2013 AMBIENT AIR MONITORING 

NETWORK PLAN 

Monitoring and Compliance Division 

May 2013
SLOAPCD 2013 Network Plan - i - May 2013 

Table of Contents

1. Introduction ..................................................................................................................................... 1

2. Overview of Network Operation .................................................................................................... 2

2.1 Air Monitoring Network Design – Site Types and Spatial Scales ..................................... 2

2.2 Ambient Air Monitoring Network in San Luis Obispo County ......................................... 3

Changes to the Monitoring Network Since the Previous Network Plan ............................ 3

Ozone Monitoring Network ............................................................................................... 4

Nitrogen Dioxide Monitoring Network ............................................................................. 6

Sulfur Dioxide Monitoring Network ................................................................................. 8

PM10 and PM2.5 Particulate Monitoring Network .............................................................. 8

Other Networks .................................................................................................................. 9

2.3 Air Quality Data ............................................................................................................... 10

2.4 Proposed Network Changes and Improvements .............................................................. 11

3. Overview of Non-network Monitoring ........................................................................................ 12

Appendix A: Minimum Monitoring Requirements ................................................................................. 1

Appendix B: Collocation Requirements .................................................................................................. 1

Appendix C: Detailed Site Information ................................................................................................... 1

List of Figures 

Figure 1: Map of Ambient Air Monitoring Stations in San Luis Obispo County in 2012 ........................ 1 
SLOAPCD 2013 Network Plan - ii - May 2013 

List of Tables 

Table 1: Relationship Among Site Type and Scale of Representativeness .............................................. 2 

Table 2: Ambient Air Quality Parameters Monitored in San Luis Obispo County in 2011 .................... 7 

Table 3: Some Sources of Ambient Air Quality Data ................................................................................ 10 

Table A-1: Minimum Monitoring Requirements for Ozone ................................................................... A-1 

Table A-2: Minimum Monitoring Requirements for PM2.5 SLAMs ......................................................... A-1 

Table A-3: Minimum Monitoring Requirements for Continuous PM2.5 Monitors ............................... A-2 

Table A-4: Minimum Monitoring Requirements for PM10 ...................................................................... A-2 

Table A-5: Minimum Monitoring Requirements for NO2 ....................................................................... A-3 

Table A-6: Minimum Monitoring Requirements for SO2 ........................................................................ A-3 

Table A-7: Minimum Monitoring Requirements for CO ......................................................................... A-4 

Table A-8: Minimum Monitoring Requirements for Pb at NCore ......................................................... A-4 

Table A-9: Source Oriented Lead Monitoring (Including Airports) ....................................................... A-4 

Table B- 1: Collocation Requirements for PM2.5 ...................................................................................... B-1 
SLOAPCD 2013 Network Plan - 1 - May 2013 

1. Introduction 

The San Luis Obispo County Air Pollution Control District (SLOAPCD) 2013 Ambient Air Monitoring 

Network Plan is an annual examination and evaluation of the SLOAPCD’s network of air pollution 

monitoring stations. This annual review of our State and Local Air Monitoring Stations (SLAMS) 

network is required by Title 40, Code of Federal Regulations, Part 58.10 (40 CFR 58.10). The review 

process helps ensure continued consistency with the network’s specific monitoring objectives 

defined in the regulations and confirms that the information in the state and federal monitoring 

records accurately and properly classify each station. Information is provided for all ambient air 

pollution monitoring which occurred in the county including sites operated by the California Air 

Resources Board (ARB). Data for ARB sites was obtained from that agency and are accurate to the 

best of our knowledge. 

This report is a directory of existing and proposed monitoring in the SLOAPCD’s network of SLAMS 

monitoring stations and serves as a progress report on the recommendations and issues raised in 

earlier network reviews. The review period of this report looks back to July 2012 (the publication of 

the 2012 Ambient Air Monitoring Network Review) and looks forward to December 2014 anticipating 

any changes to the network. The Code of Federal Regulations requires specific detailed monitoring 

network information be included in this report along with a 30-day public review period prior to 

submittal of the report to the USEPA. 

Figure 1: Map of Ambient Air Monitoring Stations in San Luis Obispo County in 2012 
SLOAPCD 2013 Network Plan - 2 - May 2013 

2. Overview of Network Operation 

2.1 Air Monitoring Network Design – Site Types and Spatial Scales 

Federal regulations, specifically Appendix D to 40 CFR 58, require that a SLAMS network be designed 

to meet a minimum of three basic monitoring objectives: providing air pollution data to the public in 

a timely manner, supporting compliance with the NAAQS (see Appendix D), and supporting air 

pollution research. A variety of site types are needed to support these basic objectives, including the 

six general types identified in Appendix D: 

1. Highest Concentration: Sites located to determine the highest concentration expected to 

occur in the area covered by the network. 

2. Population Exposure: Those located to determine representative concentrations in areas of 

high population density. 

3. Source Oriented: Sites located to determine the impact on ambient pollution levels of 

significant sources or source categories. 

4. General/Background: Those located to determine general background concentration levels. 

5. Regional Transport: Sites located to determine the extent of regional pollutant transport 

among populated areas, and in support of secondary standards. 

6. Welfare Related Impacts: Sites located to determine the welfare-related impacts in more 

rural and remote areas (such as visibility impairment and effects on vegetation). 

The physical siting of an air monitoring station must conform to 40 CFR 58 and its location must 

achieve a spatial scale of representativeness that is consistent with the monitoring objective and site 

type. The spatial scale results from the physical location of the site with respect to the pollutant 

sources and categories. It estimates the size of the area surrounding the monitoring site that 

experiences uniform pollutant concentrations. The categories of spatial scale are: 

• Microscale - An area of uniform pollutant concentrations ranging from several meters up to 

100 meters. 

• Middle Scale – uniform pollutant concentrations in an area of about 110 meters to 0.5 

kilometer. 

• Neighborhood Scale – an area with dimensions in the 0.5 to 4 kilometer range. 

• Urban Scale – Citywide pollutant conditions with dimensions of from 4 to 50 kilometers. 

• Regional Scale – An entire rural area of the same general geography (this area ranges from 

tens to hundreds of kilometers). 

Table 1: Relationship Among Site Type and Scale of Representativeness 

Site Type Appropriate Spatial Scale 

Highest concentration Micro, middle, neighborhood (sometimes urban) 

Population Exposure Neighborhood, urban 

Source Oriented Micro, middle, neighborhood 

General/Background Neighborhood, urban, regional 

Regional transport Urban, regional 

Welfare-related impacts Urban, regional 
SLOAPCD 2013 Network Plan - 3 - May 2013 

2.2 Ambient Air Monitoring Network in San Luis Obispo County 

Figure 1 shows a map of all currently operating ambient air monitoring stations in San Luis Obispo 

County, which also comprises the San Luis Obispo-Paso Robles Metropolitan Statistical Area (MSA). 

Air monitoring responsibilities for the MSA are divided between SLOAPCD and ARB, as allowed by 40 

CFR 58, Appendix D, Section 2.e, and SLOAPCD acknowledges this joint responsibility. 

There are currently ten permanent ambient air monitoring stations in the MSA. Eight of these 

stations are operated by the SLOAPCD as part of our SLAMS network. ARB operates two additional 

stations in the county as part of their SLAMS network, one in Paso Robles and the other in San Luis 

Obispo. Table 2 lists these stations, the agency or company which operates them, the pollutant or 

meteorological parameters which are monitored at each location, and the site type. 

Changes to the Monitoring Network Since the Previous Network Plan 

This section lists changes made to the District’s network since the publication of the 2012 Ambient 

Air Monitoring Network Plan. 

Ozone Monitoring Network: 

The Teledyne-API 400A ozone analyzer at the Atascadero station failed in January 2013 and was 

replaced with a new Teledyne-API T400 ozone analyzer. 

Particulate Monitoring Network: 

No changes were made to the Particulate Monitoring Network. 

Nitrogen Dioxide Monitoring Network: 

The Teledyne-API 200A NO/NO2/NOx analyzer at the Morro Bay station failed in December 2012 and 

was replaced with a new Teledyne-API T200U analyzer in January 2013. The 200A at Nipomo 

Regional Park was also upgraded to a T200U in May 2013. 

