(a) A person who is engaged in the business of remediation contractor under this article is not responsible for a release or threatened release of contaminants at the site described in the voluntary remediation agreement for work properly performed pursuant to the agreement.

(b) A person who is engaged in the business of remediation contractor under this article is not liable for any harm, damage or injury caused by a release of a contaminant which occurred prior to the contractor undertaking work at the site.

(c) Limitation of liability, pursuant to subsections (a) and (b) of this section does not apply to a release or threatened release of contaminants at the site described in the voluntary remediation agreement that is directly caused by an act or omission which constitutes gross negligence or by the willful misconduct of the remediation contractor.

(d) A remediation contractor is not required to obtain a permit for remediation activities, if a permit is required under article five, eleven, fifteen or eighteen of this chapter. However, an owner or operator of the site to be remediated is not relieved of the permit requirements, if any, for remediation activities undertaken at the site. A remediation contractor must comply with all applicable state and federal laws in the transportation, treatment, storage and disposal of contaminants generated as a consequence of the remediation activities.

(e) A remediation contractor is not a "generator" for the purposes of the generator assessments imposed pursuant to article twenty of this chapter.