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Air Toxics at School 2022

School Info

SchoolVarnum Brook
Street10 Hollis Street
CityPepperell
StateMA
Number of students633
Student % minority20%
TypeRegular School
Status1
LevelElementary
Data SourceCCD (public schools)

Air Toxics Info

Number of facilities affecting school119
Number of chemicals affecting school63
Toxic percentile nationwide (1=worst)64th
Toxic rank nationwide (1=worst)82,512
Toxic percentile statewide (1=worst)84th
Toxic rank statewide (1=worst)2,102
Toxic Hazard274.78

This school's air toxic concentration is 0.06 times the national average at schools.

This school's air toxic concentration is 0.28 times the state average at schools.

Top 5 facilities

FacilityParent CompanyToxic Hazard
PROTO LABS INC.PROTO LABS INC74.70
PROTO LABS INCPROTO LABS INC74.70
HITCHINER COUNTERGRAVITY CAST OPERATIONS (VCO/DCO/MCT)HITCHINER MANUFACTURING CO INC57.00
TECOMETCharlesbank Capital Partners39.36
BOYD CORP INC.Goldman Sachs5.16

(click here to expand list to all facilities)

Top 5 chemicals

ChemicalToxic Hazard
Chromium161.80
Cobalt78.92
Nickel8.21
Trichloroethylene5.16
Ethylene oxide5.00

(click here to expand list to all chemicals)