Sulfur Dioxide Monitoring Network: 

The Thermo 43C SO2 analyzer at Mesa2 was upgraded to a Teledyne-API T100U SO2 analyzer in 

March 2013. 

Other: 

1. A new roof and safety railing was installed at the Morro Bay station in November 2012. 

2. The roof deck and safety railing were extended at the Nipomo Regional Park station in 

September 2012. 

3. A new safety railing was installed at the Red Hills site in February 2013. 

4. The wind measurement systems at the Nipomo Regional Park, CDF, and Mesa2 stations 

were upgraded from mechanical cup and vane systems to MetOne 50.5 sonic anemometers 

in November 2012, May 2013, and January 2013, respectively. 

5. The Environics S-100 Multi Gas Calibrators at the Nipomo Regional Park and Mesa2 stations 

were upgraded to Teledyne-API 700E Dynamic Dilution Calibrators in August 2012 and May 

2013, respectively. 

6. The data logger at the Morro Bay station was upgraded from an ESC 8816 to an Agilaire/ESC 

8832 logger in February 2013. 

7. The data acquisition system used retrieve, store, validate, and generate strings for AQS 

upload was upgraded from ESC’s E-DAS Ambient to Agilaire’s AirVision on January 1, 2013. 
SLOAPCD 2013 Network Plan - 4 - May 2013 

Ozone Monitoring Network 

All ambient air monitoring stations in the county except for Mesa2, Grover Beach, and CDF monitor 

for ozone (see Table 2). The SLAMS network in San Luis Obispo County features ozone monitors 

located in Atascadero, Red Hills, Carrizo Plains, Paso Robles, Morro Bay, San Luis Obispo, and 

Nipomo Regional Park. 

Atascadero – Operated by the SLOAPCD since 1988, this population-oriented neighborhood scale 

ozone monitor is located near the central business district of downtown Atascadero and is bounded 

on two sides by elementary schools. It provides a measurement of representative ozone 

concentration for the City of Atascadero. Ozone concentrations at this site exhibit strong diurnal 

fluctuations caused by titration of ozone by oxides of nitrogen from nearby mobile and residential 

sources. Measured concentrations at this site are often similar to those recorded at Paso Robles and 

are some of the highest in the SLAMS network. The highest ozone concentrations at Atascadero 

occur when high pressure over the interior southwest U.S. causes transport of ozone and other 

pollutants into SLO County from the east. Under these infrequent conditions transported ozone 

enhanced by local pollutants can cause highly elevated concentrations. The prevailing West or 

Northwest winds from the coast help keep ozone levels at Atascadero low most of the time. 

Paso Robles – Operated by ARB since 1974, this population-oriented urban scale ozone monitor 

provides a representative ozone concentration for the suburban areas of the City of Paso Robles. 

The conditions under which elevated ozone levels occur and the location’s prevailing winds are 

similar to Atascadero. 

Morro Bay – Operated since 1975 by SLOAPCD, this site provides regional scale and 

General/Background ozone monitoring. Located in downtown Morro Bay, the monitor generally 

measures background levels of ozone from the predominant northwest winds blowing off of the 

Pacific Ocean. Under unusual meteorological conditions, the site can record elevated ozone 

concentrations transported from urban areas as far south as the Los Angeles basin. 

San Luis Obispo – Operated by ARB since 1970, this population-oriented, neighborhood scale ozone 

monitor provides a representative ozone concentration for the City of San Luis Obispo. The monitor 

is located in the urban area where ozone concentrations are significantly affected by the process of 

depletion by titration with local mobile and stationary NOx sources. As a result the concentrations 

recorded here are often lower than at Morro Bay. 

Nipomo Regional Park – Operated by SLOAPCD since 1998, this station provides monitoring of 

background levels of ozone on a regional scale. Previously (1979 to 1996) ozone had been 

monitored in Nipomo on Wilson Street (06-79-4001), several miles away. The ozone concentrations 

measured at NRP are representative of interior portions of the Nipomo Mesa and are the highest 

recorded in the coastal region of San Luis Obispo County. 

Red Hills – Operated by SLOAPCD since 2000, this station is located on the summit of the Red Hills 

near the community of Shandon at an elevation of about 2000 feet. This regional scale site is often 

influenced by ozone transport from outside of the county, and consistently records the highest and 

most persistent ozone concentrations in the network; its site type is thus Regional Transport and 

Maximum Concentration. In early 2012, the eastern portion of the county was designated as 

marginally non-attainment for the federal 8-hr ozone standard based on the design value from this 

site. 
SLOAPCD 2013 Network Plan - 5 - May 2013 

Carrizo Plains – Operated by SLOAPCD since January 2006, this station monitors background levels 

and ozone transport on a regional scale. The monitor is located in an outbuilding at the Carrizo 

Plains School. The ozone concentrations recorded here are second only to Red Hills in concentration 

and persistence. 

As noted in Table 2, below, the SLAMS site types employed by the existing ozone network are: 

1) Highest Concentration – The Red Hills station typically records the highest ozone 

concentrations in the county. The high ozone levels tend to occur in the interior areas of the 

county during summer, either following long periods of wind stagnation, or as a result of 

offshore winds which can transport pollutants from interior regions to the northeast. 

2) High Population Exposure – The Paso Robles, Atascadero and San Luis Obispo monitors 

provide a good representation of the ozone levels in the major cities of the county. 

3) Source Impact – Because ozone is a secondary pollutant the effect of emissions from any 

single source are experienced 5 to 7 hours later and often many miles distant. As a regional 

pollutant, monitoring for specific sources of ozone is not performed. 

4) General/Background – The monitors at Morro Bay, Carrizo Plains and Nipomo Regional Park 

provide regional background ozone levels. 

5) Regional Transport – The stations located at Carrizo Plains and Red Hills provide excellent 

surveillance of regional transport of ozone in the interior part of the county. Coastal 

monitoring stations have provided evidence in the past of regional transport of ozone over 

water from distant urban sources. 
SLOAPCD 2013 Network Plan - 6 - May 2013 

Nitrogen Dioxide Monitoring Network 

The SLAMS network in San Luis Obispo County features nitrogen dioxide (NO2) monitors at 

Atascadero, Morro Bay, and Nipomo Regional Park. NO2 levels have always been well below the 

state and federal standards at all locations in our county. For this reason, except in the case of 

Morro Bay, NO2 monitoring is most useful here as an indicator of depletion of ambient ozone 

through titration with nitric oxide. Having at least one NO2 monitor in each geographical region of 

the county also serves a long-term air quality surveillance role. 

Atascadero – Operated by SLOAPCD since 1990, this population-oriented monitor is considered 

neighborhood scale. This is the only NO2 monitor in the Salinas River air basin, and it records the 

highest NO, NO2 and NOx levels in the county. The monitor’s location downtown has established a 

strong diurnal inverse relationship between ozone and NO2 levels caused by local mobile sources 

and residential and commercial combustion of natural gas. 

Morro Bay – Operated by SLOAPCD since 2001 this monitor is neighborhood scale and monitors 

emissions from a specific source: the Morro Bay power plant, located less than a mile upwind. 

Nipomo Regional Park – Operated by the SLOAPCD since 1998, this monitor is regional in scale and 

is representative of background concentrations on the Nipomo Mesa. The site’s location in a large 

natural area away from local or mobile sources makes it ideal for regional surveillance of NO2. 

The SLAMS monitoring objectives met by the existing NO2 network are: 

1) Highest Concentration – The Atascadero monitor historically has measured the highest NO2

concentrations in the county. NO2 levels are the result of titration of ambient ozone by local 

sources of nitric oxide and as a result values are always relatively low. Levels have never 

exceeded the 1-hr NO2 standard (100 ppb), with annual maximum 1-hr concentrations 

typically around 50% of the standard. 

2) General/Background – With no significant local sources present the monitor at Nipomo 

Regional Park provides an excellent measure of background NO2 levels on the Nipomo Mesa.

3) Source Oriented – The monitor at Morro Bay is placed to monitor local impacts of emissions 

from the Morro Bay Power Plant, the single greatest stationary source of oxides of nitrogen 

in the county. 

