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• The Conditions of Approval, dated January 26, 2010, state the"the report shall address the conversion of the existing family residence into a religious facility..." This single family residence (SFR) is to be removed from the project site and will not be incorporated into the Hindu Temple project. • As illustrated on the attached Septic System Plans,the primary disposal area and the required 100%reserve/replacement/addition area is situated at the northwest corner (NWC)of the subject property. When septic system failure occurs at some point in the future, approximately five parking stalls will have to be removed to accommodate the I� reserve area. • Although ultimate wastewater flow volumes emanating from the completed project are unknown, the average daily flow(ADF) volume is based upon the Approved Use of 81 total people, every Saturday of the calender year and assigning 10 gallons per person based on the SJC Sewage Standards, for an ADF of 810 gpd. In summary,the soils testing and investigation has found the indigenous soils under the proposed domestic wastewater disposal area to contain a predominately fine-grained silty clayey material with marginal percolation capabilities. Percolation test results indicate the surface soils down to 42" possess slow percolation capacity. The soils at the 25 ft depth representative of seepage pits have poor(failing)permeability. An"unofficial'perc test was conducted at 8 ft in depth in the proposed stormwater retention basin area, -120 ft to the east of the primary effluent disposal area. This test indicated excellent permeability at the 8 ft depth. Although this depth can be representative of sumps, seepage pits will be installed. As the effluent eventually rises in the seepage pits, it will encounter this permeable stratum and provide additional lifespan to the system. Although the percolation test results show acceptable permeability(except for the 25 ft deep test), 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 Morada area �G 1 of Stockton. Although the clay soils foster biomat formation, they also provide a measure of protection against nitrate formation in the underlying groundwater, also widely observed by EHD and confirmed through testing of the on-site well for this project. II. SOIL SUITABILITY STUDY FINDINGS A. SUBJECT PROPERTY AND SURROUNDING STUDY AREA INFORMATION SSS§ 1.1. Surrounding land use to the north is, and has been, in low density housing on large lots and ranchettes. To the west is Highway 99 and residential subdivisions. To the east is another L� z ) religious facility and rural residences. To the south is agricultural production land currently in cherries. The property is zoned R-R, Rural Residential. 2