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Air Toxics at School 2022

School Info

SchoolSilver Lake Regional Middle School
Street256 Pembroke Street
CityKingston
StateMA
Number of students528
Student % minority7%
TypeRegular School
Status1
LevelMiddle School
Data SourceCCD (public schools)

Air Toxics Info

Number of facilities affecting school88
Number of chemicals affecting school60
Toxic percentile nationwide (1=worst)58th
Toxic rank nationwide (1=worst)75,399
Toxic percentile statewide (1=worst)73rd
Toxic rank statewide (1=worst)1,820
Toxic Hazard401.06

This school's air toxic concentration is 0.08 times the national average at schools.

This school's air toxic concentration is 0.41 times the state average at schools.

Top 5 facilities

FacilityParent CompanyToxic Hazard
DEPUY SYNTHES A JOHNSON & JOHNSON COJohnson & Johnson238.46
ROTHTEC ENGRAVING CORPROTHTEC ENGRAVING CORP101.84
CERTAINTEED LLCSaint-Gobain40.12
ARISTON THERMO USA (PREV HEAT TRANSFER PRODUCTS)ARISTON THERMO USA3.76
WHIRLPOOL CORPWhirlpool Corp.3.72

(click here to expand list to all facilities)

Top chemicals

ChemicalToxic Hazard
Cobalt212.00
Nickel compounds101.84
Chromium 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.) 40.11
Chromium35.98
Nickel3.89
Cadmium compounds2.16
Formaldehyde1.87
Diisocyanates0.96
Benzene0.59
Chloroform0.40
Chlorine0.31
Toluene diisocyanate (mixed isomers)0.28
Polycyclic aromatic compounds0.18
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)0.10
Copper0.09
Xylene (mixed isomers)0.05
Dichloromethane (Methylene chloride)0.05
Manganese0.04
Naphthalene0.02
Nitric acid0.02
Lead 0.02
Butyl acrylate0.02
Certain glycol ethers0.02
Lead compounds0.02
Antimony compounds0.01
Ethylbenzene0.01
Maleic anhydride0.01
Acetonitrile0.01
Zinc compounds0.00
Acrylic acid0.00
n-Hexane (Hexane)0.00
Ammonia (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
Phenol0.00
Styrene0.00
Hydrogen fluoride (Hydrofluoric acid)0.00
Cyanide compounds0.00
Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.)0.00
1,2,4-Trimethylbenzene0.00
Toluene0.00
Zinc (fume or dust)0.00
Vinyl acetate0.00
Methyl isobutyl ketone0.00
Silver compounds0.00
Methanol0.00
Propylene oxide0.00
Mercury0.00
Biphenyl0.00
Benzo[g,h,i]perylene0.00
Ethylene glycol0.00
Ethyl acrylate0.00
Silver0.00
tert-Butyl alcohol (tert-Butanol)0.00
Methyl methacrylate0.00
Cumene0.00
Cyclohexane0.00
Nitrate compounds (water dissociable; reportable only when in aqueous solution)0.00
n-Butyl alcohol (1-Butanol)0.00
Di(2-ethylhexyl) phthalate0.00
N-Methyl-2-pyrrolidone0.00
Nonylphenol Ethoxylates0.00

