The article is devoted to solving the problems of choosing a variant of the calendar plan in the complex development of residential microdistricts. At present, a methodology for linking construction and installation works in time and space is being developed, new methods for calculating the organization of work are emerging. Due to the constant change in regulatory requirements in construction, the essential characteristics of scheduling methods change. Variant analysis may include a sufficiently large number of indicators of the quality of the organization of complex development. Therefore, a method for comparing options and choosing the best one is proposed, which takes into account an unlimited number of indicators of the quality of work organization.  At the same time, different indicators can be taken into account for different regions, as well as new ones can be added. The effectiveness of the methodology is analyzed on the example of a residential area.

Keywords: residential area, variant analysis, flow organization of work, quality indicators, regulatory requirements

It is an undeniable fact that the environment and its biodiversity are severely disturbed and damaged by the unrestrained and uncontrolled use and disposal of non-biodegradable plastic waste. Growing concern about this problem is stimulating interest in studying the biodegradation of polymers such as polyethylene and polystyrene, etc., which are very stable in nature and cannot easily biodegrade. The decomposition of these relatively inert materials occurs in the environment depending on the presence of several environmental factors such as solar or ultraviolet radiation, heat, oxygen, water salinity, hydrogen index and microorganisms that can use these polymers as food. Humans can create conditions for artificial abiotic and/or biotic degradation of plastic waste. The article describes the directions of plastic degradation, the factors affecting biodegradation, and the chemical and physical properties of plastics. The authors reviewed several ways to biodegrade plastics in the environment and investigated methods to improve it.

Keywords: environment, plastic, biotic degradation, abiotic degradation, plastic packaging, plastic waste

The issues of developing a project for strengthening the building structures of a cable overpass after an emergency (accident) are discussed. On a real example, a description of the accident is given, the performance of work on the ghost of structures to the standard state is illustrated. The article was written on the basis of the completed research work No. 18-26.

Keywords: building structures, safety, cable trestle, emergency response, technical expertise, buildings and structures, metal structures, reinforcement project

Nitrogen oxides are one of the most common and toxic gaseous air pollutants of large industrial centers. The main difficulty of cleaning gas emissions is related to the dependence of the efficiency of the applied cleaning technologies on the NOx concentration, the frequency of emissions, the need for processing and/or disposal of products of interaction of nitrogen oxides with absorbers and regeneration of catalysts. The article analyzes the features of currently used and promising methods of cleaning waste gases from NOx, systematizes data on the effectiveness of such technologies. Based on the analysis of the processes of formation of nitrogen oxides, rational approaches to reducing NOx emissions in metal etching technology and electroplating are proposed.

Keywords: nitrogen oxides, biogenic and technogenic sources, catalytic and non-catalytic purification, selective purification, absorption purification, comparative efficiency

Acidic impurities in the atmospheric air pose a certain threat to human health and contribute to the development of various diseases among the population, which is an urgent topic of research. The acidity of aerosols in the residential area of the village was studied . Vitriol (Sovetsky district, Volgograd), located in the zone of operation of industrial enterprises (tannery, production of building materials, etc.) for the spring-summer period of 2022. The selection of aerosol particles was carried out using passive monitors - leaves of apricot trees (Prunus armeniaca L.) in the green infrastructure of the residential area of the village. Vitriolic. The study of the acidity index indicated the absence of acidic impurities in the atmospheric air of the residential zone, which corresponds to the normative values (pH = 5.5-6.5), (according to Svistov P.F., 2010).

Keywords: aerosols, environmental monitoring, residential areas, acidic impurities, pH

A methodology has been developed that can be used to develop calculation and instrumental methods for determining the standards for the accumulation of solid municipal waste for retail chains under common management, having a single trade and technological process, a similar range of goods for sale and carrying out separate accumulation of secondary material resources.

