HomeMy Public PortalAbout06%20-%20AR-M550U_20111005_144111 STATE_OF CALIFORNIA EDMUND G.BROWN,JR.,Governor
DEPARTMENT OF INDUSTRIAL RELATIONS
DIVISION OF OCCUPATIONAL SAFETY AND HEALTH
MINING AND TUNNELING UNIT
2211 Park Towne Circle,Suite 2
Sacramento, California 95825 Telephone (916)574-2540
FAX (916)574-2542
October 5, 2011
Town of Truckee
10183 Truckee Airport Road
Truckee, CA 96161
Attention: Becky Bucar (via e-mail: bbucar a@townoftruckee.com)
Subject: Underground Classification#: C039-057-12T
Route 89 Pedestrian & Bicycle Undererossing
Ms. Bucar:
The information provided to this office relative to the above project has been reviewed. On the basis of
this analysis, Underground Classification of"Potentially Gassy with Special Conditions"has been assigned
to the tunnel(s) identified on your submittal. Please retain the original Classification for your records and
deliver a true and correct copy of the Classification to the tunnel contractor(s) for posting at the job site.
When the contractor who will be performing the work is selected, please advise them to notify this office
to schedule the mandated Prejob Conference with the Division prior to commencing any activity
associated with boring of the tunnel(s).
Should you have another bore under construction that is not required to have an Underground
Classification (i.e.: less than 30 inches in diameter), please contact the Mining and Tunneling Unit prior to
any employee entry of such a space.
If you have any questions on this subject, please contact this office at your earliest convenience.
Sincerely,
en R. Leahy
Senior Engineer
cc: D. Patterson
File
OP ry State of California
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Y a° DIVISION OF OCCUPATIONAL SAFETY AND HEALTH
MINING AND TUNNELING UNIT
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Underground Classification
C039-057-12T
TOWN OF TRUCKEE
NAME OF TUNNEL OR MINE AND COMPANY NAME
of 10183 Truckee Airport Road, Truckee, CA 96161
MAILING ADDRESS
at ROUTE 89 PEDESTRIAN & BICYCLE UNDERCROSSING
LOCATION
has been classified as ***POTENTIALLY GASSY with Special Conditions***
CLASSIFICATION
as required by the California Labor Code §7955.
The Division shall be notified if sufficient quantities of flammable gas or vapors have been encountered underground.
Classifications are based on the California Labor Code Part 9,Tunnel Safety Orders and Mine Safety Orders.
***SPECIAL CONDITIONS***
1. A Certified Gas Tester shall perform pre-entry and continuous monitoring of the underground environment
to measure Oxygen and detect explosive,flammable, and toxic gasses whenever an employee is working in
the underground environment.
2. Mechanical ventilation shall provide for continuous exhaust of fumes and air at any time an employee is
working in the underground environment. The primary ventilation fans must be located outside of the
underground environment and shall be reversible by a single switch near the fan location.
3. The Division shall be notified immediately if any Flammable Gas or Petroleum Vapor exceeds 5%of the
Lower Explosive Limit.
4. All utilities that may be in conflict with the project shall be identified and physically located (potholed) prior
to the start of project operations.
The 12.5-foot high by 12-foot wide by 120 feet long jacked tunnel located on the northeast side or Route 89 and under
the UPRR tracks, approximately 2,000 feet southeast of the intersection of Route 89 and Interstate 80,Truckee,
Nevada County.
This classification shall be conspicuously posted at the place of employment.
Date October 5, 2011
ohn R. Leahy, Senior Engineer