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Ms. Rachel Juba <br />April 22, 2022 <br />Page 2 <br />Stormwater Management <br />6. The site is proposing to treat the new and reconstructed impervious for the expansion with a <br />biofiltration basin. Rate control and water quality requirements for the expansion are met <br />through this biofiltration basin. <br />7. Infiltration is not possible due to clay soils onsite and water reuse was not proposed due to <br />the minimal amount of treatment required. <br />8. The disturbance area should be noted on the plans to confirm whether a NPDES permit and <br />SWPPP will be required. It is assumed the site disturbance is under one acre and does not <br />require a SWPPP or NPDES permit. <br />9. Comments on the drainage design have been provided to applicant and will need to be <br />addressed in future submittals for documentation and permitting purposes. <br />Wetland <br />10. There are two (2) wetlands within the site. <br />11. Wetland 2, the easternmost wetland is proposed to be impacted by the construction of the <br />school addition. <br />12. The total amount of impact for this project to wetland 2 is 0.2435 acres. <br />13. The applicant has proposed to replace impacts using wetland bank 1722 with 0.4870 acres of <br />wetland credit. <br />14. The application is complete and a draft notice of decision approving the replacement and <br />wetland sequencing has been completed. A memo to city council recommending approval <br />has been drafted and will be provided to council for approval at the next meeting. <br />Thank you for the opportunity to provide comments on this project. Additional comments may be <br />necessary following the review of the responses to these. If you have any questions, please do <br />not hesitate to contact me at 612-419-3589. <br />Sincerely, <br />WSB <br />Nick Guilli ms, PE <br />Senior Project Manager <br />cc: Scott Anderson, Public Works Director (email only) <br />Liz Finnegan, Senior Engineering Technician (email only) <br />