HIGHWAY 18 GROUND WATER
Health & Environment
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The ground water plume with no identified source contains measured levels of PCE and TCE above background levels that were established within the Santa Rosa Aquifer (the aquifer being evaluated for the Ground Water Migration Pathway). Past soil sampling/analytical data did not identify the location of the source. PCE was detected in groundwater above the EPA maximum contaminant levels (MCL – the health based limits) of 5 ug/L in two Kermit PWS wells. The highest concentrations detected for the two wells, which were recorded in 2013, were 23 ug/L and 5.7 ug/L. All TCE detections were below the MCL of 5 ug/L.
When a contaminant is released from a large area such as an industrial plant or from a container such as a drum or bottle, it enters the environment. But such a release doesn’t always lead to exposure. One can only be exposed to a contaminant when one comes in contact with it. That contact and therefore that exposure can occur when you breathe, eat, or drink that contaminant, or when it touches your skin. Even if you're exposed to the contaminant, you might not be harmed. The effect of exposure to any chemical, including PCE or TCE, depends on several factors. Whether you are harmed will depend on such factors as the dose (how much), the duration (how long), and how you are exposed. Harm might depend on whether you've been exposed to any other chemicals, as well as your age, sex, diet, family traits, lifestyle, and state of health. Contaminants can enter soils and groundwater through a spill at the surface. PCE or TCE in soil or groundwater can evaporate and enter the indoor air of buildings; people who occupy or visit these building may then be exposed to these compounds in indoor air.
PCE is a colorless organic liquid with a mild, chloroform like odor. It is used primarily in the textile industry, and as a component of aerosol dry-cleaning products. Major releases of PCE to air and water are from dry cleaning and industrial metal cleaning or finishing. Water pollution can occur from PCE leaching from vinyl liners in some types of pipelines used for water distribution. TCE is a colorless or blue liquid with a chloroform-like odor. TCE is primarily used to remove grease from fabricated metal parts and in the production of some textiles. Wastewater from metal finishing, paint and ink formulation, electrical components, and rubber processing industries may also contain TCE. TCE can also be formed as a breakdown product of PCE.
EPA uses performance measures to track environmental results at Superfund sites. If you have any questions or concerns about the measures at this site, please contact the site team members listed under Site Contacts.
Read more about Superfund Remedial Performance Measures.
|Status at this
|What does this mean?|
|Human Exposure Under Control||Insufficient Data||Yes means assessments indicate that across the entire site:
No means an unsafe level of contamination has been detected at the site and a reasonable expectation exists that people could be exposed.Insufficient data means that, due to uncertainty regarding exposures, one cannot draw conclusions as to whether human exposures are controlled, typically because:
|Groundwater Migration Under Control||Insufficient Data||
Yes means EPA reviewed all information on known and reasonably expected groundwater contamination. EPA concluded the migration of contaminated groundwater is stabilized and there is no unacceptable discharge to surface water. EPA will conduct monitoring to confirm that affected groundwater remains in the original area of contamination.
No means EPA has reviewed all information on known and reasonably expected groundwater contamination, and the migration of contaminated groundwater is not stabilized.
Insufficient data means that due to uncertainty regarding contaminated groundwater migration, EPA cannot draw conclusions as to whether the migration of contaminated groundwater is stabilized.
Yes means the physical construction of the cleanup is complete for the entire site.
No means either physical construction is not complete or actions are still needed to address contamination.
|Sitewide Ready for Anticipated Use||No||Yes means:
No means that one or more of these three criteria have not been met. However, a site listed as no may still have redevelopment occurring on portions of the site and may be eligible for additional redevelopment.