|
Excessive organic vapors,for the purposes of initiating the use of a CGI,are defined as sustained readings(i.e.,continuous for at least 5 minutes)
<br /> at or above 250 units or as an instantaneous reading at or above 1,000 units on the PID or flame ionization detector(FID),in close proximity
<br /> (within 1 foot or less)of the borehole,test pit,sampling location,or other area of potential exposure.
<br /> In situations where hexane and/or methanol are needed for field activities,the following precautions must be observed: Keep flammable and
<br /> combustible materials away from heat, sparks and open flames; do not smoke around flammable or combustible materials; and keep all
<br /> flammable and combustible liquids in approved and properly labeled safety containers.
<br /> ❑ Landfill/Methane Hazards. Fire and explosion should be regarded as one of, if not the, most significant potential hazards associated with
<br /> drilling operations and other intrusive work conducted at a landfill. Accordingly, all sources of ignition must be fully controlled. Failure to
<br /> control ignition sources could result in fire, explosion, and pose a serious threat to life and health. Control methods may include forced
<br /> ventilation and/or filling the borehole with enough water to inhibit the release of methane and other gases that would otherwise escape through
<br /> the top of the borehole.
<br /> If forced(mechanical)ventilation is to be used,all such equipment must be approved for Class I,Division I hazardous atmospheres. The blower
<br /> must be positioned to blow across the top of the borehole so that gases and vapors may be diluted as they exit the borehole. Do not attempt
<br /> to suck out the gases or vapors. Blowers, all other mechanical equipment, and tools that could release sparks or static electricity must be
<br /> bonded and grounded.
<br /> Regardless of the gas/vapor control method used,the atmosphere surrounding the borehole must be frequently monitored using direct reading
<br /> instruments approved for Class I, Division I hazardous atmospheres. Monitoring should be conducted within 1 to 2 feet of the top of the
<br /> borehole. Do not insert sampling devices into the borehole. Never approach the auger or drill shaft while it is in operation.
<br /> Regardless of actual instrument readings,if all sources of ignition cannot be controlled,operations should be immediately shut down and the
<br /> area evacuated if readings equal or exceed 10%of LEL until ignition sources have been eliminated. Ignition sources include,but are not limited
<br /> to, smoking,static electricity, lighting, open flames,spontaneously ignitable substances,frictional heat or sparks, hot surfaces, radiant heat,
<br /> electrical sparks,stray currents,cutting and welding,ovens,furnaces,and heating equipment.
<br /> ❑ Heat and Cold Stress. Overexposure to temperature extremes can represent significant risks to personnel if simple precautions are not
<br /> observed. Typical control measures designed to prevent heat stress include dressing properly, drinking plenty of the right fluids, and
<br /> establishing an appropriate work/break regimen. Typical control measures designed to prevent cold stress also include dressing properly,and
<br /> establishing an appropriate work/break regimen.
<br /> ❑ Moving Vehicles,Traffic Safety. All vehicular traffic routes that could impact worker safety must be identified and communicated. Whenever
<br /> necessary, barriers or other methods must be established to prevent injury from moving vehicles. This is particularly important when field
<br /> activities are conducted in parking lots,driveways,ramps or roadways. OSHA 1926.201 specifies that when signs,signals or barricades do not
<br /> provide adequate protection from highway or street traffic,flagmen must be utilized. Flagmen must wear red or orange garments. Garments
<br /> worn at night must be reflective.
<br /> ® Noise. Noise exposure can be affected by many factors including the number and types of noise sources(continuous vs.intermittent or impact)
<br /> and the proximity to noise intensifying structures(e.g.,walls or buildings)that cause noise to bounce back or echo. The single most important
<br /> factor effecting total noise exposure is distance from the source. The closer one is to the source,the louder the noise. The operation of a drill
<br /> rig, backhoe, or other mechanical equipment can be sources of significant noise exposure. In order to reduce the exposure to this noise,
<br /> personnel working in areas of excessive noise must use hearing protectors(e.g.,ear plugs,ear muffs).
<br /> Rule-of-Thumb: Wherever actual data from sound level meters or noise dosimeters is unavailable and it is necessary to raise one's voice above
<br /> a normal conversational level to communicate with others within 3 to 5 feet away,hearing protection should be worn.
<br /> ® Overhead Utilities and Hazards. Overhead hazards can include low hanging structures that can cause injury due to bumping into them. Other
<br /> overhead hazards include falling objects,suspended loads,swinging loads,and rotating equipment. Hardhats must be worn by personnel in
<br /> areas were these types of physical hazards may be encountered. Barriers or other methods must also be used to exclude personnel from these
<br /> areas where appropriate. Electrical wires are another significant overhead hazard. According to OSHA (29 CFR 1926.550), the minimum
<br /> clearance that must be maintained from overhead electrical wires is 10 feet from an electrical source rated < 50 kV. Sources rated > 50 kV
<br /> require a minimum clearance of 10 feet plus 0.4 inch per kV above 50 W.
<br /> ® Pedestrian Traffic. The uncontrolled presence of pedestrians on a drilling or excavation site can be hazardous to both pedestrians and site
<br /> workers. Prior to the initiation of site activities,the site should be surveyed to determine if,when,and where pedestrian may gain access. This
<br /> includes walkways,parking lots,gates, and doorways. Barriers or caution tape should be used to exclude all pedestrian traffic. Exclusion of
<br /> pedestrian traffic is intended to prevent injury to the pedestrians and eliminate distractions that could cause injury to Partner personnel or other
<br /> site workers.
<br /> ❑ Test Pit and/or other Excavations. All provisions of the OSHA trenching and excavation standard(29 CFR 1926.650-652)must be followed
<br /> during excavation activities. This includes all test pit excavation and sampling activities. The estimated location of utility installations such as
<br /> Partner Site-Specific Health and Safety Plan Page 9
<br /> Version 2.0 July 6,2021
<br />
|