1632 46TH ST SE 2020-06-18 - Laserfiche WebLink

• July 3, 2017 Single-Family Residence L&A Job No. 17-079 Page 9 from entering the storm sewer system. The filter sock should be cleaned frequently during construction to prevent clogging, and should be removed after completion of construction. Otherwise, collected water may be dispersed through a perforated pipe onto a gently-sloped well-vegetated area at the base of the steep slope. Spoil soils should be hauled off of the site as soon as possible. Spoil soils and imported structural fill material to be stored onsite should be securely covered with plastic tarps, as required, for protection against erosion. SITE PREPARATION AND GENERAL GRADING Vegetation should be cleared and grubbed within construction limits and should be protected and maintained beyond. Loose topsoil and weak weathered soil within building pad of the proposed residence should be completely stripped down to the dense advance outwash soil within building pad of the residence. The exposed soils should be compacted to a non-yielding state with a mechanical compactor and proof-rolled with a piece of heavy earthwork equipment. EXCAVATION AND FILL SLOPES FOR GENERAL GRADING WORK Under no circumstance should excavation slopes be steeper than the limits specified by local, state and federal safety regulations. Unsupported temporary cuts more than 4 feet in height should be no steeper than 1H:1V in topsoil and weathered soil, and no steeper than 1/211:1V in the underlying dense advance outwash soil. Permanent cut banks should be no steeper than 2H:1V in topsoil and weathered soil, and no steeper than 1-1/2H:1V in the underlying advance outwash soil. The soil units and stability of cut slopes should be LI.U & ASSOCIATES, INC.