Keywords: accumulation of waste, municipal solid waste, generation standard, object of a stationary trading network, cluster analysis

The article presents the study results of a soil-like fraction contamination at a landfill located on the territory of the Traktorozavodsky district of Volgograd with heavy metals. The soil-like fraction's pollution level was assessed using a cumulative chemical pollution index (Zc) and its modifications. It was determined that the contamination levels with heavy metals are dependent on a used cumulative chemical pollution index modification. The use of the average geometric values of a cumulative chemical pollution index (Zc) is preferred for a pollution assessment of a soil-like fraction. Because the pollution level of a studied soil-like fraction was assessed as hazardous, its use as a recultivation material can only be permitted after a detoxification.The main pollutants in the soil-like fraction are cadmium, copper, and nickel.

Keywords: landfills, soil-like fraction, heavy metals, pollution level

Environmental monitoring of physical pollution of territories is carried out in various regions of the Russian Federation and abroad. Thus, the influence of, for example, radio frequency radiation on human health and ecosystems has been established. In this regard, the study of low-frequency fields of electric fields at the stage of pre-design work is relevant. The purpose of the study was to study the electric field strength (E,V/m) on the land allocated for horticulture in the DNT ""Luch"" of the Sredneakhtubinsky district of the Volgograd region in September 2021. Research objectives: measurement of the electric field strength; analysis of the obtained results; study of anthropogenic and natural sources of physical pollution of the territory; discussion of the obtained results. Materials and methods. The study of the electric field strength on a land plot allocated for gardening was carried out using a PZ-34 electromagnetic field parameter meter (Russia), which is registered in the state register of measurement systems (No. 64925-16) and is popular among other researchers. Research results. 30 measurements were taken. The data obtained (E=1.16+0.11 (V/m)) did not exceed the standards for residential areas. The median values of the electric field strength were 10-17 times higher than the median values of the studied indicator in comparison with similar rural areas in other countries of the world. Conclusion. These facts may indicate low-frequency pollution of the territory of a mixed type: an anthropogenic factor (highways, high-voltage power lines), a natural factor: a possible hidden mineral deposit, as a product of the post-volcanic activity of an ancient underground volcano in the Volga steppe zone, which requires further large-scale geological exploration of the study area and possible change in the status of the land.

Keywords: monitoring, electric field strength, horticultural associations, residential areas

In this paper, an experimental assessment of dust emissions from warehouses of building materials from the point of view of their impact on the air environment is carried out. The technological operation of placement, in which dust is formed in a closed warehouse, is considered. It was revealed that in the process of placing building materials, the source of dust emission is aeration lights and windows. The dispersed composition of emissions entering the environment from unorganized sources (windows, aeration lamps) was experimentally determined by the height of the room.

Keywords: closed warehouse, dispersed composition, dust emissions, aeration lamp, building materials

The article presents the geological environment for each of the three territorial zones of the CBD, as well as exogenous processes and phenomena occurring in these zones; discusses the fundamental issues of lithomonitoring, which is an information system that determines the strategy of nature management; identifies the tasks that determine the achievement of the goal of monitoring the lithosphere.

Keywords: monitoring, landslide, mudslide, karst, geological environment, technogenic state, conglomerates, loess loam, modeling, information system

Noise pollution of the air is considered to be an excess of the natural level of the background noise or a sharp fluctuation and change in such sound characteristics as the frequency of the sound wave and the strength of the sound stream. The article considers noise levels in the mainline territories in a linear city.

Keywords: linear city, traffic noise, highways, air environment, landscaping, equivalent noise level, row of planting, arboretum composition

This article describes methods for measuring the characteristics of drinking water using microwave technologies, provides their comparative characteristics, advantages and disadvantages. The advantages of research by resonance methods are shown, the prospects for their application for further research are shown. Dielectric constant of substances, its influence on resonance.

Keywords: microwave technologies, resonant and non-resonant methods, water purification, drinking tests, dielectric constant

The paper analyzes the features of the spread of flare emissions from precisely identified sources of atmospheric emissions in the Irkutsk region using the trajectories of air mass transfer according to calculations using the HYSPLIT model and the "Fire Map" service from SCANEX. Estimates of the movement of flare emissions were made, the dominant directions of air mass transfer and their distribution in the regions of the Irkutsk region were noted. The impact of the natural and geographical features of the region on the spread of flare emissions was also assessed.

