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CWEA Environmental Compliance Exam 2025 Questions and Answers An industry operating an 8-hour shift, 5 days per week, generates 100,000 gallons of wastewater per shift. Their pretreatment system has a capacity of 150 gallons per minute. How long must the pretreatment facility operate to process the wastewater generated each day? - --Answer --11.1 hours An industry has five sewer connections with the following discharge rates: 1) 300 gpd, 2) 75 gpd, 3) 725 gpd, 4) 1,200 gpd, 5) 200 gpd A flow-weighted composite sample of 5 liters is desired. How many milliliters of sample from each connection should be composited? - --Answer --600, 150, 1450, 2400, 400 Prohibited discharges from industrial users to POTWs, as stipulated in the Clean Water Act, are pollutants that: - --Answer --create a fire or explosion hazard in the sewer or POTW. "MSDS" is an acronym for what? - --Answer --Material Safety Data Sheet Safety hazards associated with hydrogen sulfide in sewer systems include: - -Answer --toxic gasses. ....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1