Top chemicals from facilities

FacilityParent CompanyChemicalToxic Hazard
PROTO LABS INC.PROTO LABS INCChromium74.70
PROTO LABS INCPROTO LABS INCChromium74.70
HITCHINER COUNTERGRAVITY CAST OPERATIONS (VCO/DCO/MCT)HITCHINER MANUFACTURING CO INCCobalt47.68
TECOMETCharlesbank Capital PartnersCobalt31.23
TECOMETCharlesbank Capital PartnersChromium7.96
HITCHINER COUNTERGRAVITY CAST OPERATIONS (VCO/DCO/MCT)HITCHINER MANUFACTURING CO INCNickel7.13
BOYD CORP INC.Goldman SachsTrichloroethylene5.16
ISOMEDIX OPERATIONS INC.STERISEthylene oxide5.00
PACE INDUSTRIES - CAMBRIDGE DIVPace IndustriesLead 3.10
PARKER HANNIFIN CORP CHOMERICS DIVParker-HannifinNickel compounds2.45
HITCHINER COUNTERGRAVITY CAST OPERATIONS (VCO/DCO/MCT)HITCHINER MANUFACTURING CO INCChromium2.20
CHROMA COLOR CORPArsenal Capital PartnersChromium compounds (except for chromite ore mined in the Transvaal Region of South Africa and the unreacted ore component of the chromite ore processing residue (COPR). COPR is the solid waste remaining after aqueous extraction of oxidized chromite ore that has been combined with soda ash and kiln roasted at approximately 2,000 F.) 2.08
AVIENT COLORANTS USA LLC - HOLDEN FACILITYAvient CorporationChromium compounds (except for chromite ore mined in the Transvaal Region of South Africa and the unreacted ore component of the chromite ore processing residue (COPR). COPR is the solid waste remaining after aqueous extraction of oxidized chromite ore that has been combined with soda ash and kiln roasted at approximately 2,000 F.) 2.05
INNER-TITE CORP.INNER-TITE CORP.Chromium1.20
LUBRIZOL ADVANCED MATERIALS INCBerkshire HathawayDiisocyanates1.06
CHEMGENES CORPCHEMGENES CORPChloroform0.88
AMPHENOL APC INCAmphenolFormaldehyde0.77
WORTHEN INDUSTRIES INC UPACO DIVWorthen IndustriesDiisocyanates0.69
COORSTEK IGNITER PRODUCTSCOORSTEK INCNickel0.62
ADVANCE COATINGS COADVANCE COATINGS COMaleic anhydride0.58
KOMTEK FORGE LLCCrawford UnitedChromium0.57
ADVANCE COATINGS COADVANCE COATINGS CODicyclopentadiene0.49
METSO AUTOMATION USA INCValmet OyjChromium0.48
KOMTEK FORGE LLCCrawford UnitedNickel0.28
MEXICHEM SPECIALTY COMPOUNDSOrbia Advance CorporationAntimony compounds0.22
PACE INDUSTRIES - CAMBRIDGE DIVPace IndustriesZinc compounds0.22
TECOMETCharlesbank Capital PartnersNickel0.16
ENTEGRIS INCEntegrisDi(2-ethylhexyl) phthalate0.14
NYACOL NANOTECHNOLOGIES INCNYACOL NANOTECHNOLOGIES INCAntimony compounds0.14
COLT REFINING INCCOLT REFINING INCLead 0.08
BENCHMARK ELECTRONICS NH DIVBenchmark ElectronicsLead 0.07
S&E SPECIALTY POLYMERS LLCNautic PartnersAntimony compounds0.07
OMNOVA SOLUTIONSSynthomerAcrylonitrile0.06
HOLCIM - NER INC.Holcim GroupPolycyclic aromatic compounds0.06
NEWARK AMERICAGreif Inc.Peracetic acid0.06
HARCROS CHEMICALS INCHarcros ChemicalsNitric acid0.05
VERANOVA L.P.Altaris Capital PartnersDichloromethane (Methylene chloride)0.04
WORTHEN INDUSTRIES INC UPACO DIVWorthen IndustriesAntimony compounds0.03
ALLCOAT TECHNOLOGY INCALLCOAT TECHNOLOGY INCDiisocyanates0.03
SPECIALTY MATERIALS INC.Global MaterialsHydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)0.02
