ENVIRONMENTAL STANDARDS

STANDARDS APPLICABLE TO THE COAL MINES

1) Air Quality – (i) Work zone –Standards for Coal Mines issued by MoEF, GSR-742 E dt. 25.09.2000

(ii) Residential category – National Ambient Air Quality standards issued by CPCB, GSR 176 dt. 02.04.1996.

2) Water Quality – (i) Mine discharge / Workshop / Colony effluents – Standards for Coal Mines issued by MoEF, GSR-742 E dt. 25.09.2000 and GSR-801 (E), EPA, 1986, dt.31.12.1993.

(ii) Ground Water – BIS 105000 : 1991

(iii) Surface Water – BIS 2296 : 1982

A. STANDARDS FOR COAL MINES (Stipulated by Ministry of Environment and Forests (MoEF), Vide Notification No. GSR 742(E), Dt: 25.09.2000)

I. AIR QUALITY STANDARDS:

(a) Standards

Pollutant	Time weighted Average	Concentration in Ambient Air
		New Coal Mines (commenced after 25.09.2000)	Existing Coal Mines (commenced prior to 25.09.2000)
Suspended Particulates Matter (SPM)	Annual Average 24 hours	360 µg/m^3 500 µg/m^3	430 µg/m^3 600 µg/m^3
Respirable Particulate Matter (size less than 10 µm) (RPM)	Annual Average 24 hours	180 µg/m^3 250 µg/m^3	215 µg/m^3 300 µg/m^3
Sulphur Dioxide (SO2)	Annual Average 24 hours	80 µg/m^3 120 µg/m^3	80 µg/m^3 120 µg/m^3
Oxides of Nitrogen as NO2	Annual Average 24 hours	80 µg/m^3 120 µg/m^3	80 µg/m^3 120 µg/m^3

Micro Gram / Cubic meter (µg/m³)

Note : -(i) Annual arithmatic mean of 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.

(ii) In case of residential or commercial or industrial place falls within 500 metres of any dust generating sources, the National Ambient Air Quality Standards shall be made applicable.

(b) Frequency

(1) Air quality monitoring at a frequency of once in a fortnight (24 hourly sampling) at the identified locations near the dust generating sources.

(2) As a result of monthly monitoring, if it is found that the concentration of the pollutants is less than the 50% of the specified standards for three consecutive months, then the sampling frequency may be shifted to two days in a quarter year.

(3) In case the value has exceeded the specified standards, the air quality sampling shall be done twice in a week. If the results of four consecutive weeks indicate that the concentration of pollutants is within the specified standards, then fortnightly monitoring may be reverted to.

II. EFFLUENT WATER QUALITY STANDARDS :

(a) Standards

pH -- 5.5 to 9.0

Chemical Oxygen Demand (COD) -- 250 mg/l

Total Suspended Solids (TSS) -- 100 mg/l

-- 200 mg/l (Land for irrigation)

Oil & Grease (O & G) -- 10 mg/l

Note: Milligrams / litre (mg/l)

(b) Frequency

Monitoring of these parameters shall be done at a frequency of once in a fortnight.

All the 33 Parameters as given in Part-A of General Standards for discharge of Environmental Pollutants, GSR 801 (E) EPA 1993, prescribed by CPCB shall be monitored once in a year.

III. NOISE LEVEL STANDARDS:

(a) Standards

Time duration: 6.00 A.M.- 10.00 P.M. 10.00 P.M. - 6.00 A.M

Noise Level: Leq 75 dB(A) Leq 70 dB(A)

Note : decibel (dB)

(b) Frequency

Monitoring frequency for noise levels shall be once in a fortnight.

Occupational exposure limit of noise specified by Director General of Mines Safety (DGMS) shall be complied with by the coalmines.

