EXPANDED ENVIRONMENTAL CHECKLIST

EXPANDED ENVIRONMENTAL CHECKLIST _____________________________________________________

FOR THE PROPOSED

MODERNIZATION AND EXPANSION OF SUMNER HIGH SCHOOL,

A PHASED MASTER PLAN PROJECT (Major Amendment to CUP PLN-2018-0015)

SUMNER-BONNEY LAKE SCHOOL DISTRICT NO. 320

Prepared by: Sumner-Bonney Lake School District

________________________________________________

February 19, 2021

TABLE of CONTENTS Pages

A. Background1. Name of the Proposed Project ......................................................................................2. Name of Applicant .........................................................................................................3. Address and Phone Number of Applicant/Contact Person.............................................4. Date Checklist Prepared ...............................................................................................5. Agency Requesting Checklist ........................................................................................6. Proposed Timing/Schedule ...........................................................................................7. Future Plans ..................................................................................................................8. Additional Environmental Information ............................................................................9. Pending Applications of Other Projects .........................................................................10. Governmental Approvals ...............................................................................................11. Project Description ........................................................................................................12. Project Location ............................................................................................................

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B. Environmental Elements1. Earth ..............................................................................................................................2. Air ..................................................................................................................................3. Water .............................................................................................................................4. Plants ............................................................................................................................5. Animals .........................................................................................................................6. Energy and Natural Resources......................................................................................7a. Environmental Health ....................................................................................................7b. Noise ............................................................................................................................8. Land and Shoreline Use ................................................................................................9. Housing .........................................................................................................................10. Aesthetics .....................................................................................................................11. Light and Glare ..............................................................................................................12. Recreation .....................................................................................................................13. Historic and Cultural Preservation .................................................................................14. Transportation ...............................................................................................................15. Public Services .............................................................................................................16. Utilities ..........................................................................................................................

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C. Signature ........................................................................................................................ 47

Appendices Revised Project: Major Amendment to Conditional Use Permit (CUP) Site Plan, dated February 1, 2021, prepared by AHBL Engineers (required information for CUP under SMC 18.48.050)

Revised Project (Major Amendment) CUP Criteria Letter, dated February 16, 2021, prepared by Matthew Guilanians, Project Manager, Hainline & Associates

Major Amendment to SEPA Environmental Checklist Sumner-Bonney Lake School District – SHS Modernization Page 2 of 47 (WAC 197-11-960) and Expansion, a Phased Master Plan


Revised Project Request for Height Exception, dated February 15, 2021 prepared by Matthew Guilanians, Project Manager, Hainline & Associates Sumner High School Master Site Plan Rendering, dated February 1, 2021, prepared by BLRB Architects Sumner High School Master Plan Height Exception Exterior Elevations, April 14, 2020, prepared by BLRB Architects Sumner High School Master Plan Building Height Analysis, dated February 1, prepared by BLRB Architects Sumner High School Master Plan, Setback Modulation Plan, dated February 1, 2021 Sumner High School Master Plan Shadow Analysis Study, dated February 1, 2021 prepared by BLRB Architects Sumner High School Master Plan Exterior Color Renderings, dated August 11, 2020, prepared by BLRB Architects Sumner High School Master Plan Geotechnical Engineering Report, dated May 22, 2020 Sumner High School Master Plan Transportation Technical Report, prepared by Heffron Transportation, dated February 10, 2021 Sumner High School Master Plan Noise Study, dated February 12, 2021, prepared by Ramboll US Corporation Sumner High School Master Plan Site Lighting and Multi-Use Field Lighting Study, dated February 12, 2021, prepared by Stantec Sumner High School Master Plan Site and Parking Lots Photometric Plan, dated October 19, 2020, prepared by BCE Engineers with Light Fixtures Cut Sheets (Appendices C and D to Lighting Study) Sumner High School Master Plan Multi-Use Field, Tennis Courts, and Stadium Photometric Plan, dated January 2021 and October 2020, respectively, prepared by MUSCO with Fixture Cut Sheets, (Appendices E, F, and G to Lighting Study) Sumner High School Master Plan Landscape Plan, dated February 1, 2021, prepared by Weisman Design Group Sumner High School Master Plan Project Construction Sequencing Plan with Narrative Description, detailing Phase I and Phase 2, dated February 1, 2020, prepared by Matthew Guilanians, Project Manager, Hainline & Associates Sumner High School Master Plan Stormwater System Plan, dated February 1, 2021, prepared by AHBL Engineers with associated Memorandum prepared by AHBL Engineers


Sumner High School Master Plan Water System Plan, dated February 1, 2021, prepared by AHBL Engineers with associated Memorandum prepared by AHBL Engineers Sumner High School Master Plan Sewer System Plan, dated February 1, 2021, prepared by AHBL Engineers with associated Memorandum prepared by AHBL Engineers Sumner High School Master Plan Right-of-Way Improvements Plan with Bulb Out Detail, dated as of February 1, 2021 Sumner High School Master Plan ROW/Deed Conveyances Map, dated January 30, 2021 Code Compliance Site Plan, dated April 14, 2020 Sumner High School Master Plan (Phase 1) Interior Floor Plans, dated October 30, 2019, prepared by BLRB Architects Sumner High School Master Plan (Phase 2) Interior Floor Plans, dated October 30, 2019, and November 13, 2019, prepared by BLRB Architects


Purpose of Checklist:

The purpose of this Expanded Environmental Checklist is to identify and evaluate any probable significant, environmental impacts that could result from the modernization and expansion of Sumner High School under a complete replacement of the High School under a phased Master Plan Project and to identify measures to mitigate any such impacts. The Sumner High School Master Plan Project involves a request for a Major Amendment to an existing Conditional Use Permit issued by the City of Sumner (CUP PLN-2018-0015) to provide for the phased construction of a new High School on the existing campus of Sumner High School (1707 Main Street) together with eleven (11) abutting parcels located at 1101 and 1111 Wood Avenue and 1412, 1416, 1420, 1424, 1428, 1432, 1434, 1502, and 1506 Mason Street and additional parking facilities located at 1518 Main Street, 914 and 908 Meeker Avenue, Sumner, Washington, as part of the Elhi Hill Program as approved under CUP PLN-2018-0015.

The State Environmental Policy Act (SEPA) under Chapter 43.21C. RCW requires that all governmental agencies consider the environmental impacts of a proposal before the proposal is decided upon. This Environmental Checklist has been prepared in compliance with the State Environmental Policy Act; the SEPA Rules, as amended (Chapter 197-11, Washington Administrative Code) as incorporated by the Sumner-Bonney Lake School District policies and procedures.

This document is intended to serve as SEPA review for the Modernization and Expansion of Sumner High School, as a Phased Master Plan, as a Major Amendment to CUP-PLN-2018-0015. Analysis associated with the proposed Project set forth in the Expanded Environmental Checklist is based on the plans, studies, and reports for the Project, which are attached hereto as Appendices and are on-file with the Sumner-Bonney Lake School District and the City of Sumner. The plans, studies, and reports are considered adequate for analysis and disclosure of environmental impacts.

This Expanded Environmental Checklist is organized into three major sections. Section A of the Checklist (starting on page 1) provides background information concerning the Proposed Action (e.g., purpose, proponent/contact person, project description, project location, etc.). Section B (beginning on page 6) contains the analysis of environmental impacts that could result from implementation of the proposed project, based on review of major environmental parameters. This section also identifies possible mitigation measures. Section C (page 47) contains the signature of the proponent, confirming the completeness of this Final Environmental Checklist.

Project-relevant plans, studies, and reports that serve as a basis for this Expanded Environmental Checklist are attached to this Checklist and are identified on Pages 2 and 3.


A. Background 1. Name of proposed project, if applicable:

BACKGROUND OF PRIOR SEPA PROPOSAL AND REVISED PROPOSAL This Revised Environmental Checklist substantially revises and sets forth a Major Revision to the Environmental Checklist, dated March 2, 2018, as modified by the First Addendum, dated May 15, 2018, and by the Second Addendum, dated December 23, 2020. The Sumner-Bonney Lake School District (the “District”) was issued a Conditional Use Permit (PLN-2018-0015), following completion of the SEPA review process, and a hearing on and approval of a Conditional Use Permit Application, by the City of Sumner Hearing Examiner, dated June 7, 2018, for the modernization and expansion of the Sumner High School (SHS) campus in the nature of construction of approximately 52,000 sq. ft. of new additional instructional area with an additional approximate 71,000 sq. ft. of replacement area to house a new Commons, library with attached courtyard, kitchen, and a new Three-Story Academic Wing with support services, and additional parking on the Main Campus located at 1707 Main Street and acquired abutting parcels together with a change of use to allow the Elhi Hill Educational Program to provide for renovation of an existing building to house the Program within a former medical office building located at 1518 Main Street with new parking located on acquired adjacent parcels on Meeker Avenue (collectively, the “Prior Proposal” or “Original SEPA Proposal”). In October of 2018, the District went out to bid on the Prior Proposal and received only one bid which substantially exceeded the budget for the Prior Proposal arising from the then over-heated construction environment. In December of 2018, the Board of Directors of the District, by unanimous decision, paused the Prior Proposal to review, study and evaluate that proposal with community engagement. A Construction Review Task Force (“Task Force”), comprised of community members, experienced in the planning, engineering, and construction fields, led by an experienced, neutral facilitator and an experienced school project management company, Hainline & Associates (“Hainline”), were convened to conduct a review, study, and evaluation of the Prior Proposal.

Over a three month period, on four occasions, in the Spring of 2019, the Task Force met, with the assistance of the facilitator and Hanline, to carefully, thoroughly, and comprehensively review the Prior Proposal which led to the SHS Construction Task Force Report and Recommendation to the Superintendent, to:

• Maintain the Elhi Hill Educational Program Project together with the adjoining parcels on

Meeker Avenue for a future parking lot (part of the Original SEPA Proposal). • Maintain incorporation of the adjoining District-owned parcels on Mason Street and Wood

Avenue as part of the Project and Original SEPA Proposal. • Totally replace the existing Sumner High School campus in phases:

• the initial (Phase 1) would construct a new building (Phase 1 Building) consistent with the 2016 Capital Bond goals; and

• the second phase (Phase 2 West Building and Phase 2 East Building) would fully build out a replacement Sumner High School upon approval of an additional capital bond by the District’s constituents.