Keywords: HYSPLIT, flare emissions, PM2.5, PM10, atmospheric air pollution, black carbon, settled dust, Irkutsk region

The article analyzes the influence of an air cushion vehicle as a source of dust on the general and local picture of the dust situation in an industrial premises and assesses the significance of the increase in the concentration of dust particles in the dust and gas environment. A model for measuring the dustiness of the working area of industrial premises using a special set of high-frequency bandpass filters and a PC is proposed. Determination of dust content in industrial premises is carried out by the received spectrum of the acoustic signal, which is a "frequency portrait" of the concentration of dust particles in the dust and gas environment.

Keywords: industrial premises, transport vehicle, concentration of dust particles, measuring complex, ultrasonic signal, dustiness spectrogram

The reliability of assessing the amount of accumulated waste in the context of an imperfect scientific and methodological base for standardizing MSW, in the absence of generally accepted calculation methods, is not high enough. The possibility of using cluster analysis in the formation of a statistical sample of objects of a stationary trade network in setting standards for the accumulation of municipal solid waste is shown. A methodology for the formation of a representative statistical sample of objects of a stationary trading network has been developed when setting standards for the accumulation of solid municipal waste based on cluster analysis.

Keywords: waste accumulation, municipal solid waste, MSW generation standard, stationary trade network object, cluster analysis, representative sample

The problem of developing an optimal waste management system is very relevant in many countries. To solve it, it is necessary to study the processes of waste accumulation, to systematize the factors and conditions that affect the generation of waste, to determine the features of establishing waste accumulation standards for various objects. The article discusses the features of the accumulation of municipal solid waste and the establishment of standards for their accumulation for stationary objects of the distribution network.The volume and mass values ​​of daily indicators of accumulation of MSW from a trading area of ​​a certain type and the total value of accumulation indicators (over the entire trading area) are found. The formats of retail facilities with the maximum average daily indicators of MSW accumulation have been established. Standards for the accumulation of MSW for the category under consideration have been established for 1m2 of retail space with food products, 1m2 of retail space with non-food products.

Keywords: waste accumulation, municipal solid waste, MSW generation standard, stationary trade network object, volume indicator, mass indicators

An overview of methods for assessing the state of the environment is presented. The study of methods for assessing the state of the environment and the impact of production facilities is the most important factor contributing to reducing the negative impact on the environment. An example of a comprehensive assessment of atmospheric air in the Motovilikhinsky district of Perm using the Jobs-Decon software package is considered.

Keywords: ecology, environment, subject-oriented management, production facilities, assessment, Jobs-Decon, environmental pollution

The wastewater generated by the pulp and paper industry contains diverse contaminants such as organic substances, fine suspended powders, and dissolved solids. Currently, integrated treatment technologies are employed, utilizing thin-layer settling tank modules to eliminate solid contaminants. This study presents the outcomes of a comparative analysis of the efficacy of a conventional thin-layer module with flat plates and a modified thin-layer module consisting of two levels of plates, positioned in opposing directions, facilitating the rotation of water flow within the module. Through computer simulation techniques, it is demonstrated that the modified module design can enhance the cleaning efficiency by 8-30% for wastewater flow velocities ranging from 0.0025 to 0.0125 m/s. Additionally, particle trajectories and velocity fields were obtained, which clearly illustrate the direction of the dictating flow and circulation zones within the structure.

Keywords: Wastewater, pulp and paper industry, thin-layer module, module with rotation of water flow, computer simulation of particle deposition.

The stability of three-phase foams stabilized by particles and surfactants (surfactants) of various nature has been studied. The varying degree of hydrophobization of particles by short-chain surfactant hexylamine may be accompanied by a change in the properties of the dispersed system from high-strength and low-stability foams to structured low multiplicity. A decrease in the stability of foams stabilized by hydrophobized titanium oxide particles at a concentration of long-chain surfactant - cetylammonium bromide Cпав≥Сккм may be due to a decrease in the edge angle of wetting of solid particles.

Keywords: foams, solid particles, surfactants, stability

Experimental studies of the effect of the intensity of mixing of mineral coagulants with water on the efficiency of water treatment in different periods of the year have been carried out. The studies were conducted in June-August - low-turbidity water with relatively low color and high temperature; November-December - low-turbidity and low-color water with low temperature; flood in April-May - increased turbidity and color of water with low temperature and alkalinity. The results obtained allow us to evaluate the effectiveness of the use of concentrated coagulation, high-gradient mixing in water purification with mineral coagulants. The possibility of separate and joint use of mineral coagulants in different periods of the year was assessed.

