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Wastewater and other liquids placed in surface impoundments are often the source of volatile chemical emissions to air. The overall objective of this work was to determine the magnitude of the flux rate of organic compounds that are emitted into the air from selected wastewatertreatment facilities for the pulp and paper industry. In order to make these measurements, it was necessar to develop a field-sampling methodology, hereafter d e d the concentration profile method (CPM), and a laboratoryanalysis methodology to trap and measure low-molecular weight, volatile organics in air.Various organizations, including the chemical process industries, and federal and state agencies, are concerned about aspects of air emissions from wastewater-treatment basins. In some cases, efforts are aimed at odor control. In other cases, there is concern for the emission of hazardous substances, which originate from surface impoundments, into the air. There is also a general concern for emission of vapor-phase organics and inorganics from wastewatertreatment basins. The placement of organic compounds (non-sulfurous) in these basins gives rise to vapor-phase organic (non-methane) emissions that increase the quantity of hydrocarbons in the nearby air mass. In this regard, attention has been focused on wastewater-treatment basins as a source of potentially hazardous trace contaminants to air.As a result of interest generated during an EPA demonstration pro'ect with Georgia Kraft Company, that evaluwastewater cooling, biotreatment, and strip ing operadevelop an apparatus to quantify the air-strippable organic fraction in industrial wastewater [ I , 21. A mathematical simulation of air-stri ping and natural desorption from quantity of volatile organic material is escaping treatment by the air route [a], Further studies ofraw wastewaters representing a broad spectrum of industrial operations including the wood-products industr suggested that a volatile-and easily stripped by air [4]. Gas chromatograpldmass spectrometer analysis of organic compounds in treated Kraft-mill wastewater indicates that many of these compounds are know volatile chemicals (5). uestion that quantities of chemicals are treatment facilities. The question is how much of what chemicals are desorbin Due to various sinks for chemichemical oxidation, adsorption upon the sediments and particulate matter, etc., a realistic approach to quantifying Environmental Progress (Vol. 3, No. 2) ated the e d ectiveness of cooling towers as a combined tion, research was initiated at the University o P Arkansas to aerated stabilization \ asins suggested that a significant significant fraction of the discharge J organic material was escaping throug R the air-water interface of wastewatercals in the facilities, w f ich include water seepage, bio-There is no the flux to the air is to perform measurements in the air boundary layer immediately above the water surface. The method presented is a variation of the "aerodynamic method" employed to measure the flux of pesticides from soil surface [...