2008 PM2.5 Plan 

# Appendix A

Ambient Air Quality Data and Analysis2008 PM2.5 Plan 

### This page intentionally blank.San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-1 

# Appendix A: Ambient Air Quality Data and Analysis

A.1 INTRODUCTION

This Appendix provides 2004-2006 PM2.5 data analysis, a description of the PM2.5 attainment calculation process, 1999- 2006 trends analysis, and ambient PM2.5 air quality data. This information supplement s the overview of ambient PM2.5 data included in Chapter 1.

A.2 OVERVIEW OF RESULTS: 2 004-2006 ANNUAL AND 24-HOUR PM2.5 AVERAGES

Air quality meets the 24-hour PM2.5 standard when the 3-y ear average of the annual 98 th 

### percentile PM2.5 value is less than or equal to 65 μ g/m 3 

### at each monitoring site. “Daily value” for PM refers to the 24-hour average concent ration of PM calculated or measured from midnight to midnight (local standard time) for PM2.5. Average and mean refer to an arithmetic mean. All the San Joaquin Valley (SJV) air monitoring sites meet the 24 hour “1997” PM2. 5 NAAQS (Table A-1).

Air quality meets t he annual PM2.5 standard whenever the 3-year average of the annual mean PM2.5 concentrations is less than or equal to 15.0 μ g/m 3 

### . Most of the SJVAPCD sites PM2.5 moni tors are above the annual m ean PM2.5 NAAQS (Table A2).

See Section A.3 of this appendix for information on how these calculations are completed, and see Section A.4 for data analysis from 1999-2006.

Table A-1 SJV PM2.5 98th Percen tile Value, 2004-2006, (μg/m 3 

### )
SJV SITE 2004 2005 2006 AVG. 04-06 Stockton 36.0 44.0 42.0 41
Modesto 45.0 55.0 52.0 51
Merced 43.0 48.3 43.8 45
Fresno-1st 52.0 71.0 51.0 58 Fresno-Winery 49.4 71.2 55.0 59 Clovis 42.4 77.0 51.3 57 Corcoran 49.4 74.5 50.1 58
Visalia 54.0 65.0 50.0 56 Bakersfield-Golden 53.8 74.9 64.4 64 Bakersfield-California 63.1 63.6 60.5 62 Bakersfield-Planz 78.6 66.4 50.6 65

Involves data substitution

98th percentile value affected by flagged dataSan Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-2 Table A-2 SJV PM2.5 Annual Mean Values, 2004-2006 (μg/m 3 

### )


## SJV PM 2.5 

## Annual Mean Value

SJV SITE 2004 2005 2006 AVG. 04-06 Stockton 13.2 12.5 13.1 12.9 Modesto 13.6 13.9 14.8 14.1 Merced 15.3 14.1 14.8 14.7 Fresno-1st 16.4 16.9 16.8 16.7 Fresno-Winery 17.0 16.9 17.6 17.2 Clovis 15.8 16.0 16.8 16.2 Corcoran 17.3 17.6 16.7 17.2 Visalia 17.0 18.8 18.8 18.2
Bakersfield-Golden 18.1 18.9 18.6 18.5 Bakersfield-California 19.0 17.9 18.7 18.5 Bakersfield-Planz 17.4 19.9 19.3 18.9



### A.3 PM2.5 ANNUAL AND 24-HOUR ATTA INMENT STATUS CALCULATIONS

The San Joaquin Valley Unified Air Pollution Control District (Distr ict) calculated the Valley’s attainment status according to t he requirements of the U. S. Environmental Protection Agency’s (EPA) April 1999 document, Guideline on Data Handling Conventions for the PM NAAQS , and Appendix N of 40 Code of Federal Regulations (CFR) part 50. PM2.5 values are calc ulated under both the annual and 24-hour NAAQS for each PM2.5 air quality-monitoring site t hat uses a federal reference method (FRM) monitor. There are 11 such air quality-monitoring sites 1 

### in the eight-county Valley: at least one monitor in each county except Mader a and three monitoring sites in both Kern and Fresno Counties due to t heir large population concentrations (in Bakersfield and Fresno/Clovis respectively). On March 21, 2007, District sta ff downloaded the data from EPA’s Air Quality System (AQS) website, the official repository for ambient air quality data (see Table 8 at t he end of this Appendix). Fr om this data, the District calculated the 2004 – 2006 daily and annual PM2.5 values accounting for the following:

 Rounding conventions

 Data completeness

 Varying sampling schedules

 Data validity flags

1 For more details on the San Joaquin Valley air monitoring sites, refer to San Joaquin Valley Air Pollution Control District Ambient Air Monitoring Network Plan, May 29, 2007, http://www.valleyair.org/notices/Docs/05-29- 07/AMNPlanComment.pdf

. Annual average conisdered valid (Each Q>11 Samples and Annual Avg >Standard) but does not meet the 75% completeness requirement.San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-3 A.3.1 Rounding Conventions

The starting point for annual and 24-hour PM2.5 averages is the ambient air quality data collected from the EPA-approved monitori ng network operated in the San Joaquin Valley. The recorded concentrations are entered with one decimal place, and any other decimal places are truncated, not rounded (s o 18.29 becomes 18.2, not 18.3). As the calculations are carried out (as described th roughout this appendix), a ll of the available decimal places are retained until the final result is determined. Then, final annual PM2.5 averages are rounded to the nearest 0.1 μg/m 3 

