  |        |
| mmunity |         |         | '141.26 |                  |        |
| water   |         |         | (b)(4)  |                  |        |
| systems |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| analyze |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| na      |         |         |         |                  |        |
| turally |         |         |         |                  |        |
| oc      |         |         |         |                  |        |
| curring |         |         |         |                  |        |
| potas   |         |         |         |                  |        |
| sium-40 |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| same or |         |         |         |                  |        |
| equ     |         |         |         |                  |        |
| ivalent |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| used    |         |         |         |                  |        |
| for the |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| an      |         |         |         |                  |        |
| alysis. |         |         |         |                  |        |
| Systems |         |         |         |                  |        |
| are     |         |         |         |                  |        |
| allowed |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ubtract |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| potas   |         |         |         |                  |        |
| sium-40 |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| value   |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| total   |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| value   |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| termine |         |         |         |                  |        |
| if the  |         |         |         |                  |        |
| sc      |         |         |         |                  |        |
| reening |         |         |         |                  |        |
| level   |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| ex      |         |         |         |                  |        |
| ceeded. |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| potas   |         |         |         |                  |        |
| sium-40 |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| must be |         |         |         |                  |        |
| cal     |         |         |         |                  |        |
| culated |         |         |         |                  |        |
| by      |         |         |         |                  |        |
| mult    |         |         |         |                  |        |
| iplying |         |         |         |                  |        |
| el      |         |         |         |                  |        |
| emental |         |         |         |                  |        |
| po      |         |         |         |                  |        |
| tassium |         |         |         |                  |        |
| concent |         |         |         |                  |        |
| rations |         |         |         |                  |        |
| (in     |         |         |         |                  |        |
| mg/L)   |         |         |         |                  |        |
| by a    |         |         |         |                  |        |
| factor  |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| 0.82.   |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| If the  |         |         | \       |                  |        |
| gross   |         |         | '141.26 |                  |        |
| beta    |         |         | (b)(5)  |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| minus   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| na      |         |         |         |                  |        |
| turally |         |         |         |                  |        |
| oc      |         |         |         |                  |        |
| curring |         |         |         |                  |        |
| potas   |         |         |         |                  |        |
| sium-40 |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| exceeds |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| sc      |         |         |         |                  |        |
| reening |         |         |         |                  |        |
| level,  |         |         |         |                  |        |
| an      |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| nalysis |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| must be |         |         |         |                  |        |
| pe      |         |         |         |                  |        |
| rformed |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| i       |         |         |         |                  |        |
| dentify |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| major   |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| oactive |         |         |         |                  |        |
| const   |         |         |         |                  |        |
| ituents |         |         |         |                  |        |
| present |         |         |         |                  |        |
| in the  |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| and the |         |         |         |                  |        |
| appr    |         |         |         |                  |        |
| opriate |         |         |         |                  |        |
| doses   |         |         |         |                  |        |
| must be |         |         |         |                  |        |
| cal     |         |         |         |                  |        |
| culated |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| summed  |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| termine |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| \       |         |         |         |                  |        |
| '141.66 |         |         |         |                  |        |
| (d)(1), |         |         |         |                  |        |
| using   |         |         |         |                  |        |
| (d)(2). |         |         |         |                  |        |
| Doses   |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| also be |         |         |         |                  |        |
| cal     |         |         |         |                  |        |
| culated |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| m       |         |         |         |                  |        |
| easured |         |         |         |                  |        |
| levels  |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| tritium |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| st      |         |         |         |                  |        |
| rontium |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| termine |         |         |         |                  |        |
| comp    |         |         |         |                  |        |
| liance. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Systems |         |         | \       |                  |        |
| must    |         |         | '141.26 |                  |        |
| monitor |         |         | (b)(6)  |                  |        |
| monthly |         |         |         |                  |        |
| at the  |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| oint(s) |         |         |         |                  |        |
| which   |         |         |         |                  |        |
| exceed  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| level   |         |         |         |                  |        |
| in \'   |         |         |         |                  |        |
| 14      |         |         |         |                  |        |
| 1.66(d) |         |         |         |                  |        |
| be      |         |         |         |                  |        |
| ginning |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| month   |         |         |         |                  |        |
| after   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| exc     |         |         |         |                  |        |
| eedance |         |         |         |                  |        |
| occurs. |         |         |         |                  |        |
| Systems |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| ontinue |         |         |         |                  |        |
| monthly |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| until   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| has     |         |         |         |                  |        |
| estab   |         |         |         |                  |        |
| lished, |         |         |         |                  |        |
| by a    |         |         |         |                  |        |
| rolling |         |         |         |                  |        |
| average |         |         |         |                  |        |
| of 3    |         |         |         |                  |        |
| monthly |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| amples, |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| the MCL |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| being   |         |         |         |                  |        |
| met.    |         |         |         |                  |        |
| Systems |         |         |         |                  |        |
| who     |         |         |         |                  |        |
| es      |         |         |         |                  |        |
| tablish |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| the MCL |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| being   |         |         |         |                  |        |
| met     |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| return  |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| qu      |         |         |         |                  |        |
| arterly |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| until   |         |         |         |                  |        |
| they    |         |         |         |                  |        |
| meet    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| requi   |         |         |         |                  |        |
| rements |         |         |         |                  |        |
| set     |         |         |         |                  |        |
| forth   |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| par     |         |         |         |                  |        |
| agraphs |         |         |         |                  |        |
| (b)     |         |         |         |                  |        |
| (1)(ii) |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| (b      |         |         |         |                  |        |
| )(2)(i) |         |         |         |                  |        |
| of this |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ection. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| General |         |         | \       |                  |        |
| mon     |         |         | '141.26 |                  |        |
| itoring |         |         | (c)     |                  |        |
| and     |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| requi   |         |         |         |                  |        |
| rements |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| radionu |         |         |         |                  |        |
| clides. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| The     |         |         | \       |                  |        |
| State   |         |         | '141.26 |                  |        |
| may     |         |         | (c)(1)  |                  |        |
| require |         |         |         |                  |        |
| more    |         |         |         |                  |        |
| f       |         |         |         |                  |        |
| requent |         |         |         |                  |        |
| mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| than    |         |         |         |                  |        |
| sp      |         |         |         |                  |        |
| ecified |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| par     |         |         |         |                  |        |
| agraphs |         |         |         |                  |        |
| (a) and |         |         |         |                  |        |
| (b) of  |         |         |         |                  |        |
| this    |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ection, |         |         |         |                  |        |
| or may  |         |         |         |                  |        |
| require |         |         |         |                  |        |
| confi   |         |         |         |                  |        |
| rmation |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| at its  |         |         |         |                  |        |
| disc    |         |         |         |                  |        |
| retion. |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| results |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| initial |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| confi   |         |         |         |                  |        |
| rmation |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| will be |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| veraged |         |         |         |                  |        |
| for use |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| etermin |         |         |         |                  |        |
| ations. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Each    |         |         | \       |                  |        |
| public  |         |         | '141.26 |                  |        |
| water   |         |         | (c)(2)  |                  |        |
| system  |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| monitor |         |         |         |                  |        |
| at the  |         |         |         |                  |        |
| time    |         |         |         |                  |        |
| des     |         |         |         |                  |        |
| ignated |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| during  |         |         |         |                  |        |
| each    |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| period. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Comp    |         |         | \       |                  |        |
| liance: |         |         | '141.26 |                  |        |
| Com     |         |         | (c)(3)  |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| 141.66  |         |         |         |                  |        |
| (b)     |         |         |         |                  |        |
| through |         |         |         |                  |        |
| (e)     |         |         |         |                  |        |
| will be |         |         |         |                  |        |
| det     |         |         |         |                  |        |
| ermined |         |         |         |                  |        |
| based   |         |         |         |                  |        |
| on the  |         |         |         |                  |        |
| ana     |         |         |         |                  |        |
| lytical |         |         |         |                  |        |
| re      |         |         |         |                  |        |
| sult(s) |         |         |         |                  |        |
| o       |         |         |         |                  |        |
| btained |         |         |         |                  |        |
| at each |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point.  |         |         |         |                  |        |
| If one  |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| is in   |         |         |         |                  |        |
| vi      |         |         |         |                  |        |
| olation |         |         |         |                  |        |
| of an   |         |         |         |                  |        |
| MCL,    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| is in   |         |         |         |                  |        |
| vi      |         |         |         |                  |        |
| olation |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| MCL.    |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| For     |         |         | \       |                  |        |
| systems |         |         | '141.26 |                  |        |
| mon     |         |         | (c      |                  |        |
| itoring |         |         | )(3)(i) |                  |        |
| more    |         |         |         |                  |        |
| than    |         |         |         |                  |        |
| once    |         |         |         |                  |        |
| per     |         |         |         |                  |        |
| year,   |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the MCL |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| det     |         |         |         |                  |        |
| ermined |         |         |         |                  |        |
| by a    |         |         |         |                  |        |
| running |         |         |         |                  |        |
| annual  |         |         |         |                  |        |
| average |         |         |         |                  |        |
| at each |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point.  |         |         |         |                  |        |
| If the  |         |         |         |                  |        |
| average |         |         |         |                  |        |
| of any  |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| greater |         |         |         |                  |        |
| than    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| MCL,    |         |         |         |                  |        |
| then    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| is out  |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| MCL.    |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| For     |         |         | \       |                  |        |
| systems |         |         | '141.26 |                  |        |
| mon     |         |         | (c)     |                  |        |
| itoring |         |         | (3)(ii) |                  |        |
| more    |         |         |         |                  |        |
| than    |         |         |         |                  |        |
| once a  |         |         |         |                  |        |
| year,   |         |         |         |                  |        |
| if any  |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| result  |         |         |         |                  |        |
| will    |         |         |         |                  |        |
| cause   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| running |         |         |         |                  |        |
| average |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| exceed  |         |         |         |                  |        |
| the MCL |         |         |         |                  |        |
| at any  |         |         |         |                  |        |
| sample  |         |         |         |                  |        |
| point,  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| is out  |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the MCL |         |         |         |                  |        |
| immed   |         |         |         |                  |        |
| iately. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Systems |         |         | \       |                  |        |
| must    |         |         | '141.26 |                  |        |
| include |         |         | (c)(    |                  |        |
| all     |         |         | 3)(iii) |                  |        |
