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Record of Decision System (RODS)

NORTHSIDE SANITARY LANDFILL, INC

Abstract

Site Name:  NORTHSIDE SANITARY LANDFILL, INC
Address:  985 S ST RD 421 
City & State:  ZIONSVILLE  IN  46077
County:  BOONE
 
EPA ID:  IND050530872
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Amendment
ROD ID:  EPA/AMD/R05-91/162
ROD Date:  07/31/1991
Operable Unit(s):  01
 
Media:  SOIL GROUND WATER
 
Contaminant:  VOCS, BENZENE, PCE, TCE, TOLUENE, OTHER ORGANICS, PHENOLS, METALS, ARSENIC, CHROMIUM, LEAD, OILS
 
Abstract:  THE NORTHSIDE SANITARY LANDFILL SITE IS A HAZARDOUS AND SOLID WASTE DISPOSAL FACILITY IN BOONE COUNTY, INDIANA. ADJACENT TO THE NORTHSIDE SANITARY LANDFILL (NSL) SITE IS ANOTHER SUPERFUND SITE, ENVIRO-CHEM WHICH, PRIOR TO THIS RECORD OF DECISION (ROD) AMENDMENT, WAS TO BE REMEDIATED IN A COMBINED REMEDY FOR BOTH SITES. LAND USE IN THE AREA IS AGRICULTURAL TO THE SOUTH AND EAST, AND RESIDENTIAL TO THE NORTH AND WEST, WITH APPROXIMATELY 50 RESIDENCES LOCATED WITHIN ONE MILE OF THE SITES. RUNOFF FROM THE SITES IS COLLECTED IN A DITCH, WHICH FLOWS OFFSITE AND EVENTUALLY EMPTIES INTO A RESERVOIR THAT SUPPLIES APPROXIMATELY 6 PERCENT OF THE DRINKING WATER FOR THE CITY OF INDIANAPOLIS. NSL BEGAN OPERATING AS A LANDFILL BETWEEN 1955 AND 1962. BY 1981, NSL WAS OPERATING AS A HAZARDOUS WASTE DISPOSAL FACILITY AND HAD ACCEPTED AT LEAST 16 MILLION GALLONS OF HAZARDOUS SUBSTANCES INCLUDING PAINT SLUDGE, ACIDS, SPENT ACIDS, AND WASTE OIL. THROUGHOUT ITS OPERATION HISTORY, NSL WAS ALLEGEDLY ACCEPTING AN ABUNDANCE OF UNAPPROVED WASTE FROM OFFSITE FACILITIES INCLUDING ENVIRO-CHEM, AN ADJACENT WASTE RECOVERY, RECLAMATION AND BROKERING FACILITY. ADDITIONALLY, EPA AND THE STATE CITED NSL FOR NUMEROUS OPERATIONAL DEFICIENCIES. IN 1983, NSL'S HAZARDOUS WASTE AND SOLID WASTE OPERATORS PERMITS WERE DENIED BECAUSE OF LEACHATE COLLECTION PROBLEMS, ACCEPTANCE OF UNAPPROVED WASTE, AND DEFICIENCIES IN ITS CLOSURE, POST-CLOSURE AND GROUND WATER ASSESSMENT PLANS. THE STATE THEN ORDERED NSL TO PERFORM SEVERAL REMEDIAL MEASURES INCLUDING INSTALLING A FUNCTIONING LEACHATE COLLECTION SYSTEM AROUND THE ENTIRE PERIMETER OF THE LANDFILL, INSTALLING A SLURRY WALL OR ANOTHER MEASURE TO PREVENT GROUND WATER MIGRATION, MONITORING GROUND WATER, AND TO DISCONTINUE ACCEPTANCE OF SOLID WASTE EXCEPT FOR THAT AMOUNT NEEDED TO ADEQUATELY CONTOUR THE SITE. A 1987 ROD PROVIDED A COMBINED REMEDY FOR BOTH THE NSL AND ENVIRO-CHEM SITES DUE TO THEIR PROXIMITY AND OTHER SIMILARITIES. THE 1987 ROD ADDRESSED SOURCE CONTROL CAPPING; PUMPING AND ONSITE TREATMENT OF GROUND WATER; AND IMPLEMENTING DEED AND ACCESS RESTRICTIONS. SINCE THE SIGNING OF THE ROD, EPA AND THE STATE HAVE BEEN ENGAGED IN NEGOTIATIONS WITH THE PRPS FOR EACH SITE. THESE NEGOTIATIONS HAVE RESULTED IN SEPARATE, COMPLIMENTARY REMEDIES AND INDIVIDUAL CONSENT DECREES FOR EACH SITE, AND MODIFICATIONS TO THE ORIGINAL SELECTED REMEDY. THIS ROD AMENDMENT PROVIDES A COMPREHENSIVE REMEDY AND ADDRESSES BOTH SOURCE CONTROL AND GROUND WATER REMEDIATION. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE SOIL AND GROUND WATER ARE VOCS INCLUDING BENZENE, PCE, TCE, AND TOLUENE; OTHER ORGANICS INCLUDING PHENOLS; METALS INCLUDING ARSENIC, CHROMIUM, AND LEAD; AND OILS.

