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Record of Decision System (RODS)

KUMMER SANITARY LANDFILL

Abstract

Site Name:  KUMMER SANITARY LANDFILL
Address:  ANNE ST 
City & State:  BEMIDJI  MN  56601
County:  BELTRAMI
 
EPA ID:  MND980904049
EPA Region:  05
 
NPL Status:  Deleted from the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-90/134
ROD Date:  09/29/1990
Operable Unit(s):  03
 
Media:  GROUNDWATER
 
Contaminant:  VOCS, BENZENE, PCE, TCE, VINYL CHLORIDE
 
Abstract:  THE 35-ACRE KUMMER SANITARY LANDFILL SITE IS AN INACTIVE MIXED MUNICIPAL WASTE LANDFILL IN NORTHERN TOWNSHIP, BELTRAMI COUNTY, MINNESOTA, APPROXIMATELY ONE MILE WEST OF LAKE BEMIDJI. A LARGE RESIDENTIAL AREA LIES APPROXIMATELY 1,000 FEET EAST OF THE SITE, AND THERE IS A HOSPITAL DIRECTLY SOUTHWEST. THE PRIVATELY OWNED LANDFILL WAS OPERATED FROM 1971 UNTIL 1985; HOWEVER, BUSINESS RECORDS FOR THE SITE ARE VIRTUALLY NONEXISTENT. OPERATIONS AT THE LANDFILL CAUSED THE STATE TO TAKE A NUMBER OF ADMINISTRATIVE AND ENFORCEMENT ACTIONS. FOLLOWING THE DISCOVERY OF GROUND WATER CONTAMINATION IN THE NORTHERN TOWNSHIP IN 1984, THE STATE ISSUED A PUBLIC HEALTH ADVISORY CONCERNING THE WELL WATER AND PROVIDED A TEMPORARY WATER SUPPLY. TWO PREVIOUS RECORDS OF DECISION (RODS) IN 1985 AND 1988, DOCUMENTED THE PROVISION OF AN ALTERNATIVE WATER SUPPLY FOR THE NORTHERN MUNICIPAL WATER SYSTEM AS OPERABLE UNIT 1 (OU1), AND A SOURCE CONTROL OPERABLE UNIT (OU2), WHICH INCLUDED A COVER SYSTEM TO CONTROL THE SOURCE OF CONTAMINATION (OU3). THIS FINAL ROD ADDRESSES GROUND WATER CONTAMINATION. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE GROUND WATER ARE VOCS INCLUDING BENZENE, PCE, TCE, AND VINYL CHLORIDE.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES GROUND WATER PUMPING AND TREATMENT USING ADVANCED OXIDATION PROCESSES (E.G., OZONE, HYDROGEN PEROXIDE, OR ULTRAVIOLET LIGHT), AND LIME SODA SOFTENING, AS NECESSARY, TO PRECIPITATE ALKALINITY AND OTHER INORGANIC COMPOUNDS, FOLLOWED BY DISPOSAL OF THE PRECIPITATE SLUDGE, POLISHING THE EFFLUENT STREAM WITH GRANULATED ACTIVATED CARBON, AND DISCHARGING TREATED GROUND WATER TO AN ONSITE INFILTRATION POND; AND GROUND WATER MONITORING. TREATABILITY STUDIES FOR BIOREMEDIATION AS A MORE COST-EFFECTIVE REMEDY ARE PLANNED; HOWEVER, THE ROD WILL BE AMENDED IF THE TREATMENT IS CHANGED TO BIOTREATMENT. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $1,800,000-$6,200,000, WHICH INCLUDES AN ANNUAL O&M COST OF $240,000-$510,000 FOR 30 YEARS.

PERFORMANCE STANDARDS OR GOALS; CONTAMINANTS OF CONCERN IN THE GROUND WATER WILL BE REDUCED TO MEET CURRENT AND PROPOSED MAXIMUM CONTAMINANT LEVELS (MCLS) INCLUDING PCE 5 UG/L (PROPOSED MCL), TCE 5 UG/L (MCL), AND BENZENE 5 UG/L (MCL); THEREBY, REDUCING CUMULATIVE RESIDUAL CARCINOGENIC RISK DUE TO INGESTION TO (10-6).
 
Remedy:  THIS OPERABLE UNIT IS THE FINAL ACTION OF THREE OPERABLE UNITS FOR THE SITE. THE FIRST OPERABLE UNIT AT THIS SITE INVOLVED INSTALLATION OF A MUNICIPAL DRINKING WATER SYSTEM. THE SECOND OPERABLE UNIT INVOLVED A FINAL COVER FOR THE LANDFILL. THE THIRD OPERABLE UNIT INVOLVES THE CONTAMINATED GROUNDWATER.

THE SELECTED REMEDY CONSISTS OF THE FOLLOWING COMPONENTS;

* EXTRACTION OF CONTAMINATED GROUNDWATER
* TREATMENT OF CONTAMINATED GROUNDWATER BY ADVANCED OXIDATION PROCESSES
* DISCHARGE OF TREATED GROUNDWATER USING AN INFILTRATION POND
 
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