Upon public notices in late May and early June of 2019, two public meetings were held by the District to present the SHS Construction Review Task Force’s Report and Recommendation. Positive input from the two public meetings was received which led to a recommendation by the Superintendent to


the District’s Board: (i) to adopt the Task Force’s Report and Recommendation for a phased project under a Master Plan, (ii) to carry out Phase I with the 2016 Capital Bond funds, and (iii) to convene a Facilities Steering Committee to analyze an additional capital bond to fully buildout the replacement Sumner High School.

On June 18, 2019, by Board Resolution No. 21 2018-19, the District’s Board unanimously adopted the Superintendent’s recommendation to modernize and expand the Sumner High School campus by totally replacing Sumner High School under a phased Master Plan. In September 2019, a Facilities Steering Committee, consisting of parents, community members, and staff, was convened to review and evaluate additional capital bond funding for Phase II of the Sumner High School Master Plan. The Sumner High School Master Plan was re-confirmed with a recommendation by the Facilities Steering Committee to move forward with a capital bond election. Upon Board authority by Resolution, a bond election was held in February of 2020 which was not successful. Thereafter, the COVID-19 pandemic delayed further bond planning at the present time.

The Board re-affirmed its direction to proceed with the phased Master Plan to modernize and expand Sumner High School through a replacement High School (the “Revised Proposal” or “Revised Project”). Consistent with the Mitigated Determination of Non-Significance issued on April 26, 2018 and the CUP (PLN 2018-0015) issued in June of 2018, as extended by approval of the City of Sumner in accordance with Sumner Municipal Code (SMC) 18.56.220, permitting was obtained, and (i) renovation of the former Multi-Care Building for the Elhi Hill Educational Program proceeded and has been completed, (ii) demolition of the residences on Wood Avenue, Mason Street, and Meeker Avenue proceeded and have been completed, (iii) installation of temporary portables to house students during construction has been completed; (iv) construction of the parking lot on Meeker Avenue is underway, and (v) thirty-six (36) parking stalls have been opened up on the existing parking lot known as the “North Parking Lot”). Therefore, these elements will not be re-evaluated under the Revised Proposal.

REVISED PROPOSAL (A Phased Master Plan Project)

Sumner High School Modernization and Expansion, a Phased Master Plan (collectively, the “Master Plan Project”, “Revised Proposal” or “Revised Project”) or at times, Phase 1 and Phase 2 of the Master Plan will be referred to herein individually, as necessary by its separate title. (Note: although demolition of the residences on Wood Avenue and Mason Street and construction of the Meeker Avenue Parking Lot will not be re-evaluated, as noted, reference may be made to those elements for completeness of identifying the Revised Proposal which incorporates those elements.) A component of the Master Plan Project will include negotiating a Development Agreement with the City of Sumner in accordance with the authorization under Sumner Municipal Code ch. 18.20 subject to the City of Sumner Hearing Examiner review and approval by the City of Sumner Council.

2. Name of applicant Sumner-Bonney Lake School District No. 320 3. Address and phone number of applicant and contact person:


Applicant Sumner-Bonney Lake School District No. 320 1202 Wood Avenue Sumner, WA 98390 Attention: Laurie Dent, Ph.D., Superintendent 253-891-6080 [email protected] Agent and Contact Person Matthew Guilanians Project Manager Hainline & Associates, Inc. 411 First Ave South, Suite 210 Seattle, WA 98104 Telephone: 206-880-8505 Email: [email protected] 4. Date checklist prepared: February 19, 2021 5. Agency requesting checklist: Sumner-Bonney Lake School District City of Sumner 6. Proposed timing or schedule (including phasing, if applicable):

Phase I of the modernization and expansion of the Sumner High School campus is intended to commence the summer of 2021 and is intended to be completed the Fall of the 2023-24 school year. Commencement and completion of Phase 2 is subject to successful passage of a capital bond election to be held in the future upon Board authorization following convening a Facilities Steering Committee. For planning purposes, a preliminary commencement date of construction of Phase 2 is the 2023-24 school year with completion in 2026.

7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain.

There are no plans at the present time for future additions or expansion. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal.

mailto:[email protected]

mailto:[email protected]


ORIGINAL SEPA PROPOSAL Mitigated Determination of Non-Significance, issued on April 26, 2018, as amended by the First Addendum, issued May 18, 2018, and the Second Addendum, issued December 23, 2020, to the extent applicable to the Meeker Avenue Parking Lot and demolition of the residences located on Meeker Avenue, Wood Avenue, and Mason Street. The associated SEPA Environmental Checklist with attachments, dated March 2, 2018, in conjunction with the MDNS issued on April 26, 2018 as amended. MASTER PLAN PROJECT Revised Project: Major Amendment to Conditional Use Permit (CUP) Site Plan, dated February 1, 2021, prepared by AHBL Engineers (required information for CUP under SMC 18.48.050)

Revised Project (Major Amendment) CUP Criteria Letter, dated February 16, 2021, prepared by Matthew Guilanians, Project Manager, Hainline & Associates

Revised Project Request for Height Exception, dated February 15, 2021 prepared by Matthew Guilanians, Project Manager, Hainline & Associates

Sumner High School Master Site Plan Rendering, dated February 1, 2021, prepared by BLRB Architects

Sumner High School Master Plan Height Exception Exterior Elevations, April 14, 2020, prepared by BLRB Architects Sumner High School Master Plan, Setback Modulation Plan, dated February 1, 2021 Sumner High School Master Plan Building Height Analysis, dated February 1, prepared by BLRB Architects

Sumner High School Master Plan Shadow Analysis Study, dated February 1, 2021 prepared by BLRB Architects Sumner High School Master Plan Exterior Color Renderings, dated August 11, 2020, prepared by BLRB Architects Sumner High School Master Plan Geotechnical Engineering Report, dated May 22, 2020 Sumner High School Master Plan Transportation Technical Report, prepared by Heffron Transportation, dated February 10, 2021

Sumner High School Master Plan Noise Study, dated February 12, 2021, prepared by Ramboll US Corporation

Sumner High School Master Plan Site Lighting and Multi-Use Field Lighting Study, dated February 12, 2021, prepared by Stantec

Sumner High School Master Plan Site and Parking Lots Photometric Plan, dated October 19, 2020, prepared by BCE Engineers with Light Fixtures Cut Sheets (Appendices C and D to Lighting Study)


Sumner High School Master Plan Multi-Use Field, Tennis Courts, and Stadium Photometric Plan, dated January 2021 and October 2020, respectively, prepared by MUSCO with Fixture Cut Sheets, (Appendices E, F, and G to Lighting Study)

Sumner High School Master Plan Landscape Plan, dated February 1, 2021, prepared by Weisman Design Group Sumner High School Master Plan Project Construction Sequencing Plan with Narrative Description, detailing Phase I and Phase 2, dated February 1, 2020, prepared by Matthew Guilanians, Project Manager, Hainline & Associates Sumner High School Master Plan Stormwater System Plan, dated February 1, 2021, prepared by AHBL Engineers with associated Memorandum prepared by AHBL Engineers Sumner High School Master Plan Water System Plan, dated February 1, 2021, prepared by AHBL Engineers with associated Memorandum prepared by AHBL Engineers

Sumner High School Master Plan Sewer System Plan, dated February 1, 2021, prepared by AHBL Engineers with associated Memorandum prepared by AHBL Engineers

Sumner High School Master Plan Right-of-Way Improvements Plan with Bulb Out Detail, dated as of February 1, 2021 Sumner High School Master Plan ROW/Deed Conveyances Map, dated January 30, 2021 Code Compliance Site Plan, dated April 14, 2020 Sumner High School Master Plan (Phase 1) Interior Floor Plans, dated October 30, 2019, prepared by BLRB Architects Sumner High School Master Plan (Phase 2) Interior Floor Plans, dated October 30, 2019, and November 13, 2019, prepared by BLRB Architects

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.

There are no pending applications for any governmental approvals from other proposals affecting the property.

10. List any government approvals or permits that will be needed for your proposal, if known. City of Sumner Master Plan Level Related-Approvals

• Major Amendment to Conditional Use Permit (PLN-2018-0015) to permit Master Plan


• Development Agreement with City of Sumner for Master Plan • Special Height Exception for Master Plan • Right-of-Way Vacations/Deed Conveyances Phase 1 and Phase 2, as Separate Permits* • Building Permit • Site Development Permits (civil set, includes on-site work and off-site: right-of-way and street lighting) • Landscape Plans • Mechanical Permit • Fire Sprinkler Permit • Electrical Permit

• Demolition Permits for existing Sumner High School (including swimming pool and greenhouse building) as part of Phase 2 only

• Tacoma Pierce County Health Department (school and food service review) *Development Agreement with City of Sumner will also address the Permits Washington State Department of Ecology

• NPDES Permit, separate permits for Phase 1 and Phase 2

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.)

The District proposes to construct a modernized and expanded Sumner High School under a Phased Master Plan which would fully buildout a replacement High School, including athletic facilities (except for Sunset Chevrolet). The replacement High School will be constructed on approximately 29.49 acres consisting of its existing campus and abutting parcels on Wood Avenue and Mason Street. Except for Sunset Chevrolet Stadium and its associated structures and parking lot, all of the buildings and fields of the existing High School campus will be demolished sequentially as part of Phase 2 in accordance with the Construction Sequencing Plan.

The modernized and expanded Sumner High School will house 1830 students and 150 staff within 334,614 total square feet in three main structures together with athletic facilities, all proposed to be built in two phases. The completed replacement Sumner High School will provide state-of-the art academic, technology-supported, visual and performing arts, and career-oriented programs to provide for interdisciplinary studies, collaborative learning, innovative teaching methods, and , and enhanced athletic facilities resources to continue the legacy of excellence and commitment to the community it serves.

PHASE 1

Phase 1 will be a single structure (the “Phase 1 Building”) containing 85,761 sq. ft. to house 1830 students and 150 staff. The Phase 1 Building will implement the 2016 Capital Bond goals and consists


of a three-story structure with 18 classrooms, a Commons/cafeteria with outdoor courtyard, library, kitchen, secured vestibule, administrative and support services, technology upgrades, service yard with trash enclosures, walled emergency generator, loading dock, and central mechanical rooms. The Phase 1 Building will be located in the grassed area west of the existing parking lot known as the “West Parking Lot” and extend northerly to Mason Street. Phase 1 will be connected to the existing High School building via a walkway to be centrally located within the existing “West Parking Lot”. The walkway will be separated from the parking stalls to provide safety of students and staff. The existing High School will continue to serve the students and staff as full buildout of the replacement High School continues as part of Phase 2.

