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Record of Decision System (RODS)

HAGEN FARM

Abstract

Site Name:  HAGEN FARM
Address:  2318 COUNTY TRUNK HIGHWAY A 
City & State:  STOUGHTON  WI  53589
County:  DANE
 
EPA ID:  WID980610059
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-90/127
ROD Date:  09/17/1990
Operable Unit(s):  01
 
Media:  SOIL WASTE REFUSE
 
Contaminant:  VOCS, BENZENE, TOLUENE, XYLENES, OTHER ORGANICS, PHENOLS, PCBS
 
Abstract:  THE 10-ACRE HAGEN FARM SITE IS A FORMER WASTE DISPOSAL FACILITY IN DADE COUNTY, WISCONSIN. THIS SITE IS IN A RURAL AREA THAT IS DOMINATED BY SAND AND GRAVEL MINING AND AGRICULTURAL ACTIVITIES. FROM 1950 TO 1966, WASTE MATERIALS WERE DISPOSED OF IN THREE SUBAREAS OF THE SITE'S DEFINED AREA OF CONTAMINATION. ONSITE INVESTIGATIONS INDICATE THAT SUBAREA A, A 6-ACRE AREA IN THE SOUTHERN PORTION OF THE SITE, CONTAINS INDUSTRIAL WASTES CONSISTING OF SOLVENTS AND VARIOUS OTHER ORGANICS AS WELL AS MUNICIPAL WASTE, WHEREAS SUBAREAS B AND C, EACH 1.5-ACRE AREAS IN THE NORTHEASTERN PORTION OF THE SITE, APPEAR TO CONTAIN ONLY SCATTERED MUNICIPAL WASTES. SITE INVESTIGATIONS HAVE DETERMINED THE NEED FOR TWO CONCURRENT OPERABLE UNITS. THE SOURCE CONTROL OPERABLE UNIT WHICH IS DEFINED IN THIS RECORD OF DECISION (ROD), ADDRESSES THE WASTE REFUSE AND SUBSURFACE SOIL AT AREAS A, B, AND C WITH THE GOAL OF CONTROLLING THE MIGRATION OF THE WASTE REFUSE AND SUB-SOIL AND REDUCING THE VOLUME OF CONTAMINANTS FROM THE WASTE AND SUB-SOIL TO THE GROUND WATER. THE GROUND WATER OPERABLE UNIT WILL BE ADDRESSED IN A SUBSEQUENT ROD. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL AND WASTE REFUSE ARE VOCS INCLUDING BENZENE, TOLUENE, XYLENES; OTHER ORGANICS INCLUDING PHENOLS AND PCBS; AND METALS INCLUDING LEAD.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES CONSOLIDATING WASTE MATERIALS FROM DISPOSAL AREAS B AND C INTO DISPOSAL AREA A AND BACKFILLING EXCAVATED DEPRESSION AREAS WITHIN DISPOSAL AREAS B AND C WITH CLEAN SOIL, FOLLOWED BY REVEGETATION; CAPPING DISPOSAL AREA A AFTER CONSOLIDATION; TREATING 67,650 CUBIC YARDS OF WASTE AND 112,000 CUBIC YARDS OF CONTAMINATED SUB-SOIL MATERIALS IN DISPOSAL AREA A USING IN-SITU VAPOR EXTRACTION (ISVE) AND TREATING OFF-GAS EMISSIONS USING CARBON ADSORPTION, FOLLOWED BY REGENERATING THE SPENT CARBON FROM THE OFF-GAS TREATMENT PROCESS; AND IMPLEMENTING SITE ACCESS RESTRICTIONS AND INSTITUTIONAL CONTROLS INCLUDING DEED RESTRICTIONS TO PREVENT INSTALLATION OF DRINKING WATER WELLS AND TO PROTECT THE INTEGRITY OF THE CAP. THE ESTIMATED PRESENT WORTH COST FOR THE REMEDIAL ACTION IS $3,299,000 WHICH INCLUDES AN ANNUAL O&M COST OF $29,530 FOR 30 YEARS.

PERFORMANCE STANDARDS OR GOALS: THE GOAL OF THE ISVE WILL BE A 90 PERCENT REMOVAL OF THE VOCS FROM THE WASTE AND CONTAMINATED SUB-SOIL. OFF-GAS EXTRACTS FROM THE ISVE WILL BE TREATED TO MEET STATE EMISSION STANDARDS.
 
Remedy:  THIS SOURCE CONTROL OPERABLE UNIT IS THE FIRST OF TWO OPERABLE UNITS FOR THE SITE. THE SELECTED REMEDIAL ACTION FOR THIS OPERABLE UNIT ADDRESSES THE SOURCE OF CONTAMINATION BY REMEDIATION OF ON-SITE WASTES AND CONTAMINATED SUB-SURFACE SOILS.

THE MAJOR COMPONENTS OF THE SELECTED REMEDY INCLUDE;

* WITHIN THE LARGER AREA OF CONTAMINATION (AOC),CONSOLIDATION OF NONNATIVE MATERIALS FROM DISPOSAL AREAS B AND C INTO DISPOSAL AREA A WITH SUBSEQUENT BACKFILLING OF DISPOSAL AREAS B AND C WITH CLEAN SOIL MATERIAL;
* INSTALLATION OF A WDNR NR 504 SOLID WASTE CAP OVER DISPOSAL AREA A AFTER CONSOLIDATION;
* IN-SITU VAPOR EXTRACTION OF THE WASTE REFUSE AND SUB-SURFACE SOILS IN DISPOSAL AREA A;
* OFF-GAS TREATMENT THROUGH CARBON ADSORPTION;
* REGENERATION OF CARBON FROM THE OFF-GAS TREATMENT;
* INSTALLATION AND MAINTENANCE OF A FENCE AROUND DISPOSAL AREAS A,B,AND C DURING REMEDIAL ACTIVITIES; AND
* DEED AND ACCESS RESTRICTIONS TO PREVENT INSTALLATION OF DRINKING WATER WELLS WITHIN VICINITY OF THE DISPOSAL AREAS AND TO PROTECT THE CAP.

THE FOLLOWING COMPONENT OF THE SELECTED REMEDY WILL BE EVALUATED DURING THE IMPLEMENTATION OF IN-SITU VAPOR EXTRACTION;

* DETERMINATION OF THE OPTIMUM AMOUNT OF ESSENTIAL NUTRIENTS (E.G., MOISTURE, NITROGEN, OXYGEN, AND PHOSPHATE) TO BE ADDED TO THE WASTE REFUSE AND SUB-SURFACE SOILS IN ORDER TO PROMOTE NATURAL MICROBIAL ACTIVITIES, WITHOUT DECREASING THE MASS REMOVAL OF THE VOLATILE ORGANIC COMPOUNDS THROUGH IN-SITU VAPOR EXTRACTION.
 
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