HE.DQUATERS JOINT TaSK 7ORCE SEVEN APO 187 (HOW), c/o Postmaster San Francisco, California J=3/72953 19 February 1954 ENORANDUM FOR: SUBJULT: See Distribution Protcetion of Pood and Water from Radfoactive Contaaination Resulting frem Fall-Gut l. It is not expected that radicactive material will bo deposited on food, cooking end cating utonsils or in the drinking water supoly in quantities sufficient to create an internal hasard in areas wiere occupancy is acceptable from an extornal hazard standpoint. However, in kecping with the concect that exposure should be prevented where possible, sm in view of good housekeeoing, certain steps should be taken to prevent or mintdze contamination of food, weter end sess eq:iipment. 2. Methods of creventing contamination will vary somewh:t depending 3. The following steps to schiewe non-comtamination will >be t-ken: upon whethor cr not there is-pre-shot evicuction of the crea. a. Evacuated arcas. (1) Water supoly. (a) Prior to cvacustion, all openings into the we.ls or storcge tenks will be cowred by a suitiblo aetcrial such as canvas to sre- vent fall-out from entering directly into the system, but not tight enouzh to nrevent cump operation. If possible, stornzge tanks for drinking purposes should be isolated fron tho aystem and coaplctely buttoned up. This letter method is oreferable as upon re-entry, weter for drinicing and cocking purposes can be obteined imadi-tely which will be frec from comtaminetion. Uncovered storage in collapsible tanks should be dreined, the tonk co._icsed and covered. (o) Upon re-entry, if fall-out hes occurred, tie buttons. up tenk will bo diverted into tho weter system cnc the lines flusmcu. «ater sarples will & enalysed b: fore use for drinking or cooking is *utnorized. Tf no fall-out has cecurred, restrictions will not bc a clied and s- sling will net be done. Inelosure 10 28