| samples |         |         |         |                  |        |
| taken   |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| nalyzed |         |         |         |                  |        |
| under   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| pro     |         |         |         |                  |        |
| visions |         |         |         |                  |        |
| of this |         |         |         |                  |        |
| section |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| dete    |         |         |         |                  |        |
| rmining |         |         |         |                  |        |
| comp    |         |         |         |                  |        |
| liance, |         |         |         |                  |        |
| even if |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| number  |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| greater |         |         |         |                  |        |
| than    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| minimum |         |         |         |                  |        |
| re      |         |         |         |                  |        |
| quired. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| If a    |         |         | \       |                  |        |
| system  |         |         | '141.26 |                  |        |
| does    |         |         | (c)     |                  |        |
| not     |         |         | (3)(iv) |                  |        |
| collect |         |         |         |                  |        |
| all     |         |         |         |                  |        |
| r       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| when    |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| based   |         |         |         |                  |        |
| on a    |         |         |         |                  |        |
| running |         |         |         |                  |        |
| annual  |         |         |         |                  |        |
| average |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| qu      |         |         |         |                  |        |
| arterly |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| amples, |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| will be |         |         |         |                  |        |
| based   |         |         |         |                  |        |
| on the  |         |         |         |                  |        |
| running |         |         |         |                  |        |
| average |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| samples |         |         |         |                  |        |
| col     |         |         |         |                  |        |
| lected. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| If a    |         |         | \       |                  |        |
| sample  |         |         | '141.26 |                  |        |
| result  |         |         | (c      |                  |        |
| is less |         |         | )(3)(v) |                  |        |
| than    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| tection |         |         |         |                  |        |
| limit,  |         |         |         |                  |        |
| zero    |         |         |         |                  |        |
| will be |         |         |         |                  |        |
| used to |         |         |         |                  |        |
| ca      |         |         |         |                  |        |
| lculate |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| annual  |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| verage, |         |         |         |                  |        |
| unless  |         |         |         |                  |        |
| a gross |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| being   |         |         |         |                  |        |
| used in |         |         |         |                  |        |
| lieu of |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and/or  |         |         |         |                  |        |
| u       |         |         |         |                  |        |
| ranium. |         |         |         |                  |        |
| If the  |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| result  |         |         |         |                  |        |
| is less |         |         |         |                  |        |
| than    |         |         |         |                  |        |
| det     |         |         |         |                  |        |
| ection, |         |         |         |                  |        |
| 2 the   |         |         |         |                  |        |
| de      |         |         |         |                  |        |
| tection |         |         |         |                  |        |
| limit   |         |         |         |                  |        |
| will be |         |         |         |                  |        |
| used to |         |         |         |                  |        |
| ca      |         |         |         |                  |        |
| lculate |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| annual  |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| verage. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| States  |         |         | \       |                  |        |
| have    |         |         | '141.26 |                  |        |
| the     |         |         | (c)(4)  |                  |        |
| dis     |         |         |         |                  |        |
| cretion |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| delete  |         |         |         |                  |        |
| results |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| obvious |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ampling |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| nalytic |         |         |         |                  |        |
| errors. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| If the  |         |         | \       |                  |        |
| MCL for |         |         | '141.26 |                  |        |
| radioa  |         |         | (c)(5)  |                  |        |
| ctivity |         |         |         |                  |        |
| set     |         |         |         |                  |        |
| forth   |         |         |         |                  |        |
| in \'   |         |         |         |                  |        |
| 14      |         |         |         |                  |        |
| 1.66(b) |         |         |         |                  |        |
| through |         |         |         |                  |        |
| (e) is  |         |         |         |                  |        |
| ex      |         |         |         |                  |        |
| ceeded, |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| o       |         |         |         |                  |        |
| perator |         |         |         |                  |        |
| of a    |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mmunity |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| give    |         |         |         |                  |        |
| notice  |         |         |         |                  |        |
| to the  |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| ursuant |         |         |         |                  |        |
| to \'   |         |         |         |                  |        |
| 141.31  |         |         |         |                  |        |
| and to  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| public  |         |         |         |                  |        |
| as      |         |         |         |                  |        |
| r       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| by      |         |         |         |                  |        |
| subpart |         |         |         |                  |        |
| Q of    |         |         |         |                  |        |
| this    |         |         |         |                  |        |
| part.   |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **[     |         |         |         |                  |        |
| Subpart |         |         |         |                  |        |
| F -     |         |         |         |                  |        |
| Maximum |         |         |         |                  |        |
| Cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| Level   |         |         |         |                  |        |
| Goals   |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Maximum |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| esidual |         |         |         |                  |        |
| Disin   |         |         |         |                  |        |
| fectant |         |         |         |                  |        |
| Level   |         |         |         |                  |        |
| Goals]  |         |         |         |                  |        |
| {.small |         |         |         |                  |        |
| caps}** |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **\'    |         |         |         |                  |        |
| [141.55 |         |         |         |                  |        |
| Maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| level   |         |         |         |                  |        |
| goals   |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| Radionu |         |         |         |                  |        |
| clides] |         |         |         |                  |        |
| {.small |         |         |         |                  |        |
| caps}** |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| [Con    |         |         | \'      |                  |        |
| taminan |         |         | 141.55  |                  |        |
| t]{.und |         |         |         |                  |        |
| erline} |         |         |         |                  |        |
| [MCL    |         |         |         |                  |        |
| G]{.und |         |         |         |                  |        |
| erline} |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 1\.     |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| radium  |         |         |         |                  |        |
| -228    |         |         |         |                  |        |
| Zero    |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 2\.     |         |         |         |                  |        |
| Gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| Zero    |         |         |         |                  |        |
|         |         |         |         |                  |        |
| (ex     |         |         |         |                  |        |
| cluding |         |         |         |                  |        |
| radon   |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| u       |         |         |         |                  |        |
| ranium) |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 3\.     |         |         |         |                  |        |
| Beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| photon  |         |         |         |                  |        |
| radioa  |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| Zero    |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 4\.     |         |         |         |                  |        |
| Uranium |         |         |         |                  |        |
| Zero    |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **[     |         |         |         |                  |        |
| Subpart |         |         |         |                  |        |
| G]{.    |         |         |         |                  |        |
| smallca |         |         |         |                  |        |
| ps}** - |         |         |         |                  |        |
| **[     |         |         |         |                  |        |
| NRPDWR: |         |         |         |                  |        |
| Maximum |         |         |         |                  |        |
| Cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| Levels  |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Maximum |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| esidual |         |         |         |                  |        |
| Disin   |         |         |         |                  |        |
| fectant |         |         |         |                  |        |
| Levels] |         |         |         |                  |        |
| {.small |         |         |         |                  |        |
| caps}** |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **\'    |         |         |         |                  |        |
| [141.66 |         |         |         |                  |        |
| Maximum |         |         |         |                  |        |
| Cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| Levels  |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| Radionu |         |         |         |                  |        |
| clides] |         |         |         |                  |        |
| {.small |         |         |         |                  |        |
| caps}** |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| \[res   |         |         | \'      |                  |        |
| erved\] |         |         | 141.66  |                  |        |
|         |         |         | (a)     |                  |        |
+---------+---------+---------+---------+------------------+--------+
| MCL for |         |         | \'      |                  |        |
| c       |         |         | 141.66  |                  |        |
| ombined |         |         | (b)     |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| 228.    |         |         |         |                  |        |
|         |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| level   |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-228 |         |         |         |                  |        |
| is 5    |         |         |         |                  |        |
| pCi/L.  |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-228 |         |         |         |                  |        |
| value   |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| det     |         |         |         |                  |        |
| ermined |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ddition |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| results |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| nalysis |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and the |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| nalysis |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| um-228. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| MCL for |         |         | \'      |                  |        |
| gross   |         |         | 141.66  |                  |        |
| alpha   |         |         | (c)     |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| (ex     |         |         |         |                  |        |
| cluding |         |         |         |                  |        |
| radon   |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| ur      |         |         |         |                  |        |
| anium). |         |         |         |                  |        |
|         |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| level   |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| (in     |         |         |         |                  |        |
| cluding |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| but     |         |         |         |                  |        |
| ex      |         |         |         |                  |        |
| cluding |         |         |         |                  |        |
| radon   |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| u       |         |         |         |                  |        |
| ranium) |         |         |         |                  |        |
| is 15   |         |         |         |                  |        |
| pCi/L.  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| MCL for |         |         | \'      |                  |        |
| beta    |         |         | 141.66  |                  |        |
| p       |         |         | (d)     |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| photon  |         |         |         |                  |        |
| radioac |         |         |         |                  |        |
| tivity. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| The     |         |         | \'      |                  |        |
| average |         |         | 141.66  |                  |        |
| annual  |         |         | (d)(1)  |                  |        |
| concen  |         |         |         |                  |        |
| tration |         |         |         |                  |        |
| of beta |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| photon  |         |         |         |                  |        |
| radioa  |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| m       |         |         |         |                  |        |
| an-made |         |         |         |                  |        |
| radion  |         |         |         |                  |        |
| uclides |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| rinking |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| not     |         |         |         |                  |        |
| produce |         |         |         |                  |        |
| an      |         |         |         |                  |        |
| annual  |         |         |         |                  |        |
| dose    |         |         |         |                  |        |
| equ     |         |         |         |                  |        |
| ivalent |         |         |         |                  |        |
| to the  |         |         |         |                  |        |
| total   |         |         |         |                  |        |
| body or |         |         |         |                  |        |
| any     |         |         |         |                  |        |
| i       |         |         |         |                  |        |
| nternal |         |         |         |                  |        |
| organ   |         |         |         |                  |        |
| greater |         |         |         |                  |        |
| than 4  |         |         |         |                  |        |
| millir  |         |         |         |                  |        |
| em/year |         |         |         |                  |        |
| (mrem   |         |         |         |                  |        |
| /year). |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Except  |         |         | \'      |                  |        |
| for the |         |         | 141.66  |                  |        |
| radion  |         |         | (d)(2)  |                  |        |
| uclides |         |         |         |                  |        |
| listed  |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| Table   |         |         |         |                  |        |
| A, the  |         |         |         |                  |        |
| concen  |         |         |         |                  |        |
| tration |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| m       |         |         |         |                  |        |
| an-made |         |         |         |                  |        |
| radion  |         |         |         |                  |        |
| uclides |         |         |         |                  |        |
| causing |         |         |         |                  |        |
| 4 mrem  |         |         |         |                  |        |
| total   |         |         |         |                  |        |
| body or |         |         |         |                  |        |
| organ   |         |         |         |                  |        |
| dose    |         |         |         |                  |        |
| equi    |         |         |         |                  |        |
