Hot mix plant

1. 1996 Supreme Court Judgement key
excerpt:
"The process emissions from hot mix plants contain particulate matter and sulphur dioxide
besides polyaromatic hydrocarbons, most of which are proven carcinogens. Therefore, the
Expert Committee of CPCB has categorised hot mix plants as hazardous industry (Ha Category).
As per Master Plan 2001, all hazardous/noxious industries should be shifted out of the UT of
Delhi Most of the hot mix plants belonging to government as well as private sectors are located
near residential areas and therefore, such installations pose severe health risks to inhabitants
nearby (Lal Kuan, Rangpuri, Mehrauli, Khyalla) The general housekeeping of most of the hot
mix plants is poor with no concern for environmental protection The emission data of a hot mix
plant equipped with pollution control device and the ambient air quality data near the hot mix
plant, as reported, speak of severe pollution due to particulate matter beyond prescribed limit
Regarding the question of temperature fall of hot mix during transportation to long distances,
it is the considered opinion of the Expert Committee that even if hot mix plants are located
outside Delhi, except during severe winter, the quality of mix is not expected to fall if the 5
desired temperature of the hot mix containers are maintained. Therefore, relocation of hot mix
plants will not pose any service problem."
As per the court order issued in 1996, all 47 hot mix plants then working in UT of Delhi were
ordered to be shifted to industrial zones situated at 25km away from Delhi.
This judgement was made after a detailed study by the Central Pollution Control Board (CPCB)
through a high level expert committee.

2. Airport Case 1999
• Case between Airport Authority of India and M.C. Mehta.
• In the national interest permission to setup Hot mix plant (HMP) in Delhi was
granted under the following conditions.
• The Airports Authority of India shall, after finalising the tenders and awarding the
contract for resurfacing of Runways, allow the setting up of Hot Mix Plants in the
safe vicinity of IGI Airport at least at a distance of 3 kms. from a populated area.
• The Hot Mix Plants set up by the company whose tender is accepted would be
examined by the Central Pollution Control Board on the environmental feasibility,
especially to ensure that the particulate matter emission does not exceed the
prescribed limit of 150 micro gram/Nm3 under the Rules made under the E.P. Act.
• The Hot Mix Plants shall be operated for a period of one year from the date on
which these are installed or till the resurfacing of the Runways is done and
completed, whichever is earlier.

3. Latest Gujarat Pollution Board Guidelines

4. Ministry of Environment guidelines to NHAI on installation of Hot Mix Plant

6. AIR POLLUTION (PARTICULATE MATTER) FROM HOT-MIX PLANTS IS above
200 micro gram/m3 well over the national air quality standards of 100 micro
gram/m3 and WHO standards of 50 micro gram/m3.
Kerala Pollution Board guideline for particulate matter is 200 micro
gram/m3.