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• Conduct soil physical and chemical testing to determine the following: Physical testing included percolation testing and particle size analysis of the soil characteristics underlying the effluent`disposal area.: Chemical testing included analyses for the constituents that influence nitrateloading. • Groundwater depth was measured by abackhoe-test pit which is the method most preferable to EHD: The aforementioned on-site domestic well was also sounded._ Since there was no electricity to this well, chemical analysis to assess and quantify nitrate loading potential to the underlying groundwater could not be ascertained. • Mounding Analyses of the.water table underlying the proposed di posa area has been i' calculated for this,project since.the water table was measured-to 9.5 et below existing- grade. • As illustrate&on-the Site Plan prepared-by the farm of Shack acid Company, it has been determined that the primary disposal area and the required 100%reserve/replacement/- addition.area can be easily situated at the south property border of the subject property. • Although ultimate wastewater flow volumes emanating from the completed project are unknown, the average daily flow(ADF) volume was formulated using all available parameters acceptable to EHD: Average daily flow volumes of domestic blackwater are expected to-be very-small due to cultural practices within the Muslim Faith. It is my understanding there will be a,food consumption area; however, there will be no cooking. . In summary,_the soils testing and investigation:has found the indigenous soils under the proposed domestic wastewater disposal area at the anticipated soil-effluent interface.to contain a predominately fine-grained silty, clayey material with comparatively rapid percolation capabilities. Infiltration and percolation test results indicate the surface soils down to two feet to possess very slow infiltration and percolation capacity, while the soils at the 36 to 42 inch depths possess . excellent permeability given the encountered soil type. The excellent.subsurface permeability at_ the 36-42 inch depths has been observed throughout the Tracy area clay soils. Typically, clay soils do not exhibit a high degree of.permeability. However, the Tracy clay soils must possess a polarity . .. that is conducive to promoting water movement through the micropores of the clay. Although the percolation test results show.acceptable permeability, effluent long-term acceptance rates by the indigenous soils will decrease. This premise is based on the number of septic system. failures that have occurred,-and witnessed'by EHD in the Larch-Clover area of Tracy. . Due to the excellent perc rates obtained and the measured depth to the water table (9.5 ft), a gravity operated filter bed disposal system for effluent=disposal maybe installed for this project under EHD requirements and regulations. 2 Chesney Consulting