CWEA Collection Systems Maintenance

CWEA Collection Systems Maintenance Why are gasoline and volatile solvents objectionable when present in a sewer? - ANS They produce an explosion hazard You should never attempt to install, maintain, repair or replace electrical equipment panels, controls, wiring or circuits unless - ANS You know what you are doing, are qualified and are authorized What are the different areas of traffic zones? - ANS Advance Warning Area, Transition Area, Activity Area (buffer space and work space), Termination Area. Could be 4 or 5, justify your answer on the test! why should hydrogen sulfide be controlled? - ANS to protect from corrosion and odors Personnel entering a Permit Required Confined Space must have the following training - ANS entry and rescue To find protective gear before application of a product, you should: - ANS look at the MSDS The gas most commonly associated with septic wastewater is - ANS Hydrogen Sulfide The lack of an unpleasant odor in a manhole, lift station or other structures does not always mean that dangerous gasses are not present because: - ANS some dangerous gasses are odorless (for example, carbon monoxide) What are the four conditions necessary to create an explosion? - ANS combustible gas, adequate oxygen, heat and proper mixing of gas and oxygen What does the "transition area" mean in traffic control? - ANS It moves traffic out of its normal path What elements should be considered to improve worker safety in High speed Temporary Traffic control Zones? - ANS Rerouting traffic around the work site, positioning of law enforcement officers in the temporary traffic control zone, and work zone training What key features would you need to address when developing an S.O.P. for a Lift Station failure? - ANS Traffic Control Plan, By-Pass connections, and Spill containment What tools are used with a power rodder? - ANS Spring Blades Tools used for sewer rodding include: - ANS porcupine, root saw, square bar cork screw What tool would you use to cut a VCP pipe? - ANS Chain Pipe Cutter Which conditions should a gas detection device test for? - ANS Hydrogen sulfide, explosive/flammable gasses, oxygen What does "LEL" mean on a gas detection meter? - ANS Lower Explosive Limit The oxygen level alarm normally goes off if oxygen levels are below: - ANS 19.5 percent When developing an S.O.P. for scheduled maintenance of electrical equipment, what program should be addressed as a primary safety guideline? - ANS The L.O.T.O Program What does L.O.T.O. Stand for? - ANS Lock out tag out What document would you require to be referenced when developing an S.O.p. for