piping run with pipe meeting the new performance standards?
No, you do not have to replace the entire piping run so long as you replace no more than two feet of piping outside the footprint of the containment sump. Metal components may not be used to connect spliced piping to existing piping unless they are placed in a monitored containment sump. All other piping replacements or repairs will require that the entire piping run be replaced with pipe meeting the new performance standards.