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Record of Decision System (RODS)

TYSONS DUMP

Abstract

Site Name:  TYSONS DUMP
Address:  UNOBTAINABLE 
City & State:  UPPER MERION TWP  PA  19406
County:  MONTGOMERY
 
EPA ID:  PAD980692024
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-85/501
ROD Date:  12/21/1984
Operable Unit(s):  01
 
Media:  GROUNDWATER SOIL STREAM SEDIMENTS SURFACE WATER
 
Contaminant:  CHLORINATED BENZENES, TOLUENES, VOCS, XYLENES
 
Abstract:  THE TYSON'S DUMP SITE IS LOCATED IN SOUTHEASTERN PENNSYLVANIA, APPROXIMATELY 15 MILES NORTHWEST OF PHILADELPHIA. THE DUMP IS AN ABANDONED SEPTIC AND CHEMICAL WASTE DISPOSAL SITE WHICH OPERATED FROM 1960-1968. UNLINED LAGOONS WERE FILLED WITH WASTES AND COVERED, AND NEW LAGOONS WERE CREATED. MAJOR CONTAMINANTS FOUND AT THE SITE WERE VOLATILE ORGANIC COMPOUNDS, PRIMARILY XYLENES, TOLUENES, AND 1,2,3-TRICHLOROPROPANE. IN ADDITION, CHLORINATED BENZENE COMPOUNDS WERE ALSO DETECTED.

THE COST-EFFECTIVE REMEDIAL ALTERNATIVE SELECTED FOR THIS SITE INCLUDES EXCAVATION AND OFF-SITE DISPOSAL OF CONTAMINATED SOILS AND WASTES; UPGRADING OF THE EXISTING AIR-STRIPPING FACILITY TO TREAT LEACHATE, SHALLOW GROUND WATER, AND SURFACE RUN-ON; AND EXCAVATION AND OFF-SITE DISPOSAL OF CONTAMINATED SEDIMENTS WITHIN THE TRIBUTARY WHICH RECEIVES EFFLUENT FROM THE EXISTING AIR-STRIPPING FACILITY. THE ESTIMATED CAPITAL COST FOR THE SELECTED ALTERNATIVE IS $5,718,000 AND OPERATION AND MAINTENANCE COSTS FOR FIVE YEARS ARE ESTIMATED TO BE $351,000.
 
Remedy:  - EXCAVATION AND OFF-SITE DISPOSAL OF CONTAMINATED SOILS AND WASTES TO A PERMITTED RCRA LANDFILL.
- UPGRADING OF EXISTING AIR-STRIPPING FACILITY TO TREAT LEACHATE, SHALLOW GROUND WATER, AND SURFACE RUN-ON ENCOUNTERED DURING EXCAVATION. OPERATION OF THIS FACILITY IS PROJECTED TO REMAIN ON-LINE UNTIL RESIDUAL GROUND WATER CONTAMINATION IS ELIMINATED (EST. 5 YRS.).
- EXCAVATION AND OFF-SITE DISPOSAL OF CONTAMINATED SEDIMENTS WITHIN THE TRIBUTARY WHICH RECEIVES EFFLUENT FROM THE EXISTING AIR STRIPPER.
 
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