1

---------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

Definition of impo rtant t erms used in this document:

1) Designated “unclassifiable”

– an area where EPA could not determine if there was a

violation of the 2008 Lead National Ambient Air Quality Standard ( NAAQS ) or a contribution to a violation in a nearby area, because t h ere was insufficient air quality data for both 2006

- 2008

and 2007

- 2009 and where additional monitoring data for 2010 could not result in a different designation

.

2) Designated “attainment”

– an area which EPA has determined

, based on the most recent 3

yea rs of certified air quality data from 2006

- 2008 or 2007

- 2009

, has no violations of the 2008 Lead NAAQS during 36 consecutive valid 3

- month site means ; and which EPA has further

determine d does not contribute to a violation of the 2008 Lead NAAQS in a nearb y area and that additional monitoring data from 2010 could not result in a different designation

.

3 ) Designated nonattainment area

– an area which EPA has determined

, based on a State

recommendation and/ or on the technical analysis included in this docume nt

, has a violation of

the 2008 Lead NAAQS during the most recent three consecutive years of quality

- assured, certified air quality data.

4 ) Prior nonattainment area

– an area that is currently designated as nonattainment or maintenance for the 1978 Lea d Standard (including both current nonattainment areas and maintenance areas).

5 ) Recommended nonattainment area

– an area a State or Tribe has recommended to EPA be designated as nonattainment

.

6 ) Violating monitor

– an ambient air monitor whose design value exceeds 0.15 micrograms per cubic meter ( μg/m3 ). As described in Appendix R of part 50, a violation can be based on either

Pb

- TSP or Pb

- PM10 data and only three months of data are necessary to produce a valid violating design value.

7 ) 19 78 Lead NAAQS

– 1

. 5 μg/m 3

, N ational Ambient Air Quality Standard for lead promulgated in 1978. Based on Pb

- TSP indicator and averaged over a calendar quarter.

8 ) 2008 Lead NAAQS

- 0. 1 5 μg/m 3

, National Ambient Air Quality Standard for lead promulgated in 2008

. Based on Pb

- TSP indicator and a three

- month rol ling average. Pb

- PM10

data may be used in limited instances

, including to show nonattainment.2 CALIFORNIA Area Designations For the

2008 Lead National Ambient Air Quality Standard s

The Environmental Protection Agency ( EPA ) has revised the level of t he primary (health

- based) National Ambient Air Quality S tandard (NAAQS) for lead (Pb) from 1.5 micrograms per cubic meter (μg/m3) to 0.15 μg/m3 measured as total suspended particles (TSP). EPA has revised the secondary (welfare

- based) standard to be ident ical in all respects to the primary standard

.

Pursuant to section 107(d) of the Clean Air Act, EPA must designate as “ nonattainment ” those

areas that violate the NAAQS and those nearby areas that contribute to violations. The table

below identifies the p ortion of counties in California (CA) that EPA intends to designate

“nonattainment” for the 200 8 lead national ambient air quality standard (2008 Lead NAAQS)

.

Table 1

. Designation Recommendations

Area CA Recommended

Nonattainment

Counties EPA’s Desig nated

Nonattainment

Counties Nonattainment

area for 19 78

Lead NAAQS
Los Angeles County within the South Coast Air

Basin , excluding San Clemente and Santa Catalina

Islands (Southern Los Angeles County) Los Angeles (partial) Los Angeles (partial) na



### T echnical A nalysis for Los Angeles County

within the South Coast Air Basin , excluding San Clemente and Santa Catalina

Islands (Southern Los Angeles County)

Introduction

Th is technical analysis for Los Angeles County identifies the partial cou nty area w ithin the South Coast Air Basin (Southern Los Angeles County) with monitor s that violate the 2008 Lead NAAQS and evaluates nearby areas for contributions to ambient lead concentrations in the area.

EPA has evaluated the surrounding area based on the weigh t of evidence of the following factors recommended in previous EPA guidance :

Air quality in potentially included versus excluded areas ;
Emissions and emissions

- related data in areas potentially included versus excluded from

the nonattainment area , inclu ding population data

, growth rates and patterns and emissions controls; Meteorology (weather/transport patter n s) ; Geography/topography (mountain ranges or other air basin boundaries) ; Jurisdictional boundaries (e.g., counties, air districts, reservations, etc.) ; and Any other relevant information submitted to or collected by EPA (e.g., modeling where done appropriately)

.

### Copyrighted page/s removed. Copyrighted ma terial is not available in Regulations.gov since it may not be reproduced without consent of the copyright holder.

