ARCHIVED REPORTS_SITE INVESTIGATION 2003 FINAL RPT

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5. Radiation Monitoring Plan Undocumented or illegal solid waste disposal sites typically contain unclassified wastes that may include low-level radioactive materials. The following radiation plan describes methods and equipment that will be used to detect radioactive materials in the field and measure radiation emissions. A contingency plan is included that describes the course of action to be followed if high-level radioactivity materials are discovered. The decision to monitor for radioactive materials shall be at the discretion of the CIWMB project engineer/manager. It is recommended that all waste sites be surveyed for radioactive material especially old municipal burn dumps. At a minimum, it is recommend that sampling team implement the following: 1. Don personal radiation monitoring devices; 2. Perform a general survey of the waste area(s) using a meter capable of detecting alpha, beta, and gamma radiation; 3. Spot survey the sampling locations; 4. Survey each sample in the field for radioactivity; and 5. Survey all equipment and personnel for radioactivity when leaving the work zone. 5.1. Personal Radiation Monitoring At the beginning of the sampling event, each person working in the waste area will don a personal radiation dosimeter. Dosimeters shall be digital, "pager -type' dosimeters, such as the model PD -10i personal dosimeter manufactured by Science Applications International Corporation (SAIC), of San Diego, California. The dosimeters must be capable of detecting gamma radiation to the nearest 1 microRoentgen per hour (µR/hr). At the start of the project, all personnel shall provide their dosimeters to the designated Site Health and Safety Officer (SHSO), who will maintain personal radiation exposure records. At the beginning of each working day, the designated Site Health and Safety Officer will "zero -out' each dosimeter, and assign one to each person working in the waste area. At the end of each day, personal dosimeters will be returned to the SHSO who will record the daily exposure for site worker. Any exposure in the milliroentgen per hour (mR/hr) range will be noted by the SHSO so that no individual receive more than 100 mR in a calendar year. 5.2. Radiation Surveying Radiation surveying will be conducted using approved and calibrated survey equipment capable of measuring gamma radiation emissions of at least 1 µR/hr. Approved radiation survey equipment includes the Digital Ratemeter manufactured by Ludlum Instruments and the MHV Surveyor 2000 manufactured by Bicron/Saint Gobain. These instruments must be calibrated at least once each year by the manufacturer or at a designated service center to ensure field accuracy.