Pennsylvania Code › Title 25 - ENVIRONMENTAL PROTECTION › Part I - Department of Environmental Protection › Subpart D - Environmental Health and Safety › Article VI - General Health and Safety › Chapter 245 - ADMINISTRATION OF THE STORAGE TANK AND SPILL PREVENTION PROGRAM › Subchapter D - CORRECTIVE ACTION PROCESS FOR OWNERS AND OPERATORS OF STORAGE TANKS AND STORAGE TANK FACILITIES AND OTHER RESPONSIBLE PARTIES › Section 245.310 - Site characterization report

Current through Register Vol. 54, No. 28, July 13, 2024
(a) A responsible party shall prepare and
						submit to the Department within 180 days of reporting a release under §
												245.305(a)
						(relating to reporting releases), or within an alternative time frame as
						determined by the Department, a site characterization report which describes
						the activities undertaken in accordance with §
												245.309 (relating to site
						characterization). The responsible party shall submit two copies of the site
						characterization report to the Department unless directed otherwise. The site
						characterization report shall be complete and concisely organized and shall
						contain the following elements, as necessary, based on the nature, extent,
						type, volume or complexity of the release:
(1) A narrative description of the site and
						the historical and current operations conducted at the site.
(2) A site map showing location of buildings,
						roads, storage tanks, including those removed from service or closed in place,
						utilities, property boundaries, topographic contours, potential receptors and
						other information pertinent to the site characterization.
(3) A description of natural and manmade
						features pertinent to the site characterization.
(4) Details of interim remedial actions
						conducted at the site in accordance with §
													245.306 (relating to interim
						remedial actions). These details must include the following, as necessary:
(i) A description of the type and volume of
						the regulated substance removed from the storage tank.
(ii) A discussion of fire, explosion and
						safety hazards which have been identified, mitigated and monitored.
(iii) A discussion of necessary relocation of
						affected residents.
(iv) Where free
						product recovery is performed, a description of:
(A) The regulated substance released, the
						thickness of free product in wells, boreholes or excavations, and the
						properties and vertical and horizontal distribution of any free product
						remaining in the subsurface.
(B)
						The type of free product recovery system used.
(C) Whether a discharge has or will take
						place during the recovery operation, and where this discharge is or will be
						located.
(D) The type of treatment
						applied to, and the effluent quality expected from, a discharge.
(E) The steps that have been or are being
						taken to obtain necessary permits or approvals for a discharge.
(F) The volume and disposition of the
						recovered free product.
(G) The
						date free product recovery was initiated.
(H) The date free product recovery was
						completed.
(v) Where
						excavation of contaminated soil is performed, a description of:
(A) The regulated substance released and
						actual volume of soil excavated.
(B) The method used to determine the
						existence and extent of contaminated soil.
(C) The treatment method or disposition of
						the excavated soil, including receipts documenting acceptance of the material
						at a permitted treatment or disposal facility.
(D) The date excavation was
						initiated.
(E) The date excavation
						was completed.
(F) The rationale
						for terminating soil excavation where the contaminated soil has not been
						excavated, including the volume of contaminated soil remaining in place, and a
						description of what steps will be taken to address the soils that remain
						unexcavated.
(5) Details of actions conducted at the site
						in accordance with §
													245.307 (relating to affected or
						diminished water supplies). These details must include the steps that have been
						or are being taken to restore or replace affected or diminished water
						supplies.
(6) A description of the
						type and characteristics of regulated substances involved, including
						quantities, physical state, concentrations, toxicity, propensity to
						bioaccumulate, persistence and mobility.
(7) The results of tightness testing or other
						release detection method used or conducted to determine the structural
						integrity of the storage tank systems.
(8) The details of removal from service
						activities conducted at the site.
(9) The identification of the sources of
						contamination, including the actual or estimated date and quantity of release
						from each source.
(10) The location
						and description of affected water supplies and water supplies with the
						potential to be affected.
(11) A
						statement certifying that the site-specific plan, prepared for worker health
						and safety in accordance with OSHA requirements in
						29 CFR
						1910.120 (relating to hazardous waste
						operations and emergency response), including health and safety policies,
						medical monitoring, training and refresher courses, emergency and
						decontamination procedures, personal protective equipment and standard work
						practices, was implemented.
(12) A
						discussion and analysis to demonstrate that the site characterization
						objectives in § 245.309(b) have been satisfied.
(13) The rationale, equipment, methodology
						and results of geophysical surveys.
(14) The location, rationale and logs of soil
						borings.
(15) The location,
						rationale, construction details, including methods and materials, and depth to
						groundwater of piezometers, well points and monitoring wells.
(16) Groundwater contour maps depicting
						groundwater flow direction at the site.
(17) A description of methods and equipment
						used to determine site-specific soil, geologic, hydrogeologic and aquifer
						properties.
(18) Sampling locations
						and rationale for selection of these locations.
(19) The results of a survey used to identify
						and sample public and private wells.
(20) Parameters analyzed for, analytical
						methods used and detection limits of these methods.
(21) Field and laboratory analytical results
						and interpretations.
(22)
						Contaminant distribution maps in the media and contaminant phases.
(23) A conceptual site model which describes
						the sources of contamination, the fate and transport of contaminants, actual
						and potential receptors, and evaluates the vapor intrusion pathway.
(24) The disposition of site characterization
						wastes.
(25) A copy of
						site-specific plans prepared and implemented for the provision of the
						following:
(i) The identification, management
						and disposition of solid, hazardous, residual and other wastes generated as
						part of the site characterization.
(ii) The data quality objectives and quality
						assurance/quality control program for the performance of site characterization
						field activities and for the accurate collection, storage, retrieval,
						reduction, analysis and interpretation of site characterization data.
(26) The identification of the
						remediation standard which has or will be attained at the site.
(27) The Department's written determination
						that groundwater is not used or currently planned to be used, if needed to
						attain the remediation standard selected or to be selected.
(28) The impacts to ecological receptors as a
						result of the evaluation conducted in accordance with §
													250.311 or §
													250.402(d)
						(relating to evaluation of ecological receptors; and human health and
						environmental protection goals).
(29) The impacts to surface water as a result
						of the evaluation conducted in accordance with §
													250.309 or §
													250.406 (relating to MSCs for
						surface water; and relationship to surface water quality
						requirements).
(30) A summary of
						the remedial action option that will be used at the site to attain the selected
						remediation standard. The summary must include a description of the components
						of each option, a conceptual design and a description of any additional
						investigation needed to complete the design of each option.
(31) A risk assessment report in accordance
						with §
													250.409 (relating to risk
						assessment report).
(32) A
						demonstration that no current or future exposure pathways exist following the
						procedures described in §
													250.404 (relating to pathway
						identification and elimination).
(33) A report of additional tasks performed
						to meet the objectives in § 245.309(b).