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

Appendix G. Lead-210 for 02-5-21-4.
Core Location: 02-5-21-4
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)
02-05-21-4	0-1	0.5	29.38	0.56	27.18	29.51
02-05-21-4	1-2	1.5	25.92	0.32	23.72	21.42
02-05-21-4	2-3	2.5	17.52	0.37	15.32	15.55
02-05-21-4	3-4	3.5	19.72	0.53	17.52	11.29
02-05-21-4	4-5	4.5	6.89	0.41	4.69	8.19
02-05-21-4	5-6	5.5	8.37	0.17	6.17	5.95
02-05-21-4	6-7	6.5	4.14	0.13	1.94	4.32
02-05-21-4	7-8	7.5	4.41	0.21	2.21	3.13
02-05-21-4	8-9	8.5	3.70	0.10	1.50	2.27
02-05-21-4	9-10	9.5	2.69	0.10	0.49	1.65
02-05-21-4	10-11	10.5	2.26	0.05	0.06	1.20
02-05-21-4	11-12	11.5	2.33	0.06	0.13	0.87
02-05-21-4	12-13	12.5	2.46	0.12	0.26	0.63
02-05-21-4	13-14	13.5	2.06	0.09	-0.14	0.46
02-05-21-4	14-15	14.5	2.19	0.09	-0.01	0.33
02-05-21-4	15-16	15.5	2.14	0.08	-0.06	0.24
02-05-21-4	16-17	16.5	2.29	0.12	0.09	0.18
02-05-21-4	17-18	17.5	2.05	0.13	-0.15	0.13
02-05-21-4	18-19	18.5	2.42	0.11	0.22	0.09
02-05-21-4	19-20	19.5	1.32	0.05	-0.88	0.07
			2.20
Average accumulation rate 0-9 cm = 0.1 cm/yr Estimated Ra-226 activity = 2.20 dpm/g, average of Total Pb-210 activity 9-20cm. Single decay best fit of Excess Pb-210 data (0-20cm). Calc. Excess = 5.8389 * exp((5.5569 - z) / 3.1212) r2 = 0.97