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Record of Decision System (RODS)

NATIONAL PRESTO INDUSTRIES, INC.

Abstract

Site Name:  NATIONAL PRESTO INDUSTRIES, INC.
Address:  3925 N HASTINGS WAY 
City & State:  EAU CLAIRE  WI  54701
County:  CHIPPEWA
 
EPA ID:  WID006196174
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-91/180
ROD Date:  09/30/1991
Operable Unit(s):  01
 
Media:  GROUNDWATER
 
Contaminant:  VOCS, PCE, TCA, TCE
 
Abstract:  THE 325-ACRE NATIONAL PRESTO INDUSTRIES SITE IS A FORMER MUNITIONS AND METAL-WORKING FACILITY IN EAU CLAIRE, CHIPPEWA COUNTY, WISCONSIN, ADJACENT TO THE TOWN OF HALLIE. SURROUNDING LAND USE IS LIGHT RESIDENTIAL AND COMMERCIAL, AND THE CHIPPEWA RIVER IS LOCATED APPROXIMATELY 2 MILES NORTH AND WEST OF THE SITE. LAKE HALLIE IS LOCATED APPROXIMATELY 1 MILE NORTH OF THE SITE. THE SITE OVERLIES A BURIED PRE-GLACIAL VALLEY THAT SERVES AS A PRIMARY SOURCE OF DRINKING WATER. FROM 1942 UNTIL 1945, THE SITE WAS A GOVERNMENT-OWNED, CONTRACTOR-OPERATED PRODUCER OF GUNPOWDER, SMALL ARMS, AND RADAR TUBES. THE SITE WAS OWNED BY NATIONAL PRESTO INDUSTRIES (NPI) SINCE 1948. INITIALLY NPI MANUFACTURED COOKWARE AND CONSUMER PRODUCTS, AND GENERATED WASTE STREAMS CONSISTING OF METALS, OILS, GREASE, AND SPENT SOLVENTS DURING OPERATIONS. ALSO, BEGINNING IN 1951, ARTILLERY SHELL FUSES AND AIRCRAFT PARTS WERE PRODUCED BY NPI UNDER MILITARY CONTRACTS. METAL PROJECTILES PRODUCTION BEGAN IN 1954 UNDER SEPARATE CONTRACTS. EARLY WASTE-HANDLING PRACTICES INCLUDED THE USE OF DRY WELLS AND SEEPAGE PITS WITH OVERFLOW FROM THE PITS DISCHARGED TO A FORMER SAND AND GRAVEL PIT VIA GRAVITY FLOW. WASTES ALSO WERE DISCHARGED DIRECTLY TO THE SAND AND GRAVEL PIT. DURING THE 1960'S, 3 ADDITIONAL LAGOONS WERE CONSTRUCTED AS PERCOLATION PONDS WITH THE FORMER SAND AND GRAVEL PIT SERVING AS A SETTLING POND. A MAJOR WASTE STREAM GENERATED FROM THE DEFENSE-RELATED ACTIVITIES WAS A SPENT FORGE COMPOUND, COMPOSED OF MINERAL OIL, GRAPHITE, VOCS, AND ASPHALT, WHICH ACCOUNTS FOR MUCH OF THE SLUDGE IN THE BOTTOM OF ONE OF THE SETTLING PONDS. FROM 1966 TO 1969, THE SPENT FORGE COMPOUND ALSO WAS LANDFILLED ONSITE. SUBSEQUENTLY, THE SPENT FORGE COMPOUND WAS RECYCLED AS PART OF THE MANUFACTURING PROCESS. BASED ON THEIR INVESTIGATIONS, EPA REQUIRED NPI TO PROVIDE BOTTLED WATER TO AN AREA IN HALLIE WHERE PRIVATE WELLS WERE CONTAMINATED OR THREATENED BY CONTAMINATION FROM CONFIRMED ONSITE SOURCES. A 1990 RECORD OF DECISION (ROD) PROVIDED A PERMANENT ALTERNATE WATER SUPPLY IN THE FORM OF HOOKUPS OF AFFECTED RESIDENTS AND BUSINESSES TO MUNICIPAL DISTRIBUTION SYSTEMS. FURTHER INVESTIGATIONS BY EPA HELPED DETERMINE THE PRESENCE OF FOUR MAJOR CONTAMINANTS MIGRATING FROM THE NPI SITE. THIS ROD ADDRESSES MANAGEMENT OF MIGRATION AS AN INTERIM REMEDY. A SUBSEQUENT ROD WILL ADDRESS FINAL REMEDIES FOR BOTH ONSITE SOURCE CONTROL AND GROUND WATER. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE GROUND WATER ARE VOCS INCLUDING PCE, TCA, AND TCE.

