Standards for Ambient Air, Noise Emission & Effluents - 2 | Environmental Engineering - Civil Engineering (CE) PDF Download

PART-D: CONCENTRATION BASED STANDARDS

1. General Emission Standards

2. Equipment based standards

For dispersion of sulphur dioxide; a minimum stack height limit is accordingly prescribed as below:

Note: H=Physical height of the stack in metre; Q=Emission rate of SO2 in kg/h.

3. Load/Mass Based Standards

Note: VSS = vertical stud soderberg; HSS = horizontal stud soderberg; PBSW = pre backed side work; and PBCW = pre backed centre work

PART-E NOISE STANDARDS

A. Noise limits for automobiles (from at 7.5 meter in dB(A) at the manufacturing stage)

AA. Noise limits for vehicles at manufacturing stage

The test method to be followed shall be IS:3028-1998.

(1) Noise limits for vehicles applicable at manufacturing stage from the year 2003

(2) Noise limits for vehicles at manufacturing stage applicable on and from 1st April, 2005

B. Domestic appliances and construction equipments at the manufacturing stage to be achieved by 31st December, 1993.

ANNEXURE-I (For the purpose of Parts-A, B and C)

The state boards shall fallow the following guidelines in enforcing the standards specified under Schedule IV.

1. The wastewater and gases are to be treated with the best available technology (BAT) in order to achieve the prescribed standards.

2. The industries need to be encouraged for recycling and reuse of waste materials as far as practicable in order to minimize the discharge of wastes into the environment.

3. The industries are to be encouraged for recovery of biogas, energy and reusable materials.

4. While permitting the discharge of effluents and emissions into the environment, State Boards have to be take into account the assimilative capacities of the receiving bodies, especially water bodies so that quality of the intended use of the receiving waters is not affected. Where such quality is likely to be affected, discharges should not be allowed into water bodies.

5. The central and state boards shall put emphasis on the implementation of clean technologies by the industries in order to increase fuel efficiency and reduce the
 generation of environmental pollutants.

6. All efforts should be made to remove color and unpleasant odor as far as practicable.

7. The standards mentioned in this Schedule shall also apply to all other effluents discharged such as mining, and mineral processing activities and sewage.

8. The limit given for the total concentration of mercury in the final effluent of caustic soda industry, is for the combined effluent from (a) cell house; (b) brine plant; (c)
 chlorine handling; (d) hydrogen handling; and (e) hydrochloric acid plant.

9. All effluents discharged including from the industries such as cotton textile, composite woolen mills, synthetic rubber, small pulp & paper, natural rubber,
 petrochemicals, tanneries, paint, dyes, slaughter houses, food & fruit processing and dairy industries into surface waters shall conform to the BOD limit specified above,
 namely, 30 mg/L. For discharge of an effluent having a BOD more than 30 mg/L, the standards shall conform to those given above for other receiving bodies, namely,
 sewers, coastal waters and land for irrigation.

10. Bio-assay shall be made compulsory for all the industries, where toxic and non biodegradable chemicals are involved.

11. In case of fertilizer industry, the limits in respect of chromium and fluoride shall be complied with at the outlet of chromium and fluoride removal units respectively.

12. In case of pesticides.
 a. The limits should be complied with at the end of the treatment plant before dilution.
 b. Bio-assay test should be carried out with the available species of fish in the receiving water, the COD limits to be specified in the consent conditions should be correlated with the BOD limits.
 c. In case metabolites and isomers of the pesticides in the given list are found insignificant concentrations, standards should be prescribed for these also in the
 same concentration as the individual pesticides.
 d. Industries are required to analyze pesticides in wastewater by advanced analytical methods such as GLC/HPLC.

13. The chemical oxygen demand (COD) concentration in a treated effluent, if observed to be persistently greater than 250 mg/L before disposal to any receiving body (public sewer, land for irrigation, inland surface water and marine coastal areas), such industrial units are required to identify chemicals causing the same. In case these are found to be toxic as defined in the Schedule - I of the Hazardous Rules, 1989, the state boards in such cases shall direct the industries to install tertiary treatment stipulating time limit.

14. Standards specified in Part A of Schedule - VI for discharge of effluents into the public sewer shall be applicable only if such sewer leads to a secondary treatment including biological treatment system otherwise the discharge into sewers shall be treated as discharge into inland surface waters.