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Air Toxics at School 2022

School Info

SchoolLANDMARK HIGH SCHOOL
Street429 HALE ST
CityPRIDES CROSSING
StateMA
Number of students461
Student % minority17%
Data SourcePSS (private schools)

Air Toxics Info

Number of facilities affecting school106
Number of chemicals affecting school54
Toxic percentile nationwide (1=worst)34th
Toxic rank nationwide (1=worst)43,738
Toxic percentile statewide (1=worst)19th
Toxic rank statewide (1=worst)458
Toxic Hazard1,418.44

This school's air toxic concentration is 0.29 times the national average at schools.

This school's air toxic concentration is 1.45 times the state average at schools.

Top 5 facilities

FacilityParent CompanyToxic Hazard
TECOMETCharlesbank Capital Partners504.41
GE AVIATIONGeneral Electric503.21
TECHNICAL MANUFACTURING CORPAmetek82.72
BOYD CORP INC.Goldman Sachs75.55
PALMER MANUFACTURING CO LLCPursuit Aerospace65.59

(click here to expand list to all facilities)

Top 5 chemicals

ChemicalToxic Hazard
Chromium618.62
Cobalt525.69
Trichloroethylene75.55
Hydrazine63.42
Nickel47.07

(click here to expand list to all chemicals)

