Illinois Administrative Code › Title 35 - ENVIRONMENTAL PROTECTION › Part 740 - SITE REMEDIATION PROGRAM › Subpart D - SITE INVESTIGATIONS, DETERMINATION OF REMEDIATION OBJECTIVES, PREPARATION OF PLANS AND REPORTS › Section 740.435 - Site Investigation Report - Focused Site Investigation

Current through Register Vol. 48, No. 28, July 12, 2024
a) Data and results
				from the focused site investigation shall be combined into one Site
				Investigation Report.
b) A Site
				Investigation Report for the focused site investigation shall include the
				results and methodologies of the investigation performed pursuant to Section
				740.430
				of this Part and the following chapters:
1)
				Executive summary. This chapter shall identify the objectives of the site
				investigation and the technical approach utilized to meet such objectives. It
				shall state the recognized environmental conditions and related contaminants of
				concern specified by the RA and the data limitations in the
				assessment;
2) Site description.
A) If a phase I environmental site assessment
				has been completed in accordance with Section
				740.420(a)
				of this Part, then the results may be submitted in accordance with Section
				740.425
				of this Part;
B) This subchapter
				shall state the method used for the evaluation of the remediation site and
				areas immediately adjacent to the remediation site and document the
				observations obtained (e.g., grid patterns or other systematic approaches used
				for large properties). It shall describe the regional location, pertinent
				boundary features, general facility physiography, geology, hydrogeology, and
				current and post-remediation uses of the remediation site and areas immediately
				adjacent to the remediation site;
C) Site base map(s) meeting the requirements
				of Section
				740.210(a)(7)
				 and including the following:
i) The sources or potential sources of the
				contaminants of concern, spill areas, and other suspected areas for the
				specified contaminants of concern;
ii) On-site and off-site injection and
				withdrawal wells; and
iii) All
				buildings, tanks, piles, utilities, paved areas, easements, rights-of-way and
				other features, including all known past and current product and waste
				underground tanks or piping;
D) A legal description or reference to a plat
				showing the boundaries of the remediation site, or, for a Federal Landholding
				Entity, a common address, notations in any available facility master land use
				plan, site specific GIS or GPS coordinates, plat maps, or any other means that
				identifies the site in question with particularity;
3) Enforcement or response actions. This
				chapter shall include the following information as relevant to the recognized
				environmental conditions:
A) A summary of
				environmental enforcement actions for the remediation site and areas
				immediately adjacent to the remediation site and their subsequent
				responses;
B) Any previous response
				actions conducted by either local, State, federal or private parties at those
				sites; and
C) A list of documents
				and studies prepared for those sites;
4) Site-specific sampling plan. This chapter
				shall indicate those applicable physical and chemical methods utilized for
				contaminant source investigations, soil and sediment investigations,
				hydrogeological investigations, surface water investigations, and potential
				receptor investigations;
5)
				Documentation of field activities. This chapter shall include the results of
				the field activities to determine physical characteristics. At a minimum, this
				chapter shall include the following elements:
A) Narrative description of the field
				activities conducted during the investigation;
B) The quality assurance project plan
				utilized to document all monitoring procedures (e.g., sampling, field
				measurements and sample analysis) performed during the investigation, so as to
				ensure that all information, data and resulting decisions are technically
				sound, statistically valid, and properly documented; and
C) Presentation of the data in an appropriate
				format (e.g., tabular and graphical displays) such that all information is
				organized and presented logically and that relationships between the different
				investigations for each medium are apparent;
6) Endangerment assessment. This chapter
				shall analyze the results of the field activities and characterize the extent
				of contamination (qualitative and quantitative) for contaminants of concern
				related to the recognized environmental conditions and compare the site
				information with the applicable provisions of 35 Ill. Adm. Code 742. This
				chapter shall:
A) Describe any recognized
				environmental conditions, evaluate exposure routes, including threatened
				releases, and evaluate exposure routes excluded under 35 Ill. Adm. Code
				742;
B) Describe the nature,
				concentration and extent of contaminants of concern within all environmental
				media at the remediation site and assess the observed and potential contaminant
				fate and transport;
C) Describe the
				significant physical features of the remediation site and vicinity that may
				affect contaminant transport and risk to human health, safety and the
				environment; and
D) Compare the
				concentrations of the contaminants of concern with the corresponding Tier 1
				remediation objectives under 35 Ill. Adm. Code 742;
7) Conclusion. This chapter shall assess the
				sufficiency of the data in the report and recommend future steps;
8) Appendices. Supporting documentation,
				references and data sources, including, but not limited to, field logs, well
				logs, and reports of laboratory analyses, shall be incorporated into the
				appendices with reports containing laboratory analyses of samples collected on
				or after January 1, 2003, including the following:
A) Accreditation status of the laboratory
				performing the quantitative analyses;
B) Certification by an authorized agent of
				the laboratory that all analyses have been performed in accordance with the
				requirements of 35 Ill. Adm. Code 186 and the scope of accreditation;
				and
9) Licensed
				Professional Engineer affirmation in accordance with Section
				740.410
				of this Part.