During construction of Phase 1, there will be a total minimum parking count of 400 stalls. The school bus load and unload area will be re-located from Main Street to Mason Street along the District-owned properties. School busses will exhibit from Mason Street to Washington Street through the existing the alley (to be vacated) abutting the existing area known as the “North Parking Lot”. As part of Phase 1, the special education busses will continue to load and unload in the “West Parking Lot”. Street trees and new sidewalks on Mason Street (to the westerly terminus of the existing tennis courts) will be installed. Crosswalks at Main/Meade and Main/Meeker with bulb outs will be constructed. Upon occupancy of the Phase 1 Building, all portables on the Project Site (in the area known as the “North Parking Lot”) will be removed and 590 parking stalls will be available for on-site parking. No structures will be demolished in Phase 1.

PHASE 2 Phase 2 will consist of:

(i) A three-story structure (the “West Building”) housing 42 classrooms, day care, career and technical education (CTE) with an associated 2,100 sq. ft. greenhouse and a 1,500 sq. ft. animal sciences building to temporarily house animals with a covered pen area. The animal sciences program may include housing the following animals during varying time periods:

• One horse (1-2 days) • Canines: (1 day) • Rabbits: (2-4 weeks) • Chickens and chicks (2-6 weeks) • Lambs (3-4) between January to mid-April

The West Building will be connected to the Phase 1 building on all levels through an east-west, clerestory-enclosed corridor. Upon occupancy of the West Building, the special education busses will load and unload along the West Building and will exit onto Wood Avenue.

(ii) A one-story and two-story combined structure (the “East Building”) consisting of administration and student services, faculty lounge, visual arts, music, choir, and band, performing arts, main and auxiliary gymnasiums, locker rooms and a pool (subject to review by a future Facilities Steering Committee to be convened by the District as part of a future capital bond). The East Building has a shared wall with the eastern face of the Phase 1 Building.

(iii) A new lighted, synthetic turfed Multi-Use Field with associated storage buildings, concessions and restrooms, and spectator seating to accommodate baseball, softball, fast pitch, soccer, lacrosse, and other athletic and recreational activities to serve students and the community. The Multi-Use Field will be lit with a state-of-the art, technologically advanced and heavily shielded,


full-cut off LED lighting system equipped with external, extended visors, where appropriate, on eleven (11) 60’, 70’, and 80’ poles which allows the luminaires to be aimed to the area to be lit which minimizes any light spillage, glare, or sky glow on adjacent properties. The Multi-Use Field will be surrounded by a 10’ chain link fence with a 30’ netting as measured from the ground level except in the area of the backstop which will include a 30’ chain link back stop fence.

(iii) Eight, lighted tennis courts with associated seating. The tennis courts will be lit with a state-of-the art, technologically advanced and heavily shielded, full-cut off LED lighting system equipped with external, extended visors on six (6) 50’ poles to minimize any light spillage, glare, or sky glow on adjacent properties. The tennis courts will be surrounded by a 10’ chain link fence with a 30’ netting as measured from the ground level.

(iv) A new expanded, competition level pool (subject to review by a Facilities Steering Committee to be convened by the District in conjunction with a future capital bond for Phase 2).

(v) Not less than 688 parking stalls in three lots described as: the “Wood Avenue Parking Lot”, the “Main Parking Lot” and the existing “Elhi Hill”/”Meeker Avenue Parking Lot”. The addition of not less than 224 parking stalls (from the existing 464 parking stalls) accessible to student, staff, and visitor entrances would represent in excess of a 50% increase in off-street parking supply providing for school-related demand and will accommodate more of the event-related demand with the centralized location adjacent to the athletic facilities and is expected to reduce parking demand impacts from events on the surrounding on-street parking supply. (vi) Crosswalks at Main/Bonney and Main/Lewis with bulb outs will be constructed and a crosswalks at Valley and Washington and mid-block at Valley at Fred Meyer will be constructed.

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.


SUMNER HIGH SCHOOL: 1707 MAIN STREET (PARCEL NO. 0420244205) REVISED PARCEL J, MAIN STREET PLAZA BOUNDARY LINE ADJUSTMENT, RECORDED UNDER RECORDING NO. 9511090682, IN PIERCE COUNTY, WASHINGTON; EXCEPT ANY PORTION OF THE ABOVE DESCRIBED PARCEL LYING WITHIN PROPERTY AS CONVEYED TO THE CITY OF SUMNER BY DEED RECORDED UNDER RECORDING NO. 9403110330.

PROPOSED WOOD AVENUE PARKING LOT: 1101 AND 1111 WOOD AVENUE (PARCEL NOS. 4445000010 AND 4445000020) LOTS 1-3, BLOCK 1, HENTON'S ADDITION TO THE TOWN OF SUMNER, ACCORDING TO THE PLAT THEREOF RECORDED IN VOLUME 2 OF PLATS, PAGE 79, RECORDS OF PIERCE COUNTY, WASHINGTON.

MASON STREET PARCELS INCORPORATED INTO MASTER PLAN: 1412-1506 MASON STREET (PARCEL NOS. 4445000030, 4445000040, 4445000050, 4445000060, 4445000070, 4445000080, 4445000090, 4445000100, AND 4445000110) LOTS 4 THROUGH 13, BLOCK 1, HENTON'S ADDITION TO THE TOWN OF SUMNER, ACCORDING TO THE PLAT RECORDED IN VOLUME 2 OF PLATS AT PAGE 79, RECORDS OF PIERCE COUNTY, WASHINGTON.

ELHI HILL/MEEKER AVENUE PARKING LOT: 1518 MAIN STREET AND 914 AND 908 MEEKER AVENUE (PARCEL NOS. 2350000060, 2350000100 AND 2350000110) LOTS 8 AND 9, BLOCK 2, BAUMBACH AND SOWDER'S ADDITION TO THE CITY OF SUMNER, ACCORDING TO PLAT RECORDED IN BOOK 13 OF PLATS AT PAGE 92, IN PIERCE COUNTY, WASHINGTON.

1. Earth a. General description of the site: (circle one): Flat, rolling, hilly, steep slopes, mountainous, other _____________ b. What is the steepest slope on the site (approximate percent slope)?

The Master Plan Site generally slopes from west to east, matching existing grade at the track and continues sloping downwards to the existing fields on Valley and Washington. The steepest slope is located on the existing High School site between the existing High School building and the existing track which is approximately 33%.

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.

The Natural Resources Conservation Service (NRCS) Soil Survey for Pierce County classifies the soils within the eastern half of the Project Site as Puyallup fine sandy loam and the western half of the Project Site as Sultan silt loam. Geotechnical investigations of the Project Site in 1981, 1991, 2018, and 2019 show soil conditions consist of sequential layers of find sand and silty sand in a loose to medium dense condition interspersed with layers of sandy silt, clayey silt, and peat.

d. Are there surface indications or history of unstable soils in the immediate vicinity? If

so, describe.


Geotechnical investigations at the existing High School campus reveal that groundwater is encountered at about three (3) feet below the ground surface and may rise to with one (1) foot of the ground surface during extended periods of wet weather. The High School site has high susceptibility to liquefaction. All structural elements of the Master Plan Project will be supported on deep foundations in the nature of augercast piles installed to depths of approximately 100 feet. Pavement sections are amenable to soil-support improvements.

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.

The topographic relief of the Project Site is relatively flat and as such fill will be proposed. Fill material will be imported to fill the area of the existing swimming pool to be demolished as part of the Project. Excavations will be performed in association with utilities, footings, and new hardscapes, including utilities and hardscape. Several stormwater flow control systems will be installed for both Phase 1 and Phase 2 of the Master Plan requiring excavation and removal of existing soils. Pavement subgrades will require overexcavation and replacement with structural fill. Grading will be limited to fine grading of pavements and courtyards. Roughly 3,000 cubic yards of cut and 25,000 cubic yards of fill is anticipated for the Master Plan Project.

f. Could erosion occur as a result of clearing, construction, or use? If so, generally

describe.

For Phase 1 of the Master Plan Project, Best Management Practices (BMPs) will be followed in accordance with the requirements of the 2012 Washington State Department of Ecology (DOE) Stormwater Management Manual, as amended by the 2014 amendments, for Western Washington, as adopted by the City of the Sumner.

For Phase 2 of the Master Plan Project, BMPs consistent with the 2019 DOE Stormwater Management Manual for Western Washington will be implemented.

With adoption of these standards by the District during construction of the phased Master Plan Project, erosion is anticipated to be minimized.

To protect soil from erosion, the following BMPs will be implemented:

• All disturbed areas that will remain unworked will be stabilized with temporary hydroseed within two days (between October 1 – March 31) or seven days (between April 1 – September 30).

• All areas that will not be impacted by construction will be seeded. • Topsoil stockpiles will be stabilized with plastic coverings. • Dust control will be provided by sprinkling the Site with water, as necessary. • Permanent erosion control measures will include Site paving and seeding of exposed

soils. g. About what percent of the site will be covered with impervious surfaces after project

construction (for example, asphalt or buildings)?


Approximately 70% of the Master Plan Project Site will be covered with impervious surfaces after construction.

h. Proposed measures to reduce or control erosion, or other impacts to the earth, if

any:

As indicated, a properly developed, constructed and maintained temporary erosion control plan, consistent with the City of Sumner Stormwater Management requirements and Washington Department of Ecology best management practices will be implemented with the Project. The Stormwater Plan will include silt fencing and perimeter runoff protection, catch basin protection, and temporary sedimentation controls which may include: intercepting and diverting any potential sources of surface or near-surface water within the construction zones before stripping begins, de-watering with an internal system of ditches, sump holes, and pumps, and properly includes cut slopes to prevent sloughing and collapse. Streets will be swept and cleaned in the event sediment is tracked off-site. Wheel washing stations will be installed where appropriate.

2. Air 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.

Construction of the proposed Master Plan Project would result in temporary increases in emissions related to construction equipment and activities. Because any such emissions would be controlled through implementation of best management practices and be limited in duration, they would be unlikely to result in any significant impacts to air quality.

The Master Plan Project would result in emissions related to some of the school buses (smaller special education buses) and vehicles traveling on-site to school or for drop-off and pick-up of students on Mason Street. The school buses and other vehicles are comprised of gasoline and diesel-fueled vehicles. Upon arrival at the bus load and unload area on Mason Street, the school buses will be required, as an Operating Procedure, to turn off their engines until departure. The potential air quality impacts are expected to be less than significant due to the short travel duration on-site at the High School. In addition, over time District school buses have been replaced and will continue to be replaced with new, lower-emitting vehicles.

