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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/R03-88/061
ROD Date:  09/30/1988
Operable Unit(s):  01
 
Media:  VOCS DCE TCE VINYL CHLORIDE
 
Contaminant:  GROUNDWATER
 
Abstract:  THE KIMBERTON SITE IS LOCATED IN THE NORTHEASTERN PORTION OF CHESTER COUNTY, PENNSYLVANIA, NEAR THE PHILADELPHIA METROPOLITAN AREA. THE SITE ENCOMPASSES THE MONSEY PRODUCTS COMPANY PROPERTY AND ADJACENT PROPERTIES WITHIN THE SURROUNDING VILLAGE OF KIMBERTON. SEVERAL BURIED LAGOONS ARE LOCATED ON THE SITE. THE LAGOONS ARE IN CLOSE PROXIMITY TO NUMEROUS PRIVATE WATER SUPPLY WELLS AND LESS THAN ONE MILE FROM FRENCH CREEK, WHICH IS USED FOR PUBLIC RECREATION AND FISHING. THE SITE HAD TWO SUCCESSIVE OWNERS BEFORE MONSEY PRODUCTS PURCHASED IT IN 1968. ALL OWNERS WERE INVOLVED IN INDUSTRIAL PRODUCTION. ONE OWNER, CIBA PRODUCTS COMPANY, A PREDECESSOR OF CIBA-GEIGY, OPERATED EIGHT LAGOONS AT THE SITE DURING ITS PERIOD OF OWNERSHIP FROM 1947 TO 1959. THE LAGOONS RECEIVED VARIOUS RESIDUES FROM THE MANUFACTURING OPERATIONS AT THE TIME. IN AUGUST 1981, VOCS WERE FIRST DETECTED DURING ROUTINE WATER QUALITY TESTING OF A PRIVATE WELL ON MONSEY PROPERTY. EPA'S SUBSEQUENT INVESTIGATION IN EARLY 1982 INDICATED THAT SOIL, GROUND WATER, AND SURFACE WATER WERE CONTAMINATED BY VOCS, INCLUDING DCE, TCE AND VINYL CHLORIDE. THE LAGOONS WERE IDENTIFIED AS A SOURCE OF CONTAMINATION, AND SUBSEQUENTLY, APPROXIMATELY 2,050 YD(3) OF CONTAMINATED SOIL FROM THREE FORMER LAGOON AREAS WERE EXCAVATED AND DISPOSED OF OFFSITE IN SEPTEMBER 1984 AS PART OF A SITE REMEDIAL ACTION PLAN. THE EXCAVATIONS WERE BACKFILLED, REGRADED, AND REVEGETATED. FURTHERMORE, IN DECEMBER 1986, CIBA-GEIGY AND MONSEY PRODUCTS PROVIDED 25 RESIDENTIAL AND COMMERCIAL LOCATIONS WITH AN ALTERNATE SOURCE OF DRINKING AND CONTACT WATER. CURRENTLY, SAMPLING AND ANALYSIS HAS OR CURRENTLY IS BEING PERFORMED IN OTHER LAGOON AREAS TO EVALUATE THEIR POTENTIAL AS SOURCES OF GROUND WATER CONTAMINATION. THIS REMEDIAL ACTION WAS DESIGNED TO ADDRESS THE HEALTH RISK TO THOSE RESIDENTS WHO MAY CONTINUE TO USE CONTAMINATED PRIVATE WELLS. A SUBSEQUENT ROD WILL ADDRESS OTHER SOURCES OF CONTAMINATION AS WELL AS ADDITIONAL GROUND WATER REMEDIATION. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE GROUND WATER ARE VOCS INCLUDING DCE, TCE AND VINYL CHLORIDE.


THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES; CONTINUED PROVISION OF AN ALTERNATE WATER SUPPLY -- EITHER BY TREATING IMPACTED RESIDENTIAL AND COMMERCIAL WELLS BY FILTRATION USING GRANULAR ACTIVATED CARBON ADSORPTION OR BY PROVIDING BELOW-GRADE STORAGE TANKS FOR ALL WATER NEEDS (CONTACT AND DRINKING USE); AND CONTINUED MONITORING OF IMPACTED WELLS. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $3,850,000 WITH ESTIMATED ANNUAL O&M COSTS OF $250,000 TO $300,000.
 
Remedy:  THE REMEDIAL ALTERNATIVE PRESENTED IN THIS DOCUMENT IS THE FIRST OPERABLE UNIT OF A PERMANENT REMEDY FOR THE KIMBERTON SITE. IT WILL PROVIDE A RELIABLE INTERIM SOLUTION FOR THE PREVENTION OF HEALTH RISKS TO AREA RESIDENTS ASSOCIATED WITH EXPOSURE TO CONTAMINATED GROUNDWATER. THE ALTERNATIVE SELECTED REQUIRES CONTINUED MONITORING AND TREATMENT OF CONTAMINATED WELLS ON AN INDIVIDUAL BASIS. TREATMENT WILL CONSIST OF FILTRATION UTILIZING GRANULAR ACTIVATED CARBON ADSORPTION. POTENTIALLY THREATENED WELLS WILL ALSO CONTINUE TO BE MONITORED AND PROVIDED TREATMENT IF APPROPRIATE. THE CONTAMINANT PLUME AND SOURCE OR SOURCES OF CONTAMINATION WILL BE ADDRESSED IN A SUBSEQUENT RECORD OF DECISION.
 
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