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2017-03-07-minutes-solid-waste
KITTITAS COUNTY COMMISSIONERS Solid Waste, Maintenance and Fair Office Study Session Regular Meeting Tuesday February 14, 2017 - 2:00 PM BOCC Conference Room 205 West 5th Room 108 - Ellensburg 1. Call to Order 2. Study Session was held per Code but inconsistent with publishing dates. Study Session will be re -held 3/14/2017. 3. Other business 4. Adjourn Created on 2/15/2017 2:11:25 PM KITTITAS COUNTY COMMISSIONERS Solid Waste, Maintenance, and Fair Office Study Session Regular Meeting Tuesday March 7, 2017 - 2:00 PM BOCC Conference Room 205 West 5th Room 108 - Ellensburg 1. Call to Order 2. Solid Waste Updates 3. Discussion on Kittitas County Transfer Station Basis of Design Report 4. Maintenance and Project Updates 5. KVEC - Updates 6. Discussion on Bowling Alley Contents and Proposal Review 7. Other business 8. Adjourn Created on 2/10/2017 1:11:17 PM COMMISSIONERS' MINUTES KITTITAS COUNTY, WASHINGTON BOCC CONFERENCE ROOM REGULAR MEETING Tuesday 2:00 PM February 14, 2017 Board members present: Laura Osiadacz, Obie O'Brien, Paul Jewell Others: Patti Johnson, Lisa Lawrence, Lisa Young (2:05 p.m. - 2:10 p.m.), Kay Kresge REGULAR MEETING COMMISSIONERS Note: Study Session was held per Code but inconsistent with publishing dates. Study Session will be re -held 3/14/2017. Meeting called to order at 2:05 p.m. At 2:05 p.m. Commissioner Jewell announced the Board would recess into Executive Session for 5 minutes to evaluate the qualifications of an applicant for public employment or to review the performance of a public employee. However, subject to RCW 42.30.140 (4), discussion by a governing body of salaries, wages, and other conditions of employment to be generally applied within the agency shall occur in a meeting open to the public, and when a governing body elects to take final action hiring, setting the salary of an individual employee or class of employees, or discharging or disciplining an employee, that action shall be taken in a meeting open to the public. No action was anticipated. At 2:10 p.m. the Board reconvened from Executive Session and no action was taken. Solid Waste Updates: None Discussion on Kittitas County Transfer Station Basis of Design Report: Patti Johnson presented the Board with the Design report for their review and discussion at a later agenda. Maintenance and Project Updates: A brief discussion was held on current staffing coverage and keeping up with snow removal. Patti presented the Board with the Bloom Pavilion Addition Plans from ALSO. Discussion was held on the plans presented including the animal wash racks design and the proper drainage and containment of them. Further discussion was held on the vision for the buildings such as color concept, meeting energy codes or a variance thereof and looking into the electrical service to the building. Patti informed the Board that the project is on hold until the snow melts since the next step is a Survey for construction. KVEC Updates: Lisa Lawrence informed the Board she met with the IT Committee regarding the Fair board wanting an Instagram Account and further informed them that the -committee tabled the discussion since they had no recommendation for the Board yet and that they would most likely see this on a future agenda. Lisa L. informed the Board that Spirit of the West is this week end and staff has been busy with snow removal and preparation for the event. Discussion was held on various inquires for different types of motorized events in the Rodeo Arena including the possibility for in kind services in lieu of rental fees and that Lisa L. would further investigate the extent of the inquiry. Discussion on Bowling Alley Contents and Proposal Review: Lisa L. informed the Board that Bill Hamilton had contacted her and was interested in some of the equipment inside the Bowling Alley. A brief discussion was held on following up with another offer prior to pursuing his interest. Meeting adjourned @ 2:55 p.m. KITTITAS COUNTY COMMISSIONERS KITTITAS COUNTY, WASHINGTON Lisa Lawrence Chairman Action Item Project No.: 2016-075 Liberty Bldg., Suite 400 Kittitas County Gregg Schlanger 203 North Washington Project Name: Kittitas Valley Event Center Spokane, WA 99201-0233 4-H Leader/ User Bloom Pavilion Addition 509.838.8568 Jeff Warner ALSC Architects tax/509.458.3710 Subject: Meeting Minutes www.alscarchitects.eorn February 13, 2017 By: Jeff Warner Those Present Representing Patti Johnson Kittitas County Gregg Schlanger CWU Julie Sorensen WSU Extension / 4-H Mark Crowley 4-H Leader/ User Becky McDowell Fair Board / Friends of the Fair Jeff Warner ALSC Architects This report is not intended to provide a transcript of proceedings, but rather to record the general content of the discussion that took place. Action Item I. Code Requirements: A. If the addition is closer than 22 ft. from the Cattle Barn, the east wall must be one- hour fire rated construction. It was agreed to allow 6 ft. minimum clear between the addition and the Cattle Barn with a solid concrete east wall. The addition will also be required to have a fire sprinklers like the main Bloom Pavilion. II. Plan Comments: A. Existing doors on the east wall of the Pavilion are fine as is. B. The new 8 ft. wide by 10 ft. high door from the Pavilion to the addition should be as far as north as possible. C. The south end of the addition should be open. A 12 ft. wall with an exit door will be provided on the east side of the opening. This will allow about a 26 ft. clear opening. D. Two 8 ft. wide by 10 ft. high overhead doors are required in the east wall of the addition. These doors should align with the existing openings in the Cattle Barn. E. The north door into the addition should be 12 ft. wide, the same height as the Pavilion door and centered in the north wall. F. The north exit door should be as close to the north wall as possible. G. The committee would like sky lights in the roof of the addition. III. Civil Items: A. The topographic survey will be performed as soon as the current snow coverage melts. B. The Fire Department is requiring a new fire hydrant near Fifth and Poplar Street. 