2320 RAILWAY AVE INTERWEST CONSTRUCTION INC 2023-06-12

0 0 O;L PUBLIC WORKS b. Please see all redlines on the attached plans for required corrections in addition to all comments listed below. Frequently, redlines will be stand-alone and will not have an associated item in this corrections letter. Likewise, comments below may not have associated redlines. Please indicate to the City that all redlines have been adequately addressed by providing checkmarks or notes next to the City's redlines to indicate that it has been picked up or to answer a reviewer's question. A comment response letter can also be included with your resubmittal to address the comments below (handwritten remarks under each comment on this letter are perfectly acceptable). The below listed sheets have redlines. i. Sheet T1.0 ii. Sheet C 1.0 iii. Sheet C 1.2 c. Remove all components that are not per this permit's scope of work. Any future elements will be reviewed on that phase's permit and will be approved through that permit. This permit is for early fill/grade/preload only and no business activity is permitted to be conducted through the approval of this permit. Keep the 35' right-of-way dedication shown on the plans for the entire length of frontage. Future elements have been removed -from the plan. Crushing equipment and. stockpiles remain as they are part of filling operations. The 35' right of way dedication has been extended along the entire east side of the parcel. d. A Construction Stormwater General Permit, administered by the Department of Ecology, will be required for this project since it will disturb an acre or more of land. Additional information as well as an application form can be found on the DOE website at: www.ecy.wa.gov/prograins/wq/stormwater/construction/ Please turn in a copy of the C- SWPPP submitted to Ecology and indicate your Ecology Permit Number. i. Although in the current state the runoff discharges to the sewer treatment plant, the ditch that conveys the water to the pump station could be classified by DOE as surface water and therefore coverage would be needed. Application for a Construction Stormwater General Permit will occur after SEPA DNS is obtained for the Interwest Site. e. Update the SWPPP per the redlines within the current document. Specifically, need to update the BMP selections per the redlined comments to select ones that satisfy the specific element. Only certain BMPs can satisfy each element. At least one BMP that satisfies each element must be selected for that particular element. i. See redlines on pages 13, 15, 16, and 17. Comments addressed. ii. Update included C1.0 in SWPPP once plan revisions have been made. C1.0 in the SWPPP reflects updated plan revisions. f.The Construction SWPPP should specifically address the possibility that groundwater may be contaminated from past activities at the site, and propose an appropriate disposal strategy should contamination be found. In the event of subsurface contamination of the soils, pollutants may be present that would not be removed with standard BMPs. In that case, the 2014 SWMMM indicates discharge to a sanitary or -combined sewer system, with the local authority's approval, is available — "if there is no other option". In this event, a Sewer Discharge Authorization Permit may be able to be obtained through the City's Maintenance Division (contact Brian Doolan at BDoolan@everettwa.gov or 425-257- 8828). The construction SWPPP has been revised to reflect the possiblilty of groundwater contamination and how to address this potential issue. g. Add notes to plans: All exposed ground must be reseeded within 30 days of the completion of construction. If reseeding is not practical due to weather or season problems, the ground must be covered with mulch as directed by the City Engineer. This note has been added to sheet C1.0. PsaP 7 of 7..