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South Coast AQMD 

Site Survey Report for Los Angeles-North Main Street 

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 Elevation

1630 North Main Street 

Los Angeles, CA 90012 Los Angeles South Coast 34° 03' 59" 118° 13' 36" 89 
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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 Site: 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 Logbook Up To Date: Yes 

Action Items

Comments
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Detailed Site Information 

Site Name Los Angeles-North Main Street 

AQS ID (AIRS #) 060371103 

GIS coordinates Latitude: 34° 03’ 59” Longitude: 118° 13’ 36” 

Location DWP General Warehouse Building 

Address 1630 North Main Street, Los Angeles, CA 90012 

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-Santa Ana, CA MSA 

Pollutant Carbon Monoxide Nitrogen Dioxide Ozone Sulfur 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 400E 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 
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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 (Lead) – 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 300-310 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 
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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 
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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 
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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 920 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 
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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 
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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 
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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. 
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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.