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Notification #1600-2018-0342-R3 Streambed Alteration Agreement October 28, 2019 Page 13 of 24 2.4 Hollow Open-ended Posts, Pipes or Voids between Sheet Pile Walls. No exposed hollow open-ended posts or pipes in a vertical, skyward orientation shall be installed as part of the project or stored/staged on the project site. All pipes, posts or voids between the sheet pile walls on the project site which are exposed to the environment shall be immediately capped, screened or filled with material by Permittee. Escape ramps approved by CDFW may be used for the sheet pile walls. 2.5 Posts with Exposed Perforations. Any post with exposed perforations installed on the project site and exposed to the environment shall have the holes permanently filled within the top six inches of the post upon installation by Permittee. 2.6 No Hardscape Structures Includina Concrete or Rock Rio Rap Below Too of Bank No hardscape structures such as concrete or rock rip rap shall be installed below the top of bank as part of this project other than that described in the project description. Permittee shall act immediately upon CDFW request to remove any unauthorized materials below top of bank. 2.7 No Monofilament Netting. Permittee shall not use erosion control materials containing plastic monofilament netting (erosion control matting) or similar material containing netting within the project area due to documented evidence of amphibians and reptiles becoming entangled or trapped in such material. Acceptable substitutes include coconut coir matting or tackified hydroseeding compounds. 2.8 No New Project Phase without Erosion Control. No phase of the project may be started if that phase and its associated erosion control measures cannot be completed prior to the onset of a storm event if that construction phase may cause the introduction of sediments into the stream. Erosion control measures shall be inspected frequently to minimize failure and conduct any necessary repairs. All non-structural related and non -biodegradable erosion control measures shall be removed from the project area upon cessation of construction activities. 2.9 Stabilize Exposed Areas. Permittee shall stabilize all exposed/disturbed areas within the project site to the greatest extent possible to reduce erosion potential, both during and following construction. Erosion control measures, such as, silt fences, straw hay bales, gravel or rock -lined ditches, water check bars, and broadcasted straw shall be used wherever silt -laden water has the potential to leave the work site and enter State waters. Erosion control measures shall be monitored during and after each storm event. Modifications, repairs and improvements to erosion control measures shall be made whenever they are needed. 2.10 Cease Project for Elevation of Turbidity Levels. Upon the Qualified Biologist, Biological Monitor or CDFW determination that turbidity/siltation levels resulting from project related activities constitute a threat to aquatic life, activities associated with the turbidity/siltation shall be halted until effective CDFW-approved control devices are installed or abatement procedures are initiated. CDFW may take enforcement action if appropriate turbidity and siltation control measures are not