Maintaining a Biosafety Level 2 (BSL-2) laboratory is a careful balancing act. You aren’t simply cleaning the lab for aesthetics, you’re managing a workspace that is often home to moderate-risk agents that include pathogens such as HIV, Salmonella, and Hepatitis B. These pathogens can lead to your team getting infected with diseases if they are mishandled, which is why a “clean” space isn’t just nice—it’s a serious safety issue. If a BSL-2 lab isn’t fully disinfected in the correct way, it puts your team at risk.
That’s why effective lab cleaning and disinfecting requires more than a mop, a spray bottle, and a roll of paper towels. Instead, you’ve got to have a cleaning team that understands the requirements for these spaces and uses a rigorous approach to decontamination while still ensuring your experiments are not harmed or disrupted in anyway. And all of this must be done while ensuring compliance with all biosafety guidelines.
A standard cleaning crew isn’t going to be able to handle all of that, but experts like the team at SourceONE can. Let’s take a look at what a BSL-2 lab requires and how SourceONE can help you meet and even exceed those requirements while protecting your team and your work.
Understanding the BSL‑2 Environment
Before anyone starts cleaning, it’s crucial that they understand exactly what a BSL-2 environment entails. These labs typically work with agents that can be transmitted through the mucous membrane or by ingesting. However, because these labs also frequently make use of tools such as centrifuges, pipettes, and sharps, the risk of these agents being accidentally released into the air or even introduced to a person’s bloodstream is always present.
This is why standard cleaning techniques simply aren’t enough. All basic cleaning does is remove visible dirt and debris. It doesn’t deal with contamination. Instead, a deep decontamination cleaning must be done, which is typically split into two steps:
- Cleaning – The first is similar to basic cleaning, but it focuses on removing organic matter, including blood, that can protect pathogens from disinfectants.
- Disinfecting – The second stage is a deep chemical disinfection that eliminates all pathogenic microorganisms in the lab space.
Let’s break down the cleaning process a bit more.
Step 1: Choosing the Right EPA‑Approved Disinfectants
Just as germs and bacteria differ, so too do the various cleaners on the market. You want the disinfectants used in your BSL-2 space to meet all required EPA guidelines and be specifically rated for use in cleaning the biological agents used in your lab. Just because a cleaner states it can be used for biological cleanup doesn’t mean it addresses the specific biological agents in your lab.
What to look for in disinfectants:
- Check the label for the EPA registration number and the list of agents that the cleaner is effective against. If your lab works with any bloodborne pathogens, make certain the cleaner is rated for tuberculocidal or HIV/HBV.
- Also look at the material compatibility of the cleaner. Some cleaners are corrosive, and repeated use of these harsh chemicals on surfaces such as stainless steel or on electronics can damage the equipment.
- Look at the Safety Data Sheet or SDS for the cleaner to ensure that all ventilation requirements are met and that all cleaning staff wear the recommended personal protective equipment.
This is where working with the experts at SourceONE will save you time. Our team will review your lab cleaning needs and ensure we use the correct cleaners.
Step 2: Preparing a Fresh 10% Bleach Solution
While there are many different brands of cleaner on the market, there’s nothing quite like the basic ten percent bleach solution. It’s simply one part bleach to nine parts water, and no special bleach is required. It’s still one of the most effective and widely used cleaners in labs today. The issue, however, isn’t its effectiveness but how it’s used.
Bleach quickly degrades once it’s diluted with water. If a cleaning crew mixes up a batch of diluted bleach but doesn’t use it right away, chances are it’s not going to be effective once they do use it. For best results, a fresh solution needs to be mixed up every 24 hours. Once mixed, the solution should be kept in an opaque container—light actually causes the mixture to break down more quickly.
Contact Time, or Lack Thereof
In addition to allowing the bleach solution to degrade, another major issue with lab cleaning is the use of a simple spray and wipe technique. For a bleach solution to actually disinfect a surface in a BSL-2 lab, it needs to have contact with that surface for a minimum of ten minutes. For some pathogens and biological materials, bleach may need as long as an hour of contact time. Because the solution may evaporate before reaching the required time, repeated applications are often necessary.
Step 3: Daily Decontamination Protocols
Decontamination is more than a weekly deep clean; it’s a daily habit. In order to fully protect your team and your work from cross-contamination, you need to make certain everyone follows these rules:
- All work surfaces, including benches and safety cabinet work surfaces, need to be decontaminated daily and after any spill, no matter how small.
- Hidden hazard areas such as incubator handles, pipettes, computer keywords, and centrifuge buttons, can hide biological material. These touch points need to be decontaminated, too.
- Make certain to always clean from least contaminated to most contaminated areas. Otherwise, it’s very easy to spread pathogens and other agents into other areas, contaminating them.
Step 4: Managing Waste and the Role of the Autoclave
While cleaning the room is vital, making certain no biological agents leave the space before it’s disinfected is just as important. Biohazardous waste, including cleaning equipment and safety gear, needs to be disposed of correctly, and that means rendering them non-infectious.
This is where autoclaving comes into play. It’s the most reliable method of sterilizing items before disposing of them. It uses a stream of pressurized saturated steam to kill even the most resilient spores, bacteria, and other biological agents.
To properly make use of an autoclave, you will need to first validate that it is reaching the correct temperature and pressure to fully disinfect materials. This can be done with biological indicator strips or chemical integrators. Second, you will want to be sure all biohazard bags are left slightly open during the autoclave process. While this may seem counterintuitive, it’s important that the steam enter each bag.
The SourceOne Advantage: Expertise in Biosafety Compliance
Maintaining your BSL-2 lab according to regulations is a huge responsibility that can take your team away from their actual work. That’s why bringing in an experienced partner such as SourceONE can be an ideal solution. We provide professional lab maintenance and cleaning that go beyond what a standard janitorial service provides.
When we partner with a lab, we don’t provide a standard set of cleaning protocols. Instead, we work with you to meet and exceed your specific biosafety guidelines, creating a tailored service that meets all of your needs and prepares you for any potential audit. Our technicians understand the various cleaning chemicals, how they interact with biological agents and equipment, and how to use them safely without damaging your expensive equipment or environment.
Elevate Your Safety Standard with SourceONE
Consistency should be the foundation of BSL-2 lab safety. Whether it’s daily cleaning or the careful calibration of your autoclave system, there’s no place for shortcuts or inattention to detail. The safety of your team depends upon it. By working with SourceONE, you can rest easy knowing that we bring a rigorous disinfection schedule, customized protocols, and years of experience in the industry. Ensure your facility and your team remain safe and focused on their work by partnering with us. Reach out today to learn more.