### PEGGY M. 

### HATCH
SECRETARY 

# .$Mate of Ljr-ouis'iana

DEPARTMENT OF ENVIRONMENTAL

### QUALITY OFFICE OF 

### THE SECRETARY

Dr. Al Armendariz, Administrator US EPA Region 6 (6RA) 1445Ross Ave, Suite 1200 Dallas, TX 75202-2733



### RE: State ofLouisiana Recommendationsfor Designation 2010NO2National Ambient Air Quality Standards(NAAQS)

Dear 

### Dr. Annendariz:



### In accordance with Section 1107(d)of the Clean Air Act Amendments of 1990,the state of Louisiana is pleased to provide its recommendations for area designations for the 2010 NO2 NAAQS.

The unavailability of any timely implementation guidance from EPA complicated the recommendation development process and suggests a certain negligence and lack of foresight. The federal rule was finalized on April 12,2010 and no implementationguidance has been issued by EPA. Additionally, your November 24,2010 letter to Governor Jindal indicates EPA's preference to drive the entire state of Louisiana into the designation of "unclassifiable". This approach neglects the exemplary efforts put forth by monitored areas of our state to maintainNO2valuesthat 

### are one halfto one third ofthe value ofthe new standard. As such, we have developed a prudent 

### and logical approach to the recommendations under this standard. To do anythingto the contrary would be a disservice tothe residents of our state.
Using informationtaken from the new NO2 rules that were published on January 22,20 10, we have developedthe following recommendations for area designations:

For Parishes that have monitored NO2values that are below both the 53ppb annual averageand 1OOppb Ihour standard, and where no near-road monitoring is required, we recommend a designation of "attainment".

For Parishes

### that 

### are not monitored, we recommend a designation of "unclassifiable".

For Parishes that have monitored NO2 values that are below both the 53 ppb annual averageand 100ppb I-hour standard, and where near-road monitoring is required, we recommend a designation of "attainment'' for the Parish except for that 

### area where near-road monitoring will be required which is recommended as "unclassifiable".

### Dr. Armendariz N4 Designation Letter January 24,20 11 Page 2

Delineation of the near-road "unclassifiable" areas is made according to the EPA monitoring rule's sighting requirements. The EPA monitoring rulerequires that two (2) new NO2monitorsbe added to our existingnetwork ofnine (9) 

### monitoring sites; onenear-road monitor added in the Baton Rouge CBSA and one in the New Orleans CBSA. DEQ has 

### collaborated with the Department of Transportation and Development (DOTD) to evaluate the highway segmentswith the highest vehicular traffic counts. Linearboundariesalong stretchesofhighway where traffic counts 

### are the highest were drawn. The highesttraffic count location was used as a startingpoint and then the boundary moved in each direction along the highway until reaching the fM 

### traffic monitored location with a count of less 

### than 50% of the highest location. Boundary widths were based upon the rule's premise that concentrationsfall off very quicklyat more than 50meters fromthe edgeofthe traffic lane.

Based on a review of the quality-assured NO2monitoring data for the period 

### 2008-2010, Louisiana recommends the followingdesignahons:
Designation of "attainment" for 5 monitored parishes in the state 

## - Iberville, Ascension, Livingston, Calcasieu and WestBaton Rouge. Designation of "attainment" for 2 monitored parishes in the state with "unclassifiable" areas denoted within their boundaries

o 

### East Baton Rouge with the "unclassifiable" area extending along 1-10 from mile marker 155 to marker 164, 

### along 1-12 

### from mile marker 0 to marker 5 and to a distance no greater than 

### 50 meters from the outeredge ofthe East and West travel lanes, and

o 

### Jefferson with the "unclassifiable" area extending along 1-10 from mile marker 224 to the Orleans Parish line and to a distance no greater than 50 meters from the outer edge ofthe East and West travel lanes. A designationof "unclasstfiable" for the remaining 

### parishes asthere isno monitored data forthem.

Attached please fmd a complete list of the 64 

### Louisiana Parishes by Air Quality Control Region and the recommendeddesignations.



### Ifyou have any questions, please contactTegan Treadaway,Administrator of the Air Permits Division, Office of Environmental Services at 225-219-3408

c: 

### Thomas Diggs, EPA Guy Donaldson, EPA

AttachmentDesignatedArea Caldwell Parish Catahoula Parish Concordia Parish East Carroll Parish Franklin Parish Grant Parish La Salle Parish Madison Parish Ouachita Parish Richland Parish Tensas Parish Union Parish West Carroll Parish 

### State of Louisiana 

## 2010 NO2Designation Recommendations

DesignatedArea Avoyelles Parish Bienville Parish Bossier Parish Caddo Parish Claiborne Parish DeSoto Parish Jackson Parish Lincoln Parish Natchitoches Parish Rapides Parish Red River Parish Sabine Parish Vernon Parish Webster Parish Winn Parish AQCR 019: Monroe-El Dorado Interstate Recommended Designation Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable

AQCR 022: Shreveport-Texarkana-TylerInterstate Recommended Designation Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable Unclassifiable

### State of Louisiana 2010 NO2

### Designation Recommendations

AQCR 106: S. Louisiana-SE Texas Interstate DesignatedArea Recommended Designation Acadia Parish Unclassifiable Allen Parish Unclassifiable Ascension Parish Attainment Assumption Parish Unclassifiable Beauregard Parish Unclassifiable Calcasieu Parish Attainment Cameron Parish Unclassifiable East Baton Rouge Parish Attainment (exeefor mar road)

o 1-10 from Mile 155to 164,50 metersfrom edge Unclassifiable ~d.t~...~~.. tor .ear road)

o 1-12from Mile 0 to5,SO metersfrom edge Unclassifiable ldel#nea!#on tor East Feliciana Parish Unclassifiable Evangeline Parish Unclassifiable Iberia Parish Unclassifiable lbewille Parish Attainment Jefferson Davis Parish Unclassifiable Jefferson Parish Attainment lelcept for near 1-10 from Mile 224 toOrleans Parish Line, 50 meters from edge Unclassifiable ldellnea~on tor ...w road) Lafayette Parish Unclassifiable Lafourche Parish Unclassifiable Livingston Parish Attainment Orleans Parish Unclassifiable 1-10fromJefferson Parish Line to Mile 237, 50 meters from edge Unclassifiable (delrneat80nforncarroadl Plaquemines Parish Unclassifiable Pointe Coupee Parish Unclassifiable St. Bernard Parish Unclassifiable St. Charles Parish Unclassifiable St. Helena Parish Unclassifiable St. James Parish Unclassifiable St. John the Baptist Parish Unclassifiable St. Landry Parish Unclassifiable St. Martin Parish Unclassifiable St. Mary Parish Unclassifiable St. Tammany Parish Unclassifiable Tangipahoa Parish Unclassifiable Terrebonne Parish Unclassifiable Vermilion Parish Unclassifiable Washington Parish Unclassifiable West Baton Rouge Parish Attainment West Feliciana Parish Unclassifiable