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Record of Decision System (RODS)

WALSH LANDFILL

Abstract

Site Name:  WALSH LANDFILL
Address:  WALSH ROAD 
City & State:  HONEYBROOK TOWNSHIP  PA  19344
County:  CHESTER
 
EPA ID:  PAD980829527
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-90/089
ROD Date:  06/29/1990
Operable Unit(s):  01
 
Media:  SOIL SEDIMENT GROUNDWATER
 
Contaminant:  VOCS, BENZENE, PCE, TCE, OTHER ORGANICS, PAHS, METALS, ARSENIC, LEAD
 
Abstract:  THE 7-ACRE WALSH LANDFILL SITE ENCOMPASSES AN APPROXIMATELY 1.5-ACRE LANDFILL AND SURROUNDING AREA IN A HEAVILY WOODED REGION OF HONEYBROOK TOWNSHIP, CHESTER COUNTY, PENNSYLVANIA. THE LANDFILL REPORTEDLY RECEIVED MIXED MUNICIPAL AND INDUSTRIAL WASTES FOR DISPOSAL BETWEEN 1963 AND 1976; ALTHOUGH STATE INVESTIGATIONS IN 1979 REVEALED THAT DISPOSAL OF HAZARDOUS WASTE AT THE SITE HAD RESUMED AFTER THAT PERIOD. INVESTIGATIONS BY THE STATE REVEALED THE PRESENCE OF FIFTEEN TO TWENTY DRUMS CONTAINING VARIOUS HAZARDOUS SUBSTANCES, INCLUDING VOCS. FUMES FROM THE DRUMS REPORTEDLY SICKENED LOCAL RESIDENTS, AND ORGANIC AND INORGANIC COMPOUNDS WERE DETECTED IN MONITORING WELLS AND PRIVATE WELLS. IN ADDITION TO WASTE DISPOSAL, OPEN BURNING OF MATERIAL WAS CONDUCTED IN THE SOUTHEASTERN PORTION OF THE LANDFILL. RESIDENTIAL WELL SAMPLING FROM 1987 THROUGH 1989 RESULTED IN AN INTERIM REMEDIAL MEASURE IN 1989 TO PROVIDE BOTTLED WATER TO 44 RESIDENCES. CURRENTLY, THE SITE IS BEING OPERATED AS A SOLID WASTE TRANSFER STATION AND SALVAGE YARD, AND OPERATIONS ARE INCREASING THE VOLUME OF LANDFILL/JUNKYARD DEBRIS, AND THE OVERALL SIZE OF THE SITE. THIS RECORD OF DECISION (ROD) ADDRESSES FINAL SOURCE CONTROL FOR THE LANDFILL AND ALLOWS FOR EXPEDITED ACTION ON THE CONTAMINATED DRINKING WATER SUPPLY. A SECOND ROD WILL ADDRESS CONTAMINATED GROUNDWATER. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL, SEDIMENT, AND GROUNDWATER ARE VOCS INCLUDING BENZENE, PCE, AND TCE; OTHER ORGANICS INCLUDING PAHS; AND METALS INCLUDING ARSENIC AND LEAD.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES REMOVAL OF BULKY ITEMS AND DEBRIS FROM THE LANDFILL SURFACE FOR RESOURCE RECOVERY, FOLLOWED BY CONSTRUCTION OF AN APPROXIMATELY 5.2-ACRE LANDFILL CAP; PROVISION OF AN ALTERNATE WATER SUPPLY TO APPROXIMATELY 50 RESIDENCES BY EXTENDING THE MUNICIPAL WATER SYSTEM; GROUNDWATER MONITORING; AND IMPLEMENTATION OF SITE ACCESS RESTRICTIONS AND INSTITUTIONAL CONTROLS, INCLUDING LAND USE, GROUNDWATER USE, AND DEED RESTRICTIONS. THE ESTIMATED PRESENT WORTH COST OF THIS REMEDIAL ACTION IS $3,768,000, WHICH INCLUDES AN ESTIMATED ANNUAL O&M COST OF $63,090 FOR 25 YEARS EXCEPT YEARS 5, 10, 15, 20, AND 25 WHICH WILL HAVE AN ESTIMATED O&M COST OF $108,950 DUE TO THE FIVE-YEAR REVIEWS.

PERFORMANCE STANDARDS OR GOALS: PROVISION OF AN ALTERNATE WATER SUPPLY WILL ENSURE AVAILABILITY OF WATER MEETING SDWA MCLS.
 
