### Air Quality Monitoring Network Plan – July 2009

C-1 APPENDIX C



## SOUTH COAST AIR QUALITY MANGEMENT DISTRICT NATIONAL CORE (NCORE) MONITORING NETWORK PLAN

JULY 2009

Prepared by

Rene M. Bermudez Principal Air Quality Instrument Specialist

Philip M. Fine Atmospheric Measurements Manager

### Air Quality Monitoring Network Plan – July 2009

C-2 

## Introduction On October 17 th 

### , 2006 the Environmental Protection Agency (EPA) is sued final amendments to the ambient air monitoring requirements for criteri a pollutants contained in 40 CFR parts 50, 53 and 58. The purpose of the amendments are to enhance ambien t air quality monitoring to better serve current and future air quality management and research needs. The final amendments detail a new ambient air monitoring requirement for states to establish and operate a network of National Core (NCore) multipollutant monitoring sta tions. The South Coast AQMD NCore monitoring network plan includes details for the im plementation of the NCore monitoring locations to be operational by January 1, 2011.



## Public Comments Pursuant to Federal regulations, this plan is to be made available for public inspection and comments for at least 30 days prior to submission t o U.S. EPA. Hard copies of this document were made available on June 1, 2009 at the South Co ast AQMD Public Information Desk in Diamond Bar, CA. The document was also posted to t he public South Coast AQMD website at www.aqmd.gov on June 1, 2009, with links under the South Coast AQMD home page titled “Current Programs, Events and Topics” Links to the document were also provided in the “Air Quality” area of the website. The draft document will also be made available to U.S. EPA during this period for review.


## Monitoring Objectives The goals for NCore multipollutant stations are to track long-term trends of emissions control programs; to support health assessments that contri bute to ongoing reviews of the National Ambient Air Quality Standards (NAAQS); to aid in th e development of emissions control strategies through air quality model evaluation and other observational methods; to support scientific studies ranging across technological, he alth, and atmospheric process disciplines; to support ecosystem assessments; to provide data for use in attainment and non-attainment designations and for public reporting and forecasti ng of the AQI.


## Methodology Methods employed in NCore multipollutant sites used to measure SO 2 

### , CO, NO 2 

### , O 3 

### , and PM 2.5 

### are reference or equivalent method samplers as defi ned in 40 CFR part 58.1 or Approved Regional Method (ARM) samplers as defined in append ix C to part 58 section 2.4. Instruments purchased by South Coast AQMD for use at NCore stat ions are included in Table 1.


## Monitoring Requirements NCore multipollutant sites measure multiple polluta nts in order to support integrated air quality management data needs. NCore sites include neighbo rhood and urban scale measurements in metropolitan areas and rural areas. Sites are long term and sited away from direct emission sources that could impact the ability to detect are a-wide concentrations. NCore sites for South Coast AQMD are shown in Table 2. Considerations in the site selection process include:

Siting Criteria – Sites selected as NCore stations are urban or rural locations. South Coast AQMD NCore sites are located in urban areas w ith monitors sited at neighborhood scales of representativeness. This provides the le vel of exposure consistent throughout

### Air Quality Monitoring Network Plan – July 2009

C-3 the metropolitan area. Siting specifications for Los Angeles (Main) and Rubidoux stations are detailed in site reports included as a n attachment to appendix C.

Number of Stations –

Each state is required to operate at least one NCo re site. States such as California with multiple MSAs are required to identify one or two additional NCore sites in order to account for their unique si tuation. EPA guidance states that NCore stations should, when possible, be collocated with other multipollutant stations including Photochemical Assessment Monitoring Stati ons (PAMS), National Air Toxics Trends Stations (NATTS), and Speciation Trends Netw ork (STN) sites to utilize the same monitoring platform and equipment to meet the objec tives of multiple programs. The South Coast AQMD NCore monitoring network stations are to be located at Los Angeles (Main) and Rubidoux air monitoring sites. Selectio n of Los Angeles (Main) and Rubidoux sites for NCore stations will meet the EPA goal of collocation among multipollutant stations such as PAMS, NATTS, and ST N. Site reports for both the Los Angeles (Main) and Rubidoux stations are included a s an attachment to appendix C.

