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  • FAQS
 
| Last Updated:: 28/12/2011

FAQS

Q. What does ENVIS stands for?
Ans: Environmental Information System.

 

Q. What is ENVIS?
Ans: "ENVIS is a decentralised system with a network of distributed subject oriented Centres ensuring integration of national efforts in environmental information collection, collation, storage, retrieval and dissemination to all concerned. Presently the ENVIS network consists of Focal Point at the Ministry of Environment and Forest and ENVIS Centres setup in different organisations/establishments in the country in selected areas of environment. These Centres have been set up in the areas of pollution control, toxic chemicals, central and offshore ecology, environmentally sound and appropriate technology, bio-degradation of wastes and environment management, etc.
ENVIS focal point ensures integration of national efforts in environmental information collection, collation, storage, retrieval and dissemination to all concerned. "

 

Q. What are the main objectives of MINENVIS ?
Ans: "The Primary Objective of this Centre is to Collect, collate, store and disseminate information related to mining environment. Other important Objectives include:

  • Maintaining Computerised Database on published literature on various subject areas related to mining environment which users can query from time to time.
  • Development of a Documentary resource base which will have environmental journals, environmental reports/technical papers, books related to mining environment, seminar proceedings or any other relevant document related to mining environment which user can consult by personal visit or through post requesting for specific information.
  • Organizing short-term training programmes/workshops to increase environmental awareness in the mining industry."

 

Q. What are the activities of ENVIS Centre, MINENVIS ?
 

Ans: Maintains a database management system to cater to the requirements of various users/ stakeholders of the mineral industry and regularly publishes Newsletters and Monographs.

 

Q. Total production of coal?
Ans:  Production of Coal during 2010-11 is  537 Million tones

 

Q. Coal production in India year wise?
Ans:  Production of Coal

 

Mineral Unit 2006-07 (R)
2007-08 (R)
2008-09 (R)
2009-10 (R)
2010-11(R)
Qty
Value
Qty Value
Qty Value Qty Value Qty Value
Coal M.ton 431 34836.79 457 38464.56 493 45537.02 532 49081.52 537 49011.64

 

(R) - Revised figures; (P) - Provisional and based on monthly returns to the extend available with IBM;
(E) - Estimated figures; M.Ton - Million tonnes
(Value in Rs. Crores)

 

Q. Ambient Noise Standards
Ans: Noise (ambient standards) published in the Gazette No. 643 dt 26.12.89, succeeded by The Noise pollution (Regulation and Control) rules, 2000 (Gazette of India, vide SO123(E), dated 14.2.2000 and subsequent amended vide SO 1046(E) dated, 22.11.2000).

 

Area Code Category of area Limits in dB (A) Leq
Day time Night time
A Industrial area 75 70
B Commercial area 65 55
C Residential area 55 45
D Silence zone 50 40

 

Note-1: Day time reckoned in between 6.00 am to 9.00p.m
Note 2: Night time reckoned in between 9.00p.m. to 6.00am
Note 3: Silence zone is defined as areas up to 100 meter around such premises as Hospitals, Educational institutes, and Courts. The Silence zones are to be declared by the competent authority.
Note 4: Mixed categories of areas should be declared as "one of the four above mentioned categories" by the Competent Authority and the corresponding standards shall be applied.

 

Q. Please write us ‘Air quality standards for mining areas’


Ans:    Air quality standards for mining areas

 

Category Pollutant Time weighted average Concentration in Ambient Air Method of Measurement
( I ) Category Pollutant Time weighted average Concentration in Ambient Air Method of Measurement Suspended Particulates Matter (SPM) Annual Average*
24 hours**
360 µg/m3
500 µg/m3
High Volume Sampling (Average flow rate not less than 1.1 m3/minute)
Respirable Particulate Matter (size less than 10 µm) (RPM) Annual Average*
24 hours**
180 µg/m3
250 µg/m3
Respirable Particulate Matter sampling and analysis
Sulphur Dioxide (SO2) Annual Average*
24 hours**
80 µg/m3
120 µg/m3
1. Improved West and Gaeke method
2. Ultraviolet fluorescence
Oxide of Nitrogen as NO2 AnnualAverage*
24 hours**
AnnualAverage*
24 hours**
80 µg/m3
120 µg/m3
1. Jacob & Hochheiser Modified (Na-Arsenic) Method
2. Gas phase Chemilumine-scence
( II ) Existing coal fields/mines given below:
Karanpura,  Ramgarh, Giridih, Rajhara,  Wardha, Nagpur,  Silewara, Pench Kanhan, Patharkhera, Umrer, Korba, Chirimiri, Central India Coalfields (including Baikunthapur, Bisrampur), Singrauli,  Ib Valley, Talcher, Godavary-Valley and any other coalfield
Suspended Particulates Matter (SPM) Annual Average*
24 hours**
430 µg/m3
600 µg/m3
High Volume Sampling (Average flow rate not less than 1.1 m3/minute)
Respirable Particulate Matter (size less than 10 µm) (RPM) 215 µg/m3
300 µg/m3
Respirable Particulate Matter sampling and analysis Respirable Particulate Matter sampling and analysis
Sulphur Dioxide (SO2) Annual Average*
24 hours**
80 µg/m3
120 µg/m3
1. Improved West and Gaeke method
2. Ultraviolet fluorescence
Oxide of Nitrogen as NO2 Annual Average*
24 hours**
80 µg/m3
120 µg/m3
1. Jacob & Hochheiser Modified (Na-Arsenic) Method
2. Gas phase Chemiluminescence
( III ) Coal mines located in the coal- fields of- Jharia- Raniganj- Bokaro Suspended Particulates Matter (SPM) Annual