2016-075 Kittitas Valley Event Center -Bloom Pavilion MM 2017-02-13 1 ALSC Architects I We bring our clients' stories to life. Action Item IV. Mechanical Items: A. If heat is added to the Bloom Pavilion, the energy code will require that insulation is added. Patti will check with the city to see if they will grant an exemption to the insulation requirement if the heat is only enough to maintain a 40° space. B. Ventilation: 1. The existing roof -mounted exhaust fan is very noisy and must be turned off during events that use the PA System. 2. The engineer has proposed two roof fans with low sidewall intake louvers for ventilation. V. Structural: A. The roof of the addition can be self-supporting or possibly attached to the pavilion structure. Attaching to the pavilion structure eliminates the need for a row of columns along the pavilion wall. B. Patti will look for information on the existing pavilion's structure that is needed to evaluate the feasibility of using the existing structure to support the addition. Information needed is the steel frame design, tilt -up concrete panel design, and footing and foundation design. VI. Electrical: A. It was noted that the pavilion needs an upgraded electrical service. Multiple fans running in the space frequently causes the breakers to trip. ALSC B. ALSC will have the electrical engineer evaluate the existing electrical service to determine what is needed to correct the situation. C. LED lights are the preferred lighting source for the addition. VII. Wash Racks: A. Swine: 12 stations 3 ft. wide by 4 ft. deep are needed with a hose bib 5 ft. above the slab at each station. B. Cattle: 6 stations 6 ft. wide by 8 ft. deep are needed with a hose bib 5 ft. above the slab at each station. C. Horse: 6 — 12, 6 ft. wide by 8 ft. deep stations are needed with a hose bib 5 ft. above the slab at each station. The rack should be as large as possible between the east door to the Draft Horse Barn and the Drive Lane to the south. It should have roof with a minimum clearance of 8 ft. and solid sides to reduce wind. D. Wash racks should be paved with concrete. They will be covered with rubber mats. E. No dividers are required between wash rack stations. VIII. The City of Ellensburg will be responsible for plan review and permits for this project. IX. The next meeting will be scheduled after the survey is complete. This may three — six weeks. 2016-075 Kittitas Valley Event Center -Bloom Pavilion MM 2017-02-13 2 ALSC Architects I We bring our clients' stories to life. Action Item If you have any additions or corrections to these minutes, please bring them to the attention of the editor within two weeks of the date of this meeting. JJW:tmb:2016-075 Attachment Distribution: Patti Johnson, Kittitas County Parties in attendance JJW/DB/File 2016-075 Kittitas Valley Event Center -Bloom Pavilion MM 2017-02-13 3 ALSC Architects I We bring our clients' stories to life. .4-.M 0 CD c €9 Z Z 5m Ini NIW - -o-s - m - 0 .6 0 Z Ua - --- Z U tL OZ < WZSy�o _ ___ 4 NN 1 0 W N3' ¢� •N- 1� - __ 1 .0 -.OZ .0-d4 .0 -.OZ .9 -.9L .L -.9E L © O O O O O O O O 03 D3 iV w co ? 30� O 01 S Nmwa 0 w ED '070 Z 1Z --OF UJ m v u1 j3z u�m JO=U COOQ x-pz QVaz Z Foul o 0Q 00m NxW X=<ZW 3 LU iv W D_' o mOUD�U S ¢O¢ D: bWo Q� Z0O F Ini NIW - -o-s - m - 0 .6 0 Z Ua - --- Z U tL OZ < WZSy�o _ ___ 4 NN 1 0 W N3' ¢� •N- 1� - __ 1 .0 -.OZ .0-d4 .0 -.OZ .9 -.9L .L -.9E L © O O O O O O O O 3° Lu O p �Ud 0Wo JO=U COOQ Foul NxW z N W D_' o F Q� z F � J o3 on x0 -U Ini NIW - -o-s - m - 0 .6 0 Z Ua - --- Z U tL OZ < WZSy�o _ ___ 4 NN 1 0 W N3' ¢� •N- 1� - __ 1 .0 -.OZ .0-d4 .0 -.OZ .9 -.9L .L -.9E L © O O O O O O O O . � \. /��\\\ ���/\ ��/ w �7� ~ ., n...; r 1' .,i i f'�.. �.,. __. ... 4 r < }' is r ,. � r, �--, - .. r`�5,£'�� d' � r �� � •:\ ��: �,1 �r� #i �: ,,PQ`s as 1 .;y � ,. � �: �, OEM Qp �©2�7 � / U) CD 0 0 / 0 El Lei c- V) co N N O s■ c_- 0 O a +�Q C C 73 O U o Cn a- c\l E + N +� O N `� m O Kittitas County Transfer Station Basis of Design Report Prepared for Kittitas County December 2016 1100 112th Avenue NE Suite 500 Bellevue, WA 98004 Contents Section Page Acronyms and Abbreviations..............................................................................................................v Introduction...................................................................................................................................1-1 1.1 Project Background and Objectives.................................................................................1-1 1.2 Service Area.....................................................................................................................1-1 1.3 Purpose of Basis of Design Report...................................................................................1-2 1.4 Process Selection.............................................................................................................1-2 DesignParameters.........................................................................................................................2-1 2.1 Existing Tonnages and Traffic..........................................................................................2-1 2.2 Projected Design Quantities and Traffic..........................................................................2-2 2.3 Peak Storage.................................................................................................................... 