Mississippi’s regulatory framework for hazardous waste management, primarily established under the Mississippi Hazardous Waste Management Act and its associated regulations, mirrors the federal Resource Conservation and Recovery Act (RCRA) but includes specific state-level nuances. When a generator of hazardous waste in Mississippi ceases to operate, the responsibility for managing any remaining hazardous waste on-site shifts. The key principle is that the generator retains liability for the proper management and disposal of the waste, even after closure, unless a specific transfer of responsibility is legally established and approved. The Mississippi Department of Environmental Quality (MDEQ) oversees these processes. If a facility closes and leaves hazardous waste behind without proper arrangements for its management, the state may step in to ensure cleanup and disposal, and then seek cost recovery from the former owner or operator. The regulations typically require a closure plan that addresses the management of all hazardous waste, including its removal and disposal at a permitted facility, or a demonstration that the waste is no longer present or has been rendered non-hazardous through approved treatment. Without such a plan or its successful execution, the generator’s obligation persists. Therefore, the burden of ensuring proper disposal remains with the entity that generated the waste, regardless of operational status, unless a formal, MDEQ-approved transfer of such responsibility has occurred, which is rare for ongoing waste management post-closure without a specific long-term care agreement for a permitted unit. The concept of “cradle-to-grave” management extends beyond the operational life of a facility.

The Mississippi Department of Environmental Quality (MDEQ) oversees hazardous waste management within the state. Under the Resource Conservation and Recovery Act (RCRA), which is implemented in Mississippi, generators of hazardous waste are subject to specific requirements. These requirements are tiered based on the quantity of hazardous waste generated per month. Very Small Quantity Generators (VSQGs) generate 100 kilograms (kg) or less of hazardous waste per month, or 1 kilogram (kg) or less of acutely hazardous waste per month. Small Quantity Generators (SQGs) generate between 100 kg and 1,000 kg of hazardous waste per month. Large Quantity Generators (LQGs) generate 1,000 kg or more of hazardous waste per month. A generator’s classification dictates the stringency of regulations they must follow, including accumulation time limits, personnel training, contingency planning, and record-keeping. For instance, VSQGs have the least stringent requirements, while LQGs face the most comprehensive set of regulations. The scenario describes a facility in Mississippi that consistently produces 150 kg of hazardous waste monthly, with no acutely hazardous waste. This quantity falls squarely within the definition of a Small Quantity Generator (SQG) as per the established federal and state regulatory framework for hazardous waste management. Therefore, the facility must comply with the SQG requirements.

Mississippi Hazardous Waste Management regulations, specifically those aligned with the Resource Conservation and Recovery Act (RCRA) as implemented by the Mississippi Department of Environmental Quality (MDEQ), establish criteria for identifying hazardous waste. One key aspect is the characteristic of corrosivity. A waste exhibits the characteristic of corrosivity if it is aqueous and has a pH less than or equal to 2 or greater than or equal to 12.5, or if it is a liquid and corrodes steel at a specified rate. For a solid waste, the determination of corrosivity is typically made through testing. If a solid waste is determined to be corrosive, it is classified as hazardous. The scenario describes a solid waste material from a manufacturing process in Mississippi. The critical factor for determining if this solid waste is a hazardous waste due to corrosivity, under Mississippi regulations, is whether it meets the established criteria for corrosivity. The Mississippi Administrative Code, Part 22, Chapter 1, Section 103.2, defines the characteristics of hazardous waste, including corrosivity. This section specifies that a solid waste is a hazardous waste if it exhibits any of the characteristics of hazardous waste, including corrosivity. The criteria for corrosivity are based on pH for aqueous wastes and corrosion rate for metals. For solid wastes that are not aqueous, the determination of corrosivity is made through testing that simulates the conditions of a hazardous waste landfill. If the solid waste, when placed in a testing apparatus that simulates landfill conditions, corrodes carbon steel (SAE 1020) at a rate greater than \(0.635\) cm per year when tested by the methods described in EPA Publication SW-846, Method 1110A, it is considered corrosive. Therefore, the key to classifying this solid waste as hazardous due to corrosivity hinges on whether it passes this specific corrosion rate test. Without evidence of meeting or exceeding this threshold, it cannot be classified as hazardous based solely on the characteristic of corrosivity.

