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6 r� The direction of shallow ground-water flow has consistently been to the southeast during the last three years with only slight fluctuations of shallow ground-water levels beneath the area. The ground-water elevation contour maps for March and October 1994 (Figures 5 and 6, respectively) illustrate the shallow ground-water flow direction and areal change in ground-water levels rte, between the early spring and fall of that year. During 1995, the water table declined to the lowest observed levels by late spring to summer and generally recovered by the fall, as shown in ground-water elevation contour maps for these periods (Figures 7 and 8, respectively). The water n table fluctuated similarly during 1996, although with a slight shift in flow direction toward the east-southeast (Figures 9 and 10, respectively). The direction of flow returned toward the southeast by January 1997 (Appendix). The ground-water gradient became slightly more shallow between 1994 and 1995 as water levels to the northwest declined slightly while those to the r� southeast remained fairly stable. The gradient continued to flatten slightly during 1996 as water levels to the southeast rose slightly. �+ The contour maps were prepared without including the observed water levels from the deep South Tracy #1 or Brown's #1 wells because they are representative of the deep ground water zone. Also, the observed water levels from the Petz well, which is completed in both shallow and deep zones of the underlying aquifer, were not used in preparing the contour maps. The Petz well water levels have been in an intermediate elevation range between those measured in wells solely completed in the shallow or deep wells, and may represent a "composite" of shallow and deep zone water levels. Ground-Water Quality �-; General mineral analyses of ground-water samples conducted during the last three years indicated that the ground water beneath the area is hard to very hard with intermediate electrical conductivity (EC) and total dissolved solids (TDS) values (Tchobanoglous, 1985), as shown in a Table 2. Hardness values ranged from 230 to 360 mg/l (Figure 11), and EC values ranged from 790 to 1,100 umbo/cm with the highest EC values in samples from the shallow wells (Figure 12). Samples from all wells were of a similar sodium/calcium quality, but the proportions of major © L1JHUORFF & SCALMAiNINI G 0 N 5 U L T I N G L N G I N F F,a S