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

EIA & RA STUDY FOR NAPHTHA SPLITTER PROJECT AT NUMALIGARH REFINERY LIMITEDBaseline Environmental StatusTABLE - 3.49Ambient Noise Level in the Villages around Refinery(Residential Area)Monitoring Period: December, 2007 to February, 2008Time: Hours NS7 NS8 NS9 NS10 NS11 NS126.00 43.3 45.3 45.0 45.0 40.9 44.57.00 44.4 46.4 43.8 43.4 41.7 45.48.00 46.7 48.7 45.3 48.2 41.1 46.99.00 48.1 49.4 43.6 51.7 41.2 49.310.00 49.0 50.4 44.6 52.9 41.8 50.011.00 49.1 50.5 44.4 50.5 45.1 49.812.00 48.4 50.6 45.6 44.7 46.1 50.813.00 49.3 51.5 45.1 45.3 42.5 51.414.00 50.4 52.6 47.2 46.0 43.3 52.515.00 51.3 53.5 45.6 46.0 44.7 53.616.00 52.3 54.5 44.3 47.4 48.5 52.717.00 51.3 53.5 44.0 47.3 43.5 51.518.00 50.2 52.4 43.5 47.0 40.5 50.319.00 49.3 51.5 42.7 44.7 40.4 48.520.00 47.9 50.1 41.5 42.8 40.0 47.421.00 46.5 48.2 41.0 42.3 39.6 45.322.00 45.5 47.2 40.3 41.9 39.5 47.923.00 44.6 46.3 39.7 40.0 39.1 44.424.00 43.7 45.4 39.0 40.2 39.3 42.31.00 42.6 44.3 39.8 40.4 39.2 41.52.00 41.6 43.3 40.0 43.5 39.4 40.53.00 41.3 43.0 40.1 40.4 39.3 41.04.00 40.6 42.3 40.4 40.7 39.8 39.85.00 39.3 41.0 40.5 40.8 39.9 38.424 hrs. Average 46.5 48.4 42.8 44.7 41.5 46.9Day (Max.) 52.3 54.5 47.2 52.9 48.5 53.6Day (Min.) 43.3 45.3 40.3 41.9 39.5 44.5Night (Max.) 45.5 47.2 45.0 45.0 40.9 47.9Night (Min.) 39.3 41.0 39.0 40.0 39.1 38.4Projects & Development India Limited, Sindri Page 75 of 80