AVCARB MATERIAL SOLUTIONSArsenal Capital PartnersHydrogen cyanide0.02
WORTHEN INDUSTRIES INC UPACO DIVWorthen IndustriesToluene diisocyanate (mixed isomers)0.02
MAJILITE MANUFACTURING INCMERIDIAN INDUSTRIES INCN,N-Dimethylformamide0.02
ANALOG DEVICES INC/WILMINGTON MANUFACTURINGAnalog Devices Inc.Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)0.02
METSO AUTOMATION USA INCValmet OyjNickel0.02
INTERVALA LLCIntervalaLead compounds0.01
EMD MILLIPORE CORPMerck KGaA (EMD)Dichloromethane (Methylene chloride)0.01
AMPHENOL APC INCAmphenolCertain glycol ethers0.01
AMPHENOL APC INCAmphenolSulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)0.01
CIRCUIT CONNECT INCInfinitumAmmonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing)0.01
IDEAL TAPE COAmerican BiltriteToluene0.01
PARKER HANNIFIN CORP CHOMERICS DIVParker-HannifinCopper0.01
COVESTRO LLCCovestroTriethylamine0.01
PACE INDUSTRIES - CAMBRIDGE DIVPace IndustriesCopper0.01
ALLCOAT TECHNOLOGY INCALLCOAT TECHNOLOGY INCToluene diisocyanate (mixed isomers)0.01
BRADFORD INDUSTRIESWembly EnterprisesN,N-Dimethylformamide0.01
BRONZE CRAFT CORPBRONZE CRAFT CORPCopper0.01
OMNOVA SOLUTIONSSynthomerButyl acrylate0.01
ANALOG DEVICES INC/WILMINGTON MANUFACTURINGAnalog Devices Inc.Hydrogen fluoride (Hydrofluoric acid)0.00
HOLLINGSWORTH & VOSE CO WEST GROTONHOLLINGSWORTH & VOSE COAmmonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing)0.00
WORTHEN INDUSTRIESWorthen IndustriesToluene0.00
VERANOVA L.P.Altaris Capital PartnersMethyl tert-butyl ether0.00
S&E SPECIALTY POLYMERS LLCNautic PartnersBarium compounds (except for barium sulfate (CAS No. 7727-43-7))0.00
HOLCIM - NER INC.Holcim GroupPolycyclic aromatic compounds0.00
UNIVAR SOLUTIONS USA INC. - TEWKSBURY MAApollo Global ManagementN,N-Dimethylformamide0.00
SEAMAN PAPER CO. OF MASSACHUSETTS INC.SEAMAN PAPER CO. OF MASSACHUSETTS INC.Polycyclic aromatic compounds0.00
INTERNATIONAL RECTIFIER HIREL PRODUCTS INC.Infineon TechnologiesLead 0.00
AMERICAN SUPERCONDUCTORAmerican Superconductor Corp.Lead compounds0.00
BOSTIK MANUFACTURING PLANTArkemaAntimony compounds0.00
MORGAN ADVANCED CERAMICS INCMorgan Advanced MaterialsHydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)0.00
ADVANCE COATINGS COADVANCE COATINGS COPhthalic anhydride0.00
EDWARDS VACUUM LLCAtlas CopcoLead 0.00
MARMON UTILITY LLCBerkshire HathawayCopper0.00
STRAUMANN MANUFACTURING INCSTRAUMANN MANUFACTURING INCn-Hexane (Hexane)0.00
BAE SYSTEMS INFORMATION & ELECTRONIC SYSTEMS INTEGRATIONBAE SystemsLead 0.00
TORROMEO INDUSTRIES INCTORROMEO INDUSTRIES INCLead compounds0.00
PANDOLF PERKINS COEH PERKINS CONSTRUCTION INCPolycyclic aromatic compounds0.00
ICP CONSTRUCTIONCPC HOLDING LLCEthylene glycol0.00
BENEVENTO SAND & STONE CORPBENEVENTO SAND & STONE CORPPolycyclic aromatic compounds0.00
WORTHEN INDUSTRIES INC UPACO DIVWorthen IndustriesN,N-Dimethylformamide0.00
TORROMEO INDUSTRIES INC.TORROMEO INDUSTRIES INCLead compounds0.00
BROX INDUSTRIES INCBrox IndustriesLead 0.00
SAINT-GOBAIN ABRASIVES & SAINT -GOBAIN CERAMICS & PLASTICSSaint-GobainLead compounds0.00
