janice K. Brewer Governor



# JUL 132009 ARIZONA DEPARTMENT OF 

## ENVIRONMENTAL QUALITY
1110 West Washington Street • Phoenix, Arizona 85007 (602) 771-2300 • www.azdeq.gov

Ms. LauraYoshii, Acting Regional Administrator U.S. Environmental ProtectionAgency, Region IX Mail Code: ORA-l 75 Hawthorne Street San Francisco, CA 94105 Benjamin H. Grumbles Director

RE: Maintenance ofthe PM10 NAAQS andLimited Maintenance Plan design values for the Payson PM10 maintenance area- 2004

- 2008

DearMs. Yoshii:

The purpose ofthis letteris to provide EPA 2008 monitoring datafor the PaysonPM10 maintenance area in orderto: 

### 1. Demonstrate that the area continues to meet the PM10 national ambient air quality standards (NAAQS), and 2. Demonstrate that the area continues to meet the design value criteria for a Limited Maintenance Plan (LMP). On February 7, 2002, the Arizona Department ofEnvironmental Quality (ADEQ) submitted a LMP for the Payson PM10 nonattainment area and a request for redesignation to attainment. Effective August 26, 2002 (67 FR43020; June 26, 2002), EPA redesignated Paysonto attainment for the 24-hour and revoked annual PM10 NAAQS. As part ofthe LMP, ADEQ committedto monitorthe area's air quality and submit annual reports toEPAregarding the air quality status ofthe Payson area. The accompanying analysis demonstrates that the PaysonPM10 maintenance area continuedto meetthe LMP design value criteria in 2008 (see Enclosure 1). The ambient air concentrations, attached as Enclosure 2, demonstrate that the Payson PM10maintenance area continued to meetthe 24-hour PM10 NAAQS in 2008. This analysis is based onthe five years ofmonitoring data beginning in 2004 and ending in 2008. Payson continues to qualify for a LMP.

Northern Regional Office 1801 W. Route 66 • Suite 117 • Flagstaff, A2 86001 (928) 779-0313 Southern Regional Office 400 West Congress Street • Suite 433 • Tucson, AZ 85701 (520) 628-6733 Printedon recycled paper

### Ms. Yoshii Page 2 of2

Ifyou have any questions regarding this submittal, please contactNancy Wrona, Director, Air Quality Division, at (602) 771-2308 or Diane L. 

### Arnst, Air Quality Planning Section Manager, at (602) 771-2375. 

# 7J

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# ;!li 

# /

# /~(i~!**~to~ .~**  (/

# '~ Benjamin H. Grumbles Director Enclosures (2)

cc: The Honorable Shirley Dawson, Chairman, Gila County Board ofSupervisors The Honorable Kenny Evans, Mayor, Town ofPayson Colleen McKaughan, EPA Region IX Wienke Tax, EPA Region IX RayErlandsen, Acting CommunityDevelopment Director, Town ofPayson Debra Galbraith, TownManager, Town ofPayson StevenBesich, Gila County Joe Mendoza, Gila County

## Payson 2004-2008 PM10

## Design Values and Demonstration for Continued Eligibility ofLimited Maintenance Plan

ArizonaDepartment ofEnvironmental Quality Air Quality Division Ill0 West Washington

Phoenix, 

### AZ 85007

June 23, 2009

### This page is intentionally blank.Summary 

### EPA's 

### Limited Maintenance Plan (LMP) Option for Moderate PM 10 

### Nonattainment Areas guidance requires an annual demonstration ofthe 24-hour PM10

### Design Value (DV) for eachLMP area to determine ifthe area continues to meet the eligibility requirements for an LMP rather than a full maintenance plan. Data from the five year period 2004-2008 were used to determine continued eligibility for the Payson PM10 

### Maintenance Area. Data from this period demonstrate that Payson continued to meetEPA's 24-hour PM10 

### Standardin 2008. Procedure 

### The Air Quality System (AQS) database is checked to verify that sample data for each year ofthe selected period have been reported to 

### the AQS. To satisfy EPA requirements, data completeness for each calendar quarter must be 75 percent or greater. If data completeness is between 50 percent and 75 percent for any quarter, a substitution procedure may be followed to enable use of the data for LMP compliance demonstration (see EPA's 

