Krasnodar GRES Project Volume I11 Environmental Assessment

@ Part of the nitrogen can be absorbed by root and free bacteria and thus, take
biological form. Potential absorption capacity of bacteria under optimum and non-
optimum conditions is 70 to 300 and 5 to 15 kg/hectare, respectively. Upon
bacteria death nitrogen is utilized by vegetation.
* oxygen
The soil studies proved monthly, annual, and 5-year period dosage of nitrogen
passed to the three most common types of soil in the region to have no significant
impact on hydrolithical pH, salt content, or soil biological effectiveness (for more
detailed information see EIA of Krasnodar Power Plant, 1992).
Nitrogen entrained in Krasnodar power plant emissions shall not have significant
negative impact on soil properties due to low concentration. Annual amount of
emissions is 400 to 500 less than the recommended nitrogen fertilizer dosage in
the region. Favorable drainage conditions and soil properties in the region prevent
accumulation of toxic quantities of nitrogen in the soil and its acidulation.
The power plant emissions shall have a negligible impact on biota through the
atmosphere, water and fodder. The power plant impact on atmosphere shall
consist of decrease of oxygen content, which will be used for fuel combustion,
and of emissions of nitrogen dioxide - 86 g/sec. Previously conducted calculations
proved ("EIA", 1992, section "Vegetation") annual consumption of 21 XI O7 m3 of
for fuel combustion. in addition, use of agricultural lands for technogenic
purposes shall decrease oxygen supply to atmosphere. Certain decrease of oxygen
contents in atmosphere shall not have negative impacts, because it will be
compensated by tremendous reserves of oxygen in atmosphere. Constant oxygen
contents in atmosphere is determined by vegetation and phytoplankton absorbing
carbon dioxide and evolving oxygen during photosynthesis.
Fodder and forage crops in the natural meadows and pasture lands shall not
accumulate nitrogen oxides, emitted by the power plant, of toxic effect for the
stock. These oxides shall be 0.3 to 0.4 % only of the recommended dosage of
nitric fertilizers (60-90 kg/hectare).
Contents of nitrates in the Laba river shall not change with power plant emissions.
The increase will be slight - 0.0003 mg/L (with MPC adjusted to nitrogen of 10
mg/L) .
Operation of the power plant shall not have a significant negative impact on
agricultural production in the Mostovskoy district.
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