309 CMR 4.02
Professional Competency
(1) In providing Professional Services, a licensed site professional shall act with reasonable care
and diligence, and apply the knowledge and skill ordinarily exercised by licensed site
professionals in good standing practicing in the Commonwealth at the time the services are
performed.
(2) An LSP shall not provide Professional Services outside the LSP’s areas of professional
competency, where this competency is based on the LSP’s education, training, and experience,
unless that LSP has relied upon the technical assistance of one or more professionals whom the
LSP has reasonably determined are qualified in such area or areas by education, training and
experience.
(3) In providing Professional Services, a LSP may rely in part upon the advice of one or more
professionals whom the LSP reasonably determines are qualified by education, training and
experience.
(4) A successor hazardous waste site cleanup professional may render a waste site cleanup
activity opinion regarding response actions performed under a previous hazardous waste site
cleanup professional, and that opinion may be relied upon as sufficient to protect public health,
safety, welfare, or the environment, only when the successor hazardous waste site cleanup
professional has:
(a) reviewed all reasonably available documentation known to the successor hazardous
waste site cleanup professional that describes previous releases, site assessment activities and
results, and work performed in connection with the assessment, containment or removal
action that is the subject of the opinion;
(b) conducted a site visit to observe current conditions and to verify the completion of as
much of the work as is reasonably observable; and
(c) concluded, in the exercise of the successor hazardous waste site cleanup professional's
independent professional judgment, that the successor hazardous waste site cleanup
professional has sufficient information upon which to render the waste site cleanup activity
opinion.
(Mass. Register #1566, 01/30/2026)