### Guideline on Exceptions to Data Requirements for Determining Attainment of the Particulate Matter Standards.) If data completeness is less than 50 percent, use ofdata substitutions is prohibited. Calculations should be based on the most recent five years ofmonitoring data, for this report the five-year period spans 2004-2008. Data from this period are then categorized into three-year periods, in this case 2004-2006, 2005-2007, and 2006-2008. To determine eligibility, data completeness for each ofthe three-year periods must be verified. After completeness has been verified, the highest 24-hour sample for each calendar quarter is identified. The highest sample of the four calendar quarters is then identified. Next, the highest sample for each year in the threeyear period is identified. The highest ofthe three samples is then identified as the period's DV and selected for testing against the LMP limit, 98 ug/m3• 

### Ifthe DV is equal to or less than 98 ug/m3

, 

### the maintenance area continues to qualify as an LMP. If the DV exceeds this limit, then the site-specific Critical Design Value (CDV) must be calculated (see Attachment A of the LMP guidance). If the DV is less than the CDV, the maintenance area still qualifies as an LMP. Results 

### The highest 24-hour PM10

### values for each three-year period are listed in Table I. The DV for the 5-year period of record is 81ug/m3

, 

### below the 98 ug/m3 

### criteria used to qualifY for a LMP. Therefore, Payson remained eligible for LMP status in 2008.References 

### 1. EPA. 

### Guideline on Exceptions to Data Requirements for Determining Attainment ofthe Particulate Matter Standards, 1987. 2. Chu, Shao-Hang, 

### "Attachment A. Critical Design Value Estimation and Its Applications", EPA Memorandum: Limited Maintenance Plan Option for Moderate PM10 Nonattainment Areas. J. J. No. of ···.
. No. of**':r.lfea~** _Quarter Days in**Possibl~** ·



# . . 

# •: Quarter

. Samples,'


# ... ·.. ',','.!!:·:::i·:"'·:'·"'" 1 91 15 2 91 15 2004 3 92 16 4 92 15 Annual 61

.

### ··.······· 

# ·. . . . 1 90 15 2 91 16 2005 3 92 15 4 92 16 Annual 62

. ··:. 

# "' 1 90 15 2 91 15 2006 3 92 15 4 92 17 Annual 62 

### Payson 24-honrPM10 

### StandardDesign Valoes Three-YearPeriod SummaryStatistics AQS # 04-007-0008 AAAD # 16317

. · . .. No. Of Average 2nd %Data

__ Max24-hr. "Actual**C~rqp~~e_ness** PM1o .•**,,~f~ple** Highest ·'samples 

# . ..... (ug/m'3)

.. ,, ,,...,.,, Sample 2004-2006 Design Values 15 100 15.7 37 32 14 93 19.4 32 24 14 88 20.4 53 49 14 93 20.6 36 30 57 93 19.0 53 49 No. of Actual Exceedances

.

# ... · ··. 0 0

. 0 0 0

. ..· ::,:

__ ' ' .. . ·. . . 

# . .... '.·..·. 7 47 22.9 81 24 0 15 94 19.7 33 29 0 14 93 19.6 33 30 0 14 88 26.2 47 47 0 50 81 0



### .................., .· 

# ... 15 100 32.3 66 62 0 15 100 21.4 32 29 0 14 93 14.6 41 22 0 16 94 26.3 43 40 0 60 97 23.7 66 62 0 2004-2006 Design Value= ..

. .. . 3-year Max 24-hr. Annual
---- Sample in Average 3-Year Period

. . . ......· ..

* 81 • EPA guidelines prohibit the use ofdata substitutions when completeness for a quarter is less than 50%. Calculation ofthe three-year annual average is not possible with incomplete data. For 01 2005, less than 50% data completeness, use of substitutions is not an option. For 02 2005, extra run on 6/13/05, so possible samples 16 instead ofthe scheduled 15. For 04 2006 extra run on 11/15/06, so possible samples 17 instead ofthe scheduled 16.**~--------··-----··-------------** ----.,

