CHAPTER III, SECTION 5 badges were collected on 23 May 1958, and new badges were issued. Each time a badge wearer entered a “Full Radex” area his badge was exchanged for a new one upon his return from the area, Each evening all the badges which had been turned in during the day were processed, and a roster of the dosages was compiled by the IBM Group of the Dosimetry and Records Section. Bi-weekly total dosage roster and quarterly dosage rosters were also compiled. The environmental testing and sample counting program was a joint function of the HE&N Rad-safety Department and TU-6. A RadChem trailer at Elmer and one at Nan provided the facilities for sample preparation and counting. The majority of samples processed were counted fer gross beta activity anda small number were counted for alpha. The following is a summary of the samples which were processed and counted during HARD- TACK through 20 July 1958: Water Samples 0.00.336 Rain Water 2000... 22 Alpha Swipes.....00...00.000000.0ccecceeeee 91 Fall-outs Trays ..00..0....0.00000cceeee ce 21 Air Samples ...00000.0.20000222-20.eceeecceeeee- 9 POO o.oo cece cence eceee ec eeneeeeeeeeee 14 Urine (Tritium) —......0.0000000 2. 20 Soil ooo. cece cence ce eceee eects etee eres 14 Marine Specimens...............0...c00.-0--- 6 Plant Specimens..........0.0.0000000000000.- 3 The decontamination activities of the Rad- safety Department were divided into two Sections: the Personnel Decon Section, and the Vehicle and Equipment Decon Section. All personnel returning from “Radex’’ areas were monitored at the check points and, if contaminated, they were processed through the Personnel Decon Center. After showering, they were monitored again, and, if found uncontaminated, proceeded to the “clean” side of the Decon Center, where they had left their clothes prior to departing for the “Radex’’ area. The Vehicle and Equipment Decon Section was responsible for the decontamination of all contaminated vehicles and equipment to safe tolerance levels. In a few cases where steam and chemical cleaning failed, sandblasting was used. Following is a summary of the major equipment which was processed through the decon lot as of 20 July 1958: Trucks................ 21 ~—Helicopters ........ 10 JCOPS eee. 11 Tractors (Cat).. 10 DUKW’s............ 34 Barge .....0.. 1 LCM’s................. ~=Airpiane............ 1 2 In addition, a great many miscellaneous articles and materials were decontaminated and returned to service. Materials which could not be decontaminated were placed in barrels, filled with concrete, and disposed of at sca. The Instrument Repair Section of Rad- safety was a joint function of the H&N Radsafety Department and TU-6. There was one HE&N Rad-safety Electronics Technician assigned at Elmer, and one assigned at Nan. Their function was to repair, maintain, and calibrate all Rad-safety instruments and equipment. Due to the corrosive climatic conditions at EPG, a con- stant vigilance over these instruments had to be maintained. The instruments which were most troublesome and required the most repair and maintenance were the CD-V 700 beta-gamma survey meters. Page 371