Keywords: natural water, coagulant, concentrated coagulation, high gradient mixing, mixed coagulant, velocity gradient

In the article, the object of the study is the spread of pollutants from the sources of their release. During the calculations, the sources of atmospheric pollution were combined with the allocation of groups taking into account the height of the mouth of the emission source. To reduce time-consuming calculations using the method of combining sources of atmospheric pollution, the program has been created that provides fast processing of a large amount of information. A data bank on the main sources of pollution of the Rostov region has been compiled; systematization and reduction of these sources to a single coordinate system has been carried out. A trial estimation calculation of the regional transport of pollutants from the combined sources of emissions with the construction of maps of pollution isolines was made.

Keywords: harmful emissions, sources of pollution, the method of unification, data bank, maps of pollution isolines

The guarantee of ensuring the safety of people and material assets in the event of a fire requires a careful approach to the design and installation of smoke ventilation. In order to evacuate people from the smoke zone in a timely manner, technical devices with a normalized limit of resistance to fire are installed – smoke valves. To determine the distribution of the pressure of the air flow in the smoke control valve over its cross-sectional area, the method of mathematical modeling is used. With the help of a mathematical model, visual modeling of the distribution of the gas-air mixture flow is carried out, a detailed analysis of hazardous factors is carried out, an assessment of the possible temperature and time of flame propagation, determination of the probable degree of smoke in the interior space and the ways of smoke movement.

Keywords: smoke, fire, ventilation system, smoke protection, smoke valve, mathematical model

The article considers the problem of continuous monitoring of the concentration of dust flow in air ducts at enterprises in the production of building materials. A spectral-timbre methodology for estimating dust concentration based on the analysis of acoustic emission signals is proposed. Two stages of adaptation of the simplified assessment of dust concentration on the bench model and in production conditions were carried out. In the process of adaptation, a piezoceramic sensor is used, an acoustic signal from which using a preamplifier is fed to a recording device called potentiometer with a circular daily diagram . The reference weight method was used to measure the actual dust concentration and simultaneously record the readings of an adapting dust meter.

Keywords: building materials, dust concentration, dust measuring equipment, acoustic methodology, acoustic emission signals, Fourier spectrum

The article considers the possibilities of using a large fraction of coal industry enrichment waste in road construction. The use of waste rock as a large aggregate in the composition of road concrete is proposed, because the enrichment waste is not disposed of properly, but is sent to the tailings dump. These dumps occupy large areas of land, thereby causing damage to the environment. The fractional composition of coal waste from the enrichment of the Gukovo-Zverevsky coal-bearing area is analyzed. From the results of sieving, it was seen that the structural composition satisfies the size of the fractions of a large aggregate for the concrete mixture. Analytical studies of the composition of the concrete coating were carried out. Based on the analysis of the composition of the concrete mixture, we came to the conclusion that tailings waste can be used as a major substitute. A comparative characteristic of the requirements put forward for the resulting mixture is presented. In our work, one of the main qualities of the road concrete pavement was tested - strength. The results of experimental strength tests of control samples of concrete with various types of aggregate are presented. Based on the results obtained, it is possible to draw a positive conclusion about the possibility of using enrichment waste as a large aggregate of concrete mixture in road construction according to technical and economic criteria.

Keywords: road construction, concrete mix, enrichment waste, coal rock

The Sustainable Development Goals are becoming increasingly important indicators of the success of investment and construction projects. This is the result of the implementation of various planning and regulatory standards, especially in relation to sustainable development issues, which are currently used to control and monitor the construction process. Moreover, due to the need, construction participants also require its adoption as the main goal of investment and construction projects. In this regard, this article explains value management as a tool to ensure the sustainability of construction in the development and implementation of urban development projects. Various factors that need to be considered before starting a sustainable value management study are discussed.

Keywords: sustainable construction, sustainable development, sustainable cost management, environmental safety, urban development, construction management