[Risk assessment from exposure to chemical contaminants in food].

There was investigated the impact of chemical substances contained in the public health foodstuffs in eight regions of the Republic of Tatarstan on 11 product groups: meat and meat products, fish and fish products, milk and dairy products, bread and bakery products, sugar and confectionery products, vegetables and melons (excluding potatoes), potatoes, fruits and berries, vegetable oil, eggs and egg products, salt. In total there were analyzed more than 240 thousand samples offood raw materials andfood products over the period offrom 2006 to 2014. The study took place on 27 priority chemicals, including thirteen carcinogens (benzo (a) pyrene, DDT, hexachlorobenzene, hexachloran, heptachlor, alpha-lindane, beta-lindane, lindane, cadmium, arsenic, lead, derivatives of 2,4-D acid, cypermethrin). Exposition load is calculated by the 50 (median), and 90 percentiles of the content ofpollutants in food products. There were calculated carcinogenic risks, HQ coefficients and HI indices for chronic non-cancer exposure. High values of the total cancer risk (3.31*10 at the median level of 1.49*10+ at the 90 percentile) are associated with the exposure to tohexachlorane and alpha-lindane seem to be alarming (from 1.73*10 to 9.68*10) with the effect of lindane, cadmium and lead with dominant contribution to the total risk in the use of meat and meat products, milk and dairy products. The warning value of Hazard ratios (HQ 1.1-3) at 90-percentile were shown on nitrate, lead, beta-lindane, high (HQ >3), for DDT and its metabolites, lindane and arsenic, with the dominant contribution to the exposure of vegetables and melons (excluding potatoes), potato, milk and milk products.

[HYGIENIC ASSESSMENT OF WORKING CONDITIONS IN MODERN PETROCHEMICAL INDUSTRY].

In the paper there are reported the results of the performance of hygiene assessment of working conditions in petrochemical industry. The studies have shown that workers' body is exposed to a complex of hazardous occupational factors including a chemical factor, noise, the severity and intensity of the working process. An overall assessment of working conditions corresponds to Class 3.3.

[HEALTH RISK ASSESSMENT OF THE CHILD POPULATION IN THE CONSUMPTION OF TAP WATER WITH ACCOUNT OF ITS SECONDARY POLLUTION].

Work was performed within the framework of the State program of competitive recovery of Kazan (Volga) Federal University among the world's leading research and education centers and subsidies allocated to Kazan Federal University for the implementation of Public task in the field of scientific activities. In the paper there are presented results of the risk assessment for children's health, with allowances made for evolving cationic-anionic pattern of tap waters while moving along pipelines and distributing networks, discriminatingly on study area. The population health risk assessment was performed according to public health regulatory methods P 2.1.10.1920-04 in relation to the ionic composition of tap water consumed by children's population of the city of Kazan. The use of a risk assessment in consumption of tap water by the most susceptible population group with localized residence allows to identify zones in the boundaries of the urban area in which water is needed post-treatment of tap waters flowing to consumers.

[Monitoring and assessment contamination of toxic elements food in Tatarstan monitoring and evaluation of contamination by toxic elements of food products in the territory of the Republic of Tatarstan].

Actual consumption of toxic elements in the body of an adult human in the Republic of Tatarstan (during the period of the study of the production in 2008-2012) amounts for lead: 0.68 mg/week for cadmium: 0.18 mg/day, arsenic: 0.68 mg/day, mercury: 0.21 mg/week (per 1 kg body weight) or respectively: 22.81%, 18.0%, 13.69%, 4.27% of the allowable levels of the chemical load. We have performed calculations with account of the balance of food resources per capita per year in the Republic of Tatarstan. This analysis showed that the main dietary sources of income for cadmium there are milk and dairy products (48.32%), bakery products (16.07%), meat and meat products (13.22%); for lead there are bakely products (26.85%), potatoes (24.36%), milk and dairy products (23.94%), meat and meat products (7.55%); for mercury there are milk and dairy products (53.72%), meat and meat products (16.82%), potatoes (10.92%); fish and fish products (4.74%); for arsenic there are milk and dairy products (72.51%), meat and meat products (12.8%), bakery products (3.05% ,); fish and fish products (2.23%). It is important to know not only what products are the most contaminated, but what place in the structure of the nutrition they take.

[hygienic assessment of the effectiveness of the implementation of the concept for the improvement the water supply of population in the south-east region of the Republic of Tatarstan].

In the paper there is presented the hygienic evaluation of the implementation of the program aimed at the improvement of the water supply of the population in the oil-producing regions of the Republic of Tatarstan. As a result of the implementation of measures it managed to improve the quality of drinking water in terms of chemical harmlessness and to reduce the risk to public health. Currently following factors as quality of the water from water sources, the mismatch of sanitary protection zone to requirements of sanitary legislation and the failure of regime measures in its territory, water quality deterioration during transportation and the inadequacies in the laboratory control were shown to make the highest contribution to the disadvantage of centralized drinking water systems.