Contact the EPA Docket Center’s P ublic Reading Room to view or receive a copy of this document.

Requests for copies may be made as follows:

In person/writing: Environmental Protection Agency, Docket Center 1301 Constitution Ave NW, 2822T, Room 3334 Washington, DC. 20004

Telephone:

202-566-1744

Fax:

202-566- 9744

Email: docket-customerservice@epa.gov4

In October 2009

, California Air Resources Board (CARB) recommended that the Los A ngeles County portion of the South Coast Air Basin be designated as nonattainment for the 2008 Lead NAAQS b ased on air quality data from 2006

- 2008

. CARB clarified its recommendation to be the Los Angeles County portion of the South Coast Air Basin, exclud ing San Clemente and Santa Catalina Islands, in May 2010. 1 CARB’s recommendation was based on data from Federal Reference Method ( FRM ) or Federal Equivalent Method (FEM) monitor s located in the state

. 2

The Pb air monitors operated by South Coast Air Qua lity Management District (AQMD) are FEM monitors. South Coast AQMD analyzed the filters using a modified analysis FEM. As additional checks on the analysis method

, EPA is reviewing resu lts from filter strip audits and also having f

ilters that contributed to the area’s design value analyzed by an independent lab following a different FEM. Based on EPA’s technical review of the methods, EPA expects to move forward with the nonattainment designation described in this document.

Based on EPA's technical anal ysis and currently available information, which is described below, EPA is intending to designate the Los Angeles County portion of the South Coast Air

Basin , excluding San Clemente and Santa Catalina Islands (Southern Los Angeles County) a s nonattainment for the 2008 Lead NAAQS

.

Air Q uality D ata

This factor considers the l ead design values (in μg/m 3 ) for air quality monitors in Southern Los Angeles County and surrounding area s based on data from 200 6

- 200 8

. A monitor’s design value

indicates whether th at monitor attains a specified air quality standard. The 2008 Lead NAAQS

are met at a monitoring site when the identified design value is valid and less than or equal to

0.15 μg/m 3

. A design value is only valid if minimum data completeness criteria are me t. A lead design value that meets the NAAQS is generally considered valid if it encompasses 36

consecutive valid 3

- month site means (specifically for a 3

- year calendar period and the two previous months)

. For this purpose, a 3

- month site mean is valid if valid data were obtained for at least 75 percent of the scheduled monitoring days in the 3

- month period. For purposes of assessing data capture, data collected before January 1, 2009 will be treated with an assumed scheduled sampling frequency of every s ixth day, as specified by 40 CFR part 50 Appendix R, section 4(c)(i). A lead design value that does not meet the NAAQS is considered valid if at least

one 3

- month mean that meets the same 75 percent requirement is above the NAAQS. That is , a site does no t have to monitor for three full calendar years in order to have a valid violating design value; a site could monitor just three months and still produce a valid (violating) design

value

.

The 2008 Lead NAAQS design values for Southern Los Angeles County a nd surrounding area s are shown in Table 2

.

1 May 12

, 2010 CARB Supplemental Information

2 October 2009 CARB Recommendation5

Table 2 . Air Quality Data

– Pb Monitors in Southern California
County State

Recommended

Nonattainment? Monitor Name Monitor Air Quality System (AQS)

ID Monitor Location Lead Design
Value,

2006

- 2008 (μg/m 3 )

Los Angeles, CA Yes (Partial

County) Exide

– Vernon

,

Rehrig 06

- 037

- 1405

- 01 4010 E. 26 th Street,

Vernon 2.49

Exide

– Vernon, Railyard 06

- 037

- 1406

- 01 Rail Road Yard,
Washington Blvd,

Commerce 0.55 2

Trojan 06

- 037

- 1403

- 01 9440 Ann St. , Santa
Fe Spring s 0.18 1

Exide

– Commerce (formerly Quenell) na 3 LA Paper Box, 61 st St

, City of Commerce 0.14 3

Quemetco 06

- 037

- 1404

- 01 500 S. 7 th St, City of
Industry 0.09 1

Los Angeles

- Main

St. 06

- 037

- 1103

- 02 1630 N. Main St, Los Angeles 0.03

Pico Rivera 06

- 037

- 1602

- 01 4144 San Gabriel River Pkwy, Pico

Rivera 0.03

Lynwood 06

- 037

- 1301

- 01 11220 Long Beach
Blvd, Lynwood 0.03

Long Beach (South) 06

- 037

- 4004

- 02 1305 E. Pacific Coast
Hwy, Long Beach 0.02

Long Beach (North) 06

- 037

- 4002

- 02 3648 N. Long Beach Blvd, Long Beach 0.01

LAX

- Westchester
Pkwy 06

- 037

- 5005

- 01 7201 W.

