Cwea Environmental Compliance Exam Questions And Answers

34. What types of errors can be minimized by a QA program? {Ans: Improper sampling methodology, Lack of adequate mixing during compositing, and Poor sample preservation}Pretreatment inspectors with proper credentials are authorized by _______ to enter any premises of an industrial discharger for the purposes of inspection, sampling, examination of records required to be kept by the POTW, and to set up devises necessary to conduct sampling, monitoring and metering operations. {Ans: Local sewer-use ordinances}15. What is the most heavily used toxic pollutant in leather tanning? {Ans: Chromium}15. What is the purpose of a bubbler? {Ans: Measure depth of water weir.}An industry has five sewer connections with the following discharge rates: 1) 300 gpd, 2) 75 gpd, 3) 725 gpd, 4)1,200gpd, 5) 200 gpd. A flow-weighted composite sample of 5 liters is desired. How many milliliters of sample from each connection should be composited? {Ans: 600, 150, 1450, 2400, 400}Low pH wstewater is neutralized by adding: {Ans: NaOH.}