8525 EVERGREEN WAY BURGER KING 2021-05-10

{ Bioretention and splash blocks are no longer proposed. See new plan set. ■ The underdrains shown in the plan view do not appear to tie into the stormwater conveyance system. Please resolve. Bioretention is no longer proposed. See new plan set. • Bioretention Planter Detail: • Per above comment, Section 4-4.1 (3) SETBACKS of the DCSS requires a 10-ft setback from the open water maximum surface elevation or edge of a stormwater facility to property lines and on- site structures. Please revise the designs to meet this requirement. • Add energy dissipation in the bioretention cells at curb locations. • Bioretention liner is called out but no details are provided regarding the extent of installation. • Specify on this drawing whether the liner should cover both sides and the bottom of the bioretention facility or just one side (and which side if so). • Update BMP sizing and designs as needed: o If infiltration through the sides of the cells was credited in WWHM, that needs to be zeroes out in the model due to the liner on the sides. o If the liner is intended to wrap around the bottom, no infiltration credit may be taken. Bioretention is no longer proposed. See new plan set • Curb Port Detail for Dispersion: • This detail appears conflicting with the Bioretention Plater Detail. Please delete the Curb Port Detail if it is not intended to be used, or call out where it is intended to be used in the plan view on this sheet. Bioretention is no longer proposed. See new plan set o Sheet 4—Stormwater Pollution Prevention Plan • Provide notes to cover Downspout Infiltration Trench BMPs. Infiltration Trenches are no longer proposed. o Sheet 5 —Paving Plan/Bioretention Area Basin Map • Paving Plan: PO Box 1478 • Everett, WA 98206 • Phone: (425) 303-9363 Fax: (425)303-9362 • Email:info@insightengineering.net