FDR Drive btwn East 116th & East 119th Streets, New York, NY 10035

East Harlem

Brownfield VOCs CVOCs "Vapor Intrusion" "Vapor Barrier"

Tiago Holdings, LLC
Site Description[1]
The site is about 4.5 acres in size located in East Harlem, is bounded by East 119th Street to the north, East 116th to the south, FDR Drive to the east, and adjoining non- BCP portions of East River Plaza and adjoining commercial and residential properties to the west.  The site is designated on the tax map of the Borough of Manhattan, New York as 517-544 East 116th Street, Block 1715, Lot 22, 539-555 East 117th Street and 512-522 East 118th Street, Block 1716, Lot 19, 527-549 East 118th Street, Block 1815, Lot 23, and 540-546 East 119th Street, Block 1815, Lot 31. The majority of the Site was developed prior to 1896 and was occupied prior to 1911 by the Washburn Wire Company, which was engaged in manufacturing of wire up until its closure in 1980s. Washburn parcel has been inactive and abandoned since that time. The adjoining portion of the Site consists of commercial/industrial properties that were also developed prior to the late 1800s. These parcels were used for various purposes including parking lots, automotive garages, auto tow yards, auto repair shops, a woodworking shop, warehouses, a paint shop, a soda water factory, a chemical company, a flooring company, an iron works and a bakery.These uses were terminated in early 2000s. The areas adjacent to the Site are used for commercial and residential purposes. The Site, presently owned by Tiago Holding Company is planned to be redeveloped for commercial retail uses and possible residential use. Redevelopment plans include excavation of the majority of the site to the depths of 8 feet below the present grade elevation. The site remediation included soil excavation to the water table and transportation off-site to disposal facilities. All underground structures including tank vaults were properly removed and disposed. All disposal was to approved facilities with appropriate waste characterization, approvals and manifesting. Post-excavation sampling documented that no VOCs, metals or SVOCs were detected above Track 4 SCOs in the remaining soil. An engineered composite cover system consisting of a minimum one foot of gravel and an demarcation layer was constructed onsite during the remedial process. This cover will undergo modification during site development and will be replaced by the final cover system of asphalt and concrete-covered roads, concrete sidewalks, and concrete building slabs. The Final Engineering Report (FER) documenting the remedial work includes an Site Management Plan (SMP). The SMP includes provisions for long-term management of residual contamination as required by the Environmental Easement, including plans for Institutional and Engineering Controls, monitoring, operation and maintenance, and reporting. The institutional controls include limitations of property use to commercial and restricted residential, restriction of residential habitation to the second or higher floors, prohibition of vegetable gardens, implementation of an SMP, prohibition of groundwater use, protection/replacement of groundwater monitoring wells, and annual certification. The remedial construction was completed in November 2007. An Environmental Easement was executed by the Department on this property and filed in the New York City Office of the Register on December 21, 2007. A Site Management Plan was accepted on December 21, 2007. The Final Engineering Report was approved and a Certificate of Completion was issued on December 28, 2007.