| valents |         |         |         |                  |        |
| must be |         |         |         |                  |        |
| cal     |         |         |         |                  |        |
| culated |         |         |         |                  |        |
| on the  |         |         |         |                  |        |
| basis   |         |         |         |                  |        |
| of 2    |         |         |         |                  |        |
| liter   |         |         |         |                  |        |
| per day |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| rinking |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| intake  |         |         |         |                  |        |
| using   |         |         |         |                  |        |
| the 168 |         |         |         |                  |        |
| hour    |         |         |         |                  |        |
| data    |         |         |         |                  |        |
| list in |         |         |         |                  |        |
| *A      |         |         |         |                  |        |
| Maximum |         |         |         |                  |        |
| Perm    |         |         |         |                  |        |
| issible |         |         |         |                  |        |
| Body    |         |         |         |                  |        |
| Burdens |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Maximum |         |         |         |                  |        |
| Perm    |         |         |         |                  |        |
| issible |         |         |         |                  |        |
| Concent |         |         |         |                  |        |
| rations |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| Radion  |         |         |         |                  |        |
| uclides |         |         |         |                  |        |
| in Air  |         |         |         |                  |        |
| and in  |         |         |         |                  |        |
| Water   |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| Occup   |         |         |         |                  |        |
| ational |         |         |         |                  |        |
| Expo    |         |         |         |                  |        |
| sure,@* |         |         |         |                  |        |
| NBS     |         |         |         |                  |        |
| (N      |         |         |         |                  |        |
| ational |         |         |         |                  |        |
| Bureau  |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| Sta     |         |         |         |                  |        |
| ndards) |         |         |         |                  |        |
| H       |         |         |         |                  |        |
| andbook |         |         |         |                  |        |
| 69 as   |         |         |         |                  |        |
| amended |         |         |         |                  |        |
| August  |         |         |         |                  |        |
| 1963,   |         |         |         |                  |        |
| U.S.    |         |         |         |                  |        |
| Dep     |         |         |         |                  |        |
| artment |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| Co      |         |         |         |                  |        |
| mmerce. |         |         |         |                  |        |
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| oration |         |         |         |                  |        |
| by      |         |         |         |                  |        |
| re      |         |         |         |                  |        |
| ference |         |         |         |                  |        |
| was     |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| pproved |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| irector |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| Federal |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| egister |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| acc     |         |         |         |                  |        |
| ordance |         |         |         |                  |        |
| with 5  |         |         |         |                  |        |
| U.S.C.  |         |         |         |                  |        |
| 552(a)  |         |         |         |                  |        |
| and 1   |         |         |         |                  |        |
| CFR     |         |         |         |                  |        |
| part    |         |         |         |                  |        |
| 51.     |         |         |         |                  |        |
| Copies  |         |         |         |                  |        |
| of this |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| ocument |         |         |         |                  |        |
| are     |         |         |         |                  |        |
| av      |         |         |         |                  |        |
| ailable |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| N       |         |         |         |                  |        |
| ational |         |         |         |                  |        |
| Te      |         |         |         |                  |        |
| chnical |         |         |         |                  |        |
| Info    |         |         |         |                  |        |
| rmation |         |         |         |                  |        |
| S       |         |         |         |                  |        |
| ervice, |         |         |         |                  |        |
| NTIS    |         |         |         |                  |        |
| ADA 280 |         |         |         |                  |        |
| 282,    |         |         |         |                  |        |
| U.S.    |         |         |         |                  |        |
| Dep     |         |         |         |                  |        |
| artment |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| Co      |         |         |         |                  |        |
| mmerce, |         |         |         |                  |        |
| 5285    |         |         |         |                  |        |
| Port    |         |         |         |                  |        |
| Royal   |         |         |         |                  |        |
| Road,   |         |         |         |                  |        |
| Sprin   |         |         |         |                  |        |
| gfield, |         |         |         |                  |        |
| V       |         |         |         |                  |        |
| irginia |         |         |         |                  |        |
| 22161.  |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| ll‑free |         |         |         |                  |        |
| number  |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| 800‑55  |         |         |         |                  |        |
| 3‑6847. |         |         |         |                  |        |
| Copies  |         |         |         |                  |        |
| may be  |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| spected |         |         |         |                  |        |
| at      |         |         |         |                  |        |
| EPA\'s  |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| rinking |         |         |         |                  |        |
| Water   |         |         |         |                  |        |
| Docket, |         |         |         |                  |        |
| 401 M   |         |         |         |                  |        |
| Street, |         |         |         |                  |        |
| SW.,    |         |         |         |                  |        |
| Wash    |         |         |         |                  |        |
| ington, |         |         |         |                  |        |
| DC      |         |         |         |                  |        |
| 20460;  |         |         |         |                  |        |
| or at   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| Office  |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| Federal |         |         |         |                  |        |
| Re      |         |         |         |                  |        |
| gister, |         |         |         |                  |        |
| 800     |         |         |         |                  |        |
| North   |         |         |         |                  |        |
| Capitol |         |         |         |                  |        |
| Street, |         |         |         |                  |        |
| NW.,    |         |         |         |                  |        |
| Suite   |         |         |         |                  |        |
| 700,    |         |         |         |                  |        |
| Wash    |         |         |         |                  |        |
| ington, |         |         |         |                  |        |
| DC. If  |         |         |         |                  |        |
| two or  |         |         |         |                  |        |
| more    |         |         |         |                  |        |
| radion  |         |         |         |                  |        |
| uclides |         |         |         |                  |        |
| are     |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| resent, |         |         |         |                  |        |
| the sum |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| their   |         |         |         |                  |        |
| annual  |         |         |         |                  |        |
| dose    |         |         |         |                  |        |
| equ     |         |         |         |                  |        |
| ivalent |         |         |         |                  |        |
| to the  |         |         |         |                  |        |
| total   |         |         |         |                  |        |
| body or |         |         |         |                  |        |
| to any  |         |         |         |                  |        |
| organ   |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| not     |         |         |         |                  |        |
| exceed  |         |         |         |                  |        |
| 4       |         |         |         |                  |        |
| mre     |         |         |         |                  |        |
| m/year. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Table   |         |         | \'      |                  |        |
| A -     |         |         | 141.66  |                  |        |
| Average |         |         | (d)(2)  |                  |        |
| Annual  |         |         |         |                  |        |
| Concent |         |         | Table A |                  |        |
| rations |         |         |         |                  |        |
| Assumed |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| Produce |         |         |         |                  |        |
| A Total |         |         |         |                  |        |
| Body or |         |         |         |                  |        |
| Organ   |         |         |         |                  |        |
| Dose of |         |         |         |                  |        |
| 4       |         |         |         |                  |        |
| mrem/yr |         |         |         |                  |        |
|         |         |         |         |                  |        |
| [Radio  |         |         |         |                  |        |
| nuclide |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| ritical |         |         |         |                  |        |
| Organ   |         |         |         |                  |        |
| pCi per |         |         |         |                  |        |
| Lite    |         |         |         |                  |        |
| r]{.und |         |         |         |                  |        |
| erline} |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Tritium |         |         |         |                  |        |
| Total   |         |         |         |                  |        |
| body    |         |         |         |                  |        |
| 20,000  |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Stron   |         |         |         |                  |        |
| tium-90 |         |         |         |                  |        |
| Bone    |         |         |         |                  |        |
| marrow  |         |         |         |                  |        |
| 8       |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| MCL for |         |         | \'      |                  |        |
| u       |         |         | 141.66  |                  |        |
| ranium. |         |         | (e)     |                  |        |
|         |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| level   |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| uranium |         |         |         |                  |        |
| is 30   |         |         |         |                  |        |
| g/L.   |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Com     |         |         | \'      |                  |        |
| pliance |         |         | 141.66  |                  |        |
| dates   |         |         | (f)     |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Com     |         |         | \'      |                  |        |
| pliance |         |         | 141.66  |                  |        |
| dates   |         |         | (f)(1)  |                  |        |
| for     |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| radium  |         |         |         |                  |        |
| 226 and |         |         |         |                  |        |
| 228,    |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| ac      |         |         |         |                  |        |
| tivity, |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| photon  |         |         |         |                  |        |
| radioac |         |         |         |                  |        |
| tivity, |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| u       |         |         |         |                  |        |
| ranium: |         |         |         |                  |        |
| Co      |         |         |         |                  |        |
| mmunity |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| systems |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| comply  |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| MCLs    |         |         |         |                  |        |
| listed  |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| par     |         |         |         |                  |        |
| agraphs |         |         |         |                  |        |
| (b),    |         |         |         |                  |        |
| (c),    |         |         |         |                  |        |
| (d) and |         |         |         |                  |        |
| (e) of  |         |         |         |                  |        |
| this    |         |         |         |                  |        |
| section |         |         |         |                  |        |
| be      |         |         |         |                  |        |
| ginning |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| ecember |         |         |         |                  |        |
| 8, 2003 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| be      |         |         |         |                  |        |
| det     |         |         |         |                  |        |
| ermined |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| acc     |         |         |         |                  |        |
| ordance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| requi   |         |         |         |                  |        |
| rements |         |         |         |                  |        |
| of \'   |         |         |         |                  |        |
| 141.25  |         |         |         |                  |        |
| and \'  |         |         |         |                  |        |
| 141.26. |         |         |         |                  |        |
| Com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| re      |         |         |         |                  |        |
| porting |         |         |         |                  |        |
| requi   |         |         |         |                  |        |
| rements |         |         |         |                  |        |
| for the |         |         |         |                  |        |
| radion  |         |         |         |                  |        |
| uclides |         |         |         |                  |        |
| under   |         |         |         |                  |        |
| A       |         |         |         |                  |        |
| ppendix |         |         |         |                  |        |
| A to    |         |         |         |                  |        |
| Subpart |         |         |         |                  |        |
| O and   |         |         |         |                  |        |
| A       |         |         |         |                  |        |
| ppendix |         |         |         |                  |        |
| A and B |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| Subpart |         |         |         |                  |        |
| Q is    |         |         |         |                  |        |
| r       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| on      |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| ecember |         |         |         |                  |        |
| 8,      |         |         |         |                  |        |
| 2003.   |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Best    |         |         | \'      |                  |        |
| Av      |         |         | 141.66  |                  |        |
| ailable |         |         | (g)     |                  |        |
| Techn   |         |         |         |                  |        |
| ologies |         |         |         |                  |        |
| (BATs)  |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| Radionu |         |         |         |                  |        |
| clides. |         |         |         |                  |        |
|         |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| Adminis |         |         |         |                  |        |
| trator, |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| ursuant |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| section |         |         |         |                  |        |
| 1412 of |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| Act,    |         |         |         |                  |        |
| hereby  |         |         |         |                  |        |
| ide     |         |         |         |                  |        |
| ntifies |         |         |         |                  |        |
| as      |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| dicated |         |         |         |                  |        |
| in the  |         |         |         |                  |        |
| fo      |         |         |         |                  |        |
| llowing |         |         |         |                  |        |
| table   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| best    |         |         |         |                  |        |
| tec     |         |         |         |                  |        |
| hnology |         |         |         |                  |        |
| av      |         |         |         |                  |        |
| ailable |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| ac      |         |         |         |                  |        |