### (so 0.05 μg/m 3 

### is rounded to 0.1 μg/m 3 

### ). Final 24-hour PM2.5 averages are rounded to the nearest 1 μg/m 3 

### (so 0.5 μg/m 3 

### is rounded to 1 μg/m 3 

### ).

A.3.2 Data Completeness

The data completeness test is performed fo r each site prior to calculating the 98 th


### Percentile and Annual Mean PM2. 5 values to ensure that each site has enough values to be compared to the NAAQS. A site meet s the data completeness test when at least 75% of the scheduled sampling days for each quarter have valid data. The data completeness requirements for calculating the PM2.5 Annual Mean differ from the 24- Hour Daily PM2.5 Value.

For the annual PM2.5 values, on a site-by-site basis, the annual mean for that year and site is valid if each quarter has at least 75% of the scheduled sample days. For annual average calculations, quarters with at leas t 11 samples but less than 75 percent data completeness are included in the computation if the resulting annual average is greater than the level of the NAAQS, even though that site does not have a valid data for the year. No data is substituted for missing dat a. This method allows for nonattainment determinations, but cannot be used to prove attainment.

For the 98 th 

### percentile PM2.5 values, when less than 75% of the amount of valid data that should have been yielded from a quarter’ s scheduled sampling days is available, 40 CFR Part 50 Appendix N allows for estimati on of missing values provided that the following requirements must be met:

• First, the site must have valid data for at least 50% of the scheduled number of samples for each quarter fo r all three years.

• The emissions and meteorology for the quarters to be substituted must be comparable to the emissions and meteorol ogy for the quarters in question.

Once the above criteria ar e met, two approaches can be used to fill in for missing scheduled sampling days:

• Replace the missing data with collocated data from the same site and day, if such data is available.San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-4 • When there is no data from the same site and the same day, replace the missing data with the maximum concentration reco rded at the site during the same quarter over the three-year period in question.

Table A-3 shows the data completeness of the PM2.5 values by quarter from 2004 through 2006. Since the data for some site s were incomplete, Table A-4 shows the substitutions for the 2004 through 2006 dataset.

Table A-3 Data Completeness by Quarter, 2004 – 2006, as Percentages

2004 2005 2006 Site 1 2 3 4 1 2 3 4 1 2 3 4 Bakersfield- Planz Road 87.1 100.0 87.1 53.3 80.0 83.9 90.0 90.3 96.7 60.0 93.5 80.6 Bakersfield-California Ave 76.9 83.5 69.6 80.4 75.6 91.2 81.5 80.4 81.1 89.0 90.2 88.0 Clovis-N Villa Ave 93.5 100.0 100.0 100.0 100.0 100.0 100.0 71.0 100.0 100.0 93.3 93.5 Fresno-1st Street 92.3 94.5 91.3 83. 7 88.9 84.6 96.7 98.9 98.9 95.6 94.6 91.3 Modesto-14th Street 100.0 100.0 100.0 100.0 100.0 96.8 100. 0 100.0 100.0 100.0 100.0 100.0 Stockton-Hazelton Street 100.0 100.0 100.0 100.0 103.3 100.0 96.7 100. 0 100.0 100.0 100.0 100.0 Visalia-N Church Street 100.0 100.0 77.4 106.7 86.7 103.2 96.7 96.8 100.0 93.3 96.8 100.0 Bakersfield-Golden State 90.3 93.3 100.0 100.0 100.0 100.0 93.3 96. 8 100.0 100.0 93.3 100.0 Corcoran-Patterson Avenue 83.9 93.3 100.0 93.3 93.3 93.3 93.3 100.0 76.7 93.3 93.3 93.5 Fresno-Hamilton and Winery 93.5 100.0 100.0 100.0 100.0 100.0 86.7 100. 0 100.0 100.0 80.0 100.0 Merced-2334 M Street 90.3 100.0 100.0 100. 0 100.0 100.0 100.0 96.8 93.3 100.0 100.0 100.0

Collected data is less than 75 % complete.



### Table A-4 Data Substitution for 98 th 

### Percentile Calculations, 2004-2006

Air monitoring site Incomplete quarter Substituted value Substituted maximum value from How many times substituted Bakersfield - Planz 2 nd Qtr. 2006 30.6 μ g/m 3 2 nd Qtr. 2005 16 times
Bakersfield - Planz 4 th Qtr. 2004 78.6 μ g/m 3 4 th Qtr. 2006 13 times
Bakersfield - California 3 rd Qtr. 2004 63.1 μ g/m 3 3 rd Qtr. 2004 24 times
Clovis - Villa 4 th Qtr. 2005 77.0 μ g/m 3 4 th Qtr. 2005 9 timesSan Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-5 A.3.3 Varying Sampling Schedules

Table A-5 shows the sampling schedules for S an Joaquin Valley air monitoring sites. For non-seasonal monitoring sites, with a “year round” schedule, the sampling cycle does not change during the year. For seasonal monitoring sites, a 1 in 3 day sampling cycle is used from October through March a nd a 1 in 6 day sampling cycle from April through October. This seasonal schedule ensu res that more samples are taken during the times of year when PM2.5 tends to be the highest.