THE SELECTED REMEDIAL ACTION FOR THIS INTERIM REMEDY INCLUDES ONSITE PUMPING AND TREATMENT OF GROUND WATER USING TWO CASCADE AERATION UNITS; DISCHARGING THE TREATED WATER TO ONSITE STORM SEWERS FOR TRANSPORT TO SURFACE WATER; CONDUCTING FURTHER STUDIES TO DETERMINE THE NEED FOR PRETREATMENT OF GROUND WATER; INSTALLING A DEDICATED PIPE SYSTEM FOR SURFACE WATER DISCHARGE IF THE STORM SEWER SYSTEM CANNOT BE UTILIZED; AND CONDUCTING LONG-TERM GROUND WATER MONITORING. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $1,290,000, WHICH INCLUDES AN ANNUAL O&M COST OF $163,000 FOR YEARS 0-1 AND $104,000 FOR YEARS 2-30.

PERFORMANCE STANDARDS OR GOALS; TREATED WATER MUST MEET THE REQUIREMENTS OF CWA AMBIENT WATER QUALITY CRITERIA AND STATE STANDARDS FOR DISCHARGE TO SURFACE WATER. CHEMICAL-SPECIFIC GOALS ARE NOT PROVIDED, BUT WILL BE DEVELOPED AS PART OF SUBSEQUENT INVESTIGATIONS.
 
Remedy:  THIS INTERIM ACTION IS LIMITED TO AN OPERABLE UNIT THAT ADDRESSES CONTAMINATED GROUNDWATER THROUGH PLUM CONTAINMENT BY MEANS OF GROUNDWATER EXTRACTION AND TREATMENT. UNDER THIS INTERIM ACTION, CONTAMINATED GROUND WATER WILL BE REMOVED AT ON-SITE SOURCE AREAS, TREATED AND DISCHARGED TO THE CHIPPEWA RIVER.

THE SPECIFIC COMPONENTS OF THE REMEDIAL ACTION INCLUDE;
* INSTALLATION AND OPERATION OF GROUNDWATER EXTRACTION WELLS AT HE MELBY ROAD DISPOSAL AREA AND THE SOUTHWESTERN PORTION OF THE SITE DOWNGRADIENT OF LAGOON NO. 1 AND DITCH NO. 3;
* TREATMENT OF EXTRACTED GROUNDWATER BY CASCADE AERATION COMPRISING TWO 9-FOOT CONCRETE STEP STRUCTURES CONSTRUCTED ON SITE. ONE UNIT WILL TREAT GROUNDWATER EXTRACTED AT THE MELBY ROAD DISPOSAL AREA AND THE SECOND UNIT WILL TREAT GROUNDWATER EXTRACTED AT THE SOUTHWESTERN PORTION OF THE SITE;
* DISCHARGE OF TREATED GROUNDWATER TO THE CITY OF EAU CLAIRE STORM SEWER SYSTEM FOR TRANSPORT TO THE CHIPPEWA RIVER;
* LONG-TERM MONITORING TO MEASURE PROGRESS AND PERFORMANCE OF THE GROUNDWATER EXTRACTION SYSTEM, VERIFY COMPLETENESS OF CONTAMINANT PLUME CAPTURE, DETERMINE THE NEED FOR ADDITIONAL TREATMENT OF EXTRACTED GROUNDWATER AND MONITOR COMPLIANCE WITH WPDES PERMIT REQUIREMENTS; AND
* PROVISION FOR INSTALLATION OF DEDICATED PIPE FROM THE NPI SITE TO LAKE HALLIE OR THE CHIPPEWA RIVER SHOULD FUTURE USE OF THE EAU CLAIRE STORM SEWER SYSTEM BE PRECLUDED OR SUFFICIENTLY RESTRICTIVE THUS JEOPARDIZING THE ABILITY OF THIS INTERIM ACTION TO PREVENT OFF-SITE MOVEMENT OF CONTAMINATED GROUNDWATER.
 
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