Westchester
Parkway, Los Angeles 0.01

Riverside
County, CA No Rubidoux 06

- 065

- 8001

- 03 5888 Mission Blvd,

Rubidoux 0.02

Riverside 06

- 065

- 1003

- 02 7002 Magnolia Ave,

Riversid e 0.01

San

Bernadi no

C ounty , CA No San Bernadino 06

- 071

- 9004

- 01 24302 4 th St, San

Bernadino 0.02

Upland 06

- 071

- 1004

- 01 1350 San Bernadino
Rd, Upland 0.02 Monitors in Bold have the highest 2006

- 2008 design value in the respective county.

Table include s monitors with at least one three

- month average between 2006

- 2008. Monitors may not have a full 36 months worth of valid data, 2006

- 2008.

1 Recent data are entered into AQS. Complete historic data are not available in AQS, however, t he 06

- 08 design

valu e as supplied in October 2009 CARB Recommendation , p E4

- 2, is included in the table as it is being used to inform these designations.

2 Recent data are entered into AQS. Complete historic data are not available in AQS, however, the 06

- 08 design

value as s upplied by South Coast AQMD is included in the table as it is being used to inform these designations.

3 Data for this monitor have not been entered into AQS . The 06

- 08 design value as supplied in October 2009 CARB

Recommendation , p E4

- 2, is included in t he table as it is being used to inform these designations.

Within Los Angeles County and nearby counties, ten non

- source oriented sites have collected at

least three consecutive months of Pb data between 2006

- 2008. The highest three

- month average for any of these ten non

- source oriented sites is 0.03 μg/m3 . Higher three

- month ave rages have

been measured at five source

- oriented sites. South Coast AQMD has collected at least three

consecutive months of Pb data between 2006

- 2008 at sites near Exide Technologies in Vernon,

### Copyrighted page/s removed. Copyrighted ma terial is not available in Regulations.gov since it may not be reproduced without consent of the copyright holder.

Contact the EPA Docket Center’s P ublic Reading Room to view or receive a copy of this document.

Requests for copies may be made as follows:

In person/writing: Environmental Protection Agency, Docket Center 1301 Constitution Ave NW, 2822T, Room 3334 Washington, DC. 20004

Telephone:

202-566-1744

Fax:

202-566- 9744

Email: docket-customerservice@epa.gov7

Three monitors in Los Angeles County show violatio n s of the 2008 Lead NAAQS. Therefore some area in Los Angeles County and possibly additional areas in surrounding counties must be designated nonattainment

. We evaluate nearby counties because for each monitor or group of monitors that exceed a standard, nonattainment boundaries must cover a large enough area to include not only the area judged to be violating the standard but also the source areas that are determined to be contributing to the violations. Each area has been evaluated based on the weight of evidence of eight factors and other relevant information.

Emissions and Emissions

- Related Data

Evidence of lead emissions sources surrounding a violating monitor are an important factor for determining whether a nearby area is contributing to a mon itored violation. For this factor, EPA evaluated county level emission data for lead

, population data , and emission s controls

.

Emissions

Emissions data were derived from the 2005 National Emissions Inventory

, version 2 (NEIv2)

, which is the most up

- to

- d ate version of the national inventory. See http://www.epa.gov/ttnchie1/net/2005inventory.html . EPA recognizes that for certain counties, emissions may have changed since 2005. For exampl e, certain large sources of emissions in or near this area may have installed emission controls or otherwise significantly reduced emissions

since 2005. EPA therefore also considered 2008 Toxics Release Inventory (TRI) information for

California. 4 In add ition, South Coast AQMD provided some updated emissions information with their 2009 monitoring network plan. 5 Tab le 3 reflects data from South Coast AQMD, the 2005 NEI, and the 2008 TRI.

There are approximately 20,000 airport facilities in the U.S. at wh ich leaded aviation gasoline is consumed. To evaluate the potential impact of emissions at and near these facilities, EPA

recommends that States use the draft 2008 NEI. A irports in Los Angeles County and surrounding counties emitting over 0.10 tons per y ear of Pb according to the draf t 2008 NEI are listed in Appendix A

.

