Loading...
HomeMy WebLinkAboutSEP2018-00007 - SEP Determinations - 2/16/2018 yoN..STgT�o� MASON COUNTY �P C Department of Community Services o s° y= Planning Division y N T 615 W Alder St, Shelton, WA 98584 �0 Y o~ (360)427-9670 1864 DETERMINATION OF NONSIGNIFICANCE (WAC 197-11-340) SEP2018-00007 Description of Proposal: INSTALL WASTE CHUTE, RE-PAVE TIPPING FLOOR AND ROADS, IMPROVE DRAINAGE SYSTEM AND EXTERIOR STAIRS Proponent: MASON COUNTY PUBLIC WORK Location of Proposal: 501 W EELLS HILL RD SHELTON Parcel Number: 420044060000 Legal Description: N1/2 SE & N 100 ACRES OF SW Directions to Site: DAYTON AIRPORT RD, R ON EELLS HILL RD TO TRANSFER STATION Lead Agency: Mason County The Lead Agency for this proposal has determined that it does not have a probable significant adverse impact on the environment. An Environmental Impact Statement (EIS) is not required under RCW 43.21 C.030(2)(c). This decision was made after review of a completed Environmental Checklist and other information on file with the Lead Agency. This information is available to the public upon request. Please contact Kell Rowen at ext. 365 with any questions. This DNS is issued under WAC 197-11-340(2). The Lead Agency will not act on this proposal for 14 days from the date shown below, when the determination is final. Comments must be submitted to Dept. of Community Development, 615 W Alder St, Shelton WA 98584 by 3/2/2018. Appeal of this determination must be filed within a 14-day period following this final determination date, per Mason County Code Chapter 15.11 Appeals. � p 24 u,l rg Authorized Local Government Official Date i sT��F �r r O YHL IN89 STATE OF WASH INGTON DEPARTMENT OF ECOLOGY PO Box 47775 •Olympia, Washington 98504-7775 •(360)407-6300 711 for Washington Relay Service •Persons with a speech disability can call 877-833-6341 March 2, 2018 Mr. Kell Rowen Mason County Department of Community Development Planning Division PO Box 279 Shelton, WA 98584 Dear Mr. Rowen: Thank you for the opportunity to comment on the mitigated determination of nonsignifi ance for the Eells Hill Transfer Station Improvements Project(SEP2018-00007) located at 501 West Ealls Hill Road in Shelton as proposed by Mason County Public Works. The Department of cology (Ecology)reviewed the environmental checklist and has the following comment(s): WATER QUALITY: Gary Lee(360)407-6291 A State Waste Discharge Permit(SWDP) is required for d' charging industrial wast iwater from the facility to the publically owned treatment works OTW). The applicant should contact Ecology's Southwest Regional Office (SWRO)Water Quality Program(WQ)to initiate the SWDP application process. Ecology's comments are based upon information provided by the lead agency. As such;they may not constitute an exhaustive list of the various authorizations that must be obtained or legal requirements that must be fulfilled in order to carry out the pri osed action. If you have any questions or would like to respond to these coniments,please contact th appropriate reviewing staff listed above. Department of Ecology Southwest Regional Office (MLD:201800811) cc: Gary Lee, WQ Barb Stepp, Mason County Public Works (Applicant Coni tc t) t8 coo, A. Background hf elpl • 1. Name of proposed project, if applicable: 1hel Eells Hill Transfer Station Improvements 2. Name of applicant: h[ elpl Mason County Public Works 3. Address and phone number of applicant and contact person: hf gjpl Mason County Public Works 100 W. Public Works Drive Shelton, WA 98584 Attn: Bart Stepp, PE, Deputy Director/Utilities &Waste Management (360) 427-9670 x652 4. Date checklist prepared: hf elpl 12/21/17 5. Agency requesting checklist: hf e Mason County 6. Proposed timing or schedule (including phasing, if applicable): hel December 2017—Submit SEPA and grading permit application to Mason County Community Development for approval • January 2018— Open contractor bids for project February 2018—Award contract to Contractor, SEPA and grading permit approval March 2018— Contractor begins construction June 2018—Construction is complete 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. hf e This proposal is for improvements at the Eells Hill Transfer Station. Other improvements at the station will be permitted under a different application. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. hI e No environmental reports specific to this project have been created. The existing site includes a closed landfill. Groundwater and leachate gas monitoring have been ongoing on the site for over 20 years around the landfill. The proposed project will not impact the landfill or the monitoring that will continue. The monitoring'to date has not indicated any groundwater contamination from the landfill. 