Table A-5 Sampling schedules for SJV air monitoring sites, 2004-2006

Air Monitoring Site Sampling Cycle Schedule
Bakersfield- Planz 1 in 3 day year round Bakersfield - California Daily year round Fresno - 1 st Daily year round Modesto - 14 th 1 in 3 day year round Stockton - Hazelton 1 in 3 day year round Visalia - Church 1 in 3 day year round Merced - M st 1 in 3, 1 in 6 day seasonal Fresno - Winery 1 in 3, 1 in 6 day seasonal Corcoran - Patterson 1 in 3, 1 in 6 day seasonal Bakersfield - Golden 1 in 3, 1 in 6 day seasonal Clovis - Villa 1 in 3, 1 in 6 day seasonal



### The 98 th 

### percentile is defined as the daily value out of a year of monitoring data below which 98 percent of all values in the group fa ll. The procedure for ca lculating the 3-year average 98 th 

### percentile value when the site has comp lete data is as follows: first, sort all data values collected in each year from lowest to highest. Then assign a rank to each data value. Assign rank 1 to the lowe st 24-hour average in each year, rank 2 to the second lowest, and so forth. Next, multiply the number of samples taken in the year by 0.98. Take the integer part of t he product and add 1. This gives the rank corresponding to the 98 th 

### percentile. Find the value that corresponds to the rank. Calculate the 3-year average of all three values for the 98 th 

### percentile. Round decimals 0.5 or greater up and those less than 0.5 down. Compare the result to the standard of 65 μ g/m 3



### . The sample calculation for the 3-year average 98 th 

### percentile value for Bakersfield - Planz is as follows: First, apply the dat a completeness test on 2004, 2005, and 2006 Bakersfield - Planz values. As mentioned in the previ ous paragraph, Bakersfield - Planz had incomplete data for 2006 2 nd 

### Quarter and 2004 4 th 

### Quarter. 2005 Bakersfield - Planz data was complete. The maximum va lue over three years for the same quarter was 78.6 μ g/m 3 

### , which occurred in 4 th 

### Quarter of 2006 (substituted 13 times). The maximum value over three years for the 2 nd 

### Quarter at Bakersfield - Planz was 30.6 μ g/m 3 

### , which occurred in 2005 (substituted 16 time s). After data subs titution, sort all data values collected in a year from lowest to highest.San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-6 Assign a rank for each data value. Rank 101, 100, 99 data points in 2006 were 78.6, 64.7, 50.6 μ g/m 3 

### , respectively. Next, calc ulate the rank of the 98 th 

### percentile for the year. Multiply, the number of samples ta ken in 2006 (101 samples) by 0.98, which equals 98.98. Then, take the integer part of the product and add 1. This gives the ranking that corresponds to the 98 th 

### percentile, which would be 99. Rank 99 corresponds to 50.6 μ g/m 3 

### value, which is the 2006 98 th 

### percentile value. In order to find the 3-year average 98 th 

### percentile value, take the 98 th 

### percentile values by year as shown in Table 1, 78.6 (2004), 66.4 (2005), and 50.6 (2006) add them and divide by 3. Round the answer to the nearest integer, which would be 65 μ g/m 3 

### . Since this value is less than or equal to the PM2.5 NAAQS, Bakersfi eld - Planz is in attainment of the 24 hour PM2.5 NAAQS.

Calculating the 3-Year Average 98 th 

### Percentile for PM2. 5 for seasonal sampling frequencies

Five sites (Fresno - Winery, Clovis - Villa, Bakersfield - Golden, Corcoran - Patterson, and Merced - M Street) have seasonal samp ling frequencies that change during the year, as shown in Table A-5. Special calc ulations were performed for these sites to take the seasonal sampling frequencies into account.

The seasonal sampling calculation uses the following formula, where the smallest measured concentration, x, makes W ( x ) > .98:

), ( ) ( ) ( x FLow dlow dhigh dlow
x FHigh dlow dhigh dhigh dhigh x W + + + =

dhigh = number of calendar days in the “High” season, dlow = number of calendar days in the “Low” season, ( dhigh + dlow = days in a year)



### a season in samples of number x are that a season in samples of number
x Fa ≤

= ) (

such that F a (x) can be either High or Low, x is the measured concentration, and dhigh / (dhigh +dlow) and dlow / (dhigh +dlow) are constant and are called seasonal “weights”



### Example: Bakersfield – Golden 98 th 

### percentile value, 2006

The following example shows the pr ocedures in determining the 2006 98 th 

### percentile value at Bakersfield - Golden, using the s easonal sampling calculation. The sampling cycle at Bakersfield - Golden is once every third day during the high months (October, November, December, January, February, and March) and once every six days during the low months (April, May, June, July, August, and September). Table A-6 is aSan Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-7 simplified version of the above equation in spreadsheet form. The high season ranking is shown with associated concentration values.

High season seasonal weight (SW) is calc ulated by taking the number of calendar days in the high season divided by the total number of calendar days in the year (182 days / 365 days) = 0.499.