Measurements – EPA ambient air monitoring requirements specify tha t NCore stations must measure PM 2.5 

### particle mass using continuous and integrated filt er based samplers, speciated PM 2.5 

### , PM 10-2.5 

### (coarse) mass, speciated PM 10-2.5 

### mass, O 3 

### , trace-level SO 2 

### , trace-level CO, NO/NO y 

### , wind speed and direction, relative humidity and a mbient temperature. In addition to the previous requireme nts, the ten most populated MSA/CSA in each EPA region must measure lead (Pb) at the sa me site or elsewhere in the MSA/CSA boundary. South Coast AQMD currently meets the requirement for PM 2.5 

### , O 3 

### , wind speed and direction, relative humidity and a mbient temperature at both the Los Angeles (Main) and Rubidoux stations. NO y 

### and trace level CO and SO 2 

### monitors have been purchased and are currently undergoing accepta nce testing with installation planned during fiscal year (FY) 2009-10. Equipment purchas es for PM 10-2.5 

### mass and speciation are being delayed in anticipation of possible upcom ing U.S. EPA federal equivalency designations and the prospect of additional funding . South Coast AQMD is committed to acquire and deploy the coarse PM instrumentation pr ior to January 1, 2011 statutory deadline. A comprehensive list of monitors at both the Los Angeles (Main) and Rubidoux stations are included in the site report a s an attachment to appendix C.

Operating schedules – Manual PM 2.5 

### samplers at NCore stations, and required regional background/transport sites must operate at least on a 1:3 day sampling frequency. Sampling frequencies for monitors at Los Angeles (M ain) and Rubidoux are on a daily schedule and included in the site reports attached to appendix C.

During the coming year South Coast AQMD plans to co mplete acceptance testing for trace level CO, SO 2 

### and NO y 

### analyzers. Once competed, analyzers are to be ins talled at the Los Angeles (Main) and Rubidoux NCore stations during FY 2009-1 0. Additional supporting equipment to be purchased during FY 2009-10 includes zero air ge nerators and data loggers with digital capabilities.

### Air Quality Monitoring Network Plan – July 2009

C-4 TABLE 1 New NCore Monitors

Monitor Type Model\Manufacturer Designation Analysis Method Sampling frequency Trace-level CO Teledyne API

300EU NCore Non-dispersive Infrared (NDIR) Continuous

NO/NOy Thermo Scientific

42iy NCore Chemiluminescence Continuous

Trace-level SO2 Thermo Scientific

43i-TLE NCore Pulsed Fluorescence SO2 Analyzer Continuous

TABLE 2 NCore Monitoring Locations

Station AQS Monitors Programs Los Angeles 1 

### (Main) 060371103 CO,NO2,SO2,O3,PM10,Pb,PM2.5,SO 4 

### NCORE, PAMS, NATTS, STN

Rubidoux 1 

### 060658001 CO,NO2,SO2,O3,PM10,Pb,PM2.5,SO4 NCORE, PAMS, NATTS, STN

1 – New PAMS sites to begin July 1 st , 2009

### Air Quality Monitoring Network Plan – July 2009

C-5 

## South Coast AQMD Site Survey Report for Los Angeles-North Main Stree t Last updated March 2009

AIRS Number ARB Number Site Start Date Reporting Agency and Agency Code
060371103 70087 09/79 

### South Coast AQMD (061)
Site Address County Air Basin Latitude Longitude El evation 1630 North Main Street Los Angeles, CA 90012 

