HJ 2.2-2018 in English
VALIDTechnical guidelines for environmental impact assessment - Atmospheric environment
- Issued on:2018-07-31
- Implemented on:2018-12-01
- File Format:PDF
- Delivery:Via email within 5 business days
$970.00
Introduction
Background of Standard Revision and Technological Evolution
HJ 2.2-2018 is the second revision of the 2008 version of the guidelines. It mainly responds to the requirements of laws and regulations such as the Air Pollution Prevention and Control Law, and strengthens the evaluation of secondary pollutants and the management of compliance areas. This revision highlights three major technological breakthroughs:
- Evaluation method optimization: simplify the three-level evaluation process, and add secondary PM2.5 and O3 prediction methods
- Management requirements refinement: distinguish the evaluation requirements for compliance/non-compliance areas, and improve the pollutant emission accounting system
- Model system expansion: introduce the CALPUFF model to deal with special meteorological conditions, and add a photochemical grid model
Core content analysis
New rules for evaluation grade determination
| Evaluation grade | Determination conditions (Pmax) | Typical applicable scenarios |
|---|---|---|
| Level 1 | ≥10% | Industrial projects with SO2+NOx≥500t/a |
| Level 2 | 1%-10% | New urban expressway projects |
| Level 3 | <1% | Small-scale technological transformation projects |
Note: Multi-source projects in high-energy-consuming industries need to be automatically upgraded for evaluation
Secondary pollutant evaluation requirements
When the coefficient method is used in the AERMOD model to estimate secondary PM2.5, please note:
- The default conversion coefficient for SO2 is 0.58, and that for NOx is 0.44
- When the emission is ≥500t/a, the secondary PM2.5 must be evaluated
- The planned project needs to simultaneously evaluate the O3 generation potential
Implementation suggestions
Key points for data collection
- Meteorological data: Priority should be given to using the observation data of the National Meteorological Station for one year in a row; complex terrain requires verification of the WRF simulation results
- Pollution source list: New projects shall be calculated according to the technical specifications of the pollution discharge permit; renovation and expansion projects shall verify the existing source strength
Responses to common problems
| Problem type | Solution |
|---|---|
| Heavy smoke phenomenon on the shore | Use CALPUFF model to simulate, grid resolution ≤500m |
| Building downwash impact | Input GEP chimney height calculation formula: H=Hb+1.5L |
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