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. hI elpl No SEPA Environmental checklist(WAC 197-11-960) July 2016 Page 2 of 13 10. List any government approvals or permits that will be needed for your proposal, if known. hf elpl • A grading permit is needed through Mason County due to the amount of excavation for a new stormwater pond. This project does not require approval from state or federal agencies. All of the project funding is from County funds. Project size does not require a construction stormwater permit from Ecology 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.) h( e The project proposal consists of improvements to the Eells Hill Transfer Station. Facility improvements include: replacement of the tipping floor surfacing, installation of a steel load- out chute and associated modifications to the load-out tunnel, installation of an exterior metal staircase, repair of the rail for the tamping crane platform, and replacement of infrastructure for the sanitary sewer and storm water utility systems including piping, catch basins, cleanouts, a holding tank, and an infiltration pond. 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you • are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. hel The Eells Hill Transfer Station is located at 501 W Eells Hill Road, Shelton, WA 98584. This is located at Township 20 N, Range 4 W, in the SE '/4 of Section 20'. B. ENVIRONMENTAL ELEMENTS hf elpl 1. Earth hf elpl a. General description of the site: hf elpl (circle one): Flat, rolling, hilly, steep slopes, mountainous, other b. What is the steepest slope on the site (approximate percent slo e)? 1hel 20 c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any agricultural land of long-term commercial significance and whether the proposal results in removing any of these soils. hf ep The soil is generally a sand and gravel mix. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. hf elpl No SEPA Environmental checklist(WAC 197-11-960) July 2016 Page 3 of 13 • e. Describe the purpose, type, total area, and approximate quantities and total affected area of any filling, excavation, and grading proposed. Indicate source of fill. hf elpl Approximately 3,000 cubic yards will be excavated to create a stormwater pond near the transfer station building. The soil excavated will be deposited at another location on the property that has been previously excavated. No soil will be removed from the property. Construction debris (old asphalt, concrete, etc.)will be disposed of with regular solid waste. No fill will be imported on to the site. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. hLLeM Erosion could occur in the new stormwater pond area prior to establishment of the hydroseed on the soil. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? hf e The site already contains existing buildings and roads. The size of the buildings and roads will not change although some will be improved. The area of the new storm pond is undeveloped ground so pervious percentages will not change as a result of this project. The creation of the stormwater pond and new drainage system will improve infiltration of stormwater runoff on the site. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: hf elpl Contractor will employ best management practices as required in WSDOT specifications to prevent erosion until project is complete and all ground is stabilized. • 2. Air 1hel a. What types of emissions to the air would result from the proposal during construction, operation, and maintenance when the project is completed? If any, generally describe and give approximate quantities if known. hf gM During construction their will be construction vehicles like excavators and dump trucks that will emit typical construction equipment emissions. The completed project will not change how the transfer station is operated so emissions during normal operations will not change once the project is complete. b. Are there any off-site sources of emissions or odor that may aOect your proposal? If so, generally describe. hf elpl No c. Proposed measures to reduce or control emissions or other im acts to air, if any: hf gM All construction vehicles used will meet state emission requirements as applicable for that equipment. 3. Water h a. Surface Water: 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. h� elpl No • SEPA Environmental checklist(WAC 197-11-960) July 2016 Page 4 of 13 2)Will the project require any work over, in, or adjacent to (within 200 feet)the described waters? If yes, please describe and attach available plans. hI e • No 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. hf e Zero 4)Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. hel No 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan. hLeM No 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. 1hel No b. Ground Water: 1)Will groundwater be withdrawn from a well for drinking water or other purposes? If so, give a general description of the well, proposed uses and approximate quantities • withdrawn from the well. Will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known. [hel The transfer station already has an existing well on-site for potable uses. The project will not result in any changes to the water system. The completed project will not alter use of the well. