Mission Valley Rock
Total reported releases 8 lb rose meaningfully year over year (+26%). Total releases concentrations have more than doubled since 2013.
7999 ATHENOUR WAY, Sunol, California · 324121 · Petroleum · operated by Martin Marietta Materials INC
Notable Signals
No notable signals at this facility for the current reporting year. See chemicals and equity context below for the full picture.
What This Facility Releases
Zinc compounds
Zinc compounds concentrations have fallen 23% since 2022.
Aluminum (fume or dust)
Aluminum (fume or dust) concentrations have more than halved since 2018.
Lead compounds
Lead compounds concentrations have fallen 33% since 2018.
Polycyclic aromatic compounds
Polycyclic aromatic compounds volumes here are too small to anchor a multi-year trend; YoY movement is still shown above.
Mercury compounds
Mercury compounds volumes here are too small to anchor a multi-year trend; YoY movement is still shown above.
Benzo[g,h,i]perylene
Benzo[g,h,i]perylene volumes here are too small to anchor a multi-year trend; YoY movement is still shown above.
Who Lives Next To This Facility
Alameda County County, CA (no Census block groups within 3 miles — falling back to containing county): a population of 1,663,823. Why we surface this →
Low-income
People of color
Under age 5
Over age 64
Source: Census ACS 2018-2022 (5-year), county-level fallback. Indicator-level percentile and EJ-disparity scores are surfaced on the county page and the state page — they describe wider regional exposure burdens, not effects attributable to a single facility.
Source. EPA Toxics Release Inventory · retrieved 2026-05-07. Reporting year 2024. TRI is a federal public-domain dataset under 17 USC §105.
What this is not. TRI quantifies releases reported by the facility under EPCRA §313 — not ambient air or water concentrations measured at receptors. We do not attribute individual health outcomes to specific facilities; that exceeds what the data can support.