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Once in the soil solution, urea—formaldehyde reaction products are converted to plant available nitrogen through either microbial decomposition or hydrolysis. Microbial decomposition is the primary mechanism. The carbon in the methylene urea polymers is the site of microbial activity. Environmental factors that affect soil microbial activity also affect the nitrogen availabiUty of UF products. These factors include soil temperature, moisture, pH, and aeration or oxygen availabiUty. 

Organoarsenic compounds have been of importance in human toxicology but have not as yet received much attention in regard to environmental effects. Like methyl mercury compounds, they are both synthesized in the environment from inorganic forms and released into the environment as a consequence of human activity (Environmental Health Criteria 18). They can cause neurotoxicity. 

Tyler, C.R., Beresford, N., and van der Woning, M. et al. (2000). Metabolism and environmental degradation of pyrethroid insecticides produce compounds with endocrine activities. Environmental Toxicology and Chemistry 19, 801-809. 

Lead is dispersed throughout the environment primarily as the result of anthropogenic activities. Environmental fate processes may transform one lead compound to another however, lead is not degraded and is still available for human exposure, even though the compounds containing it vary enormously. 

Norfolk Southern Graniteville Derailment - Final Information Update as of]anuary21,2005 (Homes, Schools, Traffic, Crash Site Activities, Environmental, Hospitals, Law Enforcement Fire Service, Family Pets, Government Services, Local Assistance Center, Aiken County Summary Court, Aiken County 211). U.S. E.P.A. Region 4, Southwest March 12, 2006. 

Larson RA, Bott TL, Hunt LL, et al. 1979. Photooxidation products of a fuel oil and their antimicrobial activity. Environmental Science and Technology 13(8) 965-969. 

T0005 Active Environmental Technologies, Inc., TechXtract T0058 Arctic Foundations, Inc., Cryogenic Barrier... 

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