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Superfund / NPL site · EPA Superfund SEMS through latest publishNPL Deleted

Sand Creek Industrial

This site has been deleted from the EPA Superfund National Priorities List — EPA's classification means construction-complete cleanup objectives were achieved, though monitoring may continue. Most-cited contaminant of concern: 1,1,1-Trichloroethane.

33Rd And Dahlia, Commerce City, Colorado · ZIP 80022 · EPA ID COD980717953

See Adams ContaminantsEquity contextHow we read Superfund data
CLEANUP TIMELINE

Listing-date and cleanup-phase enrichment from EPA's per-site SEMS profile is queued for a follow-up ingest pass. Until then, this section will populate from EPA's published timeline data.

Anomaly engine

Notable Signals

No notable signals at this Superfund site for the current ingest. Cleanup-phase and SEMS-action flags are deferred to a follow-up engineering pass.

Contaminants of concern · per EPA SEMS

What's In This Site

Each row pairs a contaminant with the medium it was found in (the exposure pathway). Hover any named contaminant for an agency-cited health-risk summary. Cited count = number of SEMS decision records (RODs and related) that name the pair.

ContaminantPathwayCited
1,1,1-TrichloroethaneHealth riskMethyl chloroform. CNS depressant; ozone-depleting substance phased out under Montreal Protocol. EPA MCL 200 µg/L. (EPA, ATSDR)Groundwater2
1,1-DichloroetheneHealth riskVinylidene chloride; IARC Group 3 (inadequate evidence in humans) but liver toxic in animal studies; common TCE/PCE biodegradation product. (IARC, EPA)Groundwater2
1,2-Dichloroethene (Cis And Trans Mixture)Groundwater2
2,4-Dichlorophenoxyacetic AcidSoil2
AntimonyHealth riskInhaled antimony trioxide is an IARC Group 2B possible carcinogen; respiratory and cardiovascular effects from long-term exposure. EPA MCL 6 µg/L. (IARC, EPA)Groundwater2
ArsenicHealth riskIARC Group 1 carcinogen via inhalation and ingestion. EPA MCL 10 µg/L; chronic exposure causes skin, lung, bladder cancer and cardiovascular disease. (IARC, EPA, ATSDR)Groundwater2
ArsenicHealth riskIARC Group 1 carcinogen via inhalation and ingestion. EPA MCL 10 µg/L; chronic exposure causes skin, lung, bladder cancer and cardiovascular disease. (IARC, EPA, ATSDR)Soil2
BenzeneHealth riskIARC Group 1 carcinogen. Long-term inhalation causes leukemia and bone-marrow disorders. (IARC, EPA)Groundwater2
CadmiumGroundwater2
ChlordaneHealth riskIARC Group 2B possible carcinogen; neurotoxin; banned for most uses in 1988 but residues persist. (IARC, EPA)Soil2
Chloroethene (Vinyl Chloride)Health riskIARC Group 1 carcinogen — angiosarcoma of the liver. Final TCE/PCE biodegradation product; commonly found in groundwater plumes. EPA MCL 2 µg/L. (IARC, EPA)Groundwater2
ChloroformGroundwater2
ChromiumHealth riskHexavalent chromium (Cr-VI) is an IARC Group 1 carcinogen via inhalation, causing lung cancer; trivalent chromium is far less toxic. (IARC, EPA)Soil2
DieldrinHealth riskIARC Group 3 (inadequate evidence) but EPA classifies as 'probable human carcinogen'; neurotoxin and persistent organic pollutant. (EPA, ATSDR)Soil2
HeptachlorHealth riskIARC Group 2B possible carcinogen; metabolizes to heptachlor epoxide. (IARC, EPA)Soil2
NaphthaleneHealth riskIARC Group 2B possible carcinogen; causes hemolytic anemia, especially in infants. (IARC)Groundwater2
P,P'-DdtHealth riskIARC Group 2A probable carcinogen; persistent bioaccumulator; banned in the US in 1972 but residues persist in soil and sediment. (IARC, EPA)Soil2
Trans-1,2-DichloroetheneHealth riskTCE biodegradation intermediate. EPA MCL 100 µg/L; lower toxicity than parent solvents but commonly co-occurs in groundwater plumes. (EPA)Groundwater2
TrichloroetheneHealth riskTCE. IARC Group 1 carcinogen — kidney cancer; suspected liver cancer and non-Hodgkin lymphoma. EPA MCL 5 µg/L; common DNAPL groundwater plume contaminant. (IARC, EPA, ATSDR)Groundwater2
1,1,1-TrichloroethaneHealth riskMethyl chloroform. CNS depressant; ozone-depleting substance phased out under Montreal Protocol. EPA MCL 200 µg/L. (EPA, ATSDR)Free-phase NAPL1
1,1,1-TrichloroethaneHealth riskMethyl chloroform. CNS depressant; ozone-depleting substance phased out under Montreal Protocol. EPA MCL 200 µg/L. (EPA, ATSDR)Surface Water1
1,1,2-TrichloroethaneGroundwater1
1,1-DichloroetheneHealth riskVinylidene chloride; IARC Group 3 (inadequate evidence in humans) but liver toxic in animal studies; common TCE/PCE biodegradation product. (IARC, EPA)Air1
1,1-DichloroetheneHealth riskVinylidene chloride; IARC Group 3 (inadequate evidence in humans) but liver toxic in animal studies; common TCE/PCE biodegradation product. (IARC, EPA)Free-phase NAPL1
1,1-DichloroetheneHealth riskVinylidene chloride; IARC Group 3 (inadequate evidence in humans) but liver toxic in animal studies; common TCE/PCE biodegradation product. (IARC, EPA)Surface Water1
1,2-DichloroethaneHealth riskIARC Group 2B possible carcinogen; liver and kidney toxic. EPA MCL 5 µg/L. (IARC, EPA)Groundwater1
1,2-DichloroethaneHealth riskIARC Group 2B possible carcinogen; liver and kidney toxic. EPA MCL 5 µg/L. (IARC, EPA)Surface Water1
1,2-Dichloroethene (Cis And Trans Mixture)Free-phase NAPL1
1,2-DichloropropaneGroundwater1
1,2-DichloropropaneSurface Water1

Showing the top 30 pairs by SEMS citation count. 63 additional (contaminant, pathway) pairs are recorded for this site.