HAARTZ CORPHAARTZ CORPo-Xylene0.00
IDEAL TAPE COAmerican Biltriten-Hexane (Hexane)0.00
JG MACLELLAN CONCRETE CO INCJG MACLELLAN CONCRETE CO INCLead compounds0.00
COVESTRO LLCCovestroDiisocyanates0.00
LGC STANDARDS VHG LABSLGC STANDARDS VHG LABSLead 0.00
PARKER HANNIFIN CORP CHOMERICS DIVParker-HannifinSilver compounds0.00
VICOR CORPVicor Corp.Copper0.00
AMPHENOL APC INCAmphenolHydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)0.00
ANALOG DEVICES INC/WILMINGTON MANUFACTURINGAnalog Devices Inc.Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)0.00
SAINT-GOBAIN ABRASIVES & SAINT -GOBAIN CERAMICS & PLASTICSSaint-GobainAmmonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing)0.00
ROHM & HAAS ELECTRONIC MATERIALS LLCDuPont de NemoursFormaldehyde0.00
AMPHENOL APC INCAmphenolNitric acid0.00
ADVANCE COATINGS COADVANCE COATINGS COStyrene0.00
COVESTRO LLCCovestroToluene-2,4-diisocyanate0.00
SAINT-GOBAIN ABRASIVES & SAINT -GOBAIN CERAMICS & PLASTICSSaint-GobainPhenol0.00
HOOKSETT CRUSHED STONE PIKE INDUSTRIES INCCRH PLCPolycyclic aromatic compounds0.00
COLT REFINING INCCOLT REFINING INCCopper0.00
CIRTRONICS CORPCIRTRONICS CORPLead 0.00
TEKNOR APEX ELASTOMERS INC.TEKNOR APEXZinc compounds0.00
L3 TECHNOLOGIES INC.L3Harris TechnologiesLead 0.00
GRANITE STATE CONCRETE CO INC WESTFORDJG MACLELLAN CONCRETE CO INCLead compounds0.00
NYACOL NANOTECHNOLOGIES INCNYACOL NANOTECHNOLOGIES INCLead compounds0.00
TECOMETCharlesbank Capital PartnersManganese0.00
WORTHEN INDUSTRIES INC UPACO DIVWorthen Industriesn-Hexane (Hexane)0.00
HIGHLINE WARREN LLCPritzker GroupMethanol0.00
MEXICHEM SPECIALTY COMPOUNDSOrbia Advance CorporationLead compounds0.00
WORTHEN INDUSTRIES INC UPACO DIVWorthen IndustriesXylene (mixed isomers)0.00
INTERVALA LLCIntervalaLead 0.00
NEWARK AMERICAGreif Inc.Lead 0.00
CHEMGENES CORPCHEMGENES CORPAcetonitrile0.00
MEXICHEM SPECIALTY COMPOUNDSOrbia Advance CorporationZinc compounds0.00
HOLDEN TRAP ROCKMA BROKEN STONE COPolycyclic aromatic compounds0.00
JG MACLELLAN CONCRETE CO INCJG MACLELLAN CONCRETE CO INCLead compounds0.00
WORTHEN INDUSTRIES INC UPACO DIVWorthen IndustriesToluene0.00
RAYTHEON CORTX CorporationLead 0.00
INNER-TITE CORP.INNER-TITE CORP.Lead 0.00
DAV-TECH PLATING INC.DAV-TECH PLATING INC.Nitric acid0.00
COLT REFINING INCCOLT REFINING INCSilver compounds0.00
JG MACLELLAN CONCRETE CO INCJG MACLELLAN CONCRETE CO INCLead compounds0.00
FIREYE INCCarrier Global CorporationLead 0.00
NYACOL NANOTECHNOLOGIES INCNYACOL NANOTECHNOLOGIES INCNitric acid0.00
SAINT-GOBAIN ABRASIVES & SAINT -GOBAIN CERAMICS & PLASTICSSaint-GobainEthylene glycol0.00
UNIVAR SOLUTIONS USA INC. - TEWKSBURY MAApollo Global ManagementXylene (mixed isomers)0.00
BRADFORD INDUSTRIESWembly EnterprisesToluene0.00
RYMES - HUDSONSUPERIOR PLUS CORPPolycyclic aromatic compounds0.00
PARKER HANNIFIN CORP CHOMERICS DIVParker-HannifinToluene0.00
OMNOVA SOLUTIONSSynthomerAcrylic acid0.00
KOCH SEPARATION SOLUTIONS INC.Koch IndustriesN,N-Dimethylformamide0.00
US PACK INCUS PACK INC1,2,4-Trimethylbenzene0.00
S&E SPECIALTY POLYMERS LLCNautic PartnersLead 0.00