2-2 ConceptualSite Layout Road Geometry ..........................................................................................3-1 3.1 Transfer Trailers...............................................................................................................3-1 3.2 Commercial Vehicles........................................................................................................3-1 3.3 Self -haul Vehicles.............................................................................................................3-1 3.4 Yard Waste/Composting Material Traffic........................................................................3-1 3.5 Recycling Vehicles............................................................................................................3-2 3.6 Moderate -risk Waste Vehicles.........................................................................................3-2 3.7 Employee/Visitor Vehicles...............................................................................................3-2 3.8 Scale Plaza........................................................................................................................3-2 TippingBuilding.............................................................................................................................4-1 4.1 Tipping Floor Level...........................................................................................................4-1 4.2 Ground Floor (Tunnel) Level............................................................................................4-1 CompostingArea............................................................................................................................5-1 5.1 Composting Area Components........................................................................................5-1 5.2 Facility Capacity...............................................................................................................5-2 5.3 Acceptable Feedstocks.....................................................................................................5-2 5.4 Amendments....................................................................................................................5-3 AdministrativeBuilding..................................................................................................................6-1 Scalehouseand Scales....................................................................................................................7-1 RecyclingDrop-off Area..................................................................................................................8-1 ModerateRisk Waste Building........................................................................................................9-1 StormwaterManagement............................................................................................................10-1 FacilityLand Area Requirements...................................................................................................11-1 References...................................................................................................................................12-1 Tables 1-1 Kittitas County Population Estimates: 2015 to 2035....................................................................1-2 EN1213161143SAC DRAFT -12/23/16 iii CONTENTS Section Page 2-1 2015 Ellensburg Transfer Station Quantities and Traffic..............................................................2-1 2-2 Recommended 2046 Design Parameters.....................................................................................2-2 Figures 1 Conceptual Site Plan 2 Transfer Building Plan 3 Transfer Building Elevations (1 of 2) 4 Transfer Building Elevations (2 of 2) 5 Compost Process Flow Diagram 6 Composting Area Plan 7 Scalehouse, Administrative, and Moderate Risk Waste Building Plans 8 Recycling Drop-off Plan EN1213161143SAC DRAFT -12/23/16 Acronyms and Abbreviations ADA Americans with Disabilities Act of 1990 ASP aerated static pile CDL Construction and Demolition Landfill County Kittitas County MRW moderate risk waste MSW municipal solid waste OFM State of Washington Office of Financial Management yd3 cubic yard(s) EN1213161143SAC DRAFT -12/23/16 SECTION 1 Introduction Kittitas County intends to construct a new solid waste transfer station, compost facility, moderate risk waste (MRW) facility, and recycling depot at a new location (that has yet to be determined). The new facility will replace the existing Ellensburg transfer station and will be designed to address some existing site challenges and prepare the County for future growth. The County has retained CH2M HILL, Inc. (CH2M) to perform preliminary engineering services in support of the development of this new solid waste transfer station. The project will also accomplish the following: comply with local planning and state (Washington Administrative Code 173-350-310) regulations; efficiently manage all material types (solid waste, recyclables, and green waste); provide safe operation for customers and workers; be cost effective; be designed to efficiently process material; and address community concerns. The project is expected to be conducted in multiple phases. This report summarizes the work conducted as part of the first phase (Phase A — Project Initiation and Programming) and incudes the basis of design and conceptual layouts for this facility. 