7301 EVERGREEN WAY EVERETT CHEVROLET 2017-03-01

• 0111 �3 PUBLIC WORKS c57.77 . . ... —, ; ..— fT March 10, 1999 Jay Daily, Service Manager Chevrolet of Everett 7300 Evergreen Way Everett, WA 98203 Dear Mr. Daily; On March 5, 1999, I visited your site, along with Mike Papa, to help you find a solution for appropriately managing waste water from car washing on your site. When your site was constructed in 196$.records were not generally kept for storm drainage installations. Therefore, our intent was to investigate your storm drainage system and to determine if the system lent itself to a relatively simple solution for allowing car-washing activities on site. During the course of our investigation,we determined that at least one catch basin on your site is connected to the sanitary sewer. This catch basin is located near the middle of your main building and collects runoff from a significant amount of pavement and roof area(please see the attached site map). We determined the discharge point of the outlet pipe from this catch basin by placing tracing dye into the basin and flushing the dye through with a bucket of water. The dye was evident in the sanitary sewer at the sewer manhole shown in the enclosed site plan. There are at least four other catch basins on the main site with an undetermined discharge location. We did not dye test these basins due to a lack of a convenient source of water or because they were unavailable under parked cars. However, in our experience, if one catch basin on a site is connected to the sanitary sewer,others usually are too. We will conduct additional investigation as soon as possible in order to determine the connection points of all the catch basins on your site. Unfortunately,even though it appears that the majority of wash water generated by car washing on your site is already going to the sanitary sewer, as required by City ordinance, so is runoff generated by rainfall. The entry of stormwater runoff into the sanitary sewer system overtaxes both the conveyance system and the City's water pollution control facility and is disallowed by City ordinance. Therefore. the City will require that the site's stormwater discharges to the sanitary sewer be eliminated by October 1, 1999. You had mentioned during our visit that the dealership might be remodeled in the near future. Depending upon the extent of the planned remodel, other City ordinances may require"retrofitting"of the storm drainage system to address runoff control, including provisions for washing cars on the site and appropriate discharge of the waste water. Therefore. elimination of the stormwater discharges to the sanitary sewer system would be a logical component of the remodel work, if your schedule will allow combining these items. In addition, regulatory changes at the state level may give the City less flexibility in working with redevelopment projects by early next year.so I would encourage you to take advantage of current regulations by moving forward with 4ny remodeling project as soon as possible. For the time being.cars can be washed anywhere on the site that drains to the catch basin that discharges to the sanitary sewer(see attached map). If the catch basin to the west of the tested basin also discharges to the sanitary sewer(which would be logical given its location, but couldn't be determined during the site visit),then almost all of the area south of the main building would be available(temporarily) for washing cars. However,runoff from that portion of the site fronting and sloping towards Evergreen Way • CITY OF EVERETT • 3200 Cedar Street • Everett, WA 98201 • (425) 257-8800 • Fax (425) 257-8882 '/Z)° . /