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Record of Decision System (RODS)

NEW BRIGHTON/ARDEN HILLS/TCAAP (USARMY)

Abstract

Site Name:  NEW BRIGHTON/ARDEN HILLS/TCAAP (USARMY)
Address:  JCT HWY 10 & MN HWY 96S 
City & State:  NEW BRIGHTON  MN  55112
County:  RAMSEY
 
EPA ID:  MN7213820908
EPA Region:  05
 
NPL Status:  Currently on the Final NPL
 
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R05-83/005
ROD Date:  06/24/1983
Operable Unit(s):  01
 
Media:  GROUNDWATER
 
Contaminant:  SOLVENTS, TCE, VOCS
 
Abstract:  THE MUNICIPAL DRINKING WATER WELLS IN THE CITY OF NEW BRIGHTON/ARDEN HILLS WERE FOUND TO BE CONTAMINATED WITH VOLATILE ORGANIC SOLVENTS IN JUNE 1981. THE CITY OPENED TWO NEW WELLS IN 1982 TO REACH A LOWER NON-CONTAMINATED WATER AQUIFER. SINCE DISCOVERY OF THE CONTAMINATION, THE LEVELS OF HAZARDOUS SUBSTANCES HAVE INCREASED IN THE REMAINING UNDEEPENED MUNICIPAL WELLS. THE CITY IS PRESENTLY DRILLING TWO ADDITIONAL DEEPER WELLS. HOWEVER, THESE NEW WELLS WILL NOT BE AVAILABLE UNTIL THE END OF THE YEAR. DESPITE WATER RESTRICTIONS, ANTICIPATED SUMMERTIME PEAK DEMANDS FOR WATER WILL NOT BE MET WITHOUT DRAWING WATER FROM CONTAMINATED WELLS.

THE COST-EFFECTIVE INITIAL REMEDIAL MEASURE (IRM) SELECTED FOR THIS SITE IS TREATMENT OF THE NEW BRIGHTON/ARDEN HILLS WELLS #5 AND #6 WITH ACTIVATED CARBON TO MEET ANTICIPATED PEAK SUMMERTIME DEMANDS. THE CAPITAL COST FOR THIS IRM IS ESTIMATED TO BE $150,400 AND O&M COSTS ARE $30,526 FOR FOUR MONTHS.
 
Remedy:  - INTERIM WATER TREATMENT SYSTEM FOR THE CITY OF NEW BRIGHTON WELLS #5 AND #6 FOR PEAK DEMAND PERIODS FOR THE SUMMER USING GRANULAR ACTIVATED CARBON (PROJECT DURATION 4 MONTHS).
 
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