دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

abbr: Clean Air Act.

Clean Air Act.

n: (CAA) one of the first environmental laws passed by the federal government. The CAA addresses and regulates airborne pollution that may be potentially hazardous to public health or natural resources.

n pi: the six air pollutants listed under NAAQS in the CAA: ozone, carbon monoxide, sulfur dioxide,lead. nitrogen dioxide, and particulate matter. Sometimes called conventional pollutants.

adj: involving or exposing one to risk. The lists of material or waste that are considered hazardous vary from agency to agency and from regulation to regulation: hazardous materials in transport are regulated by DOT;hazardous substances in the workplace are regulated by OSHA;hazardous waste is regulated under EPAs RCRA;toxic substances are regulated under EPAs TSCA;hazardous air pollutants are regulated under EPAs CAA;and so on. The hazardous list for that regulation is tailored to that purpose.

n: (HAP)(CAA) air emissions that are immediately hazardous to human health or that cause cancer, gene mutation, or reproductive harm. Due to its harmful nature, the allowable emission of a hazardous airborne pollutant is much lower than that for a conventional, or criteria, pollutant.

n: (MACT) air emission standards under CAA that require the best pollution prevention methods available in specific industry categories for major sources of hazardous airborne pollutants.

n pi: (NAAQS) standards listed under the CAA for six major, or criteria, pollutants: ozone, carbon monoxide, sulphur dioxide, lead, nitrogen dioxide, and particulate matter. Areas that exceed the recommended levels for these pollutants are nonattainment areas, or areas with poor air quality;areas that meet or fall below the NAAQS levels are attainment areas, or areas with good air quality.

n pI: (NESHAP) emissions standards set forth under CAA for airborne pollutants that are immediately hazardous to human health or that cause cancer, gene mutation, or reproductive harm.

n: (NSPS) CAA standards that set forth allowable emissions for new major pollution sources and major modifications to existing sources. NSPS can extend to pollutants not included in NAAQS and NESHAP and may include VOCs and hydrogen sulphide.

abbr: packer;used in drilling reports. pi abbr: pipeline;used in drilling reports. plagioclase n: a common rock-forming mineral varying in composition from sodium aluminum silicate (NaAISi30s) to calcium aluminum silicate (CaAl2Si2Os).

packer.