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

Top chemicals from facilities

FacilityParent CompanyChemicalToxic Hazard
DEPUY SYNTHES A JOHNSON & JOHNSON COJohnson & JohnsonCobalt212.00
ROTHTEC ENGRAVING CORPROTHTEC ENGRAVING CORPNickel compounds101.84
CERTAINTEED LLCSaint-GobainChromium 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.) 40.11
DEPUY SYNTHES A JOHNSON & JOHNSON COJohnson & JohnsonChromium26.47
WHIRLPOOL CORPWhirlpool Corp.Chromium3.60
ENGINEERED MATERIALS SOLUTIONS LLCWickeder GroupChromium2.38
CHECON LLCCHECON LLCCadmium compounds2.16
ARISTON THERMO USA (PREV HEAT TRANSFER PRODUCTS)ARISTON THERMO USAChromium1.88
NATIONAL COATING CORPCarlisleFormaldehyde1.79
WOLLASTON ALLOYSConsolidated Precision ProductsNickel1.60
ARISTON THERMO USA (PREV HEAT TRANSFER PRODUCTS)ARISTON THERMO USANickel1.35
WOLLASTON ALLOYSConsolidated Precision ProductsChromium1.24
ENGINEERED MATERIALS SOLUTIONS LLCWickeder GroupNickel0.51
ARISTON THERMO USA (PREV HEAT TRANSFER PRODUCTS)ARISTON THERMO USADiisocyanates0.51
ACUSHNET RUBBER CO D/B/A PRECIX INC.Zhongding Holding GroupDiisocyanates0.43
SMITH & NEPHEWSmith & NephewChromium0.41
TEI BIOSCIENCESIntegra LifeSciencesChloroform0.40
CAPSTAN ATLANTICCAPSTAN ATLANTICNickel0.30
FUTURE FOAM INCFUTURE FOAM INCToluene diisocyanate (mixed isomers)0.28
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)Benzene0.23
TECH-ETCH INCTECH ETCH INCChlorine0.20
GLOBAL COMPANIES LLCGlobal Partners LPBenzene0.12
WHIRLPOOL CORPWhirlpool Corp.Nickel0.11
GULF OIL LP CHELSEA TERMINALRaceTrac PetroleumBenzene0.11
METALOR TECHNOLOGIES USA CORP REFINING DIVTanaka Kikinzoku KogyoChlorine0.11
IRVING OIL TERMINALS INC.Irving OilBenzene0.10
CANAL GENERATING LLCJERASulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)0.10
ELECTRO FIBER TECHNOLOGIESJames CropperFormaldehyde0.08
KENDALL GREEN ENERGY LLCAntin Infrastructure PartnersPolycyclic aromatic compounds0.06
HOLCIM SOLUTIONS & PRODUCTS US LLCHolcim GroupDichloromethane (Methylene chloride)0.05
FLEXCON INDUSTRIESSwan GroupXylene (mixed isomers)0.05
CYN OILClean Harbors Inc.Polycyclic aromatic compounds0.04
BABS FOUNDRYBABS FOUNDRYCopper0.03
EXXON MOBIL CORP EVERETT TERMINALExxon MobilBenzene0.03
CANAL GENERATING LLCJERAPolycyclic aromatic compounds0.03
TECH-ETCH INCTECH ETCH INCCopper0.02
HOLCIM - NER INC.Holcim GroupPolycyclic aromatic compounds0.02
GLOBE COMPOSITE SOLUTIONS LLCESCO TechnologiesDiisocyanates0.02
TACO INC. - FALL RIVERTACO INCManganese0.02
ENGINEERED MATERIALS SOLUTIONS LLCWickeder GroupCopper0.02
ARISTON THERMO USA (PREV HEAT TRANSFER PRODUCTS)ARISTON THERMO USAManganese0.02
ISP FREETOWN FINE CHEMICALS INCAshland Global HoldingsButyl acrylate0.02
TECH-ETCH INCTECH ETCH INCNitric acid0.02
SIKA CORP SIKA SARNAFIL DIVSika AGCertain glycol ethers0.02
CALPINE FORE RIVER ENERGY CENTER LLCEnergy Capital PartnersPolycyclic aromatic compounds0.02
IRVING OIL TERMINALS INC.Irving OilNaphthalene0.01
HOLCIM - NER INC.Holcim GroupPolycyclic aromatic compounds0.01
INTERPLEX ETCH LOGIC LLCINTERPLEX INDUSTRIES INCChlorine0.01
AVEDIS ZILDJIAN CO.AVEDIS ZILDJIAN COCopper0.01
SIKA CORP SIKA SARNAFIL DIVSika AGAntimony compounds0.01
CERTAINTEED LLCSaint-GobainPolycyclic aromatic compounds0.01
