Perfluorinated compounds (PFCs) are manmade compounds, based on the element fluorine, and are the key ingredients in stain- and water-repellent treatments such as Teflon®, Crypton® and Crypton Green®, Gore™, and Stainmaster®, and in nanotech products such as Nano-Tex™ and GreenShield™.[2] Scientists have raised concerns about PFCs because they are persistent, bioaccumulative, and toxic. Moreover, biomonitoring studies confirm widespread human exposure to this class of compounds.

Scientific studies have linked PFCs with developmental toxicity, cancer, thyroid, liver and immune system functions, cholesterol increases, and low birth measurements in newborn humans.[3] The health issues associated with PFCs, coupled with alarming data about the increasing chemical burden of these compounds in our bodies,[4] as well as the widespread exposure in wildlife, have prompted scientists and public health experts to express increasing concern about continued use of these chemicals.

In May 2009, the Stockholm Convention on Persistent Organic Pollutants (POPs) added PFOS to a growing list of chemicals recognized by international treaty as chemicals of greatest concern to be reduced or eliminated in the global environment, putting them in league with widely recognized threats such as dioxin and PCBs.

In the U.S., most major fabric treatment brands continue to use PFCs as chemical manufacturers rush to replace the most well-studied PFCs with similar fluorinated compounds that have not been heavily scrutinized. Although chemical manufacturers such as DuPont resist releasing information about the new compounds, it is clear that some are virtually unstudied, and some that scientists have studied are breaking down to PFOS and perfluorooctanic acid (PFOA), which would add to the reservoir of these persistent contaminants in the general environment. In June 2008, the Environmental Working Group (EWG) released a report on PFCs, which uncovered evidence that manufacturers’ own tests showed that many of the alternative chemicals lead “to a conclusion of substantial risk to human health or to the environment.”[5]

Like nuclear waste, the problem of PFCs isn’t going away. Still, there are steps that can be taken today to stem the tide of PFCs accumulating in our bodies. For many of the PFC applications, we can start out by simply asking ourselves whether we really need these chemicals at all.

For those wanting to understand more about PFCs and potential health concerns, HBN and Kaiser Permanente have produced a paper that examines PFCs in more detail.

Everyone has heard the news about the health concerns associated with bisphenol A (BPA) leaching from baby bottles, food can liners and perhaps most famously those distinctive polycarbonate plastic water bottles popularized by Nalgene.[1] Last May, Chicago became the first city in the U.S. to ban the sale of baby bottles and sippy cups made from BPA. Few, however, are aware that BPA is a chemical component of epoxy resins used in a wide range of building materials, typically paints, sealants, adhesives and fillers,[2] that may put manufacturing workers, installers, and building occupants at risk.

Epoxy resins are used in building materials, often listed on a material safety data sheet as a proprietary mixture, without disclosure that the resin is made from BPA. While manufacturers claim that the BPA in epoxy resins is consumed entirely in the production process and does not show up in the final products, scientists investigating the metabolic breakdown of epoxy resins during occupational exposure have found that epoxy resin products can be metabolized in the human body back into BPA and may impact the endocrine and reproductive system of those exposed.[3]Animal studies have linked this hormone-disrupting chemical to prostate cancer, breast cancer, pre-diabetes (insulin resistance), abnormal fat metabolism, early puberty, and changes in the way the brain develops resulting in behavioral abnormalities.[4] 

The BPA expert panel from the Center for Evaluation of Human Risks to Reproduction raised concern about BPA in epoxy-based resins, reporting to the National Toxicology Program that, “several studies collectively suggest hormonal effects of bisphenol A exposure, including one in occupationally exposed male workers likely exposed through multiple routes including inhalation…”[5] The NTP’s final monograph states that “a number of studies, when considered together, suggest a possible effect on reproductive hormones, especially in men exposed to higher levels of bisphenol A in the workplace.”[6] Germany has already instituted occupational exposure limits for bisphenol A.[7]

It is likely that BPA in building products will become subject to greater health and safety regulation, but responsible specifiers do not need to wait for the regulatory system to catch up with the science to protect their clients. Products are available that can replace epoxy-based coatings and adhesives. For example, many paint companies now offer high-performance low-VOC water-based acrylic paints and acrylic-based adhesives for flooring, carpets, and wall covering. For applications where high-performance BPA-free substitutes are not yet available, the act of asking manufacturer reps for products without bisphenol A is an important step to prod the industry to bring safer high performance alternatives to market.

For a comprehensive discussion of the emerging science on BPA risks, read “Bisphenol A in Building Materials: High Performance Paint Coatings.”