FHigh is number of samples in season that are higher than the sample shown. For example, for the 61 st 

### rank concentration of 76.4 μ g/m 3 

### , FHigh is calculated by 61 samples (number of samples in the high se ason that are less t han then the smallest measured concentration) / 61 samples (number of samples in the season), which is equal to 1.

Low season SW is calculated by taking the number of calendar days in the low season divided by the total number of calendar days in the year (183 days / 365 days) = 0.501.

Since all of the high concentrations at Ba kersfield-Golden for the calculated year occurred in the high season, FLow is 1. After using the followi ng equation to calculate W(x):

), ( ) ( ) ( x FLow dlow dhigh dlow
x FHigh dlow dhigh dhigh dhigh x W + + + =

where W(x) = 1

The calculation is perform ed for the 57, 58, 59, and 60 th 

### ranked concentrations. The smallest value of x where W( x) is greater than 0.98 by moving up the right hand column until the first number greater than but not equal to 0.98 (0. 983651) is identified. This value, which is the 98 th 

### percentile value, corresponds to the concentration of 64.4 μ g/m 3 

### for Bakersfield-Golden in 2006.

Table A-6 Calculati ng Weighted Percentiles for Two Seasons, 2006, Bakersfield Golden

High Season Seasonal Weight (SW) 0.498630137 Low Season Seasonal Weight (SW) 0.5013699

Rank Concentration (μg/m 3 ) FHigh FLow W(x)

61 76.4 1 1 1
60 75.2 0.98360656 1 0.991826
59 64.4 0.96721311 1 0.983651
58 60.9 0.95081967 1 0.975477
57 58.7 0.93442623 1 First W(x) > 0.98, starting from the lowest ranked, is the 98 th percentileSan Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-8 Calculating the PM2.5 Annual Mean Value

The annual mean value is calculated by determi ning the four quarterly means for a site. First, add all the 24-hour average PM2.5 sa mple concentrations for each calendar quarter of a particular year; then divide by t he number of samples. Then calculate the annual mean from the f our quarterly means. Calculat e the annual means for each of the other two years using the same appr oach above. Then calculate the 3-year average of the annual means. Round the number to the near est tenth and compare to the NAAQS of 15.0 μ g/m 3



### .

The calculation for the PM2. 5 annual mean value for Bakersfield - Planz in 2006 is as follows: First, apply the data completene ss test on the 2006 Bakersfield - Planz measurements. As mentioned in the previous sect ion on calculating the daily 98 th 

### percentile value, Bakersfield - Planz had incomplete data for 2006 2 nd 

### Quarter. Appendix N states that years with high values that don’ t meet the completeness test must still be used when the site has at least 11 samples in each quarter (minimum requirement is 11 samples per quarter for all sampling schedules). For Bakersfield - Planz the 2 nd 

### Quarter in 2006 had 18 samples. Next, average the samples for each quarter in 2006 and round the value to the nearest tenth, 19.3 μ g/m 3 

### . These values also appear in Table A-7. Follow the same procedure above for calculating the 2004 (17.4 μ g/m 3 

### ) and 2005 (19.9 μ g/m 3 

### ) annual mean values. Then average the 2004 through 2006 annual mean values and round the value to the nearest tenth, 18.9 μ g/m 3



### . Then compare 18.9 μ g/m 3 

### to the PM2.5 annual mean NAAQS of 15.0 μ g/m 3 

### . 18.9 μ g/m 3 

### is higher than the PM2.5 annual mean NAAQS and is non-attainment. Even though the 2 nd 

### Quarter 2006 had incomplete data at this site, the annual mean is still considered valid. No data substitution occu rred to fill in for missing data to perform the annual mean PM2.5 calculation.

Table A-7 Quarterly Averages, 2006 Bakersfield - Planz PM2.5 Values

Quarter Average concentrations ( μ g/m 3 

### ) 1 st 

### Quarter 18.17931 2 nd 

### Quarter 12.12778 3 rd 

### Quarter 19.5 4 th 

### Quarter 27.588 Annual Average 19.3San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-9 A.3.4 Data Va lidity Flags

Some of the measured values in the dataset were marked with a data validity flag. A data validity flag is used to mark data for sp ecific reasons. The following procedures were considered when handling the data va lidity flags while performing the PM2.5 calculations:

1. All data points (values with no codes, capital and lower case validity flags) were used in determining completeness. 2. Data associated with capital letter validity codes were not used in actual attainment calculations. 3. Lower case and numeric “1” validity c odes were used to determine completeness and calculate attainment values. 4. The data with the numeric validity “5” code, meaning “outlier, cause unknown” was not used in the actual calculations but only to be counted toward completeness.

The District downloaded the official PM2. 5 24-hour averages from EPA on March 21, 2007. On May 7, 2007, the District was in formed by ARB that some invalid data collected from October 16, 2005 through Novem ber 6, 2005 (8 samples) from the Clovis air-monitoring site remained in the official EPA database. The District took action to remove this data, and the data is no longer in the database. These data were excluded in attainment calculations. Overall, t here were 349 samples collected Valley-wide that had a data validity flag applied to the sample. The complete set of data including data with data validity flags for 2004-2006 is shown in Table A-13 at the end of this appendix.

