You are a consulting engineer hired by company X on this project. Please prepare a brief assessment report to the USEPA. Quantify the risks and make a conclusion on whether site remediation is needed....

Hazardous Waste Management and Site Remediation
[About]
This research aims to provide the USEPA with a concise evaluation report on hazardous waste management and site remediation. Estimate the hazards and decide whether site cleanup is necessary. That is true of the alternatives available when dealing with hazardous waste cleaning and redevelopment concerns at sites that may be polluted. All applicable regulatory standards must be met by process wastes generated during the treatment of contaminated media. This guideline aims to achieve the greatest possible environmental outcome at the lowest possible cost while adhering to the hazardous waste regulations that apply to contaminated media. Unless otherwise stated, this research supersedes all previous recommendations on hazardous waste cleanup.
[Basic and History]
When Congress approved the Resource Conservation and Recovery Act in 1976, the federal hazardous waste program began (RCRA). The program was established under Subtitle C of that statute, which ordered the United States Environmental Protection Agency (USEPA) to produce rules defining hazardous wastes and suitable management requirements. The RCRA Subtitle C rules to contaminated media were not addressed when they were created in the late 1970s. Since the first decision to apply RCRA's Subtitle C standards to contaminated media, the US EPA has published several important rules, as well as several policy memoranda and guidance documents, clarifying the requirements. In general, these papers have allowed for a more flexible approach to ensuring that polluted sites are examined and remedied as soon as possible.
[Hazardous Waste Determinations]
Production locations, landfills, dumps, waste storage, treatment sites, mining tailings sites, spill sites, chemical waste handlers, and storage sites all can be contaminated. The following are the most common types of polluted areas:
A. Listed Wastes
Company X Landfill:
The trash ba
els are thought to include the elements indicated in Table 1 based on production and waste records, conversations with both active and former Company X workers, and the findings of test pit investigations. According to the risk assessment, 13000 containers include Polymer I trash, 5,000 contain Polymer II waste, and 2,000 have distillation tar waste. While the polymers themselves are relatively harmless, the monomers employed in the process may pose a health or environmental concern. During this time, styrene (C6H5CH=CH2) and acrylonitrile were the most often utilized onomers (CH2CHCN). At the manufacturing time, residual monomer levels in emulsion polymer products ranged from 100 to 200 parts per million (ppm); following storage, concentrations are expected to decline to 1 ppm or less. The residual monomer levels in Polymer II waste coatings were around 300-500 ppm when manufactured. However, they react to low amounts after storage. In groundwater collected from wells on the dumpsite, none of the significant monomers utilized in the emulsion polymers have been found. As a result, there is no indication that the levels of these monomers in the trash pose a hazard to groundwater. Groundwater beneath the landfill has been found to contain many organic solvents.
B. Contaminated Wastes
If contaminated media shows the hazardous characteristics of ignitability, reactivity, co
osivity, or toxicity, it might be classified as a hazardous waste. Subchapter C of Wisconsin Administrative Code ch. NR 661 outlines the test procedures to be utilized for assessing if a substance displays a hazardous feature.
According to the data presented, four organic solvents pose the greatest threat in drummed waste: xylene, toluene, MEK, and EDC. Table 2 shows the total amounts of these compounds that may still be present in the trash. While additional organic solvents may be present in trace amounts in the drummed waste, xylene, toluene, MEK, and EDC are thought to represent the most significant risk to groundwater in the case of future leaks. However, it is essential to note that while these organic solvents were present in the original product wastes, they have been substantially integrated into a polymer matrix. Even with total drum decomposition, these organic solvents are unlikely to be liberated from the polymer matrix. In addition to the four solvents, two monomers, acrylonitrile, and styrene must be considered in the risk evaluation. In the polymer waste drums, the concentration of these monomers is conservatively estimated to be 200 ppm.
[Process involved in determining hazardous waste]
    
As previously stated, it is the responsibility of the contaminated media's creator to determine if the item constitutes hazardous waste. The classification of contaminated media as a hazardous waste is determined by whether the contaminant was a waste or a product at the time of the release, the date of the release, and if the...