Standard Guide for Monitoring Aqueous Nutrients in Watersheds
|Publication Date:||10 June 1997|
|ICS Code (Examination of water for chemical substances):||13.060.50|
1.1 Purpose--This guide is intended to provide general guidance on a watershed monitoring program directed toward the plant nutrients nitrogen and phosphorus. The guide offers a series of general steps without setting forth a specific course of action. It gives assistance for developing a monitoring program but not a program for implementing measures to improve water quality.
1.2 This guide applies to waters found in streams and rivers; lakes, ponds, and reservoirs; estuaries; wetlands; the atmosphere; and the vadose and subsurface saturated zones (including aquifers). This guide does not apply to nutrients found in soils, plants, or animals.
1.3 Nutrients as used in this guide are intended to include nitrogen and phosphorus in dissolved, gaseous, and particulate forms. Specific species of nitrogen include: nitrate, nitrite, ammonia, organic, total Kjeldahl, and nitrous oxide. The species of phosphorus include total, total dissolved, organic, acid-hydrolyzable, and reactive phosphorus as described in (2)
1.4 Safety--Health and safety practices developed for a project may need to consider the following:
1.4.1 During the construction of sampling stations:
220.127.116.11 Drilling practices during monitoring well installations,
18.104.22.168 Overhead and underground utilities during monitoring well drilling,
22.214.171.124 Traffic patterns/concerns during sampling station installation,
126.96.36.199 Traffic patterns/concerns during surveying sampling station locations and elevations,
188.8.131.52 Drilling through materials highly contaminated with fertilizers, and
184.108.40.206 Installing monitoring equipment below the soil surface.
1.4.2 During the collection of water samples:
220.127.116.11 Using acids for sample preservation,
18.104.22.168 Sampling during flooding events and ice conditions,
22.214.171.124 Traffic on bridges,
126.96.36.199 Condition of sampling stations following flood events,
188.8.131.52 Sampling of water or soils, or both, highly contaminated with fertilizers,
184.108.40.206 Conditions of sampling stations resulting from vandalism,