Who has an industrial hygiene pre-assessment report for environmental protection construction projects?

5.3 Analysis of Occupational Disease Hazard Factors 5.3.1 Analysis of Hazards from Industrial Toxicants 1) By conducting engineering analyses of similar projects and investigations into occupational disease hazard factors in the workplace, as well as by carrying out engineering analyses for this specific construction project and identifying potential occupational disease hazard factors, it is predicted that this project will be exposed to various industrial toxicants, including sodium hydroxide, sodium carbonate, sulfuric acid, nitrogen oxides, benzene, toluene, xylene, and various isomers of nitrobenzene ； 2) According to the classification criteria in GB5044 – 85 \"Classification of Hazards from Occupational Exposure to Toxic Substances\" (see Table 5-5 for details), benzene is classified as a substance of Grade I (highly hazardous), while sulfuric acid and nitrogen oxides are classified as substances of Grade III (moderately hazardous). Toluene, dimethyltoluene, sodium hydroxide, sodium carbonate, nitrotoluene, and their isomers are classified as Grade IV (moderately hazardous). Following the principle that, when exposed to multiple toxic substances, the classification is determined by the most hazardous one among them, the hazardousness level of the toxic substances used in this production process is Grade I (extremely hazardous) ； 3) According to the Notice Issued by the Ministry of Health (No. Wei Fa Jian Fa 142), benzene and nitrogen oxides are both highly toxic substances; this facility involves high-risk toxic operations and therefore requires special management. 4) Based on the comparison results, the levels of toxins in the workplace were all below the occupational exposure limits specified in \"Occupational Exposure Limits for All Hazardous Factors in the Workplace – Part 1: Chemical Hazardous Factors\" (GBZ 2.1-2007), indicating that toxin concentrations can be effectively controlled under normal working conditions. 5) It should be noted that this project contains large amounts of toluene, nitrotoluene, nitric acid, etc.; in the event of an accident, there is a risk of acute poisoning caused by toxic substances such as benzene, nitrotoluene, and nitrogen oxides, so measures to prevent accidents must be strengthened. 5.3.2 Analysis of the Hazards of Productive Noise 1) Noise is another significant occupational hazard factor in this project. The equipment that generates high-intensity noise are mainly various types of pumps, such as mixers and air compressors; the noise produced is primarily of mechanical dynamic origin. 2) Based on the comparative noise detection results, effective sound insulation and absorption measures were implemented for the pumps, and due to the high degree of automation of the equipment, the noise levels at all noise-generating points were within acceptable limits. 3) After the new installation is completed, with the addition of noise sources such as pumps, the noise level at various key locations will increase according to the principle of noise superposition. The existing sound source has a level of 80 dB(A); if the new device also has a level of 80 dB(A), then the combined sound intensity should theoretically be 83 dB(A). 4) Theoretical predictions suggest that once the new device is in operation, it will generate noise levels below 83 dB(A); since the contact time of workers during inspections is short (less than 2 hours), this meets the health standard requirements. 5.3.3 Analysis of High-Temperature Hazards Related to Productivity 1) The areas where this equipment generates high-temperature thermal radiation mainly include nitration kettles, preheaters, etc. The heating furnace burns at high temperatures, and all reactions take place at around 60°C; therefore, conditions for the generation of significant high-temperature thermal radiation exist in the production unit area. 2) The heat sources associated with the production efficiency of this facility are mainly concentrated in the nitric acid production section; these heat sources are located outdoors, which facilitates heat dissipation. Workers only come into contact with them during inspections and equipment maintenance. Therefore, the focus of controlling the risks related to high-temperature occupational diseases is on inspection personnel in summer, as well as those who carry out emergency repairs and maintenance work in high-temperature environments. By adopting working methods such as rotational shifts and intermittent work to shorten the duration of each exposure to high temperatures, and by providing cool drinks at high temperatures, the harm caused by high temperatures and radiant heat to the human body can be reduced, thereby achieving the goal of protecting workers. 3) The highest temperature in summer at the location of this project reaches 39–40 °C; during outdoor inspections and maintenance work in summer, workers may be exposed to occupational health hazards caused by high temperatures and solar radiation. Since the duration of each time the staff enter the site to carry out operations is short (