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Record of Decision System (RODS)

EAST MOUNT ZION

Abstract

Site Name:  EAST MOUNT ZION
Address:  DIENINGER ROAD 
City & State:  SPRINGETTSBURY TOWNSHIP  PA  17402
County:  YORK
 
EPA ID:  PAD980690549
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-90/103
ROD Date:  06/29/1990
Operable Unit(s):  01
 
Media:  GROUNDWATER
 
Contaminant:  VOCS, VINYL CHLORIDE, BENZENE
 
Abstract:  THE 10-ACRE EAST MT. ZION SITE IS A PRIVATELY OWNED, INACTIVE LANDFILL IN SPRINGETTSBURY TOWNSHIP, YORK COUNTY, PENNSYLVANIA. THE LANDFILL IS ON A FORESTED RIDGE ALONG WITH RECREATIONAL PARK LANDS AND A RESIDENTIAL SUBDIVISION. FROM 1955 TO 1972, DOMESTIC, MUNICIPAL AND INDUSTRIAL WASTES WERE DISPOSED OF ONSITE. IN 1969 AND 1971, THE LANDFILL WAS CITED FOR IMPROPER DISPOSAL PRACTICES AND WAS SUBSEQUENTLY CLOSED BY THE STATE IN 1972. IN 1983 AND 1988, STATE INVESTIGATIONS IDENTIFIED SEVERAL CONTAMINANTS IN ONSITE GROUND WATER AND LEACHATE. THIS RECORD OF DECISION (ROD) ADDRESSES THE GROUND WATER CONTAMINATION BY INHIBITING THE MOBILITY OF CONTAMINANTS FROM THE LANDFILL. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE GROUND WATER ARE VOCS INCLUDING VINYL CHLORIDE AND BENZENE.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES CAPPING THE LANDFILL WITH AN IMPERMEABLE MULTI-LAYER CAP; CONSTRUCTING A PASSIVE VENT SYSTEM TO CONTROL METHANE OFFGASSES; INSTALLING SURFACE WATER CONTROL SYSTEMS FOR THE CAP; ALLOWING NATURAL ATTENUATION TO REDUCE GROUND WATER CONTAMINATION TO BACKGROUND LEVELS; CONDUCTING GROUND WATER MONITORING TO MONITOR NATURAL ATTENUATION OF CONTAMINANTS; AND IMPLEMENTING INSTITUTIONAL CONTROLS, INCLUDING DEED RESTRICTIONS, AND SITE ACCESS RESTRICTIONS, SUCH AS FENCING. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $2,230,000, WHICH INCLUDES AN ANNUAL O&M COST FOR GROUND WATER MONITORING.

PERFORMANCE STANDARDS OR GOALS: BASED ON GROUND WATER VELOCITY AND THE ELIMINATION OF THE SOURCE, GROUND WATER CONCENTRATIONS ARE EXPECTED TO MEET BACKGROUND LEVELS WITHIN FIVE YEARS THROUGH NATURAL ATTENUATION. CHEMICAL-SPECIFIC GOALS FOR GROUND WATER INCLUDE BENZENE 5 UG/L (MCL), AND VINYL CHLORIDE 2 UG/L (MCL).
 
Remedy:  THIS REMEDY ADDRESSES REMEDIATION OF GROUNDWATER CONTAMINATION BY ELIMINATING OR REDUCING THE RISKS POSED BY THE SITE THROUGH ENGINEERING AND INSTITUTIONAL CONTROLS.

THE SELECTED REMEDY INCLUDES THE FOLLOWING MAJOR COMPONENTS;

* INSTALLATION AND MAINTENANCE OF AN IMPERMEABLE CAP AND GAS VENTS OVER THE 10-ACRE LANDFILL
* INSTALLATION AND MAINTENANCE OF SURFACE WATER CONTROL SYSTEMS FOR THE CAP
* INSTALLATION AND MAINTENANCE OF A FENCE AROUND THE SITE
* MONITORING GROUNDWATER CONTAMINANT ATTENUATION AFTER INSTALLATION OF THE CAP
* INITIATION OF A DEED RESTRICTION REGARDING FUTURE ACTIVITIES AT THE SITE
 
Text:  View full-text ROD [ 73K ]
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