A.4 DATA ANALYSIS, 1999-2006

As required by EPA, the PM2.5 monito ring was underway nation-wide beginning in 1999. Table A-8 summarizes the PM2.5 98t h percentile value for currently operating PM2.5 monitoring sites in the San Joaquin Va lley Air Basin (SJVAB) for the years 1999- 2006. The calculation of t he PM2.5 24-hour 98th percentile concentration is explained in Section A.3 of this Appen dix. Table A-9 shows the 24- hour PM2.5 3-year average of the 98th percentile value for each site withi n the SJVAB for the years 1999-2006. A dash (-) indicates that there is insufficient (o r no) data available to determine the value. Table A-10 summarizes the PM2.5 annual val ues for currently operating sites in the SJVAB for the years 1999-2006. The calculat ion of the annual PM2. 5 concentration is also explained in Section A.3 of this Appe ndix. Table A-11 shows the PM2.5 3-year average annual mean values for each site within the SJVAB for the years 1999-2006.

Current attainment status is dete rmined for each site by analyzing PM2.5 measurements 2 

### from 2004 through 2006. If any m onitoring site within the SJVAB has

2 40 CFR (Code of Federal Regulations) Part 50, Appendix N require that attainment calculations be based on at least the most recent three complete years of quality reviewed data.San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-10 both a 3-year average 98th perc entile 24-hour PM2.5 design va lue that is greater than 65 μ g/m 3 

### and a 3-year annual mean PM2.5 design va lue that is greater than 15.0 μ g/m 3 

### , then the entire air basin is designated nonattainment 3 

### . Table A-12 summarizes the current attainment status on a site-by-site basis. Bold values indicate values over the National Ambient Air Qua lity Standard (NAAQS). Table A-12 shows that three of the 11 air monitoring sites (Stockton, Mode sto, and Merced) in the SJVAB currently meet the attainment test for PM2.5. Eight out of 11 sites are nonattainment for the PM2.5 standard for the 2004-2006 ti me period, and three of the sites attain the PM2.5 NAAQS. This is an impr ovement from the 1999-2001 period, when all sites were nonattainment 4



### . Figures A-1 through A-11 s how the 3-year average 98 th 

### percentile 24-hour average PM2.5 concentrations for each San Joaquin Va lley air monitoring site. Figures A-12 through A-22 show the 3-year annual mean design values for 1999-2006. The years stated on the x-axis in Figures A-1 through A-22 represent the end y ear of the 3-year averaging period. Figure A- 23 and Figure A-24 illustrates the San Joaquin Valley air basin map as a bubble chart with 3-year average 98 th 

### percentile 24 hour average from the year 2002 and 2006, respectively. Fi gure A-25 and Figure A-26 shows the San Joaquin Valley air basin map as a bubble ch art with 3-year annual mean PM2.5 design values depicted on a site-by-site basis from the year 2002 and 2006, respectively. Figures A-23 and A-24 depict an improvement of the PM2.5 air qua lity from 2002 to 2006. More air quality tr end data can be found at < http://www.arb.ca.gov >.

A.5 TREND AND SPATIAL VARIATIONS

A.5.1 Local Trends

While the peak San Joaquin Valley design value site trend (Bakersfield - Planz) remains essentially unchanged, a majori ty of the sites are improv ing. Ten of the 11 air monitoring sites in the SJVAB are showing an improving air qualit y trend: Stockton, Modesto, Merced, Fresno-1 st 

### , Fresno-Winery, Clovis, Corcoran, Visalia, BakersfieldCalifornia, and Bakersfield-Golden. Tables A-8 through A-11 show PM2.5 averages from 1999-2006. Table A-12 shows the attain ment status for each SJV site based on 2004-2006 data. Figures A-2 th rough A-22 show improving trends. The degree of the improvement of the trend vari es from essentially unchanged at Bakersfield-Planz (Figure A-3) to downward at Visalia -Church (Figure A-15).

3 Under the 1997 PM2.5 standard, the st andard upon which this plan is based.
4 Please note that Fresno-1 st had incomplete data for 2001 for the annual mean calculation. However, based on the years before and after, the annual mean value w ould have been above the NAAQS in 2001.San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-11 Table A-8 24-hour PM2.5 98 th 

### percentile values ( μ g/m 3 

### ), 1999-2006

Site 1999 2000 2001 2002 2003 2004 2005 2006 Stockton 79.0 55.0 58.0 50.0 41.0 36.0 44.0 42.0
Modesto 95.0 71.0 64.0 64.0 47.0 45.0 55.0 52.0 Merced ** 80.3 ** 55.1 44.2 43.0 48.3 43.8
Fresno-1st 119.0 89.0 67.0 75.0 55.0 52.0 71.0 51.0 Fresno-Winery * 64.8 61.5 71.9 49.7 49.4 71.2 55.0 Clovis 59.2 72.5 71.5 53.2 ** 42.4 77.0 51.3 Corcoran   89.5 65.1 42.2 49.4 74.5 50.1
Visalia 114.0 103.0 96.0 53.0 47.0 54.0 65.0 50.0 Bakersfield-Golden 95.3 85.6 86.1 80.4 51.9 53.8 74.9 64.4 Bakersfield-California **  88.8 94.9 66.8 85.7 63.1 63.6 60.5 Bakersfield-Planz * ** 90.6 66.8 47.5 78.6 66.4 50.6

* Monitor not in operation.

