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Record of Decision System (RODS)

REILLY TAR & CHEMICAL CORP. (ST. LOUIS PARK PLANT)

Abstract

Site Name:  REILLY TAR & CHEMICAL CORP. (ST. LOUIS PARK PLANT)
Address:  LOUISIANA & WALKER STREET 
City & State:  ST. LOUIS PARK  MN  55426
County:  HENNEPIN
 
EPA ID:  MND980609804
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-86/038
ROD Date:  05/30/1986
Operable Unit(s):  02
 
Media:  GROUNDWATER SOILS SURFACE WATER WETLANDS
 
Contaminant:  PAHS, PHENOLS, VOCS
 
Abstract:  THE REILLY TAR AND CHEMICAL CORPORATION (RTCC) SITE OCCUPIES 80 ACRES IN ST. LOUIS PARK, MINNESOTA. THE REPUBLIC CREOSOTE WORKS, WHICH OPERATED THE SITE BETWEEN 1917 AND 1972, FRACTIONALIZED COAL TAR INTO VARIOUS OILS AND PRODUCED CREOSOTE. THE WASTES RESULTING FROM THIS PROCESS POLLUTED THE LAND SURFACE OF THE SITE AND THE UNDERLYING AQUIFERS. THE PRIMARY CONTAMINANTS OF CONCERN INCLUDE; PAHS AND PHENOLS.

THE REMEDIAL ACTION PLAN (RAP) ATTACHED TO THE CONSENT DECREE PRESCRIBES THE FOLLOWING REMEDIAL ACTIONS, REMEDIAL INVESTIGATIONS AND FEASIBILITY STUDIES TO BE COMPLETED OVER THE NEXT FIVE YEARS; RESTORATION OF DRINKING WATER SUPPLY AND WATER QUALITY BY CONSTRUCTION OF A GRANULAR ACTIVATED CARBON (GAC) SYSTEM AT ST. LOUIS PARK WELLS (SLP 15/10). THIS TASK HAS BEEN COMPLETED BY THE RTCC AND IS IN THE START-UP PROCESS; MONITORING AND CONTINGENCY TREATMENT OF THE MT. SIMON/HINCKLEY AQUIFER; MONITORING, PUMPING AND TREATMENT OF THE IRONTON/GALESVILLE AQUIFER; MONITORING, PUMPING AND TREATMENT OF THE PRAIRIE DU CHIEN/JORDAN AQUIFER UNTIL DRINKING WATER QUALITY IS UNIFORMLY ESTABLISHED WITHIN THE AREA OF GRADIENT CONTROL; MONITORING AND CONTINGENT ACTION FOR MAINTENANCE OF DRINKING WATER QUALITY IN THE ST. PETER AQUIFER; MONITORING, PUMPING AND TREATMENT OF THE DRIFT AND PLATTEVILLE AQUIFERS; MONITORING, PUMPING AND TREATMENT OF THE SOURCE MATERIAL IN THE GLACIAL DRIFT AQUIFER AND IN WELL WZ3 IN THE PRAIRIE DU CHIEN/JORDAN AQUIFER; CAPPING AND TILLING OF EXPOSED HAZARDOUS WASTES IN THE VICINITY OF THE BOG, SOUTH OF THE SITE; DISCHARGE OF HAZARDOUS WASTES TO A SANITARY SEWER FOR ANY CONTAMINATED MATERIAL EXCAVATED AND DEWATERED; FURTHER SUBSEQUENT INVESTIGATION IN THE VICINITY OF THE SITE TO IMPLEMENT DEED RESTRICTIONS FOR CURRENT AND FUTURE LAND USE IN THE AREAS OF CONTAMINATION; FURTHER RI/FS'S TO DETERMINE THE AREAL EXTENT OF, AND REMEDY FOR THE CONTAMINATION IN THE NORTHERN AREA OF THE GLACIAL DRIFT AQUIFER ADJACENT TO THE SITE; FURTHER RI/FS'S IN THE ST. PETER AQUIFER AS NECESSARY TO IMPLEMENT THE REMEDIAL ACTION PRESENTED TO PROTECT DRINKING WATER QUALITY. COST ESTIMATES FOR THESE ACTIONS HAVE NOT YET BEEN FULLY DEVELOPED.
 
