Data / Mines / California / Imerys Lompoc Plant
Imerys Lompoc Plant: 249 MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
Imerys Lompoc Plant is an active diatomaceous earth (diatomite) surface mine in Santa Barbara County, California, operated by Imerys Filtration Minerals, Inc. with 198 employees on MSHA's record (mine ID 0402848). Since January 1, 2022 MSHA inspectors issued 249 citations and orders there with $449,428 in proposed penalties, and 11 accident reports were filed there, with 11 injury or illness cases.
The request: Watch Imerys Lompoc Plant (MSHA mine ID 0402848) in Santa Barbara County, California: each new citation and each accident report. $10 of work on sign-up, no card.
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- MSHA mine ID
- 0402848
- Status
- Active since July 2, 1976
- Main commodity
- Diatomaceous earth (diatomite)
- Mine type
- Surface
- County
- Santa Barbara County, California
- Nearest town
- Lompoc
- Operator
- Imerys Filtration Minerals, Inc.
- Employees
- 198
- MSHA field office
- San Bernardino CA Field Office
- Citations and orders since January 1, 2022
- 249
- Significant and substantial
- 71 (28.5%)
- Closure orders
- 4
- High negligence or reckless
- 36
- Proposed penalties
- $449,428
- Amount paid so far
- $448,542
- Inspections
- 16
- Inspector hours on site
- 666
- Citations per inspection
- 15.56 (all mines 2.30)
- Accident reports
- 11
- Injury and illness cases
- 11
- Fatalities
- 0
- Latest MSHA record
- September 24, 2026
- Citations issued to contractors here
- 15 ($2,155 proposed)
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2022 | 36 | 15 | $31,043 | 4 |
| 2023 | 57 | 17 | $127,118 | 1 |
| 2024 | 63 | 18 | $191,481 | 3 |
| 2025 | 38 | 7 | $22,287 | 0 |
| 2026 | 55 | 14 | $77,499 | 3 |
Standards cited most at Imerys Lompoc Plant
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 56.16001 | Surface metal and nonmetal mines | 26 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 22 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 21 |
| 30 CFR 56.14112 | Surface metal and nonmetal mines | 20 |
| 30 CFR 56.14107 | Surface metal and nonmetal mines | 18 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.18002 | Surface metal and nonmetal mines | 12 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 11 |
| 30 CFR 56.14100 | Surface metal and nonmetal mines | 8 |
| 30 CFR 56.12008 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.12018 | Surface metal and nonmetal mines | 7 |
| 30 CFR 56.11002 | Surface metal and nonmetal mines | 6 |
| 30 CFR 56.12002 | Surface metal and nonmetal mines | 6 |
| 30 CFR 47.41 | Hazard communication | 5 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 4 |
Injury and illness cases at Imerys Lompoc Plant
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 11 |
What the accident reports at Imerys Lompoc Plant describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 4 |
| Slip or fall of person | 2 |
| Machinery | 1 |
| Powered haulage | 1 |
| Handtools (nonpowered) | 1 |
| Other | 1 |
| Electrical | 1 |
Equipment named in accident reports at Imerys Lompoc Plant
| Equipment | Reports |
|---|---|
| Trucks | 2 |
| Packaging machine | 1 |
| Hand tools (not powered) | 1 |
| Bulldozer | 1 |
Other open mines in Santa Barbara County, California
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Garey Rock Plant | CalPortland Company | Santa Barbara County, CA | Construction sand and gravel | 10 | 23 |
| Sisquoc Aggregates | Martin Marietta Northern California Aggregates,LLC | Santa Barbara County, CA | Construction sand and gravel | 12 | 15 |
| Bee Rock Quarry | Granite Construction Company | Santa Barbara County, CA | Crushed, broken limestone | 7 | 15 |
| Troesh Recycling, Inc. DBA RoXsand | RoXsand | Santa Barbara County, CA | Construction sand and gravel | 3 | 14 |
| Solvang Plant | Buellflat Rock Co Inc | Santa Barbara County, CA | Construction sand and gravel | 6 | 12 |
| Gordon Sand Co | Gordon Sand Co | Santa Barbara County, CA | Construction sand and gravel | 1 | 11 |
| Ellwood Pit | Santa Barbara Sand & Top Soil | Santa Barbara County, CA | Sand, industrial | 5 | 3 |
| Parks Quarry | Granite Construction Company | Santa Barbara County, CA | Construction sand and gravel | 2 | 1 |
| Acin Ranch | Sepulveda Building Materials Lompoc Inc | Santa Barbara County, CA | Dimension stone | 2 | 0 |
US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.