The CSB Investigation Report is made all the more relevant to green building professionals in light of the USGBC’s finding that PVC flooring ranked absolute worst in both human health and environmental factors compared to the alternatives reviewed. The destroyed factory, owned by Formosa Plastics, had been a major supplier of vinyl resin for Armstrong floors.

The CSB is the industrial equivalent of the National Transportation Safety Board (NTSB), the agency that rushes investigators to the scene of plane crashes, train derailments and the like. [1] The CSB’s March 6, 2007 report found among other things that the cause of this accident, “inadvertently draining a reactor, is a serious hazard in the PVC manufacturing process.” [2] Indeed just 60 days before the fatal explosion, workers at the same facility accidentally released an undisclosed amount of vinyl chloride. The report also notes that 8,000 pounds of vinyl chloride were released by accident in June 2003 at the company’s Baton Rouge, LA facility. [3] A year after the explosion, in May 2005, another 2,500 pounds of vinyl chloride were accidentally released from the company’s Delaware City, DE location. [4] Each release was caused by the same problems which led to the catastrophe at the Illiopolis facility in April 2004. Other PVC factories owned by Formosa have also suffered catastrophic explosions in the recent past. [5]

Many factors contribute to the development and aggravation of asthma. However, I am wondering whether the installation of PVC flooring in my bathroom and kitchen contributed to the worsening of my breathing.

The floor was laid three years ago. A slow leak under my sink went unnoticed until the downstairs’ neighbor’s ceiling fell. About this time, my life-long respiratory ailments worsened.

Scientists are investigating the relationship between moisture, PVC flooring, and asthma.

In Sweden, a study of 10,851 children found the presence of both floor moisture and PVC significantly increased the risk of asthma.[1] The incidences were higher in multiple family dwellings where a higher percentage of PVC flooring was found.

Many workers in an office building in Finland, over a short period of time, were diagnosed with adult-onset asthma at a rate of about 16 times higher than expected.[2] An investigation uncovered in the office air space high levels of volatile chemicals, such as 2-ethyl-l-hexanol, l-butanol, which are degradation by-products of vinyl. The problem was traced back to damp concrete surfaces below the PVC flooring.

The PVC flooring was removed and surface of the concrete slab warmed up enough to remove the volatiles that had been diffused within. In rooms cleaned up in this manner and floors replaced with ceramic tile, the emissions of the three main volatiles (2-ethyl-l-hexanol, l-butanol, and 3-heptanone) decreased, as did employees’ symptoms and many asthma patients’ needs for medication.

To make it less brittle, PVC is coated with plasticizers called phthalates. These chemicals evaporate and enter the air space where they adhere to dust particles.[3] New research shows that dust from homes containing PVC floors has higher levels of phthalates – particularly di(2-ethylhexyl) (DEHP) – than dust from homes without vinyl floors. One recent case-control study found an association between dust concentrations of phthalates inside homes and asthma, rhinitis and eczema.[4] The presence of PVC flooring in the child’s bedroom was the strongest predictor of respiratory ailments.

Other studies reach similar conclusions,[5] with one recommending “avoidance of PVC flooring in homes with small children” as a simple first step.[6]

Avoiding PVC flooring isn’t difficult, but it’s often disregarded as a cost-cutting measure.

Meanwhile, the costs associated with the increase in rates of asthma keep adding up. According to officials in my home state of Massachusetts, asthma is the number one preventable cost to hospitals.[7]

Prescription costs, doctors’ fees, lost wages due to time off from work for parents of asthmatic children, and the un-quantifiable cost of school absenteeism add up to a hefty burden for families and society.

Alternatives to PVC that are easier on the lungs exist today.

By switching to safer products we could be offering a child the priceless gift of easy breathing.
Guest columnist Niaz Dorry is a veteran activist and writer living in Gloucester, Massachusetts. She works with small-scale, traditional, and indigenous fishing communities in the U.S. and from around the globe to advance the rights and ecological benefits of the small-scale fishing communities as a means of protecting global protect marine biodiversity. In 1998, Time Magazine named Niaz as a Hero For The Planet for this work. Her fisheries articles appear regularly in a range of publications.

Chlorine gas kills and maims in a manner so heinous that it was banned as a chemical weapon after the battlefield experiences of World War I. Today, according to the Washington Post, anti-terrorist experts say there is “little doubt that plants storing large amounts of chlorine and other toxic chemicals are potential terrorist targets.” These chemicals are even more vulnerable while in transit, as the Wall Street Journal proved by following graffiti artists as they “tagged” chlorine tank cars within site of the US Capitol building, long after 9-11.