J-156-57 -5e 12 November 195) and the CP compound. Other parts of NPG will of course be cold but we are concerned with keeping "clean" only the camp and the compound. To advise people when decontamination is needed Rad-Safe will operate contamination check points in places which inconvenience as few people es possible. At present vehicles are considered contaminated at 7 mr/hr y outside and 7 mr/hr y and B inside. This ruling is mw under considera= tion by the AEC and may be revised upwerds, Clothing is considered con- teminated et 2 mr/hr y. The measurement of these levels with moderate precision requires that check points be located in regions of quite low background. We will propose thet a vehicle leaving a contaminated area but not cestined for either the CP ccmpound or the camp may be checked or not as desired by the driver when he reaches the check=point. If he does not want his vehicig. checked at that time he may have his cer marked. Before tha vehicle will be passed by the Security guards at either the CP gate or the Fraenchzan'a Pass gate it must be checked and cleared by Rad=-Safe. When it is checked the driver will be told whether or not the vehicles must be washed. If the vehicle is conteminated the driver may elect to have it washed or lezve it outside the "clean" areas, to be washed at a more convenient time. This scheme removes the necessity for checking a vehicle each time it lezves & contaminated area We do not propose to mark people on the forehead in a similar way, but the same rule will apply. There never has been a sure way to keep cornteninated clothing out of "clean" areas. About ail we can do is to ask people to have thenselves checked either at the highway check-point or the Rac=Safe building before they go to camp or the compound. The success or failure of this system will depend on whether people will live with it. The major complaints in the past have come about because most of the traffic was not contaminated. By relaxing the rules we hope to reduce the inconvenierce to most of the people. On the other hard there will be cases where contanination is heavy and should be removed promptly if only because film badge readings are unnecessarily increasad. People who have good reason to believe their vehicles and clothing are contaminated should not abuse tha systean. Particvlarly, if hot cars show up in the camp moter pool or in the CP compound Clark will probably revert to the old system. 6. Protective clothing. uilding. Protective clothing may be obtained at the Rad-Safs Whether it is worn or not can be left up to the individual with the unlerstanding that contaninated personal clothing is just as taboo as cormbaminated Rad-Safe clothing in "clean® areas. We will try to make protective clothing easier to get than it has bean before. It has always been theoretically possible for a monitor to draw clothing for a party the night before a shot and this has often been done. We will DOPIED/DOE LANL RG