-12- Wachholz: Ted Mitchell’s people will be in on the evaluation dose assessnmt Bair: of the next LLL draft. We should make a list of the immediate and long term issues we need to discuss this afternoon. Robison: Offers to give a summary of the present data status: Status of Present Data 1. External Doses The data base is essentially in. This consists of EG&G 50 meter grid IMP data for Enjebi and all northern islands except Pearl. 2. Ingestion Doses These doses are developed from concentration in fruit vers~s the weighted of sampled plants. ratio data: pCi/g soil profile data in the root zone A separate ratio is obtained for each sampled tree and the average of the ratios is used as the average concentration ratio. The 100 meter grid soil data have been used thus far for estimating average island soil concentrations. The more detailed 50 meter grid data can be used. average concentrations from the 100 meter grid are multiplied by the average concentration plant concentration. ratio to get the estimated average More data on veg/soil ratios will be available in the future. 3. The island Soil data appear to be lognormal. Inhalation Of the total observed mass loading (56 pg/m3), about 34 pg/m3 is due to sea-salt spray. origin. Hence, 22 pg/m3 is due to terrestrial We assume 19 hrs/day of normal activity conditions and 5 hr/day of high activity conditions. We use the ICRP model. We have a reasonable good hold on doses from inhalation. are extremely low. For estimating They doses from Pu in the lung model, we use the average Pu/Am ratio for each island and multiply this by the island average Am obtained from the IMP data on a 50 meter grid.