A: In 2006, the EPD issued an interpretaion of NPDES regulations. The interpretaton applied the regulations fo rthe 8 hour NPDES course and exam not only to the Prime Contractor (the NPDES Permittee) but to "all persons involved in land disturbing activities on the site" which included plumbers, electricians, and others onsite but under contract with the prime contractor. HB463 was passed in 2006 to require that subcontractors involved in land disturbance activity were required to attend an awareness course on NPDES not to exceed 2 hours in duration, no test required no later than December 31, 2007. The bill also clarified that only one certified permittee was required to be onsite when land disturbance activity is taking place on the site.