ISP FREETOWN FINE CHEMICALS INCAshland Global HoldingsMaleic anhydride0.01
V&S TAUNTON GALVANIZING LLCHill & Smith Holdings PLCLead 0.01
ALNYLAM PHARMACEUTICALSAlnylam PharmaceuticalsAcetonitrile0.01
TECH-ETCH INCTECH ETCH INCLead compounds0.01
SCITUATE CONCRETE PIPESCITUATE CONCRETE PIPELead 0.01
CHELSEA SANDWICH LLCGlobal Partners LPNaphthalene0.01
GLINES & RHODES INCGLINES & RHODES INCLead compounds0.01
THE DOW CHEMICAL CODow Inc.Ethylbenzene0.00
ISP FREETOWN FINE CHEMICALS INCAshland Global HoldingsAcrylic acid0.00
AMETEK AEGISAmetekNitric acid0.00
NATIONAL COATING CORPCarlislePhenol0.00
CANAL GENERATING LLCJERALead compounds0.00
V&S TAUNTON GALVANIZING LLCHill & Smith Holdings PLCZinc compounds0.00
HOLCIM SOLUTIONS & PRODUCTS US LLCHolcim Groupn-Hexane (Hexane)0.00
TECH-ETCH INCTECH ETCH INCHydrogen fluoride (Hydrofluoric acid)0.00
METALOR TECHNOLOGIES USA CORP REFINING DIVTanaka Kikinzoku KogyoCyanide compounds0.00
SKYLINE COMPOSITESSKYLINE COMPOSITESStyrene0.00
GLOBAL COMPANIES LLCGlobal Partners LPNaphthalene0.00
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
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)Ethylbenzene0.00
ARISTON THERMO USA (PREV HEAT TRANSFER PRODUCTS)ARISTON THERMO USACopper0.00
AIRBORN ELECTRONICS INCAIRBORN INCLead 0.00
DARTMOUTH POWER ASSOCIATES L.P.Riverstone HoldingsNaphthalene0.00
CERTAINTEED LLCSaint-GobainLead 0.00
EXXON MOBIL CORP EVERETT TERMINALExxon MobilNaphthalene0.00
CDAERO LLCKnowles CorporationZinc compounds0.00
RUST-OLEUMRPM InternationalXylene (mixed isomers)0.00
CAPSTAN ATLANTICCAPSTAN ATLANTICCopper0.00
BORDEN & REMINGTON CORPBORDEN & REMINGTON CORPORATIONAmmonia (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
CERTAINTEED LLCSaint-GobainCopper compounds (this category does not include copper phthalocyanine compounds that are substituted with only hydrogen, and/or chlorine, and/or bromine.)0.00
SWIMEX INC.SWIMEX INC.Styrene0.00
EXXON MOBIL CORP EVERETT TERMINALExxon MobilEthylbenzene0.00
TL EDWARDS INC.TL EDWARDS INC.Polycyclic aromatic compounds0.00
CDAERO LLCKnowles CorporationZinc (fume or dust)0.00
IRVING OIL TERMINALS INC.Irving OilEthylbenzene0.00
DARTMOUTH POWER ASSOCIATES L.P.Riverstone Holdingsn-Hexane (Hexane)0.00
CLEAN HARBORS OF BRAINTREE INC.Clean Harbors Inc.Lead 0.00
GLOBAL COMPANIES LLCGlobal Partners LPEthylbenzene0.00
ISP FREETOWN FINE CHEMICALS INCAshland Global HoldingsVinyl acetate0.00
PREFERRED CONCRETE CORPPREFERRED CONCRETE CORPLead 0.00
CHECON LLCCHECON LLCSilver compounds0.00
CERTAINTEED LLCSaint-GobainZinc compounds0.00
WOLLASTON ALLOYSConsolidated Precision ProductsCopper0.00
CHEMGENES CORPCHEMGENES CORPChloroform0.00
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
HOLCIM SOLUTIONS & PRODUCTS US LLCHolcim GroupToluene0.00
THE DOW CHEMICAL CODow Inc.Xylene (mixed isomers)0.00
ULTRAAdvent InternationalLead compounds0.00
GULF OIL LP CHELSEA TERMINALRaceTrac PetroleumEthylbenzene0.00
TRESCA BROTHERS SAND & GRAVELTRESCA BROTHERS SAND & GRAVELLead 0.00
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)1,2,4-Trimethylbenzene0.00
CHELSEA SANDWICH LLCGlobal Partners LP1,2,4-Trimethylbenzene0.00
GULF OIL LP CHELSEA TERMINALRaceTrac PetroleumNaphthalene0.00