Average

*24 hours**
500 µg/m3

700 µg/m3
High Volume Sampling (Average flow rate not less than 1.1 m3/minute)
Respirable Particulate Matter (size less than 10 µm) (RPM) Annual

Average

*24 hours**
250 µg/m3



300 µg/m3
Respirable Particulate Matter sampling and analysis
Sulphur Dioxide (SO2) Annual

Average

*24 hours**
80 µg/m3



120 µg/m3
1. Improved West and Gaeke method
2. Ultraviolet fluorescence
Oxide of Nitrogen as NO2 Annual Average
*24 hours**
80 µg/m3
120 µg/m3
1. Jacob & Hochheiser Modified (Na-Arsenic) Method
2. Gas phase Chemiluminescence

 

Note: * Annual Arithmetic mean for the measurements taken in a year, following the guidelines for frequency of sampling laid down in clause 2.
** 24 hourly/8 hourly values shall be met 92% of the time in a year. However, 8% of the time it may exceed but not on two consecutive days.
Unauthorised construction shall not be taken as a reference of nearest residential or commercial place for monitoring.

 

Q. What are standards for effluents for coal mines to be discharged
Ans:    Standards for Effluents for Coal mines to be discharged into Sewer, Stream, or Lands

S.N. Parameters  Concentration not to exceed.
 1 pH  5.5 to 9.0
 2  Chemical Oxygen Demand (COD)  250 mg/L
 3  Total Suspended Solids (TSS)  100 mg/L-200 mg/L (Land for irrigation)
 4  Oil & Grease (O&G)  10 mg/L

 

(Monitoring frequency of these parameters shall be once in a fortnight)
Optional parameters: All other parameters indicated in the general standards for discharge of environment pollutants under Schedule VI, shall be in addition to the effluent standards specified under clause 3. (Monitoring frequency shall be once in a year for the optional parameters).

 

Q. What is physical properties of water


Ans:    Physical Properties of Water

 

Density (25 oC), kg/m3 997.075
Density (20 oC), kg/m3 998.20
Density (100 oC), kg/m3 958.40
Maximum density, kg/m3 1000.00
Temperature of maximum density, oC 3.94
Viscosity (25 oC), Pa/s 0.890 x 10-3
Kinematic viscosity (25 oC), m2/s 0.89 x 10-6
Melting point (101, 325 Pa), oC 0.00
Boiling point (101, 325 pa), oC 100.00
Latent heat of ice, kJ/mol 6.0104
Latent heat of evaporation, kJ/mol 40.66
Specific heat capacity (15 oC), J/kg.oC 4186
Thermal conductivity (25 oC)m, J/cm.s.oC 0.00569
Heat of vaporization, J/kg 2.435 x 106
Surface tension (25 oC), N/m 71.97 x 10-3
Surface tension (20 oC), N/m 72.75 x 10-3
Surface tension (0 oC), N/m 75.64 x 10-3
Dielectric constant (25 oC) 78.54
Vapour pressure (20 oC), torr 17.535

 

Q. water quality criteria for bathing mine water


Ans: Primary Water Quality Criteria for Bathing Water

 

CRITERIA RATIONALE
1) Fecal Coliform MPN/100 ml 500 (desirable)2500 (Maximum permissible) To ensure low sewage contamination. Fecal coliform and fecal streptococci are considered as they reflect the bacterial pathogenicity.
2) Fecal Streptococci MPN/100 ml 100 (desirable)500 (Maximum Permissible) The desirable and permissible limits are suggested to allow for fluctuation in environmental conditions such as seasonal change, changes in flow conditions etc.
3) pH Between 6.5-8.5 The range provides protection to the skin and delicate organs like eyes, nose, ears etc. which are directly exposed during outdoor bathing.
4)  Dissolved Oxygen: 5 mg/L or more The minimum dissolved oxygen concentration of 5 mg/l ensures reasonable freedom from oxygen consuming organic pollution immediately upstream which is necessary for preventing production of anaerobic gases (obnoxious gases) from sediment.
5) Biochemical Oxygen demand 3 day, 270C 3 mg/L or less The Biochemical Oxygen Demand of 3 mg/l or less of the water ensures reasonable freedom from oxygen demanding pollutants and prevent production of obnoxious gases".