The Mississippi Department of Environmental Quality (MDEQ) oversees hazardous waste management within the state, primarily through the implementation of the Mississippi Hazardous Waste Management Act and its associated regulations, which are largely aligned with the federal Resource Conservation and Recovery Act (RCRA). Generators of hazardous waste are subject to specific requirements based on the quantity of waste they produce per month. Small Quantity Generators (SQGs) are defined as those who generate between 100 and 1,000 kilograms of hazardous waste per month, or less than 100 kilograms of acute hazardous waste per month. Large Quantity Generators (LQGs) generate 1,000 kilograms or more of hazardous waste per month, or more than 100 kilograms of acute hazardous waste per month. Conditionally Exempt Small Quantity Generators (CESQGs), now often referred to as Very Small Quantity Generators (VSQGs) under federal revisions, generate 100 kilograms or less of hazardous waste per month, and less than 1 kilogram of acute hazardous waste per month. These distinctions are crucial for determining the applicable regulatory requirements regarding storage, record-keeping, manifesting, and personnel training. For instance, SQGs have less stringent requirements than LQGs, and VSQGs have even fewer. The question asks about a facility generating 500 kilograms of hazardous waste and 5 kilograms of acutely hazardous waste per month. Applying the definitions, 500 kilograms of hazardous waste places the facility in the SQG category. However, the generation of 5 kilograms of acutely hazardous waste per month exceeds the 1 kilogram threshold for acutely hazardous waste for VSQGs and also exceeds the threshold for SQGs concerning acute hazardous waste. Therefore, the facility’s generation of acutely hazardous waste dictates its classification. Since 5 kilograms of acutely hazardous waste is generated, which is more than 100 kilograms but less than 1,000 kilograms, and the total hazardous waste is 500 kilograms, the facility falls into the category of a Large Quantity Generator due to the acute hazardous waste threshold. The Mississippi regulations, mirroring federal RCRA, classify a generator as an LQG if they generate 1,000 kg or more of hazardous waste per month, or if they generate 100 kg or more of acute hazardous waste per month. In this scenario, the 5 kg of acutely hazardous waste per month, while not exceeding 100 kg, is still a critical factor. However, upon closer review of typical generator status classifications, the 100 kg threshold for acute hazardous waste is the key differentiator for becoming an LQG. If a facility generates 100 kg or more of acute hazardous waste, it is an LQG. If it generates less than 100 kg of acute hazardous waste and between 100 kg and 1,000 kg of non-acute hazardous waste, it is an SQG. If it generates less than 100 kg of acute hazardous waste and less than 100 kg of non-acute hazardous waste, it is a VSQG. In this specific case, the facility generates 500 kg of hazardous waste (non-acute) and 5 kg of acute hazardous waste. The 500 kg of non-acute waste puts it into the SQG category (100-1000 kg). The 5 kg of acute hazardous waste is less than the 100 kg threshold that would automatically make it an LQG based on acute waste alone. Therefore, the generator status is determined by the combination. The Mississippi regulations, like federal RCRA, define an LQG as generating 1,000 kg or more of hazardous waste per month OR generating 100 kg or more of acute hazardous waste per month. An SQG generates between 100 kg and 1,000 kg of hazardous waste per month. A VSQG generates 100 kg or less of hazardous waste per month. The crucial point is the generation of *acute* hazardous waste. If a facility generates *any* amount of acute hazardous waste up to 100 kg, and also generates between 100 and 1000 kg of non-acute hazardous waste, it is still considered an SQG. The threshold for becoming an LQG based on acute hazardous waste is *100 kg or more*. Since the facility generates only 5 kg of acute hazardous waste, it does not meet the LQG criterion based on acute waste. Therefore, its status is determined by the non-acute hazardous waste. Generating 500 kg of hazardous waste per month places it within the Small Quantity Generator category.

Mississippi’s regulatory framework for hazardous waste management, as established under the Mississippi Hazardous Waste Management Act (MHWMA) and its associated regulations, mandates specific procedures for the closure of hazardous waste treatment, storage, and disposal facilities (TSDFs). When a TSDF ceases to operate, it must undergo a formal closure process designed to minimize future environmental and human health risks. This process involves removing or decontaminating all hazardous wastes and contaminated materials, and then closing the facility in a manner that achieves compliance with applicable environmental standards. The MHWMA and the Mississippi Department of Environmental Quality (MDEQ) regulations, specifically referencing the requirements found within the state’s adoption of federal RCRA standards, outline that a closure plan must be approved by the MDEQ. This plan details the steps necessary to close the facility, including the methods for decontamination, waste removal, and final site management. Upon completion of the closure activities as per the approved plan, the owner or operator must certify that closure has been completed in accordance with the approved plan and MDEQ requirements. The MDEQ then conducts an inspection to verify compliance. If the inspection confirms that all closure requirements have been met, the MDEQ will notify the owner or operator in writing that the facility is considered closed. This notification is a crucial step, signifying that the facility has met its post-operational obligations under the law, although long-term monitoring or post-closure care may still be required depending on the nature of the waste and the closure method.

The Mississippi Hazardous Waste Management Act, codified in Mississippi Code Annotated Title 49, Chapter 30, establishes the framework for the generation, transportation, treatment, storage, and disposal of hazardous waste within the state. A key aspect of this act is the definition and management of “hazardous waste.” According to the Act and its implementing regulations, hazardous waste is defined based on specific characteristics such as ignitability, corrosivity, reactivity, and toxicity, or if it is specifically listed by the Mississippi Department of Environmental Quality (MDEQ). The Act grants MDEQ the authority to develop and enforce these regulations, which are largely aligned with the federal Resource Conservation and Recovery Act (RCRA). When a waste exhibits any of the defined hazardous characteristics or is listed, it falls under the purview of the Act and its stringent management requirements. This includes obtaining permits for treatment, storage, and disposal facilities, manifesting waste shipments, and adhering to specific operational standards. The objective is to protect public health and the environment from the adverse effects of hazardous waste. Therefore, a waste material that meets the criteria for ignitability, corrosivity, reactivity, toxicity, or is a listed hazardous waste under Mississippi regulations is considered hazardous waste under the Act.

