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ITEM 3.3 - S-Fence for Stormwater Controls <br /> Install 10" ERTEC S-Fence (or pre-approved equivalent) along the downstream portion of the <br /> site to protect the ephemeral drainage. CONTRACTOR will provide and properly install S-Fence <br /> at the direction of the PROJECT MANAGER. S-Fence must be installed according to Section <br /> 22.4 of the 2009 General Bid Specification. An estimated one hundred linear feet (100 If) of S- <br /> fence will be used during project construction activities. All S-fence will be installed according to <br /> the manufacturer's specifications, which are included below, and will be removed following <br /> completion of construction activities. <br /> ERTEC 10" S-Fence Specifications <br /> Perimeter Sediment Control— alternative to silt fence — non-traffic Sediment Control <br /> PRODUCT: <br /> S-Fence TM <br /> The system shall comprise semi-rigid, overlapping layers of thermally extruded, apertured <br /> polymeric high density polyethylene (HDPE) sheets, and one or more integrated filter sheets. <br /> The system shall be durable, such that it can be used for many subsequent jobs. The Sediment <br /> Control System shall have an integrated filter fabric. The system shall be recyclable at the end <br /> of life. The system shall also conform to the following: <br /> Specification Requirements <br /> Height, inches, min. 10 /14 <br /> Mass per Unit Weight, (pounds/foot) (maximum —wet or dry) 0.35 / 0.48 <br /> Tensile Yield ASTM D-638 (lb/in2) 1800 - 2800 <br /> Ultimate Tensile Strength: ASTM D-638 (lb/in2) 2000 - 2800 <br /> Filter Average Opening Size (AOS) (ASTM D 4751) , microns 250 <br /> Ultraviolet stability (outer jacket & filter), percent tensile strength retained <br /> after 500 hours, min. ASTM Designation: D 4355 95 <br /> San Diego State University SERL soil retention test — 3 consecutive 10 yr storms 81% <br /> Life in application (years - minimum) 4+ <br /> Recycled Material Content (minimum) 90% <br /> Reusable and Recyclable YES <br /> * or appropriate test method for specific polymer <br /> Product Sheet. A copy of the manufacturer's product sheet together with instructions for <br /> installation shall be furnished to the Engineer 5 days before installation. <br /> Stakes. Installations shall use wood stakes on the downstream side for reinforcement against <br /> high flows. Wood stakes shall be 1" x 2" x 18". Wood stakes shall be untreated fir, redwood, <br /> cedar, or pine and cut from sound timber. They shall be straight and free of loose or unsound <br /> knots and other defects which would render them unfit for the purpose intended. Metal stakes <br /> can be used for installations lasting longer than 18 months. Install stakes to within 2" from the <br /> top of S-Fence. Stakes should be positioned every 80 inches along the installation — at segment <br /> overlaps. <br /> Installation: <br /> Sediment control filter system shall be installed as follows: <br /> A. A trench or slot shall be excavated at the downstream perimeter of the site or at elevation <br /> contours to a depth of at least 3 inches and at least 2 inches wide. The trench shall be cleared <br /> Page 1 19 <br />