NATIONAL QUARRIES
28474 N TWIN OAKS VALLEY RD, SAN MARCOS, CA 92009
Having inspection records is common for businesses in regulated industries. Data and methodology
Inspection records
Jul 25, 2000#125937201Jul 25, 2000Planned (H) · Complete scope, Safety#125937201$1501 viol.1 violation$150 in penalties
Inspection #125937201
Dates
- Opened
- Jul 25, 2000
- Closing Conference Date
- Jul 28, 2000
- Closed
- Jun 25, 2001
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 11
Violations and Penalties
- Total Violations
- 1
- Violation Types
- 1 other-than-serious
- Initial Penalties
- $150
- Penalties on Record
- $150
- Site Address
- 28474 North Twin Oaks Valley Road, San Marcos, CA 92069
- Industry
- Not classified in OSHA's inspection record.
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Violations
Violation list (1 of 1 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 7016 Haulage Vehicle, Construction and Maintenance OSHA citation code: 7016 C | Other | 1 | 1 | $150 | $150 | Sep 20, 2000 | - | - |
Sep 23, 1998#120135603Sep 23, 1998Planned (H) · Complete scope, Safety#120135603$00 viol.0 violations$0 in penalties
Inspection #120135603
Dates
- Opened
- Sep 23, 1998
- Closing Conference Date
- Sep 23, 1998
- Closed
- Feb 11, 1999
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 7
Violations and Penalties
- Total Violations
- 0
- Initial Penalties
- $0
- Penalties on Record
- $0
- Site Address
- 28474 North Twin Oaks Valley Road, San Marcos, CA 92069
- Industry
- Not classified in OSHA's inspection record.
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Sep 12, 1997#120102330Sep 12, 1997Planned (H) · Complete scope, Safety#120102330$00 viol.0 violations$0 in penalties
Inspection #120102330
Dates
- Opened
- Sep 12, 1997
- Closing Conference Date
- Sep 12, 1997
- Closed
- Apr 27, 1998
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 10
Violations and Penalties
- Total Violations
- 0
- Initial Penalties
- $0
- Penalties on Record
- $0
- Site Address
- 28474 North Twin Oaks Valley Road, San Marcos, CA 92069
- Industry
- Not classified in OSHA's inspection record.
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Dec 17, 1996#126001619Dec 17, 1996Planned (H) · Partial scope, Safety#126001619$00 viol.0 violations$0 in penalties
Inspection #126001619
Dates
- Opened
- Dec 17, 1996
- Closing Conference Date
- Dec 17, 1996
- Closed
- Mar 13, 1997
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 10
Violations and Penalties
- Total Violations
- 0
- Initial Penalties
- $0
- Penalties on Record
- $0
- Site Address
- 28474 North Twin Oaks Valley Road, San Marcos, CA 92069
- Industry
- Not classified in OSHA's inspection record.
Planned Inspection: This inspection record is categorized as a planned inspection in the DOL OSHA enforcement data. Planned inspections are part of OSHA's scheduled enforcement activity rather than being opened directly from a complaint or reported incident at that worksite.
Mar 21, 1996#120102280Mar 21, 1996Follow-Up (F) · Partial scope, Safety#120102280$00 viol.0 violations$0 in penalties
Inspection #120102280
Dates
- Opened
- Mar 21, 1996
- Closing Conference Date
- Mar 21, 1996
- Closed
- Jun 7, 1996
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 9
Violations and Penalties
- Total Violations
- 0
- Initial Penalties
- $0
- Penalties on Record
- $0
- Site Address
- 28474 North Twin Oaks Valley Road, San Marcos, CA 92069
- Industry
- Not classified in OSHA's inspection record.
Follow-Up Inspection: This inspection record is categorized as a follow-up inspection in the DOL OSHA enforcement data. Follow-up inspections are used by OSHA after earlier enforcement activity and can be used to check later compliance status.
Oct 6, 1995#120268529Oct 6, 1995FatalityAccident (A) · Partial scope, SafetyFatality#120268529$1,5752 viol.2 violations$1,575 in penalties
Inspection #120268529
Dates
- Opened
- Oct 6, 1995
- Closing Conference Date
- Dec 11, 1995
- Closed
- Aug 30, 1996
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 9
- Related Activity
- 1 accident
Violations and Penalties
- Total Violations
- 2
- Violation Types
- 1 serious, 1 other-than-serious
- Initial Penalties
- $1,575
- Penalties on Record
- $1,575
- Site Address
- 28474 North Twin Oaks Valley Road, San Marcos, CA 92069
- Industry
- Not classified in OSHA's inspection record.
Accident Inspection: This inspection record is categorized as an accident inspection in the U.S. Department of Labor OSHA enforcement data. Employers must report work-related fatalities within 8 hours, and work-related inpatient hospitalizations, amputations, or losses of an eye within 24 hours. An accident-related inspection does not by itself determine fault.
Incident Investigation Summaries
Incident investigation summaries linked to this inspection through OSHA's accident and injury enforcement data. These summaries describe the reported incident. The enforcement outcome for the linked inspection is in the inspection details above.