4 TRI available at http://www.epa.gov/triexplorer/

5 South Coast AQMD 2009 Pb Network Plan , p D

- 9.8 Table 3. California Facilities with Pb Emissions > 0.10 tpy.*

County Facility in State

Recommended

Nonattainment

Area ? Facility Address City Facility Total

Air Releases (tpy)

Kern N o C alPortland Co Mojave Plant 9350 O ak Creek Rd Mojave 0.22

Los Angeles Yes Exide Technologies 2700 S I ndiana St Los Angeles 2.00

Los Angeles Yes BP West Coast Products LLC

Carson 1801 S epulveda Bl Carson 0.79
Los Angeles Yes Quemetco INC 720 S Seven th St City of Industry 0.32

Los Angeles Yes Tesoro Los Angeles Refinery 2101 E Pacific Coast
Hwy W ilmington 0.15

Orange No Johnson Controls Battery Group 1550 Kimberly Ave Fullerton 0.45

San Bernadino No TAMCO 12459 Arrow Rte R ancho
Cucamonga 0.12

San Bernadino No TXI Riverside Cement Oro

Grande Plant 19409 National Trails Hwy Oro Grande 0.10

San Joaquin No Owens

- Brockway Glass

Container Inc Plant #22 14700 W S chulte Rd Tracy 0.26
San Joaquin No Pilkington NA INC 500 E L ouise Ave L athrop 0.12

*Emiss ions reflect highest values from South Coast AQMD, 2008 TRI, and 2005 NEI version 2.

Figure 4 shows airports and point sources in the area near the violating monitors.

As shown in Figure 4, there are a few airports in the northern Mojave Desert part of Los Angeles County, the closest located more than 40 miles from a violating monitor. There are no known Pb sources emitting 0.1 tons of lead per year (tpy) or more on Santa Catalina Island. There is one small airport on San Clemente estimated to emit 0.17 tpy according to the draft 2008 NEI. Geography and meteorology related to the northern Mojave Desert portion of Los Angeles County and the islands are discussed below.

### Copyrighted page/s removed. Copyrighted ma terial is not available in Regulations.gov since it may not be reproduced without consent of the copyright holder.

Contact the EPA Docket Center’s P ublic Reading Room to view or receive a copy of this document.

Requests for copies may be made as follows:

In person/writing: Environmental Protection Agency, Docket Center 1301 Constitution Ave NW, 2822T, Room 3334 Washington, DC. 20004

Telephone:

202-566-1744

Fax:

202-566- 9744

Email: docket-customerservice@epa.gov10

Pop ulation Data , Growth Rates and Patterns

Table 4 shows the 200 8 population for each county in the area being evaluated, as well as the population density and change for each county in that area. These data help assess the extent to

which the concentration of human activities in the area and concentration of population

- oriented commercial development may indicate emissions

- based activity contributing to elevated ambient lead levels. This may include ambient lead contributions from activities that would dis turb lead that has been deposited on the ground or on other surfaces. Re

- entrainment of historically deposited lead is not reflected in the emissions inventory

.

Table 4 . Population Data
County State

Recommended

Nonattainment? 2008

Population 2008

Popula tion
Density (pop/sq mi) Population

Change

2000

- 2008 Population

% Change

2000

- 2008

Kern No 800,458 98 136,948 21 Los Angeles Yes (partial) 9,862,049 2,410 317,937 3
Orange No 3,010,759 3,761 153,841 5

Riverside No 2,100,516 288 541,239 35

San Bernardi no No 2,015,355 100 296,680 17

Ventura No 797,740 429 41,326 5
Source of data:U.S. Census Bureau estimates for 200 8 ( http://www.census.gov/popest/datasets.html ) and estimati on of the area of U.S . Counties

CARB’s March 2010 supp lemental information highlights population, urbanization, and expected growth in the South Coast portion of Los Angeles County versus the Mojave Desert portion in northern Los Angeles County.

