Offsite Monitoring

DOE-EM-STD-5503-94

8.7. OFFSITE MONITORING

Locations of offsite monitoring stations should be determined in the field by the SSHO. In

general, at least three stations (one upwind and two downwind) should be used at pre-established

distances, in accordance with the predominant wind directions recorded at the site.

Monitoring at downwind locations should be conducted a minimum of once each workday

following the establishment of ambient background levels. Ambient background levels should

be established at the upwind offsite monitoring station. The mean value of three separate

readings should be recorded as the ambient background level.

8.8. PERIMETER MONITORING

Perimeter monitoring is intended to detect any migration of pollutants outside of the Exclusion

Zone. Both direct-reading and time-integrated monitoring/sampling should be considered.

8.9. METEOROLOGICAL MONITORING

Accurate information on temperature, precipitation, wind speed, and wind direction should be

provided by existing site resources or a portable meteorological station. Data obtained should be

used to aid in determining the daily monitoring strategy (e.g., determining sampling locations).

8.10. QUALITY ASSURANCE/QUALITY CONTROL

Procedures should be developed in accordance with DOE Order 5700.6C, Quality Assurance,

and EPA requirements for quality assurance/quality control of samples and sample results from

equipment calibration through the sample collection, sample shipment, and reporting of sample

results should be specified. The procedures should include:

Sample packaging and shipping,

Chain of custody,

Record keeping,

Quality review checks of sampling data and calculations,

Data corrections,

Field sample blanks, and

Sample duplicates.

8.11. RECORD KEEPING

An important aspect of any data generation is accurate record keeping. The air monitoring staff

should be responsible for the completeness and storage of all records. Forms used to record

pertinent data should contain the information specified in the following sections. When any

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