220 > RADIOLOGICAL CLEANUP OF ENEWETAK ATOLL Operations Office (DOE-NV). The radiation measurements were net measurements, with the local soil used as the backgroundreference. All measurements were averaged over | square meter, provided no individual reading exceeded three times the limit value.fhe numbers in the standarg are given in terms of the absolute unit of disintegrations per Minute (dpm). For operational purposes these were converted to counts Der minute (cpm) underthe area of the probe used for the measurement. Each category was assigned a color/disposal code to be used in markingthe material with spray paint andto facilitate documentation and disposal, as follows: Color (Disposal) Code Category Red (C - Crater) Gamma radiation measurements, taken Yellow (L - Lagoon) Gammaradiation, measured within | foot of the surface, which was greater than 15 wR/hr within | foot of the object, which were greater than or equal to 100 #R/hr. but less than 100 wR/hr; or beta radiation which exceeded 5,000 dpm/100 cm2 at contact or 540 cpm under the HP-210 probe. or alpha radiation which exceeded 1,000 dpm/100 cm2 or 300 cpm underthe AC-3-7 probe at contact. Of no radiological interest, that is, it was below ail the limits for disposal as radioactive debris. Red debris was disposed of by encapsulation in Cactus Crater. Yellow debris was disposed of at designated lagoon disposal sites. Green debris Green (R - Release) was disposed of by one of several methods authorized for noncontaminated material since it met the requirements for release and reutilization without control. Within the Yellow (lagoon disposal) group, consideration was given to leaving certain debris in place if the only contaminant wasbeta radiation in excess of the Green debris limits. The Radiation Control Committee evaluated the measurements and made case-by-case recommendations based on the degree of hazard andeffort required to removethe item.4 DEBRIS SURVEYS The Enewetak Engineering Survey and Master Index generally identified all the major items on each island. However, to identify the exact location and current radiological condition of each item to be