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Record of Decision System (RODS)

BURLINGTON NORTHERN (BRAINERD/BAXTER PLANT)

Abstract

Site Name:  BURLINGTON NORTHERN (BRAINERD/BAXTER PLANT)
Address:  WEST CITY LIMITS 
City & State:  BRAINERD/BAXTER  MN  56401
County:  CROW WING
 
EPA ID:  MND000686196
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-86/031
ROD Date:  06/04/1986
Operable Unit(s):  01
 
Media:  GROUNDWATER SOIL
 
Contaminant:  CREOSOTE, ORGANICS, PAHS
 
Abstract:  THE BURLINGTON NORTHERN (BN) SITE IS LOCATED IN BOTH THE CITY OF BAXTER AND THE CITY OF BRAINERD, MN. THE MISSISSIPPI RIVER FLOWS ABOUT 3,000 FEET EAST OF THE PLANT AND RESIDENTIAL AREAS ARE LOCATED TO THE NORTHEAST AND SOUTHEAST, LESS THAN 1,000 FEET FROM THE SITE. SINCE 1907, BN HAS OWNED AND OPERATED THE RAILROAD TIE TREATMENT PLANT ON THIS SITE. DURING THE 1950S BN BEGAN MIXING CREOSOTE, A PRESERVER, WITH NUMBER 5 FUEL OIL IN A 1:1 RATIO. AT SOME UNDETERMINED TIME, THE MIXTURE WAS CHANGED TO CREOSOTE AND COAL TAR. THIS MIXTURE IS PRESENTLY BEING USED IN A 70:30 RATIO. WASTEWATER GENERATED FROM THE WOOD TREATING PROCESS WAS SENT TO TWO SHALLOW, UNLINED SURFACE IMPOUNDMENTS FOR DISPOSAL. THE DISCHARGE OF WASTEWATER TO THE DISPOSAL PONDS GENERATED A SLUDGE THAT CONTAMINATED BOTH THE UNDERLYING SOILS AND GROUND WATER. GROUND WATER CONTAMINATION IS RESTRICTED TO A RELATIVELY SMALL AREA DOWNGRADIENT FROM THE SITE. THE PRIMARY CONTAMINANTS OF CONCERN INCLUDE; PAHS, HETEROCYCLES, AND PHENOLS.

THE SELECTED ALTERNATIVE FOR THIS SITE CONSISTS OF ONSITE TREATMENT AND CAPPING. THE MAJOR COMPONENTS OF THE ALTERNATIVE INCLUDE; PREPARATION OF A LINED STAGING AREA FOR TEMPORARY STORAGE OF THE SLUDGE AND CONTAMINATED SOIL; REMOVAL OF ALL STANDING WATER IN THE IMPOUNDMENT; EXCAVATION OF VISIBLY CONTAMINATED SOIL FROM BOTH IMPOUNDMENTS AND SUBSEQUENT STORAGE IN THE STAGING AREA; BACKFILLING OF THE EXCAVATED AREAS; PREPARATION OF A BASE FOR THE TREATMENT AREA; INSTALLATION OF A SUMP FOR COLLECTION OF THE STORM WATER AND LEACHATE; INSTALLATION OF AN IRRIGATION SYSTEM; LAND TREATMENT OF CREOSOTE FOCUSING ON THE BREAKDOWN AND TRANSFORMATION OF ORGANIC CONSTITUENTS BY AEROBIC MICROORGANISMS IN THE TOP LAYER OF SOIL, AND THE IMMOBILIZATION OF ORGANIC AND INORGANIC CONSTITUENTS ON THE SOIL. THE FINAL GOAL OF THIS TREATMENT IS NOT THE COMPLETE DEGRADATION OF ALL WASTE CONSTITUENTS, BUT IS RATHER THE TRANSFORMATION AND IMMOBILIZATION OF THESE CONSTITUENTS TO RENDER SOIL THAT IS NO LONGER TOXIC AND DOES NOT LEACH HARMFUL CONSTITUENTS. A FINAL RCRA APPROVED COVER WILL BE INSTALLED FOLLOWING THE TREATMENT PROCESS. THE ESTIMATED CAPITAL COST FOR THIS REMEDY IS $582,000 WITH ANNUAL O&M COSTS OF $36,000.
 
Remedy:  THE SELECTED ALTERNATIVE IS ON-SITE TREATMENT, PLUS CAPPING, WHICH INCLUDES THE FOLLOWING MAJOR COMPONENTS:

- PREPARATION OF LINED STAGING AREA FOR TEMPORARY STORAGE OF THE SLUDGE AND CONTAMINATED SOIL.
- REMOVAL OF ALL STANDING WATER IN THE IMPOUNDMENT.
- EXCAVATION AND SEGREGATION OF THE SLUDGES FOR SUBSEQUENT FREE OIL RECOVERY.
- EXCAVATION OF VISIBLY CONTAMINATED SOIL FROM BOTH IMPOUNDMENTS AND SUBSEQUENT STORAGE IN THE STAGING AREA. THE EXCAVATION AREAS WILL BE BACKFILLED AND COVERED.
- PREPARATION OF A BASE FOR TREATMENT AREA CONSISTING OF 4 FEET OF CLEAN BACKFILL WITH ON-SITE SOILS, A 100-MIL HIGH DENSITY POLYETHYLENE (HDPE) LINER, A LEACHATE COLLECTION SYSTEM, AND 4 FEET OF CLEAN BACKFILL CONSISTING OF ON-SITE SOILS (FINE SANDS).
- INSTALLATION OF A SUMP FOR COLLECTION OF THE STORM WATER AND LEACHATE.
- INSTALLATION OF AN IRRIGATION SYSTEM.
- THE LAND TREATMENT OF CREOSOTE FOCUSES ON THE BREAKDOWN AND TRANSFORMATION OF ORGANIC CONSTITUENTS BY AEROBIC MICROORGANISMS IN THE TOP LAYER OF SOIL, AND THE IMMOBILIZATION OF ORGANICS AND INORGANICS CONSTITUENTS ON THE SOIL. THE FINAL GOAL OF THIS
TREATMENT IS NOT THE COMPLETE DEGRADATION OF ALL WASTE CONSTITUENTS, BUT IS RATHER THE TRANSFORMATION AND IMMOBILIZATION OF THESE CONSTITUENTS TO RENDER SOIL THAT IS NO LONGER TOXIC AND DOES NOT LEACH HARMFUL CONSTITUENTS. THE ESTIMATED TIME TO PROCESS THE CONTAMINATED MATERIALS IS 6 YEARS.
- AFTER THE TREATMENT PROCESS HAS BEEN COMPLETED, A FINAL RCRA APPROVED COVER WILL BE INSTALLED.
 
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