The Mississippi Department of Environmental Quality (MDEQ) regulates hazardous waste management under the authority of the Mississippi Hazardous Waste Management Act, which is primarily implemented through the Mississippi Administrative Code (MAC) Chapter 11, Part 2. This chapter aligns with the federal Resource Conservation and Recovery Act (RCRA). When a generator of hazardous waste discovers they have accumulated more waste than the quantity limits for their generator status, they must immediately re-classify themselves to the appropriate, higher generator category. For instance, a conditionally exempt small quantity generator (CESQG) who exceeds the 100 kg per month limit for hazardous waste or the 1 kg per month limit for acutely hazardous waste, must then manage their waste as a small quantity generator (SQG) or a large quantity generator (LQG), depending on the total quantity accumulated. This re-classification is not a notification to MDEQ but a change in operational requirements and manifest procedures. The key is that the generator must comply with the regulations for the new, higher generator status from the moment the accumulation limit is exceeded. Failure to do so constitutes a violation of the regulations. The scenario describes a CESQG exceeding their limit, necessitating a shift to SQG requirements. The immediate action required is to comply with SQG regulations, which includes manifesting shipments and adhering to the 180-day accumulation time limit, unless a 240-day extension is granted under specific conditions, which are not met here. The question probes the understanding of this immediate regulatory obligation upon exceeding generator status thresholds.

The Mississippi Department of Environmental Quality (MDEQ) regulates hazardous waste management under the authority of the Mississippi Hazardous Waste Management Act and the associated administrative regulations, often mirroring or adopting federal standards from the Resource Conservation and Recovery Act (RCRA) where applicable. Generators of hazardous waste are subject to specific requirements based on the quantity of waste they produce per month. Very Small Quantity Generators (VSQGs) are defined as those generating 100 kilograms or less of hazardous waste per month, or 1 kilogram or less of acutely hazardous waste per month. Small Quantity Generators (SQGs) are those generating between 100 and 1,000 kilograms of hazardous waste per month. Large Quantity Generators (LQGs) are those generating 1,000 kilograms or more of hazardous waste per month. The scenario describes a facility in Mississippi that generates 950 kilograms of hazardous waste in a calendar month. This quantity falls within the threshold for Small Quantity Generators, which is greater than 100 kg but less than 1,000 kg per month. Therefore, the facility must comply with the regulations applicable to Small Quantity Generators in Mississippi. These regulations typically include requirements for waste identification, accumulation time limits, container management, personnel training, and record-keeping, though they are less stringent than those for LQGs. The key differentiator is the monthly generation rate.

The Mississippi Department of Environmental Quality (MDEQ) oversees hazardous waste management within the state. When a facility generates hazardous waste, it must comply with specific regulations regarding its management. The Mississippi Hazardous Waste Management Regulations, specifically referencing the framework established by the Resource Conservation and Recovery Act (RCRA) as adopted by Mississippi, dictate these requirements. A generator is classified based on the quantity of hazardous waste produced per month. Small Quantity Generators (SQGs) are subject to less stringent requirements than Large Quantity Generators (LQGs). The threshold for SQGs is typically between 100 and 1,000 kilograms of hazardous waste per month, or less than 100 kilograms of acutely hazardous waste per month. Conversely, LQGs generate 1,000 kilograms or more of hazardous waste per month, or more than 100 kilograms of acutely hazardous waste per month. The scenario describes a facility in Mississippi that consistently generates 850 kilograms of hazardous waste per month, with no mention of acutely hazardous waste. This quantity falls squarely within the SQG classification. Therefore, the facility must comply with the SQG requirements as outlined in the Mississippi Hazardous Waste Management Regulations.

Mississippi’s hazardous waste regulations, primarily governed by the Mississippi Department of Environmental Quality (MDEQ) under the Mississippi Hazardous Waste Management Act and its associated regulations, establish a framework for managing hazardous waste from generation to final disposal. A key aspect of this framework is the definition of a hazardous waste generator, which dictates the specific regulatory requirements a facility must adhere to. Generators are categorized based on the quantity of hazardous waste they produce per month. Very Small Quantity Generators (VSQGs) produce 100 kilograms or less of hazardous waste per month, or 1 kilogram or less of acutely hazardous waste per month. Small Quantity Generators (SQGs) produce between 100 and 1,000 kilograms of hazardous waste per month. Large Quantity Generators (LQGs) produce 1,000 kilograms or more of hazardous waste per month, or more than 1 kilogram of acutely hazardous waste per month. The classification is crucial because it determines requirements for waste accumulation time limits, personnel training, emergency preparedness, record-keeping, and reporting. For instance, an SQG can accumulate hazardous waste on-site for up to 180 days without a permit, or 270 days if the waste must be transported over 200 miles. An LQG has a 90-day accumulation limit. The determination of a generator’s status is a continuous process, requiring regular evaluation of waste generation rates. If a generator’s status changes, they must notify the MDEQ within 30 days of the change. This systematic approach ensures that regulatory burdens are commensurate with the potential environmental risk posed by the quantity of hazardous waste generated.

