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I. INTRODUCTION SSS§ 1.2 Mr. Guru Arora of Ghana Properties, LLC and Amandeep Narula of Narula Properties, LLC are proposing to subdivide a 114.87 acre property into 11 single family residential Lots. Two additional Lots are also proposed: Lot"A"to be designated for the stormwater retention basin, and Lot"B"to be designated for the domestic well that will serve this development. The project is in a rural, unsewered area of San Joaquin County, commonly referred to as the"Morada Area." The site is north of the City of Stockton and City water and sewer systems currently terminate south of the project. It is unknown if connections to City services will occur in the future. Domestic water for future development is proposed to be the referenced on-site public well. This report presents the findings of the Nitrate Loading Study and Soil Suitability Study conducted for the proposed subdivision of the subject property. The San Joaquin County Environmental Health Department(EHD)requires Nitrate Loading and Soil Suitability Studies for projects in unsewered and/or currently nitrate impacted areas, or for projects which may potentially impact the underlying groundwater with nitrate. The primary concern of nitrate in drinking water is that high concentrations can cause methemoglobinemia in infants. This disease occurs through a series of complex chemical reactions within the hemoglobin in the blood. Only infants and young children are susceptible. Although this disease is extremely rare, nitrate can also potentially cause other health concerns. There have been scientific studies to suggest that nitrate may produce carcinogenic effects. This report complies with the San Joaquin County Development Title, Section 9-1105.2 for a Nitrate Loading Study and Soil Suitability Study. Additionally, this proposed project must comply with the Environmental Health Department Sewage Standards, specifically Section 10 - "Requirements for Waste Disposal for New Land Developments." SSS§ 1.1 In Section 10.1 of the Sewage Standards, Estate type zoning(Rural Residential -RR-1) shall require a double leachfield system with an alternating distribution box to be installed at time of construction. In addition, Section 3.3.2 (a) states that"for single family dwellings, open land area must be available for addition to the original sewerage system. This land area is to be at least 50% of the amount required by the original sewage system." In summary, the following information was obtained from these studies: Results of the soil percolation testing reveal that either the surface(typical leachline depth)or subsurface soils(sumps or seepage pits) will manage future effluent flows for all 11 proposed Lots. Only Lots 2 and 3 possess percolation at both the shallow and deep perc test depths. This was particularly evident for the soils under the"south half'of the project whereby the surface soils at typical leachline depth are comparatively impermeable,while the deeper soil representative of sumps or seepage pits possesses acceptable permeability. This Study determined the nitrate-nitrogen impact from the proposed 11 residential Lot subdivision, quantified through two differing equations of the scientifically recognized Hantzsche-Finnemore Equation,would theoretically produce a nitrate-nitrogen effluent concentration that is below the Maximum Contaminant Level State Standard of 10 ppm nitrate-nitrogen. Page-1- Chesney Consulting