# Presentation: 681636

## An Overview of  the Arsenic Rule 

- Andrea Matzke, USEPA                    *Office of Ground Water and Drinking Water*
- December 1, 2004

## Agenda

**  ****General Overview **
**  ****Timelines**
**  ****Compliance**
**  ****Options**
**  ****Monitoring**
**  ****Violation Determination**
**  ****Weighted Averaging ****	**
**  ****Exemptions****	**
**	**

## General OverviewFR Notice:  January 22, 2001Compliance Date:  January 23, 2006

**Sets a revised MCL for arsenic **
**	****at:**	**10 ppb  (0.010 mg/L)**
**Sets a **_**new**_** MCLG for arsenic **
**	****at:****	****zero **

**Clarifies monitoring requirements**
- * New Systems/Sources
- * Clarifies compliance w/ MCLs for IOCs, SOCs, and VOCs
**Applies to all CWSs and NTNCWS**
- 		Groundwater and 	Surface water      	Sources

## Arsenic Timeline

**Dec.31,2007**

**Jan.22,2001**

**Dec.31,2006**

**Jan.23,2006**

**Jan.22,2005**

**Jan.1,2005**

**Jan.22,2004**

**Jan.22,2003**

**Jan. 1, 2006**

- State primacy
-  revisions due

- State primacy revisions due for 2 yr. extension

- GW systems may grandfather data after this date

- New systems/sources collect initial samples for IOCs, SOCs, and VOCs

- Rule Promulgation

- Compliance date of Rule

- SW systems complete initial monitoring

- GW systems complete initial monitoring

- SW systems may grandfather data after this date

## CCR Timeline

**Jan.1,2001**

**Jan. 1, 2006**

- 5-10 ppb   Include Educational Statement 1

- 10-50 ppb  Include Health Effects Language2

- > 10 ppb  Include
- Health
- Effects Statement

- 1 40 CFR 141.154(b)(1)

- 2 40 CFR 141.154(f) and 141.153(d)(6)

## Compliance Options

-   Develop a new source
-   Blending before entry points
-   Install treatment
-   POU
-   Exemption Potential

## Monitoring

**Monitoring**

## Violation Determination

- Systems triggered into increased monitoring are not in violation until they have completed one year of quarterly sampling
- Any sample result that causes the RAA to exceed the MCL will be out of compliance immediately
- If a system does not collect all required samples, compliance will be based on the running annual average of the samples collected.

## Weighted Averaging OptionWhat Is It?

**An alternative way of monitoring that could allow a system to be in compliance with higher As levels**

**> MCL     Seasonal       source**

**< MCL       Primary         source**

- As conc. averaged according to  flow or time

**COMPLIANCE DETERMINED**

## Weighted AveragingLimited Applicability

- Look at representativeness of normal operating conditions.  The primacy agency may require additional sampling to account for changes in source use
- The system needs to demonstrate that it can accurately calculate in-system averages with respect to hydraulic behavior within the water distribution system.  This needs to be readily observable by the state
- The amount of time a seasonal well is used may vary from year to year.  For this reason, an extra margin of safety should be built into any weighted averaging approach
- Communication of weighted averaging to consumers

## Weighted AveragingBottomline

- States and EPA Regions with direct implementation authority are responsible for ensuring that any compliance approach will reliably protect public health
- If the system cannot easily and transparently demonstrate how its approach will protect all consumers, then the primacy agency should not approve the plan.

## Exemptions

- If granted an exemption, a PWS may have an additional **3** years to comply (Jan. 23, 2009)
- Systems serving 3,300 people or less *may* be eligible for up to **3** additional 2 yr extensions (Jan. 23, 2015)

## EPA Arsenic Contacts

**HQ****	****     **Andrea Matzke      	      (202) 564-3842**	****     **
**Region 1**   Chris Ryan 	     	      (617) 918-1567
**Region 2**   Robert Poon 	 	       (212) 637-3821
**Region 3**   Steve Maslowski     	       (215) 814-2371
**Region 4**  Vivian Doyle                      	       (404) 562-9942

**Region 5**   Kim Harris 	       	       (312) 886-4239
**Region 6**   Tom Poeton             	       (214) 665-2757
**Region 7**   Ken Deason     	 	       (913) 551-7585
**Region 8**   Anthony Deloach  	       (303) 312-6070
**Region 9**   Bruce Macler             	       (415) 972-3569
**Region 10**  Rick Green      	 	       (206) 553-8504

## EPA Arsenic Websites

- http://www.epa.gov/safewater/ars/implement.html
- http://www.epa.gov/ORD/NRMRL/arsenic/
**For Downloading Presentations and Q&A:**
- http://www.epa.gov/safewater/dwa/rules.html

## Upcoming  2005 Training

-   **Arsenic Face-To-Face Trainings**
-   Approximately 5 regional trainings focused on treatment technologies
-   Spring 2005
-   **Webcasts (ASDWA/EPA Partnership)**
-   10 Webcasts on both Rule and Non-Rule Topics
-   TCR tentative dates:  **February**                                                                                        **	**	              ** March**