Top chemicals from facilities

FacilityParent CompanyChemicalToxic Hazard
TECOMETCharlesbank Capital PartnersCobalt400.33
GE AVIATIONGeneral ElectricChromium399.18
TECOMETCharlesbank Capital PartnersChromium102.04
TECHNICAL MANUFACTURING CORPAmetekChromium82.72
BOYD CORP INC.Goldman SachsTrichloroethylene75.55
UNION SPECIALTIES INCUNION SPECIALTIES INCHydrazine63.42
GE AVIATIONGeneral ElectricCobalt62.91
PALMER MANUFACTURING CO LLCPursuit AerospaceCobalt42.17
GE AVIATIONGeneral ElectricNickel41.11
PARKER HANNIFIN CORP CHOMERICS DIVParker-HannifinNickel compounds34.65
PALMER MANUFACTURING CO LLCPursuit AerospaceChromium22.02
PARADIGM PRECISION HOLDINGS LLCPursuit AerospaceCobalt20.28
CHEMGENES CORPCHEMGENES CORPChloroform11.60
PACE INDUSTRIES - CAMBRIDGE DIVPace IndustriesLead 11.04
LUBRIZOL ADVANCED MATERIALS INCBerkshire HathawayDiisocyanates10.95
PARADIGM PRECISION HOLDINGS LLCPursuit AerospaceChromium10.59
TEI BIOSCIENCESIntegra LifeSciencesChloroform6.09
GLOBAL COMPANIES LLCGlobal Partners LPBenzene2.84
GULF OIL LP CHELSEA TERMINALRaceTrac PetroleumBenzene2.39
IRVING OIL TERMINALS INC.Irving OilBenzene2.19
TECOMETCharlesbank Capital PartnersNickel2.04
WOLLASTON ALLOYSConsolidated Precision ProductsNickel1.77
PALMER MANUFACTURING CO LLCPursuit AerospaceNickel1.40
WOLLASTON ALLOYSConsolidated Precision ProductsChromium1.38
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)Benzene1.04
ENTEGRIS INCEntegrisDi(2-ethylhexyl) phthalate0.88
PACE INDUSTRIES - CAMBRIDGE DIVPace IndustriesZinc compounds0.77
BERKSHIRE MANUFACTURED PRODUCTS INCPursuit AerospaceChromium0.69
PARADIGM PRECISION HOLDINGS LLCPursuit AerospaceNickel0.67
EXXON MOBIL CORP EVERETT TERMINALExxon MobilBenzene0.52
HOLCIM - NER INC.Holcim GroupPolycyclic aromatic compounds0.36
ALLCOAT TECHNOLOGY INCALLCOAT TECHNOLOGY INCDiisocyanates0.34
IRVING OIL TERMINALS INC.Irving OilNaphthalene0.28
ANALOG DEVICES INC/WILMINGTON MANUFACTURINGAnalog Devices Inc.Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)0.23
KENDALL GREEN ENERGY LLCAntin Infrastructure PartnersPolycyclic aromatic compounds0.18
UNION SPECIALTIES INCUNION SPECIALTIES INCDiisocyanates0.15
DAMPNEY CO INCDAMPNEY CO INCEthylbenzene0.14
PARKER HANNIFIN CORP CHOMERICS DIVParker-HannifinCopper0.12
CHELSEA SANDWICH LLCGlobal Partners LPNaphthalene0.11
FXI INC. - NEWBURYPORTOne Rock Capital PartnersToluene diisocyanate (mixed isomers)0.11
HOLCIM - NER INC.Holcim GroupPolycyclic aromatic compounds0.09
COVESTRO LLCCovestroTriethylamine0.08
BERKSHIRE MANUFACTURED PRODUCTS INCPursuit AerospaceNickel0.07
ROUSSELOT PEABODY INC.Darling IngredientsAmmonia (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)0.07
GLOBAL COMPANIES LLCGlobal Partners LPNaphthalene0.06
AVCARB MATERIAL SOLUTIONSArsenal Capital PartnersHydrogen cyanide0.06
ANALOG DEVICES INC/WILMINGTON MANUFACTURINGAnalog Devices Inc.Hydrogen fluoride (Hydrofluoric acid)0.05
DUNCAN GALVANIZING CORP.DUNCAN GALVANIZING CORP.Lead compounds0.04
ALLCOAT TECHNOLOGY INCALLCOAT TECHNOLOGY INCToluene diisocyanate (mixed isomers)0.04
SPECIALTY MATERIALS INC.Global MaterialsHydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)0.04
DUNCAN GALVANIZING CORP.DUNCAN GALVANIZING CORP.Zinc compounds0.04
FLEXCON INDUSTRIESSwan GroupXylene (mixed isomers)0.04
MEDTRONIC INCMedtronicn-Hexane (Hexane)0.03
HOLCIM - NER INC.Holcim GroupPolycyclic aromatic compounds0.03
EXXON MOBIL CORP EVERETT TERMINALExxon MobilNaphthalene0.03
PACE INDUSTRIES - CAMBRIDGE DIVPace IndustriesCopper0.03
DAMPNEY CO INCDAMPNEY CO INCXylene (mixed isomers)0.02