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any(for example: Domestic sewage; industrial, containing the following chemicals. . . ; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. hf elpl The transfer station includes an existing septic system that serves the bathroom in the office. The proposed project does not alter the existing or future use of this system. c. Water runoff(including stormwater): 1) Describe the source of runoff(including storm water) and method of collection and disposal, if any(include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. hf elpl The existing transfer station is graded so runoff does not leave the transfer station building area. All of the runoff on-site infiltrates at the low points of the property. The runoff going to the stormwater pond in this project will infiltrate. No runoff will leave the . site. SEPA Environmental checklist(WAC 197-11-960) July 2016 Page 5 of 13 • 2) Could waste materials enter ground or surface waters? If so, generally describe. hel The project includes a separate system for the collection of leachate into vaults. The vaults will be pumped out as needed and the waste disposed of at wastewater treatment facilities. The stormwater runoff will be separated from this system and infiltrate in the pond. 3) Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If so, describe. No d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any: hj e The improved stormwater system and separate leachate collection system will improve stormwater management around the transfer station building. This will reduce the amount of standing water that exists on-site during the winter and improve the sanitation of the site. 4. Plants hf e a. Check the types of vegetation found on the site: hel _deciduous tree: alder, maple, aspen, other x evergreen tree: fir, cedar, pine, other • x shrubs x grass _pasture _crop or grain Orchards, vineyards or other permanent crops. wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other _water plants: water lily, eelgrass, milfoil, other x other types of vegetation b. What kind and amount of vegetation will be removed or altered? hf elpl The area of the new stormwater pond is primarily weeds, scotch broom, and blackberries. c. List threatened and endangered species known to be on or near the site. hf g! Unknown d. Proposed landscaping, use of Native plants, or other measures to preserve or enhance vegetation on the site, if any: hel The new stormwater pond will by hydroseeded to stabilize slopes and provide treatment of the stormwater runoff. e. List all noxious weeds and invasive species known to be on or near the site. hf elpl Scotch Broom and Blackberries SEPA Environmental checklist(WAC 197-11-960) July 2016 Page 6 of 13 5. Animals hf elpl • a. List any birds and other animals which have been observed on or near the site or are known to be on or near the site. hel Examples include: birds: hawk, heron, eagle, songbirds, other: Crows, Seagulls mammals: deer, bear, elk, beaver, other: Coyotes, Rats fish: bass, salmon, trout, herring, shellfish, other b. List any threatened and endangered species known to be on or near the site. hI elM Unknown c. Is the site part of a migration route? If so, explain. 1LpjPJ The County is part of the Pacific Flyway. d. Proposed measures to preserve or enhance wildlife, if any: hf e None e. List any invasive animal species known to be on or near the site. 1hel Rats (due to solid waste on-site) 6. Energy and Natural Resources lbpjpj a. What kinds of energy(electric, natural gas, oil, wood stove, solar)will be used to meet the completed project's energy needs? Describe whether it will be used for heating, • manufacturing, etc. h� e The transfer station uses electricity to power the Grizzly Crane and lights in the transfer station building. Internal combustion vehicles are used to traverse the roads at the transfer station building. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. hI e No c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: hI jpj None. This project will improve operations of the facility which could lead to reduced use of vehicles like the loader or Grizzly Crane. 7. Environmental Health h( e a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. hf e No. This project does not make any changes to transfer station operations that would alter the existing potential exposures at the transfer station from unknown solid waste entering the site. SEPA Environmental checklist(WAC 197-11-960) July 2016 Page 7 of 13 1) Describe any known or possible contamination at the site from present or past uses. hf elpl The site includes an old County landfill that has been closed for over 25 years. Since it has been closed the County has regularly monitored groundwater and leachate gas for contamination from the landfill. No contamination has been found to date. 2) Describe existing hazardous chemicals/conditions that might affect project development and design. This includes underground hazardous liquid and gas transmission pipelines located within the project area and in the vicinity. hf elpl Within the proposed construction area, there are no hazardous gas transmission pipelines or hazardous facilities. 