THE AMENDED REMEDIAL ACTION FOR THIS SITE INCLUDES CONSTRUCTING A PIPELINE TO PUMP GROUND WATER AND LEACHATE OFFSITE TO THE CITY SEWER SYSTEM AT THE CITY WASTEWATER TREATMENT PLANT AND CONSTRUCTING A HYDRAULIC ISOLATION WALL SYSTEM SOUTH AND WEST OF NSL TO PREVENT UNCONTAMINATED GROUND WATER FROM ENTERING THE GROUND WATER LEACHATE COLLECTION TRENCH. IF FOR ANY REASON THE CITY TREATMENT PLANT CANNOT BE USED, THIS ROD AMENDMENT PROVIDES A CONTINGENCY FOR ONSITE TREATMENT OF GROUND WATER FOLLOWED BY ONSITE DISCHARGE TO SURFACE WATER AS SPECIFIED IN THE 1987 ROD; TREATMENT AT ANOTHER WASTEWATER TREATMENT PLANT; OR ANOTHER ALTERNATIVE CONSISTENT WITH THE CLEAN WATER ACT. OTHER REMEDIAL ACTIONS DOCUMENTED IN THE 1987 ROD INCLUDING CONSTRUCTING A RCRA CAP AND GAS VENTING SYSTEM; COLLECTING LEACHATE AND GROUND WATER IN A TRENCH SYSTEM; MONITORING GROUND WATER, SURFACE WATER, AND LEACHATE; AND IMPLEMENTING SITE ACCESS RESTRICTIONS ARE NOT AFFECTED BY THIS AMENDMENT. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION RANGES FROM $25,000,000 TO $30,000,000. NO O&M COSTS WERE PROVIDED FOR THIS REMEDIAL ACTION.

PERFORMANCE STANDARDS OR GOALS; CHEMICAL-SPECIFIC GROUND WATER AND LEACHATE CLEAN-UP GOALS ARE BASED ON FEDERAL AMBIENT WATER QUALITY CRITERIA (WQC) AND STATE WATER QUALITY STANDARDS (WQS), AND INCLUDE ARSENIC 0.0175 UG/L (WQS), BENZENE 40 UG/L (WQS), CHROMIUM 11 UG/L (WQS), LEAD 10 UG/L (WQS), PCE 8.85 UG/L (WQS), PHENOLS 570 UG/L (WQC), TCE 80.7 UG/L (WQS), AND TOLUENE 3,400 UG/L (WQC).
 
Remedy:  THE PRIMARY REASON FOR AMENDING THE 1987 RECORD OF DECISION IS TO REFLECT THE DECISION TO IMPLEMENT SEPARATE, COMPLEMENTARY REMEDIES FOR THE ENVIRONMENTAL CONSERVATION AND CHEMICAL CORPORATION AND NORTHSIDE SANITARY LANDFILL SITES, INSTEAD OF THE ONE COMBINED REMEDY SELECTED IN THE 1987 RECORD OF DECISION, AND SECONDARILY, TO MODIFY THE SELECTED REMEDY. FOR THE NORTHSIDE SANITARY LANDFILL SITE,

THE MAJOR COMPONENTS OF THE REMEDIAL ACTION AS MODIFIED, INCLUDE;
* ACCESS RESTRICTIONS
* RCRA SUBTITLE C CAP AND GAS VENTING SYSTEM
* HYDRAULIC ISOLATION WALL SOUTH AND WEST OF NSL AND NORTH OF FINLEY CREEK
* LEACHATE COLLECTION TRENCH NORTH, NORTHWEST AND EAST OF NSL
* COMBINED GROUNDWATER AND LEACHATE COLLECTION TRENCH SOUTH AND SOUTHWEST OF NSL
* PIPELINE TO THE INDIANAPOLIS DEPARTMENT OF PUBLIC WORKS SEWER SYSTEM, AND TREATMENT OF THE GROUNDWATER AND LEACHATE AT THE INDIANAPOLIS PUBLICLY-OWNED TREATMENT WORKS (POTW) OR ELSEWHERE IN THE EVENT THAT THE POTW IS UNAVAILABLE
* GROUNDWATER, SURFACE-WATER, AND LEACHATE MONITORING PROGRAM.
 
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