Site Characterization Instructional Goal: Upon completion of this topic the participant will better understand the need to identify and evaluate various types of hazards using the processes of site characterization and to see the importance of information documentation.
Site Characterization Project Team Leader is responsible for site characterization and assessment. Information provided is needed to identify site hazards and select worker protection methods. Site Characterization is a continuous process.
SITE CHARACTERIZATION PHASES Off-Site Survey On-Site Survey On-Going Monitoring
Off-Site Characterization interviews/records research perimeter reconnaissance
Interview/Records Research location of site description of activity at the site previous surveys meteorological data geologic and hydrologic data
Interview/Records Research terrain pathways of dispersion habitation and population centers; populations at risk accessibility by air and roads present status of response and who has responded
Perimeter Reconnaissance Involves?
Visual Observations review historical and current aerial photos note any labels or markings note any deterioration of containers note biological indicators note unusual conditions
Develop a Site Map
monitor ambient air at site perimeter note unusual odors collect and analyze samples Monitor Ambient Air
Soil and/or Water Samples Collect and analyze off-site samples Soil Drinking Water Ground water Surface water
Site Safety Plan The Off-Site Survey is used to develop a Site Safety Plan. The Site Safety Plan outlines what must be accomplished and prescribes procedures to ensure the health and safety of the entry team.
On-site Survey Verifies and supplements the information provided by the Off-Site Survey
On-site Survey The Entry Team must monitor air for IDLH conditions monitor for ionizing radiation visually check for dangerous conditions
The On-Site Survey if NO IDLH conditions or other dangerous conditions are found. continues
On-Site Survey Conduct further air monitoring as necessary! note any safety hazards or indicators of potential exposure note all types of containers (any labels or markings) and their condition note physical properties of materials
On-Site Survey note land features identify natural wind barriers determine potential pathways of dispersion locate buried waste or contaminant plumes by using remote sensing if possible
On-Site Survey Collect and analyze samples from the site Air Ground Water Soil (surface and subsurface) Standing pools of liquids, streams and ponds Storage containers
On-going Monitoring site activities and weather conditions change can be conducted by using a combination of methods stationary sampling equipment personnel monitoring devices periodic area monitoring
Reassessment Indicators a new work phase change of season of weather in job tasks during a work phase in levels of contamination
Good Documentation will... ensure accurate communication ensure quality of data collected provide reasons for safety decisions support possible legal actions
What types of documents need to be controlled? Logbook
Controlled Documents logbooks field data records graphs photos sample labels chain-of- custody forms analytical records samples to identify biologic, pathologic and radiological hazards
What processes can be implemented to control data? Logbook
Document Control Numbering each document Keeping a document inventory Collecting all documents at the end of each work period Make sure that all information written in waterproof ink Placing all documents in a secured central file after completed