Rulers, plastics, manufacturing · California

Merrick Engineering, Inc

Name: Merrick Engineering, Inc Workplace Safety Data
Creator: PlainSafetyScore
License: https://creativecommons.org/publicdomain/zero/1.0/

Corona, CA · ~189 workers · 3 years of OSHA Injury Tracking Application data.

Compiled by PlainSafetyScore · August 25, 2026

D
Poor Safety Record: 4.2
Avg TCR: 3.3
Industry avg: 0
Fatalities

Subscribe to safety-record updates (RSS)

The verdict

Merrick Engineering, Inc runs at 127% of its industry's injury rate - more dangerous than the typical Rulers, plastics, manufacturing workplace, earning a grade D.

Merrick Engineering, Inc: 4.2 TCR = 127% of Rulers, plastics, manufacturing BLS 3.3 · 3y Form 300A (see methodology below)

Merrick Engineering, Inc safety composite

Merrick Engineering, Inc scores strongest on fatalities (safer than 50% of same-industry peers) and weakest on dart rate (safer than 11%), 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).

32/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR): D 4.18 per 100 workers

Safer than 40% of industry peers
DART rate: F 6.33 per 100 workers

Safer than 11% 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%).

Rising injury rate

Merrick Engineering, Inc: 1.7 → 6.3 TCR

Peak year 2024 @ 6.3 TCR · DART/TCR 1.51× in 2024

Merrick Engineering, Inc's TCR rose 4.6 from 1.7 in 2016 to 6.3 in 2024. In 2024, DART was 1.51× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 326199 · Corona, CA ABOVE-IND · MID

Grade D · TCR 4.2 · 127% of ind

DART 6.3 DART
RANK #55/117
PHOTO Dinesol Plastics Inc…
BOOK 3y book
INJ 19 inj
SIZE ~189 FTE

Nearest TCR peer: Dinesol Plastics Inc-Meridian (0.0 TCR gap)

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

This site

4.2
Dinesol Plasti

4.2
Affinity Custo

4.2
Whitefield Pla

4.2
Mauser Packagi

4.2

What this shows Merrick Engineering, Inc averages 4.2 TCR (127% of the Rulers, plastics, manufacturing BLS benchmark).

Merrick Engineering, Inc TCR series: 2016=1.7 · 2019=4.5 · 2024=6.3 · BLS 3.3

Where Merrick Engineering, Inc falls in its industry

2,838 Rulers, plastics, manufacturin establishments

Safer than 40% of graded establishments in this industry, whose median TCR is 3.5.

Grade D

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #55 safest of 117 Rulers, plastics, manufacturin employers in California.

Merrick Engineering, Inc (189 employees, TCR 4.2) among 29 same-industry peers, split at the industry median of 101 employees and a TCR of 3.5

Merrick Engineering, Inc has more employees than the Rulers, plastics, manufacturing median and a higher injury rate than the industry's median TCR of 3.5. 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
2024	6.3	6.3	9
2019	4.5	4.5	7
2016	1.7	1.7	3

OSHA ITA peer cross-reference

Establishment peer ledger

326199 · CA · Corona

2,838 Rulers, plastics, manufacturing employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 409 employers in Corona, CA · 4 cross-state NAT-TCR peers · 4 cross-state NAT-SIZE peers. Closest matches by relationship code are listed below.

Rel	Establishment	Place	Metric
NAICS-TCR	Dinesol Plastics Inc-Meridian	YOUNGSTOWN, OH	4.2 TCR
NAICS-TCR	Affinity Custom Molding, Inc.	MENDON, MI	4.2 TCR
NAICS-TCR	Whitefield Plastics Corporation	HOUSTON, TX	4.2 TCR
NAICS-TCR	Mauser Packaging Solutions	ATLANTA, GA	4.2 TCR
STATE-SIZE	Fallbrook	FALLBROOK	189 FTE
STATE-SIZE	Youngstown Grape Dist., Inc	REEDLEY	189 FTE
STATE-SIZE	Moonlight Companies Plant 4/MCSI 4	REEDLEY	189 FTE
STATE-SIZE	Sentinel Peak Resources	BAKERSFIELD	189 FTE
CITY-NEAR	Monster Energy Company 2535 Anselmo Dr	Corona	2,572 FTE
CITY-NEAR	Monster Energy Company	Corona	2,388 FTE
CITY-NEAR	Monster Energy Company - Anselmo Dr, Corona	Corona	2,335 FTE
CITY-NEAR	California Department of Transportation Facility 289	Corona	1,587 FTE
NAT-TCR	Ong Wr Shawnee Sc	Shawnee, OK	4.2 TCR
NAT-TCR	Uniontown Facility	Uniontown, PA	4.2 TCR
NAT-TCR	Terex - Watertown	Watertown, SD	4.2 TCR
NAT-TCR	Mount Carmel St. Ann's Hospital	Westerville, OH	4.2 TCR
NAT-SIZE	Seminole Electric Cooperative, Inc. Headquarters	Tampa, FL	189 FTE
NAT-SIZE	Edinburgh DVA	Edinburgh, IN	189 FTE
NAT-SIZE	Admin Services	Las Vegas, NV	189 FTE
NAT-SIZE	Pax Machine Works, Incorporated	Celina, OH	189 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, 2019, 2016. 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.