The Transportation Technical Report for the Master Plan Project indicates that traffic increases due to the Master Plan Project would result in very minimal increases in delay at study area intersections and that the increase in traffic arising from the Master Plan Project is not significant and would continue to comply with National Ambient Air Quality Standards (the Project area is considered in attainment for all air pollutants). Therefore, potential air quality impacts from increases in off-site traffic are expected to be less than significant.

The proposed emergency generator for the High School would be operated for short periods at regular intervals (e.g., once a month for a duration of one hour) to ensure the generator remains in good operating condition. Other than for maintenance, the generator would only be operated during


a power outage. An air quality permit would not be required for the generator due to its small size (less than 500 HP) and limited hours of operation.

b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe.

The District is not aware of any off-site sources of emissions or odors that may affect the Revised Project.

c. Proposed measures to reduce or control emissions or other impacts to air, if any:

During Site preparation under both Phases of the Master Plan, clearing and grading, disturbed areas will be watered if necessary to control dust. Vehicles, trucks, and equipment not in use during construction will remain shut off to the extent reasonably possible. Commencing with the operation of Phase 1, the school buses will turn off their engines upon arrival and will remain off until departure, thereby reducing idling times and emissions. The District will continue to replace busses with new, lower-emitting vehicles. The District’s existing Wood Avenue parking lot contains electrical charging stationing units to encourage general public use of low emission vehicles.

3. Water 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.

There are no surface water bodies in the immediate vicinity of the Site.

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.

Not applicable.

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.

Not applicable.

4) Will the proposal require surface water withdrawals or diversions? Give general

description, purpose, and approximate quantities if known. No.

5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan.


According to FEMA Flood Map Panel 53053C0353E, the Site is outside the 100 year floodplain.

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.

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.

Municipal water is supplied by the City of Sumner to the Master Plan Project. Wastewater will not be discharged to groundwater and will be discharged to the existing sanitary sewer for the Master Plan Project.

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.

There are no known or proposed waste materials that will be discharged into the ground within the Project Site.

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.

Stormwater collection for the Master Plan Project is divided into three defined areas as shown on the Sumner High School Master Plan Stormwater System Plan, dated February 1, 2020, prepared by AHBL Engineers. Construction of the system for the Revised Project is sequenced into four (4) steps as shown on the Stormwater System Plan:

• Phase 1 Construction • Phase 2 West Building • Wood Avenue Parking Lot • Full Buildout Area

All on-site stormwater systems are designed to use detention pipe in conjunction with storm pump systems and water quality filter vaults. The pump systems, comprised of multiple pumps sized to


accommodate the flow in accordance with applicable standards as described herein, will discharge stormwater to existing conveyance systems within the adjacent public rights-of-way. Timing for construction of the stormwater systems within these stormwater basins and their pumping requirements are as described:

Under Phase 1 Construction:

Phase 1 and West Building Area of Stormwater System Plan The Phase 1 Building as shown on the Stormwater System Plan will require a separate detention system. It is designed to be expanded to include the Phase 2 West Building detention requirements when the Phase 2 West Building is constructed. This drainage basin is required to meet the flow duration standards of the Department of Ecology 2012 Stormwater Management Manual for Western Washington as Amended in December 2014 (“2014 SWMMWW”), as adopted by the City of Sumner, matching the existing flow rates from 50% of the 2-year to the 50-year peak flow. Runoff will be detained as specified by Minimum Requirement #7 and Volume III of the 2014 SWMMWW. A detention system of approximately 20,600 cubic feet is required for the Phase 1 construction of this sub-basin. Under Phase 2 Construction

Phase 2 West Building Area of Stormwater System Plan The Phase 2 West Building will be tied into the Phase 1 detention system. Stormwater collection for the Phase 2 West Building is designed to Ecology’s 2019 Stormwater Management Manual for Western Washington (2019 SWMMWW). The detention system will be expanded by 13,400 cubic feet for a total 34,000 cubic feet required for this sub-basin.

Wood Avenue Parking Lot Area of Stormwater System Plan The Wood Avenue Parking Lot at the intersection of Mason and Wood Avenue is designed as a separate drainage basin than the rest of the Project Site. This drainage basin discharges to the valley of Sumner and is flow-controlled per the Valley Flow Control Standard as currently adopted by the City of Sumner. Runoff is required to be detained to match existing Site peak discharge rates for existing conditions for the 2-year and 10-year storms. A detention system of approximately 10,700 cubic feet is required for this sub-basin. Full Buildout Area of Stormwater System Plan The Full Buildout Area will meet the flow control duration standard in accordance with the 2019 SWMMWW Minimum Requirement #7 and Volume III – Hydrologic Analysis and Flow Control Design/BMPs. In accordance with standard practices, synthetic turf fields are modeled as 50% pervious, 50% impervious for this sub-basin. A detention system of approximately 152,730 cubic feet is required for this sub-basin.

Water quality for the Master Plan Project will be provided at enhanced treatment levels per the 2014 SWMMWW relating to Phase 1 Construction. For the Phase 2 Construction Areas, water quality for the Project will be provided at enhanced treatment per the 2019 SWMMWW. To provide treatment, underground filter-vault treatment devices will be installed for each detention system so that runoff from pollution-generating surfaces is treated prior to discharge to the existing City stormwater system. Discharged stormwater from the synthetic turf fields will also be treated. The more restrictive 2019 SWMMWW requirement of 15-minute time steps were used for the hydrologic analyses for both Phase 1 and Phase 2 construction.


2) Could waste materials enter ground or surface waters? If so, generally describe.

For Phase 1 of the Master Plan Project, Best Management Practices (BMPs) will be followed in accordance with the requirements of the 2012 Washington State Department of Ecology (DOE) Stormwater Management Manual, as amended by the 2014 amendments, for Western Washington, as adopted by the City of the Sumner. For Phase 2 construction of the Master Plan Project, BMPs consistent with the 2019 DOE Stormwater Management Manual for Western Washington (SWMMWW) will be implemented. With adoption and implementation of these Best Management Practices, any waste materials will be prevented from entering ground or surface waters.

3) Does the proposal alter or otherwise affect drainage patterns in the vicinity of the

site? If so, describe.

The Revised Proposal will not alter the existing drainage patterns. d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any:

Best Management Practices for Phase 1, as required by applicable City of Sumner and 2012 Washington State DOE Stormwater Management Manual, as amended by the 2014 DOE amendments, and Best Management Practices for Phase 2, as required under the 2019 DOE SWMMWW are proposed to reduce and control surface runoff. As indicated, stormwater will be treated, detained, and released at controlled rates to discharge to the City stormwater system.

4. Plants

a. Check the types of vegetation found on the site:

X 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 ____other types of vegetation

b. What kind and amount of vegetation will be removed or altered? c. List threatened and endangered species known to be on or near the site.


None known.

d. Proposed landscaping, use of native plants, or other measures to preserve or

enhance vegetation on the site, if any:

Landscaping, as shown on the Landscape Plans, dated February 1, 2021, prepared by Weisman Design Group, will be installed. New planted landscape areas will be provided at required perimeter buffers, parking lot islands (1 island per 10 stalls) and in certain areas around the building and in student plazas. The planting palette for the new shrub areas will consist of a mixture of evergreen and deciduous shrubs and trees including native and adapted species such as Kelsey Dogwoods, Oregon Grape, Hogan Cedars and a variety of deciduous shade trees. New ornamental lawns will be installed in large, courtyard spaces and areas around the building. The Main Entrance Plaza and frontage along Main Street will have new trees and plantings for an attractive streetscape appearance.

Phase 1 landscaping will consist of installation of street trees 60’ on center in the back of sidewalk along the Revised Project’s frontage on Mason Street to the westerly terminus of the existing tennis courts. Thuja Greenscape trees also will be installed along the drive aisle from the cul-de-sac on Mason Street exiting onto Washington Avenue (on the west boundary of the Multi-Use Field). Hydroseeding of the Phase I construction staging areas along Mason Street will occur at the conclusion of Phase I.

With Phase 2, street trees 60’ on centers in the back of sidewalk will be installed along Main Street and the remainder of Mason Street together with all other interior areas of landscaping with hardscape in accordance with the Landscape Plan. The existing street trees along Wood Avenue and Valley Avenue (except two existing trees to be removed associated with installation of new driveway onto Valley Avenue) are all maintained. Parking lots will include one landscape island per 10 parking stalls.

e. List all noxious weeds and invasive species known to be on or near the site.

None known. 5. Animals 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.

Examples include: birds: hawk, heron, eagle, songbirds, other: mammals: deer, bear, elk, beaver, other: fish: bass, salmon, trout, herring, shellfish, other ________ b. List any threatened and endangered species known to be on or near the site.

http://www.ecy.wa.gov/programs/sea/sepa/ChecklistGuidance.html#Animals


None known. c. Is the site part of a migration route? If so, explain.

The Master Plan Project Site is located within the Pacific Flyway, a north/south route used by migratory bird species travelling between Alaska and South America.

d. Proposed measures to preserve or enhance wildlife, if any:

The Master Plan Project Site is a developed urban site. However, native plants proposed with the Landscaping Plan will provide habitat areas for birds and small wildlife.

e. List any invasive animal species known to be on or near the site.

There are no invasive animal species known to be on or near the Master Plan Project Site. 6. Energy and Natural Resources 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.

Electricity and natural gas services will be used to satisfy energy needs for the Master Plan Project for domestic water supply, building heating, and cooling. A new electric service at the adjacent to the intersection of Mason and Wood will be installed to energize the building and lighting systems. A new natural gas service off of Mason Street will be installed to fuel the mechanical systems.

b. Would your project affect the potential use of solar energy by adjacent properties?

If so, generally describe.

A Shadow Analysis Study, dated February 1, 2021 prepared by BLRB Architects, establishes that the locations of the buildings proposed under the Master Plan will not cross the plane of the properties located on the north side of Mason Street. This Shadow Analysis also demonstrates that the solar access provisions under the Sumner Municipal Code (SMC 18.32.030) do not impact the Revised Project because the shadows do not cross the back-of-sidewalk running east-to-west on the northly side of Mason Street. Therefore, the shadows remain in the “unbuildable areas” as defined by SMC 18.32.030.

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:

The replacement of Sumner High School under the Master Plan will be constructed consistent with the Washington Sustainable School Protocol (“WSSP”). The purpose of the WSSP is to implement


the goals of RCW ch. 39.35 (high-performance standards for public buildings) to provide conservation measures to reduce energy consumption and achieve environmental qualities.

