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D. GROUNDWATER INFORMATION <br />NLS§ 2.1, SSS§ 4.1. Groundwater depths and elevations throughout San Joaquin County are illustrated <br />on maps published by the County Flood Control and Water Conservation District. Lines of Equal Depth to <br />Groundwater Maps for the year 2000 illustrate the depth in this locale at approximately 25 ft. In 2018, the <br />depth to groundwater was measured at 40 ft and is most likely deeper due to drought and over -pumping. <br />The Lines of Equal Elevation over the years indicate the groundwater directional flow can be in a north, <br />northeasterly direction, or a westerly direction. <br />NLS§ 2.2, 3.1, SSS§ 2.1, 4.2, 4.4, 4.5. Since surrounding properties have been intensely farmed for <br />several decades, the potential for nitrate contamination in the underlying shallow groundwater can be <br />considered to be significant. However, the test results on the domestic well that will serve subject property <br />contains no nitrate concentration (Non -Detect - ND). This is due to the fact that the well was drilled to a <br />depth of 600 ft. The agrichemical Dibromochloropropane (DBCP) was also found to be Non Detect. <br />Water test results are found in Appendix D. <br />E. CLIMATIC DATA: RAINFALL VS. EVAPOTRANSPIRATION <br />NLS§ 3.2. The following Table illustrates rainfall and evapotranspiration for the Tracy area. <br />Precipitation data was obtained from the Soil Survey of San Joaquin County. The conservative "2 years in <br />10" data was used and not the "average rainfall" data. Evapotranspiration data was obtained from the <br />California Irrigation Management Information System (CIMIS): <br />TABLE 3 <br />PRECIPITATION AND Eto DATA FOR TRACY, CA <br />Month <br />2 Years in 10 will have more <br />precipitation than: (in/mo) <br />Eto Average <br />Potential Deep <br />Percolation (in/mo) <br />(in/mo) <br />(in/day) <br />January <br />2.93 <br />1.55 <br />0.05 <br />1.38 <br />February <br />2.21 <br />2.24 <br />0.08 <br />-- <br />March <br />238 <br />3.72 <br />0.12 <br />-- <br />April <br />1.51 <br />5.10 <br />0.17 <br />May <br />0.71 <br />6.82 <br />0.22 <br />-- <br />June <br />2.09 <br />7.80 <br />0.26 <br />-- <br />July <br />0.28 <br />8.68 <br />0.28 <br />-- <br />August <br />1.05 <br />7.75 <br />0.25 <br />-- <br />September <br />0.84 <br />5.70 <br />0.19 <br />-- <br />October <br />1.06 <br />4.03 <br />0.13 <br />-- <br />November <br />2.10 <br />2.10 <br />0.07 <br />-- <br />December <br />2.38 <br />1.55 <br />0.05 <br />0.83 <br />TOTALS (in.) <br />13.18 <br />57.0 <br />------ <br />2.21 <br />11 <br />Chesney Consulting <br />