DOH Releases Validated Result of Aliamanu Military Reservation System Flush in December
Posted on January 14, 2022 in Navy Water System Incident, Newsroom
HONOLULU- The Hawaii Department of Health (DOH) released the results of a US Navy test in December that indicated failure to meet DOH incident-specific criteria. Therefore, a second cycle of flushing of the system was carried out in zone H2 of the drinking water distribution system restoration plan, which is part of the Aliamanu military reserve. The data has been validated by a third party.
A sample taken from the H2 area detected total petroleum hydrocarbons – diesel range (TPH-d) at 620 parts per billion (ug/L). The DOH requires TPH results for this emergency response to drop to 200 parts per billion or less, which is the level considered undetected, in order to proceed to the next step in the flushing process.
Click here to download the lab report. The overrun can be viewed on page 8.
The sample was taken by the Navy on December 26 after the initial flushing of the water distribution system in area H2. Upon receipt of data indicating that the sample tested positive for diesel range organics above the DOH incident-specific parameter, the Drinking Water System Interagency Team made the decision flush the system again according to its sampling plan. In addition to the DOH, members of the Drinking Water System Interagency Team include the United States Navy, United States Army, and United States Environmental Protection Agency.
The H2 zone was then rinsed and sampling is currently underway. New samples should meet specific DOH incident criteria before flushing and sampling of individual homes and buildings can begin.
The Navy laboratory tested both types of analytes: total petroleum hydrocarbons (TPH) and volatile organic compounds (VOCs).
Drinking Water Sample Results for Total Petroleum Hydrocarbons (TPH)
Petroleum hydrocarbons are measured by length in 3 categories: Total Petroleum Hydrocarbons – Gasoline Range (TPH-g), Total Petroleum Hydrocarbons – Diesel Range (TPH-d) and Total Petroleum Hydrocarbons – Petroleum Range (TPH-o). For more information on TPH, please see the What Are Petroleum Hydrocarbons fact sheet.
TPH results reflect the amount of petroleum hydrocarbons in drinking water at the time of sampling.
The DOH has defined Project TPH screening levels for this incident as undetected at less than or equal to 200 parts per billion.
Drinking Water Sample Results for Volatile Organic Compounds (VOCs)
VOC are carbon-based compounds that easily evaporate into the air. Fuels and other petroleum products contain varying amounts of VOCs.
For more information on VOCs: https://www.epa.gov/air-emissions-inventories/what-definition-voc
PDF: DOH Releases Validated Result of Aliamanu Military Reservation System Flush in December