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r 32. That approval of the design for the line, grade, and structural sections for the streets serving this development be withheld pending final design and revieca by the City Engineer. 33. That vertical P.C.C. curbs and gutters be constructed within this development unless otherwise approved by the City Engineer and that the curb and gutter be poured monolithically with the sidewalk when the sidewalk is adjacent. 34. That detailed grading and drainage plan and all supporting information and design criteria be submitted as part of the improvement plans for the development. 3~• That the minimum grade for gutter flowlines be set at 0.5~ unless otherwise approved by the City Engineer. Grades less than O.So down to 0.3% shall require special approval, submittal of as-built grade sheets, and con- trolled flow testing. 36. That all existing wells, septic tanks or holding tanks on the site be properly sealed, filled and abandoned prior to the start of grading operations unless Zone 7 retains specific wells for observation wells, or special approval is obtained from the City Engineer for temporary use of an existing well for construction water. 37. That the haul route for all materials to this development be approved by the City prior to approval of the final map or the any construction. 38. That the developer submit an erosion and control plan or procedure as part of the plans prior to the approval of the final of any construction. and from Engineer start of sedimentation improvement map or the start 39. That the developer submit a dust control plan or procedure as part of the improvement plans prior to approval of the final map or the start of construction. 40. That storm drainage system be privately maintained by the property owners or through an association approved by the City.