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C I T O F Environmental Memo <br /> INORK!;3E <br /> To: Diane Hankee, Kelsey Gelhar <br /> From: Andy Nelson <br /> Date: January 18th, 2022 <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 /> •Page 1 <br />