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= <br />(Wkipedia, 2019) <br />EiN-1(xi ff0 2 <br />N -1 <br />Project No: 1909 <br />Plate No.: 13 <br />Date: April 24, 2019 LIVE OAK <br />GEO ENVIRONMENTAL INC. <br />Recharge Calculation <br />(Tracy Pumping Plant & Holt <br />Stations - Scenario 2) <br />Kumar Property <br />16895W. Grant Line Rd. <br />Tracy, CA <br />Tracy Pumping Plant (Station 70)* <br />and Holt (Station 248)** <br />Deep Percolation = Precipitation - Evapotranspiration <br />2017 <br />Month Precipitation (in)* Evapotranspiration (in)** Deep Percolation (in) <br />Jan 6.61 1.18 5.43 <br />Feb 5.29 1.48 3.81 <br />Mar 1.53 3.60 <br />Apr 1.80 4.32 <br />May 0.03 7.04 <br />Jun 0.04 7.69 <br />Jul 0.00 8.30 <br />Aug 0.00 6.64 <br />Sep 0.00 4.99 <br />Oct 0.09 3.95 <br />Nov 1.07 1.38 <br />Dec 0.06 1.62 <br />Total 16.52 52.19 9.24 <br />2018 <br />Month Precipitation (in)* Evapotranspiration (in)** Deep Percolation (in) <br />Jan 3.10 0.88 2.22 <br />Feb 0.55 2.56 <br />Mar 2.19 2.87 <br />Apr 1.55 4.75 <br />May 0.00 5.66 <br />Jun 0.00 7.76 <br />Jul 0.00 7.65 <br />Aug 0.00 6.71 <br />Sep 0.00 5.60 <br />Oct 0.26 4.13 <br />Nov 1.96 2.00 <br />Dec 2.14 1.26 0.88 <br />Total 11.75 51.83 3.10 <br />*Data from Western Regional Climate Center (WRCC) <br />**Data from California Irrigation Management Information System (CIMIS) <br />Average Recharge (in) = 6.17 <br />Standard Deviation (in) = 4.3 <br />where {x1, x2, ..., Xn} are the observed values of the sample items, x bar is the mean <br />value of these observations, and N is the number of observations in the sample. <br />Percent Error = Standard Deviation / mean * 100% <br />Percent Error = 70 %