1.1 Project Background and Objectives The existing Ellensburg transfer station has location and size constraints. Located in a floodplain, the facility is closed because of customer access issues during significant rainfall or spring runoff events. The facility is also undersized for the number of customers using the facility. The small size of the facility results in long queuing times and potentially unsafe conditions within the small unloading and processing areas. The new transfer station will be designed to address these limitations and to fit the current and long-term needs of the County. The new facility will include a transfer building, composting area, MRW building, and recycling depot as well as various administrative, parking, and other required elements. 1.2 Service Area The existing Ellensburg transfer station, located within the City of Ellensburg, off Industrial Way, is one of two solid waste transfer stations used by County residents. Waste Management, Inc. is the current operator of the transfer facility. Solid waste generated by commercial accounts and residents from Kittitas County is hauled to this transfer station where the solid waste is loaded into transfer trailers and transported approximately 80 miles to the Greater Wenatchee Landfill in Douglas County, Washington. The population of Kittitas County in 2010 was 40,915. Table 1-1 shows the annual population estimates prepared by the State of Washington Office of Financial Management (OFM) for 2015 through 2035. These population values and estimates do not account for the rather large transient student population associated with the Central Washington University in Ellensburg (enrollment of approximately 11,000 students). Population estimates in Table 1-1, indicate a 31 percent average increase in population from 2015 to design horizon 2035. The new transfer station will need to accommodate this significant growth. EN1213161143SAC DRAFT -12/23/16 1-1 SECTION 1—INTRODUCTION Table 1-1. Kittitas County Population Estimates: 2015 to 2035 Kittitas County Transfer Station Basis of Design Report Total Estimated Population Year Intermediate Series High Series 2015 42,592 47,759 2020 45,255 52,395 2025 47,949 57,065 2030 50,567 61,652 2035 53,032 66,075 % growth (2015 to 2035) 24% 38% Average % growth 31% Source: http://www.ofm.wa.gov/pop/gma/proiectionsl2/GMA 2012 county pop pro 0ections.pdf 1.3 Purpose of Basis of Design Report This Basis of Design document provides the project team with vital facility design parameters and land area required for a new facility. This information was gathered during the project workshop that was conducted with County staff and the existing site operator on November 2, 2016. Key "takeaways" from the workshop included design parameters (tons per day, peak daily flows, tipping floor storage capacity) for current and future materials (solid waste, recycling, green waste, other materials), and confirmation about other important facility parameters such as compost area size, administrative building requirements, parking requirements (including contract operator truck parking), and County equipment preferences (scales, software, equipment, etc.). 1.4 Process Selection The new transfer station will be designed to operate in a similar fashion to the existing facility and will use open -top trailers to haul the municipal solid waste (MSW). The main transfer building will be a two-level facility with a drive-through tunnel for loading. Commercial collection vehicles and residents will deposit their loads directly onto the tipping floor (the upper level). A front-end loader will move the waste from the tipping floor to floor opening(s) over the tunnel to push the MSW into the trailers below. In addition to the main transfer building, the facility will include a composting area, MRW building, recycling depot, and support equipment and structures. 1-2 EN1213161143SAC DRAFr-12/23/16 SECTION 2 Design Parameters Design parameters used in this basis of design report are based on 2015 data provided by the County, additional information gathered during the November 2, 2016 workshop, and the 31 percent population increase estimates that were described in Table 1-1. This data is further discussed in the sections below. 2.1 Existing Tonnages and Traffic The existing Ellensburg transfer station accepts, processes, and transfers MSW, yard waste, recyclable material, and MRW material from residential and commercial customers in the Ellensburg area and lower Kittitas County. Material is hauled to the facility in commercial garbage trucks and from a significant flow of self -haul vehicles (automobiles, pickup trucks, and trailers). Table 2-1 summarizes 2015 quantities and traffic at the Ellensburg transfer station. Table 2-1.2015 Ellensburg Transfer Station Quantities and Traffic Kittitos County Transfer Station Basis of Design Report Category 2015 Quantities (tons) 2015 Traffic (vehicles) MSW, Yard Waste, CDL Quantities and Incoming Trak Commercial — MSW 15,327 3,626 Commercial —yard waste 387 255 Commercial —CDL 2 1 Self -haul — MSW 7,056 51,458 Self -haul —yard waste 2,011 9,139 Self -haul — CDL 1,767 3,608 Yard waste from Cie Elum 320 45 Tires from Cie Elum 71 11 MRW 1,000a Total Incoming 26,941 68,143 MSW and Material Outgoing Compost sold 1,537 172 Recycling drop -box 747 354 Vehicle batteries 3 4 Metal 48 5 MSW transfer to Wenatchee 22,543 909 CDL to Ryegrass Landfill 1,373 179 Total Outgoing 26,251 1,623 aApproximateiy 1,000 customers used the MRW facility in 2015. Note: CDL = Construction and Demolition Landfill Table 2-1 does not include an estimated 50,000 to 60,000 customers that used the recycling drop-off area in 2015 or septage or leachate loads that are weighed at the scalehouse. EN1213161143SAC DRAFF-12/23/16 2-1 SECTION 2—DESIGN PARAMETERS In 2015, the County weighed 161 septage hauler vehicles at the scalehouse and hauled 60 truckloads of leachate from the facility (compost stormwater ponds and transfer station tunnel) to the Ryegrass Landfill septage facility. In addition, the Ellensburg transfer station weighed Waste Management, Inc.'s curbside recycling trucks containing single stream and cardboard recycling material at the scalehouse (420 vehicles representing 1,283 tons). These loads are not included in the table above. Table 2-1 also does not include an estimated 50,000 to 60,000 customers that used the recycling drop- off area in 2015. In summary, the existing Ellensburg transfer station accepted, processed, and transferred approximately 27,000 tons of MSW, yard waste, and CDL from approximately 70,000 vehicles in 2015. 