EPA TRI Facility · Computers and Electronic Products
Sierra Circuits Inc (dba Sierra Proto Express)
Sunnyvale, CA
- Total releases
- 95.3K lbs
- Chemicals reported
- 3
- Latest report
- 2023
- Primary pathway
- Off-site Transfers
OFFSITE Form-R mix
Sierra Circuits Inc (dba Sierra Proto Express): how the 95.3K lbs splits
95.3K lbs across all reported pathways
- Off-site Transfers 95.3K lbs 100.0%
- Air Releases 30 lbs <0.1%
Sierra Circuits Inc (dba Sierra Proto Express)'s 95.3K lbs Form-R total is OFFSITE - off-site transfers is 100.0% of the bar. Next segment: air releases at <0.1%. Leading chemical by pounds: Copper compounds.
LIGHT volume OFFSITE pathway CLEAN
Sierra Circuits Inc (dba Sierra Proto Express) is an EPA Toxics Release Inventory reporter in Sunnyvale, CA, in the computers and electronic products sector. It reported 20.2K lbs of releases across 3 chemicals in 2023, and 95.3K lbs in total across its 2019-2023 reporting years. That ranks 4,690 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In California's 1,149 reporting TRI sites, pounds #1 is not chemical-count #1. Sierra Circuits Inc (dba Sierra Proto Express) is pounds #151 and chemical-count #385 at 95.3K lbs. Clean Harbors Buttonwillow LLC leads reported pounds (50.4M lbs) at 45 chemicals (chemical-count #2). Chevron Products Co Richmond Refinery leads chemical count at 46 chemicals (3.0M lbs, pounds #13). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Northrop Grumman Systems Corp; Lockheed Martin Space Systems Co; Infinera Corp; Bloom Energy Corp. Similar-scale Computers and Electronic Products peers outside California: Sheldahl Flexible Technologies Inc; Avago Technologies Inc Fort Collins Colorado; Towerjazz Texas; Drs Nis LLC. Largest disclosed chemicals by pounds: Copper compounds; Nitric acid; Lead compounds.
Compare Sierra Circuits Inc (dba Sierra Proto Express) with
Nearest reporters in California
- Northrop Grumman Systems Corp Sunnyvale · 3.6K lbs
- Lockheed Martin Space Systems Co Sunnyvale · 2.8K lbs
- Infinera Corp Sunnyvale · 13.3K lbs
- Bloom Energy Corp Sunnyvale · 272 lbs
Similar-scale Computers and Electronic Products sites elsewhere: Sheldahl Flexible Technologies Inc (MN) · Avago Technologies Inc Fort Collins Colorado (CO) · Towerjazz Texas (TX)
Sierra Circuits Inc (dba Sierra Proto Express) stamps LIGHT volume with a dominant OFFSITE pathway (100.0% off-site transfers) across 3 chemicals. Cumulative Form-R extract: 95.3K lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Sheldahl Flexible Technologies Inc and Avago Technologies Inc Fort Collins Colorado.
Sierra Circuits Inc (dba Sierra Proto Express) vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
95K lbs Top 18% higher than 82% 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
Sierra Circuits Inc (dba Sierra Proto Express): Copper compounds-led volume
Among the 760 Computers and Electronic Products facilities in this database, Sierra Circuits Inc (dba Sierra Proto Express) reports the 63rd-largest volume, placing it in the top 8.3% of its sector. Its reported volume is concentrated rather than spread: Copper compounds alone is more than 99.9% of the total. Scale peers outside California include Sheldahl Flexible Technologies Inc and Avago Technologies Inc Fort Collins Colorado.
Concentrated means ≥60% of Sierra Circuits Inc (dba Sierra Proto Express)'s pounds in one chemical - here Copper compounds at more than 99.9%. Not a toxicity score.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Sierra Circuits Inc (dba Sierra Proto Express)'s total reported releases fell from 21.3 thousand lb in 2022 to 20.2 thousand lb in 2023, based on EPA TRI filings.
- Sierra Circuits Inc (dba Sierra Proto Express)'s off-site transfers fell from 21.3 thousand lb in 2022 to 20.2 thousand lb in 2023, based on EPA TRI filings.
Sierra Circuits Inc (dba Sierra Proto Express) Form-R facts
Compare this facility
See how Sierra Circuits Inc (dba Sierra Proto Express) stacks up against nearby facilities and the typical reporter.
26.4× more than the comparison
About the same as 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 Sierra Circuits Inc (dba Sierra Proto Express) releases toxic chemicals into the environment. Total: 95.3K lbs.
Emissions Trend Summary
From 2019 to 2023, total releases increased by 38% (14.6K lbs to 20.2K lbs).
Sierra Circuits Inc (dba Sierra Proto Express): annual Form-R pounds
LIGHT site · OFFSITE pathway · TRI years 2019–2023
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Sierra Circuits Inc (dba Sierra Proto Express) year-over-year reported totals (increased by 38% 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: Copper compounds.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 14.6K lbs | 3 |
| 2020 | 18.7K lbs | 3 |
| 2021 | 20.5K lbs | 3 |
| 2022 | 21.3K lbs | 3 |
| 2023 | 20.2K lbs | 3 |
Chemical Releases
Aggregated across all reporting years (2019–2023). Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Copper compounds | 95.3K lbs | - |
| Nitric acid | 30 lbs | - |
| Lead compounds | 0 lbs | - |
Sierra Circuits Inc (dba Sierra Proto Express) · OFFSITE-pathway site
Nearest TRI Facilities to Sierra Circuits Inc (dba Sierra Proto Express)
Closest other reporters in California - including Northrop Grumman Systems Corp, Lockheed Martin Space Systems Co, Infinera Corp, ordered by distance.
Showing 8 of 1,148 other reporting facilities in California.
Similar Computers and Electronic Products Facilities
Other Computers and Electronic Products facilities with similar total release volumes (±80%), outside California - e.g. Sheldahl Flexible Technologies Inc, Avago Technologies Inc Fort Collins Colorado, Towerjazz Texas.
Compare beyond California
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Sierra Circuits Inc (dba Sierra Proto Express) on cumulative reported pounds (95.3K lbs) and distinct chemical count (3). Release-pound peers include Fountain Plating Co LLC, M&b Metal Products, US Dod Usaf Cannon Afb Melrose Range. Chemical-count peers include Industrial C&s of Pr LLC Arecibo Plant, Island Litho Corp., Fenwal International Inc. Neighborhoods are forced disjoint so each axis surfaces a different set of sites.
Similar reported release pounds
Nearest out-of-state reporters (≥1,000 lbs) by absolute TRI pounds, not same-industry or same-county neighbors.
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
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 Copper compounds, Nitric acid, Lead compounds; nearby reporters include Northrop Grumman Systems Corp. Sierra Circuits Inc (dba Sierra Proto Express) stamps LIGHT volume · OFFSITE pathway · CLEAN 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 Sierra Circuits Inc (dba Sierra Proto Express) TRI extract (LIGHT · OFFSITE · CLEAN · lead Copper compounds) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Sierra Circuits Inc (dba Sierra Proto Express) totals are self-reported EPCRA §313 estimates for Sunnyvale, CA, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 334412 · Computers and Electronic Products. 6.0% of Santa Clara TRI pounds in this extract. Nearest ABS peer: Fountain Plating Co LLC (Δ 38 lbs). Pounds ≠ exposure.
Sierra Circuits Inc (dba Sierra Proto Express) stamps LIGHT volume · OFFSITE pathway · CLEAN · lead Copper 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