BOSTIK MANUFACTURING PLANTArkemaAntimony compounds0.02
LAMB & RITCHIELAMB & RITCHIELead 0.02
GLOBAL COMPANIES LLCGlobal Partners LPEthylbenzene0.02
MAJILITE MANUFACTURING INCMERIDIAN INDUSTRIES INCN,N-Dimethylformamide0.02
FM CALLAHAN & SON INCFM CALLAHAN & SON INCNitric acid0.02
EXXON MOBIL CORP EVERETT TERMINALExxon MobilEthylbenzene0.01
IRVING OIL TERMINALS INC.Irving OilEthylbenzene0.01
WINCHESTER INTERCONNECT RF CORPAptiv PLCCopper0.01
IDEAL TAPE COAmerican BiltriteToluene0.01
HOLCIM SOLUTIONS & PRODUCTS US LLCHolcim GroupDichloromethane (Methylene chloride)0.01
PARKER HANNIFIN CORP CHOMERICS DIVParker-HannifinSilver compounds0.01
COVESTRO LLCCovestroDiisocyanates0.01
COVESTRO LLCCovestroToluene-2,4-diisocyanate0.01
ANALOG DEVICES INC/WILMINGTON MANUFACTURINGAnalog Devices Inc.Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)0.01
GULF OIL LP CHELSEA TERMINALRaceTrac PetroleumEthylbenzene0.01
PCI SYNTHESISSK Capital PartnersDichloromethane (Methylene chloride)0.01
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)Ethylbenzene0.01
GULF OIL LP CHELSEA TERMINALRaceTrac PetroleumNaphthalene0.01
CHELSEA SANDWICH LLCGlobal Partners LP1,2,4-Trimethylbenzene0.01
WORTHEN INDUSTRIES INC UPACO DIVWorthen IndustriesToluene diisocyanate (mixed isomers)0.01
ANALOGIC CORPAltaris Capital PartnersLead 0.01
CALPINE FORE RIVER ENERGY CENTER LLCEnergy Capital PartnersPolycyclic aromatic compounds0.01
EDWARDS VACUUM LLCAtlas CopcoLead 0.01
GLOBAL COMPANIES LLCGlobal Partners LPXylene (mixed isomers)0.01
TECOMETCharlesbank Capital PartnersManganese0.01
BENEVENTO SAND & STONE CORPBENEVENTO SAND & STONE CORPPolycyclic aromatic compounds0.00
ITW PERFORMANCE POLYMERSIllinois Tool WorksMethyl methacrylate0.00
CHEMGENES CORPCHEMGENES CORPAcetonitrile0.00
AVEDIS ZILDJIAN CO.AVEDIS ZILDJIAN COCopper0.00
BRADFORD INDUSTRIESWembly EnterprisesN,N-Dimethylformamide0.00
CLEAN HARBORS OF BRAINTREE INC.Clean Harbors Inc.Lead 0.00
SCITUATE CONCRETE PIPESCITUATE CONCRETE PIPELead 0.00
GULF OIL LP CHELSEA TERMINALRaceTrac Petroleum1,2,4-Trimethylbenzene0.00
ICP CONSTRUCTIONCPC HOLDING LLCEthylene glycol0.00
IRVING OIL TERMINALS INC.Irving OilLead 0.00
IDEAL TAPE COAmerican Biltriten-Hexane (Hexane)0.00
UNIVAR SOLUTIONS USA INC. - TEWKSBURY MAApollo Global ManagementN,N-Dimethylformamide0.00
UNION SPECIALTIES INCUNION SPECIALTIES INCTriethylamine0.00
GLOBAL COMPANIES LLCGlobal Partners LPPolycyclic aromatic compounds0.00
GLOBAL COMPANIES LLCGlobal Partners LP1,2,4-Trimethylbenzene0.00
TRANSENE CO INC.TRANSENE CO INCNitric acid0.00
KOCH SEPARATION SOLUTIONS INC.Koch IndustriesN,N-Dimethylformamide0.00
STRAUMANN MANUFACTURING INCSTRAUMANN MANUFACTURING INCn-Hexane (Hexane)0.00
TORROMEO INDUSTRIES INCTORROMEO INDUSTRIES INCLead compounds0.00
TRANSENE CO INC.TRANSENE CO INCHydrogen fluoride (Hydrofluoric acid)0.00
TORROMEO INDUSTRIES INC.TORROMEO INDUSTRIES INCLead compounds0.00
ALLCOAT TECHNOLOGY INCALLCOAT TECHNOLOGY INCN,N-Dimethylformamide0.00
JG MACLELLAN CONCRETE CO INCJG MACLELLAN CONCRETE CO INCLead compounds0.00
EXXON MOBIL CORP EVERETT TERMINALExxon MobilXylene (mixed isomers)0.00
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)1,2,4-Trimethylbenzene0.00
IRVING OIL TERMINALS INC.Irving OilXylene (mixed isomers)0.00
GULF OIL LP CHELSEA TERMINALRaceTrac PetroleumXylene (mixed isomers)0.00
MATEP LLCLongwood Energy 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
BROX INDUSTRIES INCBrox IndustriesLead 0.00
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)Xylene (mixed isomers)0.00