Remedy:  EPA HAS SELECTED, AND THE COMMONWEALTH OF PENNSYLVANIA HAS CONCURRED ON, THE FOLLOWING REMEDIAL ACTION FOR THE FIRST OPERABLE UNIT AT THE WALSH LANDFILL SITE. THE REMEDIAL ACTION FOR THIS OPERABLE UNIT INCLUDES A FINAL SOURCE CONTROL ACTION FOR THE LANDFILL AND AN ALTERNATE WATER SUPPLY. THE SECOND OPERABLE UNIT WILL ADDRESS THE CONTAMINATED GROUNDWATER AQUIFER.

THE MAJOR COMPONENTS OF THE SELECTED REMEDIAL ACTION FOR THE FIRST OPERABLE UNIT ARE AS FOLLOWS:

* CONSTRUCTION OF NEW WATER SERVICE LINES, MAINS, HYDRANTS, AND VALVES, AND THE CONNECTION TO THE HONEY BROOK BOROUGH-WATER AUTHORITY'S WATER SUPPLY MAINS. IT IS ESTIMATED THAT 50 RESIDENCES WILL BE PROVIDED WITH THIS SERVICE, BASED ON PREVIOUS SAMPLING RESULTS, AND THE NUMBER OF RESIDENTS CURRENTLY RECEIVING BOTTLED WATER. THE NUMBER AND LOCATION OF RESIDENCES WHICH WILL RECEIVE PUBLIC WATER WILL BE VERIFIED DURING THE DESIGN OF THIS REMEDIAL ACTION.

* APPROXIMATELY 6500 FEET OF 8-INCH WATER MAIN, 7500 FEET OF 4-INCH AND 3000 FEET OF 2-INCH DISTRIBUTION LINES WILL BE INSTALLED ALONG PA STATE ROUTE 10 AND WELSH ROAD. SERVICE LINES WILL BE INSTALLED FOR EACH OF THE 50 HOUSEHOLDS.

* THE CURRENT WATER SUPPLY SYSTEM WILL BE UPGRADED TO PROVIDE SUFFICIENT CAPACITY TO SERVICE THE IMPACTED RESIDENCES. ONE WATER SUPPLY WELL WILL BE INSTALLED AND CONNECTED TO THE HONEY BROOK BOROUGH WATER SUPPLY SYSTEM. A BOOSTER PUMP AND 120,000-GALLON WATER STORAGE TANK WILL ALSO BE REQUIRED TO SERVICE THE RESIDENTS.

* CONTROL OF THE NEW WATER LINES AND SERVICES WILL BE TRANSFERRED TO THE HONEY BROOK BOROUGH WATER AUTHORITY AS SOON AS CONSTRUCTION IS COMPLETED.

* RESOURCE RECOVERY ACTIVITIES WILL BE COMPLETED TO REMOVE THE BULKY ITEMS AND DEBRIS FROM THE SURFACE OF THE LANDFILL IN ORDER TO PREPARE FOR CONSTRUCTION OF A LANDFILL CAP. ADDITIONAL INFORMATION WILL BE COLLECTED ON THE COMPOSITION OF THE LANDFILL MATERIAL DURING THE DESIGN OF A LANDFILL CAP. AT A MINIMUM, A MULTI-MEDIA LANDFILL CAP THAT MEETS THE REQUIREMENTS OF THE PENNSYLVANIA MUNICIPAL SOLID WASTE REGULATIONS WILL BE CONSTRUCTED AT THE SITE. THE CAP WILL CONSIST OF A TOPSOIL COMPONENT UNDERLAIN BY A SOIL LAYER, A DRAINAGE LAYER A PERMEABILITY GREATER THAN A 1 X (10-3) CM/SEC., A HIGH-DENSITY POLYETHYLENE GEOMEMBRANE, AND A BASE SOIL LAYER OVER LANDFILL. THE CAP WILL BE DESIGNED TO COVER AN AREA OF AT LEAST 5.2 ACRES, AND WILL BE VEGETATED AND SLOPED IN ACCORDANCE WITH THE STATE REGULATIONS. SURFACE WATER CONTROL MEASURES WILL INCORPORATED INTO THE DESIGN OF THE LANDFILL CAP.

* INSTITUTIONAL CONTROLS INCLUDING THE CONSTRUCTION OF A SIX-FOOT HIGH FENCE TOPPED WITH BARBED OR RAZOR WIRE AROUND THE PERIMETER OF THE LANDFILL, AND MODIFICATION OF THE PROPERTY DEEDS FOR THE LANDFILL WILL BE COMPLETED TO RESTRICT UNAUTHORIZED USE OR ACCESS TO THE SITE, AND TO RESTRICT FUTURE USE AND PROPERTY DEVELOPMENT.
 
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