### Los Angeles South Coast 34° 03' 59" 118° 13' 36" 89

### Air Quality Monitoring Network Plan – July 2009

C-6

### Air Quality Monitoring Network Plan – July 2009

C-7 

# Site Survey Report

Siting Information

Site Name: Los Angeles- North Main Street Date: 03/10/09 State Code: 70087 AIRS Number: 060371103

Latitude: 34° 03' 59" Longitude: 118° 13' 36" Elevation (m): 89 Address: 1630 North Main St Los Angeles, CA 90012 Senior AQIS: Albert Dietrich Site Technician: Carl Thompson Site Phone: (323) 225-0178

Operating Agency: South Coast AQMD 

## General Siting Conditions

Station Temperature Traffic Topography Predominant Wind Direction: W

Controlled: Yes Description: Commercial Sit e: Level Arc Air Flow (Deg): 360 Degrees

Recorded: Yes Distance: 40 meters Region: Level Probe Last Cleaned: 05/12/09

Count (Veh/Day): 10000 QA Manual Manifold Clean: Yes

Meteorology Non-vehicular Local Sources Approved: Yes Cleaning Schedule: 6 Months

Located With Instruments: Yes Description: None Agency: South Coast AQMD Autocalibrator Type: Environics 9100

Distance: N/A Urbanization: Suburban Site Survey Complete: Yes

Direction: N/A Ground Cover: Asphalt Logbo ok Up To Date: Yes



## Action Items

Comments

### Air Quality Monitoring Network Plan – July 2009

C-8 

# Detailed Site Information

Site Name Los Angeles-North Main Street AQS ID (AIRS #) 060371103 GIS coordinates Latitude: 34° 03’ 59” Longitude: 11 8° 13’ 36” Location DWP General Warehouse Building Address 1630 North Main Street, Los Angeles, CA 900 12 County Los Angeles Dist. to road 40 meters Traffic count 10,000 veh/day Groundcover Asphalt PEP audit? 05/19/09 NPAP audit? 07/22/08 Flow audit? 07/22/08 Representative Area 31100-Los Angeles, Long Beach-S anta Ana, CA MSA Pollutant Carbon Monoxide Nitrogen Dioxide Ozone Su lfur Dioxide Monitor obj REPRESENTATIVE CONCENTRATION HIGHEST CONCENTRATION REPRESENTATIVE CONCENTRATION REPRESENTATIVE CONCENTRATION Spatial scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Sampling method Horiba APMA-360 42i API/Teledyne 40 0E TECO 43i-TLE Serial # 576876073 CM 08360037 520-S 0831832126 Property # 0016214 16730 N/A 16746 Last Calibration Date 03/10/09 03/03/09 12/12/08 02 /10/09 Analysis method N/A N/A N/A N/A Start date 03/79 03/79 03/79 03/79 Operation schedule 1:1 1:1 1:1 1:1 Sampling season All Year All Year All Year All Year Probe height 12.3 12.3 12.3 12.3 Distance from supporting structure 2.0 2.0 2.0 2.0

Distance from obstructions on roof N/A N/A N/A N/A

Distance from obstructions not on roof N/A N/A N/A N/A

Distance from trees N/A N/A N/A N/A Distance to furnace or incinerator flue N/A N/A N/A N/A

Distance between collocated monitors N/A N/A N/A N/A

Unrestricted airflow Yes Yes Yes Yes Probe material Teflon Teflon Teflon Teflon Residence time 7.2 7.6 8.1 9.5 Will there be changes within the next 18 months? No No No No

Is it suitable for comparison against the annual PM2.5? N/A N/A N/A N/A

Frequency of flow rate verification for manual PM samplers audit N/A N/A N/A N/A

### Air Quality Monitoring Network Plan – July 2009

C-9 Frequency of flow rate verification for automated PM analyzers audit N/A N/A N/A N/A

