Lab Science News - Science, chemistry and environmental news from laboratory experts

Second List of Endocrine Disruptor Chemicals Published

November 30th, 2010

Endocrine Disruptor ChemicalsIn November 2010, the EPA published a second list of chemicals for the Endocrine Disruptor Screening Program (EDSP). New to this list were those pesticides identified by the FDA and priority pollutants under the Safe Drinking Water Act that did not appear on the first list.

Learn more about Endocrine Disruptor Chemicals…


EPA Publishes Summaries on Detection, Quantitation and Calibration

November 16th, 2010

CalibrationThe EPA has recently published several document summaries about method detection limits, quantitation limits and calibration curves. To create the summaries, EPA evaluated the current use of these concepts and future needs across EPA program lines. The resulting compilations will help practitioners better understand the existing terminology and how each EPA program handles data.

Read more about the EPA Summaries…


12 Alternative Drinking Water Methods Approved

November 2nd, 2010

Drinking Water Methods Approved by EPAThe EPA has approved 12 drinking water testing methods for samples subject to the requirements of the Safe Drinking Water Act (SDWA). These methods are used in measuring levels of potential contaminants.

Read more about the drinking water methods…


New Rule Proposed for Emissions from Sewage Sludge Incinerators

October 27th, 2010

Sewage Sludge IncineratorThe EPA has proposed new rules directed at emissions from sewage sludge incinerator (SSI) units. SSI units are typically found at wastewater treatment facilities and, according to the EPA, are the sixth-largest source of mercury air emissions in the US. The proposal not only limits mercury emissions, but also sets standard and emission guidelines for eight other pollutants, including lead, cadmium, hydrogen chloride, particulate matter, carbon monoxide, dioxins and furans, nitrogen oxide, and sulfur dioxide. However, mercury is of particular interest because the proposed emission standard is more stringent than the mandates that were set under the Clean Air Act.

Learn more about Mercury emissions from sewage incinerators…


EPA Initiating Rule to Reduce Mercury from Dental Offices

October 19th, 2010

EPA Initiating Rule to Reduce Mercury from Dental OfficesRecently, the EPA announced it intends to propose a rule to reduce mercury waste from dental offices. Mercury is a concern to human health because it is considered a persistent bioaccumulative toxic element.

According to the EPA, dental amalgams, or fillings containing mercury, account for 3.7 tons of mercury discharged into US waterways each year.

Read more about Reducing Mercury from Dental Offices


EPA Action Plan for Hexabromocyclododecane

October 14th, 2010

 

HexabromocyclododecaneThe EPA is considering hexabromocyclododecane, a brominated flame retardant made up of various mixtures of its 16 isomers (herein: HBCD), for action under the Toxic Substance Control Act (TSCA). This is in addition to two other groups of compounds already discussed in previous Lab Science News articles.

HBCD is ubiquitous in the environment throughout the world and is also found in human tissues, including blood, adipose, and breast milk. When released into the environment, it can travel great distances, bioaccumulating and biomagnifing in the food chain. In addition to its high toxicity to aquatic organisms, studies have also linked HBCD to reproductive, developmental, and neurological effects in humans, with a potentially higher impact on children because of their smaller size.

Read more on hexabromocyclododecane…


EPA Action Plan for Nonylphenol and Nonylphenol Ethoxylates

October 5th, 2010

Nonylphenol ethoxylates in soaps and cleanersThis article discusses the EPA’s action plans for the compounds, nonylphenol (NP) and nonylphenol ethoxylates (NPEs).

The EPA released new action plans on August 18th, 2010 to review the potential health risks of Benzidene and its congeners, Nonylphenol (NP) and Nonylphenol Ethoxylates (NPEs), and Hexabromocyclododecane (HBCD). These compounds were chosen based on their presence in humans, their persistent, bioaccumulative, and toxic (PBT) characteristics, and their use in consumer products and production.1 The action plans may result in new use rules, new reporting limits, or the banning or limiting their production and use.

According to the EPA’s Action Plan, a major reason for reviewing NP and NPEs is their widespread release into, and their toxicity in, the aquatic environment. NP is actually a mixture of various structured compounds, that differ in their level of toxicity. NP is used primarily in manufacturing NPEs, which first break down into shorter chain NPEs over time, and then eventually back to NP. While NP is more toxic than the NPEs, they are all toxic to plants, fish and aquatic invertebrates.

Find out the types of products Nonylphenol and Nonylphenol Ethoxylates are used for…