Surgil ESIA Report - Volume III - EKN

“O’ZLITINEFTGAZ” PC
PFS “Surgil field complex costruction with valuable
components retrieval”
Anthropogenic noises are one of kind of the anthropogenic impact on environment.
Harmful effect of noise is defined by some factors:
- intensity (in dB);
- frequency (most dangerous - high-frequency);
- duration;
- noise character (impulsive noise is especially dangerous).
Pipes through which gas is transported, torches of technological installations and etc.,
can be the noise source on designed constructions. Noise from the given production
processes, as a rule, is rather low.
The most essential source of noise is separating devices at the moment of their
purges. In this case noise results from considerable gas pressure losses, as a result of the
high speed of the blowing-off products discharge. Gas bleeding-off from the equipment
occurred before the execution of repair-preventive works once a year within 20-30 minutes.
Purging of separators is spent seasonally: 1-2 times a day during the summer period and 3-4
times a day during the autumn-winter period. Purging time rather small and makes 1-2
minutes.
Noises during gas bleeding-off have short-term incidental character. During gas
bleeding-off from the equipment and also during carrying out of purging of separating
devices the maintenance stuff should use personal protection equipment (ear-phones, humeliminating
plugs, etc.).
In the territory of designed constructions the permissible noise levels on
workplaces, in working zones, in industrial premises and in the territory of the
enterprises, constant workplaces of stationary machines will make no more than 80dB,
which shows equipment operating experience at the similar enterprises.
One of the main characteristics of prospective industrial activity is the impact
characteristic on environment.
The technology of objects is characterized by work continuous process, connected
with low emissions in atmosphere of chemical substances. Nitrogen and sulfur dioxide,
carbon oxide, hydrocarbons and carbon black are the main from them.
Proceeding from design values of atmospheric pollution levels, shown on dispersion
maps (figures 13-19) by considered components, it is visible, that character of impact during
normal constant operating mode has moderate character. Peak values of ground
concentration outside of designed objects make: nitrogen dioxide - 0.51 MPC, and per other
polluting impurities (nitrogen oxide, carbon oxide, sulfur dioxide, carbon black, acrolein,
hydrocarbons) concentrations will not exceed 0.1 MPC level.
Enterprise impact can be raised in case of the emergency emissions which origin will
have short-term character.
Besides, direct impact on atmospheric air will occur during construction. Emissions
in atmospheric air during this period are formed as a result of special equipment and motor
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