Remedy:  THE REMEDIAL ACTION PLAN (RAP) ATTACHED TO THE CONSENT DECREE, PRESCRIBES THE FOLLOWING REMEDIAL ACTIONS, REMEDIAL INVESTIGATIONS AND FEASIBILITY STUDIES TO BE COMPLETED OVER THE NEXT 5 YEARS AND TO BE OPERATED UNTIL CESSATION CRITERIA ENUMERATED IN THE RAP ARE SATISFIED.

(1) RESTORATION OF DRINKING WATER SUPPLY AND WATER QUALITY BY CONSTRUCTION OF A GRANULAR ACTIVATED CARBON (GAC) SYSTEM AT ST. LOUIS PARK WELLS (SLP 15/10), IN ACCORDANCE WITH THE JUNE 6, 1984 RECORD OF DECISION. THIS TASK HAS BEEN COMPLETED BY THE REILLY TAR AND CHEMICAL CORPORATION AND IS IN THE START-UP PROCESS;
(2) MONITORING AND CONTINGENCY TREATMENT OF THE MT. SIMON/HINCKLEY AQUIFER TO MAINTAIN DRINKING WATER QUALITY;
(3) MONITORING, PUMPING AND TREATMENT OF THE IRONTON/GALESVILLE AQUIFER TO PROTECT THE DEEPER MT. SIMON/HINCKLEY AQUIFER;
(4) MONITORING, PUMPING AND TREATMENT OF THE PRAIRIE DU CHIEN/JORDAN AQUIFER UNTIL SUCH TIME THAT DRINKING WATER QUALITY IS UNIFORMLY ESTABLISHED WITHIN THE AREA OF GRADIENT CONTROL;
(5) MONITORING AND CONTINGENT ACTION FOR THE MAINTENANCE OF DRINKING WATER QUALITY IN THE ST. PETER AQUIFER;
(6) MONITORING, PUMPING AND TREATMENT OF THE DRIFT AND PLATTEVILLE AQUIFERS TO PROTECT THE DOWN GRADIENT USE OF THE AQUIFER AND THE DEEPER ST. PETER AQUIFER;
(7) MONITORING, PUMPING AND TREATMENT OF THE SOURCE MATERIAL IN THE GLACIAL DRIFT AQUIFER AND IN WELL W23 IN THE PRAIRIE DU CHIEN/JORDAN AQUIFER;
(8) CAPPING AND FILLING OF EXPOSED HAZARDOUS WASTES IN THE VICINITY OF THE BOG, SOUTH OF THE SITE, IN ACCORDANCE WITH THE U.S. FISH AND WILDLIFE AND U.S. ENVIRONMENTAL PROTECTION AGENCY REGULATIONS;
(9) DISCHARGE OF HAZARDOUS WASTES TO A SANITARY SEWER FOR ANY CONTAMINATED MATERIAL EXCAVATED AND DEWATERED FOR THE PURPOSES OF CONSTRUCTION OF AN INTERSECTION IN THE VICINITY OF THE BOG;
(10) FURTHER SUBSURFACE INVESTIGATION IN THE VICINITY OF THE SITE, TO IMPLEMENT DEED RESTRICTIONS FOR CURRENT AND FUTURE LAND USE IN THE AREAS OF CONTAMINATION;
(11) FURTHER REMEDIAL INVESTIGATIONS/FEASIBILITY STUDIES TO DETERMINE THE AREAL EXTENT OF, AND REMEDY FOR THE CONTAMINATION IN THE NORTHERN AREA OF THE GLACIAL DRIFT AQUIFER ADJACENT TO THE SITE; AND
(12) FURTHER REMEDIAL INVESTIGATION AND/OR FEASIBILITY STUDIES IN THE ST. PETER AQUIFER AS NECESSARY TO IMPLEMENT THE REMEDIAL ACTION PRESCRIBED TO PROTECT DRINKING WATER QUALITY.

ALL OF THE ABOVE ACTIONS WILL BE IMPLEMENTED IN ACCORDANCE WITH THE RELEVANT ENVIRONMENTAL LAWS AND REGULATIONS. CESSATION OF THE ABOVE ACTIONS WILL BE DECIDED BY THE REGIONAL ADMINISTRATOR BASED ON CRITERIA ALREADY ESTABLISHED OR ON CRITERIA THAT MAY BE PROPOSED IN THE FUTURE.

ENFORCEMENT DECISION DOCUMENT REMEDIAL ALTERNATIVE SELECTION
 
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