What happens during a biohazard cleanup

A stage-by-stage walkthrough of a professional biohazard cleanup visit, based on what two named companies publish about their own process.

This page draws on what two named companies publish about their own biohazard cleanup process: a regional Midwest operator and a local New Jersey contractor. Neither company's process is a national standard, and a specific company may combine, skip or reorder these stages depending on the job. Trauma Cleanup Guide does not perform biohazard cleanup itself.

360 Hazardous Cleanup describes its own service area directly: "We provide residential, commercial, and industrial trauma scene cleanup services in Wisconsin, Michigan, Missouri, Indiana, Iowa, Ohio, and Kentucky." That is a seven-state Midwest footprint, not a national one.

Source: 360 Hazardous Cleanup, Service Areas

PDQ Fire & Water Damage Restoration describes itself the same way: "PDQ Restoration is a women-owned restoration company, co-owned by Elizabeth Baresh, and locally owned and operated in Northern New Jersey since 2010."

Source: PDQ Restoration, About Us

Arrival and assessment

360 Hazardous Cleanup names this as the first of its six stages: "Our team inspects the scene, identifies the scope of contamination, and creates a cleanup strategy based on health and safety guidelines."

Source: 360 Hazardous Cleanup, How Long Does Biohazard Cleanup Take

PDQ names the same first phase "Assessment and Planning": "A full evaluation is done to determine the scope of contamination and outline a plan. This usually takes 1-2 hours."

Source: PDQ Fire & Water Damage Restoration, How Long Does Biohazard Cleanup Take

Personal protective equipment

When a company sends someone to do this work, that person is doing it under an employer, and OSHA's bloodborne pathogens rule defines its own scope as covering "all occupational exposure to blood or other potentially infectious materials as defined by paragraph (b) of this section." Paragraph (b) defines occupational exposure itself: "reasonably anticipated skin, eye, mucous membrane, or parenteral contact with blood or other potentially infectious materials that may result from the performance of an employee's duties." That ties the rule's coverage to work performed for an employer, not to every person who might carry out a cleanup on their own. The rule also sets a direct duty once that coverage applies: "when there is occupational exposure, the employer shall provide, at no cost to the employee, appropriate personal protective equipment such as, but not limited to, gloves, gowns, laboratory coats, face shields or masks and eye protection, and mouthpieces, resuscitation bags, pocket masks, or other ventilation devices."

Source: OSHA, 29 CFR 1910.1030, Bloodborne pathogens

Containment

360 Hazardous Cleanup names containment as its own stage, separate from assessment: "To prevent cross-contamination, affected areas are sealed off and ventilation may be redirected or filtered with HEPA systems." PDQ's four-phase list does not separately name a containment stage.

Source: 360 Hazardous Cleanup, How Long Does Biohazard Cleanup Take

Removal of biohazardous material

360 Hazardous Cleanup describes this stage directly: "All visibly contaminated items (carpets, flooring, drywall, mattresses, etc.) are removed and disposed of at licensed biohazard waste facilities."

Source: 360 Hazardous Cleanup, How Long Does Biohazard Cleanup Take

OSHA's own definitions are scoped to its workplace rule, not stated as a general legal definition: "Definitions. For purposes of this section, the following shall apply." Within that scope, OSHA defines "Regulated Waste" as "liquid or semi-liquid blood or other potentially infectious materials; contaminated items that would release blood or other potentially infectious materials in a liquid or semi-liquid state if compressed; items that are caked with dried blood or other potentially infectious materials and are capable of releasing these materials during handling; contaminated sharps; and pathological and microbiological wastes containing blood or other potentially infectious materials." Disposal itself defers to other law rather than being settled by this one rule: the same regulation states, "Disposal of all regulated waste shall be in accordance with applicable regulations of the United States, States and Territories, and political subdivisions of States and Territories."

Source: OSHA, 29 CFR 1910.1030, Bloodborne pathogens

In California, that state-law route runs through a specific statute. The Medical Waste Management Act "defines trauma scene waste as waste regulated by the Cal/OSHA Bloodborne Pathogen Standard, that '…has been removed, is to be removed, or is in the process of being removed, from a trauma scene by a Trauma Scene Waste Management Practitioner' (Section 117690, Health & Safety Code)."

Source: California Department of Public Health, Registered Trauma Scene Waste Management Practitioners, list published August 26, 2026

Cleaning and disinfection

360 Hazardous Cleanup names its own methods for this stage: "We use EPA-registered disinfectants, ATP testing, and specialty equipment to sanitize the area and eliminate pathogens."

Source: 360 Hazardous Cleanup, How Long Does Biohazard Cleanup Take

PDQ names the same general stage "Cleanup and Decontamination": "The actual removal of biohazard materials, disinfection, and blood cleanup may last from 1 to 3 days, depending on the complexity of the crime scene cleanup or trauma cleanup."

Source: PDQ Fire & Water Damage Restoration, How Long Does Biohazard Cleanup Take

Where blood or other potentially infectious materials are involved, OSHA puts a housekeeping duty on the employer, for the employer's own worksite, not as a cleanliness rule owed to the customer's property: "Employers shall ensure that the worksite is maintained in a clean and sanitary condition." That duty gets specific about work surfaces: "Contaminated work surfaces shall be decontaminated with an appropriate disinfectant after completion of procedures; immediately or as soon as feasible when surfaces are overtly contaminated or after any spill of blood or other potentially infectious materials; and at the end of the work shift if the surface may have become contaminated since the last cleaning."

Source: OSHA, 29 CFR 1910.1030, Bloodborne pathogens

Deodorization

For decomposition and similar jobs, 360 Hazardous Cleanup treats odor removal as its own stage, separate from cleaning: "Odor removal is achieved through ozone machines, hydroxyl generators, and foggers, particularly in cases of decomposition."

Source: 360 Hazardous Cleanup, How Long Does Biohazard Cleanup Take

Verification and testing

PDQ names a dedicated verification stage after cleaning: "Once cleaned, the area is tested to ensure it is free from contaminants. This step is typically completed within a day."

Source: PDQ Fire & Water Damage Restoration, How Long Does Biohazard Cleanup Take

For infectious-disease disinfection jobs specifically, not as a step in its general six-stage list, 360 Hazardous Cleanup names a testing method among that job type's own methods: "Surface ATP testing to confirm cleanliness," alongside "Electrostatic sprayers or foggers" and "Hospital-grade disinfectants."

Source: 360 Hazardous Cleanup, How Long Does Biohazard Cleanup Take

Restoration, if needed

360 Hazardous Cleanup describes the final, conditional stage: "In severe cases, we coordinate or perform reconstruction work to restore the affected space to a livable condition."

Source: 360 Hazardous Cleanup, How Long Does Biohazard Cleanup Take

PDQ frames the same stage by its effect on timing: "If any structural repairs are needed post-suicide cleanup or blood cleanup, the restoration process may add days or even weeks to the full timeline." For the published cost ranges tied to a job at each stage of severity, see biohazard cleanup cost by scenario.

Source: PDQ Fire & Water Damage Restoration, How Long Does Biohazard Cleanup Take

Neither company's list above is a universal industry sequence, and a specific company may name, combine or order its own stages differently. For what to check before a company starts this work, see who's registered to do this work and how to choose a remediation company. In California specifically, where CA registered companies are based breaks the published register down by city.