The Mississippi Hazardous Waste Management Act, under the authority of the Mississippi Department of Environmental Quality (MDEQ), establishes a framework for managing hazardous waste. A key aspect of this framework is the identification and regulation of hazardous waste generators. Generators are categorized based on the quantity of hazardous waste they produce per month. Very Small Quantity Generators (VSQGs) are defined as entities that produce 100 kilograms or less of hazardous waste per month, or 1 kilogram or less of acute hazardous waste per month, or less than 100 kilograms of residues, contaminated materials, or soils from the cleanup of a spill, or empty containers that held acute hazardous waste. Small Quantity Generators (SQGs) produce between 100 and 1,000 kilograms of hazardous waste per month. Large Quantity Generators (LQGs) produce 1,000 kilograms or more of hazardous waste per month. The regulatory requirements for each category vary significantly, with LQGs facing the most stringent obligations regarding storage, manifesting, reporting, and emergency preparedness. The question asks about the threshold for a VSQG in Mississippi concerning hazardous waste generation. Based on the established definitions within the state’s regulatory structure, the critical quantity that distinguishes a VSQG from an SQG is the monthly generation of 100 kilograms of hazardous waste. Therefore, an entity producing 90 kilograms of hazardous waste in a calendar month falls within the VSQG classification.

The Mississippi Department of Environmental Quality (MDEQ) oversees hazardous waste management within the state, largely by implementing the Resource Conservation and Recovery Act (RCRA) as authorized by federal law and supplemented by state-specific regulations. When a facility generates hazardous waste, it must determine if it qualifies as a small quantity generator (SQG) or a large quantity generator (LQG) based on monthly generation rates. These classifications dictate the specific management, storage, and reporting requirements. For instance, an SQG in Mississippi is generally defined as a generator who produces between 100 and 1,000 kilograms of hazardous waste per month, or less than 1 kilogram of acutely hazardous waste per month. LQGs, conversely, generate 1,000 kilograms or more of hazardous waste per month, or more than 1 kilogram of acutely hazardous waste per month. The classification directly impacts aspects such as the maximum quantity of hazardous waste that can be accumulated on-site without a permit, the required personnel training, emergency preparedness plans, and the frequency of biennial reports. Understanding these thresholds and their implications is crucial for compliance and for mitigating environmental risks associated with hazardous waste. For example, an SQG has more lenient accumulation time limits and less stringent training requirements compared to an LQG, reflecting the differing levels of risk associated with the volume of waste produced. The state’s regulatory framework, aligned with federal RCRA, mandates careful tracking and proper disposal to protect public health and the environment of Mississippi.

Mississippi’s regulatory framework for hazardous waste management, as primarily governed by the Mississippi Department of Environmental Quality (MDEQ) under the Mississippi Hazardous Waste Management Act and its associated regulations, emphasizes a cradle-to-grave approach. This means that the generator of the hazardous waste retains responsibility for its management from its creation through its final disposal. When a generator ships hazardous waste off-site to a permitted treatment, storage, and disposal facility (TSDF), the generator is responsible for ensuring that the waste is properly characterized, packaged, labeled, manifested, and transported in accordance with both federal Resource Conservation and Recovery Act (RCRA) requirements and state-specific provisions. The generator must also maintain records of these shipments and receive confirmation from the TSDF that the waste has been received and managed appropriately. This responsibility continues even after the waste leaves the generator’s site. The manifest system, a key component of this responsibility, serves as a tracking document that accompanies hazardous waste from the point of generation to its final destination. If the manifest is not returned to the generator within a specified timeframe, indicating that the waste has not reached its intended destination or has not been properly disposed of, the generator has an affirmative duty to investigate and notify the regulatory agency. This proactive duty is crucial for preventing illegal dumping and ensuring environmental protection. Therefore, a generator’s obligation to ensure proper management extends beyond the initial shipment and includes diligent follow-up to confirm receipt and final disposition by the permitted facility.

The Mississippi Department of Environmental Quality (MDEQ) enforces regulations concerning hazardous waste management. Under the Resource Conservation and Recovery Act (RCRA) as implemented in Mississippi, facilities that generate, treat, store, or dispose of hazardous waste must comply with specific requirements. A key aspect of this compliance involves proper identification and management of hazardous waste. The Mississippi Hazardous Waste Management Regulations, specifically those mirroring federal RCRA regulations, define hazardous waste based on characteristics (ignitability, corrosivity, reactivity, toxicity) and listed wastes. For wastes exhibiting a characteristic, the generator is responsible for determining if the waste meets the criteria. If a waste is determined to be hazardous, it must be managed according to the applicable generator status (e.g., large quantity generator, small quantity generator). Manifesting, record-keeping, and reporting are crucial components of this management. The question focuses on the generator’s responsibility for identifying hazardous waste, which is a foundational principle. The correct response reflects the generator’s duty to determine if their waste exhibits any of the hazardous characteristics or is a listed hazardous waste, thereby triggering regulatory obligations under Mississippi law. The other options present scenarios that are either outside the scope of initial waste identification or represent secondary compliance actions that follow a determination of hazardous waste status.

