Chapter-III(59-80) - Pollution Control Board, Assam

EIA & RA STUDY FOR NAPHTHA SPLITTER PROJECT AT NUMALIGARH REFINERY LIMITEDBaseline Environmental StatusTABLE - 3.48Noise level inside refinery complex(Industrial Area)Monitoring Period: December, 2007 to February, 2008Time: Hours NS1 NS2 NS3 NS4 NS5 NS66.00 59.1 58.3 55.7 55.9 57.7 58.87.00 60.2 59.4 56.8 57.0 58.8 59.98.00 64.3 61.7 59.1 59.3 61.1 62.29.00 65.8 63.1 59.8 60.0 62.5 61.810.00 66.7 64.0 60.8 61.1 63.4 62.711.00 64.2 64.1 61.7 62.0 63.5 62.812.00 64.3 63.4 61.8 62.1 62.8 62.913.00 67.0 64.3 62.7 63.0 63.7 63.814.00 68.1 65.4 63.8 64.1 64.8 64.915.00 67.2 66.3 65.5 65.8 65.7 65.816.00 70.0 67.3 66.5 66.8 66.7 67.917.00 69.0 66.3 65.5 65.8 65.7 66.918.00 66.1 65.2 64.4 64.7 64.6 65.819.00 63.9 64.3 63.5 63.8 63.7 63.820.00 59.5 62.9 60.5 60.8 62.3 62.421.00 55.1 61.5 58.6 58.4 60.9 61.022.00 54.1 60.5 57.6 57.4 59.9 60.023.00 52.1 59.6 56.7 56.5 59.0 59.124.00 51.2 58.7 55.8 55.6 58.1 58.21.00 50.1 57.6 55.5 55.3 57.0 57.12.00 49.1 56.6 54.5 54.3 56.0 56.13.00 48.8 56.3 54.2 54.0 55.7 55.84.00 48.1 55.6 53.5 53.3 55.0 55.15.00 46.8 54.3 53.0 52.8 53.7 53.824 hrs. Average 59.6 61.5 59.5 59.6 60.9 61.2Day (Max.) 70.0 67.3 66.5 66.8 66.7 67.9Day (Min.) 54.1 58.3 55.7 55.9 57.7 58.8Night (Max.) 59.1 60.5 57.6 57.4 59.9 60.0Night (Min.) 46.8 54.3 53 52.8 53.7 53.8Projects & Development India Limited, Sindri Page 74 of 80