89-01 Astoria Blvd, Queens, NY 11369

East Elmhurst

brownfield, CVOCs, VOCs, "Vapor Intrusion"

Astoria Holding Group, LLC
Site Description[1] 
Location: The site is located at 89-01 Astoria Boulevard in an urban area in the borough of Queens in New York City, NY. It is located at the northeast corner of the intersection of Astoria Boulevard and 89th Street in East Elmhurst, Queens. Site Features: The main site feature is a 2-story brick building with full basement. The site is approximately 5,200 square feet. Surrounding parcels are currently used for a combination of light commercial and residential. Current Zoning/Use(s): The site is zoned for residential and commercial use. The ground floor of the on-site building was used as ‘Party Zone’ and the second floor as residential. Ownership of the property changed in 2010. Currently the on-site building is used as both commercial and residential purposes. Surrounding parcels are used for a combination of commercial, residential and utility right-of-ways. The nearest residential areas are to the north and adjacent to the site along the east side of 89th Street. Historical uses: From approximately 1983 until at least March, 2004 the site was used as a dry cleaning facility. Past operations and practices appear to have led to the site contamination including leaks and spills from the former dry cleaning facility. Operable Units: Currently the site has one operable unit (OU1). On-site groundwater is contaminated with tetrachloroethylene (PCE), which was confirmed by limited subsurface investigations in 2006 and 2009. Elevated levels of PCE were also detected in indoor (basement) air in 2009. The Site Characterization, conducted during 2010, confirmed elevated levels of PCE in soil vapor samples collected adjacent to the site, and the dissolved phase PCE in groundwater migrating off-site. Site Geology and Hydrology: Site geology consists of mainly brown, medium, poorly graded sand with round gravel, rock fragments and some silt below 2 feet through 20 feet below grade. Based on the data from the recently conducted Site Characterization, the depth of groundwater varies from 9 to 22 feet below ground surface due to uneven topography. Groundwater flow direction is not consistent in one direction; groundwater elevation information from September 2010 and January 2011 indicates groundwater flow radially from the site.

Summary of Project Completion Dates
Projects associated with this site are listed in the Project Completion Dates table and are grouped by Operable Unit (OU). A site can be divided into a number of operable units depending on the complexity of the site and the number of issues associated with a site. Sites are often divided into operable units based on the media to be addressed (such as groundwater or contaminated soil), geographic area, or other factors.

Site Environmental Assessment
Nature and Extent of Contamination: Based upon investigations conducted to date, the primary contaminants of concern for on-site include tetrachloroethylene (PCE), Trichloroethylene (TCE), 1,2-Dichloroethylene and Naphthalene in groundwater. PCE and TCE were detected in shallow groundwater under the basement that ranges from 15 to 720 ppb and ND to 18 ppb respectively. PCE concentration in basement indoor air ranges from 28 to 650 µg/m3. A moderate amount of PCE and TCE from the site have migrated off-site. Highest concentrations for PCE and TCE were detected as 450 and 9.3 ppb in groundwater sample collected from southwest corner outside the property boundary. During the Site Characterization no samples were collected from on-site due to property access issues. Special Resources Impacted/Threatened: The site is located in the urban area and Fish and Wildlife Impact Analysis is not warranted. Significant Threat: The site presents a significant environmental threat due to the ongoing releases of contaminants from source areas into groundwater. Environmental sampling indicates soil vapor intrusion may be a concern for off-site structures.

Site Health Assessment
People are not drinking the contaminated groundwater because the area is served by a public water supply that is not affected by this contamination. Volatile organic compounds in the groundwater may move into the soil vapor (air spaces within the soil), which in turn may move into overlying buildings and affect the indoor air quality. This process, which is similar to the movement of radon gas from the subsurface into the indoor air of buildings, is referred to as soil vapor intrusion. Because the on-site building is vacant, the inhalation of site related contaminants due to soil vapor intrusion does not represent a current concern. Furthermore, environmental sampling indicates soil vapor intrusion may be a concern for off-site structures.

Contaminants of Concern
Type of Waste Quantity of Waste
TETRACHLOROETHYLENE (PCE) UNKNOWN
TRICHLOROETHENE (TCE) UNKNOWN
  1. DEC Environmental Site Remediation Database.  Site Name: "Former Drape Master".

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