sampling point
Ledge Beck At Ledge Beck Bridge

Description	LEDGE BECK AT LEDGE BECK BRIDGE
Sampling point ID	NE-49600492
Type	Freshwater – Rivers
Status	closed
Location	easting northing: 457326 496147 lat lon: 54.357622, -1.11939
Area	Yorkshire
Sub-Area	Esk, Derwent, Hull
Summary	19 samples taken between 2015 and 2013

Determinands identify a property which can be measured on a sample or the sampling environment, together with the units in which the result of that measurement will be expressed.

12 determinands have been measured at this site

Alky pH 4.5
Ammonia(N)
Cond @ 25C
N Oxidised
NH3 un-ion
Nitrate-N
Nitrite-N
O Diss %sat
Orthophospht
Oxygen Diss
Temp Water
pH

Samples from 3 Dec 2013 to 4 Sep 2015

Notation	Determinand	Units	3 Dec 2013 11:34	15 Jan 2014 13:05	13 Feb 2014 11:19	28 Feb 2014 14:39	27 May 2014 13:33	7 Aug 2014 11:43	10 Nov 2014 13:23	11 Mar 2015 12:00	8 Jun 2015 11:12	4 Sep 2015 09:54
0061	pH		6.97	7.64	6.25	7.11	8.11	7.67	7.74	7.5	7.94	7.82
0076	Temperature of Water	°C	5.3	5.5	3.2	5.4	11.6	14.2	7.3	3.9	10.2	10.2
0077	Conductivity at 25 C	μs/cm	90	74	65	74	81	111	83	96	111	107
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	0.42	0.45	0.58	0.45	< 0.2	< 0.2	0.36	0.45	< 0.2	< 0.2
0117	Nitrate as N	mg/l	0.416	0.446	0.576	0.446	< 0.196	< 0.196	0.356	0.446	< 0.196	< 0.196
0118	Nitrite as N	mg/l	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	< 4.0e-05	< 0.00017	< 1.0e-05	< 5.0e-05	< 0.00062	< 0.00035	< 0.00025	< 0.00011	< 0.00048	< 0.00037
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	7	< 5	< 5	7	10	20	7	11	19	14
0180	Orthophosphate, reactive as P	mg/l	< 0.02	< 0.02	< 0.02	< 0.02	< 0.02	< 0.02	< 0.01	0.004	0.0065	0.0091
9901	Oxygen, Dissolved, % Saturation	%	97.1	98.8	100.3	94.6	105.5	74.9	80.4	91.9	90.5	70.4
9924	Oxygen, Dissolved as O2	mg/l	12.3	12.4	13.4	11.9	11.4	7.67	9.67	12.1	10.1	7.89

Samples from 12 Mar 2013 to 20 Nov 2013

Notation	Determinand	Units	12 Mar 2013 13:58	28 Apr 2013 15:04	16 May 2013 12:21	18 Jun 2013 10:43	30 Jul 2013 14:19	29 Aug 2013 11:48	23 Sep 2013 13:27	24 Oct 2013 15:47	20 Nov 2013 12:06
0061	pH		8.74	8.61	8.04	7.8	7.48	7.07	7.57	6.89	7.41
0076	Temperature of Water	°C	2	7.1	8.2	11.7	15	14.2	12	9.3	4.2
0077	Conductivity at 25 C	μs/cm	90	94	84	91	103	94	95	80	96
0111	Ammoniacal Nitrogen as N	mg/l	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03	< 0.03
0116	Nitrogen, Total Oxidised as N	mg/l	0.44	< 0.2	0.43	0.22	0.21	0.24	< 0.2	0.4	0.35
0117	Nitrate as N	mg/l	0.436	< 0.196	0.426	0.216	0.206	0.236	< 0.196	0.396	0.346
0118	Nitrite as N	mg/l	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004	< 0.004
0119	Ammonia un-ionised as N	mg/l	< 0.0003	< 0.00044	< 0.00048	< 0.00039	< 0.00024	< 9.0e-05	< 0.00024	< 4.0e-05	< 9.0e-05
0162	Alkalinity to pH 4.5 as CaCO3	mg/l	9	10	6	10	13	9	11	< 5	12
0180	Orthophosphate, reactive as P	mg/l	< 0.02	< 0.02	< 0.02	< 0.02	< 0.02	< 0.02	< 0.02	< 0.02	< 0.02
9901	Oxygen, Dissolved, % Saturation	%	103.3	104	101.4	99.9	99.1	76.1	100.3	104.1	105.1
9924	Oxygen, Dissolved as O2	mg/l	14.3	12.6	11.9	10.8	9.97	7.79	10.8	11.9	13.7