Energy conservation measures incorporated into the design of the Master Plan include:

a. Two and three-story portions of the building to minimize building footprint b. Energy efficient HVAC equipment c. Energy management system for HVAC system and lighting system controls d. Daylight responsive lighting controls e. Lighting system occupancy sensors f. Low energy LED light fixtures g. Building system commissioning h. Enhanced exterior envelope insulation i. Sun-control insulated glass exterior windows j. Thermal break exterior window framing systems k. Continuous air barrier to reduce infiltration to meet requirements of the applicable Washington

State Energy Code at the time of permitting of Phase I and Phase 2 of the Master Plan. l. Other resource conservation features

i. Irrigation system automatic water reduction controls ii. Low flow sinks and toilet fixtures iii. Building-wide waste recycling program iv. Food compost program v. Energy Star rated appliances and equipment.

In addition, as required under WSSP, there will be post-occupancy evaluation to confirm

performance standards and procedures. 7. Environmental Health 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.

1) Describe any known or possible contamination at the site from present or past

uses. In conjunction with the Original SEPA Proposal, the District, engaged the services of a qualified environmental consultant and licensed hydrogeologist with AMEC (and then later with Shannon & Wilson) to obtain a no further action (NFA) associated with then Ecology listing of three (3) leading underground storage tanks that were removed in the 1990s on the High School campus. The District also engaged the same environmental consultant to perform due diligence environmental investigation, including evaluation of Ecology and Tacoma-Pierce County Health Department (TPCHD) records as part of a Phase 1 Environmental Assessment, in conjunction with the District’s acquisition of all eleven (11) parcels on Wood Avenue and Mason Street abutting the High School campus (part of the Master Plan Project) as well as the three (3) parcels comprising the Elhi Hill Program/Meeker Avenue Parking Lot. An NFA was obtained for the existing High School campus and the environmental due diligence and evaluations of: (i) the


abutting acquired parcels (under the Master Plan Project) established no recognized environmental concern, and (ii) evaluation of the adjacent off-site parcels, described below, demonstrate that are no adverse impacts to the Revised Proposal (the Master Plan Project). SUMNER HIGH SCHOOL CAMPUS (TPCHD Reference - LUST: Cleanup Identification (ID): 4190, Facility ID: 98759533, LUST ID: 6981, UST ID: 389) The existing High School site (1707 Main Street) received a no further action (NFA) determination from the Washington State Department of Ecology (Ecology) in 2018. The NFA is associated with three (3) LUSTs removed in the 1990s that were in the existing front entry courtyard area. The three USTs were removed in December 1992 and February 1993. During removal of one of the USTs, a hole was observed in the base and diesel-range hydrocarbon contaminated soil was identified. The contaminated soil was removed, and confirmation soil samples were below the Model Toxics Control Act (MTCA) cleanup requirements for diesel-range hydrocarbons. Hydrocarbons were observed on groundwater in the excavation. A grab groundwater sample contained diesel-range hydrocarbons above the MTCA cleanup requirements. In 1995, four (4) groundwater monitoring wells were installed around the perimeter of the High School building that surrounded the courtyard area where the USTs had been located. Groundwater in the monitoring wells was sampled and analyzed for four consecutive quarters. Testing of the groundwater established that diesel-range hydrocarbons were not present in each of the four quarter sampling events. The groundwater analytical results from each quarter of sampling were reviewed by TPCHD staff. TPCHD sent a letter to the District, dated June 25, 1996, stating that no further investigation or action associated with the former USTs was required and that the groundwater monitoring wells could be decommissioned. The groundwater monitoring wells were decommissioned on August 12, 1996. Additional investigation work in conjunction with the Original SEPA Proposal was undertaken in the vicinity of the former USTs excavation in September 2017. Soil and groundwater samples were analyzed for hydrocarbons and waste oil-related compounds such as polycyclic aromatic hydrocarbons, metals, and volatile organic compounds. None of the compounds were detected in the analyzed samples. A detailed report with the results, prepared by Shannon & Wilson, dated November 6, 2017, was submitted to Ecology along with a request to remove the property from Ecology’s LUST database. After review of the 2017 report, Ecology issued the NFA determination for the Sumner High School campus and removed the site from the LUST database. HERITAGE BANK (FORMER JOHNSON CHEVRON) (TPCHD Reference - LUST: Cleanup ID: 7068, Facility ID: 19823276, LUST ID: 6223, 2056, UST ID: 6995) A former gas station (known as Johnson Chevron) operated at the intersection of Wood Avenue and Main Street) 1005 Wood Avenue, Sumner, Washington. This property is now occupied by Heritage Bank and is approximately 40 feet east of the Revised Project’s western expansion area. Johnson Chevron is listed on Ecology’s LUST database and the site status is that an


independent cleanup has started. Johnson Chevron was a gas station and vehicle repair facility from approximately the mid-1940s until approximately 2006. In December 1991, five (5) USTs located in the northern portion of this property were removed, and soil in the excavation contained gasoline-range hydrocarbon and benzene concentrations above the MTCA cleanup levels. The contaminated soil was removed in 1992 and confirmation sample concentrations were below the MTCA cleanup level. Groundwater concentrations were also below the MTCA cleanup levels. In 1992, two (2) new USTs were placed in the excavation. In 1997, TPCHD attempted to track all the documents for the above remediation activities and closed the file on the UST excavations and associated soil removal project. In 2006, the Johnson Chevron site was investigated for the potential purchaser, Heritage Bank (the current owner). At that time, thirty-one (31) soil borings and six (6) groundwater monitoring wells were installed on the site. The soil borings were distributed across the property. During the investigation, gasoline-range hydrocarbon and benzene, toluene, ethylbenzene, and xylenes were found above MTCA cleanup levels in soil in the south portion of the property at the location of historic gas pumps. Three (3) closed-in-place USTs, believed to be older than the USTs that were removed in 1991, were discovered within the south area and removed in 2006. Contamination around the USTs was overexcavated and confirmation soil samples were below the MTCA cleanup levels. Oxygen releasing compound was placed in the base of the excavation after contaminated soil had been removed. In advance of construction of the Heritage Bank in 2007, the gas station buildings on the property were demolished, and hydraulic hoists, the two 1992 installed northern USTs, and a heating oil UST were removed. Contaminated soil associated with the two northern USTs and heating oil tank was removed and soil confirmation samples were below MTCA cleanup levels. Testing verified that no soil contamination was noted associated with the two hydraulic hoists, the northern gasoline piping, and gas pumps. Seven (7) groundwater monitoring wells were installed and sampled for hydrocarbon-related chemicals over five consecutive quarters starting in February 2007. Groundwater sampling results were either non-detect or below MTCA cleanup levels for hydrocarbon-related chemicals in all events except for lead. Lead was detected above the MTCA cleanup level during the first sampling event in monitoring well MW-7 (no other exceedances of lead occurred). During the final monitoring event, only monitoring well MW-7 was tested for lead. The groundwater sampling events demonstrated that hydrocarbon-related chemicals required to be tested under MTCA regulations for gasoline containing USTs (Washington Administrative Code 173-340-990, Table 830-1, “Required Testing for Petroleum Releases”) were below the cleanup levels for four consecutive quarters. Based on review of the records, there is documentation that the soil contamination associated with the USTs at the Johnson Chevron site has been overexcavated. The testing results demonstrate that soil contamination was limited to within the property boundary, and soil concentrations were below MTCA cleanup levels in the heating oil UST excavation closest to the Sumner High School campus. Therefore, the likelihood that hydrocarbon contamination associated with the Johnson Chevron site has impacted the soil at the Sumner High School property is very low.


Groundwater flow was documented to be towards the west-southwest, away from the Sumner High School campus, and four quarters of groundwater sampling demonstrated that concentrations of hydrocarbons and related compounds were below MTCA cleanup levels. Therefore, groundwater contamination associated with the Johnson Chevron site is unlikely to impact the Sumner High School campus. DAY & NIGHT GROCERY (TPCHD Reference - LUST: Cleanup ID: 6218, Facility ID: 52392315, LUST ID: 1573, UST ID: 10226)) The Day & Night Grocery operated at 1313 Main Street, Sumner, to the west of the Sumner High School campus and received an NFA determination from Ecology in 2010. The property was used as a grocery store with an associated gas station. The gas station was present between 1964 to approximately 1990. In 1990, four (4) USTs were removed, and contaminated soil was overexcavated. Some of the confirmation soil samples did not meet the MTCA cleanup levels and in 2008 additional soil was removed. In 2008, soil confirmation samples were below MTCA cleanup levels. Four (4) monitoring wells were installed in 1990, and an additional one (1) monitoring well was installed in 2008. The groundwater gradient was measured to be to the northwest away from the Sumner High School campus. Groundwater concentration from the monitoring wells were below the MTCA cleanup levels for four consecutive quarters and Ecology issued an NFA determination based on the work undertaken. SUMNER AUTO REPAIR (TPCHD Reference - LUST: Cleanup ID: 883, Facility ID: 3501054, LUST ID: 107, UST ID: 2921) The Sumner Auto Repair is also known as Petrosave and has a property address of 15006 East Main Street, Sumner. The site in the southeast corner of the intersection of Main Street and Valley Avenue and south and east of the Sumner High School campus. Sumner Auto Repair is in Ecology’s Voluntary Cleanup Program and the most recent environmental site activity was in 2016 based on submitted documentation in Ecology’s online repository. A gas station and automotive repair business operated on the property from the mid-1930s until the late 1980s. Seven (7) USTs were reported to have removed between 1988 and 2006 (four in 1988/1989, one in 2003, and two in 2006). During the UST removals, contaminated soil associated with the USTs was reported to have been excavated and disposed offsite. Contaminated groundwater on the property was addressed with a remediation system installed in 2006 and removed in 2007. Further investigation in 2008 identified the lateral and vertical extent of residual hydrocarbon impacts and it was reported that contaminated soil was limited to the northwest corner of the property and within the adjacent City of Sumner streets (Valley Avenue and Main Street). Groundwater sampling was conducted in April 2008 and MTCA cleanup levels were exceeded in the northwest area of the property, but were below MTCA cleanup levels in monitoring wells located west and northwest of Valley Avenue and Main Street, respectively. The groundwater gradient is not provided, but based investigation on other sites in the area it is likely to be to the


west, southwest, or northwest. The groundwater was monitored again in September 2008, April 2016, and August 2016. The results from the three (3) groundwater monitoring events were below MTCA cleanup levels in all five wells that were sampled. The available reports detail that soil contamination appears to be limited to the Sumner Auto Repair property and the immediately adjacent streets and groundwater concentrations have not been above MTCA cleanup levels since April 2008. Although the groundwater gradient could be northwest in the direction of the Sumner High School campus, a monitoring well (MW-5) is located northwest from the Sumner Auto Repair property (at the northeast corner of Valley Avenue and Main Street). The groundwater in MW-5 was monitored during all four events in 2008 and 2016 and the groundwater concentrations were below the MTCA cleanup levels. Consequently, the likelihood that soil or groundwater contamination at the Sumner Auto Repair site is impacting the Sumner High School campus is low although hydrocarbon odor may be noted if excavation were to occur in the southeast corner of the High School property. However, under the Master Plan Project, no excavation is planned within the southeast corner. No part of the Revised Project is located within the southeastern portion of the High School Campus near Valley Avenue and Main Street.