| hieving |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| levels  |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and and |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| um-228, |         |         |         |                  |        |
| u       |         |         |         |                  |        |
| ranium, |         |         |         |                  |        |
| gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| ac      |         |         |         |                  |        |
| tivity, |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| photon  |         |         |         |                  |        |
| radioac |         |         |         |                  |        |
| tivity. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| *       | **BAT** |         | \'      |                  |        |
| *Contam |         |         | 141.66  |                  |        |
| inant** |         |         | (g)     |                  |        |
|         |         |         |         |                  |        |
|         |         |         | Table B |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 1\.     | Ion     |         |         |                  |        |
| C       | Ex      |         |         |                  |        |
| ombined | change, |         |         |                  |        |
| Rad     | Reverse |         |         |                  |        |
| ium-226 | O       |         |         |                  |        |
| and     | smosis, |         |         |                  |        |
| Rad     | Lime    |         |         |                  |        |
| ium-228 | So      |         |         |                  |        |
|         | ftening |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 2\.     | Ion     |         |         |                  |        |
| Uranium | Ex      |         |         |                  |        |
|         | change, |         |         |                  |        |
|         | Reverse |         |         |                  |        |
|         | O       |         |         |                  |        |
|         | smosis, |         |         |                  |        |
|         | Lime    |         |         |                  |        |
|         | Sof     |         |         |                  |        |
|         | tening, |         |         |                  |        |
|         | C       |         |         |                  |        |
|         | oagulat |         |         |                  |        |
|         | ion/Fil |         |         |                  |        |
|         | tration |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 3\.     | Reverse |         |         |                  |        |
| Gross   | Osmosis |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| (Ex     |         |         |         |                  |        |
| cluding |         |         |         |                  |        |
| Radon   |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| U       |         |         |         |                  |        |
| ranium) |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 4\.     | Ion     |         |         |                  |        |
| Beta    | Ex      |         |         |                  |        |
| P       | change, |         |         |                  |        |
| article | Reverse |         |         |                  |        |
| and     | Osmosis |         |         |                  |        |
| Photon  |         |         |         |                  |        |
| Radioa  |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| List of |         |         |         | \' 141.66 (h)    |        |
| Small   |         |         |         |                  |        |
| Systems |         |         |         | Table C          |        |
| Com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| Techn   |         |         |         |                  |        |
| ologies |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| Radion  |         |         |         |                  |        |
| uclides |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Limi    |         |         |         |                  |        |
| tations |         |         |         |                  |        |
| to Use  |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Limi    |         |         |         |                  |        |
| tations |         |         |         |                  |        |
| O       |         |         |         |                  |        |
| perator |         |         |         |                  |        |
| Skill   |         |         |         |                  |        |
| Raw     |         |         |         |                  |        |
| Water   |         |         |         |                  |        |
| Quality |         |         |         |                  |        |
| Range   |         |         |         |                  |        |
|         |         |         |         |                  |        |
| (see    |         |         |         |                  |        |
| foo     |         |         |         |                  |        |
| tnotes) |         |         |         |                  |        |
| Level   |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Conside |         |         |         |                  |        |
| rations |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 1\. Ion |         |         |         |                  |        |
| E       |         |         |         |                  |        |
| xchange |         |         |         |                  |        |
| (IE)    |         |         |         |                  |        |
|         |         |         |         |                  |        |
| \(a\)   |         |         |         |                  |        |
| Inter   |         |         |         |                  |        |
| mediate |         |         |         |                  |        |
| All     |         |         |         |                  |        |
| ground  |         |         |         |                  |        |
| waters  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 2\.     |         |         |         |                  |        |
| Point   |         |         |         |                  |        |
| of Use  |         |         |         |                  |        |
| (       |         |         |         |                  |        |
| POU^2^) |         |         |         |                  |        |
| IE      |         |         |         |                  |        |
|         |         |         |         |                  |        |
| \(b\)   |         |         |         |                  |        |
| Basic   |         |         |         |                  |        |
| All     |         |         |         |                  |        |
| ground  |         |         |         |                  |        |
| waters  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 3\.     |         |         |         |                  |        |
| Reverse |         |         |         |                  |        |
| Osmosis |         |         |         |                  |        |
| (RO)    |         |         |         |                  |        |
|         |         |         |         |                  |        |
| \(c\)   |         |         |         |                  |        |
| A       |         |         |         |                  |        |
| dvanced |         |         |         |                  |        |
| Surface |         |         |         |                  |        |
| waters  |         |         |         |                  |        |
| usually |         |         |         |                  |        |
| require |         |         |         |                  |        |
|         |         |         |         |                  |        |
| pre-fil |         |         |         |                  |        |
| tration |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 4\.     |         |         |         |                  |        |
| POU^2^  |         |         |         |                  |        |
| RO      |         |         |         |                  |        |
|         |         |         |         |                  |        |
| \(b\)   |         |         |         |                  |        |
| Basic   |         |         |         |                  |        |
| Surface |         |         |         |                  |        |
| waters  |         |         |         |                  |        |
| usually |         |         |         |                  |        |
| require |         |         |         |                  |        |
|         |         |         |         |                  |        |
| pre-fil |         |         |         |                  |        |
| tration |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Limi    |         |         |         | \' 141.66 (h)    |        |
| tations |         |         |         |                  |        |
| O       |         |         |         | Table C          |        |
| perator |         |         |         | continued        |        |
| Skill   |         |         |         |                  |        |
| Raw     |         |         |         |                  |        |
| Water   |         |         |         |                  |        |
| Quality |         |         |         |                  |        |
| Range   |         |         |         |                  |        |
|         |         |         |         |                  |        |
| (see    |         |         |         |                  |        |
| foo     |         |         |         |                  |        |
| tnotes) |         |         |         |                  |        |
| Level   |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Conside |         |         |         |                  |        |
| rations |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 5\.     |         |         |         |                  |        |
| Lime    |         |         |         |                  |        |
| So      |         |         |         |                  |        |
| ftening |         |         |         |                  |        |
|         |         |         |         |                  |        |
| \(d\)   |         |         |         |                  |        |
| A       |         |         |         |                  |        |
| dvanced |         |         |         |                  |        |
| All     |         |         |         |                  |        |
| waters  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 6\.     |         |         |         |                  |        |
| Green   |         |         |         |                  |        |
| Sand    |         |         |         |                  |        |
| Fil     |         |         |         |                  |        |
| tration |         |         |         |                  |        |
|         |         |         |         |                  |        |
| \(e\)   |         |         |         |                  |        |
| Basic   |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 7\.     |         |         |         |                  |        |
| Co      |         |         |         |                  |        |
| -precip |         |         |         |                  |        |
| itation |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| Barium  |         |         |         |                  |        |
| Sulfate |         |         |         |                  |        |
|         |         |         |         |                  |        |
| \(f\)   |         |         |         |                  |        |
| Inter   |         |         |         |                  |        |
| mediate |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| Ground  |         |         |         |                  |        |
| waters  |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| uitable |         |         |         |                  |        |
|         |         |         |         |                  |        |
| A       |         |         |         |                  |        |
| dvanced |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| quality |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 8\.     |         |         |         |                  |        |
| Ele     |         |         |         |                  |        |
| ctrodia |         |         |         |                  |        |
| lysis/E |         |         |         |                  |        |
| lectrod |         |         |         |                  |        |
| ialysis |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| eversal |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Basic   |         |         |         |                  |        |
| to All  |         |         |         |                  |        |
| ground  |         |         |         |                  |        |
| waters  |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Inter   |         |         |         |                  |        |
| mediate |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 9\.     |         |         |         |                  |        |
| Pre     |         |         |         |                  |        |
| -formed |         |         |         |                  |        |
| Hydrous |         |         |         |                  |        |
| Ma      |         |         |         |                  |        |
| nganese |         |         |         |                  |        |
| Oxide   |         |         |         |                  |        |
| Fil     |         |         |         |                  |        |
| tration |         |         |         |                  |        |
|         |         |         |         |                  |        |
| \(g\)   |         |         |         |                  |        |
| Inter   |         |         |         |                  |        |
| mediate |         |         |         |                  |        |
| All     |         |         |         |                  |        |
| ground  |         |         |         |                  |        |
| waters  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 10\.    |         |         |         |                  |        |
| Ac      |         |         |         |                  |        |
| tivated |         |         |         |                  |        |
| alumina |         |         |         |                  |        |
|         |         |         |         |                  |        |
| (a),    |         |         |         |                  |        |
| (h)     |         |         |         |                  |        |
| A       |         |         |         |                  |        |
| dvanced |         |         |         |                  |        |
| All     |         |         |         |                  |        |
| ground  |         |         |         |                  |        |
| waters, |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mpeting |         |         |         |                  |        |
|         |         |         |         |                  |        |
| anion   |         |         |         |                  |        |
| concent |         |         |         |                  |        |
| rations |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| affect  |         |         |         |                  |        |
|         |         |         |         |                  |        |
| regen   |         |         |         |                  |        |
| eration |         |         |         |                  |        |
| fr      |         |         |         |                  |        |
| equency |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 11\.    |         |         |         |                  |        |
| E       |         |         |         |                  |        |
| nhanced |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| oagulat |         |         |         |                  |        |
| ion/fil |         |         |         |                  |        |
| tration |         |         |         |                  |        |
|         |         |         |         |                  |        |
| \(i\)   |         |         |         |                  |        |
| A       |         |         |         |                  |        |
| dvanced |         |         |         |                  |        |
| Can     |         |         |         |                  |        |
| treat a |         |         |         |                  |        |
| wide    |         |         |         |                  |        |
| range   |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| qu      |         |         |         |                  |        |
| alities |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| See \'  |         |         |         | \' 141.66 (h)    |        |
| 141.66  |         |         |         |                  |        |
| (h)     |         |         |         | Table C,         |        |
| Table C |         |         |         | Footnotes        |        |
| for     |         |         |         |                  |        |
| foo     |         |         |         |                  |        |
| tnotes. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Com     |         |         |         | \' 141.66 (h)    |        |
| pliance |         |         |         |                  |        |
| Techn   |         |         |         | Table D          |        |
| ologies |         |         |         |                  |        |
| by      |         |         |         |                  |        |
| System  |         |         |         |                  |        |
| Size    |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| ategory |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| Radio   |         |         |         |                  |        |
| nuclide |         |         |         |                  |        |
| NPDWRs  |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 1\.     |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| ium-228 |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 25-500  | 50      | 3,300   |         |                  |        |
|         | 1-3,300 | -10,000 |         |                  |        |
| 1,2     |         |         |         |                  |        |
| ,3,4,5, | 1,2     | 1,2     |         |                  |        |
| 6,7,8,9 | ,3,4,5, | ,3,4,5, |         |                  |        |
|         | 6,7,8,9 | 6,7,8,9 |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 2\.     |         |         |         |                  |        |
| Gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 25-500  | 50      | 3,300   |         |                  |        |
|         | 1-3,300 | -10,000 |         |                  |        |
| 3,4     |         |         |         |                  |        |
|         | 3,4     | 3,4     |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 3\.     |         |         |         |                  |        |
| Beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| photon  |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 25-500  | 50      | 3,300   |         |                  |        |
|         | 1-3,300 | -10,000 |         |                  |        |
| 1,2,3,4 |         |         |         |                  |        |
|         | 1,2,3,4 | 1,2,3,4 |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 4\.     |         |         |         |                  |        |
| Uranium |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 25-500  | 50      | 3,300   |         |                  |        |
|         | 1-3,300 | -10,000 |         |                  |        |
| 1,2,    |         |         |         |                  |        |
| 4,10,11 | 1       | 1       |         |                  |        |
|         | ,2,3,4, | ,2,3,4, |         |                  |        |
|         | 5,10,11 | 5,10,11 |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Note:   |         |         |         | \' 141.66 (h)    |        |
| (1)     |         |         |         |                  |        |
| Numbers |         |         |         | Table D          |        |
| cor     |         |         |         |                  |        |
