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3.0 HAZARD EVALUATION
<br /> 3.1 CHEMICAL CONTAMINANTS:
<br /> Potential site contaminants at petroleum contamination sites include gasoline, gasohol, motor oil, fuel oils (including
<br /> kerosene,diesel fuel),and aviation grade gasoline. These materials may exist as free product in soil or on groundwater,
<br /> and/or as contaminants to soil and water,and/or in tanks,piping,and systems.
<br /> Fuel products include materials in and around storage tanks, such as gasoline, kerosene, diesel, and their derivatives,
<br /> xylene,toluene,benzene,tetraethyl lead(TEL),and lead.
<br /> 3.2 PHYSICAL AND MECHANICAL HAZARDS:
<br /> Activities on site may include site visits, installation of free product recovery systems, installation of groundwater
<br /> recovery systems, installation of soil venting systems, installation of biological treatment systems, installation of air
<br /> strippers, installation of carbon absorption units,removal and installation of tanks,piping,and systems,and removal of
<br /> contaminated soil.
<br /> Hazards associated with these activities are varied and include vehicle/pedestrian collisions,fire,collapse of excavation
<br /> and trenching,handling of heavy materials and equipment operations resulting in contact and crushing type injuries,and
<br /> use of air-and electrically-powered tools which may result in abrasions,contusions,lacerations,etc.
<br /> 3.3 JOB HAZARD ANALYSIS AND RISK ASSESSMENT:
<br /> The chemical contaminants that may be present and the hazardous activities that may be performed at the site will be
<br /> identified through preliminary site assessment activities,such as site visits or records search. Based on this preliminary
<br /> information, initial risk assessments will be made by the Site Safety Officer, in consultation with a DCM Company
<br /> Health and Safety Officer, defining hazards (both chemical and physical) to workers and other on site personnel, the
<br /> surrounding populace,and the environment.
<br /> The identities of potential hazards and resultant initial risk assessments will be included in the Hazard Evaluation section
<br /> of the Site-Specific Plan,will be reviewed daily,and will be updated as necessary by the Site Safety Officer. Updated
<br /> information will be communicated to all other on site personnel immediately.
<br /> 3.4 AIR-MONITORING:
<br /> An air-monitoring program is fundamental to the safety of on site and off site personnel. Total organic vapor(TOV)
<br /> levels associated with on site activities will be monitored with a Photoionization Detection(PID)instrument(OVM or
<br /> HNU PI-101). This instrument will be the primary source of information for upgrading personal protection. Calibration
<br /> and maintenance of monitoring equipment will be in accordance with manufacturer recommendations.
<br /> The Site Safety Officer, or designee, will establish daily a background TOV prior to initiating on site activities. Under
<br /> most circumstances,taking multiple readings at representative locations along the perimeter of the site and averaging the
<br /> results of sustained measurements can determine this level. (A sustained measurement is defined as the arithmetic
<br /> average of six readings taken at 10-second intervals.) If, due to site conditions, it appears that perimeter readings will
<br /> not yield a truly representative background level, the Site Safety Officer or the DCM Company Health and Safety
<br /> Officer will be consulted for guidance.
<br /> Decisions to upgrade personal protection will be based on sustained breathing zone TOV that exceeds background
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