Site Environmental Assessment
The Site has been extensively investigated. 1995 Phase 1 investigation reported that the property contained a Leaking Underground Storage Tank (LUST) with Spill # 90-12286. Five acid tanks and a 25,000-gallon gravity tank were reported. Modified Phase 1 performed in 1996 indicated surficial staining and two underground storage tanks (UST). Soil sampling indicated SVOCs and metal contamination. Supplemental Investigation was conducted in 1998 reported two USTs including a 2,500-gallon and a 4,000-gallon steel UST containing lubricating oil. A Phase 2 ESA was performed in 1999 indicated low levels of SVOCs and metals in groundwater. Additional Investigations conducted in mid-2000 detected elevated levels of lead and cadmium in surface soils. Many USTs were removed from 2000 to 2003. In 2003, buildings were demolished and removal of three 12,000-gallon and two 16,000-gallon tanks and associated petroleum was performed. Two 550-gallon gasoline USTs, one 1,000-gallon heating oil AST and one 275-gallon heating oil were removed. The Remedial Action completed (November 2007) has made the Site protective of human health and the environment to standards consistent with the contemplated end use. The proposed redevelopment plan and end use is commercial use with residential use on the second floor and higher floors. The following contaminants of concern were identified: Soil - Petroleum compounds and metals were identified in soil on the site at concentrations above the NYSDEC TAGM 4046 Recommend Soil Cleanup Objective (RSCOs). These exceedances were primarily noted in the former tank vault area, in the former acid tank area, and in an area on the west portion of the site. During the remedial excavation, the impacted soil within the site boundaries was excavated and disposed off-site. End point confirmatory samples were collected (66 soil samples) and verified that the residual soil meets the Site-specific (Track 4) soil cleanup objectives (SCOs). Groundwater - During the remedial excavation impacted groundwater was removed from the site via pumps, treated in a frac tank, and discharged to an off-site municipal sewer. Groundwater sampling performed following the completion of the remedial excavation indicated no exceedances of the NYSDEC standards for VOCs or SVOCs in the upgradient wells. Inorganic metals concentrations detected following remediation are similar to or lower than the concentrations prior to remediation. Soil Vapor - VOCs were detected in soil vapor at the site at relatively low concentrations and include some petroleum compounds and chlorinated solvents. The remedial activities, including soil excavation, product removal, and groundwater removal, largely eliminated any onsite sources for soil vapor. The remedial excavation was conducted down to nearly the water table surface and the planned construction will place the base of the building slabs at approximately one foot above the top of the water table. Therefore, there will be little or no space in which soil vapors can accumulate beneath the planned building. The building will include a full-foundation waterproofing membrane/vapor barrier and the use of foundation penetration seals for added vapor protection. Remediation included excavation and off-site disposal of all contaminated soils and other underground structures. A total of 86,516 tons of impacted soils was removed and disposed in approved facilities. Approximately 2,470,652 gallons of groundwater were disposed off-site (to the NYCDEP sewer system under a permit) during remedial activities. Approximately 15,600 tons of gravel were imported for backfill and cover purposes. These materials were tested and confirmed to be acceptable. An engineered composite cover system consisting of a minimum one foot of gravel and an demarcation layer was constructed onsite during the remedial process. The Site Management Plan (SMP) includes provisions for long-term management of residual contamination as required by the Environmental Easement, including plans for Institutional and Engineering Controls, monitoring, operation and maintenance, and reporting. The institutional controls include limitations of property use to commercial and restricted residential, restriction of residential habitation to the second or higher floors, prohibition of vegetable gardens, implementation of an SMP, prohibition of groundwater use, protection/replacement of groundwater monitoring wells, and annual certification. Environmental Easements have been recorded.

Site Health Assessment
Soil and groundwater at the site are contaminated with volatile organic compounds (VOCs), semi-volatile organic compounds (SVOCs), metals and petroleum products. Human exposures to contaminated soil and groundwater are unlikely. The site will be covered by pavement and most contamination lies at depth. Exposure to groundwater is unlikely since the area is served by public water. The current development plans include installing a vapor barrier and a sub grade parking garage. An investigation for soil vapor intrusion will be initiated if any future residential or retail space is planned for the subgrade areas.

Contaminants of Concern

Type of Waste Quantity
1,3,5-TRIOXANE, 2,4,6-TRIMETHYL- UNKNOWN
ARSENIC UNKNOWN
BARIUM UNKNOWN
BENZENE UNKNOWN
BENZO(A)PYRENE UNKNOWN
BENZO(B)FLUORANTHENE UNKNOWN
BENZO[K]FLUORANTHENE UNKNOWN
BERYLLIUM UNKNOWN
DIBENZ[A,H]ANTHRACENE UNKNOWN
FLUORENE UNKNOWN
LEAD UNKNOWN
MTBE (METHYL-TERT-BUTYL ETHER) UNKNOWN
NAPHTHALENE UNKNOWN
PHENANTHRENE UNKNOWN
PYRENE UNKNOWN
TOLUENE UNKNOWN

admin, Debra Hall

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