312 SE EVERETT MALL WAY 2018-01-02 MF Import

JUN 0,1987 HENDRANDUM — .".........__ CITY OF EVERETT Put:'ic Works Dept. lo: Nary Cunningham - City of Everett Planning Dept., FROM: Frank Scherf, Biologist - Water Resources U SUBJECT: Finley DNS (SEF'A #131-85) u L5 III DATE: May 27, I?B7 JUN 1 1987 �J Planning L:u t, Snohomish County has concerns over this proposal because ie directly affects the North Creel; stream system. This site lies directly adjacent to North Creel:: (within 151)fe-et) in the Lake Washinqton drainage basin. North Creek is "under- the gun" from heavy development pressure which ha_ had a significant impact upon water- quality. It is this issue of water quality that concerns us the most. The automotive center proposed for this 4.44 acre parcel will house a car wash, tune-up center, and oas station, in addition to the existing tire center. Pollutants originating from these type of businesses are phosphates, petroleum products (oil, gas. transmission fluid, grease) and antifreeze. It is unclear to us how these pollutants will be addressed, given a substantial stormwater runoff, and considering that 514% of site will be covered with impervious surface. Before- we can adequately evaluate environmental impacts, a detailed drainaoe plan must be evaluated. In the DNS, on site detention, a drainage Swale, an oil/water separator, and an east lying detention site is stated as a requirement. However, without that drainage plan several points remain unclear: 1) Will the on site detention be above or below ground? 2) Is there enough space on site for an above ground detention pond and drainage Swale? 3) How will the pollutants in the runoff be removed prior to entering North Creel:? 4) How will olycol based antifreeze and phosphate impurities be dealt with? 5) Will native wetland plants, Such as cattails and bulrush be used in the detention facilities. Will grass -lined drainage swales be used for bio-filtration of impurities? b) How will the detention facilities be maintained, by whom, and how often Snohomish County would like to review the detailed drainage plan, when available, so so that the above concerns can be adequately evaluated. Given the nature of the businesses and their proposed location, it would be difficult to assure that North Creeks water quality would not suffer. Also, the Dept. of Game and Dept. of Fisheries should be contacted, as I'm sure they have relevant concerns and recommendations. cc: Dept, of Fisheries (Kurt Buchanan), Dept. of Game (Ted NuIIe:-)