BOSTIK MANUFACTURING PLANTArkemaToluene0.00
THE DOW CHEMICAL CODow Inc.Ethylbenzene0.00
UNION SPECIALTIES INCUNION SPECIALTIES INCCertain glycol ethers0.00
HOLCIM - NER INC.Holcim GroupLead compounds0.00
ALLCOAT TECHNOLOGY INCALLCOAT TECHNOLOGY INCXylene (mixed isomers)0.00
CALPINE FORE RIVER ENERGY CENTER LLCEnergy 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
VICOR CORPVicor Corp.Copper0.00
ANALOG DEVICES INC/WILMINGTON MANUFACTURINGAnalog Devices Inc.Nitric acid0.00
BOSTIK MANUFACTURING PLANTArkemaEthylene glycol0.00
HOLCIM SOLUTIONS & PRODUCTS US LLCHolcim Groupn-Hexane (Hexane)0.00
JG MACLELLAN CONCRETE CO INCJG MACLELLAN CONCRETE CO INCLead compounds0.00
KENDALL GREEN ENERGY LLCAntin Infrastructure 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
HOLCIM - NER INC.Holcim GroupLead compounds0.00
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)n-Hexane (Hexane)0.00
IRVING OIL TERMINALS INC.Irving OilPolycyclic aromatic compounds0.00
GRANITE STATE CONCRETE CO INC WESTFORDJG MACLELLAN CONCRETE CO INCLead compounds0.00
HERO COATINGS INC.HERO COATINGS INC.Toluene0.00
ALLCOAT TECHNOLOGY INCALLCOAT TECHNOLOGY INCToluene0.00
CHEMGENES CORPCHEMGENES CORPn-Hexane (Hexane)0.00
WOLLASTON ALLOYSConsolidated Precision ProductsCopper0.00
GLOBAL COMPANIES LLCGlobal Partners LPn-Hexane (Hexane)0.00
GULF OIL LP CHELSEA TERMINALRaceTrac Petroleumn-Hexane (Hexane)0.00
IRVING OIL TERMINALS INC.Irving Oil1,2,4-Trimethylbenzene0.00
DAMPNEY CO INCDAMPNEY CO INCToluene0.00
RAYTHEON CORTX CorporationLead 0.00
IRVING OIL TERMINALS INC.Irving Oiln-Hexane (Hexane)0.00
PLATING FOR ELECTRONICS INC.PLATING FOR ELECTRONICS INC.Nitric acid0.00
ULTRAAdvent InternationalLead compounds0.00
THERMO FISHER SCIENTIFICThermo Fisher ScientificMethanol0.00
COVESTRO LLCCovestroMethyl methacrylate0.00
EXXON MOBIL CORP EVERETT TERMINALExxon Mobil1,2,4-Trimethylbenzene0.00
CL HAUTHAWAY & SONS CORPCL HAUTHAWAY & SONS CORPn-Hexane (Hexane)0.00
EXXON MOBIL CORP EVERETT TERMINALExxon Mobiln-Hexane (Hexane)0.00
DAUPHINAIS CONCRETE INC.DAUPHINAIS CONCRETE INCLead 0.00
BOSTIK MANUFACTURING PLANTArkemaCyclohexane0.00
SCULLY SIGNALSCULLY SIGNALZinc compounds0.00
UNIVAR SOLUTIONS USA INC. - TEWKSBURY MAApollo Global ManagementXylene (mixed isomers)0.00
GLOBAL COMPANIES LLCGlobal Partners LPToluene0.00
VERANOVA L.P.Altaris Capital PartnersDichloromethane (Methylene chloride)0.00
BRADFORD INDUSTRIESWembly EnterprisesToluene0.00
HOLCIM SOLUTIONS & PRODUCTS US LLCHolcim GroupToluene0.00
HOUGHTON CHEMICAL CORPHOUGHTON CHEMICAL CORPCertain glycol ethers0.00
THE DOW CHEMICAL CODow Inc.Xylene (mixed isomers)0.00
CHELSEA SANDWICH LLCGlobal Partners LPPolycyclic aromatic compounds0.00
GLOBAL COMPANIES LLCGlobal Partners LPBenzo[g,h,i]perylene0.00
CL HAUTHAWAY & SONS CORPCL HAUTHAWAY & SONS CORPCyclohexane0.00
ENTEGRIS INCEntegrisMethanol0.00
HOUGHTON CHEMICAL CORPHOUGHTON CHEMICAL CORPEthylene glycol0.00
GULF OIL LP CHELSEA TERMINALRaceTrac PetroleumToluene0.00
CL HAUTHAWAY & SONS CORPCL HAUTHAWAY & SONS CORPToluene0.00
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)Toluene0.00
MURPHYS WASTE OIL SERVICES INCClean Harbors Inc.Polycyclic aromatic compounds0.00
IRVING OIL TERMINALS INC.Irving OilToluene0.00
3M CO3M CompanyToluene0.00
BENEVENTO SAND & STONE CORPBENEVENTO SAND & STONE CORPLead compounds0.00
CB FISK INCCB FISK INCLead 0.00
HENKEL OF AMERICA INC.HenkelMethyl methacrylate0.00
EXXON MOBIL CORP EVERETT TERMINALExxon MobilToluene0.00
ITW/FOILMARK INCIllinois Tool WorksToluene0.00