Employee killed in black powder explosion
Violations
Violation list (2 of 2 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 3203 Injury and Illness Prevention Program OSHA citation code: 3203 A | Other | 1 | 9 | $75 | $75 | Dec 11, 1995 | - | - |
| 02001 | 7237 Misfires OSHA citation code: 7237 D | Serious | 1 | 3 | $1,500 | $1,500 | Oct 7, 1995 | - | - |
Jul 12, 1995#119996569Jul 12, 1995Complaint (B) · Complete scope, Safety#119996569$1,0407 viol.7 violations$1,040 in penalties
Inspection #119996569
Dates
- Opened
- Jul 12, 1995
- Closing Conference Date
- Oct 16, 1995
- Closed
- Jan 23, 1996
Inspection
- Advance Notice
- No
- Owner Type
- Private
- Union Status
- No
- Number of Employees
- 9
- Related Activity
- 1 complaint
Violations and Penalties
- Total Violations
- 7
- Violation Types
- 7 other-than-serious
- Initial Penalties
- $1,040
- Penalties on Record
- $1,040
- Site Address
- 28474 N Twin Oaks Valley Rd, San Marcos, CA 92009
- Industry
- Not classified in OSHA's inspection record.
Complaint Inspection: This inspection record is categorized as a complaint inspection in the DOL OSHA enforcement data. OSHA can open complaint-driven inspections after receiving safety or health complaints from workers or their representatives.
Violations
Violation list (7 of 7 shown)
| Citation | Standard | Type | Instances | Exposed | Initial | Current | Abatement | Contest | Final Order |
|---|---|---|---|---|---|---|---|---|---|
| 01001 | 3203 Injury and Illness Prevention Program OSHA citation code: 3203 A | Other | 1 | 9 | $85 | $85 | Nov 15, 1995 | - | - |
| 01002 | 3578 Permissible Wheel Exposure for Periphery Grinding OSHA citation code: 3578 G | Other | 2 | 9 | $175 | $175 | Nov 15, 1995 | - | - |
| 01003 | 3660 Rated Capacity OSHA citation code: 3660 A | Other | 1 | 1 | $85 | $85 | Nov 15, 1995 | - | - |
| 01004 | 3661 Brakes and Warning Devices OSHA citation code: 3661 C | Other | 1 | 1 | $85 | $85 | Nov 15, 1995 | - | - |
| 01005 | 4300 Circular Ripsaws Manual Feed (Class B) OSHA citation code: 4300 A | Other | 1 | 9 | $260 | $260 | Nov 15, 1995 | - | - |
| 01006 | 5021 Equipment over Three Tons Rated Capacity OSHA citation code: 5021 A | Other | 1 | 9 | $175 | $175 | Nov 15, 1995 | - | - |
| 01007 | 3314 The Control of Hazardous Energy for the Cleaning, Repairing, Servicing, Setting-Up, and Adjusting Operations of Prime Movers, Machinery and Equipment, Including Lockout/Tagout OSHA citation code: 3314 F | Other | 1 | 9 | $175 | $175 | Nov 15, 1995 | - | - |
Penalty amounts may differ from final amounts after settlement or judicial review. How to read these records
About these records
A company page groups inspections with the same normalized employer name, city and state; it is not a legal-entity identifier (how pages are grouped).
This page displays public OSHA enforcement data. Status text follows the DOL inspection record first and may include citation-level context when the inspection feed and citation records are out of sync. Penalty amounts shown reflect the latest penalty amounts on record in the DOL database and may differ from initial assessments or final amounts. This is not an official OSHA resource.
OSHA's public enforcement data does not publish a "guilty" or "not guilty" field for inspections. The closest outcome fields available are the citation counts, penalty amounts, contest dates, final-order dates, and the inspection close date shown on this page. How to interpret these status fields. How initial and current penalties are recorded.
OSHA may publish multiple citation rows in the same inspection with the same standard and penalty fields. Separate rows can still differ in OSHA metadata such as citation identifier, recorded instance count, exposed workers, or gravity value. Contest and Final Order columns show citation-level dates from OSHA's enforcement record. A dash means OSHA's record does not currently show that activity for the citation.
Source: U.S. Department of Labor OSHA incident investigation data (`osha_accident` + `osha_accident_injury`). Linked via `rel_insp_nr` to the inspection activity number (exact government key). Injury, body part, source and event values are OSHA's own codes. OSHA states that these fields are not coded according to the requirements under the Occupational Injury and Illness Classification System (OIICS). Only the values present in the OSHA record are listed; an incident with no value that resolves in OSHA's code table shows "Injury details not recorded". Where a record covers several people, each field lists every value recorded across them.
Understanding These Penalties
The maximum penalty for a serious violation in 2025 is $16,550 per violation. For willful violations, the range is $11,823 to $165,514. The current penalty column shows the latest amount on record in OSHA's database for each citation. When the current penalty differs from the initial penalty, OSHA's records show that the amount changed during the enforcement process, but this page does not determine the specific reason for each change. Penalty amounts are set by OSHA and adjusted annually for inflation.
17 inspections, 1995 to 2010. Each row is one inspection; point at or tap a row for its dates and totals.
Source: DOL OSHA enforcement data (inspections and violations), linked via activity_nr (exact government key).
Penalty changes: Amounts shown reflect what OSHA's enforcement record publishes. The reason for any change is not stated unless OSHA's record explicitly says so.
Short cases: When a case closed soon after it opened, the closed marker is drawn slightly to the right so both markers stay visible. Each row's card shows the exact dates.