Site-Specific Health and Safety Plan (HASP) - Laschools.org

LAUSD Proposed South Region High School #9 & Middle School #4
6-10
December 2006
Site Specific Health & Safety Plan (HASP)
6.3.2.6 Subsurface/Excavation Hazards
Before intrusive field activities are performed, efforts must be made to determine if underground
utilities (i.e., sewers, and telephone, water, fuel, and electrical lines) will be encountered and, if
so, where such underground installations are located. The Field Team Manager will ensure that
all underground installations have been identified prior to any intrusive operations, including, but
not necessarily limited to, contacting Underground Services Alert (USA) and compliance with
Parsons Mandatory Pre-drilling Protocol. Precautions will be exercised when working near any
overhead electrical lines. A minimum safe distance will be established by the SHSO in areas of
overhead and underground power lines.
All excavation will be performed under the supervision of a competent person. Cave-ins from
unstable soil are always a concern during excavation and trenching. Barriers will be provided to
prevent persons from accidentally falling into the excavation.
An excavation or trench allowed for human entry that is deeper than 5 feet or in poor conditions
will be shored, sloped, or benched in accordance with Title 8, CCR Section 1540-41. All shoring
will be inspected daily at the beginning of the day by a competent person and after any event that
could compromise the safety of an excavation (for example, rain, heavy equipment operation
nearby, or an earthquake).
6.3.2.7 Electrical Hazards
Some of the equipment used during this investigation will be powered by electricity.
Maintenance and daily activities require personnel to use, handle, and control this equipment.
Safe work practices must be strictly observed to avoid serious injury or death. According to
CCR, Title 8, Section 1760, only qualified employees may work on or with exposed energized
lines or parts of equipment, or in areas containing unguarded, un-insulated, energized lines or
parts of equipment operating at 50 volts (V) or more. Qualified employees must be trained in
accordance with CCR, Title 8, Section 1760 and certified as such by Parsons. Ordinary 120 V
electricity may be fatal. Extensive studies have shown that currents as low as 10 to 15 milliamps
(mA) can cause loss of muscle control and that 12 V may, on good contact, cause injury.
Therefore, all voltages should be considered dangerous.
General rules for electrical safety are as follows:
• Only authorized and qualified personnel will perform electrical installations or
repairs.
• All electrical wires and circuits will be assumed to be “live,” unless it can be
positively determined they are not.
• Appropriate protective clothing will be worn by personnel performing electrical
work.
• All electrical equipment will be properly grounded and class-approved for the
location.
• Ground fault circuit interrupter receptacles and circuit breakers will be installed in
all outdoor temporary circuits and wet locations, as well as where otherwise
required by the National Electric Code (NEC) and CCR Title 8, Section 1760.
• Electrical control panels will not be opened unless necessary.
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