2.2 Projected Design Quantities and Traffic Projected waste quantities were estimated using 2015 quantities, a 30 -year design life, and OFM population projections (intermediate to high growth — 31 percent) through 2035. Table 2-2 summarizes the estimated design waste volumes for the proposed facility. Table 2-2 Recommended 2046 Design Parameters Kittitas County Transfer Station Basis of Design Report Parameter Quantity Unit Current waste tonnage 80 Tons per day Projected 2046 waste tonnage 105 Tons per day 2046 peak -hour tonsa 26 Tons per hour 2046 peak -hour trafficb 78 Vehicles per hour 2046 yard waste quantitiesc 7,145 Tons per year a Based on CH21A's previous experience, a peak hourly tonnage was estimated using 25 percent of the daily tonnage. bThe peak -hour vehicle count was determined by using the 2015 Peak Hour (Saturday, July 9, 2016) vehicle count and increasing it by the estimated growth (31 percent). c Yard Waste quantities are based on doubling the current quantities and increasing that amount by the estimated growth rate (31 percent). 2.3 Peak Storage To account for inclement weather conditions and other unexpected issues that may affect delivery of waste to the landfill, 5 days of peak storage are used to size the waste receiving and processing building. The 5 -day peak storage quantity is 525 tons and was calculated using five times the 2046 average daily throughput (105 tons per day). Contingency storage of up to 7,000 cubic yards (i.e., approximately 10 days of current waste receipts) could be accomplished by stacking waste 10' deep across the tipping floor. 2-2 EN1213161143SAC DRAFT— 12/23/16 SECTION 3 Conceptual Site Layout Road Geometry The proposed facility is designed to keep traffic flowing in the same general direction and minimizing traffic cross-over points. The conceptual layout uses a counter -clockwise loop, which is an industry standard safety practice, to allow collection vehicle drivers a proper backing site -line, without having to rely on passenger side mirrors. It is assumed that the site of the proposed facility will be located in an area of high groundwater, requiring the placement of approximately 15 feet of structural fill to elevate the transfer building tipping floor to allow gravity feed of solid waste to open -top transfer trailers in the tunnel. The road configuration for each of the vehicle and customer types is discussed in the following sections. 3.1 Transfer Trailers The basic design principle for the site layout is to use perimeter roads for transfer trailer traffic with a counter -clockwise loop to minimize traffic impacts on vehicles accessing the transfer building. Transfer trailers will enter the site and use the bypass lane to maneuver around the scalehouse. The transfer building is designed with a drive-through tunnel to minimize backing of transfer trailers. Loaded and empty trailers will use a lane adjacent to the transfer building (on both sides) for parking. A pit scale will be installed under the load -out port to maximize trailer loads. Once a trailer is loaded with solid waste, the truck will pull through the tunnel and will park, or use the bypass lane to exit the site. Transfer trailers will make a complete circle around the site, passing several merge points, but never having to cross traffic. 3.2 Commercial Vehicles Commercial vehicles will enter the facility and proceed to the scalehouse where their weights will be recorded. Departing the scale plaza, the vehicle will turn left at the entrance to the tipping building, where the vehicle will use a dedicated lane and climb up a 4 ± percent slope to the flat backing apron located outside the tipping building. The vehicle will back in the proper direction (over the left shoulder) into the building where solid waste will be unloaded onto a flat concrete floor. The vehicle will depart the site using an access road and proceed across the scale to record the tare (empty) weight in order to calculate the solid waste tonnage. Commercial vehicles with tare weight on file may use the bypass lane. 3.3 Self -haul Vehicles Self -haul vehicles will use the same general traffic pattern that is used by commercial vehicles, but self - haul vehicles will use a dedicated lane to access the backing apron and separate unloading area. The self -haul vehicle will proceed to a separate unloading area, discharge the material onto the concrete tipping floor, and exit the site using the shared outbound scale lane. 3.4 Yard Waste/Composting Material Traffic Customers dropping off yard waste will proceed to the scalehouse to obtain their weights and proceed along the perimeter access road to the yard waste unloading area. After discharging yard waste material, the vehicle will proceed to the scalehouse. Yard waste traffic will have to cross the loaded - outbound transfer trailer lane. The crossing will not affect traffic because it is estimated that only four to five transfer trailers per day will be hauled offsite (which equals about one trailer every 2 hours). EN1213161143SAC DRAFT -12/23/16 3-1 SECTION 3 - CONCEPTUAL SITE LAYOUT ROAD GEOMETRY 3.5 Recycling Vehicles Recycling vehicles will have a separate entrance before the scalehouse. The recycling drop-off area will be a pull-through type facility with adequate unloading areas. An additional two pull-through lanes will be available during peak times (i.e., Saturdays). 