Regional Transport and Welfare-Related impacts of NO2 are not currently addressed by the District’s 

SLAMS network and are not thought to be significant. San Luis Obispo County, which comprises the 

San Luis Obispo-Paso Robles MSA, does not have—nor per Appendix section 4.3 of 40 CFR 58 is it 

required to have—any NO2 sites for vulnerable populations, near-road NO2 monitoring sites, or 

area-wide NO2 sites.
SLOAPCD 2013 Network Plan - 7 - May 20

Table 2: Ambient Air Quality Parameters Monitored in San Luis Obispo County in 2011 

 O3 NO NO2 NOx SO2 PM10 PM2.5 WS WD 

SLOAPCD Stations 

Atascadero P P,C P,C P,C P P X X 

Morro Bay B S S S X X 

Nipomo Regional Park B B B B B X X 

Grover Beach X X 

Mesa2 S,C S S X X 

CDF S,C S,C X X 

Carrizo Plains T,B X X 

Red Hills T,C X X 

ARB Stations 

San Luis Obispo P P P X X 

Paso Robles P P X X 

Legend: 

O3 Ozone SO2 Sulfur Dioxide WD Wind Direction S Source Ori

NO Nitric Oxide PM10 Particulates < 10 microns ATM Ambient Temperature B General/Ba

NO2 Nitrogen Dioxide PM2.5 Particulates < 2.5 microns C Maximum Concentration T Regional Tr

NOx Oxides of Nitrogen WS Wind Speed P Population Exposure X Parameter 
SLOAPCD 2013 Network Plan - 8 - May 2013 

Sulfur Dioxide Monitoring Network 

The sulfur dioxide (SO2) monitoring network in San Luis Obispo County currently consists of one 

station: Mesa2. 

Mesa2 – Operated by the SLOAPCD since 2006, this monitor performs surveillance of a nearby oil 

refinery. It is considered middle scale and highest concentration for SO2. Since it is located close to 

and downwind of a major source of SO2 emissions it is representative only of the immediate locality. 

The station was sited to optimize surveillance of the refinery’s nearby coke calciner, which has since

been shut down. 

The SLAMS SO2 monitoring objectives met by the network are: 

1) Highest Concentration – The monitor at MESA2 currently records the highest SO2 levels in 

the county. 

2) Source Impact – The monitor at MESA2 is invaluable in determining the SO2 source impact 

upon the immediate region. 

Monitoring objectives not addressed by the existing SO2 network are: General/Background, 

Population, Regional Transport, and Welfare-Related. Historical SO2 monitoring performed 

elsewhere in the county (at NRP from 1998-2006; Morro Bay, 1979-1995; Grover Beach, 1982-2004; 

and at decommissioned stations in Arroyo Grande “Ralcoa” (06-079-1005), 1991-2002, and “Mesa1” 

(06-079-3002), 1987-94) has provided good evidence that monitoring for these objectives is not 

needed. 

PM10 and PM2.5 Particulate Monitoring Network 

The particulate monitoring network in San Luis Obispo County consists of six FEM PM10 monitors (at 

Paso Robles, Atascadero, San Luis Obispo, Mesa 2, CDF and Nipomo Regional Park) and four FEM 

PM2.5 monitors (at Atascadero, CDF, Mesa2 and San Luis Obispo). The PM10 network has been in 

place since 1988, and PM2.5 samplers began operation in 1999 in response to the establishment of a 

new federal standard for PM2.5 in 1997. Originally all particulate monitoring in the county was 

performed as part of ARB’s network, but eventually all monitors except those at Paso Robles and 

San Luis Obispo became part of the SLOAPCD network, which has developed its own processing 

facilities and operating procedures. Note that, for quality assurance, the District remains part of the 

ARB Primary Quality Assurance Organization (PQAO). SLOAPCD therefore relies on ARB to perform 

federally required audits of its particulate monitors and to meet federal collocation requirements. 

Initially, all particulate sampling was conducted by the manual FRM method. With the advent of 

continuous monitoring technologies, all the FRM monitors in SLO County have been replaced with 

FEM BAM 1020 monitors in the last few years. These are continuous semi-real time monitors that 

report hourly PM concentrations all year long. The hourly data has greatly improved the SLOAPCD 

abilities to issue timely air quality forecast which is a significant benefit for the advancement of 

public health goals. 

Paso Robles – Operated by ARB since 1991 this PM10 monitor is urban in scale and representative of 

the city of Paso Robles. The FRM sampler at this site was replaced with an FEM BAM 1020 PM10

sampler in August 2009. 
SLOAPCD 2013 Network Plan - 9 - May 2013 

Atascadero – Operated by SLOAPCD, PM10 monitoring has been conducted here since 1988, initially 

via an FRM and currently with an FEM BAM 1020 continuous monitor. Collocated FRM PM2.5

monitors began operation in 1999 and have since been replaced by a single FEM BAM 1020. All 

monitors are neighborhood in scale and representative of particulate concentrations in the city of 

Atascadero. 

San Luis Obispo – Operated by ARB, a PM10 sampler has been in place since 1988, and the PM2.5 

sampler since 1999. ARB replaced the FRM samplers with continuous FEM BAM instruments in 2011. 

These population-oriented monitors are neighborhood in scale and represent particulate 

concentrations in the City of San Luis Obispo. 

Mesa2 – Operated by the SLOAPCD since 2006, this site initially featured collocated FRM PM10 

samplers that were replaced by a single FEM BAM 1020 PM10 monitor in 2009. An FEM BAM 1020 

PM2.5 monitor was installed at the same time. This site monitors source impacts from the nearby oil 

refinery and coastal dunes and is neighborhood scale. These monitors record some of the highest 

particulate levels in the county and are strongly influenced the extensive coastal sand dunes and the 

Oceano Dunes State Vehicular Recreation Area (ODSVRA) located upwind. 

CDF – Originally established for the Nipomo Mesa Phase 2 Particulate Study, this site has become a 

permanent part of our SLAMS particulate network. The site features FEM BAM 1020 samplers for 

PM10 and PM2.5, which are neighborhood in scale and measure source impacts from the ODSVRA. In 

2012, extensive temporary monitoring on the Nipomo Mesa downwind of the ODSVRA confirmed 

that this site is located within the 1 square mile sector of the study area that experiences the highest 

PM10 levels. See http://slocleanair.org/communitymonitoringproject for details. 

Nipomo Regional Park – Operated at this location by SLOAPCD since 1998, it replaced a site at 

Wilson Street in Nipomo that operated from 1990-96. The 1-in-6 day FRM PM10 sampler was 

replaced with an FEM BAM 1020 continuous PM10 sampler in 2010. The monitor is regional in scale 

and is representative of PM10 concentrations on the Nipomo Mesa. 

Statement Regarding Review of Changes to the PM2.5 Network 

In the event that SLOAPCD needed to change the location of a PM2.5 monitor that recorded 

violations of the NAAQS, the agency would notify EPA Region 9 and ARB contact points immediately, 

and work closely with ARB to formulate a plan for moving the site. The public would be notified of 

the plan and provided with an opportunity to comment of at least 30 days. Finally, the agency would 

submit formal notification to EPA. SLOAPCD intends to discuss and receive approval of any changes 

to our PM2.5 Network—whether they affect monitors violating NAAQS or not—with ARB and EPA 

prior to making them, however unforeseen circumstances (e.g. unexpected loss of site access) may 

preclude this. 

Other Networks 

San Luis Obispo County, which comprises the San Luis Obispo-Paso Robles MSA, is not required to 

have—nor does it have—any NCORE, PAMS, lead, or carbon monoxide monitoring stations. 
SLOAPCD 2013 Network Plan - 10 - May 2013 

2.3 Air Quality Data 

All of the ambient air monitoring stations in the county are registered with the USEPA and ARB and 

regularly report data to the EPA’s AIRS/AQS database and ARB’s AQMIS2 website. Validated data is 

submitted to AQS no later than the end of the quarter following the quarter in which it was 

collected. The data generated at these stations are public information and are available in various 

formats. Table 3, below, lists some popular sources for this air quality data. 