** Does not meet the requirement for the 50% of the observations in each quarter. Can't calculate the 98th percentile through substitution.

Derived value via data substitution.

Valid data, but does not meet the 75% data completeness test.

98th percentile value changed due to flagged data.



### Table A-9 3-year average of the 24-hour PM2.5 98 th 

### percentile values ( μ g / m 3 

### )

Site 1999- 2001 2000- 2002 2001- 2003 2002- 2004 2003- 2005 2004- 2006 Stockton 64 54 50 42 40 41
Modesto 77 66 58 52 49 51
Merced - - - 47 45 45
Fresno-1st - - 66 61 59 58 Fresno-Winery - 66 61 57 57 59 Clovis 68 66 - - - 57 Corcoran - - 66 52 55 58
Visalia 104 84 65 51 55 56 Bakersfield-Golden 89 84 73 62 60 64 Bakersfield-California - 84 82 72 71 62 Bakersfield-Planz - - 68 64 64 65

Valid but does not meet the 75% data completeness test.

- A dash indicates that there is insufficient data available to determine the average value.San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-12 Table A-10 Annual mean PM2.5 value concentrations ( μ g/m 3 

### )

Site 1999 2000 2001 2002 2003 2004 2005 2006 Stockton 19.8 16.8 13.8 16.7 13.4 13.2 12.5 13.1
Modesto 24.4 18.7 17.0 18.4 14.5 13.6 13.9 14.8
Merced 16.7 16.6 18.7 15.5 15.3 14.1 14.8
Fresno-1st 26.9 19.1 21.0 17.6 16.4 16.9 16.8 Fresno-Winery 18.6 18.7 21.4 17.8 17.0 16.9 17.6 Clovis 19.8 16.3 18.2 16.2 15.8 16.0 16.8 Corcoran 16.2 19.2 21.5 16.2 17.3 17.6 16.7
Visalia 27.6 23.7 22.5 19.4 18.2 17.0 18.8 18.8 Bakersfield-Golden 26.2 21.7 19.8 24.2 19.6 18.1 18.9 18.6 Bakersfield-California 22.5 22.1 21.7 23.4 16.9 19.0 17.9 18.7 Bakersfield-Planz 20.3 23.9 23.7 17.8 17.4 19.9 19.3

Annual average considered valid (each quarter has more than 11 samples), but does not meet the 75% completeness requirement.

Does not meet the requirement for 50% of the observations in a quarter.



### Table A-11 3-year average of the annual mean PM2.5 values ( μ g/m 3 

### )

Site 1999 - 2001 2000- 2002 2001- 2003 2002- 2004 2003- 2005 2004- 2006 Stockton 16.8 15.8 14.6 14.4 13.0 12.9
Modesto 20.0 18.0 16.6 15.5 14.0 14.1
Merced - 17.3 16.9 16.5 15.0 14.7 Fresno-1st - - 19.3 18.3 17.0 16.7 Fresno-Winery - 19.6 19.3 18.7 17.2 17.2 Clovis 18.1 16.9 - - - 16.2 Corcoran - 19.0 19.0 18.3 17.0 17.2
Visalia 24.6 21.9 20.1 18.2 18.0 18.2 Bakersfield-Golden 22.6 21.9 21.2 20.6 18.9 18.5 Bakersfield-California 22.1 22.4 20.7 19.8 17.9 18.5 Bakersfield-Planz - 22.6 21.8 19.6 18.4 18.9

Annual average considered valid (each quarter has more than 11 samples), but does not meet the 75% completeness requirement.

- A dash indicates that there is insufficient data available to determine the value.San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-13

Table A-12 Current (2004 – 2006) PM2.5 ai r quality design values and attainment status for the San Joaquin Valley Air Basin

Attainment Tests

Monitoring Station Three -Year Average 98 th Percentile 24 hr. ( μ g / m 3 )* Three - Year Annual Average ( μ g / m 3 ) Attainment Status**
Stockton 41 12.9 Yes
Modesto 51 14.1 Yes
Merced 45 14.7 Yes
Fresno-1st 58 16.7 No Fresno-Winery 59 17.2 No Clovis 57 16.2 No Corcoran 58 17.2 No
Visalia 56 18.2 No Bakersfield-Golden 64 18.5 No Bakersfield-California 62 18.5 No Bakersfield-Planz 65 18.9 No

* First, average the 4 quarterly values for ea ch of three years, then next average those three values to obtain the three-year average.

** A station is considered in attainment if the three- year average 98 th percentile 24-hour PM 2.5 concentration is less than or equal to 65 μ g / m 3 and the three year average annual PM 2.5 concentration is less than or equal to 15.0 μ g / m 3

.

