Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
HANSON AGGREGATES PACIFIC SOUT HWEST
734 TWIN OAKS VALLEY RD, SAN MARCOS, CA, 92069
Parent company: HANSON PLC
Carcinogen
PBT
— EPA classifications across all reporting years
Top chemical totals
The 10 chemicals with the highest cumulative on-site releases in pounds (lbs) across all available years.
Full release table
Rows are years. Columns show the five highest-total chemicals across all years plus each year's total release volume.
| All values in pounds (lbs) | ||||||
|---|---|---|---|---|---|---|
| Year | Lead compounds | Polycyclic aromatic compounds | Total (lbs) | |||
| 2005 | 1 | 0 | 1 | |||
| 2004 | — | 0 | 0 | |||
▎ Facilities report to EPA's TRI once they manufacture, process, or use a listed chemical above set thresholds. Once that threshold is crossed, they must report actual releases regardless of size — so a small number reflects genuine low-level discharge, not a data error.