• polyaromatic hydrocarbons
  • Surface decontamination efficacy determination of DeconGelTM 1101 and 1102 on aluminum, stainless steel, and concrete surfaces contaminated with Crude Oil (polyaromatic hydrocarbons fraction) was performed with LC/MS (Liquid Chromatography/Mass Spectrometry) according to Environmental Protection Agency (EPA) SW-846 Methods: 3500C (sampling), 8321B (analysis), and 1654A (Analysis of PAH Content of Oil). (environmental-expert.com)
  • particulate
  • The higher values occurred during periods of elevated O3 and PAN concentrations, suggesting there may be an artifact effect during particulate collection associated with one or both of these two types of filters. (ca.gov)
  • methane
  • As the Sun's ultraviolet output decreases, the haze in Titan's upper atmosphere will be depleted, lessening the anti-greenhouse effect on its surface and enabling the greenhouse effect created by atmospheric methane to play a far greater role. (wikipedia.org)
  • emissions
  • His interests extend from source emissions, through atmospheric chemical and physical transformations, to human exposures and effects upon health. (wikipedia.org)
  • Examples of some results of preferential emissions from sources include hopanes, polycyclic aromatic hydrocarbons and steranes from different types of mobile sources, retene and methoxyphenols from wood smoke, odd n-alkanes and even n-alkanoic acids from vegetative detritus, cholesterol and the C16 and C18 n-alkanoic acids from cooking, and lighter n-alkanes from brake wear. (wikipedia.org)
  • soil
  • Future UK PCB air concentrations will presumably therefore be influenced (controlled) by the rate of desorption and outgassing, as soil and air concentrations move towards a condition of equilibrium partitioning. (lancs.ac.uk)
  • Estimation
  • The time weighted, shift mean concentrations of 0.02 to 0.21 micrograms/m3 benzo(a)pyrene obtained on 11 days form the basis for the industrial medical estimation of risk. (bmj.com)
  • toxic
  • The ERL and ERM measures are expressed as specific chemical concentrations of a toxic substance in sediment. (wikipedia.org)
  • The ERL indicates the concentration below which toxic effects are scarcely observed or predicted: the ERM indicates that above which effects are generally or always observed. (wikipedia.org)
  • Crude
  • Oil spills provided perfect opportunities for scientists to examine the in situ effects of crude oil exposure to marine ecosystems, and collaborative efforts between the National Oceanic and Atmospheric Administration (NOAA) and the United States Coast Guard resulted in improved response efforts and detailed research on oil pollution's effects. (wikipedia.org)
  • pollution
  • An oil spill is the release of a liquid petroleum hydrocarbon into the environment, especially the marine ecosystem, due to human activity, and is a form of pollution. (wikipedia.org)
  • contamination
  • Across the United States, NOAA has used these guidelines in regional surveys to determine the degree of contamination relative to other areas, and to identify if the concentration of a chemical exceeded guidelines, indicating a possible adverse effect. (wikipedia.org)
  • National Oceanic and At
  • The National Oceanic and Atmospheric Administration (NOAA) National Status and Trends (NS&T) Mussel Watch Program is a contaminant monitoring program that started in 1986. (wikipedia.org)
  • The numerical values are incorporated in sediment quality guidelines (SQGs) that were developed by Long and Morgan for the National Oceanic and Atmospheric Administration (NOAA) National Status & Trends program as informal tools to evaluate whether a concentration of a contaminant in sediment might have toxicological effects. (wikipedia.org)
  • different
  • The difference between the sooting tendencies of aliphatics and aromatics is thought to result mainly from the different routes of formation. (wikipedia.org)
  • range
  • The forest canopy could collected 43.2% of the atmospheric aerosol in the diameter range from 1.0 to 2.0 μm. (nii.ac.jp)
  • After ranking, both the 10th and 50th percentile concentrations are determined over the range of endpoint concentrations. (wikipedia.org)
  • The USGS has also integrated ERL and ERM values into an Alert Range Table, a table that provides ranges of contaminant concentrations that predict the likelihood of adverse effects occurring in benthic organisms for the Lake Pontchartrain Basin in Louisiana. (wikipedia.org)
  • total
  • 2-Nitrofluoranthene was the most abundant nitro-PAH, accounting for 54% of the total nitro-PAH concentration, followed by 9-nitroanthracene, 3-nitrophenanthrene and 7-nitrobenz(a)anthracene, about 15%, 16% and 10%, respectively. (environmental-expert.com)