The Mississippi Department of Environmental Quality (MDEQ) regulates hazardous waste management under the Mississippi Hazardous Waste Management Regulations (MHWMR). These regulations are largely based on the federal Resource Conservation and Recovery Act (RCRA). A key aspect of these regulations is the management of hazardous waste generated by conditionally exempt small quantity generators (CESQGs). Under the MHWMR, a CESQG is defined as a generator who generates no more than 100 kilograms (approximately 220 pounds) of hazardous waste per month, and no more than 1 kilogram of acute hazardous waste per month. Furthermore, a CESQG must not accumulate more than 1,000 kilograms (approximately 2,200 pounds) of hazardous waste at any time. The regulations provide specific management standards for CESQGs, allowing for more flexibility compared to larger quantity generators. These flexibilities include the ability to send hazardous waste to a municipal solid waste landfill, provided the landfill is permitted to accept such waste and the waste meets certain criteria. However, this allowance is contingent upon compliance with the generator status limitations. If a CESQG exceeds these limits, they immediately lose their CESQG status and must comply with the regulations for the next higher generator category, which is a small quantity generator (SQG). The MHWMR, specifically referencing the generator categories and their associated management requirements, dictates the proper disposal pathways.

Mississippi’s Hazardous Waste Management Act, specifically under the Mississippi Department of Environmental Quality (MDEQ) regulations, outlines the requirements for managing hazardous waste. A key aspect of this management is the proper characterization and tracking of waste streams. Generators of hazardous waste are responsible for determining if their waste meets the criteria for hazardous waste, which can be done through testing or knowledge of the process. If a waste exhibits characteristics of hazardous waste (ignitability, corrosivity, reactivity, or toxicity) or is specifically listed as hazardous by the U.S. Environmental Protection Agency (EPA) and adopted by Mississippi, it must be managed according to hazardous waste regulations. The concept of “cradle-to-grave” management, established by the Resource Conservation and Recovery Act (RCRA) and mirrored in state regulations, means that the generator remains responsible for the waste from its generation until its final disposition. This includes proper storage, labeling, transportation by licensed haulers, and disposal at permitted treatment, storage, and disposal facilities (TSDFs). Manifesting is a critical component of this tracking system, ensuring that the waste’s movement is documented at each stage. Failure to comply can result in significant penalties. Therefore, understanding the specific characteristics that define hazardous waste under Mississippi law, such as the presence of listed constituents or the exhibition of characteristic properties, is fundamental for compliance. The question probes the generator’s initial responsibility in accurately classifying their waste, which dictates all subsequent management steps.

Mississippi’s Hazardous Waste Management Act, codified in Mississippi Code Annotated Title 49, Chapter 35, establishes a framework for the management of hazardous waste within the state. This act grants the Mississippi Department of Environmental Quality (MDEQ) the authority to implement regulations consistent with the federal Resource Conservation and Recovery Act (RCRA). A key aspect of hazardous waste regulation involves the identification and management of hazardous waste constituents and the establishment of facility standards. When a facility generates a waste stream, it must determine if that waste is hazardous according to the criteria outlined in the regulations, which include characteristics like ignitability, corrosivity, reactivity, and toxicity, as well as specific listings of hazardous wastes. For a facility to operate a hazardous waste treatment, storage, or disposal facility (TSDF), it must obtain a permit from the MDEQ. The permit process involves a thorough review of the facility’s design, operation, and management plans to ensure compliance with all applicable state and federal requirements. This includes demonstrating financial assurance for closure and post-closure care, as well as contingency planning for emergencies. The MDEQ’s oversight ensures that hazardous waste is managed in a manner that protects human health and the environment. The question probes the understanding of the MDEQ’s permitting authority for TSDFs under Mississippi law, emphasizing the necessity of such permits for any entity undertaking these activities.

The Mississippi Hazardous Waste Management Act, specifically referencing the regulatory framework established under the Mississippi Department of Environmental Quality (MDEQ), outlines procedures for the management of hazardous waste. A key aspect of this regulation involves the definition of a “generator” and the corresponding responsibilities based on the quantity of hazardous waste produced within a calendar month. For small quantity generators (SQGs), the threshold is typically between 100 and 1,000 kilograms of hazardous waste per month, or less than 1 kilogram of acutely hazardous waste. Large quantity generators (LQGs) exceed 1,000 kilograms per month. Conditionally exempt small quantity generators (CESQGs) produce 100 kilograms or less of hazardous waste per month and less than 1 kilogram of acutely hazardous waste. The question asks about a facility that generates 850 kilograms of hazardous waste and 0.5 kilograms of acutely hazardous waste in a calendar month. Applying the definitions, 850 kilograms falls within the 100 to 1,000 kilogram range for hazardous waste, and 0.5 kilograms is below the 1 kilogram threshold for acutely hazardous waste. Therefore, this facility qualifies as a small quantity generator. The regulatory requirements for SQGs are less stringent than for LQGs but more rigorous than for CESQGs, often involving specific storage limits, personnel training, and emergency preparedness plans. The Mississippi framework aligns with the federal Resource Conservation and Recovery Act (RCRA) in these classifications.