ACUSHNET CO BALL PLANT IIFila Holdings Corp.Methyl isobutyl ketone0.00
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)Xylene (mixed isomers)0.00
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
GLOBAL COMPANIES LLCGlobal Partners LPXylene (mixed isomers)0.00
ACUSHNET CO BALL PLANT IIIFila Holdings Corp.Methyl isobutyl ketone0.00
BORO SAND & STONE CORPBORO SAND & STONE CORPLead 0.00
3M CO3M CompanyToluene0.00
PRYSMIAN CABLES & SYSTEMS USAPrysmian GroupAntimony compounds0.00
NEWINGTON STATIONAtlas HoldingsPolycyclic aromatic compounds0.00
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)n-Hexane (Hexane)0.00
AFC CABLE SYSTEMSAtkore InternationalCopper0.00
THE DOW CHEMICAL CODow Inc.Propylene oxide0.00
PRYSMIAN CABLES & SYSTEMS USAPrysmian GroupLead compounds0.00
GULF OIL LP CHELSEA TERMINALRaceTrac Petroleum1,2,4-Trimethylbenzene0.00
ROLLS-ROYCE N.A. INC.Rolls-RoyceLead 0.00
3M CO3M CompanyMethanol0.00
IRVING OIL TERMINALS INC.Irving OilLead 0.00
GLOBAL COMPANIES LLCGlobal Partners LP1,2,4-Trimethylbenzene0.00
DARTMOUTH POWER ASSOCIATES L.P.Riverstone HoldingsEthylbenzene0.00
CERTAINTEED LLCSaint-GobainMercury0.00
EXXON MOBIL CORP EVERETT TERMINALExxon MobilXylene (mixed isomers)0.00
DARTMOUTH POWER ASSOCIATES L.P.Riverstone HoldingsBiphenyl0.00
ACUSHNET CO BALL PLANT IIFila Holdings Corp.Zinc compounds0.00
METALOR TECHNOLOGIES USA CORP REFINING DIVTanaka Kikinzoku KogyoNitric acid0.00
IRVING OIL TERMINALS INC.Irving OilXylene (mixed isomers)0.00
GULF OIL LP CHELSEA TERMINALRaceTrac PetroleumXylene (mixed isomers)0.00
GLOBAL COMPANIES LLCGlobal Partners LPPolycyclic aromatic compounds0.00
ISP FREETOWN FINE CHEMICALS INCAshland Global HoldingsToluene0.00
OCEAN SPRAY CRANBERRIES INCOCEAN SPRAY CRANBERRIES INCPolycyclic aromatic compounds0.00
VEOLIA ES TECHNICAL SOLUTIONSVeolia GroupMercury0.00
NATIONAL COATING CORPCarlisleMethanol0.00
HOLCIM - NER INC.Holcim GroupLead compounds0.00
TOPCOATStandard Industries Inc.Toluene0.00
CALLAHAN CHEMICAL CO LLCSK Capital PartnersCertain glycol ethers0.00
DYNASOL INCDYNASOL INCCertain glycol ethers0.00
GLOBAL COMPANIES LLCGlobal Partners LPn-Hexane (Hexane)0.00
GULF OIL LP CHELSEA TERMINALRaceTrac Petroleumn-Hexane (Hexane)0.00
SIEMENS HEALTHCARE DIAGNOSTICSSiemensMethanol0.00
INEOS STYROLUTION AMERICA LLCIneosStyrene0.00
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)Toluene0.00
IRVING OIL TERMINALS INC.Irving OilPolycyclic aromatic compounds0.00
IRVING OIL TERMINALS INC.Irving Oiln-Hexane (Hexane)0.00
ISP FREETOWN FINE CHEMICALS INCAshland Global HoldingsCertain glycol ethers0.00
IRVING OIL TERMINALS INC.Irving Oil1,2,4-Trimethylbenzene0.00
CALLAHAN CHEMICAL CO LLCSK Capital PartnersXylene (mixed isomers)0.00
EXXON MOBIL CORP EVERETT TERMINALExxon Mobil1,2,4-Trimethylbenzene0.00
OLYMPIC ADHESIVES INCOLYMPIC ADHESIVES INCPhenol0.00
EXXON MOBIL CORP EVERETT TERMINALExxon Mobiln-Hexane (Hexane)0.00
ISP FREETOWN FINE CHEMICALS INCAshland Global HoldingsEthyl acrylate0.00
LEACHGARNERLEACHGARNERSilver0.00
HOUGHTON CHEMICAL CORPHOUGHTON CHEMICAL CORPCertain glycol ethers0.00
HOUGHTON CHEMICAL CORPHOUGHTON CHEMICAL CORPEthylene glycol0.00
ALNYLAM PHARMACEUTICALSAlnylam PharmaceuticalsToluene0.00
TL EDWARDS INC.TL EDWARDS INC.Benzo[g,h,i]perylene0.00
