Q: Does the subcontractor needs to be a certified firm if he does not disturb any paint?

Firms performing tasks that disturb no painted surfaces whatsoever do not need to be certified.  However, since conditions at the job site may be difficult to predict, EPA strongly recommends...

Firms performing tasks that disturb no painted surfaces whatsoever do not need to be certified.  However, since conditions at the job site may be difficult to predict, EPA strongly recommends that all firms involved in the renovation be certified and use properly trained and certified personnel.  For example, a firm hired to install an HVAC system after demolition of painted surfaces has taken place may find that to complete the job painted surfaces need to be disturbed. The HVAC firm may not engage in activities that disturb painted surfaces if it is not certified.   

As every renovation job is different, it is up to the firm acting as the general contractor to determine what activities are within the scope of the renovation and to ensure that other firms are properly trained and certified for the tasks they will be performing.  All firms, including the firm acting as the general contractor, are responsible for making sure the renovation is performed in accordance with the work practice standards, including keeping containment intact and making sure lead dust and debris do not leave the worksite.   General contractors should keep in mind that if a firm hires a subcontractor that fails to follow the work practice standards or otherwise violates the RRP rule, the firm that hired the subcontractor is also responsible for the violation.