Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
METRO MACHINE CORP. DBA GENERAL DYNAMICS NASSCO-NORFOLK
200 LIGON ST, NORFOLK, VA, 23523
Parent company: GENERAL DYNAMICS
Carcinogen
— 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 | n-Butyl alcohol | Xylene (mixed isomers) | Copper compounds | Copper | Zinc compounds | Total (lbs) |
| 2011 | 4,755 | 5,939 | — | — | — | 10,694 |
| 2010 | 8,840 | — | — | — | — | 8,840 |
| 2004 | 9,170 | — | — | — | — | 9,170 |
| 2003 | 26,628 | — | — | — | — | 26,628 |
| 2001 | 12,761 | — | — | — | — | 12,761 |
| 1996 | 23,234 | — | — | — | — | 23,234 |
| 1993 | 27,903 | — | 6,351 | — | 2,120 | 36,374 |
| 1992 | 40,006 | 31,635 | 8,918 | 817 | 3,776 | 85,152 |
| 1991 | 26,157 | 4,934 | 2,459 | — | — | 34,689 |
| 1990 | 40,903 | 19,683 | — | 8,437 | — | 69,023 |
| 1989 | 16,857 | 4,882 | — | 3,391 | — | 25,130 |
| 1988 | 30,397 | 6,003 | — | — | — | 36,400 |
▎ 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.