This work aims to conduct and identify level of ambient and indoor air quality pollutants targeted to the 3rd industrial area of Dammam, KSA. This study and analysis help us to understand human working atmosphere in the industrial area. We have targeted critical and non-critical parameters to provide safe and conducive work atmosphere. Various environmental regulatory agencies ensure compliance of standard. Air pollution is an important public health problem in developed and developing nations (Issever et al., 2005). Worldwide, there are more than 2.7 million deaths due to air pollution (Nguyen & Kim, 2006a, 2006b). Sources of air pollution include road traffic emissions, industrial emissions and domestic heating, or secondary formation pollutants (Marc-Andre et al., 2007; Kassomenos et al., 2006; Ogrin, 2007, Potoglou & Kanaroglou, 2005) and (Charles et al., 2005). Common air pollutants that draw intense concerns include particulate matter (PM), ozone (O3), carbon monoxide (CO), sulfur dioxide (SO2), nitrogen dioxide (NO2), and volatile organic compounds (VOCs) (Muir et al., 2006).
PM is a mixture of constituents that are formed by a large range of mechanisms associated with both natural and anthropogenic origins (Guerra et al., 1995). Exposure to high concentrations of PM increases the risk of lung cancer, respiratory diseases, arteriosclerosis, as well as changes in heart rate variability (Alves et al., 2000). In addition, aerosol particles have an impact on the environment in areas such as visibility and staining of buildings (de Kok et al., 2006; Sun et al., 2004; Virtanen et al., 2006).
CO is a flammable and poisonous gas emitted from incomplete combustion of carbonaceous material. Once absorbed, CO diffuses to plasma, passes across the red blood cell membrane, and finally enters the red blood cell cytoplasm where it binds to hemoglobin (Hb) forming carboxyhemoglobin (COHb). The affinity of Hb for CO is 210 - 300 times greater than for oxygen, and Hb is thus incapable of combining with oxygen (Fang et al., 2006; Menut, 2003).
NO2 is released into the atmosphere from natural and man-made sources (e.g., burning of fossil fuels, construction, and mining). It is considered one of the main traffic-related air pollutants. A great number of studies have assessed the air pollution effects of nitrogen oxides (NOx) on human health. For instance, a cohort study reported significant increases in cardiopulmonary mortality for those living near major road areas in the Netherlands (Bono et al., 2007). NOx together with VOCs are responsible for the formation of photochemical smog and ground-level O3 in the presence of sunlight (Muir et al., 2006).
SO2 is emitted into the atmosphere mainly from anthropogenic sources such as the combustion of sulfur-containing fossil fuels (e.g., coal, oil, and natural gas). Peak levels of SO2 in the air can cause temporary breathing difficulty for people with asthma who are active outdoors. Longer-term exposures to high levels of SO2 and particles cause respiratory illness and aggravate existing heart disease. SO2 and NOx in the atmosphere are the major contributors to acidification. Acid rain damages forests and crops, changes the makeup of soil, and makes lakes and streams acidic and unsuitable for fish. VOCs are those organic compounds that have boiling points roughly in the range of 50˚C - 250˚C (Shaw et al., 2005). Outdoors VOC concentrations are affected by season and temperature, proximity to emission sources such as industry, traffic and gas stations (Jia et al., 2008; Kwon et al., 2006; Kingdom of Saudi Arabia, Royal Commission for Jubail and Yanbu, 2010). Indoors VOCs concentrations are affected by outdoor levels due to the exchange of indoor and outdoor air, and by the numerous sources present indoors (Sapkota et al., 2006; Batterman et al., 2007; Charles et al., 2007; Tipton & Dzombak, 2005).
The VOCs enter the atmosphere at room temperature and may cause headaches, dizziness, nausea and irritation of mucous membranes (Teixeira et al., 2009; Nathanson, 1995; U.S. Environmental Protection Agency, 2001; Sivertsen, 1997).
The air pollution problem inside or over the industrial area has different sources, including the plant operation and related activities. The general objective of this study is the assessment of air quality level inside the industrial area. This study will be considered as a benchmark of the environmental database for all industrial areas in the eastern province of the Kingdom of Saudi Arabia.
2. Data and Research Methods
2.1. Research Area Overview and Data
3rd Industrial City is located at 150 kilometers from city of Dammam which is a coastal city located in the Eastern Province of the Kingdom of Saudi Arabia (Figure 1). The geographic position system (GPS) coordinate of each corner of project site NW: 25˚55'8.25"N, 49˚57'32.26"E; NE: 25˚55'8.66"N, 49˚57'35.63"E; SE: 25˚55'3.22"N, 49˚57'35.45"E; and SW: 25˚55'3.17"N, 49˚57'32.21"E. During the present study, levels of the ambient air pollution were studied at two different locations. Location were the main gate and inside the premises. Ambient outdoor and indoor air quality pollutants include temperature, relative humidity, nitrogen dioxide, sulphur dioxide, hydrogen sulphide, ammonia, carbon monoxide, nitrogen oxide, ozone, carbon dioxide and total volatile organic compounds, particulate matter PM 10 and PM 2.5) were monitored at the boundary and inside of the facility. All reported values are in compliance with national ambient quality standards at all locations.
