EPA TRI Facility · Nonmetallic Mineral Product
Hawaiian Rock Products-Guam
Mangilao, GU · Parent: Mcc Development Corp
- Total releases
- 187 lbs
- Chemicals reported
- 4
- Carcinogens
- 1
- Primary pathway
- Land Disposal
LAND Form-R mix
Hawaiian Rock Products-Guam: how the 187 lbs splits
187 lbs across all reported pathways
- Land Disposal 146 lbs 78.1%
- Air Releases 41 lbs 21.9%
Hawaiian Rock Products-Guam's 187 lbs Form-R total is LAND - land disposal is 78.1% of the bar. Next segment: air releases at 21.9%. Leading chemical by pounds: Lead And Lead Compounds.
TRACE volume LAND pathway CARC-LEAN
Hawaiian Rock Products-Guam is an EPA Toxics Release Inventory reporter in Mangilao, GU, in the nonmetallic mineral product sector. It reported 37 lbs of releases across 3 chemicals in 2023, and 187 lbs in total across its 2019-2023 reporting years. That ranks 15,918 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Guam's 10 reporting TRI sites, pounds #1 is not chemical-count #1. Hawaiian Rock Products-Guam is pounds #10 and chemical-count #7 at 187 lbs. Naval Base Guam-Apra Harbor WWTP leads reported pounds (1.1M lbs) at 1 chemicals (chemical-count #10). Mobil Oil Guam Inc (cabras Island Terminal) leads chemical count at 14 chemicals (13.6K lbs, pounds #5). Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Andersen Air Force Base (us Air Force); Dededo Combustion Turbine Generating Facility; Yigo Power Plant; Naval Base Guam-Apra Harbor WWTP. Similar-scale Nonmetallic Mineral Product peers outside Guam: Oldcastle - Anchor; Oldcastle Infrastructure - North Houston; Avondale Ready-Mix Batch Plant; Builders Choice. Other Mcc Development Corp sites in this extract: Gardena Plant 25; Moreno Valley Plant 2; Rialto Plant 24; Sun City Plant 8. Largest disclosed chemicals by pounds: Lead And Lead Compounds; Lead compounds; Polycyclic aromatic compounds; Benzo[g,h,i]perylene.
Hawaiian Rock Products-Guam stamps TRACE volume with a dominant LAND pathway (78.1% land disposal) across 4 chemicals · 1 carcinogen-classified. Cumulative Form-R extract: 187 lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Oldcastle - Anchor and Oldcastle Infrastructure - North Houston.
Hawaiian Rock Products-Guam vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
187 lbs 39th percentile higher than 39% of 25,986 reporting TRI facilities
Each bar is a $1M-wide band; taller bars hold more reporting TRI facilities. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
Hawaiian Rock Products-Guam in the Nonmetallic Mineral Product sector extract
Among the 3,265 Nonmetallic Mineral Product facilities in this database, Hawaiian Rock Products-Guam reports the 834th-largest volume (187 lbs). Scale peers outside Guam include Oldcastle - Anchor and Oldcastle Infrastructure - North Houston.
Sector rank uses reported TRI pounds only. Share callouts need ≥1,000 lbs so tiny totals cannot mint a false signal.
Hawaiian Rock Products-Guam Form-R facts
Compare this facility
See how Hawaiian Rock Products-Guam stacks up against nearby facilities and the typical reporter.
99% less than the comparison
33% more than the comparison
Comparison reflects reported pounds and chemical counts, not toxicity or health risk. Averages cover facilities reporting any release.
How does this facility release toxic chemicals?
How Hawaiian Rock Products-Guam releases toxic chemicals into the environment. Total: 187 lbs.
Emissions Trend Summary
From 2019 to 2023, total releases increased by 1% (36 lbs to 37 lbs).
Hawaiian Rock Products-Guam: annual Form-R pounds
TRACE site · LAND pathway · TRI years 2019–2023
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Hawaiian Rock Products-Guam year-over-year reported totals (increased by 1% from 2019 to 2023). TRI figures are self-reported estimates and can swing with production, waste handling, and reporting changes, not only with controls. Lead chemical in the extract: Lead And Lead Compounds.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 36 lbs | 3 |
| 2020 | 30 lbs | 3 |
| 2021 | 44 lbs | 3 |
| 2022 | 41 lbs | 3 |
| 2023 | 37 lbs | 3 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 1 of 4 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Lead And Lead Compounds | 132 lbs | - |
| Lead compounds | 38 lbs | - |
| Polycyclic aromatic compounds | 17 lbs | Carcinogen |
| Benzo[g,h,i]perylene | 0 lbs | - |
Hawaiian Rock Products-Guam · LAND-pathway site
Nearest TRI Facilities to Hawaiian Rock Products-Guam
Closest other reporters in Guam - including Andersen Air Force Base (us Air Force), Dededo Combustion Turbine Generating Facility, Yigo Power Plant, ordered by distance.
Showing 8 of 9 other reporting facilities in Guam.
Similar Nonmetallic Mineral Product Facilities
Other Nonmetallic Mineral Product facilities with similar total release volumes (±80%), outside Guam - e.g. Oldcastle - Anchor, Oldcastle Infrastructure - North Houston, Avondale Ready-Mix Batch Plant.
Other Mcc Development Corp Facilities
Same-parent TRI sites ranked by reported releases - including Gardena Plant 25, Moreno Valley Plant 2, Rialto Plant 24.
About TRI Data
Data as of 2023 reporting year. Source: U.S. Environmental Protection Agency (EPA) Toxic Release Inventory.
On this page the largest disclosed chemicals include Lead And Lead Compounds, Lead compounds, Polycyclic aromatic compounds, Benzo[g,h,i]perylene; nearby reporters include Andersen Air Force Base (us Air Force). Hawaiian Rock Products-Guam stamps TRACE volume · LAND pathway · CARC-LEAN carcinogen-lbs on this Form-R extract. Totals are self-reported estimates under EPCRA §313, not measured stack emissions or a health-risk score.
Use and verify this record
This Hawaiian Rock Products-Guam TRI extract (TRACE · LAND · CARC-LEAN · lead Lead And Lead Compounds) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Hawaiian Rock Products-Guam totals are self-reported EPCRA §313 estimates for Mangilao, GU, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 327320 · Nonmetallic Mineral Product. 0.0% of Guam TRI pounds in this extract. Nearest ABS peer: Halliburton Monahans Baroid (Δ 0 lbs). Pounds ≠ exposure.
Hawaiian Rock Products-Guam stamps TRACE volume · LAND pathway · CARC-LEAN · lead Lead And Lead Compounds. PlainEnviro renders this EPA Form-R extract from its pipeline; no figure is typed in by an editor. Corrections: editorial policy.
All federal data sources used on this page
- EPA Toxics Release Inventory (TRI) Basic Data Files - annual self-reported chemical-release filings. epa.gov
- EPA TRI Program reference - how chemicals and reported releases are counted. epa.gov
- EPA Facility Registry Service - facility location and identity. epa.gov
- EPA ECHO - regulatory and compliance context. epa.gov
- EPA Envirofacts - the EPA data warehouse exposing these datasets. epa.gov