The following LSPA compliance tip was presented at the March 2021 Membership Meeting, which was held virtually through the Zoom webinar platform, on March 16, 2021.
The four criteria for a Tier I site are related to IRA conditions, and a Tier I site cannot be initially classified or reclassified as Tier II until the IRA condition has been resolved and an IRA Completion Statement has been filed. If a site meets at least one of these criteria it must be classified as Tier I: evidence of groundwater contamination with OHM at concentrations equal to or exceeding the applicable RCGW-1 Reportable Concentration at a location within an Interim Wellhead Protection Area or Zone II, or within 500 feet of a Private Water Supply Well; 2) an Imminent Hazard is present; 3) one or more remedial actions are required as part of an IRA pursuant to 310 CMR 40.0414(2); or 4) an IRA is necessary to eliminate or mitigate a Critical Exposure Pathway pursuant to 310 CMR 40.0414(3).
310 CMR 40.0520(2) and (3)
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