1. Dangerous enterprises and their affect on the Lake Baikal environmental area Sirina Nataliya Irkutsk State University

2. Objectives: consider environmental situation in Shelekhov; calculate pollutants dispersion near Shelekhov; assess possible contribution of emission from Shelekhov enterprises to Lake Baikal surface pollution.

3. Equation of transfer and turbulent diffusion of admixture:

4. O l h a Populated area Smolenshina Aluminium plant area 01км Dacha’s area Shelekov city 1 2 Irkut river Figure 1 – Frequency exceeding of benz(a)pyrene 5 maximum allowable concentrations (standards for air), January

5. I r k u t O l h a I r k u t r i v e r Populated area 01km Dacha’s area Shelekhov city 1 Aluminium plant area Smolenshina Figure 2 – Frequency exceeding of solid fluoride maximum allowable concentrations (standards for air), January

6. Figure 3 – Isolines of matter concentrations near surface when north-west wind blows

7. Figure 4 – Isolines of matter concentrations 100 meters height when north-west wind blows

8. Table Different substances near surface concentrations of Shelekhov enterprises SubstanceDanger class Concentrations limit (mg/м 3 )Concentration for isopleth's number 1 (mg/m 3 ) Maximum (20 min average) Daily average Nitrogen oxide (IV)20,20,045·10 -5 Sulphur oxide (IV)30,50,052·10 -4 Carbon oxide45,03,05·10 -4 Benz(a)piren1-1065·10 -8 Fluoric hydrogen20,020,0051,5·10 -5 Acetone40,35 10 -8 Suspended matters30,50,156·10 -4 Carbon-black30,150,055·10 -7

9. Conclusions: we pointed out that Shelekhov is one of the most air polluted towns in Russia; we presented environmental assessment results of pollutants dispersion near Shelekhov; we evaluated possible contribution in pollution of Baikal surface from Shelekhov industrial enterprises and showed that polluting matters reach the south Baikal areas in amounts rather lower then limited