SLOAPCD, and when applicable ARB, regularly submit to AQS precision and accuracy data for all 

gaseous and particulate pollutants measured in the network. Additionally, in accordance with 40 CFR 

58.26, SLOAPCD certifies its AQS dataset for the previous year every spring. SLOAPCD submitted a 

certification package for calendar year 2012 data to EPA on April 18, 2013. 

Table 3: Some Sources of Ambient Air Quality Data 

Agency Address For Data 

Requests Internet address Data Available 

San Luis Obispo 

County APCD 

3343 Roberto Court 

San Luis Obispo, CA 

93401 

attn: Karl Tupper 

www.slocleanair.org/air/data.asp

San Luis 

Obispo County 

only 

CARB 

P.O. Box 2815 

Sacramento, CA 

95812 

www.arb.ca.gov

www.arb.ca.gov/adam/index.htm

l

California Air 

Monitoring 

Data 

US EPA 

Ariel Rios Building 

1200 Pennsylvania 

Avenue, N.W. 

Washington, DC 20460 

www.epa.gov

www.epa.gov/ttn/airs/airsaqs/ind

ex

National Air 

Monitoring 

Data 
SLOAPCD 2013 Network Plan - 11 - May 2013 

2.4 Proposed Network Changes and Improvements 

Ozone Monitoring Network: 

No changes to the ozone monitoring network for are anticipated for 2013-2014. 

Nitrogen Dioxide Network: 

No changes to the nitrogen dioxide monitoring network for are anticipated for 2013-2014. 

Sulfur Dioxide Monitoring Network: 

No changes to the sulfur dioxide monitoring network for are anticipated for 2013-2014. 

Particulate Monitoring Network: 

No changes to the particulate monitoring network for 2013-2014 are anticipated. 

Meteorology Monitoring Network: 

No changes to the particulate monitoring network for 2013-2014 are anticipated. 

Site Improvements: 

1. The ESC 8816 data loggers at stations at Nipomo Regional Park, CDF, Mesa2, and—pending 

funding—Red Hills and Atascadero are scheduled to be upgraded to ESC/Agilaire 8832 

loggers. 

2. All sites are scheduled to have high speed internet connections installed, and data retrieval 

will be upgraded from dial-up communication at 9600 baud to retrieval over the internet via 

private network. 
SLOAPCD 2013 Network Plan - 12 - May 2013 

3. Overview of Non-network Monitoring 

Frequent exceedences of the California Ambient Air Quality Standard for 24-hour PM10 (50 Mg/m3) 

are observed downwind of the ODSVRA on the Nipomo Mesa. To address these exceedences, the 

SLOAPCD Board of Directors approved Coastal Dunes Dust Control Rule 1001. The rule requires, 

inter alia, the ODSVRA operator (i.e., California State Parks) to monitor PM10 levels in at least two 

locations within the ODSVRA: one downwind of an area where off-road vehicle activity is allowed, 

and another downwind of a comparable area where off-road vehicle activity is not allowed. The 

continuous monitoring is to be performed with FEM monitors. See 

http://slocleanair.org/air/pmstudydata.php for details. 

California State Parks is currently preparing to perform preliminary PM10 monitoring on the ODSVRA 

with non-FEM E-BAM monitors. SLOAPCD anticipates that the FEM-based PM10 monitoring required 

by Rule 1001 will commence during the period reviewed in this report, i.e. by December 2014. This 

monitoring will be conducted solely to comply with Rule 1001, and the monitoring entity will be 

California State Parks rather than an air quality agency. Therefore, SLOAPCD does not anticipate that 

the data obtained will be submitted to AQS or be used for federal regulatory decision making.
SLOAPCD 2013 Network Plan A-1 May 

Appendix A: Minimum Monitoring Requirements The SLOAPCD monitoring network meets the minimum monitoring requirements for all criteria pollutants measured as Tables A-1 through A-9 list the criteria used to determine compliance with federal regulations. Table A-1: Minimum Monitoring Requirements for Ozone 

MSA 

County 

Population 

(Census Year) 8-hour Design Value (years) Design Value Site Name (AQS ID) 

Minimum # 

of Monitors 

Required 

San Luis ObispoPaso Robles San Luis Obispo 269,637 (2010) 79 ppb* (2010-12) Red Hills (06-079-8005) 1 

* This Design Value is for eastern San Luis Obispo County, which in early 2012 was designated as marginally non-attainmozone standard. The design value for the rest of the county is 66 ppb (2010-12), and the corresponding design value site 0005). Monitors required for SIP or Maintenance Plan: None Table A-2: Minimum Monitoring Requirements for PM2.5 SLAMs 

MSA 

County 

Population 

(Census Year) 

Annual Design 

Value (years) 

Annual Design 

Value Site 

(AQS ID) 

Daily Design 

Value 

(years) 

Daily Design 

Value Site Name

(AQS ID) 

Minimum 

Number of 

Monitors 

Required 

San Luis ObispoPaso Robles San Luis Obispo 269,637 (2010) 8.2 ug/m3 (2010-12) Mesa2 (06-079-2004) 23 ug/m3 (2010-12) Mesa2 (06-079-2004) 0-1 
SLOAPCD 2013 Network Plan A-2 May 

Table A-3: Minimum Monitoring Requirements for Continuous PM2.5 Monitors 

MSA 

County 

Population 

(Census Year) 

Annual Design 

Value (years) 

Annual Design 

Value Site 

(AQS ID) 

Daily Design 

Value 

(years) 

Daily Design 

Value Site Name 

(AQS ID) 

Minimum 

Number of 

Monitors 

Required 

San Luis ObispoPaso Robles San Luis Obispo 269,637 (2010) 8.2 ug/m3 (2010-12) Mesa2 (06-079-2004) 23 ug/m3 (2010-12) Mesa2 (06-079-2004) 0-1 

Monitors required for SIP or Maintenance Plan: None Table A-4: Minimum Monitoring Requirements for PM10

MSA 

County 

Population 

(Census Year) Max Concentration (Year) Max Concentration Site Name (AQS ID) 

Minimum 

Number of 

Monitors 

Required 

San Luis ObispoPaso Robles San Luis Obispo 269,637 (2010) 180 ug/m3 (2012) CDF (06-079-2007) 3-4 

Monitors required for SIP or Maintenance Plan: None 
SLOAPCD 2013 Network Plan A-3 May 

Table A-5: Minimum Monitoring Requirements for NO2

CBSA 

Population

(Census 

Year) 

Max AADT 

counts 

(Year) 

# Required 

Near-road 

Monitors 

# Active 

Nearroad 

Monitors

# Additional 

Near-road 

Monitors 

Needed 

# Required 

Area-wide 

Monitors 

# 

Are

Mo

San Luis ObispoPaso Robles 269,637 (2010) 68,000 (2010) 0 0 0 0 

Monitors required for SIP or Maintenance Plan: None Monitors required for PAMS: None EPA Regional Administrator-required monitors per 40 CFR 58, App. D 4.3.4: NoneTable A-6: Minimum Monitoring Requirements for SO2

CBSA County 

Population

(Census 

Year) 

Total SO2

(Inventory 

year) 

Population 

Weighted 

Emissions 

Index 

Minimum 

Number of 

Monitors Required 

Numb

Act

Mon

San Luis Obispo-Paso 

Robles 

San Luis 

Obispo 

269,637 

(2010) 

287 tpy* 

(2008) 78* 0 1 

* Value in table is calculated with data from the 2008 National Emissions Inventory (http://www.epa.gov/ttn/chief/net/20SLOAPCD’s most recent emissions inventory (2009; available at http://www.slocleanair.org/air/emissions.php) records 3emissions, resulting in a PWEI of 1095. Monitors required for SIP or Maintenance Plan: None EPA Regional Administrator-required monitors per 40 CFR 58, App. D 4.4.3: None 
SLOAPCD 2013 Network Plan A-4 May 

Table A-7: Minimum Monitoring Requirements for CO 

CBSA County 

Population

(Census 

Year) 

