Cleanup Activities
There are no current cleanup activities.
Cleanup/Treatment Implemented:
N
Cleanup/Treatement Categories:
Addl Cleanup/Treatment info:
On April 8, 2024, PM collected two surface water samples (SW-1 and SW-2), two seep water samples (SP 1 and SP-2), and four sediment samples (SED-1 through SED-4) to assess the REC identified in PM's Phase I ESA. The samples were submitted for laboratory analysis of volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), and 13-Priority Pollutant List (PPL) metals (antimony, arsenic, beryllium, cadmium, chromium, copper, lead, mercury, nickel, selenium, silver, thallium, and zinc). Based on the sheen, foam, and discoloration of the seep water, the surface water and seep water samples were further analyzed for iron and manganese to investigate the potential for naturally occurring impacts.
No VOCs or SVOCs were identified in the sediment samples analyzed from the subject property at concentrations above the laboratory method detection limits (MDLs) or reporting limits (RLs) and/or applicable screening criteria. Arsenic was detected above the EPA Regional Screening Level (RSL) for residential soils and the Mississippi Department of Environmental Quality (MDEQ) Tier 1 Target Remediation Goal (TRG) for unrestricted soil in all sediment samples submitted for analysis; however, the concentrations and distribution of arsenic across the subject property suggest that the detected concentrations are consistent with background arsenic concentrations, and not as a result of contamination from a release that may have impacted the subject property.
No VOCs, SVOCs, or metals were detected in the seep and surface water samples analyzed at concentrations exceeding the laboratory RLs and/or the applicable screening criteria with the exception of manganese and 1-methylnaphthalene in seep water sample SP-2.
Seep water sample SP-1 exhibited elevated concentrations of iron, and sample SP-2 exhibited elevated concentrations of both iron and manganese. It is the opinion of PM that the discoloration and physical properties of the observed seep water at the subject property are a result of naturally elevated iron and manganese levels along with the presence of iron-oxidizing bacteria.
There is no known significant on- or off-site source for 1-methylnaphthalene in SP-2 based on historical research completed for the site and adjoining properties during the Phase I ESA. It is likely that the source of the 1-methylnaphthalene in SP-2 is an incidental release from a combustion source at the surface. It is noted that 1-methylnaphthalene was not detected in SP 1, or the surface water samples collected at the subject property. Furthermore, drinking water is supplied to the site via piped water from the local utility and no potable water wells were identified on the site; therefore, exposure to groundwater is not a complete pathway at the subject property. Based on this information and the apparent localized nature of the constituent, it does not appear that the presence of 1-methylnaphthalene in SP-2 presents an unacceptable risk for future receptors on the subject property.
The REC associated with the subject property identified in PM's October 2023 Phase I ESA has been adequately assessed. Based on the current use and identified exposure pathways at the subject property, no further investigation is warranted.
Address of Data Source:
Total ACRES Cleaned Up: 73
Number of Cleanup Jobs Leveraged:
EPA Cleanup Funding:
Leveraged Funding:
Cost Share Funding:
Total Funding:
Top of Page