Frequency of onepoint QC check (gaseous) Nightly Nightly Nightly Nightly

Last Annual Performance Evaluation (gaseous) 07/17/08 02/25/09 07/13/08 02/05/09

Last two semi-annual flow rate audits for PM monitors N/A N/A N/A N/A

Pollutant PM10-SSI – A PM10-SSI (Natts) – B TSP (Le ad) – B TSP (Lead) – A Monitor obj REPRESENTATIVE CONCENTRATION REPRESENTATIVE CONCENTRATION REPRESENTATIVE CONCENTRATION REPRESENTATIVE CONCENTRATION Spatial scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Sampling method T300-310 Tisch 300-310 Tisch 300-31 0 Tisch 300-310 Serial # 0516 0432 0568 0567 Property # 4935 50461 1573 4967 Last Calibration Date 03/27/09 06/04/08 03/27/09 03 /27/09 Analysis method Weighed by SCAQMD lab Weighed by SCAQMD lab Weighed by SCAQMD lab Weighed by SCAQMD lab Start date 03/79 01/07 03/79 03/79 Operation schedule 1:6 6 per Year 1:6 1:6 Sampling season All Year All Year All Year All Year Probe height 11.7 11.7 11.3 11.3 Distance from supporting structure 1.5 1.5 1.1 1.1

Distance from obstructions on roof N/A N/A N/A N/A

Distance from obstructions not on roof N/A N/A N/A N/A

Distance from trees N/A N/A N/A N/A Distance to furnace or incinerator flue N/A N/A N/A N/A

Distance between collocated monitors 2 2 2 2

Unrestricted airflow Yes Yes Yes Yes Probe material N/A N/A N/A N/A Residence time N/A N/A N/A N/A Will there be changes within the next 18 months? No No No No

Is it suitable for comparison against the annual PM2.5? N/A N/A N/A N/A

Frequency of flow rate verification for manual PM samplers audit Monthly Monthly N/A N/A

### Air Quality Monitoring Network Plan – July 2009

C-10 Frequency of flow rate verification for automated PM analyzers audit N/A N/A N/A N/A

Frequency of onepoint QC check (gaseous) N/A N/A N/A N/A

Last Annual Performance Evaluation (gaseous) N/A N/A N/A N/A

Last two semi-annual flow rate audits for PM monitors 05/11/09 05/11/09 N/A N/A

Pollutant PM10 BAM BAM-PM2.5 SASS 2.5 SASS 2.5 Monitor obj REPRESNTATIVE CONCENTRATION HIGHEST CONCENTRATION HIGHEST CONCENTRATION HIGHEST CONCENTRATION Spatial scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Sampling method Andersen PM10 BAM MetOne BAM 1020 MetOne SASS MetOne SASS

Serial # 97 F8025 D8051 C4157 Property # 10590 164836 (USC) E000289 E000229 Last Calibration Date 04/18/08 12/04/08 01/06/09 07 /14/08 Analysis method N/A N/A Analyzed by SCAQMD lab Analyzed by SCAQMD lab Start date 05/01/03 12/04/08 12/10/08 02/07 Operation schedule 1:1 1:1 1:3 1:6 Sampling season All Year All Year All Year All Year Probe height 12.0 12.8 12.0 12.0 Distance from supporting structure 1.8 2.6 1.8 1.8

Distance from obstructions on roof N/A N/A N/A N/A

Distance from obstructions not on roof N/A N/A N/A N/A

Distance from trees N/A N/A N/A N/A Distance to furnace or incinerator flue N/A N/A N/A N/A

Distance between collocated monitors 2 2 2 2

Unrestricted airflow Yes Yes Yes Yes Probe material N/A N/A N/A N/A Residence time N/A N/A N/A N/A Will there be changes within the next 18 months? No No No No

Is it suitable for comparison against the annual PM2.5? N/A Yes N/A N/A

Frequency of flow rate verification for manual PM samplers audit N/A N/A Monthly Monthly

### Air Quality Monitoring Network Plan – July 2009

C-11 Frequency of flow rate verification for automated PM analyzers audit Monthly Bi-Weekly N/A N/A