3.6 Moderate -risk Waste Vehicles Customers dropping off used oil and antifreeze will access the MRW building using the recycling drop-off area entrance. They will enter the MRW facility using a drive-through lane. Customers dropping off other MRW material (batteries, household chemicals, batteries, etc.) will contact the County for drop off. A County representative will meet the customer at the same drive-through lane to drop off material. 3.7 Employee/Visitor Vehicles County employee and visitor traffic will turn left before the scalehouse to access the administrative building. Contract employees will proceed past the scalehouse (via the bypass lane) and will park in areas near the transfer building. 3.8 Scale Plaza The scale plaza is designed initially with one inbound and one outbound scale to handle all traffic. The scale plaza is designed with a bypass lane for transfer trailers and has an area where another scale could be added at a later date. There are accommodations for automated inbound and outbound commercial transactions in the future (e.g., card -readers, RFID, etc.) See Figure 1 for conceptual facility layout. 3-2 EN1213161143SAC DRAFr-12/23/16 SECTION 4 Tipping Building The approximate 100- by 210 -foot transfer building will be divided into three primary functional areas: (1) waste receiving, storage, and handling; (2) tire and white goods loading area; and (3) contractor offices. 4.1 Tipping Floor Level The tipping floor level will consist of a cast -in-place concrete floor surface enclosed by a separate superstructure. The large tipping floor area will be covered by a pre-engineered steel rigid frame system spanning the entire floor. Cast -in-place concrete push walls protecting the exterior building walls will be constructed independent of the building's framing. Walls enclosing the tipping floor will be a combination of metal panel walls designed to be hosed down for cleaning, and louvered openings will be provided as needed for cross ventilation. Translucent panels will be used high in the wails to provide a natural light source where possible: The exterior walls of the contractor office area will be a combination of cast -in-place concrete and load-bearing concrete block masonry walls. The tipping floor has two separate areas for unloading commercial and self -haul vehicles. The commercial unloading area is designed to handle four vehicles at a time, includes areas for at least 5 days of storage, and has an area for stockpiling single stream recycling material for load -out by the contract operator. The self -haul unloading area is designed to unload nine vehicles at a time and has an area designated for stockpiling construction and demolition debris material for separate load -out. During peak times (Saturdays), the commercial unloading area will be available to unload self -haul vehicles. The transfer building roofing system is designed to provide a minimum of 28 feet of clearance to allow unloading of all types of garbage trucks and other vehicles. The roof is designed so that rain water will flow to the load -out tunnel side of the building at a slope of 2 to 12. The roof system will consist of metal standing -seam panels and selected areas of skylight panels attached to the sub -framing of the pre-engineered building. The metal roof panels will have a bottom surface of sheet metal to protect insulation from water generated by interior hose -down activities. Perimeter gutters will provide drainage from the upper roof with external downspouts discharging to underdrains at the foundation. 4.2 Ground Floor (Tunnel) Level The ground floor level constructiori will be primarily cast -in-place concrete with portions of the exterior wall surfaces exposed to view. These exposed areas will be finished using painted concrete. Doors, framing, and window framing materials will match other buildings onsite using noncorroding materials wherever possible. The load -out tunnel will have a flat concrete floor, with a pit scale under the load -out port. The tunnel may have two 15 -foot -wide by 20 -foot -high doors (one on either end). See Figure 2 for the transfer building plan and Figures 3 and 4 for building elevations. EN1213161143SAC DRAFT -12/23/16 4-1 SECTION 5 Composting Area Similar to the existing operation, the new composting area will be an outdoor operation designed to accept and process yard waste, agricultural by-products, and wood waste into compost. Future addition of other feedstocks may be considered at a later date; however, the County has indicated that it is not interested in accepting post -consumer food waste or biosolids at this site. The composting technology used at the new site will be different from that at the existing windrow operation. The new site will use a combination of aerated static pile (ASP) and windrow curing, and will be designed to be operated in a batch process. 5.1 Composting Area Components The following key components of the proposed development are shown on the attached process flow diagram (Figure 5) and compost area concept layout (Figure 6): • An uncovered feedstock receiving, grinding, and mixing area (223 feet by 242 feet) situated just off the compost traffic lane, toward the top of the site. This area will be designed for back -in access to customers for dropping off materials for composting. Feedstocks will be unloaded onto the asphalt pad in this area and then subsequently moved or handled with a small front-end loader. The existing electric grinder will be used to grind feedstock and amendment as needed. Eight outdoor (55 feet by 25 feet) ASP composting systems with back, side, and interior walls constructed of ecology blocks. These systems will have an associated biofilter odor treatment system. This area will be designed for a material