EPT notified NYSDEC of the discovery of TCE in oil skimmed off
the surface of an underground fire reservoir. At this time, EPT
hired Radian Corporation to prepare a preliminary environmental
assessment to address TCE contamination in the fire reservoir
and to investigate whether TCE had impacted groundwater.
part of this work, the reservoir was emptied and cleaned using
high pressure water and five monitoring wells were installed.
Samples were collected of the groundwater from those wells, soil,
surface water and sediment from Six Mile Creek, and seeps. This
sampling showed local groundwater was contaminated and that the
fire reservoir was likely a source.. The study also detected petroleum
hydrocarbons in soil taken from the railroad ditch.
1987: The site was added to the New York State Registry of
Inactive Hazardous Waste Disposal Sites.
1988: EPT signed a consent order with the NYSDEC for a remedial
investigation/feasibility study (RI/FS) and remedial program at
1990: Radian Corporation submitted the RI. This information
was used to evaluate interim remedial measure (IRM) alternatives
and to complete the Feasibility Study (FS).
1991: EPT entered into a consent order for an IRM.
1991: EPT finished construction of a groundwater extraction
and treatment system (henceforth referred to as "pump and
treat system") to operate as an IRM prior to completion of
1991: NYSDOH collected air samples from homes near the Morse
site. Based on these samples, the NYSDOH requested and EPT agreed
to install vadose zone monitoring wells to assess the potential
for impacts adjacent to the site.
1992: The Fire Reservoir was rehabilitated and put back into
service. Cracks in the concrete were patched and a liner was installed.
1994: EPT completed a pilot test using the Xerox Two-Phase
Vacuum Extraction system, which was initiated in October 1993.
Pilot test objectives included: evaluating system effectiveness
for removing VOCs from the soil, dewatered bedrock, and groundwater;
comparing system performance to the pump and treat system; and
evaluating the benefit of supplementing or replacing the pump
and treat system with two-phase vacuum extraction for remediation.
pilot test results showed that the two-phase vacuum extraction
system outperforms the pump and treat system. The two-phase vacuum
extraction system removes greater quantities of groundwater, has
higher VOC removal rates, and has a greater zone of influence.
1994: Four vadose monitoring wells were installed and will
be sampled on two occasions. This investigation will be completed
concurrently with the monitoring program for the remedy selected
by the PRAP. Should the need for further remediation or other
mitigation be identified it will be evaluated as a component of
the operation and maintenance program for the site.