Bold is considered nonattainment.San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-14 Figure A-1 Bakersfield - Planz 3-year average 98 th 

### percentile 24-hour average PM2.5 concentrations from 2001 (1999- 2001 average) to 2006 (2004-2006 average)

0 20 40 60 80 100 120

2001 2002 2003 2004 2005 20063 - Year Average PM2.598thPercentile Value (μg / m3)

PM 2.5 NAAQS of 65 μ g / m 3



### Figure A-2 Bakersfield - California 3-year average 98 th 

### percentile 24-hour average PM2.5 concentrations from 2001 (1999- 2001 average) to 2006 (2004-2006 average)

0 20 40 60 80 100 120

2001 2002 2003 2004 2005 20063 - Year Average PM2.598thPercentile Value (μg / m3)

PM 2.5 NAAQS of 65 μ g / m 3

micrograms / m 3San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-15 Figure A-3 Bakersfield - Golden 3-year average 98 th 

### percentile 24-hour average PM2.5 concentrations from 2001 (1999- 2001 average) to 2006 (2004-2006 average)

0 20 40 60 80 100 120

2001 2002 2003 2004 2005 20063 - Year Average PM2.598thPercentile Value (μg / m3)

PM 2.5 NAAQS of 65 μ g / m 3



### Figure A-4 Visalia 3-year average 98 th 

### percentile 24-hour average PM2.5 concentrations from 2001 (1999- 2001 average) to 2006 (2004-2006 average)

0 20 40 60 80 100 120

2001 2002 2003 2004 2005 20063 - Year Average PM2.598thPercentile Value (μg / m3)

PM 2.5 NAAQS of 65 μ g / m 3San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-16 Figure A-5 Corcoran 3-year average 98 th 

### percentile 24-hour average PM2.5 concentrations from 2001 (1999- 2001 average) to 2006 (2004-2006 average)

0 20 40 60 80 100 120

2001 2002 2003 2004 2005 20063 - Year Average PM2.598thPercentile Value (μg / m3)

PM 2.5 NAAQS of 65 μ g / m 3



### Figure A-6 Fresno-Winery 3-year average 98 th 

### percentile 24-hour average PM2.5 concentrations from 2001 (1999- 2001 average) to 2006 (2004-2006 average)

0 20 40 60 80 100 120

2001 2002 2003 2004 2005 20063 - Year Average PM2.598thPercentile Value (μg / m3)

PM 2.5 NAAQS of 65 μ g / m 3San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-17 Figure A-7 Fresno-1st 3-year average 98 th 

### percentile 24-hour average PM2.5 concentrations from 2001 (1999- 2001 average) to 2006 (2004-2006 average)

0 20 40 60 80 100 120

2001 2002 2003 2004 2005 20063 - Year Average PM2.598thPercentile Value (μg / m3)

PM 2.5 NAAQS of 65 μ g / m 3



### Figure A-8 Clovis 3-year average 98 th 

### Percentile 24-hour average PM2.5 concentrations

0 20 40 60 80 100 120

2001 2002 2003 2004 2005 20063 - Year Average PM2.598thPercentile Value (μg / m3 )

PM 2.5 NAAQS of 65 μ g / m 3San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-18 Figure A-9 Merced - M St reet 3-year average 98 th 

### percentile 24-hour average PM2.5 concentrations from 1999 to 2006

0 20 40 60 80 100 120

2001 2002 2003 2004 2005 20063 - Year Average PM2.598thPercentile Value (μg / m3)

PM 2.5 NAAQS of 65 μ g / m 3



### Figure A-10 Modesto 3-year average 98 th 

### percentile 24-hour average PM2.5 concentrations from 1999 to 2006

0 20 40 60 80 100 120

2001 2002 2003 2004 2005 20063 - Year Average PM2.598thPercentile Value (μg / m3)

PM 2.5 NAAQS of 65 μ g / m 3San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-19 Figure A-11 Stockton 3-year average 98 th 

### percentile 24-hour average PM2.5 concentrations from 1999 to 2006

0 20 40 60 80 100 120

2001 2002 2003 2004 2005 20063 - Year Average PM2.598thPercentile Value (μg / m3)

PM 2.5 NAAQS of 65 μ g / m 3



### Figure A-12 Bakersfield - Planz 3-year average PM2.5 annual mean value from 1999 to 2006

10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0

2001 2002 2003 2004 2005 20063 - Year Average Annual Mean Value (μg / m3)

PM 2.5 NAAQS of 15.0 μ g / m 3San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-20 Figure A-13 Bakersfield - California 3-y ear average PM2.5 annual mean value from 1999 to 2006

10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0

2001 2002 2003 2004 2005 20063 - Year Average Annual Mean Value (μg / m3)

PM 2.5 NAAQS of 15.0 μ g / m 3



### Figure A-14 Bakersfield - Golden 3-year average PM2.5 annual mean value from 1999 to 2006

10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0

2001 2002 2003 2004 2005 20063 - Year Average Annual Mean Value (μg / m3)

PM 2.5 NAAQS of 15.0 μ g / m 3San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-21 Figure A-15 Visalia 3-year average PM2.5 annual mean value from 1999 to 2006

10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0

2001 2002 2003 2004 2005 20063 - Year Average Annual Mean Value (μg / m3)

PM 2.5 NAAQS of 15.0 μ g / m 3



### Figure A-16 Corcoran 3-year average PM2. 5 annual mean value from 1999 to 2006

10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0

2001 2002 2003 2004 2005 20063 - Year Average Annual Mean Value (μg / m3)