residence time of 4 weeks. The ASP composting system will consist of eight discrete aeration zones that are constructed in two identical groups of four. The two groups of aeration zones will run independently of each other, and each will consist of the following components: — On -grade high-density polyethylene aeration laterals situated below each composting pile (two per aeration zone) — An above -grade header pipe that distributes air to and from the aeration laterals (one per aeration zone) — A common process air duct that provides the connection between the individual aeration zone headers and the fan equipment — Centrifugal fans (one per group of four aeration zones) and associated dampers that allow airflow to each zone to be controlled — An organic media biofilter that will treat process air collected from the composting piles • An outdoor pad for windrow curing of feedstocks. The size of the windrow pad will be based on managing materials in up to 18 windrows that are up to 18 feet wide and 7 feet high using a large straddle -type windrow turner with an 8 -week residence time. The typical length of each windrow will be 115 feet. • A screening area between the curing windrows. The aisle between the two rows of curing windrows will be wide enough to accommodate the existing trommel screen. • An amendment storage and finished product screening and storage pad designed for up to eight rectangular finished product piles that are 55 by 75 feet and will accommodate a height of 12 to 13 feet. Piles will be made with a front-end loader. EN1213161143SAC DRAFT -12/23/16 5-1 SECTION 5 -COMPOSTING AREA • A product sales area located near the finished product storage area. Up to three surface water retention ponds to capture runoff from the active operating areas. The site will be graded to separate runoff from the ASP and receiving area from the rest of the site so that surface water collected from areas other than the ASP pad and receiving area can be used to moisten piles as needed. Leachate and condensate that collect within the aeration system's laterals and ducts will be captured and drained via gravity through polyvinyl chloride piping to one of two leachate manholes. The two leachate manholes will also serve as the "water trap" that is necessary to allow leachate and condensate to drain continuously from the aeration system while it is in operation. The leachate manholes will be equipped with electric pumps and float level sensors that will transfer liquid that collects in the manhole to the retention pond located near the ASP area. 5.2 Facility Capacity The facility is designed to accept and process the projected 7,000 tons per year of feedstocks that are anticipated. The facility design also factors in the historical peaking factor based on quarterly data from 2013 through 2015 from the existing site. However, the mass of material present at the site at any one time will vary based on the type of equipment used to form and turn the windrows, residence times, and the density and moisture content of the materials being composted. For these reasons, it is more convenient to refer to the volumetric capacity of the various composting systems. The facility will have the following capacities: • The ASP composting system is designed around operators constructing two composting piles per week which have a combined capacity of up to 654 cubic yards (yd 3). At times of the year when feedstock quantities are lower, the composting piles will be built with a lower height. • The capacity of the windrow composting and curing operation is expected to be approximately 5,028 yd3. However, this capacity may change (increase or decrease) as a result of changes in turning methods and equipment and changes in windrow spacing. These changes can be accommodated without the need to expand the physical size of the windrow pad. The amount of material stored in the finished product storage area is expected to vary significantly from year to year. Also, amounts will vary within each year based on compost production levels and market demand. The capacity of the area will be based on storage of materials in eight rectangular piles (75 feet by 55 feet). However, this storage capacity will be increased to respond to lagging seasonal or year -over -year market demands by building stockpiles closer together or using an extended pile configuration. 5.3 Acceptable Feedstocks The new facility will be designed to process the same materials that the existing facility is permitted to receive and process (Type 1 [vegetative] and Type 2 [manures] feedstocks), which include the following: • Landscaping and yard trimmings • Wood wastes (natural woody debris, including land clearing stumps and brush, and clean, unpainted, and untreated dimensional wood) • Straw and bedding with associated manures (primarily from nearby fairgrounds and small farms) Future addition of pre -consumer food waste may be considered at a later date. The current site experiences seasonal variation of compost material depending on the weather. During the late fall and early winter periods, incoming material contains a higher proportion of brush and tree limbs. 