HOLCIM - NER INC.Holcim GroupLead compounds0.00
DUXBURY COMPOSITE PRODUCTS DBA PLP COMPOSITESDUXBURY COMPOSITE PRODUCTS DBA PLP COMPOSITESStyrene0.00
OMNOVA SOLUTIONSSynthomerEthyl acrylate0.00
BOSTIK MANUFACTURING PLANTArkemaToluene0.00
S&E SPECIALTY POLYMERS LLCNautic PartnersZinc compounds0.00
DAUPHINAIS CONCRETE INC.DAUPHINAIS CONCRETE INCLead 0.00
ALLCOAT TECHNOLOGY INCALLCOAT TECHNOLOGY INCN,N-Dimethylformamide0.00
ADVANCE COATINGS COADVANCE COATINGS COMethyl methacrylate0.00
HOLOGIC INCHologicMethanol0.00
BOSTIK MANUFACTURING PLANTArkemaEthylene glycol0.00
SUPERCON INCSUPERCON INCNitric acid0.00
ALLCOAT TECHNOLOGY INCALLCOAT TECHNOLOGY INCXylene (mixed isomers)0.00
ANALOG DEVICES INC/WILMINGTON MANUFACTURINGAnalog Devices Inc.Nitric acid0.00
ADVANCE COATINGS COADVANCE COATINGS COEthylene glycol0.00
VERANOVA L.P.Altaris Capital PartnersDichloromethane (Methylene chloride)0.00
BIOSYNTH INTERNATIONAL INC.KKR & Co.Acetonitrile0.00
MAJILITE MANUFACTURING INCMERIDIAN INDUSTRIES INCToluene0.00
UNIVAR SOLUTIONS USA INC. - TEWKSBURY MAApollo Global ManagementToluene0.00
ALLCOAT TECHNOLOGY INCALLCOAT TECHNOLOGY INCToluene0.00
PLATING FOR ELECTRONICS INC.PLATING FOR ELECTRONICS INC.Nitric acid0.00
CHEMGENES CORPCHEMGENES CORPn-Hexane (Hexane)0.00
CHROMA COLOR CORPArsenal Capital PartnersZinc compounds0.00
INDUSTRIAL POLYMERS & CHEMICAL S INCINDUSTRIAL POLYMERS & CHEMICAL S INCPhenol0.00
THERMO FISHER SCIENTIFICThermo Fisher ScientificMethanol0.00
VERANOVA L.P.Altaris Capital PartnersMethanol0.00
BENEVENTO SAND & STONE CORPBENEVENTO SAND & STONE CORPLead compounds0.00
US PACK INCUS PACK INCEthylene glycol0.00
SANMINA CORP.SanminaLead 0.00
COVESTRO LLCCovestroMethyl methacrylate0.00
BOSTIK MANUFACTURING PLANTArkemaCyclohexane0.00
SHAWSHEEN RUBBER CO INCSHAWSHEEN RUBBER CO INCToluene0.00
MARMON UTILITY LLCBerkshire HathawayAcetophenone0.00
WORTHEN INDUSTRIES INC UPACO DIVWorthen Industriesn-Butyl alcohol (1-Butanol)0.00
ENTEGRIS INCEntegrisMethanol0.00
SCULLY SIGNALSCULLY SIGNALZinc compounds0.00
UNIVAR SOLUTIONS USA INC. - TEWKSBURY MAApollo Global ManagementMethanol0.00
AVIENT COLORANTS USA LLC - HOLDEN FACILITYAvient CorporationZinc compounds0.00
BROX INDUSTRIES INCBrox IndustriesBenzo[g,h,i]perylene0.00
CABOT CORPCabot Corp.Sodium nitrite0.00
SEAMAN PAPER CO. OF MASSACHUSETTS INC.SEAMAN PAPER CO. OF MASSACHUSETTS INC.Benzo[g,h,i]perylene0.00
THUNDERLINE-ZOne Rock Capital PartnersAmmonia (includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing)0.00
BENEVENTO SAND & STONE CORPBENEVENTO SAND & STONE CORPBenzo[g,h,i]perylene0.00
GE COGeneral ElectricNitrate compounds (water dissociable; reportable only when in aqueous solution)0.00
TELEDYNE FLIR SURVEILLANCETeledyne TechnologiesLead 0.00
THERMO FISHER SCIENTIFICThermo Fisher ScientificMethanol0.00
OMNOVA SOLUTIONSSynthomerMethyl methacrylate0.00
SAINT GOBAIN PERFORMANCE PLASTICSSaint-GobainXylene (mixed isomers)0.00
NYACOL NANOTECHNOLOGIES INCNYACOL NANOTECHNOLOGIES INCEthylene glycol0.00
NYLON CORP OF AMERICAWEMBLY NYCOA HOLDINGS LLCZinc compounds0.00