PM 2.5 NAAQS of 15.0 μ g / m 3San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-22 Figure A-17 Fresno-Winery 3-year average PM 2.5 annual mean value from 1999 to 2006

10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0

2001 2002 2003 2004 2005 20063 - Year Average Annual Mean Value (μg / m3)

PM 2.5 NAAQS of 15.0 μ g / m 3



### Figure A-18 Fresno-1 st 

### 3-year average PM2.5 annual mean value from 1999 to 2006

10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0

2001 2002 2003 2004 2005 20063 - Year Average Annual Mean Value (μg / m3)

PM 2.5 NAAQS of 15.0 μ g / m 3San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-23 Figure A-19 Clovis 3-year average PM2.5 annual mean value from 1999 to 2006

10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0

2001 2002 2003 2004 2005 20063 - Year Average Annual Mean Value (μg / m3)

PM 2.5 NAAQS of 15.0 μ g / m 3



### Figure A-20 Merced M Street 3-year average PM2.5 annual mean value from 1999 to 2006

10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0

2001 2002 2003 2004 2005 20063 - Year Average Annual Mean Value (μg / m3)

PM 2.5 NAAQS of 15.0 μ g / m 3San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-24 Figure A-21 Modesto - 14 th 

### 3-year average PM2.5 annual mean value from 1999 to 2006

10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0

2001 2002 2003 2004 2005 20063 - Year Average Annual Mean Value (μg / m3)

PM 2.5 NAAQS of 15.0 μ g / m 3



### Figure A-22 Stockton - Hazelton 3-year average PM2.5 annual mean value from 1999 to 2006

10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0

2001 2002 2003 2004 2005 20063 - Year Average Annual Mean Value (μg / m3)

PM 2.5 NAAQS of 15.0 μ g / m 3San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-25 Figure A-23 PM2.5 24-hour Design Value Comparison, 2002 and 2006San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-26 Figure A-24 PM2.5 Annual Mean Desi gn Value Comparison, 2002 and 2006San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-27 A.6 RESULTS USING PRELIMINARY 2007 REAL-TIME 24- HOUR PM2.5 DATA

The District used real-time non-Federal Re ference Method BAM data to calculate preliminary 2007 24-hour PM2.5 98 th 

### percentile values and the three-year (2005 through 2007) 24-hour average 98 th 

### percentile values. The data used in this calculation is preliminary and is subject to change.

Air quality meets the 24-hour PM2.5 standard when the average of the annual 98 th 

### percentile PM2.5 value is less than or equal to 65 μ g/m 3 

### at each monitoring site. “Daily value” for PM refers to the 24-hour average concent ration of PM calculated or measured from midnight to midnight local standard time for PM2.5. Average and mean refer to an arithmetic mean. The dat a completeness test is performed for each site prior to calculating the 98 th 

### Percentile and Annual Mean PM2.5 values to ensure that each site has enough values to be compar ed to the NAAQS. A site meets the data completeness test when at least 75% of the scheduled sampling days for each quarter have valid data. All sites in 2007 meet data completeness requirements using real-time non-Federal Reference Method BAM data.

According to the preliminary real-time 2007 non-Federal Reference Method BAM data, all San Joaquin Valley (SJV) air monito ring sites meet the 24 hour “1997” PM2.5 NAAQS (Table A-13) except Clovis, Bakersfi eld-Golden, and Bakersfield-California. Once the official 2007 Federal Reference Method PM2.5 data is available, typically no earlier than July 1 st 

### , 2008, the District will perform the necessary 24-hour and annual PM2.5 attainment calculations and determine the designation status.

Table A-13 24 - hour PM2.5 98 th 

### percentile values ( μ g / m 3 

### ). 2007 data is considered preliminary.

SJV SITE 2005 2006 2007* AVG. 05-07 Stockton 44.0 42.0 50.0 45 Tracy § § 39.0 § Modesto 55.0 52.0 64.0 57 Turlock § § 58.0 § Merced 48.3 43.8 # # Fresno-1st 71.0 51.0 70.0 64 Fresno-Winery 71.2 55.0 # # Clovis 77.0 51.3 72.0 67 Corcoran 74.5 50.1 67.0 64 Visalia 65.0 50.0 67.0 61 Bakersfield-Golden 74.9 64.4 74.0 71 Bakersfield-California 63.6 60.5 77.0 67 Bakersfield-Planz 66.4 50.6 # #

Derived value via data substitution. * - 2007 PM2.5 data is from a BAM which is considered preliminary and subject to change. § - Federal Reference Method monitors are not located at these sites. # - Real time data is not available.San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-28 Table 14 Complete Air Quality Data, 2004-2006San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-29San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-30San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-31San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-32San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-33San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-34San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-35San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-36San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-37San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-38San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-39San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-40San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-41San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-42San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-43San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-44San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-45San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-46San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-47San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-48San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-49San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-50San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-51San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-52San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-53San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-54San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-55San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-56San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-57San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-58San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-59San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-60San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-61San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-62San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-63San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-64San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-65San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-66San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-67San Joaquin Valley Unified Air Polluti on Control District April 30, 2008

Appendix A: Ambient Air Quality Data and Analysis 2008 PM2.5 Plan 

### Appendix A-68