5.2 EN1213161143SAC DRAFr- 12/23/16 SECTION 5 -COMPOSTING AREA 5.4 Amendments Amendments are normally added to organic feedstocks as part of the composting process. This is done to adjust the moisture content and carbon -to -nitrogen ratio to the desired range. In addition, amendments provide structure and free air space to improve the movement of air through the composting pile. While the necessary adjustments can often be achieved through the use of one amendment type, it is not uncommon to use two or more amendments to achieve the desired results. Amendments may also be added to curing piles orto finished compost product to enhance their agronomical characteristics. The following are common amendment sources that may be used at the compost facility: • Wood chips produced from onsite grinding of wood waste, dimensional lumber and logs, stumps, or brush, or purchased from material brokers • Oversized material screened from finished compost produced at the site (screening overs) • Leaves and brush from leaf and yard waste diversion programs • Cardboard and paper • Sawdust • Straw Actual quantities and types of amendments used at the site will vary from week to week depending on feedstock characteristics and amendment availability. EN1213161143SAC INSERT LEGAL ENTITY (IF APPLICABLE) 5-3 SECTION 6 Administrative Building The administrative building will be designed primarily for County staff and will be located near the entrance/exit of the facility. Additionally, this building will be located near the MRW building, scalehouse, and recycling depot, and will also be accessible to visitors without requiring them to cross the scales. The administrative area will be constructed with a pre-engineered steel rigid -frame system. The exterior walls of the administrative area will be a combination of cast -in-place concrete and metal panel siding over steel framing. The architectural features of this building will be similar to those of the scalehouse. The administrative building will include the following main features: • A reception/customer service area • A conference room with capacity for 16 to 18 people • Three enclosed offices and four open offices (cubicles) • Two Americans with Disabilities Act of 1990 (ADA) -accessible restrooms for staff See Figure 7 for the administrative building plan. EN1213161143SAC DRAFT -12/23/16 6-1 4 SECTION 7 Scalehouse and Scales The new facility will be equipped with an inbound and outbound manual scale, and an inbound automated scale that will be dedicated for commercial accounts. The scalehouse and scale area will also have room to accommodate a future outbound automated scale. The scalehouse will be situated between the inbound and outbound manual scale and will have a working area large enough to accommodate three computer screen monitors (each side for inbound/outbound), a camera system, an ADA -accessible restroom, one ADA parking stall, a break area, and a floor -mounted safe that will be built into the floor. The exterior walls of the scalehouse will be a combination of cast -in- place concrete and metal panel siding over steel framing. The architectural features of this building will be similar to those of the administrative building. See Figure 7 for the scalehouse plan. EN1213161143SAC DRAFT -12/23/16 7-1 SECTION 8 Recycling Drop-off Area Similar to the existing site, the new site will include a recycling drop-off area that is accessible without going through the scale. The recycling drop-off area will include a row of 15 roll -off containers located on a concrete pad with an ADA ramp, ADA platform, and stairs on both ends of the row. The area will not be covered. Both sides of the row of roll -off boxes will be accessible during peak days and hours. Only one side of the row of roll -off boxes will be accessible during non -peak days and hours. Each side will be equipped with two drive-through lanes and one bypass lane. A gate on either end of the roll -off boxes will be used to control access to the side used only for peak periods. See Figure 8 for the recycling drop-off area plan. EN1213161143SAC DRAFT- 12/23/16 8-1 SECTION 9 Moderate Risk Waste Building The new MRW building will be much larger than the current facility in order to improve separation and storage as required. The MRW building will be an open, two-sided structure with a fully enclosed portion that is explosion proof and has proper ventilation. The building will be located before the scale and will be designed for customers to pull through the drive-through area that will be located under a roof. See Figure 7 for the MRW building plan. EN1213161143SAC DRAFT -12/23/16 9-1 SECTION 10 Stormwater Management The site drainage and stormwater scheme will be largely dependent on the actual site that is selected. However, it is anticipated that the site will be graded to maximize gravity flow. Stormwater will be collected in a series of swales and retention basins strategically located throughout the site. The collected stormwater can be used for the composting process as needed, and contact water from the transfer station's loadout tunnel will be managed as leachate. EN1213161143SAC DRAFT -12/23/16 10-1 n SECTION 11 Facility Land Area Requirements Based on the results of facility needs and future growth projections for Kittitas County, the estimated area required to provide the solid waste and material management needs for this new facility will be approximately 20 to 25 acres. This estimate does not take into account site-specific features and dimensional limitations that may modify the space and design requirements. However, this estimate will provide the County and the CH2M team with the required information to begin identifying and evaluating specific sites. EN1213161143SAC DRAFT -12/23/16 11-1 SECTION 12 References CH2M, Workshop Meeting Summary (with Kittitas County), conducted November 2, 2016 Kittitas County, Kittitas County Ellensburg Transfer Station Scale -house Data. 2015 Kittitas County, Kittitas County Ellensburg Transfer Station As-builts Kittitas County, 2010 Solid Waste and Moderate Risk Waste Management Plan Update, August 2011 State of Washington, Washington Administrative Code, Solid Waste Handling Standards, WAC 173-350 State of Washington Office of Financial Management (SWOFM). County Growth Management Population Projections by Age and Sex: 2010-2040 [online]. Olympia, Washington. 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