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.

The District is not aware of any hazardous situation that might affect the Project development and design. Existing natural gas and electrical services are located within the public right-of-way.

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.

Common cleaning and supply products will be used and will be properly stored on the proposed replacement High School Master Plan Project. Use of toxic or hazardous chemicals are not anticipated to be used in connection with construction of the Master Plan Project. Common chemicals associated with high school science instruction will be used and the District has existing protocols for the handling of such materials. Best management practices will be followed with respect to equipment used during construction of the Master Plan Project.

4) Describe special emergency services that might be required.

It is not anticipated that any special emergency services will be required beyond what may be customary for an existing High School and athletic activities.

5) Proposed measures to reduce or control environmental health hazards, if any:

All applicable federal, state and local regulations governing the storage, maintenance, use and


disposal of any common products or equipment containing chemicals will be followed.

b. Noise

This section presents a summary of noise-related information for the Master Plan Project; see the Noise Study, dated February 12, 2021, prepared by Ramboll US Corporation attached hereto for a complete and detailed description of the noise-related information and evaluation.

1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)?

The most consistent, dominant existing noise source in the vicinity of the Master Plan Project is traffic public right-of-ways. Other noise sources include school-related noises, uses associated with retail uses and shopping centers, people, animals, and birds. Existing noise will not affect the Master Plan Project.

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)? Indicate what hours noise would come from the site.

SHORT-TERM CONSTRUCTION/SITE PREPARATION NOISE On a short term basis, noise may be emitted from heavy equipment used during construction of the Master Plan Project. Construction noise is exempt from the City of Sumner’s environmental noise regulations (SMC 8.14.080) when limited to 7 AM to 6 PM weekdays and 10 AM to 6 PM weekends and holidays and construction activities will be limited to hours, except as otherwise may be authorized by City (SMC 15.34.010). The temporary nature of the construction coupled with Sumner Code compliance and best management practices will reduce any potential noise impacts to be less than significant.

LONG-TERM OPERATIONAL NOISE The proposed Master Plan Project could result in changes to the operation of existing noise sources that could affect the surrounding community, including on-site traffic, placement of cooling equipment, an emergency generator and the pool condenser unit, activities associated with the Multi-Use Field and use of a Public Address System.

On-site traffic would include school buses accessing and traveling on the site. Noise from on-site buses during the AM arrival (7:00-7:45 a.m.) and PM departure (2:10-2:30 p.m.) is expected to comply with the noise limits applicable during daytime hours (i.e., 55 dBA at the nearest residential properties). Morning arrival of students is expected to result in increases up to 2 dBA at the nearest residences; increases up to 3 dBA are expected to be barely noticeable.

Cooling System Three air-cooled chillers will provide cooling for the school buildings (Phase 1 and Phase 2). The chillers will be located on the roof of the kitchen area of the Phase 1 building surrounded by 12 acoustic panels. In compliance with the District’s Energy Use Policy, the cooling system would be set to achieve occupied temperature no earlier than 60 minutes prior to occupied time. With a start


time of 7:25 AM, operation of the cooling system may be required between 6 and 7 AM, considered nighttime hours when applying the noise limits. The model-calculated sound levels of the operation of the chillers are 42 dBA or less at all nearby residential properties which would comply with the stricter nighttime noise limit of 45 dBA and result in virtually no increase over existing sound levels.

Emergency Generator The new emergency generator would provide power to the High School during a power outage. The emergency generator would be located in the service area on Mason Street surrounded by a 10-foot high masonry wall. The emergency generator would be tested/operated occasionally (e.g., once a month) for up to an hour to ensure that it remains in good working condition. Testing would be limited to daytime hours only. Although noise from emergency operation of the generator would be exempt from the noise limits, noise from testing of the generator would be subject to the daytime noise limits. Model-calculated sound levels based upon a worst-case scenario with the operation of the chillers in conjunction with testing of the emergency generator are 48 dBA or less at all nearby properties. These levels would comply with the daytime noise limit of 55 dBA and result in up to a 4 dBA increase over existing sound levels if testing occurs during the quietest hour of the day. Such an increase would be noticeable but would be infrequent, which would minimize any potential noise impact. Pool Condenser Unit The pool condenser until will be located adjacent to the northerly terminus of Mason Street between the gymnasium and proposed pool facility. This unit will serve as a climate control dehumidification system for the purpose of removing excess moisture due to the proposed indoor pool.

With installation of a 10-foot masonry high wall around the emergency generator together with concurrent operation of the chillers and pool condenser will comply with the daytime noise limits at nearby residential receiving properties. The resulting increases over existing background sound levels range from 0 to 4 dBA at nearest residential properties. A 4 dBA increase would be noticeable; however, a 4 dBA increase at a single residential property may occur only if generator testing were to occur during the very quietest hour of the day (between 9 and 10 AM) which is unlikely. In addition, the 4 dBA increase remains well below the daytime noise limit of 55 dBA. Because generator testing would occur infrequently for relatively short periods, such testing would result in minimal potential for noise impacts. Animal Sciences Program The Animal Sciences Program offered by CTE which houses animals (a horse, dogs, rabbits, chick/chickens, and lambs/sheep for very short periods of time) will have no adverse impact to the neighboring residences. Except for the lambs/sheep, the animals will be housed within the Animal Sciences building and for those periods the lamb/sheep will be on-site, the lambs/sheep will be kept in the covered pen which is located south of the greenhouse and Animal Sciences building which provide very effective sound barriers. Activities on Multi-Use Field The Noise Study evaluated typical athletic events (baseball, fast pitch, soccer, lacrosse) which would occur at the Multi-Use Field based upon historical information from the District on the number of participants and spectators participating at the District’s existing fields. A worst case scenario was analyzed, assuming a tennis event would occur simultaneously with the loudest of either a baseball


or soccer event in conjunction with use of the chillers and the pool condenser unit. Noise modeling of these combined noise sources demonstrate that compliance with the City’s noise limits (55 dBA) would be achieved with an Leq increase of 0 – 2 dBA over background levels at resulting in a barely noticeable sound level. Whistle Blowing In addition to the more consistent sources, whistle blowing on the Mult-Use Field would produce occasional, short duration of elevated sounds. Whistles are typically used intermittently by coaches during field practices and by referees during games and the whistle blower is typically not stationary but moving around the field. The District will restrict the type of whistles to emit no more than a sound power level of 100 dB or less in order to control the sound level emitted. The noise assessment considered several locations where whistle blowing could occur on the field and the worst-case sound levels for each receptor location were evaluated. Noise modeling of the whistle blows demonstrates that the levels are expected to be well under (62 dBA) the noise limit of 70 dBA applicable to brief, intermittent noises emitted less than 90 seconds of any hour (SMC 8.14.080B.3). In addition, the modeled whistle blowing levels comply with the noise limit applied to sounds emitted less than five minutes of any hour (65 dBA). Public Address System The baseball and fast-pitch fields would use a PA system comprised of four public address (PA) speakers, each pointed to the bleachers. The speakers would be restricted (by software installation) to emit a sound level of no more than 68 dBA at the farthest portion of the bleachers from each speaker. The speakers would be used only during games and would be restricted to announcements and description of events on the fields. No music would be played over the system. The intermittent play-by-play and announcements would result in sporadic emission of sound from the speakers, with sound expected to be emitted less than 15 minutes of any hour, which is subject to a noise limit of 60 dBA (SMC 8.14.080B.1). Modeled sound levels of the PA system comply with the limit at all neighboring properties.

3) Proposed measures to reduce or control noise impacts, if any:

The following measures have been incorporated into the Master Plan Project:

• The school buses would turn off their engines during loading and unloading of students (both within the westerly drop-off area for special education buses and on Mason Street).

• The chillers will be located on top of the kitchen area of the Phase 1 Building and surrounded with 12-foot high acoustical panels.

• The emergency generator will be housed in a 10-foot high masonry walled enclosure.

• A 6-foot high solid fence will be constructed along the drive aisle abutting the westerly boundary of the Multi-Use Field.

• The animals housed in the Animal Sciences Program will be contained within the Animal Sciences Building and the outdoor cover pen is located a significant distance from Wood Avenue and north of both the Animal Sciences Building and the Greenhouse which provide very effective sound barriers.


• The District will restrict the type of whistles to emit no more than a sound power level of 100

dB or less in order to control the sound level emitted to ensure compliance with noise limits.

• The Public Address System to be used at the Multi-Use Field will be controlled. The District will set the volume of the system so as not to exceed a maximum sound level of 68 dBA in the center of the Multi-Use Field. Such control will be achieved through installed software which sets a ceiling/maximum sound level for the system as identified during a volume calibration and equalization test.

• The District will conduct noise level monitoring of the chillers, the pool condenser, the emergency generator, and the Public Address system upon post-occupancy installation of these noise sources and will provide the City of Sumner with a letter report of such monitoring results.

8. Land and Shoreline Use 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.

The current use of the existing High School campus (1707 Main Street) is an educational (high school) use with adjoining gymnasium, Performing Arts Center, swimming pool, and Stadium.

The District has acquired certain residential properties (1111 and 1101 Wood Avenue; 1412, 1416, 1420, 1424, 1428, 1432, 1434, 1502, and 1506 Mason Street; and 1518 Main Street and 914 and 908 Meeker Avenue), as described above, abutting or adjoining the existing High School campus. There are single-family and multi-family residential uses, retail uses, a shopping center, a gas station, and church uses adjacent to the existing High School campus.

The properties at 1518 Main Street and 914 Meeker Avenue are currently bounded by the Central Business District and 908 Meeker Avenue is zoned Low Density Residential Zone (LDR-6). There are residential parcels and commercial properties abutting these parcels. The parking area at 1518 Main Street and the parcels at 914 and 908 Meeker Avenue collectively constitute the “Elhi Hill/Meeker Avenue Parking Lot” which has been permitted under the existing CUP PLN 2018-0015 (part of the Original SEPA Proposal). However, as indicated in the Project Description the Meeker Avenue/Elhi Hill Parking Lot is part of the Revised Project for purposes of parking count, and therefore, is incorporated by reference into the Sumner High School Master Plan Project.

