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Record of Decision System (RODS)

AVCO LYCOMING (WILLIAMSPORT DIVISION)

Abstract

Site Name:  AVCO LYCOMING (WILLIAMSPORT DIVISION)
Address:  652 OLIVER ST 
City & State:  WILLIAMSPORT  PA  17701
County:  LYCOMING
 
EPA ID:  PAD003053709
EPA Region:  03
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-91/112
ROD Date:  06/28/1991
Operable Unit(s):  01
 
Media:  GROUNDWATER
 
Contaminant:  VOCS, TCE, METALS, CHROMIUM
 
Abstract:  THE 28-ACRE AVCO LYCOMING-WILLIAMSPORT DIVISION SITE IS AN ACTIVE MANUFACTURING FACILITY IN WILLIAMSPORT, PENNSYLVANIA. SURROUNDING LAND USE IS PRIMARILY RESIDENTIAL. THE SITE OVERLIES A SURFICIAL GLACIAL AQUIFER AND A DEEPER BEDROCK AQUIFER THAT ARE USED AS SEASONAL SOURCES OF DRINKING WATER. GROUND WATER IS PUMPED FROM THE WILLIAMSPORT MUNICIPAL WATER AUTHORITY (WMWA) WELL FIELD LOCATED 3,000 FEET SOUTH OF THE SITE. WETLANDS ARE LOCATED NEAR THE SITE IN THE 100-YEAR FLOODPLAIN OF LYCOMING CREEK AND THE SUSQUEHANNA RIVER. FROM 1929 UNTIL PRESENT, VARIOUS MANUFACTURING COMPANIES INCLUDING A BICYCLE AND SEWING MACHINE MANUFACTURING PLANT, A SANDPAPER PLANT, A TOOL AND DIE SHOP, A SILK PLANT, AND AIRCRAFT ENGINE MANUFACTURING PLANT HAVE BEEN LOCATED ONSITE. POSSIBLE SOURCES OF ONSITE CONTAMINATION INCLUDE IMPROPER WASTE DISPOSAL IN A "DRY WELL", LABORATORY CHEMICAL DISPOSAL IN A COOLANT WELL, SPILLAGE AND DUMPING IN METAL PLATING AREAS, A SLUDGE HOLDING LAGOON, CUTTING OILS FROM A METAL CHIPSTER SUMP, DEGREASING AREAS, AND CHEMICAL STORAGE AREAS. THE SITE ALSO CONTAINS APPROXIMATELY 40 UNDERGROUND STORAGE TANKS THAT ARE PRESENTLY BEING ABANDONED OR UPGRADED. IN 1984, THE STATE IDENTIFIED VOC CONTAMINATION IN THE WMWA WELL FIELD. IN 1985, MONITORING AND RECOVERY WELLS WERE INSTALLED ONSITE AND OFFSITE TO IDENTIFY THE SOURCE OF CONTAMINATION, WHICH WAS DETERMINED TO BE THE AVCO PLANT. IN 1986, THE STATE APPROVED THE AVCO REMEDIAL ACTION PLAN, WHICH INCLUDED INSTALLATION OF AN AIR STRIPPING SYSTEM TO TREAT WATER FROM THREE ONSITE AND TWO OFFSITE RECOVERY WELLS, AND DISCHARGE TO LYCOMING CREEK. THIS REMEDIAL ACTION REMAINS IN EFFECT. BETWEEN 1989 AND 1991, A RI/FS STUDY WAS CONDUCTED TO FURTHER CHARACTERIZE THE CONTAMINATION AND SOURCE AREAS. THIS RECORD OF DECISION (ROD) ADDRESSES MANAGEMENT OF MIGRATION OF CONTAMINATED GROUND WATER FROM THE ONSITE AREA. REMEDIATION OF OFFSITE GROUND WATER WILL BE ADDRESSED IN A SUBSEQUENT ROD. THE PRIMARY CONTAMINANTS OF CONCERN AFFECTING THE GROUND WATER ARE VOCS INCLUDING TCE AND METALS INCLUDING CHROMIUM.

THE SELECTED REMEDIAL ACTION FOR THIS SITE INCLUDES PUMPING AND TREATMENT OF CONTAMINATED GROUND WATER USING AN ONSITE TREATMENT FACILITY THAT UTILIZES PRECIPITATION, COAGULATION, FLOCCULATION, AND AIR STRIPPING; TREATING AIR STRIPPER OFF-GASES USING BEST AVAILABLE TECHNOLOGY (BAT), POSSIBLY GRANULAR ACTIVATED CARBON OR FUME INCINERATION; DEWATERING AND OFFSITE DISPOSAL OF RESIDUAL PRECIPITATION SLUDGE AND SPENT CARBON FILTERS; DISCHARGING TREATED WATER ONSITE TO SURFACE WATER; MONITORING GROUND WATER; AND IMPLEMENTING INSTITUTIONAL CONTROLS INCLUDING LAND USE RESTRICTIONS. THE ESTIMATED PRESENT WORTH COST FOR THIS REMEDIAL ACTION IS $9,300,000, WHICH INCLUDES AN ANNUAL O&M COST OF $442,900 FOR 30 YEARS.

PERFORMANCE STANDARDS OR GOALS; GROUND WATER CLEANUP STANDARDS ARE BASED ON THE MORE STRINGENT OF FEDERAL MCLS OR NON-ZERO MCLGS, OR BACKGROUND LEVELS. CHEMICAL-SPECIFIC GOALS WERE NOT PROVIDED.
 
Remedy:  THE REMEDIAL ACTION PLAN IN THIS DOCUMENT FOR OPERABLE UNIT 1 IS PRESENTED AS THE PERMANENT REMEDY FOR CONTAINING, RECOVERING AND TREATING THE ON SITE GROUNDWATER CONTAMINATION AT THE SITE. UNDER THIS REMEDY, GROUND WATER RECOVERY WELLS WOULD BE INSTALLED ON THE DOWNGRADIENT SIDE OF THE FACILITY TO CONTAIN CONTAMINATED GROUND WATER AND CONTROL FURTHER OFF-SITE MIGRATION. THE CONTAMINATED GROUND WATER WILL BE RECOVERED THROUGH A SERIES OF EXISTING AND NEWLY INSTALLED RECOVERY WELLS, WITH THE LONG TERM GOAL OF RETURNING THE GROUND WATER TO ITS MOST BENEFICIAL USE. THIS REMEDY ALSO PROVIDES FOR ADDITIONAL PROTECTION BY IMPLEMENTING INSTITUTIONAL CONTROLS IN THE FORM OF LIMITING FUTURE PROPERTY USE TO THOSE ACTIVITIES COMPATIBLE WITH SITE CONDITIONS.

THIS REMEDY IS FOR OPERABLE UNIT 1 AND ONLY ADDRESSES THE ON-SITE CONTAMINATED GROUNDWATER. THE OFF SITE CONTAMINATED GROUNDWATER PLUME WILL CONTINUE TO BE REMEDIATED THROUGH THE EXISTING OFF SITE RECOVERY AND TREATMENT-SYSTEMS, AS REQUIRED BY THE CONSENT ORDER AND AGREEMENT BETWEEN AVCO AND THE COMMONWEALTH OF PENNSYLVANIA. THIS OFF SITE PLUME WILL BE SPLIT OFF INTO A SEPARATE OPERABLE UNIT. ADDITIONAL STUDIES WILL BE PERFORMED ON THIS OFF-SITE OPERABLE UNIT TO DETERMINE THE MOST APPROPRIATE ACTION TO BE TAKEN BY EPA IN A FUTURE RECORD OF DECISION.
 
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