Number of 

Required Near 

Road Monitors 

Number of 

Active Near 

Road 

Monitors 

Number 

of 

Additional 

Monitors 

Needed 

San Luis Obispo-Paso 

Robles 

San Luis 

Obispo 

269,637 

(2010) 0 0 0 

Monitors required for SIP or Maintenance Plan: None EPA Regional Administrator-required monitors per 40 CFR 58, App. D 4.2.2: None Table A-8: Minimum Monitoring Requirements for Pb at NCore 

NCore Site Name 

(AQS ID) CBSA County 

Population

(Census 

Year) 

Number of 

Required Monitors 

Number of 

Active 

Monitors 

N/A San Luis Obispo-Paso Robles San Luis Obispo 269,637 (2010) 0 0 

Table A-9: Source Oriented Lead Monitoring (Including Airports) 

Source 

Name Address Pb Emissions 

Emissions 

Inventory 

Source and 

Data Year 

Design Value 

Number of 

Required Monitors 

Number of Active 

Monitors 

No Sources N/A N/A N/A N/A 0 0 

Monitors required for SIP or Maintenance Plan: None EPA Regional Administrator-required monitors per 40 CFR 58, App. D 4.5(c): None
SLOAPCD 2013 Network Plan -B-1- May 2013 

Appendix B: Collocation Requirements 

Particulate monitoring (PM10, PM2.5, and lead) is subject to the collocation requirements described in 

Appendix A, section 3 of 40 CFR 58. The requirements apply at the Primary Quality Assurance 

Organization (PQAO) level, and SLOAPCD is part of the ARB PQAO. All particulate monitors in San 

Luis Obispo County are MetOne 1020 continuous FEM BAM instruments (PM10 method code: 122; 

PM2.5 method code: 170). There are no collocated particulate monitors in the SLOAPCD network but 

as shown in the Table B-1 (adapted from the 2012 Annual Monitoring Report for Small Districts in 

California, online at http://www.arb.ca.gov/aqd/amnr/amnr2012.pdf) the ARB PQAO meets the 

minimum collocation requirements for its network of PM2.5 FEM BAM 1020 monitors. This 

information is one year old, but it remains accurate to the best of our knowledge. With regard to 

PM10 monitoring, all monitors in the District are continuous, and thus there are no collocation 

requirements. Finally, lead monitoring is not done in the County, and thus there is no collocation 

requirement. 

Table B- 1: Collocation Requirements for PM2.5

Method 

Code 

# 

Primary 

Monitors 

# Required 

Collocated 

Monitors 

# Active 

Collocated 

Monitors 

# Active Collocated FEM 

Monitors (same method 

designation as primary) 

170 22 3 4 1 
SLOAPCD 2013 Network Plan -C-1- May 2013 

Appendix C: Detailed Site Information 

This appendix presents detailed site information the reporting of which is required by federal 

regulation. 

Local site name Paso Robles 

AQS ID (XX-XXX-XXXX) 06-079-0005 

GPS coordinates (decimal degrees) 35.61467, -120.65691 

Street Address 235 Santa Fe Ave, Paso Robles 

County San Luis Obispo 

Distance to roadways (meters) 118 

Traffic count (AADT, year) 22,600 (2005) 

Groundcover (e.g. asphalt, dirt, sand) Asphalt 

Representative statistical area name (i.e. MSA, CBSA, 

other) 

SAN LUIS OBISPO – PASO ROBLES 

(MSA) 

Pollutant, POC Ozone, 1 PM10, 2 

Parameter code 44201 85101 

Basic monitoring objective(s) NAAQS Public info 

Site type(s) Population 

Exposure 

Population 

Exposure 

Monitor type(s) SLAMS SLAMS 

Instrument manufacturer and model API 400E MetOne BAM 

1020 

Method code 087 122 

FRM/FEM/ARM/other FEM FEM 

Collecting Agency ARB ARB 

Analytical Lab (i.e. weigh lab, toxics lab, other) N/A N/A 

Reporting Agency ARB ARB 

Spatial scale (e.g. micro, neighborhood) Urban Urban 

Monitoring start date (MM/DD/YYYY) 09/01/1991 08/10/2009 

Current sampling frequency (e.g. 1:3, continuous) continuous continuous 

Calculated sampling frequency (e.g. 1:3/1:1) N/A 1:6 

Sampling season (MM/DD-MM/DD) 01/01-12/31 01/01-12/31 

Probe height (meters) 6.2 5.2 

Distance from supporting structure (meters) 2.9 1.9

Distance from obstructions on roof (meters) N/A N/A

Distance from obstructions not on roof (meters) N/A N/A 

Distance from trees (meters) N/A N/A 

Distance to furnace or incinerator flue (meters) N/A N/A 

Distance between collocated monitors (meters) N/A N/A 

Unrestricted airflow (degrees) 360 360 

Probe material for reactive gases (e.g. Pyrex, stainless 

steel, Teflon) 

Teflon N/A 

Residence time for reactive gases (seconds) 11.9 N/A 

Will there be changes within the next 18 months? 

(Y/N) 

N N 

Is it suitable for comparison against the annual 

PM2.5? (Y/N) 

N/A N/A 
SLOAPCD 2013 Network Plan -C-2- May 2013 

Local site name Paso Robles 

Frequency of flow rate verification for manual PM 

samplers 

N/A N/A 

Frequency of flow rate verification for automated PM 

analyzers 

N/A bi-weekly 

Frequency of one-point QC check for gaseous 

instruments 

daily N/A 

Last Annual Performance Evaluation for gaseous 

parameters (MM/DD/YYYY) 

04/16/2013 N/A 

Last two semi-annual flow rate audits for PM 

monitors (MM/DD/YYYY, MM/DD/YYYY) 

N/A 04/16/2013; 

10/31/2012; 

04/17/2012 

Local site name Grover Beach 

AQS ID (XX-XXX-XXXX) 06-079-2001 

GPS coordinates (decimal degrees) 35.12389, -120.63222 

Street Address 9 Le Sage Drive, Grover Beach 

County San Luis Obispo 

Distance to roadways (meters) 10 

Traffic count (AADT, year) 100 (estimated) 

Groundcover (e.g. asphalt, dirt, sand) Cement 

Representative statistical area name (i.e. MSA, CBSA, 

other) 

SAN LUIS OBISPO – PASO ROBLES 

(MSA) 

Pollutant, POC None (this is a meteorology-only station) 
SLOAPCD 2013 Network Plan -C-3- May 2013 

Local site name Mesa2 

AQS ID (XX-XXX-XXXX) 06-079-2004 

GPS coordinates (decimal degrees) 35.02079, -120.56389 

Street Address 1300 Guadalupe Rd., Nipomo 

County San Luis Obispo 

Distance to roadways (meters) 36 

Traffic count (AADT, year) 5700 (2011) 

Groundcover (e.g. asphalt, dirt, sand) Vegetated, Sand 

Representative statistical area name (i.e. 

MSA, CBSA, other) 

SAN LUIS OBISPO – PASO ROBLES 

(MSA) 

Pollutant, POC SO2, 1 PM2.5, 1 PM10, 3 

Parameter code 42410 88101 81102 

Basic monitoring objective(s) NAAQS NAAQS NAAQS 

Site type(s) Source Oriented, 

Max 

Concentration 

Source Oriented Source 

Oriented 

Monitor type(s) SLAMS SLAMS SLAMS 

Instrument manufacturer and model API T100U MetOne BAM 

1020 

MetOne BAM 

1020 

Method code 009 170 122 

FRM/FEM/ARM/other FEM FEM FEM 

Collecting Agency SLOAPCD SLOAPCD SLOAPCD 

Analytical Lab (i.e. weigh lab, toxics lab, 

other) 

N/A N/A N/A 

Reporting Agency SLOAPCD SLOAPCD SLOAPCD 

Spatial scale (e.g. micro, neighborhood) Middle Neighborhood Neighborhood 

Monitoring start date (MM/DD/YYYY) 09/21/2005 05/01/2009 05/01/2009 

Current sampling frequency (e.g. 1:3, 

continuous) 

continuous continuous continuous 

Calculated sampling frequency (e.g. 1:3/1:1) N/A continuous 1:6 

Sampling season (MM/DD-MM/DD) 01/01-12/31 01/01-12/31 01/01-12/31 

Probe height (meters) 4.8 4.8 4.8 

Distance from supporting structure 

(meters) 

1.3 1.3 1.3 

Distance from obstructions on roof (meters) N/A N/A N/A 

Distance from obstructions not on roof 

(meters) 

N/A N/A N/A 

Distance from trees (meters) N/A N/A N/A 

Distance to furnace or incinerator flue 

(meters) 

N/A N/A N/A 

Distance between collocated monitors 

(meters) 

N/A N/A N/A 

Unrestricted airflow (degrees) 360 360 360 

Probe material for reactive gases (e.g. 

