The case studies presented in the document link below highlight the use of Total Petroleum Hydrocarbon (TPH) data for soil, soil vapor, groundwater, surface water and ambient air associated with the risk-based investigation, remediation and long-term management of petroleum releases. The case studies in large reflect current, HIDOH guidance and were prepared with input from multiple, outside state and federal regulators as well as private consultants and experts associated with the petroleum industry. The primary authors, Roger Brewer with the HIDOH and Manivannan (Mani) Nagaiah with Langan Engineering & Environmental Services, Inc., are also active members of the Interstate Technology & Regulatory Council (ITRC) (TPH Risk work group) and acknowledge important contributions to the document from many of the ITRC team members. The HDOH Case Studies will be referenced in the ITRC TPH Risk document for examples of the site-specific use of TPH data in a variety of petroleum-release scenarios (anticipated publication early 2019).
Click on the link below to download the most recent edition of the TPH Risk Case Studies document. Comments, edits and ideas are welcome and should be sent to Roger Brewer with the HEER Office (email@example.com). PowerPoint slides and links to recordings of a two-part webinar on the case studies will be posted to the HEER webinar web page.
Refer to Attachment 6 for a summary of updates to the document. The Case Studies document was updated in October 2018 to correct Conceptual Site Model figures in Case Study #1.
HIDOH, 2018. Collection and Use of Total Petroleum Hydrocarbon Data for the Risk-Based Evaluation of Petroleum Releases, Example Case Studies (October 2018): R. Brewer, M. Nagaiah and R. Keller, authors. Hawai´i Department of Health, Hazard Evaluation and Emergency Response Office. Honolulu, Hawaii.