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BMP T5.13: Post Construction Soil Quality and Depth <br /> More than one method may be used on different portions of the same site. Soil that <br /> already meets the depth and organic matter quality standards, and is not com- <br /> pacted, does not need to be amended. <br /> Planning/Permitting/lnspectionNerification Guidelines & Procedures <br /> Local governments are encouraged to adopt guidelines and procedures similar to those <br /> recommended in Guidelines and Resources For Implementing Soil Quality and Depth <br /> BMP T5.13 in WDOE Stormwater Management Manual for Western Washington. This <br /> document is available at: http://www.soilsforsalmon.orq/pdf/Soil BMP Manual.pdf <br /> Maintenance <br /> . Establish soil quality and depth toward the end of construction and once estab- <br /> lished, protect from compaction, such as from large machinery use, and from <br /> erosion. <br /> • Plant vegetation and mulch the amended soil area after installation. <br /> • Leave plant debris or its equivalent on the soil surface to replenish organic matter. <br /> • Reduce and adjust, where possible, the use of irrigation, fertilizers, herbicides and <br /> pesticides, rather than continuing to implement formerly established practices. <br /> Runoff Model Representation <br /> Areas meeting the design guidelines may be entered into approved runoff models as <br /> "Pasture" rather than "Lawn." <br /> Flow reduction credits can be taken in runoff modeling when BMP T5.13: Post-Con- <br /> struction Soil Quality and Depth is used as part of a dispersion design under the con- <br /> ditions described in: <br /> . BMP T5.10B: Downspout Dispersion Systems (p.905) <br /> . BMP T5.11: Concentrated Flow Dispersion (p.905) <br /> . BMP T5.12: Sheet Flow Dispersion (p.908) <br /> • BMP T5.18: Reverse Slope Sidewalks (p.937) <br /> . BMP T5.30: Full Dispersion (p.939) (for public road projects) <br /> 2014 Stormwater Management Manual for Western Washington <br /> Volume V- Chapter 5-Page 913 <br />