Frequency of onepoint QC check (gaseous) N/A N/A N/A N/A

Last Annual Performance Evaluation (gaseous) N/A N/A N/A N/A

Last two semi-annual flow rate audits for PM monitors 04/18/08 N/A 04/18/08 04/18/08

Pollutant SASS PM2.5 (EPA STN) PM2.5 PM2.5 Xontech 910A (Natts)

Monitor obj REPRESENTATIVE CONCENTRATION REPRESENTATIVE CONCENTRATION REPRESENTATIVE CONCENTRATION REPRESENTATIVE CONCENTRATION Spatial scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Sampling method MetOne SASS Andersen RAAS 2.5 Andersen RAAS 2.5 Xontech 910A

Serial # A6186 305 347 4687 Property # N/A E000005 E000006 E000173 Last Calibration Date 03/27/09 12/23/08 04/14/09 02 /11/09 Analysis method EPA STN Weighed by SCAQMD lab Weighed by SCAQMD lab Analyzed by SCAQMD lab Start date 03/07/07 01/99 01/99 01/07 Operation schedule 1:6 1:1 1:6 1:6 Sampling season All Year All Year All Year All Year Probe height 12.0 12.1 12.1 12.6 Distance from supporting structure 1.8 1.9 1.9 2.3

Distance from obstructions on roof N/A N/A N/A N/A

Distance from obstructions not on roof N/A N/A N/A N/A

Distance from trees N/A N/A N/A N/A Distance to furnace or incinerator flue N/A N/A N/A N/A

Distance between collocated monitors 2 2 2 2

Unrestricted airflow Yes Yes Yes Yes Probe material N/A N/A N/A SS Residence time N/A N/A N/A 5.7 / 2.7 Will there be changes within the next 18 months? No No No No

Is it suitable for comparison against the annual PM2.5? N/A Yes Yes N/A

### Air Quality Monitoring Network Plan – July 2009

C-12 Frequency of flow rate verification for manual PM samplers audit Monthly Monthly Monthly N/A

Frequency of flow rate verification for automated PM analyzers audit N/A N/A N/A N/A

Frequency of onepoint QC check (gaseous) N/A N/A N/A N/A

Last Annual Performance Evaluation (gaseous) N/A 05/11/09 05/11/09 N/A

Last two semi-annual flow rate audits for PM monitors 04/18/08 12/08 12/08 N/A

Pollutant Xontech 910B (Natts) Xontech 920 (NATTS) Xontech 920 (NATTS) PUF (Natts)

Monitor obj REPRESENTATIVE CONCENTRATION REPRESENTATIVE CONCENTRATION REPRESENTATIVE CONCENTRATION REPRESENTATIVE CONCENTRATION Spatial scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Sampling method Xontech 910A Xontech 920 Xontech 92 0 Tisch Puf Serial # 3634 146 156 007 Property # 14392 15466 N/A 50493 Last Calibration Date 01/02/09 02/11/09 02/12/09 02 /11/09 Analysis method Analyzed by SCAQMD lab Analyzed by SCAQMD lab Analyzed by SCAQMD lab Weighed by SCAQMD lab Start date 01/07 01/07 01/07 11/19/04 Operation schedule 6 / Year 1:6 6 / Year 1:6 Sampling season All Year All Year All Year All Year Probe height 12.6 11.5 11.5 11.3 Distance from supporting structure 2.3 1.3 1.3 1.1

Distance from obstructions on roof N/A N/A N/A N/A

Distance from obstructions not on roof N/A N/A N/A N/A

Distance from trees N/A N/A N/A N/A Distance to furnace or incinerator flue N/A N/A N/A N/A

Distance between collocated monitors 2 2 2 2

Unrestricted airflow Yes Yes Yes Yes Probe material SS N/A N/A N/A Residence time 2.6 N/A N/A N/A Will there be changes within the next 18 months? No No No No

