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Record of Decision System (RODS)

KIMBERTON

Abstract

Site Name:  KIMBERTON
Address:  COLD STREAM & HARES HILL ROADS 
City & State:  KIMBERTON BOROUGH  PA  19442
County:  CHESTER
 
EPA ID:  PAD980691703
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-89/072
ROD Date:  06/30/1989
Operable Unit(s):  02
 
Media:  GROUNDWATER SURFACEWATER
 
Contaminant:  TCE, VOCS, DCE
 
Abstract:  THE KIMBERTON SITE IS IN CHESTER COUNTY, PENNSYLVANIA, NEAR THE PHILADELPHIA METROPOLITAN AREA. THE SITE ENCOMPASSES AN INDUSTRIAL PRODUCTION PLANT CURRENTLY OWNED BY MONSEY PRODUCTS COMPANY, INC., AND ADJACENT PROPERTIES WITHIN THE NEIGHBORING VILLAGE OF KIMBERTON. WATER QUALITY TESTING SINCE 1981 HAS REVEALED NUMEROUS AREA DOMESTIC AND COMMERICAL POTABLE WELL WATER SUPPLIES CONTAMINATED WITH VOCS. A PORTION OF THIS CONTAMINATION ORIGINATED FROM THE ONSITE INDUSTRIAL PRODUCTION PLANT, WHICH DISPOSED OF WASTES IN SEVERAL LAGOONS DURING THE 1950S. AN EPA INVESTIGATION IN THE SPRING OF 1982 REVEALED THE PRESENCE OF ORGANICS, INCLUDING TCE AND DCE, IN LOCAL GROUND WATER, SURFACE WATER, AND SOIL. IN MID 1982, FIFTY SEVEN, 55-GALLON DRUMS FROM AN ABANDONED ONSITE SEPTIC SYSTEM WERE EXCAVATED, REMOVED, AND DISPOSED OF OFFSITE. IN 1984 A REMEDIAL ACTION PROGRAM WAS INITIATED TO EXCAVATE, REMOVE, AND DISPOSE OF APPROXIMATELY 2,050 YD3 OF SOIL FROM THREE FORMER LAGOON AREAS THAT WERE HIGHLY CONTAMINATED WITH VOCS. THESE LAGOONS ARE IN PROXIMITY TO NUMEROUS PRIVATE WATER SUPPLY WELLS AND LESS THAN 1 MILE FROM FRENCH CREEK, WHICH IS USED FOR PUBLIC RECREATION AND FISHING. VOCS ARE BELIEVED TO ULTIMATELY DISCHARGE TO SURFACE WATERS TO THE NORTH AND EAST IN THE VILLAGE OF KIMBERTON VIA THE GROUND WATER. IN 1985, 67 RESIDENTIAL AND COMMERCIAL WELLS WERE SAMPLED AND FOUND TO CONTAIN VARIOUS CONCENTRATIONS OF TCE, DCE, AND VINYL CHLORIDE. AS A RESULT OF THESE FINDINGS, THE FORMER AND CURRENT OWNERS OF THE PLANT AGREED TO PROVIDE 23 RESIDENTIAL AND COMMERCIAL LOCATIONS WITH AN ALTERNATE SOURCE OF DRINKING AND CONTACT WATER AS AN INTERIM SOLUTION UNDER THE FIRST OPERABLE UNIT. THIS SECOND OPERABLE UNIT ADDRESSES THE CONTAMINATED PLUME AND THE SOURCE OF CONTAMINATION. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE GROUND WATER AND SURFACE WATER ARE VOCS INCLUDING TCE AND DCE.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES THE CONTINUED PROVISION OF ALTERNATE WATER SUPPLIES THROUGH GAC TREATMENT SYSTEM AND/OR POTABLE WATER SUPPLY STORAGE TANKS; PUMPING AND TREATMENT OF GROUND WATER USING AN AIR STRIPPING SYSTEM WITH ONSITE DISCHARGE TO AN ADJACENT STREAM; LONG-TERM GROUND WATER MONITORING; COLLECTION AND TREATMENT OF SURFACE WATER AT THE LOCAL GROUND WATER DISCHARGE POINT USING AN AIR STRIPPING SYSTEM; AND INSTITUTIONAL CONTROLS TO RESTRICT GROUND WATER USE. THE ESTIMATED PRESENT WORTH COST OF THIS REMEDIAL ACTION IS $2,630,000, WHICH INCLUDES ANNUAL O&M COSTS OF $175,000.
 
Remedy:  THE REMEDIAL ALTERNATIVE PRESENTED IN THIS DOCUMENT IS THE SECOND OPERABLE UNIT OF A PERMANENT REMEDY FOR THE KIMBERTON SITE. THE FIRST OPERABLE UNIT PROVIDED A RELIABLE INTERIM SOLUTION FOR THE PREVENTION OF HEALTH RISKS TO AREA RESIDENTS ASSOCIATED WITH EXPOSURE TO CONTAMINATED GROUNDWATER. THE ALTERNATIVE SELECTED FOR THE FIRST OPERABLE UNIT REQUIRED CONTINUED MONITORING AND TREATMENT OF CONTAMINATED WELLS ON AN INDIVIDUAL BASIS UNTIL A PERMANENT WATER LINE CAN BE ESTABLISHED IN THE COMMUNITY. TREATMENT CONSISTS OF FILTRATION UTILIZING GRANULAR ACTIVATED CARBON ADSORPTION. POTENTIALLY THREATENED WELLS CONTINUE TO BE MONITORED AND WILL BE PROVIDED TREATMENT IF APPROPRIATE. THE CONTAMINANT PLUME AND SOURCE OR SOURCES OF CONTAMINATION ARE THE SUBJECT OF THIS SECOND OPERABLE UNIT. PUMPING OF THE GROUNDWATER AND TREATMENT OF BOTH GROUND AND SURFACE WATER BY AIRSTRIPPING WILL BE THE FINAL REMEDIES FOR THE EFFECTIVE REMEDIATION OF THIS SITE.
 
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