FARMINGDALE, NASSSU COUNTY, NEW YORK
BACKGROUND AND STATEMENT OF ISSUES
A. Site Description and History
The Circuitron Corporation site, which is on the National Priority List (NPL), is located in the Town of East Farmingdale, Suffolk County, New York (see Appendix A). The New York State Department of Health (NYS DOH) completed a preliminary health assessment for this site in April 1989, a public health assessment in February 1993 and a health consultation in October 1995. The assessments were prepared under a cooperative agreement with the Agency for Toxic Substances and Disease Registry (ATSDR).
The public health assessment and health consultation evaluate relevant environmental and health outcome data associated with a site and recommend measures to address public health concerns. The recommendations made in the public health assessment and health consultation for the Circuitron site are included in Appendix B of this report.
The purpose of this health consultation is to update information presented in the February 1993 public health assessment and October 1995 health consultation. This report discusses remedial activities which were performed since the previous health consultation, evaluates current site conditions and provides recommendations to address public health concerns.
The Circuitron site is an inactive circuit board manufacturing facility which operated between 1961 and 1986. Activities at the site have left soil and groundwater contaminated with metals and volatile organic compounds. Two Records of Decision (ROD) have been issued for the site. In 1991, a ROD was issued for Operable Unit (OU) 1 which consisted of a soil vapor extraction system, excavation of contaminated leaching pits, decontamination of the on-site building and new pavement. The OU2 ROD was issued in 1994 which required extraction of contaminated groundwater, treatment via air stripping and reinjection of the treated groundwater. Following the remedial design for OU1, a decision was made to further divide OU1 into Operable Units 1,3 and 4. Demolition of the on-site building was designated as OU1. OU3 consisted of excavation of leaching pits and OU4, the construction of a soil vapor extraction system.
Since the 1995 health consultation, the United States Environmental Protection Agency (US EPA) conducted a geoprobe study to delineate on-site volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs), demolished the on-site building, excavated contaminated soils and sediments at the site and prepared a final design report for a groundwater treatment system. Results of the geoprobe study were used to determine whether the soil vapor extraction portion of the site remediation plan, which is outlined in the OU4 ROD, was necessary and to define the limits of the soil excavation. Building demolition and the removal of contaminated sediment and soil were completed in January 1997. Following the demolition of the on-site building and soil excavation, the site was graded and rolled.
The NYS DOH reviewed the pre-final (90%) and final remedial design report for the groundwater treatment system prepared by the US EPA. This design detailed the specifications for a groundwater treatment system, as outlined in the OU2 ROD, which was also reviewed by the NYS DOH. As provided for in the OU2 ROD, remediation of the groundwater will include: extraction of the site-related groundwater contaminant plume; treatment of groundwater via metal precipitation and air stripping to meet drinking water standards; reinjection of the treated groundwater into the Upper Glacial Aquifer via an infiltration gallery; and disposal of treatment residuals at an approved facility.
B. Site Visit and Physical Hazards
The most recent NYS DOH site visit was may 14, 1998 by Ms. Wendy Kuehner. At that time, there were no physical hazards at the site. Site access was restricted by a fence that the US EPA constructed around the site in May 1992. Following the demolition of the on-site building and soil excavation, the site was graded and rolled.
The NYS DOH estimated from the 1990 Census that 5,510 people live within the water district boundaries. This population is 73.9% white and 20.4% black. The percent of persons of hispanic origin is 9.3%. 7.6% of the population is under 6 years of age, 22.6% is 6-19 years of age, 61.3% is 20-64 years of age, and 8.5% is 65 years or older. In 1990 there were 1,504 females of reproductive age (ages 15-44) in the area. The water district is located in census tracts 1223.01,1223.02 and 1232.01. The median household income in these tracts was $48,645 in 1989, with 3.9% of the population living below the poverty level.
The following chart compares these demographics with statewide averages.
|% Below Poverty Level||13.0%||3.9%|
D. Environmental Contamination and Exposure Pathways
Shallow on-site groundwater is contaminated with VOCs, primarily 1,1,1-trichloroethane (up to 4,600 micrograms per liter (ug/l)) and metals, primarily copper (up to 14,600 ug/l) and chromium (up to 788 ug/l) from the Circuitron site. The levels of contaminants detected in the groundwater in the shallow portion (upper 40 saturated feet) of the Upper Glacial Aquifer at the site pose an elevated risk to human health if exposure to site-related contaminants were to occur through drinking water. Generally, the shallow Upper Glacial Aquifer is not used as a source of public drinking water; however, remediation is warranted to protect the underlying Magothy aquifer from contamination. An active public drinking water supply well (East Farmingdale Gazza Boulevard well) that is approximately 300 meters downgradient of the site, draws water from the Magothy Aquifer, and has not shown any contamination to date. A shallow public drinking water supply well at this location was taken out of service in 1977 due to volatile organic compounds (trichloroethane, 110 ug/l and trichloroethene 85 ug/l) at levels which exceed NYS DOH drinking water standards. Two additional groundwater monitoring wells were installed in the Upper Glacial Aquifer downgradient of the site during the Focused Feasibility Study and are used to monitor groundwater contamination in the area. Groundwater samples from these wells have shown site related contamination (up to 520 ug/L 1,1,1,-trichloroethane) above NYS DOH drinking water standards since their installation in 1994. Elevated levels of volatile organic compounds have been detected in deep monitoring wells in the area. However, it was determined that this contamination is not attributable to the Circuitron Site. The public water supply wells downgradient of the site are monitored quarterly for site-related contaminants and will be taken out of service or be equipped with treatment systems if any contaminants are detected.