EPA standard Articles
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Turbidimeter calibration tank
The forth generation SediMeter™ includes turbidimeters, and many customers have quality procedures that call for a way to regularly check the readings using a known standard such as Formazin. Given that the SediMeter is immersed in the liquid it measures, it needs a much larger volume than a turbidimeter that measures on a sample in a vial, for instance. Unfortunately, the liquid is ...
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Comparison of three methods to concentrate
Giardia cysts andCryptosporidium oocysts from surface and drinking watersIn this study, three methods commercialized by Pall (Envirochek HV), Idexx (FiltaMax) and Whatman (Cryptest) to concentrate Giardia cysts and Cryptosporidium oocysts from surface and drinking waters were compared according to the EPA standard protocol. Twenty litres of surface and 100 litres of drinking waters were inoculated with 103 (oo)cysts before being concentrated by filtration. Our results ...
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Determination of Aromatic Hydrocarbons in Diesel Fuel by LC-RID According to ASTM D6591
The test method presented here is applicable to the determination of mono-, di-, and tri-plus aromatic hydrocarbon (MAH, DAH, and T+AH, respectively) content in diesel fuels and middle distillates with boiling points in the range of 150° to 400° C in accordance with ASTM D6591. The accurate determination of the aromatic content of fuels is critical to assessing their quality and combustion ...
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Changes in chemical and physical properties of stream water across an urban-rural gradient in western Georgia
The Middle Chattahoochee River Watershed in western Georgia is undergoing rapid urban development. Consequently, Georgia’s water quality is threatened by extensive development as well as other land uses such as grazing. Maintenance of stream water quality, as land development occurs, is critical for the protection of drinking water, biotic integrity, and stream morphology. A two-phase, ...
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Biosolids- Considering the Types, Applications and Biosolids Drying Methods
While some water treatment plants are meant to simply make the sludge safe enough to dispose of, most facilities continue to treat the sludge so that the material can be put to good use in their communities. Once sludge is treated and processed to meet EPA safety standards for productive use, the resulting nutrient-rich organic material is termed as biosolids. Continue reading the full ...
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Defeat Devices Could Cost Volkswagen $18 billion
Can you cheat compliance? Volkswagen AG, Audi AG, and Volkswagen Group of America, Inc. (Volkswagen) recently discovered that the answer is “no.” On September 18, 2015, the U.S. Environmental Protection Agency (EPA) issued a Notice of Violation (NOV) of the federal Clean Air Act (CAA) to Volkswagen after discovering diesel cars from model years 2009 to 2015 contain software that ...
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A high-performance electropositive filter
Reverse osmosis (RO) membranes have become the industry standard for purification of any feed water source. They are used extensively for producing high-purity, low-conductivity process water. They are also used for producing ultrapure water from fresh water because RO is presumed to be the ultimate purifier. Because RO filters are readily fouled by colloidal particles and biofilms, some method ...
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Bioaugmentation process of secondary effluents for reduction of pathogens, heavy metals and antibiotics
The study probed into reducing faecal indicators and pathogenic bacteria, heavy metals and β-lactam antibiotics, from four types of secondary effluents by bioaugmentation process, which was conducted with Bacillus subtilis strain at 45 °C. As a result, faecal indicators and pathogenic bacteria were reduced due to the effect of thermal treatment process (45 °C), while the removal of heavy ...
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EPA Arsenic Treatment Demonstration - Rimrock, Arizona
In mid 2003, AdEdge was selected to implement 3 full scale Arsenic Treatment Demonstration Projects with EPA using its granular ferric oxide technology. At the Rimrock location, implementation began in September, 2003 includingengineering submittals and permitting by the Arizona Department of Environmental Quality (ADEQ). Upon completing site preparations and construction in early March, AdEdge ...
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Expect Tighter Particulate Matter Standards
Particulate matter (PM) is a hot button issue poised to raise business costs and litigation. The U.S. Environmental Protection Agency (EPA) was recently due to issue final PM standard revisions. EPA last year proposed stronger National Ambient Air Quality Standards (NAAQSs) for fine PM (2.5 micrometers or less in diameter (PM2.5)) and the 24-hour PM2.5 standard. However, EPA sought to keep ...
