[dd, decimal degrees; ft, feet above the North American Vertical Datum of 1988; OB, bulk deposition from E or VWM; E, depth-integrated depth-integrated environmental;																									
VWM, volume-weighted mean of two snowpack layers; ANC, acid neutralization capacity; ueq/L, microequivalents per liter;																									
uS/cm, microsiemens per centimeter; SC, specific conductance at 25degC; pH values in standard units; H, hydrogen; Ca, calcium;																									
Mg, magnesium; Na, sodium; K, potassium;  NH4, ammonium; Cl, chloride; SO4, sulfate; NO3, nitrate; DOC, dissolved organic carbon;																									
mg/L, milligrams per liter; SWE, snow-water equivalent;  cm, centimeters; d34S, stable-sulfur isotope ratio (34S/32S); Hg, mercury;																									
ng/L, nanograms per liter; NA or empty cell indicates not analyzed; <, below reporting limits; M, presence verified but not quantified; %, percent																									
missing year indicates no sample collected or sample results reviewed and rejected																									
Roth 1994: Mercury in water by CVAFD with potassium dichromate preservation																									
USEPA Method 1631, Rev E: Mercury in water by Oxidation, Purge and Trap, and CVAFS]																									
																									
Station ID	463900111280000																								
Site Name	SPRING GULCH, MT																								
Latitude (dd)	46.65																								
Longitude (dd)	-111.4666667																								
Elevation (ft)	5989																								
SiteNumber	StationName	SampleDate	WaterYear	SampleType	ANC (ueq/L)	SC (uS/cm)	pH	H (ueq/L)	Ca (ueq/L)	Mg (ueq/L)	Na (ueq/L)	K (ueq/L)	NH4 (ueq/L)	Cl (ueq/L)	SO4 (ueq/L)	NO3 (ueq/L)	DOC (mg/L)	Total N (mg/L)	Total Dissolved N (mg/L)	Hg (ng/L) Roth 1994	Hg (ng/L) USEPA 1631	d34S (per mil)	SWE (cm)	Snow Depth (cm)	Ionic Balance (%)
463900111280000	SPRING GULCH, MT	1997-03-12	1997	OB	-4	7	5.1	7.9	5.4	<1.7		1	4	2	5.2	7.1						6.3		94	12.3
463900111280000	SPRING GULCH, MT	1998-03-10	1998	OB	-5	4	5.2	6.3	4	<1.7		<0.5	6.9	<1.1	5.4	8	0.6					5.5		81	12.4
463900111280000	SPRING GULCH, MT	1999-03-09	1999	OB	-1.4	4	5.6	2.5	7	<1.7	<0.9	1.3	7	1.1	4.8	6.6	0.6							66	17.5
463900111280000	SPRING GULCH, MT	2000-03-07	2000	OB	4.6	3	5.4	4	9	3.3	<0.9	8.2	7	<1.1	6.7	7	2.1							51	45
463900111280000	SPRING GULCH, MT	2001-03-08	2001	OB	-5.8	6	5.2	6.3	7.5	<1.7	1.3	<0.5	5.9	3.9	9.2	13.6	0.9					4.8		48	-11.9
463900111280000	SPRING GULCH, MT	2002-03-01	2002	OB	-0.2	4	5.6	2.5	13.4	<1.7	<0.9	1.3	7.7	<1.1	3.1	12.1	0.7			5.3			14	61	24.2
463900111280000	SPRING GULCH, MT	2003-03-03	2003	OB	-1	4	5.5	3.2	8	4	<0.9	10	3.9	1.4	4	7.1	3.1			3.3		7.4	19	66	39.9
463900111280000	SPRING GULCH, MT	2004-02-27	2004	OB	-14.4	5	5	10	4.4	<1.7	<0.9	3.3	8.6	<1.1	6.5	9.3	1.4			2			22	69	24.9
463900111280000	SPRING GULCH, MT	2005-02-25	2005	OB	-3	5	5.3	5	8	2.5	<0.9	3.3	5.5	<1.1	4.4	6.4	1.2			8.4			11	38	38.5
463900111280000	SPRING GULCH, MT	2006-02-24	2006	OB	3.8	4.1	5.8	1.6	9	2.5	<0.9	4.6	6.9	1.4	3.7	7.9	2.53						21	69	37.2
463900111280000	SPRING GULCH, MT	2007-02-23	2007	OB	1	4.1	5.6	2.5	6	1.6	<0.9	1.5	3.7	0.6	3.1	7.9	0.58						15	71	16.8
463900111280000	SPRING GULCH, MT	2008-02-22	2008	OB	9.4	4.6	5.6	2.5	17.5	2.5	1.7	2.3	6.2	1.1	4	6.4	0.81						13	51	57.1
463900111280000	SPRING GULCH, MT	2009-02-20	2009	OB	-0.4	4.4	5.5	3.2	7	2.5	<0.9	3.8	4.2	0.8	4.2	7.9	2.01				5.52		11	43	23.2
463900111280000	SPRING GULCH, MT	2010-02-26	2010	OB	-4.2	4.6	5.3	5	6	1.6	1.3	1	8.9	0.8	4.4	8.6	0.64				2.69		14	58	26.6
463900111280000	SPRING GULCH, MT	2011-02-26	2011	OB	-2.4	3.6	5.4	4	9	2.5	2.6	2.8	<1	1.7	3.1	6.4	3.65				3.63			81	30.2
463900111280000	SPRING GULCH, MT	2012-02-24	2012	OB	12	4	4.9	12.6	8.5	3.3	<0.9	5.1	<1.1	0.8	2.5	3.5	2.5	0.18			2.13		18	76	71.8
463900111280000	SPRING GULCH, MT	2013-02-22	2013	OB	0	4	5.1	7.9	5.5	<1.6	<0.9	1.3	10	0.8	3.1	8.6	0.9	0.17			3.62		14	64	32.8
463900111280000	SPRING GULCH, MT	2014-02-21	2014	OB	8.6	4	6	1	9	2.5	0.9	3.1	1.7	0.8	3.7	6.2	2.3	0.21	0.18				12	56	42.9
463900111280000	SPRING GULCH, MT	2015-02-27	2015	OB	-0.4	2.8	5.6	2.5	3.5	1.6	0.4	2.3	5	1.1	2.7	5	0.82	0.15			4.17		15	43	27
463900111280000	SPRING GULCH, MT	2016-02-26	2016	OB	2.8	2.6	5.5	3.2	2.5	0.8	0.4	1.3	4.7	0.6	1.5	5	2.53	0.2			1.37		17	61	37.7