Similar to air quality and emissions, there are vast differences between the population and degree of urbanization in the two portions of Los Angeles County. Based on estimates for 2010, the highly urbanized South Coast portion of the County has a population of more than 10 million, compared with a population of 328,000 in the Mojave Desert portion. This means that nearly 97 percent of the County population lives in the South Coast portio n, compared with only 3 percent in the Mojave Desert portion of the County. In

t erms of urbanizat ion, the South Coast portion of Los Angeles County is part of the largest metropolitan area in California. In contrast, the Lancaster

- Palmdale area is the only urbanized area in the Mojave Desert portion of the County. In terms of size, the

South Coast por tion of Los Angeles County is a little more than one and a half times larger than the Mojave Desert portion (2538 square miles versus 1522 square miles). However, the population density is 3,992 people per square mile, compared with only 216 people per squ are mile in the Mojave Desert portion. Over the last decade, the South Coast and Mojave Desert portions of Los Angeles County have realized similar growth rates, with population in both areas showing a seven percent increase from 2000 to 2005 and a two per cent increase from 2005 to 2010. These trends are expected to continue, thereby maintaining the significant d ifferences in population between the two sub

- county

areas. 6

6 March 8

, 2010 CARB Supplemental Information , p 6.11

CARB’s May 2010 supplemental information highlights population, urbanization, and expe cted growth in the South Coast mainland portion of Los Angeles County versus the two Channel Islands in Los Angeles County.

Based on estimates for 2010, the highly urbanized South Coast mainland portion of the County has a population of more than 10 milli on. The population of Santa Catalina Island is less than 5,000, while San Clemente Island, owned and operated by the United States Navy, is virtually uninhabited. This means that more than 99 percent of the population

lives in the South Coast mainland port ion of the County. In terms of size, the South Coast mainland portion of Los Angeles County is close to 20 times larger than both islands combined. However, the population density is 3,992 people per square mile, compared with about 50 people per square mi le on Santa Catalina. Given the limited size of Santa Catalina Island and the military function of San Clemente Island, this discrepancy in population between the mainland and island portions of South Coast Los Angeles County is not expected to change. 7

T he northern, Mojave Desert portion and the offshore, islands portion of Los Angeles County

var y drastically from the South Coast , mainland portion in terms of population density and degree of urbanization. Differences in terms of geography and meteorology are discussed below.

EPA has considered the population growth rate for this area and does not believe that it affects the boundary recommendation.

Emissions Controls

Under this factor, the existing level of control of emission sources is taken into consideration. The emissions data used by EPA in this technical analysis and provided in Table 3 and Appendix

A represent emiss ions levels taking into account any contro l strategies implemented in Southern Los Angeles County on stationary sources prior to the relevant data collection

.

In September 1992, South Coast AQMD adopted Rule 1420 (Emissions Standard for Lead). Aimed at reducing lead emissions from stati onary sources, the rule requires specific emissions controls for gas streams and fugitive lea d

- dust emissions, submittal of compliance plans, and monitoring by sources emitting more than 10 tons of lead per year. 8 CARB’s submittal states that this rule has been very effective in reducing lead emissions. 9

7 May 12

, 2010 CARB Supplemental Information , p 3.

8 “Rule 1420. Emissions St andard for Lead,” South Coast Air Quality Management District, September 11, 1992.

9 March 8

, 2010 CARB Supplemental Information , p 5.12

Meteorology and Geography / T opography

The geography/topography analysis evaluates the physical features of the land that might have an effect on the air shed and, therefore, on the distribution of lead over Los Angeles County. Figure

5 shows air basins in southern California. The State of C alifornia supplemental information supports including the South Coast Air Basin portion of Los Angeles County, and excluding the Mojave Desert portion of the county, based on the substantially different meteorological

conditions in the South Coast Basin an d Mojave Desert, and the presence of the mountain range which act as a barrier to airflow between the South Coast and Mojave Desert.

Meteorological conditions in the South Coast and Mojave Desert portions of Los Angeles County are substantially differen t. The South Coast portion is bounded by the Pacific Ocean, which makes for a more temperate climate with cooler temperatures and a diurnal pattern of on

- shore / off

- shore air flow. Temperatures generally average in the 70s during

the summertime and the 50 s during the wintertime. Average annual precipitation is about 15 inches per year. In contrast to the coastal area, the Mojave Desert portion of Los Angeles County is a high desert area with average temperatures in the 80s during summer and the 40s during the winter. This desert portion of the County receives half as much rainfall, averaging about 7 inches per year.

The South Coast portion of Los Angeles, where the major lead emissions sources are located, is surrounded by mountains which act as barriers t o airflow between the South

Coast and Mojave Desert

.... Although there are a limited number of gaps in these mountains where transport has been documented, transport of lead emissions from the South Coast into the Mojave Desert is highly unlikely, given the weight of lead particles and the rapid decrease in concentration with distance from a source. As a result, emissions sources in the South Coast are not expected to have an impact on lead concentrations in the Mojave Desert portion of the County. 10

10 March 8

, 2010 CARB Supplemental Information , p 6.

