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Record of Decision System (RODS)

BALLY GROUND WATER CONTAMINATION

Abstract

Site Name:  BALLY GROUND WATER CONTAMINATION
Address:  ROUTE 100 20 N THIRD STREET 
City & State:  BALLY  PA  19503
County:  BERKS
 
EPA ID:  PAD061105128
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-89/070
ROD Date:  06/30/1989
Operable Unit(s):  01
 
Media:  GROUNDWATER WETLANDS
 
Contaminant:  PCE, SOLVENTS, TCE, VOCS
 
Abstract:  THE BALLY GROUND WATER SITE IS A MUNICIPAL WATER SUPPLY WELL FIELD IN THE BOROUGH OF BALLY IN BERKS COUNTY, NEAR THE PHILADELPHIA METROPOLITAN AREA. THE BALLY WELL FIELD AND THE SPRINGS TO THE NORTHWEST OF THE SITE ARE THE PUBLIC WATER SOURCES FOR APPROXIMATELY 1,200 BALLY RESIDENTS. THE AREA NEAR THE SITE INCLUDES WETLANDS TO THE NORTH AND A MANUFACTURING PLANT (THE PLANT) 1,000 FEET TO THE SOUTH OF ONE OF BALLY WELL FIELD'S MUNICIPAL WELLS (WELL NO. 3). SINCE THE 1930S DEGREASING SOLVENTS CONTAINING METHYLENE CHLORIDE, TCA, METHANOL, TOLUENE, AND TCE HAVE BEEN USED IN MANUFACTURING AT THE PLANT. ONE OF THE PLANT'S FACILITIES INCLUDES A DRUM STORAGE AREA WHICH CONTAINS EMPTY DRUMS, WASTE OIL, AND SPENT DEGREASERS. A 1982 STATE WATER QUALITY CHECK IDENTIFIED THE PLANT AS A SOURCE OF VOC CONTAMINATION IN BALLY'S MUNICIPAL WELLS. FORMER LAGOONS UNDERLIE THE PLANT AND ARE ALSO CONSIDERED POTENTIAL SOURCES OF AQUIFER CONTAMINATION. FROM DECEMBER 1982 TO MARCH 1987 THE BOROUGH OF BALLY DID NOT USE THE CONTAMINATED MUNICIPAL WELL NO. 3 FOR WATER SUPPLY ALTHOUGH THE WATER WAS PERIODICALLY PUMPED AND DISCHARGED INTO A NEARBY POND TO CONTAIN THE CONTAMINANT PLUME. PUMPING, HOWEVER, HAD THE EFFECT OF DRAWING VOCS DEEPER INTO THE AQUIFER. THE WELL WAS COMPLETELY SHUT DOWN IN MARCH 1987. RESULTS OF ADDITIONAL GROUND WATER CONTAMINATION STUDIES INDICATED THAT 19 OF 35 WELLS SAMPLED, CONTAINED DETECTABLE LEVELS OF VOCS. CURRENTLY A PLUME OF VOC-CONTAMINATED GROUND WATER EXTENDS FROM THE PLANT TO THE EAST AND NORTHEAST. PLUME CONTAMINANT MOVEMENT HAS BECOME MORE CONTROLLED SINCE PUMPING AND AIR STRIPPING PILOT TESTING BEGAN AT WELL NO. 3. GROUND WATER IS THE FOCUS OF THIS REMEDIATION BECAUSE NO REMAINING SOURCE OF VOC CONTAMINATION HAS BEEN IDENTIFIED ON THE SITE. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE GROUND WATER ARE VOCS INCLUDING TCE.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES ABANDONING APPROPRIATE WELLS IN THE ATTAINMENT AREA; PUMPING AND TREATMENT OF GROUND WATER FROM MUNICIPAL WELL NO. 3 BY AIR STRIPPING WITH EITHER VAPOR PHASE CARBON, REGENERABLE VAPOR PHASE CARBON, OR VAPOR PHASE CATALYTIC OXIDATION, FOLLOWED BY DISCHARGING TREATED WATER TO AN ADJACENT STREAM OR INTO THE MUNICIPAL POTABLE WATER SYSTEM, AS NEEDED, TO PROVIDE A SUITABLE ALTERNATIVE WATER SUPPLY; IMPLEMENTATION OF INSTITUTIONAL CONTROLS RESTRICTING THE USE OF OPERABLE PRIVATE WELLS AND THE CONSTRUCTION OF NEW WELLS WITHIN THE ATTAINMENT AREA; AND PERFORMING GROUND WATER AND SURFACE WATER MONITORING TO MEASURE CONTAMINANT CONCENTRATION AND MIGRATION. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION RANGES FROM $2,950,000 TO $3,640,000, WHICH INCLUDES O&M COSTS FROM $105,000 TO $189,000 DEPENDING ON THE CHOSEN TREATMENT OPTION.
 
Remedy:  THE REMEDIAL ALTERNATIVE PRESENTED IN THIS DOCUMENT IS THE PERMANENT REMEDY FOR RESOLVING THE GROUNDWATER CONTAMINATION AT THE SITE. THIS REMEDY IS COMPRISED OF THE FOLLOWING COMPONENTS;

1. ABANDONING APPROPRIATE EXISTING PRIVATE WELLS AND IMPLEMENTING INSTITUTIONAL CONTROLS ON THE USE OF OPERABLE PRIVATE WELLS AND THE CONSTRUCTION OF NEW WELLS;
2. PERFORMING GROUNDWATER AND SURFACE WATER MONITORING TO MEASURE CONTAMINANT CONCENTRATIONS AND MIGRATIONS BY REMOVING CONTAMINATED GROUNDWATER FROM THE AQUIFER THROUGH CONTINUOUS PUMPING OF MUNICIPAL WELL NO. 3;
3. TREATING THE EXTRACTED GROUNDWATER BY ONE OF THE TREATMENT OPTIONS RETAINED FOR CONSIDERATION AND DISCHARGING THE TREATED WATER FROM MUNICIPAL WELL NO. 3 TO THE ADJACENT STREAM OR INTO THE BOROUGH OF BALLY POTABLE WATER SYSTEM AS NEED TO PROVIDE SUITABLE ALTERNATIVE WATER SUPPLY;
4. PERFORMING NECESSARY ADDITIONAL STUDIES IN THE PRE-DESIGN PHASE TO EVALUATE THE CONFIGURATION OF ANY ADDITIONAL GROUNDWATER EXTRACTION WELL(S) REQUIRED.
 
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