****

B. NATIONAL AMBIENT AIR QUALITY STANDARDS

Pollutants	Time-weighted average	Concentration in ambient air			Method of measurement
		Industrial Areas	Residential, Rural & other Areas	Sensitive Areas
Sulphur Dioxide (SO2)	Annual Average*	80 µg/m^3	60 µg/m^3	15 µg/m^3	-Improved West and Geake  Method - Ultraviolet Fluorescence
	24 hours**	120 µg/m^3	80 µg/m^3	30 µg/m^3
Oxides of Nitrogen as (NO2)	Annual Average*	80 µg/m^3	60 µg/m^3	15 µg/m^3	-Jacob & Hochheiser Modified (Na-Arsenite) Method -Gas Phase Chemiluminescence
	24 hours**	120 µg/m^3	80 µg/m^3	30 µg/m^3
Suspended Particulate Matter (SPM)	Annual Average*	360 µg/m^3	140 µg/m^3	70 µg/m^3	- High Volume Sampling, (Average flow rate not less than 1.1 m3/minute).
	24 hours**	500 µg/m^3	200 µg/m^3	100 µg/m^3
Respirable Particulate Matter (RPM) (size less than 10 microns)	Annual Average*	120 µg/m^3	60 µg/m^3	50 µg/m^3	-Respirable particulate matter sampler
	24 hours**	150 µg/m^3	100 µg/m^3	75 µg/m^3
Lead (Pb)	Annual Average*	1.0 µg/m^3	0.75 µg/m^3	0.50 µg/m^3	-ASS Method after Sampling using EPM 2000 or equivalent Filter paper .
	24 hours**	1.5 µg/m^3	1.00 µg/m^3	0.75 µg/m^3
Ammonia1	Annual Average*	0.1 mg/ m^3	0.1 mg/ m^3	0.1 mg/m^3	. .
	24 hours**	0.4 mg/ m^3	0.4 mg/m^3	0.4 mg/m^3
CarbonMonoxide (CO)	8 hours**	5.0 mg/m^3	2.0 mg/m^3	1.0 mg/ m^3	- Non Dispersive Infra Red (NDIR) Spectroscopy
	1 hour	10.0 mg/m^3	4.0 mg/m^3	2.0 mg/m^3
Note: * Annual Arithmetic mean of minimum 104 measurements in a year taken twice a week 24 hourly at uniform interval. ** 24 hourly/8 hourly values should be met 98% of the time in a year. However, 2% of the time, it may exceed but not on two consecutive days.

NOTE:

1. National Ambient Air Quality Standard: The levels of air quality with an adequate margin of safety, to protect the public health,, vegetation and property.
2. Whenever and wherever two consecutive values exceeds the limit specified above for the respective category, it would be considered adequate reason to institute regular/continuous monitoring and further investigations.
   [EPA Notification: GSR 176 (E), April 02, 1996]

(C) GENERAL STANDARDS* FOR DISCHARGE OF ENVIRONMENTAL POLLUTANTS
Part - A : Effluents

S. No.	Parameter	Inland surface water	Public sewers	Land for irrigation	Marine/coastalareas
.	2		3	.	.
.	.	(a)	(b)	(c)	(d)
1	Colour and odour	See 6 of Annexure-1I		See 6 of Annexure-1I	See 6 of Annexure-1I
2	Suspended solids mg/l, max.	100	600	200	(a) For process waste water (b) For cooling water effluent 10 per cent above total suspended matter of influent.
3	Particle size of suspended solids	shall pass 850 micron IS Sieve	-	-	(a) Floatable solids, solidsmax. 3 mm (b) Settleable solids, max 856 microns
4	pH value	5.5 to 9.0	5.5 to 9.0	5.5 to 9.0	5.5 to 9.0
5	Temperature	shall not exceed 5^oC above the receiving water temperature			shall not exceed 5oCabove the receiving water temperature
6	Oil and grease, mg/l max,	10	20	10	20
7	Total residual chlorine, mg/l max	1.0	-	-	1.0
8	Ammonical nitrogen (as N),mg/l, max.	50	50	-	50
9	Total kjeldahl nitrogen (as N);mg/l, max. mg/l, max.	100	-	-	100
10	Free ammonia (as NH3), mg/l,max.	5.0	-	-	5.0
11	Biochemical oxygen demand (3 days at 27^oC), mg/l, max.	30	350	100	100
12	Chemical oxygen demand, mg/l, max.	250	-	-	250
13	Arsenic(as As).	0.2	0.2	0.2	0.2
14	Mercury (As Hg), mg/l, max.	0.01	0.01	-	0.01
15	Lead (as Pb) mg/l, max	0.1	1.0	-	2.0
16	Cadmium (as Cd) mg/l, max	2.0	1.0	-	2.0
17	Hexavalent chro-mium (as Cr + 6),mg/l, max.	0.1	2.0	-	1.0
18	Total chromium (as Cr) mg/l, max.	2.0	2.0	-	2.0
19	Copper (as Cu)mg/l, max.	3.0	3.0	-	3.0
20	Zinc (as Zn) mg/l, max.	5.0	15	-	15
21	Selenium (as Se)	0.05	0.05	-	0.05
22	Nickel (as Ni) mg/l, max.	3.0	3.0	-	5.0
23	Cyanide (as CN) mg/l, max.	0.2	2.0	0.2	0.2
24	Fluoride (as F) mg/l, max.	2.0	15	-	15
25	Dissolved phos- phates (as P),mg/l, max.	5.0	-	-	-
26	Sulphide (as S) mg/l, max.	2.0	-	-	5.0
27	Phenolic compounds (as C6H50H)mg/l, max.	1.0	5.0	-	5.0
28	Radioactive materials: (a) Alpha emitters micro curie mg/l, max. (b)Beta emittersmicro curie mg/l	10^-710^-6	10^-7 10^-6	10^-810^-7	10^-7 10^-6
29	Bio-assay test	90% suivival of fish after 96 hours in 100% effluent	90% suivival of fish after 96 hours in 100% effluen	90% suivival of fish after 96 hours in 100% effluen	90% suivival of fish after 96 hours in 100% effluen
30	Manganese	2 mg/l