Mississippi’s Hazardous Waste Management Act, Chapter 28 of Title 49 of the Mississippi Code, provides the framework for managing hazardous waste. A critical aspect of this act is the definition and regulation of “hazardous waste” itself. The Mississippi Department of Environmental Quality (MDEQ) is the primary agency responsible for implementing these regulations. The Act defines hazardous waste through a combination of characteristics and listings. Characteristic wastes are those exhibiting ignitability, corrosivity, reactivity, or toxicity, as determined by specific testing protocols. Listed wastes are those specifically identified by the MDEQ as hazardous due to their origin or composition. For a substance to be regulated as hazardous waste in Mississippi, it must meet the criteria established in the Mississippi Hazardous Waste Management Regulations, which are promulgated under the authority of the Act. These regulations align with federal Resource Conservation and Recovery Act (RCRA) definitions but may include state-specific nuances. Therefore, a substance is considered hazardous waste in Mississippi if it is either a listed hazardous waste or exhibits one or more of the defined hazardous characteristics, and is not otherwise excluded by regulation. The Act’s intent is to manage these wastes from generation to final disposal to protect human health and the environment.

The Mississippi Department of Environmental Quality (MDEQ) oversees hazardous waste management within the state. Under the Resource Conservation and Recovery Act (RCRA) framework, states are authorized to implement their own hazardous waste programs, which must be at least as stringent as the federal program. Mississippi’s program is detailed in the Mississippi Administrative Code (MAC) Title 11, Part 62, Chapter 1. Specifically, the management of hazardous waste from the generation to disposal is regulated. Generators of hazardous waste are classified based on the quantity of hazardous waste produced per month. Very Small Quantity Generators (VSQGs) are those who generate 100 kilograms (kg) or less of hazardous waste per month, or less than 1 kg of acute hazardous waste per month. Small Quantity Generators (SQGs) generate between 100 kg and 1,000 kg of hazardous waste per month. Large Quantity Generators (LQGs) generate 1,000 kg or more of hazardous waste per month. The question asks about the threshold for a facility to be considered a Small Quantity Generator in Mississippi. Based on the Mississippi Administrative Code, Title 11, Part 62, Chapter 1, Subchapter 3, Section 262.13(a), a generator is classified as a Small Quantity Generator if they generate more than 100 kilograms but less than 1,000 kilograms of hazardous waste per calendar month. Therefore, the correct threshold for a Small Quantity Generator is generating more than 100 kg but less than 1,000 kg of hazardous waste per month.

Mississippi’s Hazardous Waste Management Act, codified in Mississippi Code Annotated Title 49, Chapter 30, establishes the framework for managing hazardous waste within the state. This act delegates significant authority to the Mississippi Department of Environmental Quality (MDEQ) to develop and enforce regulations, often mirroring or exceeding federal Resource Conservation and Recovery Act (RCRA) requirements. Generators of hazardous waste are subject to specific management standards based on the quantity of waste produced. Small Quantity Generators (SQGs) are defined as those who generate between 100 and 1,000 kilograms of hazardous waste per month, or less than 1 kilogram of acutely hazardous waste per month. Large Quantity Generators (LQGs) are those who generate 1,000 kilograms or more of hazardous waste per month, or more than 1 kilogram of acutely hazardous waste per month. Conditionally Exempt Small Quantity Generators (CESQGs), now often referred to as Very Small Quantity Generators (VSQGs) under federal updates, generate 100 kilograms or less of hazardous waste per month and are subject to the least stringent requirements. The classification dictates applicable storage limits, personnel training, emergency preparedness, record-keeping, and reporting obligations. For instance, LQGs must comply with more rigorous requirements regarding personnel training, contingency plans, and biennial reporting compared to SQGs or VSQGs. Understanding these thresholds is crucial for compliance and to avoid penalties.

The Mississippi Department of Environmental Quality (MDEQ) oversees hazardous waste management within the state, primarily through the Mississippi Hazardous Waste Management Regulations (MHWMR), which are largely based on the federal Resource Conservation and Recovery Act (RCRA). A key aspect of these regulations involves the management of hazardous waste by generators. Small Quantity Generators (SQGs) in Mississippi, like their federal counterparts, are subject to specific accumulation time limits and quantity thresholds to maintain their generator status. For SQGs, the typical accumulation time limit for hazardous waste on-site before it must be shipped off-site to a permitted treatment, storage, or disposal facility (TSDF) is 180 days. However, if the SQG needs to transport the waste over 200 miles, this limit can be extended to 270 days. This extension is a crucial allowance for SQGs that may have logistical challenges in finding a suitable TSDF within closer proximity. Failure to adhere to these accumulation limits can result in a generator being reclassified as a Large Quantity Generator (LQG), which imposes significantly more stringent regulatory requirements. The MHWMR aims to ensure that hazardous waste is managed in a manner that protects human health and the environment, and these accumulation time limits are a fundamental component of that framework, balancing the operational needs of generators with the imperative of timely and safe waste management.

