UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

REGION III

	1650 Arch Street

	Philadelphia, Pennsylvania  19103

DATE:	November 30, 2010

SUBJECT:	Technical Support Document for Virginia’s Adoption of the
Lead Standard, Related Reference Conditions, and Update of Appendices 

			/s/

FROM:	Irene Shandruk, Physical Scientist 

Office of Air Program Planning 

TO:	File

			/s/	

THRU: 	Marilyn Powers, Acting Associate Director 

Office of Air Program Planning

A.  BACKGROUND  

This technical support document (TSD) evaluates the September 27, 2010
submittal of the Virginia State Implementation Plan (SIP) revision
pertaining to the ambient air quality standard for lead and related
reference conditions.

The Clean Air Act (CAA) specifies that EPA must re-evaluate the
appropriateness of its various air quality standards every five years. 
As part of the process, EPA reviewed the latest research and determined
that revised standards for lead were necessary to protect public health.
 EPA revised the level of the primary lead standard to a level of 0.15
micrograms per cubic meter (μg/m3) to provide increased protection for
children and other ‘‘at risk’’ populations against an array of
adverse health effects, most notably neurological effects in children,
which include neurocognitive and neurobehavioral effects.  The secondary
standard was also revised to a level of 0.15 μg/m3 to afford increased
protection for the environment.  EPA promulgated the more stringent
primary and secondary national ambient air quality standards (NAAQS) for
lead on November 12, 2008 (73 FR 66964).

B.  STATE SUBMITTAL

On September 27, 2010, the Commonwealth of Virginia submitted a formal
revision to its SIP.  The SIP revision consists of an amendment which
includes the revised ambient air quality standards for lead, and related
reference conditions.  Virginia(s revision incorporates the revised lead
standards into the Code of Virginia (9VAC5 Chapter 30).  In addition,
the list of appendices to 40 CFR Part 51 was updated under “Documents
Incorporated by Reference” (9VAC5-20-21).

The following are the specific provisions that are being modified or
added:

9VAC5-20-21:  Documents Incorporated by Reference (modified)

	The list of appendices were updated.

9VAC5-30-15:  Reference Conditions (modified)

The reference conditions for lead were updated.

9VAC5-30-80:  Lead (amended)

The revised primary and secondary ambient air quality standard for lead
with a level of 0.15 micrograms per cubic meter was added to this
regulation.

C.  EPA EVALUATION

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?Virginia’s SIP revisions for the ambient air quality standards for
lead are consistent with the Federal standards.

D.  CONCLUSIONS AND RECOMMENDED AGENCY ACTION

EPA approval of the SIP revision is recommended.

