DIAMOND MAINTENANCE SERVICES LLC is a septic tank and related services employer in SAN MARCOS, CA. Federal records show 2 OSHA inspections with 6 violations and $12,040 in penalties. All data sourced from public federal enforcement records.
Data sourced from OSHA, DOL WHD, MSHA, EPA ECHO, NLRB, FMCSA, OFLC, BLS, SAM.gov, CMS, USAspending, CPSC, NHTSA, and the UVA Corporate Prosecution Registry. Last updated: May 2, 2026.
DIAMOND MAINTENANCE SERVICES LLC
807 E MISSION RD, SAN MARCOS, CA, 92069
Parent: Noble Corp plc (107 locations)
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Inspection Breakdown
Peer Comparison
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Inspection History
No inspection records found.
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Data aggregated from public federal enforcement and program records (OSHA, WHD, MSHA, EPA, NLRB, FMCSA, OFLC, BLS, SAM.gov, CMS, USAspending, CPSC, NHTSA) plus the UVA Corporate Prosecution Registry. Employer profiles matched by name and location — matching errors may occur. Risk scores computed by FastDOL, not official government assessments. OSHA citations typically appear 3-8 months after the inspection, so very recent enforcement actions may not yet be reflected. Data provided as-is. Report a data error.
Part of a larger organization
DIAMOND MAINTENANCE SERVICES LLC is one of 107 establishments in our dataset that roll up under the parent organization Noble Corp plc. Noble Corp plc is a SEC public reporter (NE-WTA), with most recent reported revenue of $3.3B.
Federal enforcement records on DIAMOND MAINTENANCE SERVICES LLC represent activity at this specific establishment. The full enforcement footprint of Noble Corp plc across all 107 of its tracked locations is viewable on the parent profile.
Other establishments operated by Noble Corp plc
- DIAMOND MATERIALS, LLC — WILMINGTON, DE — 2 federal records
- DIAMOND MATERIALS LLC — WILMINGTON, DE — 2 federal records
- DIAMOND MATERIALS, LLC — NEWARK, DE — 2 federal records
- DIAMOND MATTRESS INC — RANCHO DOMINGUEZ, CA — 2 federal records
- DIAMOND MANUFACTURING OF BLUFFTON, LTD — BLUFFTON, OH — 2 federal records
- DIAMOND MATERIALS, LLC — KENNETT SQUARE, PA — 1 federal record
- NOBLE DRILLING SERVICES, INC. — BROWNSVILLE, TX — 1 federal record
- Diamond Mold — Salt Lake City, UT — 1 federal record
- DIAMOND MANUFACTURING COMPANY — WYOMING, PA — 1 federal record
- 110110 - DIAMOND METAL PRODUCTS INC — ANDOVER, MN — 1 federal record
Other employers in Septic Tank and Related Services within CA
- UNITED SITE SERVICES OF CALIFORNIA, INC. — SALINAS — 2 federal records
- UNITED SITE SERVICES OF CALIFORNIA, INC. — SAN DIEGO — 2 federal records
- UNITED SITE SERVICES, INC. — OAKLAND — 2 federal records
- DIAMOND ENVIRONMENTAL SERVICES — SAN DIEGO — 2 federal records
- TIMOTHY BASS INC. — MERCED — 1 federal record
- SIERRA SANITATION, INC — VISALIA — 1 federal record
- VJL WASTE MANAGEMENT SERVICES INC — HESPERIA — 1 federal record
- LA COUNTY INTERNAL SERVICES DEPARTMENT — LA VERNE — 1 federal record
- SUNSHINE SANITATION MOBILE SERVICE, INC. — LATON — 1 federal record
- ZWEIGLE SEPTIC SERVICE — REEDLEY — 1 federal record
Industry context
Within the septic tank and related services industry in CA, DIAMOND MAINTENANCE SERVICES LLC ranks in the 93th percentile of OSHA violation frequency across 1,127 comparable establishments. That places this employer among the highest-violation establishments in its peer set.
OSHA penalty totals rank in the 95th percentile of the same peer group. Inspection frequency ranks in the 87th percentile.
The Bureau of Labor Statistics reports an industry-average Total Recordable Incident Rate (TRIR) of 1.8 for the septic tank and related services sector, with a Days Away, Restricted, or Transferred (DART) rate of 1.5.
Activity timeline
No federal enforcement activity has been recorded against this establishment in the past 11 years.
Frequently Asked Questions
- What is DIAMOND MAINTENANCE SERVICES LLC's OSHA violation history?
- DIAMOND MAINTENANCE SERVICES LLC has 2 OSHA inspections on record with 6 violations and $12,040 in total penalties.
- How does DIAMOND MAINTENANCE SERVICES LLC's safety record compare to its industry?
- DIAMOND MAINTENANCE SERVICES LLC operates in the septic tank and related services industry. The industry average Total Recordable Incident Rate (TRIR) is 1.8.
About this data
This profile aggregates federal enforcement records on DIAMOND MAINTENANCE SERVICES LLC of SAN MARCOS, CA from 17 federal data sources. Records were found in 3 sources: OSHA workplace safety inspections, SEC XBRL companyfacts (parent financials), and BLS industry safety benchmarks. The remaining 14 sources were checked and found no matching records: WHD, MSHA, EPA, NLRB, OFLC, OFCCP, FMCSA, USAspending, SAM.gov, CMS, CPSC, NHTSA, UVA, SEC enforcement.
Establishments are matched across agencies using normalized employer name, state, and ZIP code. The dataset was last refreshed on May 2, 2026. DIAMOND MAINTENANCE SERVICES LLC resolves to the parent rollup Noble Corp plc, which operates 107 establishments in our dataset. OSHA accident records on file for DIAMOND MAINTENANCE SERVICES LLC include 1 hospitalization.
This profile may be incomplete if DIAMOND MAINTENANCE SERVICES LLCoperates under multiple legal names, files under variations our entity-matching rules don't yet cover, or maintains records below current matching thresholds. To report a missing record or correction, email corrections@fastdol.com.