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10 June 2014 <br /> AGE Project No. 14-3035 <br /> Page 11 of 16 <br /> 8.3. CURRENT AND FUTURE USE OF GROUND WATER AT THE SITE <br /> The newly installed water supply well conforms to DWR and EHD standard and will be <br /> used to supply the domestic (including the proposed winery) uses at the property. While <br /> agricultural use has a separate water source well. <br /> 9.0. IMPACT OF NITRATE TO GROUND WATER <br /> Due to the proposed commercial use of the property and the potential for nitrate <br /> leaching into the ground water from the existing septic systems, a nitrate loading <br /> analysis for the future use has been required by the EHD. <br /> 9.1. CURRENT OFF-SITE SOURCES OF NITRATE <br /> Septic systems and agriculture are sources of nitrates in the area of the site. The <br /> property is boarded by agricultural lands which might provide a nitrate source. There are <br /> three to four other residences within 1,000-feet of the site. <br /> 9.2. IMPACT OF RAINFALL CONTRIBUTION TO NITRATE LOAD <br /> The rainfall of the area has been estimated for the nitrate loading analysis. Deep <br /> percolation is estimated by calculating the average monthly rainfall and <br /> evapotranspiration of the site area. If average monthly rainfall exceeds average monthly <br /> potential for evapotranspiration (ETo) there is a potential for deep percolation without <br /> consideration for runoff. Average potential ETo was estimated (annually at 50.3) from <br /> data obtained from the California Irrigation Management Information System (CIMIS) <br /> Lodi West Station #42. The average rain fall data for the area was gathered from the <br /> Western Regional Climate Center summary. The averages were calculated based on <br /> data collected between 1961 to 1990, the yearly rain fall average for the Stockton area <br /> was 13.95 inches (Appendix D). <br /> 9.3. CURRENT ON-SITE SOURCES OF NITRATE <br /> Septic systems, rainfall and agriculture are sources of nitrates (fertilizers) are presented <br /> on the subject property. <br /> The three bathroom (sink and toilet) to accommodate the residents. Residential use <br /> includes clothes wash, showering/bathing, clothes washing cooking and hand washing. <br /> The reasonable or maximum usage of wastewater the three bathroom facility by <br /> residents is 120 gallons per day (gpd) per bathroom or a total of 360 gallons per day. <br /> Advanced GcoEnrironmen[al,Inc. <br />