As described under this SEPA Checklist, the Project will have no significant, adverse impacts on nearby or adjacent properties.

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?


The Project Site is located in the Urban Area and has not been used for farmland or forest lands.

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:

Not applicable; there are no working farms or forest lands surrounding the Site.

c. Describe any structures on the site.

There is an existing High School with classrooms, gymnasium, Performing Arts Center, temporary portables, swimming pool, and Stadium located at 1707 Main Street. There are no structures on the abutting parcels on Wood Avenue and Mason Street identified above under Section 8(a). A barn and one-half (1/2) of the Greenhouse on the existing High School campus was demolished under CUP PLN 2018-0015 (the Original SEPA Proposal).

d. Will any structures be demolished? If so, what?

Except for the Sunset Chevrolet Stadium and its associated outbuildings, all of the existing structures on the existing High School campus will be demolished in phases based upon a construction sequencing plan as detailed in the Construction Sequencing Plan, dated February 1, 2021, attached hereto.

e. What is the current zoning classification of the site?

The Zoning Classifications are as follows: Existing Sumner High School (1707 Main Street) Low Density Residential-12 Adjoining Parcels to Existing High School Site (1111 and 1101 Wood Avenue and 1424, 1428, and 1506 Mason Street): currently zoned Medium

Density Residential; however, the City is seeking to re-classify these parcels to LDR-12 as part of the District’s Comprehensive Plan Amendment request for Public-Private Utilities and Facilities. City Staff has recommended approval, by written Staff Reports, and on January 7, 2021, the Planning Commission recommended approval of both LDR-12 and PPFU to the City Council of the District’s Comprehensive Plan Amendment.

Elhi Hill Educational Program and Abutting Parcels 1518 Main Street and 914 Meeker Avenue: currently zoned Central Business District; however, the City is seeking to re-classify these parcels to Neighborhood Commercial (NC) as part of the District’s


Comprehensive Plan Amendment request for Public Private Utilities and Facilities. City Staff has recommended approval, by written Staff Reports, and on January 7, 2021, the Planning Commission recommended approval of both NC and PPFU to the City Council of the District’s Comprehensive Plan Amendment. Adjoining Parcel (908 Meeker Avenue): Low Density Residential-6000 (no change to the zone classification has been requested by Staff as part of the Comprehensive Plan Amendment process).

f. What is the current comprehensive plan designation of the site?

Existing Sumner High School: Public-Private Utilities and Facilities. Adjoining Parcels to High School: (1111 and 1101 Wood Avenue and 1111 and 1101 Wood Avenue; 1412, 1416, 1420, 1424, 1428, 1432, 1434, 1502, and 1506 Mason Street ): Medium Density Residential; however, the District has requested a Comprehensive Plan Amendment for re-designation of all eleven (1) parcels to Public-Private Utilities and Facilities. City Staff has recommended approval, by written Staff Reports, and on January 7, 2021, the Planning Commission recommended approval of PPFU to the City Council. Elhi Hill Educational Program and portion of Elhi Hill/Meeker Avenue Parking Lot: (1518 Main Street and adjoining parcel 914 Meeker Avenue: Central Business District Adjoining Parcel, and Meeker Avenue/Elhi Hill Site (908 Meeker Avenue): Low Density Residential; however, the District has requested a Comprehensive Plan Amendment to re-designate the Main Street/Meeker Avenue parcels, all as Public-Private Utilities and Facilities. City Staff has recommended approval, by written Staff Reports, and on January 7, 2021, the Planning Commission recommended approval of PPFU to the City Council.

g. If applicable, what is the current shoreline master program designation of the site?

The Master Plan Project Site is not located within a shoreline designation. h. Has any part of the site been classified as a critical area by the city or county? If so,

specify.

The Master Plan Site lies within Volcanic Hazard Area, Seismic Hazard Area, and Aquifer Recharge Area.

i. Approximately how many people would reside or work in the completed project?

Existing Staff of 150 Student Capacity of 1830

j. Approximately how many people would the completed project displace?

The Revised Proposal would not displace any people as the properties have all been demolished.


k. Proposed measures to avoid or reduce displacement impacts, if any:

There are no displacement impacts and therefore no mitigation is proposed. L. Proposed measures to ensure the proposal is compatible with existing and projected

land uses and plans, if any:

As fully described in the Application for a Major Amendment to the Conditional Use Permit, the District has thoughtfully, carefully, and comprehensively evaluated potential impacts of the Master Plan Project, with the engagement of consultants highly qualified and experienced in their fields and with the evaluation of school projects, including high school projects. In addition, the District has engaged community members through a Construction Review Task Force, Facilities Steering Committee, and public meetings to review, study, and evaluate the Mast Plan. The District has further held considerable pre-application dialogue with City Staff in a series of meetings to review the Master Plan Project and to determine areas and issues to review and address to ensure compatibility with the surrounding area.

The extensive evaluation of appropriate and necessary educational functions and programmatic needs now and into the future by the Construction Review Task Force, the public as part of public meetings, and the Facilities Steering Committee provided the foundation and orientation of the facilities and design. The District engaged school-experienced architects, an experienced Project Manager, and traffic, noise, lighting, environmental, and architectural consultants to ensure the District planning and design elements considered the programmatic needs of the District and the Project’s relationship as a community resource and to the adjacent community to ensure compatibility with the surrounding area.

The Master Plan Project will continue the legacy of Sumner High School as the heart of the community and as a connecting bridge between the Town Center and East Main with both educational and community resources and amenities in a compact environment consistent with the Growth Management Act (GMA) and the City’s Comprehensive Plan goals of compact urban development and the provision of public amenities within an urban environment. These twin goals of compact urban development are recognized as essential components of planning to provide consistency with the GMA, Multi-County Planning Policies, the County Wide Planning Policies, and the City’s Comprehensive Plan as recognized by the City’s Supplemental Environmental Impact Statement associated with the 2020-21 Comprehensive Plan update process.

Through an iterative process with its consultants, the District’s Master Plan incorporates numerous mitigating elements to ensure there are no significant, adverse impacts from the Master Plan Project (as detailed fully in the attached Conditional Use Permit criteria letter and herein):

• Landscaping to complement the streetscape on Main Street, including large areas of

green space facing the central City core, Wood Avenue, and Main Street • Interior landscaping including the parking lots


• Ten (10) foot Masonry walls surrounding the emergency generator and location of the chillers on the rooftop of the kitchen area of the Phase 1 building surrounded by twelve (12) foot acoustical panels.

• Six (6) foot solid wood fencing along the school bus drive aisle from Mason Street to Washington Avenue.

• Restrictions on the sound power level of whistles on the Multi-Use Field to 100 dB or less to ensure compliance with noise limit and no significant adverse impact.

• Restriction on the volume of the PA systems achieved through software installation to ensure compliance with the noise limits and no significant, adverse impact.

• Installation of downward directed, fully shielded highly and an efficient LED lighting system to more precisely control the lighting and equipped with motion sensors to reduce light to 50% within the drive aisles and parking lots to control lighting spillage and glare.

• Incorporation of a District Standard Operating Procedure to control periods of use. • Installation of a state-of-the art, high efficiency, reduced color temperature (4500K) LED

lighting system with extended external visors where appropriate at the Multi-Use Field and tennis courts, as consistent with the International Dark Sky Association (IDSA) community-friendly lighting guidelines for athletic fields to precisely control the area intended to be lit which substantially mitigates light spillage, glare, and sky glow.

• Replacement of the lighting system at the existing Sunset Chevrolet Stadium with a state-of-the art lighting system and reduced color-temperature (4500K), heavily shield LED luminaires as designed for the proposed Multi-Use Field, consistent with IDSA guidelines to significantly reduce light spillage, glare, and sky glow.

• New, expanded parking lots with a capacity of not less than 688 spaces with a main, centrally located parking lot convenient for students and community use associated with the athletic facilities, and the Performing Art Center.

• Large clerestory windows (with metal trim) used in the classrooms and library facing Main Street will connect the school with community.

• The school buildings connected by glassed encased breezeways are stepped down from south to north to provide compatibility with the residential areas north on Mason Street.

• The school buildings are designed with significant setbacks from Main Street and Mason Street with distances measuring up to 205’ and 245’, respectively.

• Post-occupancy evaluation of all mechanical systems will occur to confirm performance standards and procedures.

• The District’s lighting design consultant will conduct post-occupancy testing of the lighting systems to ensure appropriate aiming of the LED lights and any associated necessary adjustments to the lighting systems by the District’s lighting design consultant will be made.

• The District’s noise consultant will conduct post-occupancy noise measurements of the emergency generator, the chillers, the pool condenser, and the public address system to ensure operation is in conformance with regulatory noise limitations.

m. Proposed measures to reduce or control impacts to agricultural and forest lands of long-term commercial significance, if any:


The Master Plan Project Site is not located near agricultural or forest lands and no mitigation measures therefore are necessary.

9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle,

or low-income housing.

No housing units would be provided as part of the Master Plan Project which is proposed to construct a school.

b. Approximately how many units, if any, would be eliminated? Indicate whether high,

middle, or low-income housing.

The former housing units were demolished. c. Proposed measures to reduce or control housing impacts, if any:

There are no housing impacts and therefore no mitigation is provided. 10. Aesthetics a. What is the tallest height of any proposed structure(s), not including antennas; what is

the principal exterior building material(s) proposed?

There are minimal portions of the replacement High School buildings under the Master Plan which exceed the permissible 50’ height limitation for schools, allowed by a Height Exception under SMC 18.12.080L. The Sumner Municipal Code height limitations also excludes elevator shafts and other similar mechanical enclosures. SMC 18.32.020A. Height limits may be exceeded under the Sumner Municipal Code, in accordance with a Development Agreement under SMC 18.20.020E. The tallest height of the Master Plan Project is the Performing Arts Flyloft at 60’ which internally houses mechanical equipment. The Flyloft area represents 2% of the roof area of the entire Master Plan and 2.7% of the Phase 2 East Building. The existing Performing Arts Center Flyloft rises to 56’. The total roof area of the Flyloft is approximately 3,550 sq. ft. of the entire school buildings roof area of 217,477 sq. ft. under the Master Plan.

The exterior finishes of the school buildings under the Master Plan will establish a future-focused education commitment complementary to an urban environment as contemplated under the City’s Comprehensive Plan. The school buildings provide compact development to maximize the function of buildings which in turn allow for maintenance of open space with enhanced and increased public amenities. Ample glazing, simple lines, and durable materials will be reminiscent of instructions of higher learning. The exterior walls are clad in a combination of brick masonry, cement board and metal siding. The exterior building form, use of materials, and detailing all integrate to create a sense of permanence and tradition of northwest architectural expression coupled with a representation of the Sumner High School legacy in colored purple panels and Spartan graphics.


b. What views in the immediate vicinity would be altered or obstructed?

