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Data from the National Climatic Data Center's Hayden Station is used <br />here to evaluate the precipitation trend. For this year, 29.66 inches <br />of precipitation was measured, which was 2.18 inches (13R) less than the <br />1961-1990 average. Only November, February, July and August were above <br />average. Snowpack runoff, as estimated by totaling November through <br />April precipitation values, was 8.40 inches, which was 0.01 inches <br />(0.1$) below the 1961-1990 average. <br />Snowpack runoff, estimated using the Seneca II-W precipitation gage, was <br />7.87 inches (November-April total), which is 1.32 inches ;(19y) less than <br />the Seneca II-W 1990-2001 average. These values are more consistent <br />than the-Hayden Station data when evaluating the spring. runoff. observed . <br />this year at Seneca II-W. <br />Ground Water <br />Water Levels. Water levels for all wells that are in the. current <br />monitoring program are presented in Appendix C. Hydrographs of all <br />historic data for each well are presented prior to the water level <br />reports (for all data since 1991) for each respective well in the same <br />appendix. By presenting all historic data, trends related_to seasonal <br />and annual variability are more clearly evident. ~ Water level <br />measurements are taken with an electrical water level indicator, or in <br />the case of a few shallow alluvial wells, directly from a steel tape. <br />Site information, including sampling frequencies, is presented in Table <br />3, Summary of Ground Water Monitoring Wells. Ground water level <br />monitoring frequencies are listed in Appendix 15-3a of the Seneca II-W <br />PAP. <br />- Alluvium. The alluvial monitoring Wells WHAL6-1, 6-2, 6-3, 6-4, and <br />7-2 are located along Hubberson Gulch. All wells exhibit water level <br />seasonal variations typical for the alluvium, i.e., shallow after the <br />spring recharge, deepening towards the fall. Water levels at Wells 6-1 <br />to 6-3 are now higher than they had been initially in May through July, <br />due to irrigation introduced to that area in May 1989. Well WHAL10 is <br />located approximately one-half mile downstream of the NPDES 006 pond on <br />3 <br />