| respond |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| those   |         |         |         |                  |        |
| techn   |         |         |         |                  |        |
| ologies |         |         |         |                  |        |
| found   |         |         |         |                  |        |
| listed  |         |         |         |                  |        |
| in the  |         |         |         |                  |        |
| table C |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| 141     |         |         |         |                  |        |
| .66(h). |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **[     |         |         |         |                  |        |
| Subpart |         |         |         |                  |        |
| O -     |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| onsumer |         |         |         |                  |        |
| Con     |         |         |         |                  |        |
| fidence |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| eports] |         |         |         |                  |        |
| {.small |         |         |         |                  |        |
| caps}** |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **[A    |         |         |         |                  |        |
| ppendix |         |         |         |                  |        |
| A to    |         |         |         |                  |        |
| Subpart |         |         |         |                  |        |
| O of    |         |         |         |                  |        |
| Part    |         |         |         |                  |        |
| 141]    |         |         |         |                  |        |
| {.small |         |         |         |                  |        |
| caps}** |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Re      |         |         | A       |                  |        |
| gulated |         |         | ppendix |                  |        |
| Conta   |         |         | A to    |                  |        |
| minants |         |         | Subpart |                  |        |
| Table   |         |         | O       |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Beta    |         |         |         |                  |        |
| /photon |         |         |         |                  |        |
| e       |         |         |         |                  |        |
| mitters |         |         |         |                  |        |
| (m      |         |         |         |                  |        |
| rem/yr) |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCL in  |         |         |         |                  |        |
| mg/L: 4 |         |         |         |                  |        |
| mrem/yr |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCL in  |         |         |         |                  |        |
| CCR     |         |         |         |                  |        |
| units:  |         |         |         |                  |        |
| 4       |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCLG: 0 |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Major   |         |         |         |                  |        |
| sources |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| rinking |         |         |         |                  |        |
| water:  |         |         |         |                  |        |
| Decay   |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| natural |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| m       |         |         |         |                  |        |
| an-made |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| eposits |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Health  |         |         |         |                  |        |
| e       |         |         |         |                  |        |
| ffects: |         |         |         |                  |        |
| Certain |         |         |         |                  |        |
| m       |         |         |         |                  |        |
| inerals |         |         |         |                  |        |
| are     |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| oactive |         |         |         |                  |        |
| and may |         |         |         |                  |        |
| emit    |         |         |         |                  |        |
| forms   |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| ra      |         |         |         |                  |        |
| diation |         |         |         |                  |        |
| known   |         |         |         |                  |        |
| as      |         |         |         |                  |        |
| photons |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| iation. |         |         |         |                  |        |
| Some    |         |         |         |                  |        |
| people  |         |         |         |                  |        |
| who     |         |         |         |                  |        |
| drink   |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| con     |         |         |         |                  |        |
| taining |         |         |         |                  |        |
| beta    |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| photon  |         |         |         |                  |        |
| radioa  |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| excess  |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| MCL     |         |         |         |                  |        |
| over    |         |         |         |                  |        |
| many    |         |         |         |                  |        |
| years   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| have an |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| creased |         |         |         |                  |        |
| risk of |         |         |         |                  |        |
| getting |         |         |         |                  |        |
| cancer. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Alpha   |         |         |         |                  |        |
| e       |         |         |         |                  |        |
| mitters |         |         |         |                  |        |
| (pCi/L) |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCL in  |         |         |         |                  |        |
| mg/L:   |         |         |         |                  |        |
| 15      |         |         |         |                  |        |
| pCi/L   |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCL in  |         |         |         |                  |        |
| CCR     |         |         |         |                  |        |
| units:  |         |         |         |                  |        |
| 15      |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCLG: 0 |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Major   |         |         |         |                  |        |
| sources |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| rinking |         |         |         |                  |        |
| water:  |         |         |         |                  |        |
| Erosion |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| natural |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| eposits |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Health  |         |         |         |                  |        |
| e       |         |         |         |                  |        |
| ffects: |         |         |         |                  |        |
| Certain |         |         |         |                  |        |
| m       |         |         |         |                  |        |
| inerals |         |         |         |                  |        |
| are     |         |         |         |                  |        |
| radi    |         |         |         |                  |        |
| oactive |         |         |         |                  |        |
| and may |         |         |         |                  |        |
| emit a  |         |         |         |                  |        |
| form of |         |         |         |                  |        |
| ra      |         |         |         |                  |        |
| diation |         |         |         |                  |        |
| known   |         |         |         |                  |        |
| as      |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| rad     |         |         |         |                  |        |
| iation. |         |         |         |                  |        |
| Some    |         |         |         |                  |        |
| people  |         |         |         |                  |        |
| who     |         |         |         |                  |        |
| drink   |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| con     |         |         |         |                  |        |
| taining |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| e       |         |         |         |                  |        |
| mitters |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| excess  |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| MCL     |         |         |         |                  |        |
| over    |         |         |         |                  |        |
| many    |         |         |         |                  |        |
| years   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| have an |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| creased |         |         |         |                  |        |
| risk of |         |         |         |                  |        |
| getting |         |         |         |                  |        |
| cancer. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| C       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| radium  |         |         |         |                  |        |
| (pCi/L) |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCL in  |         |         |         |                  |        |
| mg/L: 5 |         |         |         |                  |        |
| pCi/L   |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCL in  |         |         |         |                  |        |
| CCR     |         |         |         |                  |        |
| units:  |         |         |         |                  |        |
| 5       |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCLG: 0 |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Major   |         |         |         |                  |        |
| sources |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| rinking |         |         |         |                  |        |
| water:  |         |         |         |                  |        |
| Erosion |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| natural |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| eposits |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Health  |         |         |         |                  |        |
| e       |         |         |         |                  |        |
| ffects: |         |         |         |                  |        |
| Some    |         |         |         |                  |        |
| people  |         |         |         |                  |        |
| who     |         |         |         |                  |        |
| drink   |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| con     |         |         |         |                  |        |
| taining |         |         |         |                  |        |
| radium  |         |         |         |                  |        |
| 226 or  |         |         |         |                  |        |
| 228 in  |         |         |         |                  |        |
| excess  |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| MCL     |         |         |         |                  |        |
| over    |         |         |         |                  |        |
| many    |         |         |         |                  |        |
| years   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| have an |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| creased |         |         |         |                  |        |
| risk of |         |         |         |                  |        |
| getting |         |         |         |                  |        |
| cancer. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Uranium |         |         |         |                  |        |
| (pCi/L) |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCL in  |         |         |         |                  |        |
| mg/L:   |         |         |         |                  |        |
| 30 g/L |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCL in  |         |         |         |                  |        |
| CCR     |         |         |         |                  |        |
| units:  |         |         |         |                  |        |
| 30      |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCLG: 0 |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Major   |         |         |         |                  |        |
| sources |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| rinking |         |         |         |                  |        |
| water:  |         |         |         |                  |        |
| Erosion |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| natural |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| eposits |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Health  |         |         |         |                  |        |
| e       |         |         |         |                  |        |
| ffects: |         |         |         |                  |        |
| Some    |         |         |         |                  |        |
| people  |         |         |         |                  |        |
| who     |         |         |         |                  |        |
| drink   |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| con     |         |         |         |                  |        |
| taining |         |         |         |                  |        |
| uranium |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| excess  |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| MCL     |         |         |         |                  |        |
| over    |         |         |         |                  |        |
| many    |         |         |         |                  |        |
| years   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| have an |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| creased |         |         |         |                  |        |
| risk of |         |         |         |                  |        |
| getting |         |         |         |                  |        |
| cancer  |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| kidney  |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| xicity. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **[     |         |         |         |                  |        |
| Subpart |         |         |         |                  |        |
| Q -     |         |         |         |                  |        |
| Public  |         |         |         |                  |        |
| Notif   |         |         |         |                  |        |
| ication |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| rinking |         |         |         |                  |        |
| Water   |         |         |         |                  |        |
| Viol    |         |         |         |                  |        |
| ations] |         |         |         |                  |        |
| {.small |         |         |         |                  |        |
| caps}** |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **[A    |         |         |         |                  |        |
| ppendix |         |         |         |                  |        |
| A to    |         |         |         |                  |        |
| Subpart |         |         |         |                  |        |
| Q of    |         |         |         |                  |        |
| Part    |         |         |         |                  |        |
| 141 -   |         |         |         |                  |        |
| NPDWR   |         |         |         |                  |        |
| Vio     |         |         |         |                  |        |
| lations |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Other   |         |         |         |                  |        |
| Sit     |         |         |         |                  |        |
| uations |         |         |         |                  |        |
| Re      |         |         |         |                  |        |
| quiring |         |         |         |                  |        |
| Public  |         |         |         |                  |        |
| Not     |         |         |         |                  |        |
| ice^1^] |         |         |         |                  |        |
| {.small |         |         |         |                  |        |
| caps}** |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| I.      |         |         | I       |                  |        |
| Vio     |         |         |         |                  |        |
| lations |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| N       |         |         |         |                  |        |
| ational |         |         |         |                  |        |
| Primary |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| rinking |         |         |         |                  |        |
| Water   |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| egulati |         |         |         |                  |        |
| ons(NPD |         |         |         |                  |        |
| WR)^3^: |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 1\.     |         |         | I.F.1.  |                  |        |
| Beta    |         |         |         |                  |        |
| /photon |         |         |         |                  |        |
| em      |         |         |         |                  |        |
| itters: |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCL/    |         |         |         |                  |        |
| MRDL/TT |         |         |         |                  |        |
| violat  |         |         |         |                  |        |
| ions^2^ |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Tier of |         |         |         |                  |        |
| Public  |         |         |         |                  |        |
| Notice  |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| itation |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 2       |         |         |         |                  |        |
| 141.66  |         |         |         |                  |        |
| (d)     |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| testing |         |         |         |                  |        |
| pr      |         |         |         |                  |        |
| ocedure |         |         |         |                  |        |
| vio     |         |         |         |                  |        |
| lations |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Tier of |         |         |         |                  |        |
| Public  |         |         |         |                  |        |
| Notice  |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| itation |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 3       |         |         |         |                  |        |
| 141.25  |         |         |         |                  |        |
| (a),    |         |         |         |                  |        |
| 141.26  |         |         |         |                  |        |
| (b)     |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 2\.     |         |         | I.F.2.  |                  |        |
| Alpha   |         |         |         |                  |        |
| em      |         |         |         |                  |        |
| itters: |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCL/    |         |         |         |                  |        |
