.- . ...,.. . : ,! .’ . : .. :, :. . -------- .,- / .. . 4 Mr. Joe Deal Division of Operational and ~ Environmental Safety DOE Washington, DC 20545 Dear Joe, . In order tc propose Eny meaningful sampling program that cculd be conducted in conjunction with the proposed multi-Atoll aerial survey, we feel we first require much nure iriformtion about the ship that is proposed for use; proposed access met!~odsto the islands; availability of small boats; type of qear we c~n take and plan to nove about cn ths islands for either marine or-terrestrial sampling which, in turn, greatly depends on the types of support the ship is willing to provide the scientific parties; the current estimates cf tim to be spent at each Atoll which will determine the amount of work we can acccriplishand the availability of funds which will be required to proceed with any proposed analytical phase of the program. -j Marine Pr0cJr2id If a vessel can enter the lagoons a marine collection program should be considered,.toestimate dose from the marine foodchain. Either a sufficient quantitycf the represent-ativeedible sp&cies be collected for analysis or fewer fish and representative water sanples collected to both cofiputeand co~pare concentration factors. These values can then be used to predict average conceiitraticns in the mrine speeies at the remaining Atolls. All sa:nplesshoula only be analyzed for 137Cs, ‘OSr and plutcnium rzdicnucljdes by wt chemical methods. These are the prli:cipaldose contributing radicnuclides in the r~arice pathi{ay%t Enewetak and Sikini and it would be a wasted e:for: tc consider looking for other redionuclides by either gamma spectron%try . or by wet ckmica-l rwttiodsat the other 13 Atolls. As a miriicm, at least 2 represent;itivereef species, co~fionlyconsmed, be collected from 5 Atoll Ioca::icnsat each Atoll. five to 10 larger pelsgic species . be dissected into should be taken.from each lagoon. The fish ‘(~ill muscle, bone, skin, gut concents, gills and internal organs. I%e tisSU2S from the reef fish at each l~~at.ioi: will be pooled for analysis while the tissues of th!zpelagic spscies, providing t!mt large enough sar:plcs are available, wiil be analyzed se;~rztely. This procedure will yi~ld from 1170 to 1550 separate sa:n?les,w.ch to be en~lyzed f~r ~37CS, “Sr cost c)=tblisprcgrm should run about end plIJtoniun, The ,arl?lyt~c~l 0.7 x 10’ Cs-i-lJrs. r