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4350 E.Acampo Road Project No.2018-0043 P a g e 13 <br /> ' NITRATE LOADING STUDY <br /> 4350 E.ACAMPO ROAD <br /> ACAMPO, CA 95220 <br /> 1.0 INTRODUCTION <br /> Petralogix Engineering, Inc.has been retained by Mr.Antonia Rosales to conduct a Nitrate Loading <br /> Study for the property located at 4350 E.Acampo Road,Acampo,CA 95220,San Joaquin County, <br /> California. The site assessor parcel number is (APN): 209-210-59. <br /> ' The San Joaquin County Environmental Health Department recognizes nitrate contamination as a <br /> significant threat to the surface and groundwaters of the County. Groundwater quality may be <br /> impacted by nitrate contamination where percolating effluent leaches into the ground, should this <br /> ' effluent reach groundwater.Due to the EHD concerns regarding nitrate leaching into the surface and <br /> groundwaters from septic systems,a nitrate loading study is required by the EHD for the proposed <br /> development to measure the potential concentration of percolating effluent and rain fall over a long <br /> period of time. This report has been prepared to meet the requirements of the San Joaquin County <br /> EHD's Nitrate Loading Study Requirements Checklist,dated July 14, 2003. <br /> A simple mass balance formula, as discussed in the article by Hantzshe and Finnemorel in Ground <br /> Water, provides a method for nitrate loading analysis to estimate long-term groundwater nitrate <br /> impacts for a wide area. Based on the Hantzshe and Finnemore study, water quality in the upper <br /> saturated groundwater zone approximates the quality of percolating recharge waters, which the <br /> authors believe is a reliable planning tool to estimate the potential impact to groundwater,as well as <br /> a useful source of analysis to official planning agencies. The equation utilized by the Hantzshe and <br /> Finnemore approach considers the development area, soil denitrification factor, rainfall volume, <br /> rainfall nitrate concentrations,waste effluent quantity,and waste effluent nitrate concentration.The <br /> formulas, calculations,and assumptions are provided on Plates 7 and 8.The units of nitrate used in <br /> the mass balance equation are nitrate-N, whose maximum drinking water contaminant level is <br /> ' 10 mg/L. <br /> 1.1 Description of Site <br /> The property is located at 4350 E.Acampo Road(APN: 209-210-59),Acampo,County of San Joaquin, <br /> California. The parcel is 2.68 acres. The parcel has an existing 3-bedroom, 2-bathroom home. The <br /> property is located in a rural-residential neighborhood,adjacent to N 99 Frontage Road. The general <br /> ' vicinity consists of rural residential lots and agricultural use. <br /> The elevation at the Site, according to a United States Geological Survey2, is approximately 60 feet <br /> above mean sea level (msl).The site is relatively flat,with topography in the area grading gently to <br /> the southwest. <br /> Hantzshe N., Finnemore,E.J., 1992. Predicating Ground-Water Nitrate-Nitrogen Impacts. Ground Water,Vol 30, No 4. <br /> ' <br /> Petralogix EngZirMiftiftical Survey,2015,7.5'Topographic Map,California,Lodi North Quadrangle. <br /> 2667 <br /> 2fi675 eruella Road,Galt Ca 95632 <br /> (209)-900-5729 <br /> w .petralogix.com <br /> 1 <br />