Biological Contamination Cleanup

What counts as biological contamination

We use the term for contamination from human sources. It's broader than a single blood spill and narrower than everything a restoration company deals with. It typically includes:

• Blood and bodily fluids spread across several surfaces or materials.
• Contamination that built up over time in a home where someone was unwell or unable to manage.
• Areas used by someone who was seriously ill, after they have moved to hospital or care.
• Public or shared spaces where an incident affected floors, furniture or fixtures.

Each of these has a more focused page. For a specific fluid, bodily-fluid cleanup is more detailed. For stains found later, see dried blood cleanup. This page is for situations where the extent itself is the main question.

Where biohazard cleanup ends and restoration begins

People sometimes call us about problems that look similar but need a different specialist. Being clear about this saves you time and money.

If an event involves both, for example a medical emergency in a bathroom that also flooded, we can handle the biological part and tell you which other trade to bring in. Our guide on biohazard cleanup versus standard restoration explains the difference in more depth.

How we assess the extent

For this kind of job, the assessment is where most of the thinking happens. We're looking for the boundary between contaminated and clean, room by room and material by material.

• History. What happened, when, and who has been in the space since. Foot traffic often explains where contamination has traveled.
• Visible signs. Staining, residue and damage, checked under strong lighting.
• Hidden areas. Under flooring, behind trim and fixtures, inside furniture, and around HVAC returns near the affected area.
• Odor. Smell often leads us to contamination that isn't visible yet.
• Materials. Whether each affected item is porous, semi-porous or non-porous, which decides whether it can be cleaned or must go.

The result is a written scope listing each area and what we propose for it. Our guide on how a biohazard assessment works walks through this.

The remediation process

1. Contain

   We separate work areas from clean areas and set up a route for bringing out waste.

2. Remove

   Contaminated porous materials are removed and sealed in packaging inside the work area.

3. Clean

   Hard surfaces are cleaned to remove residue, since disinfectants work poorly on dirty surfaces.

4. Disinfect

   We apply EPA-registered disinfectants according to label directions, including the required contact time.

5. Verify

   We re-inspect each area, including the layers exposed by removal.

6. Document and dispose

   Waste is disposed of in line with applicable Tennessee and federal requirements. You receive photos, the scope and an itemized invoice.

Who tends to call about this

Because the problem is often unclear at first, the people who call vary. Adult children clearing a parent's home after a long illness. Property managers who open a unit after a welfare check. Business owners whose staff have reported a smell in a restroom or storage room. Executors preparing a house for sale. Each of them usually asks the same first question: how bad is it, really? The honest answer is that we won't know until we look, but a phone description and a few photos often give us a fair idea of whether it's a small job or a large one.

What happens to the waste

Material contaminated with human fluids isn't ordinary household trash. In Tennessee, medical waste is classed as a "special waste" under state rules and generally can't go to a landfill unless it has been treated to make it non-infectious, according to the Tennessee Department of Environment and Conservation. We package contaminated material on site and dispose of it in line with applicable Tennessee and federal requirements. Our guide on what happens to contaminated porous materials has more on this.

Homes and businesses

In homes

Residential jobs often involve bedding, mattresses, upholstered furniture and carpet. We work around family members where we can, and we ask before removing anything personal. Related pages: residential biohazard cleanup and contaminated furniture assessment.

In businesses

Commercial spaces bring different concerns: staff and customer access, reopening, and employer obligations under the OSHA Bloodborne Pathogens Standard for employees who may be exposed. See blood cleanup in commercial buildings and our specialized remediation assessment for larger or unusual sites.

Before we arrive, and what affects cost

Keep people and pets out of the affected area, close doors, and switch off fans pointed at it if that's easy. Don't throw out contaminated items before speaking to your insurer, and don't try to clean porous materials yourself. The guide what not to do before an assessment explains why.

Cost depends on how far contamination has spread, the materials involved, the number of rooms, access, and waste volume. We'll provide a written scope; we don't publish prices. Some property insurance policies may cover some of this work depending on the policy, and we can provide documentation for your insurer. We travel from Nashville across Middle Tennessee, including Montgomery County and Robertson County; see all service areas.

Questions people ask