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Quality Assurance 

Site Survey Report for Mission Viejo 

Last updated March 2009 

 

AIRS Number ARB Number Site Start Date Reporting Agency and Agency Code 

060592022 30002 06/99 South Coast AQMD (061)

Site Address County Air Basin Latitude Longitude Elevation

26081 Via Pera 

Mission Viejo, CA 92691 Orange South Coast 33° 37' 89" 117° 40' 33" 168 
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Site Survey Report 

 

Siting Information 

 Site Name: Mission Viejo Date: 03/10/09 State Code: 30002 AIRS Number: 060592022 

 Latitude: 33° 37' 48" Longitude: 117° 40' 33" Elevation (m): 168 Address: 26081 Via Pera 

 Mission Viejo, CA 92691 Senior AQIS: Albert Dietrich Site Technician: Tom Mac Site Phone: (949) 768-8111 

Operating Agency: South Coast AQMD 

General Siting Conditions 

Station Temperature Traffic Topography Predominant Wind Direction: W 

 Controlled: Yes Description: Arterial Site: Level Arc Air Flow (Deg): 360 Degrees 

 Recorded: Yes Distance: 200 meters Region: Hilly Probe Last Cleaned: May 2008 

 Count (Veh/Day): 42400 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 Logbook Up To Date: Yes 

Action Items 

 

 

Comments 

 

 
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Detailed Site Information 

Site Name Mission Viejo 

AQS ID (AIRS #) 060592022 

GIS coordinates Latitude: 33° 37’ 48” Longitude: 117° 40’ 33” 

Location El Toro Water District Filter Plant 

Address 26081 Via Pera, Mission Viejo, CA 92691 

County Orange 

Dist. to road 200 meters 

Traffic count 42,400 veh/day 

Groundcover Asphalt 

PEP audit? 

NPAP audit? 11/19/07 

Flow audit? 01/07 

Representative Area 31100-Los Angeles-Long Beach-Santa Ana, CA MSA 

Pollutant Carbon Monoxide Ozone PM10-SSI PM2.5 

Monitor obj REPRESENTATIVE 

CONCENTRATION 

REPRESENTATIVE 

CONCENTRATION 

REPRESENTATIVE 

CONCENTRATION 

REPRESENTATIVE 

CONCENTRATION 

Spatial scale Neighborhood Scale Neighborhood Scale Neighborhood Scale Neighborhood Scale 

Sampling method Horiba APMA 360 API/400E Sierra Andersen 1200 Andersen 300 RAAS 

2.5 

Serial # 577274014 527-S N/A 361 

Property # 16478 N/A 3981 E000019 

Last Calibration Date 06/26/08 06/25/08 01/29/09 02/04/09 

Analysis method N/A N/A Weighed by 

SCAQMD lab 

Weighed by 

SCAQMD lab 

Start date 06/15/99 06/15/99 06/15/99 06/15/99 

Operation schedule 1:1 1:1 1:6 1:3 

Sampling season All Year All Year All Year All Year

Probe height 6.7 6.7 3.4 3.8 

Distance from 

supporting structure 

2.4 2.4 2.4 2.9 

Distance from 

obstructions on roof 

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

Distance from 

obstructions not on 

roof 

N/A N/A 4.8 4.8 

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 270° 270° 

Probe material Teflon Teflon N/A N/A 

Residence time 11.1 11.4 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 Yes 
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Frequency of flow 

rate verification for 

manual PM samplers 

audit 

N/A 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) 

Nightly Nightly N/A N/A 

Last Annual 

Performance 

Evaluation (gaseous) 

01/30/07 01/30/07 N/A N/A 

Last two semi-annual 

flow rate audits for 

PM monitors 

N/A N/A 05/07, 11/07 05/07, 11/07 
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Mission Viejo 

Site Photos 

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

Looking South from the probe. Looking West from the probe. 
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Mission Viejo 

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.