Code of Massachusetts Regulations › 310 CMR - DEPARTMENT OF ENVIRONMENTAL PROTECTION › Title 310 CMR 40.0000 - Massachusetts Contingency Plan › Subpart H - COMPREHENSIVE RESPONSE ACTIONS › Section 40.0835 - Phase II Report

Current through Register 1525, July 5, 2024
(1) A Phase II
				Report shall be submitted to the Department at the conclusion of Comprehensive
				Site Assessment activities pursuant to the applicable deadlines set forth in
				310
				CMR 40.0550 or
				40.0560 or at Interim
				Deadlines specified by the Department.
(2) A Phase II Report shall present, contain,
				or append relevant information, data, findings, and Opinions related to the
				Comprehensive Site Assessment of the disposal site.
(3) A Phase II Report shall set forth in
				narrative and, to the extent possible, in maps, graphs, and tables, the
				disposal site Conceptual Site Model, approach, methods and results of the Phase
				II - Comprehensive Site Assessment.
(4) The information and assessment findings
				outlined in 310 CMR 40.0835(4) shall be provided in the Phase II Report.
				Depending upon specific site and release conditions, it may be necessary to
				provide additional information to adequately characterize the disposal site,
				consistent with the Response Action Performance Standard described in
				310
				CMR 40.0191, or it may be appropriate to
				forgo particular assessment or information gathering elements and provide
				Technical Justification as described in
				310
				CMR 40.0193.
(a) Disposal Site Name, Location and Locus
				Map, updated, if necessary, from what was provided in the Phase I
				Report;
(b) Detailed Disposal Site
				Map(s), updated, as necessary, from the base map(s) provided in the Phase I
				Report, and depicting all investigatory and sampling points relevant to the
				Comprehensive Site Assessment, the boundaries of the disposal site in plan
				view, and, as appropriate, the vertical extent of contamination at the disposal
				site;
(c) Disposal Site History,
				updated, supplemented, or modified if necessary from information provided in
				the Phase I Report;
(d) Site
				Hydrogeological Characteristics, including details of subsurface investigations
				conducted at the disposal site, together with a comprehensive description and
				depiction of site hydrogeologic conditions, including, without limitation:
1. a description of all relevant geologic,
				hydrologic, geophysical, and other subsurface investigations and assessments
				conducted at the disposal site;
2.
				documentation related to borings, well construction, and well development,
				including copies of well drilling logs, within or appended to the Phase II
				Report; and
3. a detailed
				characterization of geologic and hydrogeologic conditions at the disposal site,
				including:
a. groundwater potentiometric
				surface(s), gradients, flow rates, and flow direction(s);
b. soil type(s), stratigraphy, and
				permeability;
c. where appropriate,
				bedrock type and characteristics, depths and contours; and
d. an evaluation and description of the
				potential for flooding;
(e)
Environmental Fate and
				Transport of Oil and/or Hazardous Material
, including, as
				appropriate:
1. an evaluation of the
				environmental fate and transport characteristics of the oil and/or hazardous
				material identified at the disposal site, including, without limitation,
				mobility, stability, volatility, persistence and bioaccumulative potential of
				the oil and/or hazardous material;
2. identification and characterization of
				existing and potential migration pathways of the oil and/or hazardous material
				at and from the disposal site, including, as appropriate, air, soil,
				groundwater, soil gas, preferential migration pathways such as subsurface
				utility lines and other subsurface void spaces, surface water, sediment, and
				food chain pathways; and
3. an
				evaluation of the potential for soil, groundwater, or NAPL to be a source of
				vapors of oil and/or hazardous material to indoor air of occupied structures as
				described in
				310
				CMR 40.0900;
(f) Nature and Extent of Contamination,
				including a characterization of the nature, and vertical and horizontal extent
				of oil and/or hazardous material in the environment, including any and all
				source(s), the presence, distribution, and stability of any NAPL, tabulation of
				analytical testing results, and, where appropriate, a characterization of
				background concentrations of oil and/or hazardous material at the disposal
				site;
(g) Exposure Assessment,
				including the identification and characterization of all potential human and
				environmental receptors that could be impacted by oil and/or hazardous material
				at or migrating from the disposal site, and, as appropriate, the quantification
				of exposure of oil and/or hazardous material to these receptors, including
				justification for the sampling approach and the Exposure Point Concentration
				calculation, under current and reasonably foreseeable site conditions, as
				described in
				310
				CMR 40.0900;
(h) Risk Characterization, as set forth in
				310
				CMR 40.0900, for all appropriate human and
				environmental receptors identified at and near the disposal site; and
(i) Conclusions, including a summary of the
				Phase II Comprehensive Site Assessment findings. The Conclusions section shall
				provide the disposal site Conceptual Site Model, the reasoning and results used
				to support the findings, and indicate and support the outcome of the Phase II
				Investigation as described in
				310
				CMR 40.0840.