Scientific Investigations Report 2006-5073

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006-5073

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Table 4. Field measurements and concentrations of nutrients, organic carbon, and suspended-sediment collected at six sampling sites during spring, southern part of Hood Canal, Mason County, Washington, March 2004.

[Locations of sampling sites are shown in figure 1. Abbreviations: USGS, U.S. Geological Survey; mg/L, milligram per liter; µS/cm, microsiemen per centimeter at 25°C; °C, degrees Celsius; N, nitrogen; <, less than; –, not available]

Map No. USGS site No. Sample
date		 Dissolved
oxygen
(mg/L)		 pH
(standard
units)		 Specific
conductance
(µS/cm)		 Water
temperature
(°C)		 Ammonia
(mg/L as N)		 Nitrate
plus nitrite
(mg/L as N)		 Particulate-N
(mg/L)
U1 12063520 03-18-04 11.0 7.8 98 9.9 <0.04 0.28 <0.02
SP2 12065010 03-18-04 12.0 7.7 56 8.6 <.04 .16 <.02
SP3 12065100 03-25-04 11.3 7.4 55 8.0 <.04 .14 .04
SP4 12062550 03-18-04 11.9 7.2 66 8.5 <.04 .12 <.02
SP5 12062560 03-25-04 10.9 7.0 53 8.0 <.04 .4 .02
T1 12068020 03-25-04 10.8 7.2 46 8.5 <.04 .11 .02
Map No. USGS site No. Sample
date		 Total
nitrogen
(mg/L)		 Total
carbon,
particulate
(mg/L)		 Inorganic
carbon,
particulate
(mg/L)		 Organic
carbon,
particulate
(mg/L)		 Organic
carbon,
dissolved
(mg/L)		 Suspended
sediment
(mg/L)
U1 12063520 03-18-04 0.33 0.2 <0.1 0.2 2.5 4
SP2 12065010 03-18-04 .21 .4 <.1 .4 – 3
SP3 12065100 03-25-04 .20 .8 <.1 .7 2.9 8
SP4 12062550 03-18-04 .16 <.1 <.1 <.1 1.0 1
SP5 12062560 03-25-04 .49 .5 <.1 .5 3.3 7
T1 12068020 03-25-04 .15 .3 <.1 .3 1.7 9

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