### ' "" 2**··~.**

# r~~:;~ear ... No. of No, of Quarter Days in Possible**Quart~r.** Samples
" .· --· .. ' 

### 1 90 15 2 91 16 2005 3 92 15 4 92 16 Annual 

### 62 

### ,.,.:·",' 1 90 15 2 91 15 2006 3 92 15 4 92 17 Annual 

### 62 ,' ... ,,,';.;;,,,.,,,,.,, •,:' ', ,; 

# ·_:, " 

### 1 90 15 2 91 15 2007 3 92 16 4 92 15 Annual 

### 61 Payson 24-honrPM10 

### StandardDesign Valnes Three-YearPeriod Snmmary Statistics

AQS # 04-007-0008 AAAD # 16317

.:,,...,.,.;;'·:::·:':·:,::.::::·
.... ," No. Of '2ild %**Oat~** ....: ..**~.:··:.::,:·**..: 1:· ::Average .Max24-hr,, Actual 'pM,o ",sample Highest::·""'''**CC!m.R,I,~~eness** Samples (uglnr'3) Sample , " " 

### 2005-2007 Design Values 

### 7 47 22.9 81 24 15 94 19,7 33 29 14 93 19.6 33 30 14 88 262 47 47 50 81 "> 

# ·.·. 15 100 32,3 66 62 15 100 21A 32 29 14 93 14,6 41 22 16 94 26,3 43 40 60 97 23,7 66 62


### .-

.. - .. 

### 14 93 22,2 43 31 15 100 23,5 62 34 15 94 1R8 32 31 15 100 27,8 41 39 59 97 23,1 62 43 ,, ",:·:·,,

# .. : '.'''·:·.:.··'::·::':::·,:.:, ' Max 24-hr, #

..()f.r::·':::· , , 3-year Sample in Acwal

. Annual

- Exc;Eiecfances:

## A~~~·;;,, 3-Year

" " :**~~riod** 

### 0 0 0 0 0 " "<" ·-·· 

### 0 0 0 0 0

. . . 

### ' ,,,; " 

## ,, . '' 

### '" '"' " " 

### 0 0 0 0 0 2005-20P7 Design Value 

### = 

### • 81 * EPA guidelines prohibit the use of data substitutions when completeness for a quarter is less than 

### 50%, Calculation ofthe three-year average is not permitted with incomplete data. For 

### 01 2005 data completeness is less than 

### 50%; EPA guidelines prohibit data substitutions when completeness is less than 

### 50%, For 

### 02 2005 extra run on 

### 6/13/05, so possible samples 

### 16 instead ofthe scheduled 

### 15, For 

### 04 2006 extra run on 

### 11/15/06, so possible samples 

### 17 instead ofthe scheduled 

### 16,

---

## ~~~!! 

# .**'~** : 

### ··.·

.. No. of N<>- of**.r.e~r,:** · Quarter Possible· Days in

. Quarter**S~!)lples** 1 90 15 2 91 15 2006 3 92 15 4 92 17 Annual 62

. ,. 1 90 15 2 91 15 2007 3 92 16 4 92 15 Annual 61



# .; .. . . ,,,. 1 91 16 2 91 15 2008 3 92 15 4 92 15 Annual 61 

### Payson 24-hourPM10 

### Standard Design Values Three-YearPeriod Summary Statistics AQS # 04-007-0008 AAAD # 16317

2nd 

# J

. .:. .**~,yt~'** No. Of % Data Average .PM,. Hi!Jhesl Actual

..

.

### ~om~leten'l**(U!jl("~ ):** **:sarrtPI~.,;** 

## ,,:::·**SamJ<]~s·•** Sample .· 2006-2008 DESIGN VALUES 15 100 32.3 66 62 15 100 21.4 32 29 14 93 14.6 41 22 16 94 26.3 43 40 60 97 23.7 66 62 .No; ofActual ••Exceedances

·.· •·····' 0 0 0 0 0 ),''-'' ·: 

### : ·'

.. . .... . .. · 

### ,,., 14 93 22.2 43 31 0 15 100 23.5 62 34 0 15 94 18.8 32 31 0 15 100 27.8 41 39 0 59 97 23.1 62 43 0
' .. · ·.. ._,, .., ..,,,,:,::·
..· . ·,' ,, ... ·''' ,,:,• . 14 88 22.3 32 30 0 15 100 25.3 43 38 0 15 100 14.2 20 17 0 15 100 25.5 39 39 0 59 97 21.8 43 39 0 2006-2008 Design Value= For Q4 2006 extra run on 11115106, so possible samples 17 instead ofthe scheduled 16. 3-year Max24-hr.: •• Annual Sample in 3- ft.verage Year Period

,,

.·. ,,,,, ...

.

23 66