National Environmental (Ambient Air Quality) Regulations, 1994

25th October, 1994 Colombo 11- 193/ 1 , 2A - D 034203 (94/ 10) SRIMANI ATHULATHMUDALI Minis ter Of Trans port,Highways, Environment And Women's Affairs THE NATIONAL ENVIRONMENTAL ACT. No 47 of 1980 REGULATIONS made by the Minister of Transport, Highways, Environment a nd Women 's Affairs under Section 32 of the National Environment Act. No 4 7 of 1980 Colombo 5th October, 1994 SIRIMANI ATHULATHMUDALI, Minister Of Transport,Highways, Environment and Women's Affairs Regulations 1. These regulations m ay be cited National Environmental (Ambient Air Quality) Regulution3, 1001 . 2. The permissible ambient a ir quality standards shall be as specified in the Schedule hereto in relation to the classes of air pollutants specified therein. 3. The requisite tests for determining whether the specified air quality standards are maintained, shall be carried out by utilizing the methods specified in the schedule here by the use of equipment approved for this purpose by the Central Environmental Authority. 4 . In these regulations "Central Environmental Authority" shall h ave the same meaning assigned to it in the National Environmental Act, No 47 of 1980. Pollutant Carbon Monoxide Nitrogen Dioxide Sulfur Dioxide Averaging Ttme ,. 8 hr. 1 hr. Any time 24 hr. 8 hr. 1 hr. 24 hr. SCHEDULE 1 Maximum Permissible Level Method of Measurement In Inppm mg/ m3 10 9.0 Non-dispersive infrared 8pP.ctrnsr.opy 30 26.0 58 50.0 0.10 0.05 Colouring using Saltzman method 0.15 0.08 or equivalent (gas phase chemiluminescence) 0.25 0.13 0.08 0.03 Pararoaaniline method of equivalent (pulsed fluorescent method) 8 hr. 0.12 0.05 1 hr. 0.20 0.08 Ozone 1 hr. 0 .20 0.10 Chemiluminescence method or equivalent (ultra violet photometric method Lead Annual 0.0005 Hi-volume sampling, wet ashing/ atomic absorption or spectroscopy 24 hr 0.002 Suspended Annual 0.10 Hi-volume sampling & Gravimetric Particulate 24 hr. 0.30 Matter 8 hr. 0.35 (8PM) 3 hr. 0.45 1 hr. 0.50 *(Mimmum number of observations required to determme the average over the specified period: 03 h our average 03 con oecutive hourly average. 08 hour average - 06 hourly average. 24 hour average - 18 hourly average yearly average - 09 monthly averages with at least 02 monthly average each quarter. By wet chemistry methods or by automated analysers.