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<br />Resolution No. PC-9S-78 <br />Page 14 <br /> <br />g. The design of the water system shall ensure that on an <br />average day, the water pressure shall not fall below 40 <br />psi, at the peak hour the pressure should not fall below <br />30 psi, and with fire flow on a maximum day, the water <br />pressure shall remain at least at 20 psi, all of which <br />shall be measured at the meter. <br /> <br />h. Pressure reduction valves (PRVs) shall be installed at <br />the house to lower the water pressure to 80 psi, at all <br />homes where deemed necessary. No PRVs shall be permitted <br />at curbside. <br /> <br />i. Piping between the water meter and the PRV shall be 1.5- <br />inch minimum diameter and upgraded to Schedule 80, or as <br />determined by the Chief Building Official, to accommodate <br />the expected higher water pressures. All service laterals <br />between the main and the meter shall be 1.5 inch minimum <br />diameter and shall be upgraded to accommodate the <br />additional water pressure, as determined by the City <br />Engineer. <br /> <br />j. A corrosion engineer shall determine the suitability of <br />the soils to accept ferrous metal pipes. <br /> <br />k. The developer shall disclose to all buyers of affected <br />properties (lots above elevation 670 feet) that the <br />static water pressure when the tank is empty will be less <br />than 40 psi. This notice shall be reviewed and approved <br />by the City Attorney prior to sale of any unit in this <br />project. This notice shall be included in all deeds to <br />individual properties. <br /> <br />I. Prior to City Council approval of the Final Map, the <br />developer shall have prepared a soils investigation for <br />the proposed tank site to determine its geotechnical <br />suitability. <br /> <br />~ Sewer <br /> <br />52. All sanitary sewers and laterals shall be designed to flow by <br />gravity, except for Lots 10 13. For these lots, the <br />developer shall install individual sewer grinder pumps, which <br />shall be connected to a common force main. The developer's <br />engineer shall submit for the City Engineer's approval the <br />pump data on the grinder pump to be installed. Unless <br />otherwise approved by the City Engineer, the grinder pumps <br />shall be installed with the subdivision improvements. <br />