### Air Quality Monitoring Network Plan – July 2009

C-13 Is it suitable for comparison against the annual PM2.5? N/A N/A N/A N/A

Frequency of flow rate verification for manual PM samplers audit N/A N/A N/A N/A

Frequency of flow rate verification for automated PM analyzers audit N/A N/A N/A N/A

Frequency of onepoint QC check (gaseous) N/A N/A N/A N/A

Last Annual Performance Evaluation (gaseous) N/A N/A N/A N/A

Last two semi-annual flow rate audits for PM monitors N/A N/A N/A N/A

Pollutant ARB Toxics ARB Toxics URG 2.5 (EPA STN) Monitor obj REPRESENTATIVE CONCENTRATION REPRESENTATIVE CONCENTRATION REPRESENTATIVE CONCENTRATION Spatial scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Sampling method RM Environmental Systems Inc. 924 RM Environmental Systems Inc. 910PC URG 3000N

Serial # 9241002 6101 3N-B0143 Property # 20021009 (ARB) 20062214 (ARB) N/A Last Calibration Date 04/29/09 N/A 01/20/09 Analysis method Analyzed by CARB lab Analyzed by CARB lab Analyzed by SCAQMD lab Start date 08/07 08/07 03/07/07 Operation schedule 1:12 1:12 1:6 Sampling season All Year All Year All Year Probe height 12.18 12.6 12.3 Distance from supporting structure 1.9 2.3 2.0

Distance from obstructions on roof N/A N/A N/A

Distance from obstructions not on roof N/A N/A N/A

Distance from trees N/A N/A N/A Distance to furnace or incinerator flue N/A N/A N/A

Distance between collocated monitors N/A N/A 2

Unrestricted airflow Yes Yes Yes Probe material Teflon Teflon N/A Residence time N/A N/A N/A

### Air Quality Monitoring Network Plan – July 2009

C-14 Will there be changes within the next 18 months? No No No

Is it suitable for comparison against the annual PM2.5? N/A N/A N/A

Frequency of flow rate verification for manual PM samplers audit N/A N/A Monthly

Frequency of flow rate verification for automated PM analyzers audit N/A N/A N/A

Frequency of onepoint QC check (gaseous) N/A N/A N/A

Last Annual Performance Evaluation (gaseous) N/A N/A N/A

Last two semi-annual flow rate audits for PM monitors N/A N/A N/A

### Air Quality Monitoring Network Plan – July 2009

C-15 

## Los Angeles-North Main Street

Site Photos

Looking North from the probe. Looking East from the probe.

Looking South from the probe. Looking West from the probe.

### Air Quality Monitoring Network Plan – July 2009

C-16 

## Los Angeles-North Main Street Site Photos (Cont.)

Looking at the probe from the North. Looking at the probe from the East.

Looking at the probe from the South. Looking at the probe from the West.

### Air Quality Monitoring Network Plan – July 2009

C-17 

## Quality Assurance Site Survey Report for Riverside-Rubidoux

Last updated March 2009

AIRS Number ARB Number Site Start Date Reporting Agency and Agency Code
060658001 33144 09/72 South Coast AQMD (061)

Site Address County Air Basin Latitude Longitude Elevation
5888 Mission Blvd Riverside, CA 92509 Riverside South Coast 33° 59' 58" 117° 24' 57" 248

### Air Quality Monitoring Network Plan – July 2009

C-18

### Air Quality Monitoring Network Plan – July 2009

C-19 

# Site Survey Report

Siting Information

Site Name: Riverside-Rubidoux Date: 03/10/09 S tate Code: 33144 AIRS Number: 060658001

Latitude: 33° 59' 58" Longitude: 117° 24' 57" Elevation (m): 248 Address: 5888 Mission Blvd Riverside, CA 92509 Senior AQIS: Keith Brown Site Technician: Lil a Enriquez Site Phone: (951) 683-0211