Drinking-water linkage · SDWIS

Groundwater Systems Serving Communities Within 3 Miles

The 31 systems below draw on groundwater (or mixed sources) and serve communities whose centroid sits within 3 miles of this site. Distance is to the served-city centroid — SDWIS does not expose individual wellhead locations, so this is a proximity screen, not a wellhead-impact assessment.

Water systemServesDistancePopulation servedSourceStatus
Eastern Adams Co Md MunicipalDenver3.0 mi2,485GROUNDWATERIn compliance
Valley Vista Estates PrivateDenver3.0 mi51GROUNDWATERIn compliance
Pinon Pines Property Llc PrivateDenver3.0 mi100GROUNDWATERIn compliance
Excell Lawson Village PrivateDenver3.0 mi90GROUNDWATERUNRESOLVED
Valli Hi Mhp PrivateDenver3.0 mi50GROUNDWATERIn compliance
Foxhill Md PrivateDenver3.0 mi123GROUNDWATERIn compliance
Mountain Valley Mhp PrivateDenver3.0 mi338GROUNDWATERIn compliance
Idledale Wsd MunicipalDenver3.0 mi350MIXEDUNRESOLVED
Deep Creek Mountain Valley Estates PrivateDenver3.0 mi31GROUNDWATERUNRESOLVED
Deep Creek Creede Haven MunicipalDenver3.0 mi86GROUNDWATERUNRESOLVED
Palms Of Archer PrivateDenver3.0 mi1,092GROUNDWATERIn compliance
Spring Hill Mhp PrivateDenver3.0 mi764GROUNDWATERIn compliance
Four Seasons Mobile Home Park PrivateDenver3.0 mi600GROUNDWATERIn compliance
Harvest Estates (Formerly Bills Mhp) PrivateDenver3.0 mi40GROUNDWATERIn compliance
Country Acres Mhp (La Salle County) PrivateDenver3.0 mi222GROUNDWATERIn compliance
Meadow Streams Estates PrivateDenver3.0 mi293GROUNDWATERIn compliance
Dutch Hills PrivateDenver3.0 mi620GROUNDWATERIn compliance
Old Orchard Estates PrivateDenver3.0 mi296GROUNDWATERIn compliance
Mason Manor PrivateDenver3.0 mi630GROUNDWATERIn compliance
Cranberry Lake Mhc PrivateDenver3.0 mi820GROUNDWATERIn compliance
Groveland Manor PrivateDenver3.0 mi435GROUNDWATERIn compliance
Pinewood On The Lake Mhp PrivateDenver3.0 mi950GROUNDWATERIn compliance
Yankee Springs Meadows PrivateDenver3.0 mi710GROUNDWATERIn compliance
West Olive Estates PrivateDenver3.0 mi1,850GROUNDWATERIn compliance
Canterbury Estates Mhp PrivateDenver3.0 mi350GROUNDWATERIn compliance
Fsi Holly Hills Property Llc PrivateDenver3.0 mi435GROUNDWATERIn compliance
Capital Crossings PrivateDenver3.0 mi345GROUNDWATERIn compliance
Timberland Mhc PrivateDenver3.0 mi200GROUNDWATERIn compliance
Raintree Estates PrivateDenver3.0 mi489GROUNDWATERIn compliance
Northwest Pines Mobile Home Community PrivateDenver3.0 mi990GROUNDWATERIn compliance
Aledo Mobile Home Park PrivateDenver3.0 mi423GROUNDWATERIn compliance

Methodology: served-city centroid (TIGER 2020) is used as the PWS coordinate. Source-water classification from SDWIS primary_source_code; only groundwater and mixed-source systems are queried. Click any system above for its full SDWIS profile.

Equity context · ACS 2018-2022 block-group demographics

Who Lives Near This Site

Within 1 mile of this site (4 Census block groups, population-weighted demographics): a population of 4,762. Why we surface this →

POPULATION SHARE
44.6%

Low-income

POPULATION SHARE
78.6%

People of color

POPULATION SHARE
10.3%

Under age 5

POPULATION SHARE
6.6%

Over age 64

Source: Census ACS 2018-2022 block-group demographics, population-weighted across the 1-mile buffer around this site (from USEPA-clone/EJAM-open blockgroupstats). NPL site proximity contributes to the national EJ pattern; indicator-level percentile and disparity scores are surfaced on the county page and the state page.

Source. EPA Superfund Enterprise Management System (SEMS) · retrieved 2026-05-07. SEMS is a federal public-domain dataset under 17 USC §105.

What this is not. We report EPA's published Superfund record — site listing, status, and contaminants of concern as named in EPA's decision documents. We do not perform site visits, independent air or water sampling, or current-state health-risk assessment. NPL listing reflects EPA's Hazard Ranking Score at a point in time; it does not by itself describe present-day exposure.