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New American air quality standards focus on public health
The US Environmental Protection Agency has significantly strengthened its national ambient air quality standards (NAAQS) for ground-level ozone, the primary component of smog. These changes will improve both public health protection and the protection of sensitive trees and plants. Based on its review of the air quality criteria for ozone (O3) and related photochemical oxidants and national ...
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Fast response diesel leak detection system to protect critical 24/7 operations - Case Study
Project Major global sports network broadcasting facility Location Connecticut, USA Requirement Fast and reliable remote fuel leak monitoring system Results PermAlert designed and implemented leak detection system for entire fuel system Completion Date 2017 Overview Customer’s broadcasting facility operates 24/7 to support its programming for global sports fans. Needing to ensure the ...
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Assessing the spatial pattern of iron in well water from a small central Florida community
Iron is one of the most common elements in the Earth's crust, which corresponds to it being a common constituent in drinking water supplies. Residents of Bithlo, an unincorporated community in east-central Florida, have observed that their drinking water tastes like metal and stains clothing and teeth. An evaluation of water samples collected from over 200 private drinking water wells ...
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Chemical Testing Under TSCA -- Who Is On the Hook (PDF)
Manufacturers of chemical products and products that contain significant chemical components need to be aware of subtle but important changes in the “persons required to test” provisions of Section 4 of the Toxic Substances Control Act (TSCA). Historically, those persons have included chemical manufacturers, processors, or those who intend to process or manufacture a Section 4 test rule ...
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EPA to issue delay of effective dates final rule
The U.S. Environmental Protection Agency (EPA) has scheduled a final rule to be published on on January 26, 2017, which will temporarily delay the effective date of certain regulations until March 21, 2017. This final rule is being issued in accordance with the Presidential directive entitled “Regulatory Freeze Pending Review” issued January 20, 2017. Among the 30 regulations that ...
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EPA Proposes Stronger Standards for Certified Applicators
Environmental Protection Agency (EPA) issued aproposal to revise the Certification of Pesticide Applicators rule. EPA is proposing stricter standards for people certified to use “restricted use” pesticides (certified applicators). Restricted use pesticides are not available for purchase by the general public, require special handling, and may only be applied by a certified ...
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BREEZE software releases AERMOD ISC version 7.1
BREEZE Software releases its first update to AERMOD/ISC Version 7, first introduced in early 2009.The 7.1 Version includes enhancements requested by current users.We will explore four of these new features. Roadway sshot The new roadway tool allows users to create roadways made up of volume sources. Available in BREEZE AERMOD/ISC version 7.1. ISCST3 Integration BREEZE has integrated both the ...
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EPA’s proposal to revise the air quality standards for ground-level ozone
OnJune 20, 2007, the U.S. Environmental Protection Agency (EPA) proposed to strengthen the nation’s air quality standards for ground-level ozone. Recent scientific literature has improved our understanding of the adverse effects of ozone on both human health and the environment. This article summarizes the latest scientific knowledge on the effects of ozone and the key aspects of EPA’s proposal ...
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Improving TOC Removal to Achieve EPA DBP Compliance at the Green Valley WTP
The Green Valley Water Treatment Plant (WTP) draws its water from two sources to supply Suisun, CA and surrounding communities. The WTP’s distribution system is very long resulting in lengthy detention times where free chlorine used for disinfection reacts with total organic carbon (TOC) to form high levels of Total Trihalomethanes (TTHMs). The Green Valley WTP was unable to adequately reduce the ...
By Ixom
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Semiannual Report to Congress
During this semiannual reporting period, two of our more important activities focused on the efforts of the Environmental Protection Agency (EPA) to make air safe and healthy to breathe, and to help improve homeland security. We found that EPA senior management instructed Agency staff to develop a standard for mercury that would result in a specific emission total for all coal-fired ...
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