Operating Agency: South Coast AQMD 

## General Siting Conditions

Station Temperature Traffic Topography Predominant Wind Direction: W

Controlled: Yes Description: Residential Si te: Level Arc Air Flow (Deg): 360 Degrees

Recorded: Yes Distance: 25 meters Region: Level Probe Last Cleaned: 04/08

Count (Veh/Day): 10000 QA Manual Manifold Clean: Yes

Meteorology Non-vehicular Local Sources Approved: Yes Cleaning Schedule: 6 Months

Located With Instruments: Yes Description: No ne Agency: South Coast AQMD Autocalibrator Type: Environics 9100

Distance: N/A Urbanization: Rural Site Sur vey Complete: Yes

Direction: N/A Ground Cover: Gravel Logbook Up To Date: Yes



## Action Items

Comments

### Air Quality Monitoring Network Plan – July 2009

C-20 

# Detailed Site Information

Site Name Riverside-Rubidoux AQS ID (AIRS #) 060658001 GIS coordinates Latitude: 33° 59’ 58” Longtitude: 1 17° 24’ 57” Location Vacant Lot Address 5888 Mission Blvd, Riverside, CA 92509 County Riverside Dist. to road 25 meters Traffic count 10,000 veh/day Groundcover Gravel PEP audit? NPAP audit? 12/08 Flow audit? 12/08 Representative Area 40140-Riverside-San Bernardino- Ontario, CA MSA Pollutant PM10-SSI PM10-SSI TEOM PM2.5 (Collocated) (RAAS) Monitor obj HIGHEST CONCENTRATION HIGHEST CONCENTRATION HIGHEST CONCENTRATION HIGHEST CONCENTRATION Spatial scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Sampling method SA 1200 SA 1200 R&P 1400 Andersen 3 00 Serial # N/A N/A 20013773 00112 Property # 4941 4992 ARB Unit E000011 Last Calibration Date 02/03/09 02/03/09 02/10/09 01 /06/09 Analysis method Weighed by SCAQMD lab Weighed by SCAQMD lab N/A Weighed by SCAQMD lab Start date 01/14/97 01/14/97 12/03/04 12/04/98 Operation schedule 1:3 1:6 1:1 1:6 Sampling season All Year All Year All Year All Year Probe height 4.5 4.5 5.0 4.8 Distance from supporting structure 1.6 1.6 1.6 1.6

Distance from obstructions on roof N/A N/A N/A N/A

Distance from obstructions not on roof N/A N/A N/A N/A

Distance from trees N/A N/A N/A N/A Distance to furnace or incinerator flue N/A N/A N/A N/A

Distance between collocated monitors 2.0 2.0 N/A 1.0

Unrestricted airflow Yes Yes Yes Yes Probe material N/A N/A N/A Residence time N/A N/A N/A N/A Will there be changes within the next 18 months? Yes Yes Yes Yes

Is it suitable for comparison against the annual PM2.5? N/A N/A N/A Yes

### Air Quality Monitoring Network Plan – July 2009

C-21 Frequency of flow rate verification for manual PM samplers audit Monthly Monthly N/A Monthly

Frequency of flow rate verification for automated PM analyzers audit N/A N/A Monthly N/A

Frequency of onepoint QC check (gaseous) N/A N/A N/A N/A

Last Annual Performance Evaluation (gaseous) N/A N/A N/A N/A

Last two semi-annual flow rate audits for PM monitors 12/03/08, 05/06/09 12/03/08, 05/06/09 N/A 06/18/08, 12/03/08

