Particulate Matter (PM2.5 & PM10)
Respirable and fine particulate concentration measured using calibrated High-Volume Air Samplers (RDS) and PM2.5 samplers under IS 5182 (Part 23 & Part 24).
Rispri Laboratory · NABL & CPCB Recognized Scope
Air Quality & Stack Emission Monitoring
Certified monitoring of ambient air (NAAQS 12 parameters), industrial chimney stack emissions, workzone air toxicity (OSHA/Factories Act), and DG set flue gas compliance.
NAAQS
Compliant Testing
NAAQS 2009 Standards
Ambient Air Quality Monitoring (NAAQS 2009 Standards)
24-hour continuous and periodic ambient air sampling for industrial plant boundaries, commercial complexes, construction sites, and environmental baseline studies for EIA clearance.
Gaseous Pollutants (SO2, NOx, CO, Ozone)
Sulphur Dioxide (West-Gaeke method), Nitrogen Dioxide (Jacob & Hochheiser method), Carbon Monoxide (NDIR analysis), and Ozone (Chemical method).
| Air Parameter | Measurement Method | Industrial Zone Limit (24h) | Ecological Zone Limit (24h) |
|---|---|---|---|
| PM 10 (µg/m³) | IS 5182 (Part 23) Gravimetric | 100 µg/m³ | 100 µg/m³ |
| PM 2.5 (µg/m³) | Gravimetric Fine Particulate | 60 µg/m³ | 60 µg/m³ |
| Sulphur Dioxide SO2 | IS 5182 (Part 2) Improved West-Gaeke | 80 µg/m³ | 80 µg/m³ |
| Nitrogen Dioxide NO2 | IS 5182 (Part 6) Jacob & Hochheiser | 80 µg/m³ | 80 µg/m³ |
| Carbon Monoxide CO | NDIR Spectrophotometric | 4.0 mg/m³ (1h) | 4.0 mg/m³ (1h) |
| Lead (Pb) & Heavy Metals | AAS / ICP-OES Acid Digestion | 1.0 µg/m³ | 1.0 µg/m³ |
Isokinetic Chimney Audits
Industrial Chimney Stack Emission Audits
Isokinetic stack sampling and flue gas analysis for industrial boilers, furnaces, kilns, incinerators, and thermic fluid heaters to verify particulate matter and toxic gas discharge rates against SPCB Consent standards.
Isokinetic Stack Sampling Protocol
Our field sampling teams utilize heated probes, thimble holders, multi-stage impingers, and calibrated dry gas meters to ensure accurate velocity and mass flow measurements under actual stack temperature and pressure conditions.
- Total Particulate Matter (TPM) mg/Nm³
- Sulphur Dioxide (SO2) & Nitrogen Oxides (NOx) emission loads
- Carbon Monoxide (CO) & Carbon Dioxide (CO2) percent volume
- Flue Gas Velocity (m/s), Temperature (°C) & Volumetric Flow (Nm³/hr)
- Acid Mist, Chlorine, Fluoride, and Heavy Metals in stack gases
100+
Stack Audits Performed Annually
NABL
Approved Sampling Rig
OSHA & Factories Act Compliance
Occupational Workzone Toxic Gas Exposure
Workplace air quality evaluation inside manufacturing halls, chemical synthesis plants, paint booths, and storage yards under the Factories Act 1948 (Schedule II) and OSHA Permissible Exposure Limits (PEL).
Volatile Organic Compounds (VOCs)
Benzene, Toluene, Xylene, Ethylbenzene, Solvents (GC-FID / Photoionization PID detection).
Inorganic Toxic Vapours
Chlorine (Cl2), Ammonia (NH3), Hydrogen Sulphide (H2S), Acid Mists (HCl, H2SO4, HNO3).
Workplace Dust Load
Total Respirable Dust, Silica Dust, Wood Dust, Fiber count for asbestos/textile workers.
CPCB II / CPCB IV+ Norms
DG Set & Boiler Exhaust Gas Analysis
Exhaust gas testing for Diesel Generator sets (from 15 kVA to 2500 kVA) to verify compliance with CPCB II and CPCB IV+ emission standards and noise boundary limits.
DG Set Exhaust Smoke Density
Hartridge smoke units (HSU) / Bosch smoke number measurement under full electrical load.
Gaseous Emissions (NOx + HC + CO)
High-precision electrochemical and NDIR analyzers to calculate g/kWh mass emission values.
Acoustic Enclosure Insertion Loss
Measurement of sound attenuation across DG acoustic canopy under rated load conditions.