| MRDL/TT |         |         |         |                  |        |
| violat  |         |         |         |                  |        |
| ions^2^ |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Tier of |         |         |         |                  |        |
| Public  |         |         |         |                  |        |
| Notice  |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| itation |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 2       |         |         |         |                  |        |
| 141.66  |         |         |         |                  |        |
| (c)     |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| testing |         |         |         |                  |        |
| pr      |         |         |         |                  |        |
| ocedure |         |         |         |                  |        |
| vio     |         |         |         |                  |        |
| lations |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Tier of |         |         |         |                  |        |
| Public  |         |         |         |                  |        |
| Notice  |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| itation |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 3       |         |         |         |                  |        |
| 141.25  |         |         |         |                  |        |
| (a),    |         |         |         |                  |        |
| 141.26  |         |         |         |                  |        |
| (a)     |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 3\.     |         |         | I.F.3.  |                  |        |
| C       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| radium  |         |         |         |                  |        |
| (226 &  |         |         |         |                  |        |
| 228):   |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCL/    |         |         |         |                  |        |
| MRDL/TT |         |         |         |                  |        |
| violat  |         |         |         |                  |        |
| ions^2^ |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Tier of |         |         |         |                  |        |
| Public  |         |         |         |                  |        |
| Notice  |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| itation |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 2       |         |         |         |                  |        |
| 141.66  |         |         |         |                  |        |
| (b)     |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| testing |         |         |         |                  |        |
| pr      |         |         |         |                  |        |
| ocedure |         |         |         |                  |        |
| vio     |         |         |         |                  |        |
| lations |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Tier of |         |         |         |                  |        |
| Public  |         |         |         |                  |        |
| Notice  |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| itation |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 3       |         |         |         |                  |        |
| 141.25  |         |         |         |                  |        |
| (a),    |         |         |         |                  |        |
| 141.26  |         |         |         |                  |        |
| (a)     |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 4\.     |         |         | I.F.4.  |                  |        |
| U       |         |         |         |                  |        |
| ranium: |         |         |         |                  |        |
|         |         |         |         |                  |        |
| MCL/    |         |         |         |                  |        |
| MRDL/TT |         |         |         |                  |        |
| violat  |         |         |         |                  |        |
| ions^2^ |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Tier of |         |         |         |                  |        |
| Public  |         |         |         |                  |        |
| Notice  |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| itation |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 2^9^    |         |         |         |                  |        |
| 141.66  |         |         |         |                  |        |
| (e)     |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Mon     |         |         |         |                  |        |
| itoring |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| testing |         |         |         |                  |        |
| pr      |         |         |         |                  |        |
| ocedure |         |         |         |                  |        |
| vio     |         |         |         |                  |        |
| lations |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Tier of |         |         |         |                  |        |
| Public  |         |         |         |                  |        |
| Notice  |         |         |         |                  |        |
| R       |         |         |         |                  |        |
| equired |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| itation |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 3^10^   |         |         |         |                  |        |
| 141.25  |         |         |         |                  |        |
| (a),    |         |         |         |                  |        |
| 141.26  |         |         |         |                  |        |
| (a)     |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 1\.     |         |         | A       |                  |        |
| Vio     |         |         | ppendix |                  |        |
| lations |         |         | A,      |                  |        |
| and     |         |         | E       |                  |        |
| other   |         |         | ndnotes |                  |        |
| sit     |         |         |         |                  |        |
| uations |         |         |         |                  |        |
| not     |         |         |         |                  |        |
| listed  |         |         |         |                  |        |
| in this |         |         |         |                  |        |
| table   |         |         |         |                  |        |
| (e.g.,  |         |         |         |                  |        |
| re      |         |         |         |                  |        |
| porting |         |         |         |                  |        |
| vio     |         |         |         |                  |        |
| lations |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| failure |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| prepare |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| onsumer |         |         |         |                  |        |
| Con     |         |         |         |                  |        |
| fidence |         |         |         |                  |        |
| Re      |         |         |         |                  |        |
| ports), |         |         |         |                  |        |
| do not  |         |         |         |                  |        |
| require |         |         |         |                  |        |
| notice, |         |         |         |                  |        |
| unless  |         |         |         |                  |        |
| ot      |         |         |         |                  |        |
| herwise |         |         |         |                  |        |
| det     |         |         |         |                  |        |
| ermined |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| primary |         |         |         |                  |        |
| agency. |         |         |         |                  |        |
| Primacy |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| gencies |         |         |         |                  |        |
| may, at |         |         |         |                  |        |
| their   |         |         |         |                  |        |
| option, |         |         |         |                  |        |
| also    |         |         |         |                  |        |
| require |         |         |         |                  |        |
| a more  |         |         |         |                  |        |
| st      |         |         |         |                  |        |
| ringent |         |         |         |                  |        |
| public  |         |         |         |                  |        |
| notice  |         |         |         |                  |        |
| tier    |         |         |         |                  |        |
| (e.g.,  |         |         |         |                  |        |
| Tier 1  |         |         |         |                  |        |
| instead |         |         |         |                  |        |
| of Tier |         |         |         |                  |        |
| 2 or    |         |         |         |                  |        |
| Tier 2  |         |         |         |                  |        |
| instead |         |         |         |                  |        |
| of Tier |         |         |         |                  |        |
| 3) for  |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| pecific |         |         |         |                  |        |
| vio     |         |         |         |                  |        |
| lations |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| sit     |         |         |         |                  |        |
| uations |         |         |         |                  |        |
| listed  |         |         |         |                  |        |
| in this |         |         |         |                  |        |
| Ap      |         |         |         |                  |        |
| pendix, |         |         |         |                  |        |
| as      |         |         |         |                  |        |
| aut     |         |         |         |                  |        |
| horized |         |         |         |                  |        |
| under   |         |         |         |                  |        |
| Sec.    |         |         |         |                  |        |
| 141     |         |         |         |                  |        |
| .202(a) |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Sec.    |         |         |         |                  |        |
| 141.    |         |         |         |                  |        |
| 203(a). |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 2\.     |         |         |         |                  |        |
| MCL‑‑   |         |         |         |                  |        |
| Maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| level,  |         |         |         |                  |        |
| MRDL‑‑  |         |         |         |                  |        |
| Maximum |         |         |         |                  |        |
| r       |         |         |         |                  |        |
| esidual |         |         |         |                  |        |
| disin   |         |         |         |                  |        |
| fectant |         |         |         |                  |        |
| level,  |         |         |         |                  |        |
| TT‑‑Tr  |         |         |         |                  |        |
| eatment |         |         |         |                  |        |
| te      |         |         |         |                  |        |
| chnique |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 3\. The |         |         | A       |                  |        |
| term    |         |         | ppendix |                  |        |
| Vio     |         |         | A,      |                  |        |
| lations |         |         | E       |                  |        |
| of      |         |         | ndnotes |                  |        |
| N       |         |         |         |                  |        |
| ational |         |         |         |                  |        |
| Primary |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| rinking |         |         |         |                  |        |
| Water   |         |         |         |                  |        |
| Regu    |         |         |         |                  |        |
| lations |         |         |         |                  |        |
| (NPDWR) |         |         |         |                  |        |
| is used |         |         |         |                  |        |
| here to |         |         |         |                  |        |
| include |         |         |         |                  |        |
| vio     |         |         |         |                  |        |
| lations |         |         |         |                  |        |
| of MCL, |         |         |         |                  |        |
| MRDL,   |         |         |         |                  |        |
| tr      |         |         |         |                  |        |
| eatment |         |         |         |                  |        |
| tec     |         |         |         |                  |        |
| hnique, |         |         |         |                  |        |
| moni    |         |         |         |                  |        |
| toring, |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| testing |         |         |         |                  |        |
| pr      |         |         |         |                  |        |
| ocedure |         |         |         |                  |        |
| requir  |         |         |         |                  |        |
| ements. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 9\. The |         |         | A       |                  |        |
| uranium |         |         | ppendix |                  |        |
| MCL     |         |         | A,      |                  |        |
| Tier 2  |         |         | E       |                  |        |
| vi      |         |         | ndnotes |                  |        |
| olation |         |         |         |                  |        |
| ci      |         |         |         |                  |        |
| tations |         |         |         |                  |        |
| are     |         |         |         |                  |        |
| ef      |         |         |         |                  |        |
| fective |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| ecember |         |         |         |                  |        |
| 8, 2003 |         |         |         |                  |        |
| for all |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mmunity |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ystems. |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 10\.    |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| uranium |         |         |         |                  |        |
| Tier 3  |         |         |         |                  |        |
| vi      |         |         |         |                  |        |
| olation |         |         |         |                  |        |
| ci      |         |         |         |                  |        |
| tations |         |         |         |                  |        |
| are     |         |         |         |                  |        |
| ef      |         |         |         |                  |        |
| fective |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| ecember |         |         |         |                  |        |
| 8, 2003 |         |         |         |                  |        |
| for all |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mmunity |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ystems. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **[A    |         |         |         |                  |        |
| ppendix |         |         |         |                  |        |
| B to    |         |         |         |                  |        |
| Subpart |         |         |         |                  |        |
| Q of    |         |         |         |                  |        |
| Part    |         |         |         |                  |        |
| 141 -   |         |         |         |                  |        |
| S       |         |         |         |                  |        |
| tandard |         |         |         |                  |        |
| Health  |         |         |         |                  |        |
| Effects |         |         |         |                  |        |
| L       |         |         |         |                  |        |
| anguage |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| Public  |         |         |         |                  |        |
| Notifi  |         |         |         |                  |        |
| cation] |         |         |         |                  |        |
| {.small |         |         |         |                  |        |
| caps}** |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| B.      |         |         | G.79.   |                  |        |
| S       |         |         |         |                  |        |
| tandard |         |         |         |                  |        |
| Health  |         |         |         |                  |        |
| Effects |         |         |         |                  |        |
| L       |         |         |         |                  |        |
| anguage |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| Surface |         |         |         |                  |        |
| Water   |         |         |         |                  |        |
| Tr      |         |         |         |                  |        |
| eatment |         |         |         |                  |        |
| Rule    |         |         |         |                  |        |
| (SWTR), |         |         |         |                  |        |
| Interim |         |         |         |                  |        |
| E       |         |         |         |                  |        |
| nhanced |         |         |         |                  |        |
| Surface |         |         |         |                  |        |
| Water   |         |         |         |                  |        |
| Tr      |         |         |         |                  |        |
| eatment |         |         |         |                  |        |
| Rule    |         |         |         |                  |        |
| (       |         |         |         |                  |        |
| IESWTR) |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Filter  |         |         |         |                  |        |
| B       |         |         |         |                  |        |
| ackwash |         |         |         |                  |        |
| Re      |         |         |         |                  |        |
| cycling |         |         |         |                  |        |
| Rule    |         |         |         |                  |        |
| (FBRR)  |         |         |         |                  |        |
| viol    |         |         |         |                  |        |
| ations: |         |         |         |                  |        |
|         |         |         |         |                  |        |
| Cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| MCLG^1^ |         |         |         |                  |        |
| MCL^2^  |         |         |         |                  |        |
| S       |         |         |         |                  |        |
| tandard |         |         |         |                  |        |
| Health  |         |         |         |                  |        |
| Effects |         |         |         |                  |        |
|         |         |         |         |                  |        |
| mg/L    |         |         |         |                  |        |
| mg/L    |         |         |         |                  |        |
| L       |         |         |         |                  |        |
| anguage |         |         |         |                  |        |
