Inspection Detail

Inspection: 303675425 - Concrete Works Of Colorado, Inc.

Inspection Information - Office: Denver Area Office

Inspection Nr: 303675425

Report ID: 0830500

Date Opened: 02/01/2001

Site Address:
Concrete Works Of Colorado, Inc.
2537 Pearl St.
Boulder, CO 80301

Mailing Address:
3550 East 160th Avenue, Brighton, CO 80601

Union Status: NonUnion

SIC:1611

NAICS: 0

Inspection Type: Accident

Scope: Partial

Advanced Notice: N

Ownership: Private

Safety/Health: Safety

Close Conference: 05/24/2001

Emphasis: N:Trench, S:Construction

Case Closed: 08/02/2001

Related Activity
Type	Activity Nr	Safety	Health
Accident	101571693
Referral	201575040	Yes	Yes

Violation Summary
Violations/Penalties	Serious	Willful	Repeat	Other	Unclass	Total
Initial Violations	3					3
Current Violations	2					2
Initial Penalty	$10,500	$0	$0	$0	$0	$10,500
Current Penalty	$4,900	$0	$0	$0	$0	$4,900
FTA Penalty	$0	$0	$0	$0	$0	$0

Violation Items
#	Citation ID	Citaton Type	Standard Cited	Issuance Date	Abatement Due Date	Current Penalty	Initial Penalty	FTA Penalty	Latest Event	Note
1.	01001	Serious	19260021 B02	05/25/2001	07/15/2001	$1,750	$3,500	$0	I - Informal Settlement
2.	01002	Serious	19260651 B03	05/25/2001	06/12/2001	$3,500	$3,500	$0	I - Informal Settlement	Citation has been deleted.
3.	01003	Serious	19260651 K01	05/25/2001	06/12/2001	$3,500	$3,500	$0	I - Informal Settlement	Citation has been deleted.
4.	01004A	Serious	19260651 B03	05/25/2001	06/12/2001	$3,150	$0	$0	Q - National Office Adjustment
5.	01004B	Serious	19260651 K01	05/25/2001	06/12/2001	$0	$0	$0	Q - National Office Adjustment

Investigation Summary

Investigation Nr: 201570728

Event: 01/31/2001

Three Employees Injured In Natural Gas Explosion

The contractor was excavating from the road way toward the right of way line to install new sidewalks and curb and gutter. This activity was one element of a street widening project. Employee #1, on the Grad-all XL 2300, was making a cut into the driveway of a home with a 5-ft flat bottom bucket and caught the gas line. Unknown to the construction workers, the pipe had separated at two locations, at the curb line and under the garage apron of the home. The gas seeped into the garage where the heater and furnace were located. After the concentration of natural gas exceeded the Lower Explosive Limit (LEL), the gas reached an ignition source, the pilot light either on the furnace or the water heater. This caused the natural gas explosion at approximately 11:52 a.m. on January 31, 2001. The explosion resulted in three hospitalizations and a total loss of the home.

Keywords: BURN, PILOT LIGHT, HEAT, NATURAL GAS, EXPLOSION, GAS LEAK

Investigated Inspection
#	Inspection	Degree of Injury	Nature of Injury	Occupation
1	303675425	Hospitalized injury	Burn/Scald(Heat)	Industrial truck and tractor equipment operators
2	303675425	Hospitalized injury	Burn/Scald(Heat)	Construction laborers
3	303675425	Hospitalized injury	Burn/Scald(Heat)	Supervisors, material moving equipment operators

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