Texas Wastewater A questions with correct answers

What is TCEQ doing to control "point source" pollution of the Texas waterways? CORRECT ANSWER-*Permitting of domestic wastewater plants *Permitting of industrial wastewater plants Describe proper design of force main wastewater lines. CORRECT ANSWER-Minimum two fps velocity with the smallest pump operating alone. Minimum four inch diameter pipe with 150 psi rating. What is Standard Dimension Ratio? CORRECT ANSWER-Ratio of outside pipe diameter (OD) to wall thickness (PVC) Describe proper design of gravity wastewater lines. CORRECT ANSWER-Designed to flow half full ,under normal conditions, at a minimum of two fps and a maximum of ten fps. Manholes should have a minimum opening of? CORRECT ANSWER-24 inches and be at least 4 feet wide. pH meters should be calibrated how often? What standards should be used for calibration purposes? CORRECT ANSWER-Daily with at least two buffers. What is the standard chlorine residual and minimum c