Pyrex, stainless steel, Teflon) 

Teflon N/A N/A 

Residence time for reactive gases (seconds) 8.1 N/A N/A 

Will there be changes within the next 18 N N N 
SLOAPCD 2013 Network Plan -C-4- May 2013 

Local site name Mesa2 

months? (Y/N) 

Is it suitable for comparison against the 

annual PM2.5? (Y/N) 

N/A Y N/A 

Frequency of flow rate verification for 

manual PM samplers 

N/A N/A N/A 

Frequency of flow rate verification for 

automated PM analyzers 

N/A Bi-weekly bi-weekly 

Frequency of one-point QC check for 

gaseous instruments 

daily N/A N/A 

Last Annual Performance Evaluation for 

gaseous parameters (MM/DD/YYYY) 

05/14/2013 N/A N/A 

Last two semi-annual flow rate audits for 

PM monitors (MM/DD/YYYY, MM/DD/YYYY) 

N/A 05/14/2013; 

10/30/2012; 

5/15/2012 

05/14/2013; 

10/30/2012: 

5/15/2012 
SLOAPCD 2013 Network Plan -C-5- May 2013 

Local site name San Luis Obispo 

AQS ID (XX-XXX-XXXX) 06-079-2006 

GPS coordinates (decimal degrees) 35.25651, -120.66930 

Street Address 3220 South Higuera St., San Luis Obispo 

County San Luis Obispo 

Distance to roadways (meters) 30 to South Higuera St. 

424 to US 101 

Traffic count (AADT, year) South Higuera St.: 22,529 (2006) 

US 101: 60,500 (2011) 

Groundcover (e.g. asphalt, dirt, sand) asphalt 

Representative statistical area name (i.e. 

MSA, CBSA, other) 

SAN LUIS OBISPO – PASO ROBLES 

(MSA) 

Pollutant, POC O3, 1 PM2.5, 3 PM10, 3 

Parameter code 44201 88101 85101 

Basic monitoring objective(s) NAAQS NAAQS Public Info 

Site type(s) Population 

Exposure 

Population 

Exposure 

Population 

Exposure 

Monitor type(s) SLAMS SLAMS SLAMS 

Instrument manufacturer and model API T400 MetOne BAM 

1020 

MetOne BAM 

1020 

Method code 087 170 122 

FRM/FEM/ARM/other FEM FEM FEM 

Collecting Agency ARB ARB ARB 

Analytical Lab (i.e. weigh lab, toxics lab, 

other) 

N/A N/A N/A 

Reporting Agency ARB ARB ARB 

Spatial scale (e.g. micro, neighborhood) Neighborhood Neighborhood Neighborhood 

Monitoring start date (MM/DD/YYYY) 09/21/2005 09/19/2005 09/19/2005 

Current sampling frequency (e.g. 1:3, 

continuous) 

continuous continuous continuous 

Calculated sampling frequency (e.g. 1:3/1:1) N/A continuous 1:6 

Sampling season (MM/DD-MM/DD) 01/01-12/31 01/01-12/31 01/01-12/31 

Probe height (meters) 12.8 12.8 12.8 

Distance from supporting structure (meters) 1.8 2.0 2.0 

Distance from obstructions on roof (meters) N/A N/A N/A 

Distance from obstructions not on roof 

(meters) 

N/A N/A N/A 

Distance from trees (meters) N/A N/A N/A 

Distance to furnace or incinerator flue 

(meters) 

N/A N/A N/A 

Distance between collocated monitors 

(meters) 

N/A N/A N/A 

Unrestricted airflow (degrees) 360 360 360 

Probe material for reactive gases (e.g. Pyrex, 

stainless steel, Teflon) 

Teflon N/A N/A 

Residence time for reactive gases (seconds) 5.8 N/A N/A 

Will there be changes within the next 18 N N N 
SLOAPCD 2013 Network Plan -C-6- May 2013 

Local site name San Luis Obispo 

months? (Y/N) 

Is it suitable for comparison against the 

annual PM2.5? (Y/N) 

N/A Y N/A 

Frequency of flow rate verification for 

manual PM samplers 

N/A N/A N/A 

Frequency of flow rate verification for 

automated PM analyzers 

N/A Bi-weekly bi-weekly 

Frequency of one-point QC check for 

gaseous instruments 

daily N/A N/A 

Last Annual Performance Evaluation for 

gaseous parameters (MM/DD/YYYY) 

04/16/2013 N/A N/A 

Last two semi-annual flow rate audits for PM 

monitors (MM/DD/YYYY, MM/DD/YYYY) 

N/A 04/16/2013; 

10/31/2012; 

04/17/2012 

04/16/2013; 

10/31/2012; 

04/17/2012 
SLOAPCD 2013 Network Plan -C-7- May 2013 

Local site name CDF 

AQS ID (XX-XXX-XXXX) 06-079-2007 

GPS coordinates (decimal degrees) 35.04676, -120.58777 

Street Address 2391 Willow Rd., Arroyo Grande 

County San Luis Obispo 

Distance to roadways (meters) 46 

Traffic count (AADT, year) 5,700 (2011) 

Groundcover (e.g. asphalt, dirt, sand) Vegetated, Sand 

Representative statistical area name (i.e. MSA, CBSA, 

other) 

SAN LUIS OBISPO – PASO ROBLES 

(MSA) 

Pollutant, POC PM2.5, 1 PM10, 2 

Parameter code 88101 81102 

Basic monitoring objective(s) NAAQS NAAQS 

Site type(s) Max Concentration, 

Source Oriented 

Max 

Concentration, 

Source Oriented 

Monitor type(s) SLAMS SLAMS 

Instrument manufacturer and model MetOne BAM 1020 MetOne BAM 

1020 

Method code 170 122 

FRM/FEM/ARM/other FEM FEM 

Collecting Agency SLOAPCD SLOAPCD 

Analytical Lab (i.e. weigh lab, toxics lab, other) N/A N/A 

Reporting Agency SLOAPCD SLOAPCD 

Spatial scale (e.g. micro, neighborhood) Neighborhood Neighborhood 

Monitoring start date (MM/DD/YYYY) 08/28/2010 08/28/2010 

Current sampling frequency (e.g. 1:3, continuous) continuous continuous 

Calculated sampling frequency (e.g. 1:3/1:1) continuous 1:1 

Sampling season (MM/DD-MM/DD) 01/01-12/31 01/01-12/31 

Probe height (meters) 4.0 4.0 

Distance from supporting structure (meters) 1.4 1.4

Distance from obstructions on roof (meters) N/A N/A

Distance from obstructions not on roof (meters) N/A N/A 

Distance from trees (meters) N/A N/A 

Distance to furnace or incinerator flue (meters) N/A N/A 

Distance between collocated monitors (meters) N/A N/A 

Unrestricted airflow (degrees) 360 360 

Probe material for reactive gases (e.g. Pyrex, stainless 

steel, Teflon) 

N/A N/A 

Residence time for reactive gases (seconds) N/A N/A

Will there be changes within the next 18 months? (Y/N) N N 

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

(Y/N) 

Y N/A 

Frequency of flow rate verification for manual PM 

samplers 

N/A N/A 

Frequency of flow rate verification for automated PM 

analyzers 

bi-weekly bi-weekly 
SLOAPCD 2013 Network Plan -C-8- May 2013 

Local site name CDF 

Frequency of one-point QC check for gaseous instruments N/A N/A 

Last Annual Performance Evaluation for gaseous 

parameters (MM/DD/YYYY) 

N/A N/A 

Last two semi-annual flow rate audits for PM monitors 

(MM/DD/YYYY, MM/DD/YYYY) 

05/15/2013; 

10/30/2012; 

05/16/2012 

05/15/2013; 

10/30/2012; 

05/16/2012 
SLOAPCD 2013 Network Plan -C-9- May 2013 

Local site name Morro Bay 

AQS ID (XX-XXX-XXXX) 06-079-3001 

GPS coordinates (decimal degrees) 35.36639, -120.84260 

Street Address 899 Morro Bay Blvd., Morro Bay 

County San Luis Obispo 

Distance to roadways (meters) 20 to Morro Bay Blvd. 

