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The State Cleanup Section administrates three (3) remedial programs:
The goals for the State Cleanup Section are to mitigate risk to human health and the environment through investigation, remediation, or institutional controls at sites. In addition, the Section is responsible for conducting both critical and non-time critical removal actions at sites where an imminent threat to public health and/or the environment exists.
In general, the State Cleanup Section addresses sites and properties contaminated with hazardous substances or petroleum hydrocarbons that do not qualify for inclusion on the US EPA Superfund National Priorities List or do not qualify to be managed by another IDEM Remediation Branch Section. The State Cleanup Section goal is to mitigate impacts and risks to human health and the environment by conducting site investigation, remediation and removal, or overseeing the party required to conduct site investigation and remediation and removal, at high priority sites. The State Cleanup Section utilizes the IDEM Risk Integrated System of Closure (RISC) as guidance on the process for properly investigating the nature and extent of contamination, and remediating hazardous substances and petroleum hydrocarbons. Information on the IDEM RISC guidance can be found on the RISC: Risk Integrated System of Closure page.
Sites are referred to the State Cleanup Section by the Emergency Response Section after notification of contaminant releases have been given to IDEM under the Indiana’s Spill Rule [PDF] or by the Site Investigation Section after completion of preliminary assessment for inclusion on the US EPA’s National Priorities List. Additionally, sites are referred to the State Cleanup Section by other branches or Offices within IDEM, the IDEM public complaint clearinghouse or from other public or local governmental agencies. Upon receiving the site referral the State Cleanup Section determines the priority ranking of the site based upon most recent site conditions and information. This priority ranking determination is used by the State Cleanup Section to properly allocate staff resources.
After further evaluation and consultation with the RISC TPH workgroup, IDEM has concluded that, effective June 14, 2010, routine TPH delineation in ground water is no longer warranted. Therefore, IDEM is discontinuing the default TPH closure level for ground water and TPH measurement in ground water will not normally be requested except to confirm the safety of municipal or private drinking water wells that are potentially affected by a petroleum release.
These TPH measurements will no longer be determined through Method 8015 analysis, but rather through the Washington Department of Ecology (WDOE) fractionation methodology which is the same method currently in use for ground water TPH fractionation. The results of this fractionation may be assessed through the revised version of the TPH Fractionation Calculator (version 1.3) as found on the IDEM RISC website on the RISC Toolbox page. The calculator is corrected to remove water solubility constraints, and reformatted to facilitate ease of use.
Affected sections of the RISC Technical Guide TPH Chapter and Appendices have been updated to reflect this change, including revisions to Table 8-3. Table 8-3 specifies whether the WDOE volatile petroleum hydrocarbon (VPH) or extractable petroleum hydrocarbon (EPH) analysis or both should be performed depending on the product type. See the RISC Technical Guide page 8-18 on the IDEM RISC website.
Please see the Announcement of Changes to Total Petroleum Hydrocarbon (TPH) Procedures for Ground Water [PDF] document for complete details.
The Total Petroleum Hydrocarbon (TPH) non-rule policy document is available in Chapter 8 of the RISC Technical Guide [PDF].