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ADD. ONAL INFORMATION REQUIRE, ,NTS <br />CASTELLO ESTATES SUBDIVISION <br />TRACY, SAN JOAQUIN COUNTY <br />Please provide the following information: <br /> <br />1. Please provide a written statement of understanding, on San Joaquin County Department <br />of Public Works (SJCDPW) letterhead, that states the SJCDPW will have ultimate <br />ownership and operation jurisdiction for the wastewater treatment plant. <br /> <br />2. A description of all wastewater conveyance (pressure/gravity) systems planned for the <br />development, and a description of stormwater disposal. Describe the disposal of <br />stormwater which falls on the subsurface infiltration area and any upslope land areas <br />which might drain to or through the proposed subsurface infiltration area. Is the <br />infiltration area in a flood hazard area? Describe the moisture sensor response to <br />extended periods of rain, and resulting impacts to wastewater disposal. <br />3. A process flow diagram, treatment system design drawings, treatment plant site plan, and <br />a scaled map showing the limits of an expansion area equal in size to the original <br />subsurface disposal area in the event the original disposal field fails. <br /> <br />4. Further description of assumptions used for calculation of the flow rates and a <br />description of the safety factors incorporated in the wastewater characteristics and flow <br />rate assumptions. Present projected infiltration/inflow rates and peaking factors used in <br />design calculations. Also address the following: <br />Average dry weather flow <br />Peak wet weather flow <br /> <br />5. Calculations of treated effluent quality, including biochemical oxygen demand, total <br />suspended solids, total dissolved solids, nitrogenous compounds, and total coliform <br />organisms. This may be based on standard engineering references or certified analytical <br />laboratory reports for similaulants with consideration of the actual water supply <br />character. <br />6. Address the need for a polishing pond downstream of the package treatment plant and <br />prior to the subsurface disposal field. <br />7. Describe how odors will be controlled in the anaerobic denitrification zone. <br />8. In all aerobic treatment cells, 1.0 mg/1 dissolved oxygen will be required; please address <br />what changes will be required to meet this criterion (the RWD states 0.5 mg/1 dissolved <br />oxygen will be maintained). <br /> <br />9. Provide a chemical characterization of the potable water supply including pH, hardness, <br />alkalinity, and a complete ion scan with anion/cation balance. Discuss water softening <br />and other water treatment processes that will be needed and the relationship between <br />water supply treatment and wastewater treatment plant effluent quality. <br />10. Narrative description of handling, storage, and disposal procedures for: <br />a. Debris