3301 SEAWAY BLVD WHOLE SITE 2025-10-30

Ms. Sabrina Fandler City of Everett Public Works Department Engineering/Permit Services 015� August 9, 2016 Please see the second attachment for the criteria in the Planned Action Determination that haven't been met at this time. Of particular importance for this site is the construction management plan. I briefly reviewed the SWPPP that was included in the drainage report and it isn't adequate to address the conditions in the PAD, particularly with respect to implementing the recommendations in the geotechnical report and the provision of a construction phasing plan. It also includes an incorrect description of the proposed construction activities in Section 2.2. On this site, the stormwater detention pond is proposed to serve as the project's sediment control pond. However, requirement #18 prohibits exfiltration from the pond during all phases of construction. How and when will the pond be built and, in particular, lined to prevent exfiltration from the pond? How much clearing will be allowed before this critical facility is constructed? Will the site be cleared and graded all at once? How will the slopes of the pond be protected during clearing and grading? These and additional questions must be answered. Response: The SWPPP has been revised to include a construction sequence and sections revised to include additional construction information. iii. 1 have also reviewed the latest geotechnical report. It appears to me that the only things that were changed from the draft were the cover letter, the project description, and the Exploration Location Plan map, which shows an updated sight plan.. However, as last time, neither the project description nor the site plan accurately match the current site plan in the area of the pond... Given the coordination issues that naturally exist when the geotechnical engineer has to approve the final construction plans, I would highly recommend that the responsible geotechnical engineer be required to actually stamp and sign the construction plans for the detention pond and any pages that include pond -specific construction criteria. In fact, unless the responsible geotechnical engineer does sign the appropriate plans, I will not be willing to sign those plans myself. Response: The Geotech engineer has reviewed the current civil plans and has prepared a memo addressing their review of the plans and will continue to be involved in the project throughout construction. iv. Please also see below for more detailed comments on the plans and drainage report. And again, I am likely to have additional comments once more project -specific information has been provided on the plans and in the report. Response: Comment acknowledged. b. More specific plan/report comments (emailed to applicant on 7120116 and 7/21/16): i. The flow calculations for the internal bypass weir and the two 1.88" orifices of the MWS water quality device must also be included in the calculations and the MWS detail must show the height of the overflow weir. Response: The calculations for the weir and the two orifices are now included in the SSP. The overflow weir height is shown on the MWS details.