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

Posts Tagged ‘Wastewater’

EPA Initiating Rule to Reduce Mercury from Dental Offices

Tuesday, 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

New and Revised Clean Water Act Methods Proposed

Thursday, September 23rd, 2010

New and Revised Clean Water Act Methods ProposedIn August 2010 the EPA issued a notice proposing new and revised analytical methods to be used under the Clean Water Act (CWA).

The proposed rule, entitled “Guidelines Establishing Test Procedures for the Analysis of Pollutants Under the Clean Water Act; Analysis and Sampling Procedures”, will affect numerous EPA Methods, ASTM Methods, Standard Methods, and alternative test methods.

EPA methods:

Read more about the proposed CWA Methods…

Proposed NPDES Rule Requires ‘Sufficiently Sensitive’ Test Methods

Monday, August 2nd, 2010

Sufficiently Sensitive Test Methods

In a Federal Register notice published June 23, the EPA proposed changes to its permitting program under the Clean Water Act (CWA) to ensure the use of sufficiently sensitive analytical methods for monitoring chemical pollutants in discharge water.

Specifically, the new rule affects the CWA’s National Pollutant Discharge Elimination System (NPDES). Its purpose is to specify that applicants and permittees must use analytical methods that are capable of detecting and measuring pollutants at, or below, current water quality criteria.

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How to Determine Aquatic Humic Substances

Monday, June 28th, 2010

By Lynda Huckestein, Project Chemist, Kelso, WA

How to Determine Aquatic Humic Substances

Aquatic Humic Substances (AHS) result from the decomposition of plant and animal residues and are found in soil, sediment, and water. They are widespread in nature and are mostly comprised from naturally occurring dissolved organic matter in water.

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