CWEA Lab Analyst Grade I Vocab | Verified

40 CFR 121- 124 - The federal storm water regulations for the permitting of municipalities and industries. Regulations define storm water terms, permitting, inspecting, and sampling measurements 40 CFR 136 - The regulations for sampling preservation and analyses of water, wastewater, and solid waste 40 CFR 403 - The federal regulations defining the elements of a pretreatment program, prohibited discharges, and the approval process for establishing a pretreatment program Acid - A compound which liberates hydrogen ions and has a pH below 7 Alkalinity - The measurement of a sample's capacity to neutralize acid Approval Authority - The agency determining whether a pretreatment program contains the necessary elements to meet the intent of the Act Atomic Weight - The sum of the number of protons and the number of neutrons in the nucleus of an atom; atomic weights of elements are found on the periodic table Base - A compound which liberates hydroxide ions and have a pH above 7 Biochemical Oxygen Demands (BOD) - The quality of oxygen utilized in the biochemical oxidation of organic matter under standard lab procedures for 5 days at 20 °C, usually expressed as a concentration (mg/L). BOD measurements are used to indicate the organic "strength" of wastewater Biological Treament - A waste treatment process by which bacteria and other microorganisms break down complex organic or inorganic (ie ammonia) materials into simple, nontoxic, more stable compounds Categorical Industrial User (CIU) - An industrial user (refer to IU) that is conducting processes subject to a categorical standard promulgated by the US EPA centrifugal pumps - pumps using centrifugal force to convey liquid. Discharge will vary according to inlet and discharge pressure Chain-of- Custody - A legal record (which may be a series of records) of each person who had possession of an environmental sample, from the person releasing the sample, to the person who collected the sample, to the person who analyzed the sample in the laboratory, to the person who witnessed the disposal of the sample Chemical Oxygen Demand (COD) - The amount of oxygen (expressed in mg/L) consumed from the oxidation of pollutants during a specific test As such, COD is a measure of the oxygen-consuming capacity of the pollutant present in wastewater. The results of the COD test are not necessarily related to the BOD, because the chemical oxidant responsible for utilizing the oxygen may react with substances which bacteria do no stabilize. Cipolletti Water - A trapezoidal sharp-crested weir for measurement of liquid discharge in open channels Clean Water Act (CWA) - Public law (PL 92-500) enacted in 1972, which sets the framework for the imposition of industrial wastewater control programs on municipalities and the regulation of industrial users. CWA Sections 307(b)(c) sets forth the authority for the US EPA to est pretreatment standards for existing and new sources discharging industrial wastewater to publicly owned treatment works (POTWs) Composite Samples - A collection of individual samples obtained at regular intervals, based either on flow or time. (The individual samples are combined proportionally) Concentration Based Discharge Limits - Allowable concentration of a pollutant in wastewater discharges, usually expressed as a concentration (mg/L) in the discharge Confined Space - A space, which has limited openings for entry/exit, has unfavorable natural ventilation which could contain or produce dangerous air contaminants (or create an atmosphere of oxygen deprivation), and which is not intended for continuous employee occupations. A permit may be required under OSHA to enter a confined space Control Authority - The agency responsible for implementing a pretreatment program Conventional Pollutants - Those pollutants, which are usually found in domestic, commercial or industrial wastes ( such as suspended solids or biochemical oxygen demand) that POTWs are designed to treat Density - The relationship between weight and volume (ie g/cm3 or lbs/gal) Detention Times - The resident time of wastewater undergoing treatment in a treatment unit such as a clarifier or tank. Min detention times are required for settling, chemical treatment, and biological treatment Doppler flow meter - a device that measures the velocity of a liquid by measuring the change in frequency between a wave source and the meter Electroplating - The process of applying a thin metal coating to the surface of a substrate by electrodeposition of dissolved metal in a plating solution Flow Equalization - Temporary storage of wastewater flow to provide a more uniform flow or waste characteristics for treatment or discharge Flume - A specially shaped open channel flow section with an area and/or slope that is different from that of the channel Grab sample - a sample, which is taken from a wastestream without the regard to the flow in the wastestream, and over a period of time not to exceed 15 minutes Holding time - the maximum time allowed between when a sample is taken and when it must be analyzed in the laboratory, in accordance with standard preservation, storage and analytical procedures Dissolved Sulfide (H2S) - produced by the biological reduction of sulfate and organic matter under anaerobic (oxygen-free) conditions. Dissolved sulfide can combine with hydrogen to form hydrogen sulfide gas. H2S gas is potentially hazardous to sewer maintenance workers Industrial User (IU) - Any non-domestic source, which introduces pollutants into a POTW