Pollutant PM2.5 Xontech 924 PM2.5 SASS PM2.5 SASS Monitor obj HIGHEST CONCENTRATION REPRESENTATIVE CONCENTRATION HIGHEST CONCENTRATION HIGHEST CONCENTRATION Spatial scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Sampling method Andersen 300 RAAS Xontech 924 MetOn e SASS MetOne SASS Serial # 498 20021474 B3802 A5521 Property # N/A ARB Unit E000178 Last Calibration Date 01/06/09 01/04/09 12/31/08 12 /09/08 Analysis method Weighed by SCAQMD lab Weighed by SCAQMD lab Weighed by SCAQMD lab EPA RTP STN

Start date 01/03/99 01/03/99 10/13/04 10/13/04 Operation schedule 1:1 1:12 1:3 1:3 Sampling season All Year All Year All Year All Year Probe height 4.8 3.5 4.8 4.8 Distance from supporting structure 1.6 1.6 1.3 1.6

Distance from obstructions on roof N/A N/A N/A N/A

Distance from obstructions not on roof N/A N/A N/A N/A

Distance from trees N/A N/A N/A N/A Distance to furnace or incinerator flue N/A N/A N/A N/A

Distance between collocated monitors 2.0 N/A 2.0 2.0

Unrestricted airflow Yes Yes Yes Yes Probe material N/A N/A N/A N/A Residence time N/A N/A N/A N/A Will there be changes within the next 18 months? Yes Yes Yes Yes

Is it suitable for comparison against the annual PM2.5? Yes N/A N/A N/A

### Air Quality Monitoring Network Plan – July 2009

C-22 Frequency of flow rate verification for manual PM samplers audit Monthly N/A Monthly Monthly

Frequency of flow rate verification for automated PM analyzers audit N/A N/A N/A N/A

Frequency of onepoint QC check (gaseous) N/A N/A N/A N/A

Last Annual Performance Evaluation (gaseous) N/A N/A N/A N/A

Last two semi-annual flow rate audits for PM monitors 06/18/08, 05/06/09 N/A N/A N/A

Pollutant PM2.5 XONTECH 920 XONTECH 920 Monitor obj HIGHEST CONCENTRATION REPRESENTATIVE CONCENTRATION REPRESENTATIVE CONCENTRATION Spatial scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Sampling method MetOne SASS XONTECH 920 XONTECH 920 Serial # A5525 148 149 Property # 15478 15480 Last Calibration Date 01/08/09 12/04/08 12/05/08 Analysis method EPA RTP STN Weighed by SCAQMD lab Weighed by SCAQMD lab Start date 10/13/04 11/29/07 04/12/04 Operation schedule 1:6 1:6 1:every other month Sampling season All Year All Year Probe height 4.8 4.8 4.8 Distance from supporting structure 1.6 1.6 1.6

Distance from obstructions on roof N/A N/A N/A

Distance from obstructions not on roof N/A N/A N/A

Distance from trees N/A N/A N/A Distance to furnace or incinerator flue N/A N/A N/A

Distance between collocated monitors 2.0 2.0 2.0

Unrestricted airflow Yes Yes Yes Probe material N/A N/A N/A Residence time N/A N/A N/A Will there be changes within the next 18 months? Yes No No

### Air Quality Monitoring Network Plan – July 2009

C-23 Is it suitable for comparison against the annual PM2.5? N/A N/A N/A

Frequency of flow rate verification for manual PM samplers audit Monthly N/A N/A

Frequency of flow rate verification for automated PM analyzers audit N/A N/A N/A

Frequency of onepoint QC check (gaseous) N/A N/A N/A

Last Annual Performance Evaluation (gaseous) N/A N/A N/A

Last two semi-annual flow rate audits for PM monitors N/A N/A N/A

### Air Quality Monitoring Network Plan – July 2009

C-24 

## Riverside-Rubidoux Site Photos

Looking North from the probe. Looking East from the probe.

Looking South from the probe. Looking West from the probe.

### Air Quality Monitoring Network Plan – July 2009

C-25 

## Riverside-Rubidoux Site Photos (Cont.)

Looking at the probe from the North. Looking at the probe from the East.

Looking at the probe from the South. Looking at the probe from the West.