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Air Monitoring Instruments and Methods

Ambient Air Monitoring Methodologies

Criteria Pollutants
Pollutant/Parameter Units Automated
Continuous
(Hourly)
Manual Instrumentation
and
Methodology
EPA Reference
and/or
Equivalency
Designation
Every 6th Day
Midnight-Midnight
Every 3rd Day
Midnight-Midnight
Sulfur Dioxide (SO2) PPM X Thermo Electro (TECO)
Model 43C Pulsed Fluorescence
EQSA-0276-009
Sulfur Dioxide
(Low Level)
PPB X TECO Model 43S/43C
Pulsed Fluorescence
Oxides of Nitrogen
Nitric Oxide (NO)
Nitrogen Dioxide (NO2)
Total (NOx)
PPM X TEI Model 42/42C
Gas Phase Chemiluminescence
RFNA-0977-025
Carbon Monoxide (CO) PPM X TECO Model 48C
Gas Filter Correlation
Non-Dispersive Infrared
RFCA-0981-054
Ozone (O3) PPM X TECO Model 49C
Ultraviolet Light Absorption
EQOA-0880-047
PM2.5 Speciation
Ions, Metals, Carbon
µg/m³ X X Rupprecht & Patshnick 2300 Partisol


RFPS-0498-118
Fine Particulate Matter (PM2.5) µg/m³ X X Rupprecht & Patashnick TEOM 1400ab

Rupprecht & Patashnick 2025 Partisol



RFPS-0498-118
Inhalable
Particulates (PM10)
µg/m³ X X Rupprecht & Patashnick TEOM 1400ab

Wedding & Associates
Critical Flow Gravimetric
Quartz Filter
EQPM-1090-079

RFPS-1087-062
Inhalable
Particulates (PM10)
Sulfates (SO4)
Nitrates (NO3)
µg/m³ X Portion of PM10 Sample
treated chemically and
analyzed by ion chromatography
Total Suspended
Particulates (TSP)
µg/m³ X General Metal Works
Model GL2000 Gravimetric
Glass Fiber Filter
Total Suspended
Particulates (TSP)
Sulfates (SO4)
Nitrates (NO3)
µg/m³ X Portion of PM10 Sample
treated chemically and
analyzed by ion chromatography
Lead µg/m³ X General Metal Works
Model GL2000 Gravimetric
Glass Fiber Filter
Atomic Absorption
Trace Metals
Pollutant/Parameter Units Automated
Continuous
(Hourly)
Manual Instrumentation and Methodology

EPA Reference
and/or
Equivalency
Designation

Every 6th Day
Midnight-Midnight
Weekly
Arsenic µg/m³ X General Metal Works Model GL2000
Gravimetric
Glass Fiber Filter

Wedding & Associates

Inductively Coupled Plasma Emission
Cadmium µg/m³ X
Mercury µg/m³ X
Nickel µg/m³ X
Vanadium µg/m³ X
Toxics (Volatile Organic Compounds, VOCs)
Pollutant/Parameter Units Automated
Continuous
(Hourly)
Manual Instrumentation and Methodology

EPA Reference
and/or
Equivalency
Designation

Every 6th Day
Midnight-Midnight
Weekly
Methylene Chloride PPB X SUMMA Polished or
Glass-lined Canister
(TO-14)

Gas Chromatography
Mass Spectrometry
Chloroform PPB X
1,2 Dichloroethane PPB X
1,1,1-Trichloroethane PPB X
Carbon Tetrachloride PPB X
Trichloroethylene PPB X
1,1,2-Trichloroethane PPB X
Toluene PPB X
Tetrachloroethylene PPB X
Benzene PPB X
Ethylbenzene PPB X
Meta & Paraxylene PPB X
OrthoXylene PPB X
Chlorobenzene PPB X
1,3 Dichlorobenzene PPB X
1,4 Dichlorobenzene PPB X
1,2 Dichlorobenzene PPB X
Vinyl Chloride PPB X
1,2 Dichloropropane PPB X
1,2,4-Trimethylbenzene PPB X
1,3,5-Trimethylbenzene PPB X
1,1 Dichloroethene PPB X
Hexachloro-1,3-Butadiene PPB X
1,1 Dichloroethane PPB X
Chloromethane PPB X
Chloroethane PPB X
cis 1,2-Dichloroethene PPB X
cis 1,3-Dichloropropene PPB X
trans 1,3-Dichloropropene PPB X
Dichlorodifluoromethane PPB X
Trichlorofluoromethane PPB X
Trichlorotrifluoroethane PPB X
Dichlorotetrafluoroethane PPB X
1,2-Dibromoethane PPB X
A-chlorotouluene PPB X
1,1,2,2 Tetrachloroethane PPB X
Bromomethane PPB X
Styrene PPB X
Bromodichloromethane PPB X
1,3 Butadiene PPB X
Methyl Tert Butyl Ether PPB X
2 Chloroprene PPB X
Tribromomethane PPB X
1,2,4 Trichlorobenzene PPB X


Acid Deposition
Pollutant/
Parameter
Units Automated
Continuous
(Hourly)
Manual Instrumentation
and
Methodology
EPA Reference
and/or
Equivalency
Designation
Every 6th Day
Midnight-Midnight
Weekly
Precipitation Inches X Belfort Model 3200 Hi-Capacity
Precipitation Gauge

Sierra Misco
Model 2500E
Tipping Bucket, Rain Gauge
Precipitation Inches X Viking Environmental Instruments, Inc.
Hyetometer Automatic Sensing Wet/Dry Collector
Water Bath X Precision Scientific
Microprocessor Controlled 280 Series Water Bath
pH pH units X Thermo Orion
PerpHect Epoxy ATC - 927005
Rosscombination pH - 8102BN
Conductivity µs/cm X Thermo Orion Conductivity Cell -
013005D Dura Probe
Anions
Fluoride
Chloride
Bromide
Nitrite
Nitrate
Sulfate
Ortho-phosphate
i ppm X Dionex Model 500DX
AS Auto Sampler
AS50 Thermal Compartment
EG49 Eluent Generator
CD 20 Conductivity Detector
IP25 Isocratic Pump
Cations
Sodium
Ammonium
Potassium
Calcium
Magnesium
Meteorology
Pollutant/
Parameter
Units Automated
Continuous
(Hourly)
Manual Instrumentation
and
Methodology
EPA Reference
and/or
Equivalency
Designation
Every 6th Day
Midnight-Midnight
Weekly
Wind Direction Degrees (Azimuth) X Climatronics or Met One
Sonic Sensors
Wind Speed MPH
Wind Sigma (Horizontal) Degrees (Azimuth)
Precipitation Inches X

Belfort Model 3200 Hi-Capacity
Precipitation Gauge

Sierra MISCO Model 2500E or

MRI Model 302
Tipping Bucket Rain Gauge

Temperature °F X Teledyne Geotech Model T-200; or
Bristol Model 9Q6; or
Climatronics Model P/N 100826
Thermistor Bridge or Platinum RTD
Dew Point °F X Teledyne Geotech
Model DP200B Lithium Chloride Bobbin
Relative Humidity X Teledyne Geotech
Model RH200 Helical Hydroscopic LVDT
Barometric Pressure Inches of Mercury X Teledyne Geotech
Model BP300 Capsular - LVDT