2.2. Monitoring Methods
A valid certified calibrated portable YES Plus LGA air quality monitor and AEROCET 531, particle mass monito (Class 1 laser product complies with IEC 60825-1 Ed.1.1, EN60825-1 W/A11 and US 21 CFR 1040.10) were used to monitor ambient (outdoor) and indoor air quality. Air quality parameters monitored for ambient and indoor environment is shown in Table 1. Each location was monitored for fifteen (15) minutes. These monitoring were conducted at a height of 1.5 m above ground level. The height is approximately equal to the employee’s breathing zone so that the concentrations measured will accurately reflect the concentration that is inhaled.
Air quality monitoring was conducted on December 14, 2019. Air quality monitoring data recorded at the various location of plant and various area mentioned in Table 2 of the facility is shown in Table 3.
2.3. Temperature and Relative Humidity
The ambient average temperature and relative humidity vary from 24˚C - 27.1˚C and 18.4% - 26.2% during the day time. Figure 2 and Figure 3 graphically illustrates the temperature and relative humidity data in respectively. The temperature and humidity potential to increase in the summer season due to desert natural environment.
Figure 1. Facility location in industrial city (local context).
Figure 2. Ambient temperature data.
Figure 3. Ambient relative humidity data.
Table 1. Ambient and indoor air quality parameters.
Table 2. Ambient and indoor monitoring locations.
Table 3. Ambient air quality monitoring data.
2.4. Ambient Air Pollutant
Reported data of sulphur dioxide (SO2), carbon monoxide (CO), ozone (O3), and hydrogen sulfide (H2S) and particulate matter (PM 10 and PM 2.5) are shown in Figures 4-9 respectively. All values are in compliance with national ambient quality standards at all locations. Figures 7-9 depict PM 2.5, 10 and hydrogen sulphide.
3. Indoor Air Quality Environment
Air quality parameters include temperature, relative humidity, nitrogen dioxide, sulphur dioxide, hydrogen sulphide, ammonia, carbon monoxide, nitrogen oxide, ozone, carbon dioxide and total volatile organic compounds, particulate matter PM 10, particulate matter PM 2.5 and total suspended particulate (TSP). Indoor air quality recorded at the facility is shown in Table 4.
Figure 4. Ambient sulfur dioxide data.
Figure 5. Ambient carbon monoxide data.
Figure 6. Ambient ozone data.
Figure 7. Ambient hydrogen sulphide data.
Figure 8. Ambient PM 10 data.
Figure 9. Ambient PM 2.5 data.
Table 4. Indoor air quality monitoring data.
3.1. Temperature and Relative Humidity
Temperature and relative humidity are often referred to as comfort parameters and contribute to the thermal comfort for indoor working personnel. There are no “ideal” humidity and temperature standards suitable for all building occupants or indoor work areas therefore different organizations have varying standards. The average temperature and relative humidity data monitored at each location is compared with NIOSH standards.
Figure 10 and Figure 11 graphically illustrates the temperature and relative humidity data with NIOSH lower and upper limit standard. Temperature and relative humidity were in compliance with NIOSH standards. The monitoring was undertaken in the winter season but there is potential to increase temperature and humidity in the summer season.
3.2. Indoor Air Pollutants
Reported data of carbon monoxide (CO), sulphur dioxide (SO2), hydrogen sulfide (H2S), nitric oxide (NO), ozone (O3), total volatile organic compounds (TVOCs) and carbon dioxide (CO2), particulate matter (PM 10), particulate matter (PM 2.5) and total suspended particulates with standards are shown in Figures 12-21 respectively. Figure 19 and Figure 20 represent the PM 2.5 and PM 10 data was reported above IDPH (65 µg/m3 and 150 µg/m3) standards.
Figure 10. Indoor temperature data.
Figure 11. Indoor relative humidity.
Figure 12. Indoor carbon monoxide data.
Figure 13. Indoor sulfur dioxide data.
Figure 14. Indoor hydrogen sulfide data.
Figure 15. Indoor nitric oxide data.
Figure 16. Indoor ozone data.
Figure 17. Indoor VOC data.
Figure 18. Indoor carbon dioxide data.
Figure 19. Indoor PM 2.5 data.
Figure 20. Indoor PM 10 data.
Figure 21. Indoor total suspended particles data.
Table 5. Ambient air quality standards.
aViolations will only be reportable where validated data is available for 98% of measurements; bThe average 90th Percentile 24-hour concentration must not exceed 340 μg/Nm3; cThe average 90th Percentile 24-hour concentration must not exceed 35 μg/Nm3.
Table 6. Indoor air quality standards.
All values are in compliance with OSHA/NIOSH/ACGIH/IDPH/NHMRC standards where applicable except particulate matter PM 10 and PM 2.5 at production area.
3.3. Ambient Air Quality Standard
Ambient air quality standards (AAQS) of kingdom of Saudi Arabia are outlined in Table 5. There are different agencies globally that develops Indoor air quality standards. The indoor air quality standards from international agencies from the National Institute of Occupational Health and Safety (NIOSH), Occupational Safety and Health Administration (OSHA), American Conference of Governmental Industrial Hygienists (ACGIH), Illinois Department of Public Health (IDPH), Australian National Health and Medical Research Council (NHMRC) are represented in Table 6. These standards will be used to evaluate monitoring data where applicable.
The findings of the ambient air quality monitoring study show that the air quality parameters are within the acceptable limit of national ambient air quality standards. The findings of the indoor air quality monitoring study show that the air quality parameters are within the acceptable limit of working environment except for particulate matter, PM 10 and PM 2.5 at production area.
We recommend wearing appropriate personal protective equipment (PPE) and a nose mask must be mandatory at production areas.
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