The Mississippi Department of Environmental Quality (MDEQ) oversees hazardous waste management under the Hazardous Waste Management Act, which is largely aligned with the federal Resource Conservation and Recovery Act (RCRA). Generators of hazardous waste are subject to specific requirements based on the quantity of waste they produce. These categories are Very Small Quantity Generators (VSQGs), Small Quantity Generators (SQGs), and Large Quantity Generators (LQGs). The threshold for a VSQG is generating no more than 100 kilograms (approximately 220 pounds) of hazardous waste per month, or no more than 1 kilogram of acute hazardous waste per month, and accumulating no more than 1,000 kilograms of hazardous waste at any time. An SQG generates more than 100 kilograms but less than 1,000 kilograms of hazardous waste per month and accumulates no more than 6,000 kilograms of hazardous waste at any time. An LQG generates 1,000 kilograms or more of hazardous waste per month, or more than 1 kilogram of acute hazardous waste per month, or accumulates more than 6,000 kilograms of hazardous waste at any time. The scenario describes a facility in Mississippi that consistently generates 150 kilograms of hazardous waste per month and has a one-time accumulation of 800 kilograms of hazardous waste. Since the monthly generation (150 kg) exceeds the VSQG threshold (100 kg) but is below the SQG threshold (1,000 kg), and the accumulation (800 kg) is below both the VSQG accumulation limit (1,000 kg) and the SQG accumulation limit (6,000 kg), the facility qualifies as a Small Quantity Generator. This classification dictates specific regulatory requirements for storage, record-keeping, and reporting, which are less stringent than those for LQGs but more rigorous than those for VSQGs. Understanding these distinctions is crucial for compliance with Mississippi’s hazardous waste regulations.

The Mississippi Department of Environmental Quality (MDEQ) oversees hazardous waste management within the state. The Resource Conservation and Recovery Act (RCRA) forms the federal framework, which Mississippi has adopted and supplemented with state-specific regulations. A key aspect of RCRA, and thus Mississippi’s hazardous waste law, is the cradle-to-grave management of hazardous waste. This involves tracking waste from its generation through its transportation, treatment, storage, and final disposal. Generators of hazardous waste are responsible for identifying their waste, obtaining an EPA identification number, complying with manifesting requirements for off-site shipments, and ensuring proper storage and disposal. Transporters must also comply with manifesting and record-keeping requirements. Treatment, storage, and disposal facilities (TSDFs) are subject to stringent permitting, operational, closure, and post-closure care requirements. The concept of “imminent and substantial endangerment” is a critical enforcement provision, allowing the MDEQ to take action to prevent or abate conditions that pose a risk to public health or the environment, even if those conditions do not strictly conform to existing regulations. This authority is broad and can involve administrative orders, civil penalties, and injunctions. The question focuses on the proactive measures a generator must take when they discover historical, unmanifested hazardous waste on their property that was not generated by their current operations. This scenario falls under the purview of corrective action requirements for facilities that receive hazardous waste, but also implicates the generator’s responsibility for waste they may have indirectly managed or discovered. In Mississippi, as under RCRA, a generator’s responsibility can extend to waste they did not initially produce if they are deemed to have managed or controlled it, or if the waste poses a present threat. The most appropriate immediate action for a facility discovering such waste is to notify the MDEQ, as this is a regulatory requirement for discovering uncontrolled or unmanifested hazardous waste, and it allows the agency to guide the subsequent investigation and remediation process. Other options, while potentially part of a remediation plan, are not the primary or legally mandated initial step upon discovery of previously unmanaged hazardous waste.

Mississippi’s Hazardous Waste Management Act, specifically Mississippi Code Annotated Section 49-30-5, grants the Mississippi Department of Environmental Quality (MDEQ) the authority to establish and implement regulations for the management of hazardous waste. This includes the requirement for generators of hazardous waste to obtain identification numbers, maintain records, and comply with manifest requirements for off-site transportation. Furthermore, the Act mandates that facilities that treat, store, or dispose of hazardous waste must obtain permits from the MDEQ. The Act also addresses emergency preparedness and contingency plans for hazardous waste facilities, as well as provisions for corrective action and remediation of contaminated sites. The specific regulatory framework is detailed in the Mississippi Administrative Code, particularly within the Hazardous Waste Management Regulations. Understanding the scope of MDEQ’s authority and the specific obligations placed upon hazardous waste handlers is crucial for compliance. The Act emphasizes a cradle-to-grave management system, ensuring that hazardous waste is tracked and managed safely from its generation to its final disposal. This includes provisions for public participation in the permitting process and enforcement mechanisms to ensure compliance with the established standards.

The Mississippi Hazardous Waste Management Act, codified in Mississippi Code Annotated Title 49, Chapter 35, establishes the framework for managing hazardous waste within the state. A key aspect of this legislation involves the classification of waste and the responsibilities of generators. When a facility generates a waste stream that is not explicitly listed as hazardous by the Mississippi Department of Environmental Quality (MDEQ) or the U.S. Environmental Protection Agency (EPA), the generator bears the burden of determining if the waste exhibits hazardous characteristics. These characteristics, as defined by both federal and state regulations, include ignitability, corrosivity, reactivity, and toxicity. The toxicity characteristic is typically determined through the Toxicity Characteristic Leaching Procedure (TCLP). If the waste fails the TCLP for any of the regulated constituents, it is classified as hazardous. Generators of hazardous waste are then subject to specific requirements regarding storage, record-keeping, manifesting, and disposal at permitted treatment, storage, and disposal facilities (TSDFs). Failure to properly classify and manage hazardous waste can result in significant penalties. The question assesses understanding of the generator’s responsibility in characterizing waste when it is not a listed hazardous waste, emphasizing the role of characteristic properties.

