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• • • Capping Fill System Diagram • • • • • - 10 feet minimum • :- . 10 feet minimum \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ \\\\\\\\\\\\\\\\\\\\\\\\ Fill -10 to 16 inches depending on distribution technique y`�d l; 12" trench depth _ A3f� Original ground : � 3�� tea! surface • • Drain Media • Capping Fill Construction Requirements. Construction Requirements: The cap shall be constructed in accordance with permit requirements. Unless otherwise required _ • , the construction sequence shall be as follows. • a. Cdnstruction of capping fills may only occur between June 1 and October 1 unless otherwise allowed. The upper twenty-four • inches of soil must not be saturated or at moisture content which causes loss of soil structure-and/or porosity when worked. b. The fill.material must be compatible with the native topsoil on the site. The fill soil must be.examined and approved by a • sanitarian from our office prior to placement on the drainfield site. c. .The drainfield site and the borrow site must both be scarified (plowed or disced) to destroy the vegetative mat. d. Apply fill to the drainfield site and work in.(rototill) so that the two contact layers (native soil and fill) are incorporated. Evenly grade fill material to a final depth of 10" for equal distribution or 16"for serial distribution: This will result in a six or twelve inch settled fill depth. . e. Install drainfield as specified in construction permit. There must be a minimum of 10 feet separation between the edge of the fill and the nearest trench sidewall. f. Following inspection and_approval, backfill the trenches carefully. The site must be planted with grass, and protected from livestock, automotive traffic, or other activity that would damage the system. • Required Inspections: The following minimum inspections must be performed for each capping fill installation. • a. Both the drainfield site and the borrow material must be inspected for scarification, soil texture, and moisture content prior to • cap construction. b. After the cap is placed, an inspection must be made to determine that there is good contact between fill material and native soil (no obvious contact zone visible), adequate depth of material, and uniform distribution of fill material. c. A pre-cover inspection of the installed drainfield must be made. A completed "as-built" record of the installation must be submitted with the request for this inspection. d. A final inspection must be made after the system has been backfilled, finish-graded, and seeded. A Certificate of Satisfactory completion may be issued following this inspection. NOTE: The_system installer is responsible for final backfilling and grading_of the system. The property owner Fs responsible for establishing a vegetative( •er within 30 days of the final grading of the cap.