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ii. Final slope grades shall not exceed 3.5:t unless <br /> ten'acing of retainimz walls are approved. <br /> <br />iii. Bermin~ for parking lots and open space areas shall <br /> n.ot exceed 3:1. <br /> <br />Soddina and Ground Cover. All areas not other wise <br /> <br />improved in accordance with approved site pla,ns shall be <br />sodded. -' <br /> <br />~, Irri~ation. <br /> <br />i. All landscat~imz areas required under this section shall <br /> include underm'ound in'i~ation systems. All irri~ation <br /> <br />systems must have an at>proved backflow device <br />installed in the irri,.zation enclosure, hTiaation <br /> <br />enclosure location and construction mater/als are <br /> <br />subiect to the approval of the City Enmneer. Further, <br />all new or updated systems must insta[I a Rain Sensor <br /> <br />devJ c e to stop irri cation dur/n ~ rain. events. <br /> <br />ii. Exceptions include landscape areas that are left in a <br /> natural state. <br /> <br />ParMng Lot Landscaping. Alt parkina lots are required to <br />provide internal overstolpv.' tree plantings in an effort to shade <br />parkine surfaces and provide visual relief. Plantinas are required <br />at the followina mflqimum schedule. The planting schedule is <br />established to provide m~ acceptable number of plantings that <br />may be planted in re~pular symmetrical patterns or irrezular <br />clusters or ~'oupings. <br /> <br />a. 1 tree per every '10 parking spaces. <br /> <br />Every overst°rv tree plantina shall be provided with a <br />plantina area of 162 square feet. <br /> <br />Co <br /> <br />Acceptable cround cover materials include god, mulch, <br /> <br />and other natural m'ound cover. Landscapine rock and <br /> <br />ct. <br /> <br />plastic underlavment is not alilowed. <br /> <br />All pai'king lot plantine areas shall include underm'ound <br />im~ation systems, <br /> <br />220 <br /> <br />9-190 <br /> <br /> <br />