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Record of Decision System (RODS)

E.H. SCHILLING LANDFILL

Abstract

Site Name:  E.H. SCHILLING LANDFILL
Address:  RTE 52 & PATRIC RD 
City & State:  HAMILTON TOWNSHIP  OH  45695
County:  LAWRENCE
 
EPA ID:  OHD980509947
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-89/099
ROD Date:  09/29/1989
Operable Unit(s):  01
 
Media:  SOIL SEDIMENT GROUNDWATER
 
Contaminant:  VOCS, BENZENE, PAHS, PERSTICIDES, PHENOL, ARSENIC
 
Abstract:  THE E.H. SCHILLING LANDFILL SITE IS IN HAMILTON TOWNSHIP, LAWRENCE COUNTY, OHIO. THE SITE IS A 2.7-ACRE LANDFILL ON A LARGER TRACT OF LAND. THE PREDOMINANTLY RURAL AREA NEIGHBORING THE SITE INCLUDES APPROXIMATELY 50 RESIDENCES, WHICH ARE BETWEEN 0.25 MILE AND 1.5 MILES FROM THE SITE. THE LANDFILL WAS CREATED BY CONSTRUCTING A DAM ACROSS A SMALL VALLEY. BOTH THE LANDFILL COVER AND DAM HAVE BEEN DESCRIBED AS INADEQUATE, AND LEACHATE CONTAINING HAZARDOUS SUBSTANCES IS BEING RELEASED THROUGH AND BENEATH THE DAM. FROM 1969 TO 1980 THE LANDFILL OPERATORS ACCEPTED BOTH NONHAZARDOUS AND HAZARDOUS WASTES INCLUDING STYRENE, PHENOL, ACETONE, ALCOHOL, WASTEWATER TREATMENT SLUDGE, COAL TAR COMPOUNDS, AND CUMENE. RESULTS FROM A 1988 INVESTIGATION REVEAL THAT SOIL AND SEDIMENT CONTAMINATION IS LIMITED TO THE AREA IMMEDIATELY ADJACENT TO THE DAM, AND GROUND WATER CONTAMINATION IS LIMITED TO THE MONITORING WELLS IMMEDIATELY SURROUNDING THE LANDFILL AND THE MONITORING WELLS DOWNGRADIENT OF THE DAM. CONTAMINATION APPEARS TO BE DUE TO LEACHATE RUNOFF. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL, SEDIMENT, AND GROUND WATER ARE VOCS INCLUDING BENZENE; OTHER ORGANICS INCLUDING PAHS, PESTICIDES, AND PHENOL; AND METALS INCLUDING ARSENIC.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES EXCAVATION OF 500 CUBIC YARDS OF SEDIMENT AND 750 CUBIC YARDS OF SURFACE SOIL FOR CONSOLIDATION IN THE LANDFILL; CONSTRUCTION OF A 2.7-ACRE RCRA CAP TO CONTAIN 100,000 CUBIC YARDS OF LANDFILL WASTE; CONSTRUCTION OF A CLAY BERM TO IMPROVE DAM STABILITY; CONSTRUCTION OF A PERIMETER CUT-OFF WALL TO ELIMINATE THE LATERAL FLOW OF GROUND WATER INTO THE LANDFILL WASTE; CONSTRUCTION OF AN INTERCEPTOR DRAIN OUTSIDE THE CUT-OFF WALL TO DRAIN GROUND WATER AWAY FROM THE LANDFILL; DEWATERING THE LANDFILL OF 7,000,000 GALLONS OF LEACHATE AND TREATING THE LEACHATE USING METAL PRECIPITATION, AIR STRIPPING, AND CARBON ADSORPTION TO REMOVE ORGANICS AND SULFIDE PRECIPITATION TO REMOVE INORGANICS, FOLLOWED BY DISCHARGE TO SURFACE WATER; TREATMENT AND DISCHARGE OF AN ADDITIONAL 1,000,000 GALLONS OF WASTEWATER GENERATED DURING THE REMEDIAL ACTION; GROUND WATER MONITORING; AND IMPLEMENTATION OF ACCESS AND INSTITUTIONAL CONTROLS. THE ESTIMATED TOTAL PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $9,412,000, WHICH INCLUDES AN ESTIMATED ANNUAL O&M COST OF $99,000 FOR 30 YEARS.
 
Remedy:  THE RESPONSE ACTION AT THE E.H. SCHILLING LANDFILL ADDRESSES THE ENTIRE SITE. A CONTAINMENT WITH TREATMENT OPTION HAS BEEN CHOSEN AND WILL REQUIRE LONG TERM MANAGEMENT.

THE MAJOR COMPONENTS OF THE SELECTED REMEDY INCLUDE THE FOLLOWING:

* DEWATERING THE LANDFILL OF APPROXIMATELY 7,000,000 GALLONS OF LEACHATE. THE COLLECTED LIQUIDS WILL BE TREATED WITH AIR STRIPPING AND CARBON ADSORPTION TO REMOVE ORGANICS, AND SULFIDE PRECIPITATION TO REMOVE INORGANICS, AND THEN DISCHARGED TO SURFACE WATER. AN ADDITIONAL 1,000,000 GALLONS OF WASTE WATER GENERATED DURING THE PROJECT WILL ALSO BE TREATED AND DISCHARGED. THE EFFLUENT WILL MEET THE EFFLUENT REQUIREMENTS OF THE NATIONAL POLLUTION DISCHARGE ELIMINATION SYSTEM (NPDES).
* CONSTRUCTION OF A 2.7 ACRE CAP THAT COMPLIES WITH SUBTITLE C OF RCRA OVER THE APPROXIMATELY 100,000 CUBIC YARDS OF WASTE. THE CAP WILL EXTEND OVER THE DAM FACE.
* CONSTRUCTION OF A PERIMETER CUT-OFF WALL, CONSISTING OF 15 FEET OF SLURRY WALL AND 10 FEET OF GROUT CURTAIN, TO PREVENT LATERAL FLOW OF GROUNDWATER INTO THE WASTE.
* CONSTRUCTION OF A CLAY BERM TO OBTAIN THE REQUIRED FACTOR OF SAFETY OF GREATER THAN 1.5 FOR LONG TERM STABILITY OF THE EARTHEN DAM.
* LONG TERM MAINTENANCE, SECURITY AND RESTRICTIONS ON FUTURE USE.
* QUARTERLY MONITORING OF ALL MONITORING WELLS. IF GROUNDWATER EXCEEDS ACTION BASED LEVELS, IT WILL BE COLLECTED AND TREATED IN THE LEACHATE TREATMENT PLANT ON-SITE VIA CARBON ADSORPTION, AIR STRIPPING AND METAL PRECIPITATION.
 
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