3) Describe any toxic or hazardous chemicals that might be stored, used, or produced during the project's development or construction, or at any time during the operating life of the project. hf elpl Household hazardous waste is stored at the Eells Hill HHW shed. This is on the same parcel as the proposed project, but the proposed project does not impact the HHW shed. Operations of the HHW facility will not change as a result of this project. 4) Describe special emergency services that might be requirted. hf elpl None 5) Proposed measures to reduce or control environmental health hazards, if any: h� e Currently at the transfer station when solid waste is dumped into the container some of it • will fall over the side of the container, requiring staff to use a loader to clean out the bay chute from time to time. This project includes installing a new waste chute that will surround the top of the transfer container. This will reduce or eliminate solid waste from going over the side which is a food source for the invasive animals on-site (rats, crows, and seagulls). Eliminating the food source will reduce this invasive population and help keep the facility cleaner. The propose project also improves the leachate collection system and separates it from the stormwater runoff system. This will allow clean stormwater to infiltrate and allow the County to pump leachate from vaults and dispose of that at wastewater treatment plants for proper treatment. b. Noise h( e 1)What types of noise exist in the area which may affect your project(for example: traffic, equipment, operation, other)? hf e None 2)What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indi- cate what hours noise would come from the site. 1hel Typical construction noise would occur on-site. The County already uses semi-trucks, excavators, and a loader on-site for operation so the project noise would be very similar to existing operations. Since the Contractor will be allowed to deposit all excavated material on-site and construction debris will be disposed of with the rest of the solid waste, this project will not create a significant increase in truck traffic on Eells Hill Road. SEPA Environmental checklist(WAC 197-11-960) July 2016 Page 8 of 13 3) Proposed measures to reduce or control noise impacts, if any: h( elpl The Contractor allowable hours are 10 hours between 7 AM —8 PM. In order to complete • the project and maintain service during the week the Contractor will be allowed to work on the weekends. 8. Land and Shoreline Use hf e a. What is the current use of the site and adjacent properties? Will the proposal affect current land uses on nearby or adjacent properties? If so, describe. h The current use of the site is as a transfer station for the County. The property to the north is the Ridge Motorsports Park. The property to the west is undeveloped land owned by the County. Properties to the east and south are undeveloped or tree farms. This project will not affect current properties during construction or after completion. b. Has the project site been used as working farmlands or working;forest lands? If so, describe. How much agricultural or forest land of long-term commercial significance will be converted to other uses as a result of the proposal, if any? If resource lands have not been designated, how many acres in farmland or forest land tax status will be converted to nonfarm or nonforest use? hI elpl No 1)Will the proposal affect or be affected by surrounding working farm or forest land normal business operations, such as oversize equipment access, the application of pesticides, tilling, and harvesting? If so, how: hf elpl No • c. Describe any structures on the site. h Current structures on-site include the transfer station building, operator building, attendant booth, office/garage, and HHW shed/storage building. d. Will any structures be demolished? If so, what? hf jpj No e. What is the current zoning classification of the site? hf e 7f. Wh m rehensive plan designation of the site? hel Rural Residential 20 Acres g. If applicable, what is the current shoreline master program designation of the site? hel NOT APPLICABLE, project is not within a shoreline area. h. Has any part of the site been classified as a critical area by the city or county? If so, specify. hl elpl No i. Approximately how many people would reside or work in the completed project? hf jP] 5—6 employees work at the Transfer Station when it is open. No one resides at the transfer station. SEPA Environmental checklist(WAC 197-11-960) July 2016 Page 9 of 13 j. Approximately how many people would the completed project displace? hL Zero k. Proposed measures to avoid or reduce displacement impacts, if any: hel None needed L. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: h( e Project does not change existing use so the proposal is compatible with existing land uses. m. Proposed measures to reduce or control impacts to agricultural and forest lands of long-term commercial significance, if any: hf jpJ Project will not impact agricultural or forest lands so no measures are required. 9. Housing hf e a. Approximately how many units would be provided, if any? Indicate whether high, mid- dle, or low-income housing. h[ e Zero b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. hf gM Zero • c. Proposed measures to reduce or control housing impacts, if any: 1hel None needed 10. Aesthetics hf elpl a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? hf e The transfer station building has a height of about 50' from the bottom of the waste chute to the top of the roof. The principal exterior building material is corrugated metal. The proposed project does not change the height of the structure or the exterior material. b. What views in the immediate vicinity would be altered or obstructed? hf elpl No views would be altered as this project does not alter the building height or construction. b. Proposed measures to reduce or control aesthetic impacts, if any: hI elpl None. The completed project will improve drainage and reduce the amount of solid waste spillage so overall cleanliness of the site should improve. 11. Light and Glare h� e a. What type of light or glare will the proposal produce? What time of day would it mainly • occur? hf elpl None as lighting improvements are not a part of this project. SEPA Environmental checklist(WAC 197-11-960) July 2016 Page 10 of 13 • b. Could light or glare from the finished project be a safety hazard or interfere with views? hf jpJ No c. What existing off-site sources of light or glare may affect your proposal? h( elpl None d. Proposed measures to reduce or control light and glare impacts, if any: hf elpl None 12. Recreation hf�] a. What designated and informal recreational opportunities are in the immediate vicinity? hf e The property to the north on the other side of Eells Hill Road is a private motorsports park with race tracks. b. Would the proposed project displace any existing recreational uses? If so, describe. hf jPJ No c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: h( e10 None proposed 13. Historic and cultural preservation hf elpl • a. Are there any buildings, structures, or sites, located on or near the site that are over 45 years old listed in or eligible for listing in national, state, or local preservation registers ? If so, specifically describe. h1�1 No b. Are there any landmarks, features, or other evidence of Indian or historic use or occupation? This may include human burials or old cemeteries. Are there any material evidence, artifacts, or areas of cultural importance on or near the site? Please list any professional studies conducted at the site to identify such resources. h No c. Describe the methods used to assess the potential impacts to cultural and historic resources on or near the project site. Examples include consultation with tribes and the department of archeology and historic preservation, archaeological surveys, historic maps, GIS data, etc. h( el The existing site has been used as a transfer station for and/or landfill for over 50 years. Various parts of the parcel have been excavated and built on but no cultural resources have been found. d. Proposed measures to avoid, minimize, or compensate for loss, changes to, and disturbance to resources. Please include plans for the above and any permits that may be required. hf e Contractor will be required to notify County if resources are found during construction. No cultural resource permits are required. • SEPA Environmental checklist(WAC 197-11-960) July 2016 Page 11 of 13 14. Transportation hf e • a. Identify public streets and highways serving the site or affected geographic area and describe proposed access to the existing street system. Show on site plans, if any. hf e The transfer station is located off of Eells Hill Road. The proposed project does not alter the existing access or propose a new access. b. Is the site or affected geographic area currently served by public transit? If so, generally describe. If not, what is the approximate distance to the nearest transit stop? hel The site is not served by public transit. The nearest bus stop is several miles away on HWY 101. c. How many additional parking spaces would the completed project or non-project proposal have? How many would the project or proposal eliminate? hLelp1 This proposal would not create or destroy any parking spaces. d. Will the proposal require any new or improvements to existing roads, streets, pedestrian, bicycle or state transportation facilities, not including driveways',? If so, generally describe (indicate whether