Page 449

(B) shallow-dose equivalent of 50 rem (0.5 Sv) to the skin of the whole body or to the skin of any extremity. (b) The assigned deep dose equivalent must be for the part of the body receiving the highest exposure. The assigned shallow dose equivalent must be the dose averaged over the contiguous 10 square centimeters of skin receiving the highest exposure. The deep dose equivalent, lens dose equivalent, and shallow dose equivalent may be assessed from surveys or other radiation measurements for the purpose of demonstrating compliance with the occupational dose limits, if the individual monitoring device was not in the region of highest potential exposure, or the results of individual monitoring are unavailable. (c) If an individual works for more than one registrant and is exposed, or likely to be exposed, to ionizing radiation from multiple sources, the total combined exposures from all registrants may not exceed the limits specified in (a) of this section. A registrant shall maintain a record for each individual worker that incorporates the annual exposure information for all registrants that the individual works for. (Eff. 4/9/2009, Register 190) Statutory Authority: Authority: AS 18.60.475 AS 18.60.485 7 AAC 18.220. Individual monitoring in controlled area. (a) A registrant shall maintain records showing the ionizing radiation doses of all individuals for whom personnel monitoring is required under 7 AAC 18.280. The registrant shall keep these records on an annual occupational radiation exposure form issued by and available from the department with the information required on that form, or on clear and legible records containing all the same information required on the form. The dose information entered on the form or records must be for increments of time not exceeding 12 consecutive months. The information must include the

(1) name and date of birth of the individual;

(2) name of the registrant;

(3) dose equivalents for periods of one month or a calendar quarter, including

(A) deep dose equivalent;

(B) lens dose equivalent;