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Inspection Detail
Inspection: 120268529 - National Quarries
Inspection Information - Office: Van Nuys Mining & Tunneling District Office
Site Address:
National Quarries
28474 North Twin Oaks Valley Road
San Marcos, CA 92069
Mailing Address:
, , 00000
Union Status: NonUnion
SIC:1411
NAICS: 0
Inspection Type: Accident
Scope: Partial
Advanced Notice: N
Ownership: Private
Safety/Health: Safety
Close Conference: 12/11/1995
Emphasis: L:Tunnel
Case Closed: 08/30/1996
| Type | Activity Nr | Safety | Health |
|---|---|---|---|
| Accident | 361364144 |
| Violations/Penalties | Serious | Willful | Repeat | Other | Unclass | Total |
|---|---|---|---|---|---|---|
| Initial Violations | 1 | 1 | 2 | |||
| Current Violations | 1 | 1 | 2 | |||
| Initial Penalty | $1,500 | $0 | $0 | $75 | $0 | $1,575 |
| Current Penalty | $1,500 | $0 | $0 | $75 | $0 | $1,575 |
| FTA Penalty | $0 | $0 | $0 | $0 | $0 | $0 |
| # | Citation ID | Citaton Type | Standard Cited | Issuance Date | Abatement Due Date | Current Penalty | Initial Penalty | FTA Penalty | Contest | Latest Event | Note |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | 01001 | Other | 3203 A | 01/18/1996 | 12/11/1995 | $75 | $75 | $0 | - | ||
| 2. | 02001 | Serious | 7237 D | 01/18/1996 | 10/07/1995 | $1,500 | $1,500 | $0 | - |
Investigation Summary
Employee #1 was drilling plug holes on a mined granite block that measured 5 ft wide by 6 ft long by 3 3/4 ft high. The plug holes were 0.75 in. in diameter and 5 in. deep. Employee #1 had drilled two plug holes. The third plug hole, which was drilled perpendicularly about 3 in. from the second, was directly in line with a blast hole. The pneumatic drill apparently hit the unexploded black powder in the blast hole, causing an explosion. Employee #1's liver was lacerated, and he was killed.
Keywords: BLASTING, EXPLOSIVES, DRILL OPERATOR, DRILLING MACHINE, ROCK, WORK RULES, LIVER, EXPLOSION, LACERATION
| # | Inspection | Age | Sex | Degree of Injury | Nature of Injury | Occupation |
|---|---|---|---|---|---|---|
| 1 | 120268529 | Fatality | Cut/Laceration | Mining machine operators |