GLOBAL COMPANIES LLCGlobal Partners LPToluene0.00
CYN OILClean Harbors Inc.Lead compounds0.00
DARTMOUTH POWER ASSOCIATES L.P.Riverstone Holdings1,2,4-Trimethylbenzene0.00
ISP FREETOWN FINE CHEMICALS INCAshland Global Holdingstert-Butyl alcohol (tert-Butanol)0.00
CHELSEA SANDWICH LLCGlobal Partners LPPolycyclic aromatic compounds0.00
GULF OIL LP CHELSEA TERMINALRaceTrac PetroleumToluene0.00
CYN OILClean Harbors Inc.Ethylene glycol0.00
IRVING OIL TERMINALS INC.Irving OilToluene0.00
DARTMOUTH POWER ASSOCIATES L.P.Riverstone HoldingsXylene (mixed isomers)0.00
GLOBAL COMPANIES LLCGlobal Partners LPBenzo[g,h,i]perylene0.00
CALLAHAN CHEMICAL CO LLCSK Capital PartnersToluene0.00
EXXON MOBIL CORP EVERETT TERMINALExxon MobilToluene0.00
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
CANAL GENERATING LLCJERABenzo[g,h,i]perylene0.00
METALOR TECHNOLOGIES USATanaka Kikinzoku KogyoMethanol0.00
GEM GRAVURE CO INC.GEM GRAVURE CO INCToluene0.00
INEOS STYROLUTION AMERICA LLCIneosMethyl methacrylate0.00
PRYSMIAN CABLES & SYSTEMS USAPrysmian GroupZinc compounds0.00
CERTAINTEED LLCSaint-GobainBenzo[g,h,i]perylene0.00
OLDCASTLE - ANCHORCRH PLCLead compounds0.00
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)Cyclohexane0.00
HOUGHTON CHEMICAL CORPHOUGHTON CHEMICAL CORPMethanol0.00
DARTMOUTH POWER ASSOCIATES L.P.Riverstone HoldingsCumene0.00
CITGO PETROLEUM CORPPDVSA (Petroleos de Venezuela S.A.)Cumene0.00
HOUGHTON CHEMICAL CORPHOUGHTON CHEMICAL CORPToluene0.00
TECH-ETCH INCTECH ETCH INCNitrate compounds (water dissociable; reportable only when in aqueous solution)0.00
CALLAHAN CHEMICAL CO LLCSK Capital PartnersEthylene glycol0.00
ECKART AMERICAAltanan-Butyl alcohol (1-Butanol)0.00
THE DOW CHEMICAL CODow Inc.Toluene0.00
TEI BIOSCIENCESIntegra LifeSciencesMethanol0.00
THE DOW CHEMICAL CODow Inc.Ethylene glycol0.00
HOUGHTON CHEMICAL CORPHOUGHTON CHEMICAL CORPXylene (mixed isomers)0.00
OCEAN SPRAY CRANBERRIES INCOCEAN SPRAY CRANBERRIES INCBenzo[g,h,i]perylene0.00
ZSCHIMMER & SCHWARZ INTERPOLYMERZSCHIMMER & SCHWARZMethyl methacrylate0.00
CALLAHAN CHEMICAL CO LLCSK Capital PartnersMethanol0.00
ISP FREETOWN FINE CHEMICALS INCAshland Global HoldingsCyclohexane0.00
RESILIENCE BOSTON INC.NATIONAL RESILIENCE INCEthylene glycol0.00
CALLAHAN CHEMICAL CO LLCSK Capital PartnersMethyl isobutyl ketone0.00
ZSCHIMMER & SCHWARZ INTERPOLYMERZSCHIMMER & SCHWARZStyrene0.00
CHEMGENES CORPCHEMGENES CORPn-Hexane (Hexane)0.00
CHELSEA SANDWICH LLCGlobal Partners LPBenzo[g,h,i]perylene0.00
IRVING OIL TERMINALS INC.Irving OilBenzo[g,h,i]perylene0.00
CHEMGENES CORPCHEMGENES CORPAcetonitrile0.00
ECKART AMERICAAltanaMethyl isobutyl ketone0.00
ENTEGRIS INCEntegrisDi(2-ethylhexyl) phthalate0.00
ENTEGRIS INCEntegrisMethanol0.00
ROHM & HAAS ELECTRONIC MATERIALS LLCDuPont de NemoursFormaldehyde0.00
ROHM & HAAS ELECTRONIC MATERIALS LLCDuPont de NemoursN-Methyl-2-pyrrolidone0.00
IDEAL TAPE COAmerican BiltriteToluene0.00
IDEAL TAPE COAmerican Biltriten-Hexane (Hexane)0.00
DYNASOL INCDYNASOL INCNonylphenol Ethoxylates0.00
CALLAHAN CHEMICAL CO LLCSK Capital PartnersN-Methyl-2-pyrrolidone0.00
CALLAHAN CHEMICAL CO LLCSK Capital PartnersNonylphenol Ethoxylates0.00
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