| for PN  |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 79\.    |         |         |         |                  |        |
| Uran    |         |         |         |                  |        |
| ium^16^ |         |         |         |                  |        |
| Zero 30 |         |         |         |                  |        |
| g/L    |         |         |         |                  |        |
| Some    |         |         |         |                  |        |
| people  |         |         |         |                  |        |
| who     |         |         |         |                  |        |
| drink   |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| con     |         |         |         |                  |        |
| taining |         |         |         |                  |        |
| uranium |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| excess  |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| MCL     |         |         |         |                  |        |
| over    |         |         |         |                  |        |
| many    |         |         |         |                  |        |
| years   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| have an |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| creased |         |         |         |                  |        |
| risk of |         |         |         |                  |        |
| getting |         |         |         |                  |        |
| cancer  |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| kidney  |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| xicity. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| 1\.     |         |         | A       |                  |        |
| MCLG-   |         |         | ppendix |                  |        |
| Maximum |         |         | B       |                  |        |
| cont    |         |         | E       |                  |        |
| aminant |         |         | ndnotes |                  |        |
| level   |         |         |         |                  |        |
| goal    |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 2\.     |         |         |         |                  |        |
| MCL-    |         |         |         |                  |        |
| Maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| level   |         |         |         |                  |        |
|         |         |         |         |                  |        |
| 16\.    |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| uranium |         |         |         |                  |        |
| MCL is  |         |         |         |                  |        |
| ef      |         |         |         |                  |        |
| fective |         |         |         |                  |        |
| D       |         |         |         |                  |        |
| ecember |         |         |         |                  |        |
| 8, 2003 |         |         |         |                  |        |
| for all |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mmunity |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ystems. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **[Part |         |         |         |                  |        |
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| ational |         |         |         |                  |        |
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| rinking |         |         |         |                  |        |
| Water   |         |         |         |                  |        |
| Regu    |         |         |         |                  |        |
| lations |         |         |         |                  |        |
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| mplemen |         |         |         |                  |        |
| tation] |         |         |         |                  |        |
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| **[     |         |         |         |                  |        |
| Subpart |         |         |         |                  |        |
| B -     |         |         |         |                  |        |
| Primary |         |         |         |                  |        |
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| R       |         |         |         |                  |        |
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+---------+---------+---------+---------+------------------+--------+
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| 142.16  |         |         |         |                  |        |
| [       |         |         |         |                  |        |
| Special |         |         |         |                  |        |
| primacy |         |         |         |                  |        |
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+---------+---------+---------+---------+------------------+--------+
| \[res   |         |         | \'      |                  |        |
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|         |         |         | (i)     |                  |        |
+---------+---------+---------+---------+------------------+--------+
| \[res   |         |         | \'      |                  |        |
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|         |         |         | (j)     |                  |        |
+---------+---------+---------+---------+------------------+--------+
| \[res   |         |         | \'      |                  |        |
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|         |         |         | (k)     |                  |        |
+---------+---------+---------+---------+------------------+--------+
| An      |         |         | \'      |                  |        |
| appl    |         |         | 142.16  |                  |        |
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| 141.2   |         |         |         |                  |        |
| 6(a)(2) |         |         |         |                  |        |
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| in this |         |         |         |                  |        |
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+---------+---------+---------+---------+------------------+--------+
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| in \'   |         |         |         |                  |        |
| 141.2   |         |         |         |                  |        |
| 6(a)(2) |         |         |         |                  |        |
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+---------+---------+---------+---------+------------------+--------+
| The     |         |         | \'      |                  |        |
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| nsider: |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| All     |         |         | \'      |                  |        |
| p       |         |         | 142.16  |                  |        |
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| data.   |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| The     |         |         | \'      |                  |        |
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| levels. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Other   |         |         | \'      |                  |        |
| factors |         |         | 142.16  |                  |        |
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+---------+---------+---------+---------+------------------+--------+
| A       |         |         | \'      |                  |        |
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| ulatory |         |         |         |                  |        |
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| States  |         |         |         |                  |        |
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| 6(e)(5) |         |         |         |                  |        |
| under   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
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| The     |         |         |         |                  |        |
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| must    |         |         |         |                  |        |
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| under   |         |         |         |                  |        |
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| law.    |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| **\'    |         |         |         |                  |        |
| [142.65 |         |         |         |                  |        |
| Va      |         |         |         |                  |        |
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| aminant |         |         |         |                  |        |
| levels  |         |         |         |                  |        |
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| ]       |         |         |         |                  |        |
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|         |         |         |         |                  |        |
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+---------+---------+---------+---------+------------------+--------+
| Va      |         |         | \'      |                  |        |
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| and     |         |         | 5(a)(1) |                  |        |
| exe     |         |         |         |                  |        |
| mptions |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| levels  |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| C       |         |         |         |                  |        |
| ombined |         |         |         |                  |        |
| Rad     |         |         |         |                  |        |
| ium-226 |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Radi    |         |         |         |                  |        |
| um-228, |         |         |         |                  |        |
| U       |         |         |         |                  |        |
| ranium, |         |         |         |                  |        |
| Gross   |         |         |         |                  |        |
| alpha   |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| ctivity |         |         |         |                  |        |
| (Ex     |         |         |         |                  |        |
| cluding |         |         |         |                  |        |
| Radon   |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Ur      |         |         |         |                  |        |
| anium), |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Beta    |         |         |         |                  |        |
| P       |         |         |         |                  |        |
| article |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| Photon  |         |         |         |                  |        |
| Radioac |         |         |         |                  |        |
| tivity. |         |         |         |                  |        |
|         |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| Adminis |         |         |         |                  |        |
| trator, |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| ursuant |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| section |         |         |         |                  |        |
| 1415(a  |         |         |         |                  |        |
| )(1)(A) |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| Act,    |         |         |         |                  |        |
| hereby  |         |         |         |                  |        |
| ide     |         |         |         |                  |        |
| ntifies |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| fo      |         |         |         |                  |        |
| llowing |         |         |         |                  |        |
| as the  |         |         |         |                  |        |
| best    |         |         |         |                  |        |
| av      |         |         |         |                  |        |
| ailable |         |         |         |                  |        |
| tech    |         |         |         |                  |        |
| nology, |         |         |         |                  |        |
| tr      |         |         |         |                  |        |
| eatment |         |         |         |                  |        |
| tech    |         |         |         |                  |        |
| niques, |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| other   |         |         |         |                  |        |
| means   |         |         |         |                  |        |
| av      |         |         |         |                  |        |
| ailable |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| ac      |         |         |         |                  |        |
| hieving |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| levels  |         |         |         |                  |        |
| for the |         |         |         |                  |        |
| radion  |         |         |         |                  |        |
| uclides |         |         |         |                  |        |
| listed  |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| \       |         |         |         |                  |        |
| '141.66 |         |         |         |                  |        |
| (b),    |         |         |         |                  |        |
| (c),    |         |         |         |                  |        |
| (d),    |         |         |         |                  |        |
| and (e) |         |         |         |                  |        |
| of this |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| hapter, |         |         |         |                  |        |
| for the |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| urposes |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| issuing |         |         |         |                  |        |
| va      |         |         |         |                  |        |
| riances |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| exem    |         |         |         |                  |        |
| ptions, |         |         |         |                  |        |
| as      |         |         |         |                  |        |
| shown   |         |         |         |                  |        |
| in \'   |         |         |         |                  |        |
| 141.66  |         |         |         |                  |        |
| (g)     |         |         |         |                  |        |
| Table   |         |         |         |                  |        |
| B.      |         |         |         |                  |        |
|         |         |         |         |                  |        |
| In      |         |         |         |                  |        |
| ad      |         |         |         |                  |        |
| dition, |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| Admini  |         |         |         |                  |        |
| strator |         |         |         |                  |        |
| hereby  |         |         |         |                  |        |
| ide     |         |         |         |                  |        |
| ntifies |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| fo      |         |         |         |                  |        |
| llowing |         |         |         |                  |        |
| as the  |         |         |         |                  |        |
| best    |         |         |         |                  |        |
| av      |         |         |         |                  |        |
| ailable |         |         |         |                  |        |
| tech    |         |         |         |                  |        |
| nology, |         |         |         |                  |        |
| tr      |         |         |         |                  |        |
| eatment |         |         |         |                  |        |
| tech    |         |         |         |                  |        |
| niques, |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| other   |         |         |         |                  |        |
| means   |         |         |         |                  |        |
| av      |         |         |         |                  |        |
| ailable |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| ac      |         |         |         |                  |        |
| hieving |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| with    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| maximum |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| levels  |         |         |         |                  |        |
| for the |         |         |         |                  |        |
| radion  |         |         |         |                  |        |
| uclides |         |         |         |                  |        |
| listed  |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| \       |         |         |         |                  |        |
| '141.66 |         |         |         |                  |        |
| (b),    |         |         |         |                  |        |
| (c),    |         |         |         |                  |        |
| (d),    |         |         |         |                  |        |
| and (e) |         |         |         |                  |        |
| of this |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| hapter, |         |         |         |                  |        |
| for the |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| urposes |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| issuing |         |         |         |                  |        |
| va      |         |         |         |                  |        |
| riances |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| exe     |         |         |         |                  |        |
| mptions |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| small   |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| rinking |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ystems, |         |         |         |                  |        |
| defined |         |         |         |                  |        |
| here as |         |         |         |                  |        |
| those   |         |         |         |                  |        |
| serving |         |         |         |                  |        |
| 10,000  |         |         |         |                  |        |
| persons |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| fewer,  |         |         |         |                  |        |
| as      |         |         |         |                  |        |
| shown   |         |         |         |                  |        |
| in \'   |         |         |         |                  |        |
| 141.66  |         |         |         |                  |        |
| (h)     |         |         |         |                  |        |
| Table   |         |         |         |                  |        |
| D.      |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| A State |         |         | \'      |                  |        |
| shall   |         |         | 142.6   |                  |        |
| require |         |         | 5(a)(2) |                  |        |
| co      |         |         |         |                  |        |
| mmunity |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| systems |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| install |         |         |         |                  |        |
| and/or  |         |         |         |                  |        |
| use any |         |         |         |                  |        |
| tr      |         |         |         |                  |        |
| eatment |         |         |         |                  |        |
| tec     |         |         |         |                  |        |
| hnology |         |         |         |                  |        |
| ide     |         |         |         |                  |        |
| ntified |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| Table A |         |         |         |                  |        |