### Copyrighted page/s removed. Copyrighted ma terial is not available in Regulations.gov since it may not be reproduced without consent of the copyright holder.

Contact the EPA Docket Center’s P ublic Reading Room to view or receive a copy of this document.

Requests for copies may be made as follows:

In person/writing: Environmental Protection Agency, Docket Center 1301 Constitution Ave NW, 2822T, Room 3334 Washington, DC. 20004

Telephone:

202-566-1744

Fax:

202-566- 9744

Email: docket-customerservice@epa.gov14 the Salton Sea Air B asin, as well as the Mojave Desert Air Basin. Concentrations of

primary pollutants (those emitted directly into the air) are typically highest close to the sources which emit them. However, secondary pollutants (those formed in the air by

chemical reaction of precursors) reach maximum concentrations some distance downwind of the sources that emit the precursors, due to the fact that the polluted air mass is moved inland many miles by the prevailing winds before maximum

concentrations are reached

. 12

CARB sup plied additional justification for excluding the two Channel Islands from the nonattainment area. Santa Catalina and San Clemente Islands are part of Los Angeles County, and fall within the South Coast Air Basin. Approximately 20 miles and 50 miles from the southern border of Los Angeles County (see Figure 5), respectively, Santa Catalina and San Clemente are isolated areas surrounded by water. CARB ’s explanation states , “ Although an onshore/offshore air flow regime impacts both areas, the distance betwe en the mainland South Coast portion of the County and the islands offshore precludes any significant contribution to

lead concentrations from the mainland to the islands. ” 13

The wind direction frequencies for Los Angeles, shown below, indicate that the pre dominant wind direction is from the WNW for winter and from the WSW for spring, summer, and autumn. Although this indicates a potential for transport to the northeastern portion of the county , the air monitoring data (see Figure 2 ) indicate that the measu red ambient air concentration values for lead decrease to below the standard relatively near the source, which is consistent with excluding the Mojave Desert Air Basin portion and the Channel Islands portion of Los Angeles County

f rom the non

- attainment ar ea , and not extending the nonattainment boundary beyond Los Angeles County

.

Figure 6 : Average Wind Direction Frequencies in Los Angeles County, CA

Source: A three

- dimensional bar chart shows the wind frequencies in eight directions for the four seasons . This data

is taken from 1960

- 1992 Solar and Meteorological Surface Observation Network information issued jointly by the

12 “Final 2007 AQMP Appendix II: Current Air Quality,” South Coast Air Quality Management District, June 2007. p II

- 2

- 1.

13 May 12

, 2010 CARB Supplemental Information , p 3.15

U.S. Department of Commerce: National Climatic Data Center and the U.S. Department of Energy: National Renewable Energy Laboratory. T he chart frequencies reflect the directions from which the winds come. Based on EPA’s technical analysis of the info rmation provided by CARB, the South Coast AQMP, and the wind frequencies, EPA believes this information supports the Southern Los Angeles Co unty as the a ppropriate boundary for the non attainment area.

Jurisdictional boundaries

Existing jurisdictional boundaries may be helpful in articulating a boundary for purposes of nonattainment designations, and for purposes of carrying out the governm ental responsibilities of planning for attainment of the lead NAAQS and implementing control measures. These existing boundaries may include an existing nonattainment or maintenance area boundary, a county or township boundary, a metropolitan area boundar y, an air management district, or an urban planning boundary established for coordinating business development or transportation activities.

As noted in CARB’s supplemental information submittal:

... Los Angeles County is divided between two air basins. The southern two

- thirds of the County is located in the South Coast Air Basin (South Coast) and falls under the jurisdiction of the South Coast Air Quality Management District (South Coast AQMD or District). The northern third of the County is located in the Mojave Desert Air Basin (Mojave Desert) and falls under the jurisdiction of the Antelope Valley Air Quality Management District ... The jurisdictional differences, along with the disparity among emissions sources and other factors, justify limiting the le ad nonattainment area to the South Coast portion of Los Angeles County. 14

The jurisdictional split described above is illustrated in Figures 7 and 8. The intended nonattainment area lies entirely within the portion of Los Angeles County that is solely unde r the jurisdiction of the South Coast AQMD

. No tribal lands are located within o r adjacent to the

recommended nonattainment area. T he District will be responsible for developing the Pb state implementation plan and required control strategies

.

14 March 8, 2010 CARB Supplementa l Information, p 1.

### Copyrighted page/s removed. Copyrighted ma terial is not available in Regulations.gov since it may not be reproduced without consent of the copyright holder.

