chapter - 1 introduction - Meghalaya State Pollution Control Board

Hills Cement Co. Limited.
Table-3.11 AAQ Summary during Pre-monsoon Season (Dec’07–Mar’08)
Air Quality
Station
Mynkre
Code Particulars SPM RPM SO 2 NOx
A1
Minimum 87 16 3.9 7.4
Umlong
Umtyra
Lumshnong
Umshangiar
Umrasong
A2
A3
A4
A5
A6
Maximum 112 41 11.2 14.4
Minimum 62 17 3.2 4.5
Maximum 115 34 13 10
Minimum 87 18 3.1 4.8
Maximum 115 43 8.1 13.7
Minimum 89 22 4.0 13.3
Maximum 118 46 9.2 5.1
Minimum 87 46 3.5 4.5
Maximum 119 19 9.5 13.7
Minimum 89 16 4.5 5.1
Observations of Ambient Air Quality:
Maximum 115 43 11.3 13.7
The results of AAQ monitoring parameters are summarized in the preceding
table. The total 8 sampling locations within the study area are well within the
stipulated limits of NAAQ Standards. Locations in downwind direction were found
to have more concentrations of SPM and RPM as compared to crosswind
directions. The overall maximum concentration of SPM, RPM, SO 2 and NOx were
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are far below the detection limits.
Ambient air quality of the study area has been assessed during study period
through a network of 6 ambient air quality stations, which are shown in Table
3.12-3.17.
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