SECTION 1.  Chapter 21E, Section 2 of the General Laws, as appearing in the most recent edition, is hereby amended by inserting the following new definition following the definition of indicia of ownership primarily to protect a security interest:

“No Significant Risk,” a condition in which the concentration of each identified substance of concern at a site or in the surrounding environment is such that the substances of concern do not present a significant risk of harm to health, safety, public welfare, or the environment during any foreseeable period of time.  A condition of No Significant Risk may be achieved through the imposition of institutional controls constraining future site uses.

SECTION 2.  Chapter 21E, Section 2 of the General Laws, as appearing in the most recent edition, is hereby amended by inserting the following new definition following the definition of owner or operator:

"Permanent solution," assessments or response actions which demonstrate that a condition of no significant risk exists at a disposal site.  If a condition of No Significant Risk has been attained, the ongoing operation of an active remedial system whose purpose is to mitigate vapor intrusion shall not prevent the attainment of a Permanent Solution

SECTION 3.  Said Chapter 21E, Section 3A is further amended in Subsection (g) by deleting the first sentence of the third paragraph.

SECTION 4.  Within ninety (90) days of the effective date of said amendment, the Department shall promulgate regulations revising the definitions of No Significant Risk and Permanent Solution currently found at 310 CMR 40.0006 to be consistent with these definitions.