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Show IV. RECOMMENDED MANAGEMENT PROGRAM IV. A. Monitoring IV. A. 1. Shoreline water quality and gray water. A routine bacterial monitoring program at the primary swimming beach and marina areas will be established ( Table 4). Multiple samples will be taken every two weeks during periods of heavy use. The objective of this program is to monitor compliance with recommended water quality standards for contact recreation, although the resulting data could also be compared with beach usage trends or used to detect the source of violations. Another major objective of the monitoring is to assess gray- water effects in marinas and popular houseboat anchorages on the lake. Similar programs are in place at Indiana Dunes National Lakeshore, Fire Island National Seashore, and Golden Gate National Recreation Area. Urban influences in each of these areas create short- duration bacterial contamination episodes that are much more severe than those encountered at Lake Powell. In these cases, monitoring data are frequently used by park management to identify areas where a temporary health hazard may exist so that warning signs can be posted. Equipment presently available in Glen Canyon NRA will be used, including a Hydrolab 4000 instrument for measuring water temperature, specific conductance, pH, and dissolved oxygen in sampling zones. A fully- equipped laboratory within the park will be used to analyze the samples. The lab contains Millipore microbiological apparatus for determining total and fecal coliform bacterial contamination. The NRA intends to apply for state certification of the laboratory in Utah in the near future. Water sampling, sample handling, and analysis procedures will follow Environmental Protection Agency recommendations ( USEPA 1979). IV. A. 2. Water quality of rivers for recreational use. The National Park Service will monitor the quality of river waters in the NRA and their important tributaries through a survey of each river segment for chemical/ bacterial data. Hydrolab parameters, major ions, total coliform bacteria, fecal coliform bacteria, and fecal streptococci bacteria will be measured. Three of the trips will include sampling for Giardia at appropriate sites ( particularly smaller tributary areas). Two sampling trips will be conducted in spring during high flow, two during summer, and one in fall or winter. One major river segment will be monitored each year, except when special situations arise demanding extra problem- assessment monitoring. The proposed order of survey is as follows: Escalante River; Colorado 66 |