TELEDYNE FLIR SURVEILLANCETeledyne TechnologiesLead 0.00
THE DOW CHEMICAL CODow Inc.Propylene oxide0.00
WORTHEN INDUSTRIES INC UPACO DIVWorthen IndustriesN,N-Dimethylformamide0.00
UNIVAR SOLUTIONS USA INC. - TEWKSBURY MAApollo Global ManagementToluene0.00
MAJILITE MANUFACTURING INCMERIDIAN INDUSTRIES INCToluene0.00
3M CO3M CompanyMethanol0.00
ANDOVER HEALTHCARE INC.MillikenZinc compounds0.00
THE GILLETTE CO LLCProcter & GambleAmmonia (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
PCI SYNTHESISSK Capital PartnersToluene0.00
SHAWSHEEN RUBBER CO INCSHAWSHEEN RUBBER CO INCToluene0.00
THERMO FISHER SCIENTIFICThermo Fisher ScientificMethanol0.00
BOSTIK MANUFACTURING PLANTArkemaMethanol0.00
CABOT CORPCabot Corp.Sodium nitrite0.00
HOUGHTON CHEMICAL CORPHOUGHTON CHEMICAL CORPMethanol0.00
MURPHYS WASTE OIL SERVICES INCClean Harbors Inc.Ethylene glycol0.00
UNIVAR SOLUTIONS USA INC. - TEWKSBURY MAApollo Global ManagementMethanol0.00
BROX INDUSTRIES INCBrox IndustriesBenzo[g,h,i]perylene0.00
OLYMPIC ADHESIVES INCOLYMPIC ADHESIVES INCPhenol0.00
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
HOUGHTON CHEMICAL CORPHOUGHTON CHEMICAL CORPToluene0.00
AOTCO METAL FINISHING LLCAOTCO METAL FINISHING LLCNitric acid0.00
PCI SYNTHESISSK Capital PartnersMethanol0.00
ELECTRONIC PRODUCTS INCELECTRONIC PRODUCTS INCAmmonia (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
TEI BIOSCIENCESIntegra LifeSciencesMethanol0.00
HOUGHTON CHEMICAL CORPHOUGHTON CHEMICAL CORPXylene (mixed isomers)0.00
VERANOVA L.P.Altaris Capital PartnersMethyl isobutyl ketone0.00
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)Cyclohexane0.00
RESILIENCE BOSTON INC.NATIONAL RESILIENCE INCEthylene glycol0.00
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)Cumene0.00
INEOS STYROLUTION AMERICA LLCIneosStyrene0.00
ITW/FOILMARK INCIllinois Tool WorksMethanol0.00
ANIKA THERAPEUTICSAnika TherapeuticsMethanol0.00
WORTHEN INDUSTRIES INC UPACO DIVWorthen IndustriesXylene (mixed isomers)0.00
BROX INDUSTRIES INCBrox IndustriesPolycyclic aromatic compounds0.00
DAUPHINAIS CONCRETE INC.DAUPHINAIS CONCRETE INCNitrate compounds (water dissociable; reportable only when in aqueous solution)0.00
JAYBIRD & MAIS INCJAYBIRD & MAIS INCToluene0.00
INEOS STYROLUTION AMERICA LLCIneosMethyl methacrylate0.00
CHELSEA SANDWICH LLCGlobal Partners LPBenzo[g,h,i]perylene0.00
MURPHYS WASTE OIL SERVICES INCClean Harbors Inc.Benzo[g,h,i]perylene0.00
IRVING OIL TERMINALS INC.Irving OilBenzo[g,h,i]perylene0.00
ECKART AMERICAAltanan-Butyl alcohol (1-Butanol)0.00
THE DOW CHEMICAL CODow Inc.Toluene0.00
THE DOW CHEMICAL CODow Inc.Ethylene glycol0.00
CHEMTAN CO INCCHEMTAN CO INCFormic acid0.00
VERANOVA L.P.Altaris Capital PartnersMethanol0.00
WORTHEN INDUSTRIES INC UPACO DIVWorthen Industriesn-Butyl alcohol (1-Butanol)0.00
WORTHEN INDUSTRIES INC UPACO DIVWorthen IndustriesToluene0.00
ECKART AMERICAAltanaMethyl isobutyl ketone0.00
ROHM & HAAS ELECTRONIC MATERIALS LLCDuPont de NemoursFormaldehyde0.00
ROHM & HAAS ELECTRONIC MATERIALS LLCDuPont de NemoursN-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
ITW PERFORMANCE POLYMERSIllinois Tool WorksBenzoyl peroxide0.00
UNION SPECIALTIES INCUNION SPECIALTIES INCN-Methyl-2-pyrrolidone0.00
WORTHEN INDUSTRIES INC UPACO DIVWorthen IndustriesN-Methyl-2-pyrrolidone0.00
HENKEL OF AMERICA INC.HenkelN-Methyl-2-pyrrolidone0.00
ENVIRO WASTEClean Harbors Inc.Polycyclic aromatic compounds0.00
ENVIRO WASTEClean Harbors Inc.Benzo[g,h,i]perylene0.00
ECKART AMERICAAltanaN-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