Contact the EPA Docket Center’s P ublic Reading Room to view or receive a copy of this document.

Requests for copies may be made as follows:

In person/writing: Environmental Protection Agency, Docket Center 1301 Constitution Ave NW, 2822T, Room 3334 Washington, DC. 20004

Telephone:

202-566-1744

Fax:

202-566- 9744

Email: docket-customerservice@epa.gov17

Other Relevant Information

Additional information may be found in CARB’s October 2009

, March 2010 , and May 2010

submittals

.

Conclusion

After considering the factors described above, EPA believes it is appropriate for the partial

county listed in Table 1 to comprise the Southern Los Angeles County 2008 Lead NAAQS

nonattainment area

.

Three air quality monitor s in Southern Los Angeles County show violation s of the 2008 Lead NAAQS, based on 200 6

- 200 8 air quality data. All three monitors are located near sources. The ring of non

- source orie nted monitors surrounding the three violating monitors show

concentrations well below the standard. Additionally, t he South Coast and Mojave Desert portions of Los Angeles County are separated by a mountain range, and differ in population, degree of urbanization, number of sources, meteorology and topography

. The mainland South Coast and offshore islands portions of Los Angeles County are separated by twenty miles or more of water, and differ vastly in population, urbanization, and number of sources. T he

southern mainland portion of Los Angeles County c ontain s the violating monitors, the majority of the county’s Pb sourc es, the majority of the population, and falls under one air quality management district’s purview. Based on its consideration of all the relevant, available information, as described above, EPA believe s that the boundaries described herein encompass

the e ntire area that does not meet (or that contributes to ambient air quality in a nearby area that does not meet) the 2008 lead NAAQS.18

Citations

October 2009 CARB Recommendation Letter from James N. Goldstene, Air Resources Board, to Laura Yoshii, U.S. En vironmental Protection Agency Region 9, October 14, 2009 transmitting recommendations for the 2008 Pb NAAQS, with enclosures.

March 8

, 2010 CARB Supplemental Information “State of California Supplemental

Information for Recommended Lead Nonattainment Area , South Coast Air Basin Portion of Los Angeles County: Eight Factor Analysis,” California Air Resources Board, March 8, 2010.

May 12

, 2010 CARB Supplemental Information “State of California Supplemental

Information for Recommended Lead Nonattainment Area , South Coast Air Basin Portion of Los Angeles County Excluding the Channel Islands: Eight Factor Analysis,” California Air Resources Board, May 12, 2010.

South Coast AQMD 2009 Pb Network Plan “Appendix D: South Coast Air Quality Management District Lea d (Pb) Monitoring Network Plan,” South Coast Air Quality Management District, July 2009.19 Appendix A

Los Angeles County and Neighboring Counties: Airports Emitting 0.1 tons per year of Pb or

more, according to the Draft 2008 National Emis sions Inventory20

Appendix A. Los Angeles County and Neighboring Counties: Airports Emitting > 0.10 tpy Pb according to

the draft 2008 NEI.

County Airport in State

Recommended

Nonattainment

Area ? Facility Type City Facility Total

Air Releases (tpy)

