Orange AveNUE Transit Oriented Development
Suffern, New York
Phase I & II Site Investigation
Orange Avenue Associates
PVE, LLC (PVE) was retained by the purchaser of five contiguous parcels near the Suffern New York Metro-North Rail Station located in the Village of Suffern, New York, to apply for acceptance into the NYSDEC Brownfield Cleanup Program (BCP) and satisfy all program requirements.
Summary of Site
The parcel at 122 Orange Avenue was originally developed in 1902 and was operated as a bottling works facility. Later uses of various portions of the site included a rubber vulcanizing facility, battery charging station, welding shop, blacksmith, and a printing shop. The lot at 128 Orange Avenue was developed as early as 1925 and was operated as a 25-car garage with a store, offices, and two 980-gallon gasoline tanks. 130 Orange Avenue operated as a gasoline service station and automotive repair facility between 1936 and 1980s. The developer is proposing a transit-oriented development which includes multi-family residential units with ground-level commercial spaces.
A Phase II Investigation was completed by PVE in 2013; the investigation identified areas of contaminated soil adversely impacted from past site operations. Concentrations of lead, arsenic, mercury and other compounds were detected at elevated concentrations. Based on these findings, PVE consulted the client to submit an application to gain acceptance of the Site into the NYSDEC BCP. The application was accepted in March of 2014. Based on limited contamination of the other parcels, only 122 Orange Avenue was accepted into the BCP. A Remedial Investigation Work Plan was prepared by PVE and accepted by the NYSDEC in October of 2014.
Summary of Investigations
Remedial Investigations at the site have included the following:
Installation and sampling of conventional groundwater monitoring wells completed in bedrock to depths of approximately 35 feet below grade.
Completion of approximately 50 soil borings to confirm areas of known contaminants.
A comprehensive vapor intrusion evaluation including sub-slab and soil-gas sampling in accordance with NYSDOH requirements.
Shallow and deeper interval soils contained contaminants at concentrations exceeding intended residential use. Groundwater contaminants detected consisted of naturally occurring elements. Soil vapor contaminants were detected throughout the site; however, these concentrations did not warrant the installation of vapor mitigation tactics during Site redevelopment.
Remediation of the Site included the excavation and off-Site disposal of approximately 3,265.89-tons of non-hazardous contaminated soils between September 19 and September 26, 2016. Excavation of contaminated soils was completed to the depth of bedrock or any soils proposed to be left-in-place overlying bedrock were sampled at a frequency approved by the NYSDEC.
An additional 1,369.23-tons of historic fill (coal, coal ash and metal debris) was excavated and disposed of from September 29 to October 3, 2016. Two underground storage tanks (USTs) were encountered during excavation, registered with Rockland County, unearthed, cleaned and disposed of off-Site in accordance with applicable regulatory documents during site remediation.
PVE collected a total of 18 end-point confirmatory samples to assess soils remaining in place following remedial excavations. Additionally, PVE collected a total of 12 end-point confirmatory samples from areas surrounding the unearthed USTs. All soils remaining in place at the Site met Unrestricted Use Criteria.
Certificate of Completion
PVE prepared the Final Engineering Report (FER) outlining the remedial activities described above. The FER was accepted by the NYSDEC in September of 2017. A Certificate of Completion detailing the site satisfying its remedial program and meeting Track 1 Unrestricted Use was received in November of 2017.