MURPHYS WASTE OIL SERVICES INCClean Harbors Inc.Polycyclic aromatic compounds0.00
BIOSYNTH INTERNATIONAL INC.KKR & Co.N,N-Dimethylformamide0.00
BOSTIK MANUFACTURING PLANTArkemaMethanol0.00
OMNOVA SOLUTIONSSynthomerStyrene0.00
BROX INDUSTRIES INCBrox IndustriesBenzo[g,h,i]perylene0.00
HOOKSETT CRUSHED STONE PIKE INDUSTRIES INCCRH PLCBenzo[g,h,i]perylene0.00
VERANOVA L.P.Altaris Capital PartnersMethyl isobutyl ketone0.00
HOLDEN TRAP ROCKMA BROKEN STONE COBenzo[g,h,i]perylene0.00
BROX INDUSTRIES INCBrox IndustriesBenzo[g,h,i]perylene0.00
AOTCO METAL FINISHING LLCAOTCO METAL FINISHING LLCNitric acid0.00
BROX INDUSTRIES INCBrox IndustriesPolycyclic aromatic compounds0.00
RYMES - HUDSONSUPERIOR PLUS CORPBenzo[g,h,i]perylene0.00
GVS N.A.GVS GroupFormic acid0.00
SAFETY-KLEEN SYSTEMS MARLBOROUGH (MRB)Clean Harbors Inc.Ethylene glycol0.00
MURPHYS WASTE OIL SERVICES INCClean Harbors Inc.Ethylene glycol0.00
DAUPHINAIS CONCRETE INC.DAUPHINAIS CONCRETE INCNitrate compounds (water dissociable; reportable only when in aqueous solution)0.00
BROX INDUSTRIES INCBrox IndustriesPolycyclic aromatic compounds0.00
JAYBIRD & MAIS INCJAYBIRD & MAIS INCToluene0.00
SAINT GOBAIN PERFORMANCE PLASTICSSaint-GobainMethyl isobutyl ketone0.00
ANIKA THERAPEUTICSAnika TherapeuticsMethanol0.00
BROX INDUSTRIES INCBrox IndustriesPolycyclic aromatic compounds0.00
SAINT GOBAIN PERFORMANCE PLASTICSSaint-GobainToluene0.00
NEW HAMPSHIRE BALL BEARINGS INCMinebeaMitsumiMethanol0.00
VERANOVA L.P.Altaris Capital PartnersMethanol0.00
MURPHYS WASTE OIL SERVICES INCClean Harbors Inc.Benzo[g,h,i]perylene0.00
EMD MILLIPORE CORPMerck KGaA (EMD)Methanol0.00
GVS N.A.GVS GroupN-Methyl-2-pyrrolidone0.00
CYTIVADanaherN-Methyl-2-pyrrolidone0.00
SAINT-GOBAIN ABRASIVES & SAINT -GOBAIN CERAMICS & PLASTICSSaint-GobainLithium carbonate0.00
ROHM & HAAS ELECTRONIC MATERIALS LLCDuPont de NemoursN-Methyl-2-pyrrolidone0.00
SARTORIUS STEDIM 450 DLBSARTORIUS STEDIM BIOTECHN-Methyl-2-pyrrolidone0.00
SKYWORKS SOLUTIONS INCSkyworks SolutionsN-Methyl-2-pyrrolidone0.00
CURIA MASSACHUSETTS INC.AledadeN-Methyl-2-pyrrolidone0.00
RAYTHEON CORTX CorporationN-Methyl-2-pyrrolidone0.00
MACOM TECHNOLOGY SOLUTIONS INCM/A-COM TECHNOLOGY SOLUTIONS HOLDINGSN-Methyl-2-pyrrolidone0.00
KOCH SEPARATION SOLUTIONS INC.Koch IndustriesN-Methyl-2-pyrrolidone0.00
ALLCOAT TECHNOLOGY INCALLCOAT TECHNOLOGY INCN-Methyl-2-pyrrolidone0.00
CL HAUTHAWAY & SONS CORPCL HAUTHAWAY & SONS CORPN-Methyl-2-pyrrolidone0.00
PARKER HANNIFIN CORP CHOMERICS DIVParker-HannifinTetrabromobisphenol A0.00
WORTHEN INDUSTRIES INC UPACO DIVWorthen IndustriesN-Methyl-2-pyrrolidone0.00
BAE SYSTEMS INFORMATION & ELECTRONIC SYSTEMS INTEGRATIONBAE SystemsN-Methyl-2-pyrrolidone0.00
EMD MILLIPORE CORPMerck KGaA (EMD)N-Methyl-2-pyrrolidone0.00

(click here to shrink list to only top 5 chemicals from facilities)

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Political Economy Research Institute
Gordon Hall, 418 N. Pleasant St., Suite A, Amherst, MA 01002
Tel: 413-545-6355    Fax: 413-577-0261    Contact: peri@peri.umass.edu
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2025