1. Testing Biota Dose Assessment Committee Methodology with 1997 Hanford Surveillance Data by E. Antonio (PNNL) and J. P. Lair (TRP) August 1999

2. Purpose: Test the DOE BDAC Methodology using Published Hanford Surveillance Data

3. Scope: Data Published in Hanford Site Environmental Surveillance Data 1997 (Bisping, 1998) Data was previously released, - should have No Surprises with compliance issues

4. Methods: Soil, Sediment and Surface Water Data Queried from Surveillance Database Hanford Site Maximum Concentrations Determined and Compared to DCGs For Sum of Fractions Which Exceeded One, Location Specific Analysis Data Further Broken Down by Geographic Location for Analysis

5. Soil Results: Sum of Fractions = 0.137

6. Sediment Results: Sum Of Fractions = 2.59E-4

7. Water Results: Sum of Fractions = 11

8. Water Results for 100-N Area: Sum of Fractions = 11

11. Spatial Considerations : Maximum Sr-90 concentration in 100-N Spring water measured at 9,900 pCi/L Maximum Sr-90 concentration in River Water, collected near the 100-N spring (1 meter from shoreline, 30 cm depth) was 13 pCi/L Assuming a straight line dilution, the DCG concentration is reached 0.09 m (3.5 inches) from the point where the spring water enters the Columbia River Because of the relatively small spatial extent of the contamination occurring at the 100-N Area, there should be no substantial risk to aquatic biota populations of the Hanford Reach of the Columbia River

12. Temporal Considerations : From field observations, river bank springs are only exposed approximately 15% of the year, for the remainder, they are either not flowing or are underwater 100-N Springs flow rate estimated at 43 L/min 1997 average daily flow rate of the Columbia River approximated at 287 million L/min No substantial community of aquatic organisms can exist in the undiluted spring water for an entire year

13. 218-W-4B Trench Data From Napier 1981

14. Presentation using Site 218-W-4B (Trenches) data: NuclideCuriespCi/g Co60140014000 Sr902802800 Cs1373103100 Th232.061.61 U23374750 U2342.626 U235.079.79 U2381.919 Pu23868680 Pu239300030000 Pu2407607600 Pu241920092000 Pu242.272.8 Am2142.122

17. Original Terrestrial Animal Parameter Worksheet

19. Modified (1 st Modification) Terrestrial Animal Worksheet

21. Modified (2 nd Modification) Terrestrial Animal Worksheet