221 to CA 1 

Traffic count (AADT, year) Morro Bay Blvd.: 12,400 (2006) 

CA 1: 23,000 (2011) 

Groundcover (e.g. asphalt, dirt, sand) Paved 

Representative statistical area name (i.e. MSA, CBSA, 

other) 

SAN LUIS OBISPO – PASO ROBLES 

(MSA) 

Pollutant, POC O3, 1 NO2, 1 

Parameter code 44201 42602 

Basic monitoring objective(s) NAAQS NAAQS 

Site type(s) General/Background Source Oriented 

Monitor type(s) SLAMS SLAMS 

Instrument manufacturer and model API 400A API T200U 

Method code 087 099 

FRM/FEM/ARM/other FEM FRM 

Collecting Agency SLOAPCD SLOAPCD 

Analytical Lab (i.e. weigh lab, toxics lab, other) N/A N/A 

Reporting Agency SLOAPCD SLOAPCD 

Spatial scale (e.g. micro, neighborhood) Regional Neighborhood 

Monitoring start date (MM/DD/YYYY) 01/01/1981 06/01/2001 

Current sampling frequency (e.g. 1:3, continuous) continuous continuous 

Calculated sampling frequency (e.g. 1:3/1:1) N/A N/A 

Sampling season (MM/DD-MM/DD) 01/01-12/31 01/01-12/31 

Probe height (meters) 4.0 4.0 

Distance from supporting structure (meters) 1.0 1.0

Distance from obstructions on roof (meters) N/A N/A

Distance from obstructions not on roof (meters) N/A N/A 

Distance from trees (meters) N/A N/A 

Distance to furnace or incinerator flue (meters) N/A N/A 

Distance between collocated monitors (meters) N/A N/A 

Unrestricted airflow (degrees) 360 360 

Probe material for reactive gases (e.g. Pyrex, stainless 

steel, Teflon) 

Teflon Teflon 

Residence time for reactive gases (seconds) 7.4 8.6

Will there be changes within the next 18 months? (Y/N) N N 

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

(Y/N) 

N/A N/A 

Frequency of flow rate verification for manual PM 

samplers 

N/A N/A 

Frequency of flow rate verification for automated PM 

analyzers 

N/A N/A 
SLOAPCD 2013 Network Plan -C-10- May 2013 

Local site name Morro Bay 

Frequency of one-point QC check for gaseous 

instruments 

Daily Daily 

Last Annual Performance Evaluation for gaseous 

parameters (MM/DD/YYYY) 

06/13/2012 

(Anticipated 

6/12/13) 

06/13/2012 

(Anticipated 

6/12/13) 

Last two semi-annual flow rate audits for PM monitors 

(MM/DD/YYYY, MM/DD/YYYY) 

N/A N/A 
SLOAPCD 2013 Network Plan -C-11- May 2013 

Local site name Nipomo Regional Park 

AQS ID (XX-XXX-XXXX) 06-079-4002 

GPS coordinates (decimal 

degrees) 

35.03150, -120.50101 

Street Address W. Tefft St. and Pomeroy Rd., Nipomo

County San Luis Obispo 

Distance to roadways (meters) 246 

Traffic count (AADT, year) 11,000 (2006) 

Groundcover (e.g. asphalt, dirt, 

sand) 

Vegetated 

Representative statistical area 

name (i.e. MSA, CBSA, other) 

SAN LUIS OBISPO – PASO ROBLES 

(MSA) 

Pollutant, POC O3, 1 NO2, 1 PM10, 2 

Parameter code 44201 42602 81102 

Basic monitoring objective(s) NAAQS NAAQS NAAQS 

Site type(s) General/Background General/Background General/Background

Monitor type(s) SLAMS SLAMS SLAMS 

Instrument manufacturer and 

model 

API 400 API 200 MetOne BAM 1020 

Method code 087 099 122 

FRM/FEM/ARM/other FEM FRM FEM 

Collecting Agency SLOAPCD SLOAPCD SLOAPCD 

Analytical Lab (i.e. weigh lab, 

other) 

N/A N/A N/A 

Reporting Agency SLOAPCD SLOAPCD SLOAPCD 

Spatial scale (e.g. micro, 

neighborhood) 

Regional Regional Regional 

Monitoring start date 

(MM/DD/YYYY) 

11/01/1998 11/01/1998 05/26/2010 

Current sampling frequency (e.g. 

1:3, continuous) 

continuous continuous continuous 

Calculated sampling frequency 

(e.g. 1:3/1:1) 

N/A N/A 1:6 

Sampling season (MM/DDMM/DD) 01/01-12/31 01/01-12/31 01/01-12/31 

Probe height (meters) 4.0 4.0 4.0 

Distance from supporting 

structure (meters) 

1.0 1.0 1.0 

Distance from obstructions on 

roof (meters) 

N/A N/A N/A 

Distance from obstructions not 

on roof (meters) 

N/A N/A N/A 

Distance from trees (meters) N/A N/A N/A 

Distance to furnace or 

incinerator flue (meters) 

N/A N/A N/A 

Distance between collocated 

monitors (meters) 

N/A N/A N/A 
SLOAPCD 2013 Network Plan -C-12- May 2013 

Local site name Nipomo Regional Park 

Unrestricted airflow (degrees) 360 360 360 

Probe material for reactive 

gases (e.g. Pyrex, stainless steel, 

Teflon) 

Teflon Teflon N/A 

Residence time for reactive 

gases (seconds) 

8.4 7.4 N/A 

Will there be changes within the 

next 18 months? (Y/N) 

N N N 

Is it suitable for comparison 

against the annual PM2.5? (Y/N) 

N/A N/A N/A 

Frequency of flow rate 

verification for manual PM 

samplers 

N/A N/A N/A 

Frequency of flow rate 

verification for automated PM 

analyzers 

N/A N/A bi-weekly 

Frequency of one-point QC 

check for gaseous instruments 

daily daily N/A 

Last Annual Performance 

Evaluation for gaseous 

parameters (MM/DD/YYYY) 

05/15/2013 05/15/2013 N/A 

Last two semi-annual flow rate 

audits for PM monitors 

(MM/DD/YYYY, MM/DD/YYYY) 

N/A N/A 05/15/2013; 

10/30/2012; 

05/16/2012 
SLOAPCD 2013 Network Plan -C-13- May 2013 

Local site name Atascadero 

AQS ID (XX-XXX-XXXX) 06-079-8001 

GPS coordinates (decimal degrees) 35.49153, -120.66799 

Street Address 6005 Lewis Ave., Atascadero, CA 

County San Luis Obispo 

Distance to roadways (meters) 68 to Lewis Ave. 

398 to US 101 

Traffic count (AADT, year) Lewis Ave.: 1,000 (estimated) 

US 101: 57,000 (2011) 

Groundcover (e.g. asphalt, dirt, sand) Paved 

Representative statistical area name (i.e. 

MSA, CBSA, other) 

SAN LUIS OBISPO – PASO ROBLES 

(MSA) 

Pollutant, POC O3, 1 NO2, 1 PM2.5, 3 PM10, 3 

Parameter code 44201 42602 88101 81102 

Basic monitoring objective(s) NAAQS NAAQS NAAQS NAAQS 

Site type(s) Population 

Exposure 

Population 

Exposure 

Population 

Exposure 

Population 

Exposure 

Monitor type(s) SLAMS SLAMS SLAMS SLAMS 

Instrument manufacturer and model API T400 API 200A MetOne BAM 

1020 

MetOne BAM 

1020 

Method code 087 099 170 122 

FRM/FEM/ARM/other FEM FRM FEM FEM 

Collecting Agency SLOAPCD SLOAPCD SLOAPCD SLOAPCD 

Analytical Lab (i.e. weigh lab, toxics lab, 

other) 

N/A N/A N/A N/A 

Reporting Agency SLOAPCD SLOAPCD SLOAPCD SLOAPCD 

Spatial scale (e.g. micro, neighborhood) Neighborhood Neighborhood Neighborhood Neighborhood

Monitoring start date (MM/DD/YYYY) 10/01/1998 08/01/1990 05/01/2009 08/28/2010 

Current sampling frequency (e.g. 1:3, 

continuous) 

continuous continuous continuous continuous 

Calculated sampling frequency (e.g. 

