. Author manuscript; available in PMC: 2014 Nov 1.

Published in final edited form as: Appl Geochem. 2013 Nov;38:10.1016/j.apgeochem.2013.08.002. doi: 10.1016/j.apgeochem.2013.08.002

Table 2.

NO₃ and NH₄ concentrations (in mg/L as N) and corresponding δ¹⁵N and δ¹⁸O values (“−“ means not analyzed).

Wells	NO₃ Conc.	NH₄ Conc.	f=NH4/(NH4+NO3)	δ¹⁵N-NO₃ (‰)	δ¹⁸O-NO₃ (‰)	δ¹⁵N-NH₄ (‰)
606	160	120	0.43	−0.65	−1.81	9.76
648	40	9	0.19	1.50	1.26	-
656	110	41	0.27	2.53	6.96	16.01
662	26	0	0.00	4.64	2.9	-
669	8.2	2	0.20	5.02	−0.58	-
761	31	0	0.01	3.64	2.5	-
762	130	0	0.00	5.57	−0.39	-
764	55	0	0.01	4.10	3.03	-
765	150	108	0.42	0.59	2.69	13.38
771	190	276	0.59	−0.64	6.58	-
728	132	106	0.44	1.07	0.21	-
729	126	127	0.50	1.07	−0.22	12.11
730	128	135	0.51	1.12	0.74	11.30
731	128	127	0.50	0.80	0.26	13.50