publications > open file report > OFR 2004-1448 > appendixes > Appendix E

Appendix E. Lead-210 for 02-5-21-5.
Core Location: 02-5-21-5
Core ID	Depth (cm)	Mean Depth (cm)	Total Pb-210 Activity (dpm/g)	Total Pb-210 Activity Error (+/-)	Excess Pb-210 Activity (dpm/g)	Calc. Excess Pb-210 Activity (dpm/g)
02-05-21-5	0-1	0.5	9.88	0.266	8.32	11.93
02-05-21-5	1-2	1.5	12.71	0.201	11.15	7.60
02-05-21-5	2-3	2.5	8.90	0.146	7.34	4.84
02-05-21-5	3-4	3.5	3.23	0.128	1.67	3.08
02-05-21-5	4-5	4.5	1.73	0.098	0.17	1.96
02-05-21-5	5-6	5.5	3.12	0.093	1.56	1.25
02-05-21-5	6-7	6.5	3.44	0.198	1.88	0.80
02-05-21-5	7-8	7.5	2.51	0.100	0.95	0.51
02-05-21-5	8-9	8.5	1.22	0.054	-0.34	0.32
02-05-21-5	9-10	9.5	0.90	0.032	-0.66	0.21
02-05-21-5	10-11	10.5	1.25	0.054	-0.31	0.13
02-05-21-5	11-12	11.5	1.41	0.048	-0.15	0.08
02-05-21-5	12-13	12.5	1.43	0.059	-0.13	0.05
02-05-21-5	13-14	13.5	1.53	0.039	-0.03	0.03
02-05-21-5	14-15	14.5	1.56	0.063	0.00	0.02
02-05-21-5	15-16	15.5	1.88	0.070	0.32	--
02-05-21-5	16-17	16.5	1.71	0.054	0.15	--
02-05-21-5	17-18	17.5	2.08	0.061	0.52	--
02-05-21-5	18-19	18.5	2.33	0.065	0.77	--
02-05-21-5	19-20	19.5	1.35	0.058	-0.21	--
			1.56
Average accumulation rate 0-8 cm = 0.07 cm/yr Estimated Ra-226 activity = 1.56 dpm/g, average of Total Pb-210 activity 8-20cm. Exponential best fit of Excess Pb-210 data (0-15cm). *Calc. Excess = 14.9565 * exp(-0.4514 * z) r2 = 0.78