| of this |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ection, |         |         |         |                  |        |
| pa      |         |         |         |                  |        |
| ragraph |         |         |         |                  |        |
| (1), or |         |         |         |                  |        |
| in the  |         |         |         |                  |        |
| case of |         |         |         |                  |        |
| small   |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| systems |         |         |         |                  |        |
| (those  |         |         |         |                  |        |
| serving |         |         |         |                  |        |
| 10,000  |         |         |         |                  |        |
| persons |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| fewer), |         |         |         |                  |        |
| \'      |         |         |         |                  |        |
| 141.66  |         |         |         |                  |        |
| (h)     |         |         |         |                  |        |
| Tables  |         |         |         |                  |        |
| C and   |         |         |         |                  |        |
| D, as a |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| ndition |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| g       |         |         |         |                  |        |
| ranting |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| v       |         |         |         |                  |        |
| ariance |         |         |         |                  |        |
| except  |         |         |         |                  |        |
| as      |         |         |         |                  |        |
| p       |         |         |         |                  |        |
| rovided |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| pa      |         |         |         |                  |        |
| ragraph |         |         |         |                  |        |
| (a)(3)  |         |         |         |                  |        |
| of this |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ection. |         |         |         |                  |        |
| If,     |         |         |         |                  |        |
| after   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| ystem=s |         |         |         |                  |        |
| insta   |         |         |         |                  |        |
| llation |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| tr      |         |         |         |                  |        |
| eatment |         |         |         |                  |        |
| tech    |         |         |         |                  |        |
| nology, |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| cannot  |         |         |         |                  |        |
| meet    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| MCL,    |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| be      |         |         |         |                  |        |
| e       |         |         |         |                  |        |
| ligible |         |         |         |                  |        |
| for a   |         |         |         |                  |        |
| v       |         |         |         |                  |        |
| ariance |         |         |         |                  |        |
| under   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| pro     |         |         |         |                  |        |
| visions |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| section |         |         |         |                  |        |
| 1415(a  |         |         |         |                  |        |
| )(1)(A) |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| Act.    |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| If a    |         |         | \'      |                  |        |
| co      |         |         | 142.6   |                  |        |
| mmunity |         |         | 5(a)(3) |                  |        |
| water   |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| can     |         |         |         |                  |        |
| demo    |         |         |         |                  |        |
| nstrate |         |         |         |                  |        |
| through |         |         |         |                  |        |
| compre  |         |         |         |                  |        |
| hensive |         |         |         |                  |        |
| engi    |         |         |         |                  |        |
| neering |         |         |         |                  |        |
| asses   |         |         |         |                  |        |
| sments, |         |         |         |                  |        |
| which   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| include |         |         |         |                  |        |
| pilot   |         |         |         |                  |        |
| plant   |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| tudies, |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| tr      |         |         |         |                  |        |
| eatment |         |         |         |                  |        |
| techn   |         |         |         |                  |        |
| ologies |         |         |         |                  |        |
| ide     |         |         |         |                  |        |
| ntified |         |         |         |                  |        |
| in this |         |         |         |                  |        |
| section |         |         |         |                  |        |
| would   |         |         |         |                  |        |
| only    |         |         |         |                  |        |
| achieve |         |         |         |                  |        |
| a *de   |         |         |         |                  |        |
| m       |         |         |         |                  |        |
| inimus* |         |         |         |                  |        |
| re      |         |         |         |                  |        |
| duction |         |         |         |                  |        |
| in the  |         |         |         |                  |        |
| cont    |         |         |         |                  |        |
| aminant |         |         |         |                  |        |
| level,  |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| issue a |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| chedule |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| r       |         |         |         |                  |        |
| equires |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| being   |         |         |         |                  |        |
| granted |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| v       |         |         |         |                  |        |
| ariance |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| examine |         |         |         |                  |        |
| other   |         |         |         |                  |        |
| tr      |         |         |         |                  |        |
| eatment |         |         |         |                  |        |
| techn   |         |         |         |                  |        |
| ologies |         |         |         |                  |        |
| as a    |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| ndition |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| ob      |         |         |         |                  |        |
| taining |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| va      |         |         |         |                  |        |
| riance. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| If the  |         |         | \'      |                  |        |
| State   |         |         | 142.6   |                  |        |
| det     |         |         | 5(a)(4) |                  |        |
| ermines |         |         |         |                  |        |
| that a  |         |         |         |                  |        |
| tr      |         |         |         |                  |        |
| eatment |         |         |         |                  |        |
| tec     |         |         |         |                  |        |
| hnology |         |         |         |                  |        |
| ide     |         |         |         |                  |        |
| ntified |         |         |         |                  |        |
| under   |         |         |         |                  |        |
| pa      |         |         |         |                  |        |
| ragraph |         |         |         |                  |        |
| (a)(3)  |         |         |         |                  |        |
| of this |         |         |         |                  |        |
| section |         |         |         |                  |        |
| is      |         |         |         |                  |        |
| tech    |         |         |         |                  |        |
| nically |         |         |         |                  |        |
| fe      |         |         |         |                  |        |
| asible, |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| Admini  |         |         |         |                  |        |
| strator |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| primacy |         |         |         |                  |        |
| State   |         |         |         |                  |        |
| may     |         |         |         |                  |        |
| require |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| install |         |         |         |                  |        |
| and/or  |         |         |         |                  |        |
| use     |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| tr      |         |         |         |                  |        |
| eatment |         |         |         |                  |        |
| tec     |         |         |         |                  |        |
| hnology |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| con     |         |         |         |                  |        |
| nection |         |         |         |                  |        |
| with a  |         |         |         |                  |        |
| com     |         |         |         |                  |        |
| pliance |         |         |         |                  |        |
| s       |         |         |         |                  |        |
| chedule |         |         |         |                  |        |
| issued  |         |         |         |                  |        |
| under   |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| pro     |         |         |         |                  |        |
| visions |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| section |         |         |         |                  |        |
| 1415(a  |         |         |         |                  |        |
| )(1)(A) |         |         |         |                  |        |
| of the  |         |         |         |                  |        |
| Act.    |         |         |         |                  |        |
| The     |         |         |         |                  |        |
| State=s |         |         |         |                  |        |
| determ  |         |         |         |                  |        |
| ination |         |         |         |                  |        |
| shall   |         |         |         |                  |        |
| be      |         |         |         |                  |        |
| based   |         |         |         |                  |        |
| upon    |         |         |         |                  |        |
| studies |         |         |         |                  |        |
| by the  |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| other   |         |         |         |                  |        |
| r       |         |         |         |                  |        |
| elevant |         |         |         |                  |        |
| infor   |         |         |         |                  |        |
| mation. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| The     |         |         | \'      |                  |        |
| State   |         |         | 142.6   |                  |        |
| may     |         |         | 5(a)(5) |                  |        |
| require |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| mmunity |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| system  |         |         |         |                  |        |
| to use  |         |         |         |                  |        |
| bottled |         |         |         |                  |        |
| water,  |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| -of-use |         |         |         |                  |        |
| d       |         |         |         |                  |        |
| evices, |         |         |         |                  |        |
| point-o |         |         |         |                  |        |
| f-entry |         |         |         |                  |        |
| devices |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| other   |         |         |         |                  |        |
| means   |         |         |         |                  |        |
| as a    |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| ndition |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| g       |         |         |         |                  |        |
| ranting |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| v       |         |         |         |                  |        |
| ariance |         |         |         |                  |        |
| or an   |         |         |         |                  |        |
| ex      |         |         |         |                  |        |
| emption |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| requi   |         |         |         |                  |        |
| rements |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| \       |         |         |         |                  |        |
| '141.66 |         |         |         |                  |        |
| of this |         |         |         |                  |        |
| c       |         |         |         |                  |        |
| hapter, |         |         |         |                  |        |
| to      |         |         |         |                  |        |
| avoid   |         |         |         |                  |        |
| an      |         |         |         |                  |        |
| unrea   |         |         |         |                  |        |
| sonable |         |         |         |                  |        |
| risk to |         |         |         |                  |        |
| health. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Co      |         |         | \'      |                  |        |
| mmunity |         |         | 142.6   |                  |        |
| water   |         |         | 5(a)(6) |                  |        |
| systems |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| use     |         |         |         |                  |        |
| bottled |         |         |         |                  |        |
| water   |         |         |         |                  |        |
| as a    |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| ndition |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| re      |         |         |         |                  |        |
| ceiving |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| v       |         |         |         |                  |        |
| ariance |         |         |         |                  |        |
| or an   |         |         |         |                  |        |
| ex      |         |         |         |                  |        |
| emption |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| requi   |         |         |         |                  |        |
| rements |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| \       |         |         |         |                  |        |
| '141.66 |         |         |         |                  |        |
| of this |         |         |         |                  |        |
| chapter |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| meet    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| requi   |         |         |         |                  |        |
| rements |         |         |         |                  |        |
| sp      |         |         |         |                  |        |
| ecified |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| either  |         |         |         |                  |        |
| pa      |         |         |         |                  |        |
| ragraph |         |         |         |                  |        |
| (g)(1)  |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| (g)(2)  |         |         |         |                  |        |
| and     |         |         |         |                  |        |
| (g)(3)  |         |         |         |                  |        |
| of      |         |         |         |                  |        |
| \'      |         |         |         |                  |        |
| 142.62. |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+
| Co      |         |         | \'      |                  |        |
| mmunity |         |         | 142.6   |                  |        |
| water   |         |         | 5(a)(7) |                  |        |
| systems |         |         |         |                  |        |
| that    |         |         |         |                  |        |
| use     |         |         |         |                  |        |
| point   |         |         |         |                  |        |
| -of-use |         |         |         |                  |        |
| or      |         |         |         |                  |        |
| point-o |         |         |         |                  |        |
| f-entry |         |         |         |                  |        |
| devices |         |         |         |                  |        |
| as a    |         |         |         |                  |        |
| co      |         |         |         |                  |        |
| ndition |         |         |         |                  |        |
| for     |         |         |         |                  |        |
| ob      |         |         |         |                  |        |
| taining |         |         |         |                  |        |
| a       |         |         |         |                  |        |
| v       |         |         |         |                  |        |
| ariance |         |         |         |                  |        |
| or an   |         |         |         |                  |        |
| ex      |         |         |         |                  |        |
| emption |         |         |         |                  |        |
| from    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| radion  |         |         |         |                  |        |
| uclides |         |         |         |                  |        |
| NPDWRs  |         |         |         |                  |        |
| must    |         |         |         |                  |        |
| meet    |         |         |         |                  |        |
| the     |         |         |         |                  |        |
| con     |         |         |         |                  |        |
| ditions |         |         |         |                  |        |
| in      |         |         |         |                  |        |
| \       |         |         |         |                  |        |
| '142.62 |         |         |         |                  |        |
| (h)(1)  |         |         |         |                  |        |
| through |         |         |         |                  |        |
| (h)(6). |         |         |         |                  |        |
+---------+---------+---------+---------+------------------+--------+