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Record of Decision System (RODS)

DORNEY ROAD LANDFILL

Abstract

Site Name:  DORNEY ROAD LANDFILL
Address:  DORNEY RD 
City & State:  UPPER MACUNGIE TOWNSHIP  PA  19539
County:  LEHIGH
 
EPA ID:  PAD980508832
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-91/127
ROD Date:  09/30/1991
Operable Unit(s):  02
 
Media:  GROUNDWATER
 
Contaminant:  VOCS, BENZENE, TCE, METALS, CHROMIUM, LEAD
 
Abstract:  THE 27-ACRE DORNEY ROAD SITE IS A LANDFILL IN UPPER MACUNGIE TOWNSHIP, LEHIGH COUNTY, PENNSYLVANIA. LAND USE IMMEDIATELY SURROUNDING THE SITE IS RURAL, RESIDENTIAL, AND AGRICULTURAL. APPROXIMATELY 7 ACRES OF WETLANDS, INCLUDING PONDED AREAS, ARE SCATTERED THROUGHOUT THE SITE, WITH THE GREATEST CONCENTRATION OF THESE AREAS IN THE NORTH-CENTRAL PART OF THE SITE. THE ESTIMATED 20 RESIDENTS LIVING WITHIN 1/4 MILE OF THE SITE USE GROUND WATER AS THE PRIMARY SOURCE OF POTABLE WATER. PRIOR TO 1959, THE SITE WAS USED AS AN OPEN PIT IRON MINE. FROM 1959 TO 1979, MUNICIPAL AND INDUSTRIAL WASTES WERE DISPOSED OF IN THE ONSITE ABANDONED IRON MINE PIT AND ON THE SURROUNDING LAND. IN 1970, THE STATE REQUESTED THAT THE LANDFILL BE COMPACTED AND COVERED, BUT THE OWNERS FAILED TO COMPLY. STATE INSPECTIONS DURING 1970 TO 1972 IDENTIFIED A VARIETY OF WASTES DISPOSED OF AT THE LANDFILL INCLUDING ELECTRIC UTILITY PLANT SLUDGE, BATTERY CASINGS, BARRELS OF PETROLEUM PRODUCTS, AND ASBESTOS FLOORING WASTE. THE SITE WAS CLOSED IN 1978 BECAUSE THE OWNERS WERE UNABLE TO ACQUIRE A LANDFILL PERMIT TO RENEW DISPOSAL OPERATIONS. IN 1986, EPA PERFORMED AN EMERGENCY REMOVAL ACTION TO REGRADE A PORTION OF THE SITE TO COLLECT AND CONTAIN ONSITE SURFACE RUNOFF. ALTHOUGH A SOIL COVER WAS APPLIED TO PORTIONS OF THE SITE, THE LANDFILL WAS NEVER GRADED AND CAPPED, AND ONSITE WASTE CONTINUES TO BE EXPOSED IN AREAS. SEEPAGE OF LEACHATE FROM LANDFILL WASTES IS THE PRINCIPAL SOURCE OF GROUND WATER CONTAMINATION. A 1988 RECORD OF DECISION (ROD) ADDRESSED OPERABLE UNIT 1 (OU1) AND PROVIDED FOR ELIMINATION OF ONSITE PONDED WATER; REGRADING AND MULTI-LAYER CAPPING OF THE SITE; INSTALLING RUN-ON/OFF CONTROLS; GROUND WATER MONITORING; AND IMPLEMENTING INSTITUTIONAL CONTROLS INCLUDING DEED RESTRICTIONS AND SITE ACCESS RESTRICTIONS INCLUDING PERIMETER FENCING. IN 1991, EPA ISSUED AN EXPLANATION OF SIGNIFICANT DIFFERENCES (ESD) FOR OU1 REQUIRING MITIGATION OF WETLANDS AREAS AFFECTED DURING CAP CONSTRUCTION. THIS ROD ADDRESSES GROUND WATER CONTAMINATION AS OU2, AND PROVIDES A FINAL REMEDY FOR THE SITE. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE GROUND WATER ARE VOCS INCLUDING BENZENE AND TCE; AND METALS INCLUDING CHROMIUM AND LEAD.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES PROVIDING WELLHEAD TREATMENT USING CARBON ADSORPTION FOR THE PRIVATE WELLS OF AFFECTED RESIDENCES, AND GROUND WATER MONITORING. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $274,040, WHICH INCLUDES AN ANNUAL O&M COST OF $14,410.

PERFORMANCE STANDARDS OR GOALS; ARAR WAIVERS WILL BE ISSUED FOR STATE STANDARDS, SPECIFICALLY THOSE REQUIRING REMEDIATION OF ONSITE GROUND WATER TO BACKGROUND LEVELS AND REMEDIATION OF OFFSITE GROUND WATER TO MCLS ON THE BASIS OF TECHNICAL IMPRACTICABILITY. IN ADDITION, DATA INDICATE THAT GROUND WATER CONTAMINATION APPEARS TO BE NATURALLY ATTENUATING. GROUND WATER ACTION CLEAN-UP LEVELS ARE BASED ON MCLS, RISK LEVELS, AND STATE STANDARDS, AND INCLUDE BENZENE 5 UG/L, TCE 5 UG/L, CHROMIUM 100 UG/L, AND LEAD 15 UG/L.
 
Remedy:  THIS OPERABLE UNIT IS THE SECOND OF TWO OPERABLE UNITS FOR THE SITE. IN SEPTEMBER 1988, EPA ISSUED A ROD FOR OPERABLE UNIT 1 (OU 1). THE ROD FOR OU 1 DOCUMENTED THE SELECTED REMEDY FOR THE LANDFILL WASTE, AND REQUIRED A LOW PERMEABILITY CAP FOR THE LANDFILL IN ACCORDANCE WITH THE PENNSYLVANIA MUNICIPAL WASTE MANAGEMENT REGULATIONS. OTHER COMPONENTS, SUCH AS RUNON/RUNOFF CONTROLS, PERIMETER FENCING, GROUND WATER MONITORING, AND DEED RESTRICTIONS WERE REQUIRED. IN SEPTEMBER 1991, EPA ISSUED AN EXPLANATION OF SIGNIFICANT DIFFERENCES WITH RESPECT TO THAT ROD, REQUIRING MITIGATION OF THE WETLANDS LOCATED ON TOP OF THE LANDFILL. THE REMEDY FOR OU 1 ADDRESSED THE RELATIVELY LOW, LONG-TERM THREAT POSED BY THE LANDFILL WASTES. THIS ROD DOCUMENTS THE REMEDY FOR OPERABLE UNIT 2 (OU 2), WHICH FOCUSES ON THE GROUND WATER, AND ADDRESSES THE PRINCIPAL EXPOSURE PATHWAY. BECAUSE THIS REMEDY WILL RESULT IN CONTAMINATED MATERIALS REMAINING ON-SITE, A 5 YEAR REVIEW PURSUANT TO CERCLA, WILL BE REQUIRED TO MONITOR THE EFFECTIVENESS OF THIS REMEDY.

THE SELECTED REMEDY INCLUDES THE FOLLOWING MAJOR COMPONENTS;
* WELLHEAD TREATMENT UNITS TO BE PROVIDED TO RESIDENCES IF LEVELS OF SITE-RELATED CONTAMINANTS EXCEED ACTION LEVELS
* GROUND WATER MONITORING.
 
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