Synthetic stones, for gem stones and industrial use, manufacturing · California

Diamond Foundry LLC

South San Francisco, CA · ~95 workers · 3 years of OSHA Injury Tracking Application data.

A
Excellent Safety Record
0.7
Avg TCR
3.3
Industry avg
0
Fatalities
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The verdict

Diamond Foundry LLC runs at 20% of its industry's injury rate - far safer than the typical Synthetic stones, for gem stones and industrial use, manufacturing workplace, earning a grade A.

Diamond Foundry LLC: 0.7 TCR = 20% of Synthetic stones, for gem stones and industrial use, manufacturing BLS 3.3 · 3y Form 300A (see methodology below)

Diamond Foundry LLC safety composite

Diamond Foundry LLC scores strongest on total case rate (tcr) (safer than 88% of same-industry peers) and weakest on fatalities (safer than 50%), blended into one 0-100 breakdown against same-industry peers. A missing measure drops out and redistributes its weight rather than deflating the score. This is a per-dimension breakdown, distinct from the single letter grade above it (which weights TCR alone against the BLS industry benchmark).

C

74/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR)
B 0.65 per 100 workers

Safer than 88% of industry peers

DART rate
B 0 per 100 workers

Safer than 75% of industry peers

Fatalities
D 0

Safer than 50% of industry peers

Benchmarked live against every credibly-rated employer in the same NAICS industry code in the current OSHA extract (a segment must have at least 8 rated peers to benchmark). Not a legal or compliance determination; PlainSafetyScore's own weighting (TCR 40%, DART 35%, fatalities 25%).

Diamond Foundry LLC held a steady TCR band

Diamond Foundry LLC's TCR held near 0.1 from 0.9 in 2022 to 1.0 in 2024. In 2024, DART was 0× this establishment's average TCR (severity share of cases).

2022=0.9 · 2023=0.0 · 2024=1.0

OSHA ITA Form 300A scorecard

Establishment book 327999 · South San Francisco, CA AT/BELOW-IND · SMALL

Grade A · TCR 0.7 · 20% of ind

  • DART 0.0 DART
  • RANK #1/12
  • PHOTO NexTech Materials, Ltd
  • BOOK 3y book
  • INJ 2 inj
  • SIZE ~95 FTE

Nearest TCR peer: NexTech Materials, Ltd (0.0 TCR gap)

Read with this employer → · Industry book → · California employers → · Look up another →

Diamond Foundry LLC in the TCR neighbourhood

Average Total Case Rate among this establishment and nearest same-industry peers

TCR

What this shows Diamond Foundry LLC averages 0.7 TCR (20% of the Synthetic stones, for gem stones and industrial use, manufacturing BLS benchmark).

Source U.S. Department of Labor, OSHA Injury Tracking Application (Form 300A) As of 2026-08-25

Diamond Foundry LLC TCR series: 2022=0.9 · 2023=0 · 2024=1 · BLS 3.3

Where Diamond Foundry LLC falls in its industry

95 Synthetic stones, for gem ston establishments

Safer than 88% of graded establishments in this industry, whose median TCR is 2.2.

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #1 safest of 12 Synthetic stones, for gem ston employers in California.

Diamond Foundry LLC (95 employees, TCR 0.7) among 29 same-industry peers, split at the industry median of 61 employees and a TCR of 2.2 2×2 strategic matrix plotting 30 entities by Average employees (X) and Total Case Rate (Y), with a crosshair dividing the plot into four quadrants. Larger & higher-riskSmaller & higher-riskLarger & saferSmaller & safer than peers 0200400600 0510152025 Average employees Total Case Rate Diamond Foundry LLC
Diamond Foundry LLC (95 employees, TCR 0.7) among 29 same-industry peers, split at the industry median of 61 employees and a TCR of 2.2

Diamond Foundry LLC has more employees than the Synthetic stones, for gem stones and ind median and a lower injury rate than the industry's median TCR of 2.2. Workforce size and injury rate do not always move together within the same industry -- some of its smaller peers run higher rates than its larger ones, and vice versa.

Year-by-Year Safety Data

Year TCR DART Injuries Illnesses Fatalities
2024 1.0 0.0 1 0 0
2023 0.0 0.0 0 0 0
2022 0.9 0.0 1 0 0

OSHA ITA peer cross-reference

Establishment peer ledger

327999 · CA · South San Francisco

95 Synthetic stones, for gem stones and industrial use, manufacturing employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 136 employers in South San Francisco, CA · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel Establishment Metric
NAICS-TCR NexTech Materials, Ltd 0.7 TCR
NAICS-TCR Quartzdyne Inc. 0.6 TCR
NAICS-TCR Purification Cellutions, LLC. 0.6 TCR
NAICS-TCR Pompano Beach Drymix 0.6 TCR
STATE-SIZE Del Llano Farms 95 FTE
STATE-SIZE Los Altos Farms, LLC 95 FTE
STATE-SIZE TreeSource 95 FTE
STATE-SIZE Costa View Farms 2 (Madera) 95 FTE
CITY-NEAR Genentech SSF 13,259 FTE
CITY-NEAR 2032-02120951 1,497 FTE
CITY-NEAR Aspiranet 1,182 FTE
CITY-NEAR 0206-02620951 1,178 FTE
NAT-TCR Shelton Energy Solutions, LLC 0.7 TCR
NAT-TCR Headquarters WSDOT 0.7 TCR
NAT-TCR Prima Power Laserdyne 0.7 TCR
NAT-TCR 20923 Little Rock 0.7 TCR
NAT-SIZE Ndx Twin Cities Laboratories 95 FTE
NAT-SIZE Bell Minor Home 95 FTE
NAT-SIZE WTA 71st Operations 95 FTE
NAT-SIZE Bennett Pump Company 95 FTE

Rel codes: NAICS-TCR · STATE-SIZE · CITY-NEAR · NAT-TCR/NAT-SIZE cross-state. Read with this employer →

Data Source: OSHA Injury Tracking Application (ITA), mandatory establishment-level injury/illness reports. Grades compare employer Total Case Rate (TCR) to BLS IIF industry benchmarks. Data covers years reported by this establishment: 2024, 2023, 2022. This is publicly available government data - not a legal determination of workplace conditions.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from official public datasets. See our methodology for details.