Placement of Sites on State Master List. The Department may place a site on the State Master List if the Department has reason to believe that a hazardous substance has been or may be released at a site or if the Department has been notified that hazardous substances may be present. If a site is placed on the State Master List a State site assessment may be conducted. Inclusion of a site on the State Master List does not constitute a final decision that response action is necessary. The State site assessment is an initial evaluation of a release or potential release. This evaluation may include a site visit, records search, sampling, and subsurface borings. The Department may use assessments and investigations conducted pursuant to the National Contingency Plan, and information collected by federal, State, or local governments pursuant to other enforcement activities, investigations, or responses. The information gathered during a State site assessment may include: Site history and nature of waste handling; Description of known contaminants and their pathways of migration; Identification of human and environmental targets; Recommendation on whether further action is warranted; and Other information relevant to the source, any potential health or environmental impacts, and responsible persons. After a State site assessment, the Department may indicate that no further remedial action is planned for a site based upon the available information. Further Response Action. If a site is to be considered for further response action, the Department: Shall report the results to the chief health or environment officer of the county in which the site is located; and May proceed in accordance with Regulation .04, .05, or .06 of this chapter.