The Mississippi Department of Environmental Quality (MDEQ) enforces regulations concerning hazardous waste management, which are largely based on the federal Resource Conservation and Recovery Act (RCRA). A key aspect of these regulations involves the classification of waste. When a generator produces a waste stream, they must determine if it is a hazardous waste. This determination is crucial for subsequent management, manifesting, and disposal requirements. Mississippi’s regulations, mirroring RCRA, define hazardous waste through lists (F, K, P, U lists) and characteristics (ignitability, corrosivity, reactivity, toxicity). For a waste to be considered hazardous by characteristic, it must exhibit at least one of these properties. The Toxicity Characteristic Leaching Procedure (TCLP) is a standardized laboratory test used to determine if a waste exhibits the toxicity characteristic. If the leachate from a TCLP test for a specific constituent exceeds regulatory limits, the waste is classified as hazardous due to toxicity. For example, if a waste is tested using TCLP and the concentration of lead in the leachate is found to be 7.5 mg/L, and the regulatory limit for lead under the toxicity characteristic is 5.0 mg/L, then the waste exhibits the toxicity characteristic. Mississippi’s hazardous waste regulations, found in the Mississippi Administrative Code, Title 11, Part 1300, Chapter 1, establish these criteria and procedures. Generators are responsible for making these determinations accurately to ensure compliance. The regulatory framework aims to prevent the improper disposal of wastes that could pose a substantial threat to human health and the environment.

The Mississippi Department of Environmental Quality (MDEQ) regulates hazardous waste management under the Mississippi Hazardous Waste Management Act and its associated regulations, which are largely based on the federal Resource Conservation and Recovery Act (RCRA). Generators of hazardous waste are subject to specific requirements based on the quantity of waste they produce per month. Very Small Quantity Generators (VSQGs) are defined as those who generate 100 kilograms (kg) or less of hazardous waste per month, or less than 1 kg of acutely hazardous waste per month, or less than 100 kg of spill residue from acute hazardous waste per month. Small Quantity Generators (SQGs) are those who generate more than 100 kg but less than 1,000 kg of hazardous waste per month. Large Quantity Generators (LQGs) are those who generate 1,000 kg or more of hazardous waste per month, or more than 1 kg of acutely hazardous waste per month, or more than 100 kg of spill residue from acute hazardous waste per month. The scenario describes a facility generating 150 kg of hazardous waste and 0.5 kg of acutely hazardous waste in a calendar month. To determine the generator status, we examine both thresholds. The generation of 150 kg of hazardous waste places the facility above the VSQG threshold (100 kg) and within the SQG category (100 kg < 150 kg < 1,000 kg). However, the generation of 0.5 kg of acutely hazardous waste is below the SQG threshold for acutely hazardous waste (1 kg). Therefore, the facility's generator status is determined by the non-acute hazardous waste quantity. Since 150 kg is greater than 100 kg but less than 1,000 kg, the facility is classified as a Small Quantity Generator.

The Mississippi Department of Environmental Quality (MDEQ) regulates hazardous waste management under the Mississippi Hazardous Waste Management Regulations (MHWMR), which are largely based on the federal Resource Conservation and Recovery Act (RCRA). A key aspect of these regulations pertains to the management of hazardous waste by conditionally exempt small quantity generators (CESQGs). In Mississippi, a CESQG is defined as a generator who produces no more than 100 kilograms (approximately 220 pounds) of hazardous waste per month, and no more than 1 kilogram (approximately 2.2 pounds) of acute hazardous waste per month. Furthermore, a CESQG must not accumulate more than 1,000 kilograms (approximately 2,200 pounds) of hazardous waste at any time. The regulations also stipulate that CESQGs must not accumulate hazardous waste on-site for more than 180 days, unless the waste is transported to a treatment, storage, and disposal facility (TSDF) located within the United States that is permitted to manage the waste, in which case the accumulation period can be extended to 270 days. This distinction in accumulation time is critical for ensuring proper management and preventing environmental contamination. Therefore, a CESQG in Mississippi can accumulate hazardous waste for up to 270 days if it is being transported to a permitted TSDF within the United States.

The Mississippi Hazardous Waste Management Act, specifically its provisions concerning the management of hazardous waste, mandates that facilities generating hazardous waste must comply with stringent record-keeping requirements. These requirements are designed to track hazardous waste from its generation point through its transportation, treatment, storage, and ultimate disposal. The Act, in alignment with federal Resource Conservation and Recovery Act (RCRA) regulations, requires generators to maintain records that demonstrate compliance with all applicable standards. For hazardous waste manifests, the generator is typically required to retain a copy of each manifest for a minimum of three years from the date the waste was last sent to an off-site facility. This retention period is crucial for demonstrating the proper cradle-to-grave management of the waste. The manifest serves as a key document in this process, detailing the type and quantity of hazardous waste, its origin, the transporter, and the designated treatment, storage, or disposal facility. The three-year period allows for adequate oversight and audit by regulatory agencies. Failure to maintain these records can result in significant penalties under Mississippi law. The core principle is accountability and traceability in the hazardous waste management chain.