Storm water systems underground piping

Tanks and Appurtenances Used to Contain Hazard Substances Including Aboveground Tanks, Underground Tanks, Piping and Appurtenances, and Storm Water Management Systems Associated witb Containment Systems... 

A failure in a pressurized water system will not have nearly the same results as piping systems for flammable or toxic materials. Storm and sanitary systems depend on gravity to move the contents. Leaks may contaminate underground water sources and leaking material may leach to the surface or into water supplies and create health hazards. 

The initial layout of any oily or storm water underground piping system usually takes place after the preliminary plot plan is generated. Even though some equipment locations may be tentative, the plant layout designer can begin to spot the oily water and storm water mains, locate sewer boxes, and establish the invert elevation of these systems at each end of the unit. 

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