3726 BROADWAY BASE FILE 2018-01-02 MF Import

III. OFF-SiTE ANALYSIS The existing 2.15 acre site g�nerally sheet dra�n� to Broadway A�-enue and evcntuall�� discharges to the existing City combined sanitary sewer I storm system. All dramage viill be discharged to the existing 36" storri/sewer main w�thin 38'" Street. This drain turns northward within the ailey between Broadway and McDougatl Avenue and thEn eastward within 37" Str�et. IV. EROSION AND SEDIMENTATION CONTROL BMP'S Erosion Ccntrol BMP's shali consist of a rock construction entrance, sill fencmg, and soil stabilization measures. A sediment pond has also been added at the northeast corner oi the site with a filtered discharge to the existing storm drain within Broadway Avenue. . Refer to Section 6 for the required Small Parcel Erosion Control BMP's and sediment pond caiculations. For erosion and sediment control design refer to Appendix B - Civil Plans. V. RUNOFF CONTROL BMP'S The project requires compliance with the 1997 City of Everett Stormwater Management Manual. Stormwater will be discharge to the combined sanitary sewer/storm drain lines within Broadway and 38'h Street. According to discussions with lhe City of Everelt,storm detention and water quality measures will not be required due to the use of the exisling combined sewer/storm system. For the on-site storm drainage system refer to Appendix B- Civil Plans. On-site storm drains have been sized to accommodate a 25-year/ 24-hour storm event using the Rational Method. See attached calculations and exhibits. 3