public or private). hf elpl The proposal would not require any improvements to transportation facilities. e. Will the project or proposal use (or occur in the immediate vicinity of)water, rail, or air transportation? If so, generally describe. hf e The solid waste containers that are filled at Eells Hill are shipped to Centralia where they are put on a train and shipped by rail to the Roosevelt Landfill in Klickitat County. The • proposed project does not alter the existing transportation route of these containers. f. How many vehicular trips per day would be generated by the completed project or proposal? If known, indicate when peak volumes would occur and what percentage of the volume would be trucks (such as commercial and nonpassenger vehicles). What data or transportation models were used to make these estimates? hf e The project does not alter transfer station operations so it will not increase or decrease the amount of vehicular trips per day. g. Will the proposal interfere with, affect or be affected by the movement of agricultural and forest products on roads or streets in the area? If so, generally describe. h( elpl No h. Proposed measures to reduce or control transportation impacts,if any: h( e None needed. 15. Public Services hf e a. Would the project result in an increased need for public services (for example: fire protection, police protection, public transit, health care, schools, other)? If so, generally describe. hf jpj No b. Proposed measures to reduce or control direct impacts on public services, if any. hf elpl • None needed SEPA Environmental checklist(WAC 197-11-960) July 2016 Page 12 of 13 16. Utilities hf eipl • a. Circle utilities currently available at the site: het electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other_ b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. hf elpl The proposed project does not alter any existing utilities. The proposed project does include a leachate collection system going into vaults. These vaults will be pumped out when full and the leachate taken to a wastewater treatment plant for disposal. C. Signature h( M The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. Signature: Name of signee Bart Stepp Position and Agency/Organization Deputy Director/Utilities and;Waste Management for Mason County Public Works Date Submitted: 12/21/17 • SEPA Environmental checklist(WAC 197-11-960) July 2016 Page 13 of 13 , MASON COUNTY DEPARTMENT OF PUBLIC WORKS 100 W PUBLIC WORKS DRIVE SHELTON, WASHINGTON 98584 Phone(360)427-9670 ext.450 Fax(360)427-7783 March 2, 2018 MASON COUNTY MISSION Tricia Woolett TO BE KEPT IN THE The mission of Mason Building Inspector II PARCEL FILE County Government is to Mason County Community Development provide essential& 615 W Alder Street mandated services which will preserve&benefit the Shelton,WA 98584 health,safety&welfare of the general public in a professional and courteous Subject: EELLS HILL TRANSFER STATION IMPROVEMENTS STORMWATER MEMO manner through the effective and equitable management of available public Dear Ms.Woolett, resources. This memo explains the need and purpose of the stormwater improvements that is Mason County recognizes part of the Eells Hill Transfer Station Improvements Project. that its employees& volunteers are the foundation upon which The transfer station building was built in 1993. I have copies of the design drawings these services are provided. but no information on whether a stormwater report was completed at that time. The original stormwater system consisted of catch basins that discharged into perforated pipe that was buried in the ground to the west of the building by gravity. At some point that perforated pipe became clogged. The County then put sump pumps in the catch basins and ran pipe over the ground that discharged to an infiltration ditch to the west of the building in the same area as the perforated pipe. Then those pumps failed and now the runoff pools and stagnates near the building and on top of the access roads until it infiltrates Or evaporates. County staff have to walk through these puddles at times to access equipment and complete tasks. The proposed improvements would replace the existing catch basins with new ones and run new drain pipe by gravity to an expanded and deeper stormwater infiltration pond/trench west of the building. The project does not increase impervious area so the stormwater runoff amount is still the same as the original construction. The runoff will still be directed to the same area as the original perforated pipe design, but the improvements will eliminate existing ponding issues and create a storm system that is easier to maintain. This will improve staff safety and eliminate sanitary issues caused by standing water. You can contact me at 360-427-9670 x652 or.bstepp@co.mason.wa.us if you would like to discuss this. Sincerely, Bart Stepp, PE Deputy Director/Utilities and Waste Management c. Loretta Swanson, Mason County Public Works