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Record of Decision System (RODS)

HENDERSON ROAD

Abstract

Site Name:  HENDERSON ROAD
Address:  372 S HENDERSON ROAD 
City & State:  UPPER MERION TOWNSHIP  PA  19406
County:  MONTGOMERY
 
EPA ID:  PAD009862939
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-89/049
ROD Date:  09/29/1989
Operable Unit(s):  02
 
Media:  SOIL GROUNDWATER
 
Contaminant:  VOCS, BENZENE, TCE, PCE, TOLUENE ORGANICS, PAHS
 
Abstract:  THE HENDERSON ROAD SITE IS A 7.6-ACRE SITE IN UPPER MERION TOWNSHIP, PENNSYLVANIA. O'HARA SANITATION COMPANY, INC. HAS USED THE SITE FOR WASTE STORAGE, WASTE RECYCLING, VEHICLE MAINTENANCE, AND PARKING AND OFFICE FACILITIES SINCE 1974. THE AREA SURROUNDING THE SITE IS ZONED FOR INDUSTRIAL AND RESIDENTIAL USE. THE SITE IS BOUNDED BY THE PENNSYLVANIA TURNPIKE, THE CONRAIL PROPERTY INCLUDING TRAIN TRACKS, HENDERSON ROAD, AND FROG RUN. THE UPPER MERION RESERVOIR, LOCATED 2,000 FEET UPGRADIENT OF THE SITE, SERVES AS PART OF THE WATER SOURCE FOR APPROXIMATELY 228,000 PEOPLE. PRIOR TO 1974 THE SITE WAS OPERATED BY THE ELLIS CONCRETE COMPANY AS A CONCRETE PREPARATION PLANT. DURING THIS OPERATION CINDERS MAY HAVE BEEN PLACED ON THE WESTERN PORTION OF THE SITE AND ON ADJACENT RAILROAD PROPERTY. IN 1974 WILLIAM J. O'HARA, INC. BEGAN LANDFILLING TRASH AND CONSTRUCTION DEBRIS ON CENTRAL AND EASTERN PORTIONS OF THE SITE UNTIL 1984. BETWEEN 1974 AND 1977 WILLIAM J. O'HARA, INC. ALLEDGEDLY INJECTED INDUSTRIAL WASTE INTO A 160-FOOT ONSITE WELL. FURTHERMORE, LIQUID WASTE, SLUDGE, AND DRUMS MAY HAVE BEEN DISPOSED OF IN THE LANDFILL. THE FIRST OPERABLE UNIT FOR THIS SITE, AS DESCRIBED IN A JUNE 1988 RECORD OF DECISION, INCLUDED PUMPING AND TREATMENT, USING AIR STRIPPERS, OF CONTAMINATED GROUND WATER. THIS WILL BE ACCOMPANIED BY ADDITIONAL CHARACTERIZATION OF THE INJECTION WELL, EXAVATION OF OIL PIT SEDIMENT IF FOUND, REMOVAL OF SIGNIFICANT WASTE WITHIN THE WELL IF FEASIBLE, INSTITUTIONAL CONTROLS, FURTHER CHARACTERIZATION OF SATURATED AND UNSATURATED ZONES, POSSIBLY DIRECT TREATMENT IN THE UNSATURATED ZONE, MONITORING, AND PERIODIC EVALUATION OF CLEANUP GOALS. THE SECOND OPERABLE UNIT ADDRESSES ALL SURFACE SOURCES OF CONTAMINATION AT THE SITE. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL AND GROUND WATER ARE VOCS INCLUDING BENZENE, TOLUENE, PCE, AND TCE; AND OTHER ORGANICS INCLUDING PAHS. THE PREDOMINANT CARCINOGENIC RISK FOR THE LANDFILL OPERABLE UNIT (LOU) IS BASED ON THE PREDICTION OF MOVEMENT OF LEACHATE TO GROUNDWATER. OF THE 19 CHEMICALS OF CONCERN IDENTIFIED FOR THE LOU, BIS (2-CHLOROETHYL) ETHER AND SIX VOLATILES ARE CONSIDERED BY EPA TO POSE THE GREATEST THREAT TO GROUND WATER. OTHER ROUTES OF EXPOSURE INCLUDE THOSE FROM INGESTION OF SOIL AND INHALATION OF FUGATIVE EMISSIONS.


