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T'°,. F <br />LINOJLY� KES <br />To: Diane Hankee, Kelsey Gelhar <br />From: Andy Nelson <br />Date: January 18t", 2022 <br />Environmental Memo <br />Re: Environmental Comments/Rehbein black dirt pile <br />1. A trained individual with current certification in erosion and sediment control <br />must perform inspections at a minimum every 7 days and within 24 hours <br />after a rainfall event greater than '/2 inch in 24 hours. Inspection records must <br />be retained with the SWPPP and include information detailed in 11.11 of the <br />Construction Stormwater General Permit. Contact information for the <br />inspector must be provided to the city prior to any soil disturbance on the site. <br />2. Silt fence should be used instead of the sediment control logs shown on the <br />plan. A trench 1-2' deep on the stockpile side of the silt fence is <br />recommended to minimize maintenance of the silt fence. <br />Note that BMPs that become non-functional or'/2 full of sediment must be <br />repaired, replaced, or supplemented by the end of the next day after <br />discovery. <br />3. Street tracking generated must be swept within one calendar day of <br />discovery. <br />4. Water suppression, soil binding agents, wind blocks, or other dust <br />suppression methods may be required if dust leaving the site becomes an <br />issue as identified by the city. <br />5. Rock construction entrance will require regular maintenance. <br />6. Portions of the stockpile that are not in regular use should be stabilized with <br />seed and hyrdomulch. <br />0 Page 1 <br />