1:3/1:1) 

N/A N/A continuous 1:6 

Sampling season (MM/DD-MM/DD) 01/01-12/31 01/01-12/31 01/01-12/31 01/01-12/31 

Probe height (meters) 5.0 5.0 5.8 5.3 

Distance from supporting structure 

(meters) 

1.4 1.4 2.2 1.7 

Distance from obstructions on roof 

(meters) 

N/A N/A N/A N/A 

Distance from obstructions not on roof 

(meters) 

N/A N/A N/A N/A 

Distance from trees (meters) N/A N/A N/A N/A 

Distance to furnace or incinerator flue 

(meters) 

N/A N/A N/A N/A 

Distance between collocated monitors 

(meters) 

N/A N/A N/A N/A 

Unrestricted airflow (degrees) 360 360 360 360 

Probe material for reactive gases (e.g. Teflon Teflon N/A N/A 
SLOAPCD 2013 Network Plan -C-14- May 2013 

Local site name Atascadero 

Pyrex, stainless steel, Teflon) 

Residence time for reactive gases 

(seconds) 

6.6 5.8 N/A N/A 

Will there be changes within the next 18 

months? (Y/N) 

N N N N 

Is it suitable for comparison against the 

annual PM2.5? (Y/N) 

N/A N/A Y N/A 

Frequency of flow rate verification for 

manual PM samplers 

N/A N/A N/A N/A 

Frequency of flow rate verification for 

automated PM analyzers 

N/A N/A bi-weekly bi-weekly 

Frequency of one-point QC check for 

gaseous instruments 

daily daily N/A N/A 

Last Annual Performance Evaluation for 

gaseous parameters (MM/DD/YYYY) 

06/12/2012 

(Anticipated 

06/11/13) 

06/12/2012 

(Anticipated 

06/11/13) 

N/A N/A 

Last two semi-annual flow rate audits for 

PM monitors (MM/DD/YYYY, 

MM/DD/YYYY) 

N/A N/A 12/27/2012; 

06/12/2012; 

(Anticipated 

06/11/13) 

12/27/2012; 

06/12/2012; 

(Anticipated 

06/11/13) 
SLOAPCD 2013 Network Plan -C-15- May 2013 

Local site name Red Hills 

AQS ID (XX-XXX-XXXX) 06-079-8005 

GPS coordinates (decimal degrees) 35.64366, -120.23134 

Street Address 3601 Gillis Canyon Rd., Shandon 

County San Luis Obispo 

Distance to roadways (meters) 1720 

Traffic count (AADT, year) 20 (estimated) 

Groundcover (e.g. asphalt, dirt, sand) Vegetated 

Representative statistical area name (i.e. MSA, CBSA, 

other) 

SAN LUIS OBISPO – PASO ROBLES 

(MSA) 

Pollutant, POC O3, 1 

Parameter code 44201 

Basic monitoring objective(s) NAAQS 

Site type(s) Regional Transport, Max Concentration 

Monitor type(s) SLAMS 

Instrument manufacturer and model API 400A 

Method code 087 

FRM/FEM/ARM/other FEM 

Collecting Agency SLOAPCD 

Analytical Lab (i.e. weigh lab, toxics lab, other) N/A 

Reporting Agency SLOAPCD 

Spatial scale (e.g. micro, neighborhood) Regional 

Monitoring start date (MM/DD/YYYY) 7/1/2000 

Current sampling frequency (e.g. 1:3, continuous) continuous 

Calculated sampling frequency (e.g. 1:3/1:1) N/A 

Sampling season (MM/DD-MM/DD) 01/01-12/31 

Probe height (meters) 4.7 

Distance from supporting structure (meters) 1.2 

Distance from obstructions on roof (meters) N/A 

Distance from obstructions not on roof (meters) N/A

Distance from trees (meters) N/A 

Distance to furnace or incinerator flue (meters) N/A 

Distance between collocated monitors (meters) N/A 

Unrestricted airflow (degrees) 360 

Probe material for reactive gases (e.g. Pyrex, stainless 

steel, Teflon) 

Teflon 

Residence time for reactive gases (seconds) 10.3 

Will there be changes within the next 18 months? 

(Y/N) 

N 

Is it suitable for comparison against the annual 

PM2.5? (Y/N) 

N/A 

Frequency of flow rate verification for manual PM 

samplers 

N/A 

Frequency of flow rate verification for automated PM 

analyzers 

N/A 

Frequency of one-point QC check for gaseous Daily 
SLOAPCD 2013 Network Plan -C-16- May 2013 

Local site name Red Hills 

instruments 

Last Annual Performance Evaluation for gaseous 

parameters (MM/DD/YYYY) 

6/14/2012 

(Anticipated 6/13/2013) 

Last two semi-annual flow rate audits for PM monitors 

(MM/DD/YYYY, MM/DD/YYYY) 

N/A 
SLOAPCD 2013 Network Plan -C-17- May 2013 

Local site name Carrizo Plains 

AQS ID (XX-XXX-XXXX) 06-079-8006 

GPS coordinates (decimal degrees) 35.35474, -120.04013 

Street Address 9640 Carrizo Highway, California Valley 

County San Luis Obispo 

Distance to roadways (meters) 38 

Traffic count (AADT, year) 420 (2011) 

Groundcover (e.g. asphalt, dirt, sand) Vegetated 

Representative statistical area name (i.e. MSA, CBSA, 

other) 

SAN LUIS OBISPO – PASO ROBLES 

(MSA) 

Pollutant, POC O3, 1 

Parameter code 44201 

Basic monitoring objective(s) NAAQS 

Site type(s) Regional Transport, General/Background

Monitor type(s) SLAMS 

Instrument manufacturer and model API 400A 

Method code 087 

FRM/FEM/ARM/other FEM 

Collecting Agency SLOAPCD 

Analytical Lab (i.e. weigh lab, toxics lab, other) N/A 

Reporting Agency SLOAPCD 

Spatial scale (e.g. micro, neighborhood) Regional 

Monitoring start date (MM/DD/YYYY) 1/1/2006 

Current sampling frequency (e.g. 1:3, continuous) continuous 

Calculated sampling frequency (e.g. 1:3/1:1) N/A 

Sampling season (MM/DD-MM/DD) 01/01-12/31 

Probe height (meters) 4.6 

Distance from supporting structure (meters) 1.0 

Distance from obstructions on roof (meters) N/A 

Distance from obstructions not on roof (meters) N/A

Distance from trees (meters) N/A 

Distance to furnace or incinerator flue (meters) N/A 

Distance between collocated monitors (meters) N/A 

Unrestricted airflow (degrees) 360 

Probe material for reactive gases (e.g. Pyrex, stainless 

steel, Teflon) 

Teflon 

Residence time for reactive gases (seconds) 2.7 

Will there be changes within the next 18 months? 

(Y/N) 

N 

Is it suitable for comparison against the annual 

PM2.5? (Y/N) 

N/A 

Frequency of flow rate verification for manual PM 

samplers 

N/A 

Frequency of flow rate verification for automated PM 

analyzers 

N/A 

Frequency of one-point QC check for gaseous Daily 
SLOAPCD 2013 Network Plan -C-18- May 2013 

Local site name Carrizo Plains 

instruments 

Last Annual Performance Evaluation for gaseous 

parameters (MM/DD/YYYY) 

6/14/2012 

(Anticipated 6/13/2013) 

Last two semi-annual flow rate audits for PM monitors 

(MM/DD/YYYY, MM/DD/YYYY) 

N/A