Group homes, intellectual and developmental disability · California

Rock Core Office

Name: Rock Core Office Workplace Safety Data
Creator: PlainSafetyScore
License: https://creativecommons.org/publicdomain/zero/1.0/

Rancho Cucamonga, CA · ~23 workers · 2 years of OSHA Injury Tracking Application data.

Compiled by PlainSafetyScore · August 25, 2026

B
Good Safety Record: 2.7
Avg TCR: 3.8
Industry avg: 0
Fatalities

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The verdict

Rock Core Office runs at 71% of its industry's injury rate - safer than the typical Group homes, intellectual and developmental disability workplace, earning a grade B.

Rock Core Office: 2.7 TCR = 71% of Group homes, intellectual and developmental disability BLS 3.8 · 2y Form 300A (see methodology below)

Rock Core Office safety composite

Rock Core Office scores strongest on total case rate (tcr) (safer than 80% of same-industry peers) and weakest on dart rate (safer than 29%), 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).

55/100

Percentile-weighted across 3 of 3 measures

Total Case Rate (TCR): B 2.69 per 100 workers

Safer than 80% of industry peers
DART rate: F 5.37 per 100 workers

Safer than 29% 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

Rock Core Office: 0.0 → 5.4 TCR

Peak year 2018 @ 5.4 TCR · DART/TCR 2× in 2018

Rock Core Office's TCR rose 5.4 from 0.0 in 2017 to 5.4 in 2018. In 2018, DART was 2× this establishment's average TCR (severity share of cases).

OSHA ITA Form 300A scorecard

Establishment book 623210 · Rancho Cucamonga, CA AT/BELOW-IND · SMALL

Grade B · TCR 2.7 · 71% of ind

DART 5.4 DART
RANK #41/151
PHOTO Charlotte Arts
BOOK 2y book
INJ 0 inj
SIZE ~23 FTE

Nearest TCR peer: Charlotte Arts (0.0 TCR gap)

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This site

2.7
Charlotte Arts

2.7
TAR RIVER TAR

2.7
Individual

2.7
United Helpers

2.7

What this shows Rock Core Office averages 2.7 TCR (71% of the Group homes, intellectual and developmental disability BLS benchmark).

Rock Core Office TCR series: 2017=0 · 2018=5.4 · BLS 3.8

Where Rock Core Office falls in its industry

2,261 Group homes, intellectual and establishments

Safer than 80% of graded establishments in this industry, whose median TCR is 5.8.

Grade B

More dangerous than peersSafer than peers

Narrower to California alone (the establishments it most directly competes with for workers and contracts): ranked #41 safest of 151 Group homes, intellectual and employers in California.

Rock Core Office (23 employees, TCR 2.7) among 29 same-industry peers, split at the industry median of 65 employees and a TCR of 5.8

Rock Core Office has fewer employees than the Group homes, intellectual and developmen median and a lower injury rate than the industry's median TCR of 5.8. 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
2018	5.4	5.4	0	1	0
2017	0.0	0.0	0	0	0

OSHA ITA peer cross-reference

Establishment peer ledger

623210 · CA · Rancho Cucamonga

2,261 Group homes, intellectual and developmental disability employers nationwide with a credible TCR · 51,834 rated employers in California with headcount on file · 229 employers in Rancho Cucamonga, 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	Charlotte Arts	CHARLOTTE, NC	2.7 TCR
NAICS-TCR	TAR RIVER TAR RIVER	GREENVILLE, NC	2.7 TCR
NAICS-TCR	Individual	KANSAS, OH	2.7 TCR
NAICS-TCR	United Helpers Care, Inc. dba Mosaic - Gateway Apts. & ACT Team	OGDENSBURG, NY	2.7 TCR
STATE-SIZE	James Diedrich Farms	FIREBAUGH	23 FTE
STATE-SIZE	Tri-Fanucchi Farms,LLC	BAKERSFIELD	23 FTE
STATE-SIZE	KAN2 - 04	FRESNO	23 FTE
STATE-SIZE	Kyer Farms	LODI	23 FTE
CITY-NEAR	California Department of Transportation Facility 304	Rancho Cucamonga	1,529 FTE
CITY-NEAR	Davis Development Company, Inc.	Rancho Cucamonga	1,214 FTE
CITY-NEAR	CUCAMONGA	Rancho Cucamonga	809 FTE
CITY-NEAR	VIP,INC. Rancho Cucamonga	Rancho Cucamonga	751 FTE
NAT-TCR	Buffalo Feeders, LLC	Buffalo, OK	2.7 TCR
NAT-TCR	RADVA Corporation	Radford, VA	2.7 TCR
NAT-TCR	Ryder Whirlpool Plainfield	Plainfield, IN	2.7 TCR
NAT-TCR	Bear Construction, Inc.	Canonsburg, PA	2.7 TCR
NAT-SIZE	Littles of Downingtown	Downingtown, PA	23 FTE
NAT-SIZE	IHS	Leesburg, FL	23 FTE
NAT-SIZE	United Scientific Inc	Little Canada, MN	23 FTE
NAT-SIZE	Allegany NY Depot	Allegany, NY	23 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: 2018, 2017. 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.