THE SELECTED REMEDIAL ACTION FOR THIS OPERABLE UNIT INCLUDES INSTALLATION OF EROSION CONTROLS; REGRADING AND CAPPING, INCLUDING POSSIBLY MOVING THE ONSITE WATERMAIN; INSTALLING A SHORT AND LONG-TERM LEACHATE COLLECTION SYSTEM WITH TREATMENT AND DISCHARGE TO BE DETERMINED DURING DESIGN; EXCAVATION AND ONSITE CONSOLIDATION OF TRASH, SOIL, AND CINDER CURRENTLY LOCATED AT THE ADJACENT TURNPIKE PROPERTY WITH APPROPRIATE REMEDIATION OF WASTES LEFT IN PLACE AT THE TURNPIKE PROPERTY; FURTHER SAMPLE COLLECTION AND DATA EVALUATION IN THE WESTERN PORTION OF THE SITE LEADING TO A DETERMINATION REGARDING TREATMENT AND/OR CAPPING IN THAT AREA, AND CONTINGENT GROUND WATER RECOVERY; MONITORING OF GROUND WATER AND LEACHATE; AND INSTITUTIONAL CONTROLS. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $7,265,000, WHICH INCLUDES AN ANNUAL O&M COST OF $213,260.
 
Remedy:  THIS OPERABLE UNIT IS THE SECOND OF TWO OPERABLE UNITS THAT ADDRESS CONTAMINATION AT THE SITE. THIS OPERABLE UNIT, THE LANDFILL OPERABLE UNIT, ADDRESSES SOILS, SURFACE WATER, AIR, AND GROUND WATER POTENTIALLY IMPACTED BY PREVIOUS LANDFILLING, SURFACE PLACEMENT, AND POSSIBLE TRENCHING ON-SITE, IN ADDITION TO POTENTIAL LEAKAGE FROM ON-SITE UNDERGROUND STORAGE TANKS. THE FIRST OPERABLE UNIT, THE INJECTION WELL OPERABLE UNIT, ADDRESSES GROUND WATER CONTAMINATION CAUSED BY INJECTION OF HAZARDOUS SUBSTANCES INTO AN ON-SITE WELL PRIOR TO 1977 AND THE RISKS ASSOCIATED WITH EXPOSURE TO GROUND WATER CONTAMINATED FROM THAT WELL.

THE MAJOR COMPONENTS OF THE SELECTED REMEDY FOR THE LANDFILL OPERABLE UNIT INCLUDE;

* RUN-ON, RUN-OFF, AND EROSION CONTROLS
* SHORT AND LONG-TERM LEACHATE COLLECTION
* CAPPING OVER THE LANDFILL, INCLUDING MOVING THE ON-SITE WATER MAIN UNLESS A MEANS OF MAINTAINING THE WATER LINE ON-SITE AND ADDRESSING REMEDIAL OBJECTIVES AND STATE ARARS IS DESIGNED.
* GROUND WATER RECOVERY AND TREATMENT IF, AFTER TWO YEARS OF PUMPING GROUND WATER BENEATH THE SITE FOR THE INJECTION WELL OPERABLE UNIT, SITE-RELATED GROUND WATER CONTAMINATION IS DETECTED OR NEAR AT THE PROPERTY LINE AND GROUND WATER IS STILL LEAVING THE SITE.
* MOVEMENT TO THE HENDERSON ROAD SITE OF TRASH, SHALLOW SOILS AND SHALLOW CINDER FILL FROM THE PENNSYLVANIA TURNPIKE PROPERTY ADJACENT TO THE SITE, ADDITIONAL CHARACTERIZATION OF THE TURNPIKE PROPERTY, AND APPROPRIATE REMEDIATION TO ADDRESS WASTES, CONTAMINATED SOIL AND BEDROCK LEFT IN PLACE, IF ANY, AND LEACHATE.
* MONITORING IN COORDINATION WITH THE INJECTION WELL OPERABLE UNIT.
* INSTITUTIONAL CONTROLS ON-SITE AND ON ADJACENT PROPERTIES TO RESTRICT ACTIVITIES THAT WOULD INTERFERE WITH REMEDIATION AT THE SITE.
* FURTHER SAMPLE COLLECTION AND DATA EVALUATION IN THE WESTERN PORTION OF THE SITE, IN COORDINATION WITH THE INJECTION WELL OPERABLE UNIT, LEADING TO A DETERMINATION WHETHER TO PILOT TEST FOR, AND POSSIBLY, COMMENCE IN-SITU VOLATILIZATION OR OTHER TREATMENT AND/OR CAPPING IN THAT AREA.
* PERIODIC REEVALUATION OF CLEAN-UP GOALS THROUGHOUT OPERATION AND MAINTENANCE, IN COORDINATION WITH THE INJECTION WELL OPERABLE UNIT.
 
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