Kern No MEADOWS FIELD AIRPORT BAKERSFIELD 0.34

Kern No MOUNTAIN VALLEY AIRPORT TEHACHAPI 0.14

Kern No SHAFTER

- MINTER FIELD AIRPORT SHAFTER 0.13

Kern No CALIFORNIA CITY MUNI AIRPORT CALIFORNIA CITY 0.10

Kern No INYOKERN AIRPORT INYOKERN 0.10

Los Angele s Yes LONG BEACH /DAUGHERTY
FIELD/ AIRPORT LONG BEACH 1.07

Los Angeles Yes VAN NUYS AIRPORT VAN NUYS 0.91

Los Angeles Yes ZAMPERINI FIELD AIRPORT TORRANCE 0.59

Los Angeles Yes LOS ANGELES INTL AIRPORT LOS ANGELES 0.54

Los Angeles No GRAY BUTTE FIEL D AIRPORT PALMDALE 0.49

Los Angeles Yes SANTA MONICA MUNI AIRPORT SANTA MONICA 0.34

Los Angeles Yes BRACKETT FIELD AIRPORT LA VERNE 0.33

Los Angeles Yes EL MONTE AIRPORT EL MONTE 0.24

Los Angeles Yes WHITEMAN AIRPORT LOS ANGELES 0.20

Los Angeles Y es COMPTON/WOODLEY AIRPORT COMPTON 0.18

Los Angeles Yes BOB HOPE AIRPORT BURBANK 0.17

Los Angeles No SAN CLEMENTE ISLAND NALF AIRPORT SAN CLEMENTE ISLAND 0.17

Los Angeles No GENERAL WM J FOX AIRFIELD AIRPORT LANCASTER 0.16

Los Angeles Yes JACK NORTH ROP FIELD/HAWTHORNE MUNI AIRPORT HAWTHORNE 0.16

Los Angeles No BOHUNK'S AIRPARK AIRPORT LANCASTER 0.13

Los Angeles No LITTLE BUTTES ANTIQUE

AIRFIELD AIRPORT LANCASTER 0.12

Los Angeles Yes QUAIL LAKE SKY PARK AIRPORT GORMAN/LANCASTER 0.11

Los Angeles Y es GOODYEAR BLIMP BASE AIRPORT CARSON 0.11

Los Angeles No NICHOLS FARMS AIRPORT PALMDALE 0.11

Orange No JOHN WAYNE AIRPORT

ORANGE COUNTY AIRPORT SANTA ANA 0.79

Orange No FULLERTON MUNI AIRPORT FULLERTON 0.19

Orange No MC CONVILLE AIRSTRIP AIRPORT LAKE ELSINORE 0.17

Orange No LOS ALAMITOS AAF AIRPORT LOS ALAMITOS 0.17

Riverside No FRENCH VALLEY AIRPORT MURRIETA/TEMECULA 0.27

Riverside No JACQUELINE COCHRAN RGNL AIRPORT PALM SPRINGS 0.21

Riverside No HEMET

- RYAN AIRPORT HEMET 0.21

Riverside No RIVERS IDE MUNI AIRPORT RIVERSIDE 0.21

Riverside No CORONA MUNI AIRPORT CORONA 0.19

Riverside No PALM SPRINGS INTL AIRPORT PALM SPRINGS 0.17

Riverside No BERMUDA DUNES AIRPORT PALM SPRINGS 0.1121

Riverside No FLABOB AIRPORT RIVERSIDE/RUBIDOUX/ 0.11

Riverside N o JULIAN HINDS PUMP PLANT

AIRSTRIP AIRPORT DESERT CENTER 0.11

Riverside No MARCH ARB AIRPORT RIVERSIDE 0.11

Riverside No LAKE MATHEWS AIRPORT RIVERSIDE 0.11

Riverside No BILLY JOE AIRPORT TEMECULA 0.11

Riverside No PERRIS VALLEY AIRPORT PERRIS 0.10

Sa n Bernardino No CHINO AIRPORT CHINO 0.38

San Bernardino No CABLE AIRPORT UPLAND 0.26

San Bernardino No ONTARIO INTL AIRPORT ONTARIO 0.15

San Bernardino No SOUTHERN CALIFORNIA

LOGISTICS AIRPORT VICTORVILLE 0.13

San Bernardino No REDLANDS MUNI AIRPORT RE DLANDS 0.12

San Bernardino No GOLDSTONE /GTS/ AIRPORT BARSTOW 0.12

San Bernardino No CADIZ AIRSTRIP AIRPORT CADIZ 0.12

San Bernardino No DANBY AIRSTRIP AIRPORT DANBY 0.12

San Bernardino No IRON MOUNTAIN PUMPING

PLANT AIRPORT DESERT CENTER 0.12

San Ber nardino No BICYCLE LAKE AAF AIRPORT FORT IRWIN/BARSTOW 0.12

San Bernardino No CAMINO AIRSTRIP AIRPORT GOFFS 0.12

San Bernardino No PALISADES RANCH AIRPORT HELENDALE 0.12

San Bernardino No HART MINE AIRPORT IVANPAH 0.12

San Bernardino No RABBIT RANCH AI RPORT LUCERNE 0.12

San Bernardino No CONES FIELD AIRPORT TWENTYNINE PALMS 0.12

San Bernardino No TWENTYNINE PALMS (SELF) AIRPORT TWENTYNINE PALMS 0.12

San Bernardino No B & E RANCH AIRPORT YUCCA VALLEY 0.12

San Bernardino No APPLE VALLEY AIRPORT APPLE VALLEY 0.10

Ventura No CAMARILLO AIRPORT CAMARILLO 0.42

Ventura No SANTA PAULA AIRPORT SANTA PAULA 0.27

Ventura No OXNARD AIRPORT OXNARD 0.25