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Environmental Newsletter

October 2023

Every day, Clark Seif Clark professionals are deployed across the nation helping both large and small customers resolve health & safety, industrial hygiene, environmental and indoor air quality issues.

At a moment's notice, Clark Seif Clark can send their experts anywhere they are needed. No matter if it's in response to a hurricane, wildfire, flood, tornado or other natural disaster, Clark Seif Clark is ready to help and can respond in no time at all.

National Indoor Air Quality Awareness Month and Resources to Optimize the Built Environment

For most people, a comfortable temperature and relative humidity, good ventilation, and a lack of unpleasant odors are key indoor air quality (IAQ) components. Equally important is understanding and controlling unseen airborne pollutants commonly found indoors to help reduce the risk of health concerns.

On average, Americans spend about 90% of their time indoors. The concentrations of some indoor pollutants can be 2 to 5 times higher than typical outdoor concentrations according to the U.S. Environmental Protection Agency (EPA). To focus attention on this, and the overall importance of IAQ in homes, schools, businesses and other built environments, October is recognized as National Indoor Air Quality Awareness Month.

“Indoor pollutants impacting your facility can originate from numerous sources, including cleanliness issues, lack of ventilation, dampness, construction activities taking place inside the building, smoking, cooking, indoor activities, new building materials and furnishing, how many people are in the building, and so much more,” said Derrick A. Denis, Vice President of Indoor Environmental Quality for Clark Seif Clark (CSC). “Some of the more common IAQ pollutants include mold, pollen, particulate matter, sewer gas, animal dander, radon, formaldehyde and other volatile organic compounds (VOCs), pesticides, lead, asbestos, carbon monoxide and combustion gases, and tobacco and marijuana smoke to name just a few. These pollutants can even come from a combination of outdoor and indoor sources. This is why it takes an experienced IAQ professional to be able to assess potential issues and to come up with real solutions to improve indoor conditions.”


Dedicated to helping clients create optimal indoor environments in residential, commercial and institutional properties are the building science and industrial hygiene experts at CSC. Their professionals provide building assessments, testing and monitoring to identify and mitigate exposure risks to a wide range of chemical and microbial concerns.


Last year, CSC sponsored an educational video about National Indoor Air Quality Awareness Month that can still be seen below: 

To learn more about this or other indoor air quality, industrial hygiene, environmental, health and safety services, please:

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Resources to Help Prevent New Cases of Legionnaires’ Disease and Pontiac Fever 

Legionnaires’ disease is described by the Centers for Disease Control and Prevention (CDC) as a serious type of pneumonia caused by exposure to a type of bacteria known as Legionella. The bacteria can also cause Pontiac fever, a less serious illness.


Legionella can be found naturally in freshwater environments. It becomes a significant health concern if it grows and spreads in man-made water systems. This is due to the fact that water containing Legionella can spread in droplets small enough for people to inhale, which is how people get infected. Tragically, the condition is fatal for about 1 in 10 who develop Legionnaires’ disease.

Most healthy people exposed to Legionella do not get sick. People at increased risk according to the CDC include:

  • People 50 years or older
  • Current or former smokers
  • Those with a chronic lung disease (like COPD or emphysema)
  • People with weak immune systems or who take drugs that weaken the immune system (like after a transplant operation or chemotherapy)
  • Those with cancer
  • People with underlying illnesses such as diabetes, kidney failure or liver failure

“Other potential sources of Legionella, in addition to building water systems, may include hot tubs, cooling towers, decorative fountains and even cisterns,” said Zahid Iqbal, MPH, CIH and Technical Director at Clark Seif Clark (CSC). “These are all reasons why water management programs to reduce exposure risks are so important. At CSC, our infection control, industrial hygiene and environmental professionals are dedicated to helping hospitals, long-term care centers, businesses and other clients develop, administer and monitor water management programs. These services, along with proactive testing, can help to prevent outbreaks. If one has already occurred, these resources can be instrumental for quickly identifying the source of the Legionella to prevent further infections.”


CSC also recently sponsored an educational video about Legionella and Legionnaires’ disease that can be seen below:

To learn more about this or other infection control, indoor air quality, building science, environmental, health and safety services, please visit, email [email protected] or call (800) 807-1118.

About Clark Seif Clark: CSC was established in 1989 to help clients in both the public and private sectors address environmental issues. CSC is a leading provider of these services with multiple offices along the western seaboard and southwest. The company believes in science-based protocols and has a strong background in engineering making them the preferred environmental consultants to healthcare facilities, architects, schools, builders, contractors, developers and real estate professionals.
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