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2.25 1.7 Average Recharge = Standard Deviation (in) = 8 = 0hitapecha, 20191 E'iv= (x -2) N - 1 Project No: 2121 Plate No.: 14 Date: June 8, 2021 Recharge Calculation (Ripon Station) Martin Property 6103 W. Delta Ave. Tracy, CA LIVE OAK GEO ENVIRONMENTAL INC. Ripon (Station 249). Deep Percolation = Precipitation - Evapotranspiration 2017 2020 Month Precipitation (in) Evapotranspiration (in) Deep Percolation (in) Month Precipitation (in) Evapotranspiration (in) Deep Percolation (in) Jan 5.33 1.96 3.37 Jan 0.90 1.33 Feb 3.49 2.73 0.76 Feb 0.01 3.19 Mar 1.53 3.93 Mar 1.32 3.49 Apr 1.30 4.96 Apr 0.79 5.51 May 0.10 7.62 May 0.53 7.50 Jun 0.01 8.47 Jun 0.02 8.58 Jul 0.00 8.95 Jul 0.00 8.74 Aug 0.00 7.33 Aug 0.02 7.22 Sep 0.01 5.50 Sep 0.01 5.35 Oct 0.07 4.24 Oct 0.01 4.00 Nov 0.95 1.81 Nov 0.14 2.19 Dec 0.09 1.83 Dec 1.25 1.34 Total 12.90 59.33 4.13 Total 5.00 58.44 o 2018 Month Precipitation (in) Evapotranspiration (in) Deep Percolation (in) Jan 2.83 1.12 1.71 Feb 0.79 2.86 Mar 1.56 3.39 Apr 1.29 5.63 May 0.11 7.77 Jun 0.00 8.91 Jul 0.00 9.01 Aug 0.01 7.44 Sep 0,02 5.80 Oct 0.33 4.10 Nov 1.78 2.08 Dec 2.42 2.02 0.40 Total 11.10 60.13 2.11 2019 Month Precipitation (in) Evapotranspiration (in) Deep Percolation (in) Jan 1.16 1.84 Feb 261 1.83 98 Mar 2.85 3.34 Apr 0.32 5.55 May 1.53 6.35 Jun 0.01 8.58 Jul 0.00 860 Aug 0.01 7.55 Sep 0.09 5.58 Oct 0.01 4.28 Nov 1.31 2.20 Dec 2.84 1.05 1.79 Total 12.90 56.75 2.77 'Data from California Irrigation Management Information System (CIMIS) where (x1, x2, ..., Xn) are the observed values of the sample items, x bar is the mean value of these observations, and N is the number of observations in the sample. Percent Error = Standard Deviation / mean • 100% Percent Error = 76 %