The current views will not be altered or obstructed as the varying heights of the school buildings under the Master Plan Project are substantially consistent with the heights of the existing High School with the existing Performing Arts Center Flyloft rising to 56’10” and the Stadium (home) bleachers rising to about 41’. In addition, there are no view corridor protection areas under the land use designations of the Master Plan Project Site.

c. Proposed measures to reduce or control aesthetic impacts, if any:

The District has thoughtfully and carefully, through an iterative process, reduced the massing of the school buildings facing Main Street and Mason Street by stepping the heights of the buildings along the street frontages. In addition, modulation of the buildings are achieved through the variation of building materials, configuration, and significant setbacks from up to 205’ on Main Street and up to 245’ on Mason Street coupled with large, open landscaped areas inviting connection with the surrounding area.

Moreover, the District engaged BLRB Architects to prepare a Shadow Analysis Study. This Shadow Analysis, dated February 1, 2021, establishes, under worst case modeling which assumes a clear sky condition with the most intense sunlight although not representative of the actual cloud cover at the Project Site during the four seasonal evaluation periods, two key conclusions: (i) there is no shading impact beyond the Project Site during the Spring Equinox, Summer Solstice and Autumnal Equinox, and (ii) during the Winter Solstice (the shortest day of the year), there is no shading impact on the residential properties on the north side of Mason Street cast by any phase of the Master Plan Project. At no point does the Project cast a shadow on the homes on Mason Street. The residences south of the Master Plan Project on Main Street will not experience any shadows from the project due to the southerly sweep of the sun across the sky.

11. Light and Glare This section presents a summary of lighting-related information for the Master Plan Project; see

the Site Lighting and Multi-Use Field Study, dated February 12, 2021, prepared by Stantec, together with Photometric Plans prepared by BCE Engineers and MUSCO. Attached hereto is a complete and detailed description of the lighting-related information and evaluation.

a. What type of light or glare will the proposal produce? What time of day would it

mainly occur?

The new parking lots, walkways and plaza areas will be illuminated to provide safety and security for students, staff and visitors. The exterior lighting consists of high efficiency full cutoff LED luminaires on 22’ tall poles for parking lot illumination and on 12’ tall poles for walkways\plaza areas. All parking lot, walkway and plaza lighting will be equipped with motion sensors to dim the lighting to approximately 50% unless motion is detected. In addition, all exterior lighting will be controlled by the District’s Standard Operating Procedure which requires all exterior lighting to be off during the daylight and off during the weekends unless an activity is occurring. Exterior lighting will be


programmed to be turned on for security purposes about 15 minutes before the first person arrives (approximately between 6:00 a.m.), will be off during the day time, and turned on at dusk but dimmed to at least 50% unless motion is detected and turned off 15 minutes following completion of janitorial service (approximately 11:15 p.m.).

The new Multi-Use Field and tennis courts will be lighted with state-of-the art lighting systems to ensure visibility and safety on the field and courts and consistency with the International Dark Sky Associations guidelines for community-friendly lighting of athletic facilities. The existing unshielded metal halide floodlights at Sunset Chevrolet Stadium with be replaced with shield lighting which substantially reduces uplighting. New heavily shielded high efficiency LED luminaires will be provided at the new Multi-Use Field, new tennis courts, and Sunset Chevrolet Stadium. With this reduction in uplight at the Multi-Use Field and the Stadium field, a zone of darkness above the field occurs which creates a safety hazard for players on the field. To ensure the players on the field can safely track balls, lower wattage ball tracker lighting will be mounted at 15’ on four poles to ensure the players on the field can safely track the balls. There will be no adverse impacts form the minimal uplight used with the lighting systems. All athletic lighting will be capable of dimming to 50% light levels to allow for egress and cleanup after scheduled events. The athletic lighting will be operated by a fully programmable controller with remote operation. Additional on-site controls will be provided which will ensure the athletic field lighting will not be turned on when the fields are not in use and turned off after scheduled events.

b. Could light or glare from the finished project be a safety hazard or interfere with views?

The proposed parking lots, pathway illumination, and athletic facilities lighting systems will not interfere with any views or be a safety hazard.

c. What existing off-site sources of light or glare may affect your proposal?

The District is not aware of any off-site sources of light that will affect the Master Plan Project. d. Proposed measures to reduce or control light and glare impacts, if any:

Lighting for the Master Plan Project has been designed to minimize off-site lighting impact in accordance with the International Engineering Society (IES) design recommendations and International Dark Sky Association (IDSA) guidelines for athletic facilities. The designed lighting systems are state-of the art with the most technologically advanced systems available to substantially reduce glare, spillage, and sky glow, and do not create a significant, adverse off-site lighting impact to the surrounding area. Parking lot lighting is full cut-off LED lighting which does not provide light above the luminaire. Pathway lighting provides decorative features that incorporate a de minimis amount of up lighting while minimizing light spillage and glare.

All parking lot and pathway lighting is designed to light only the areas necessary to minimize off-site light spillage. As part of the Project, the exterior lighting will be programmed to provide parking lot lights and exterior wall-mounted lighting, for safety and security purposes, during low light morning


and evening time periods.

Lighting for Sunset Chevrolet Stadium, the Multi-Use Field and tennis courts is designed with 4500 CCT to minimize off-site lighting impacts in accordance with IES and IDSA recommendations. Ball trackers are mounted on the Multi-Use Field and Stadium poles to ensure visibility on the field. The luminaires selected are the most advanced in the industry for controlling and minimizing glare and spill light. Large, extended external shields are provided, where appropriate, to minimize glare, spill light and skyglow.

All exterior lighting will be controlled by the following District Standard Operating Procedure which is incorporated into the Master Plan Project:

• All exterior lights shall be off during daylight hours. • In the morning, parking and pathway lights shall turn on no earlier than 15 minutes before the

first employee arrives. • In the evening, exterior lights shall turn off no later than 15 minutes after the building is

secured for the evening (typically around 11:15 pm) except exterior lighting shall be allowed on non-school days in the evenings for authorized facility events .

• On weekends, parking and pathway lighting shall be allowed for authorized facility events only. Otherwise exterior lights shall remain off.

• All parking and pathway lights shall be equipped with motion sensors to dim lighting to approximately 50% intensity when no motion is detected.

• The athletic lighting systems will be controlled by the District’s lighting control system to schedule lighting to turn on 60 minutes before an event and to be turned off no later than 30 minutes after an event to allow safe exiting of players and spectators and maintenance of the facilities by District staff; provided, however, the lighting systems shall be dimmed to 50% to allow for safe egress and cleanup after completion of scheduled use.

• All athletic events will be scheduled to conclude by 10:00 p.m.

As an additional mitigation measure, the District’s lighting design consultant will conduct post-occupancy testing of the lighting systems to ensure appropriate aiming of the LED lights and any associated necessary adjustments to the lighting systems by the District’s lighting design consultant will be made.

12. Recreation a. What designated and informal recreational opportunities are in the immediate

vicinity?

The existing Sumner High School offers multiple recreational opportunities with Sunset Chevrolet Stadium’s track and field, the field being used also for football, soccer and lacrosse. To the north of Sunset Stadium, on District-owned property, are additional grass fields currently used for soccer and a variety of community recreational uses. The District’s existing swimming pool has been used for student and community use since 1970. In addition, on the westerly portion of the site are two


ballfields used for fast pitch. In addition, in the near vicinity is the Bill Heath Sports Complex and Daffodil Valley Elementary School which contains fields for community recreational use as well.

b. Would the proposed project displace any existing recreational uses? If so, describe.

Under the Master Plan, except for Sunset Chevrolet, the existing athletic facilities will be demolished and will be replaced with state-of-the art facilities.

During Phase 1 of the Master Plan, the baseball and softball fields will not be available for use but alternative, off-site arrangements for these fields will be made. During Phase 2 of the Master Plan, the grass field on the north side of Sunset Chevrolet Stadium will not be available for use.

c. Proposed measures to reduce or control impacts on recreation, including recreation

opportunities to be provided by the project or applicant, if any:

As part of the Master Plan, expanded and improved athletic facilities are proposed as part of the Master Plan which will significantly increase the athletic and recreational opportunities to students and the community. The new facilities include a synthetic turfed, Multi-Use Field to support, softball, baseball, soccer, lacrosse and general recreational uses with supporting facilities such as storage buildings, concessions/restrooms, and spectator seating, and eight tennis courts with seating. A new gymnasium with 2,000 seating capacity with an auxiliary gym of 8,124 sq. ft accommodating state- of-the art aerobics, fitness, and health facilities and men’s, women’s and visiting team locker rooms. The District’s swimming pool will also be demolished under Phase 2 of the Master Plan and will be permitted for a 30,000 sq. ft. facility with eight lanes to allow Washington Interscholastic Activities Association meets, USA Swimming meets, and club swimming teams events, a water polo component, and a diving area as part of the Master Plan, subject to review by a Facilities Steering Committee to be convened in conjunction with a future capital bond for Phase 2.

13. Historic and cultural preservation 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.

The Master Project Site does not contain any known places or objects listed on, or proposed for, national, state, or local preservation registers.

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.

The entire Master Plan Project Site has been highly disturbed over the years with buildings constructed and demolished on all parts of the Site with the first building constructed in the early 1900s along Wood Avenue. The District is not aware of any evidence that the Site contains any designated landmarks or archaeological or scientific artifacts.


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.

Review of historic mapping and GIS data.

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.

In the event that unanticipated archaeological or historic resources are encountered during construction for either Phase 1 or Phase 2 of the Master Plan Project, all ground-disturbing activity near the find will be halted, and DAHP will be promptly notified. If evidence of human remains is encountered, all ground-disturbing activity in the vicinity will be halted immediately and protected from further disturbance. DAHP, the Pierce County Medical Examiner’s Office, and the City Police Department will be contacted. If the medical examiner determines the remains are non-forensic, then DAHP will take jurisdiction and will notify the appropriate Tribes.

14. Transportation

This section presents a summary of transportation related information for the Master Plan Project; see the Transportation Technical Report, dated February 10, 2021, prepared by Heffron Transportation. Attached hereto is a complete and detailed description of the transportation-related information and evaluation.

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.

The existing site currently has 14 total curb cuts with nine regularly functioning as vehicular access driveways; five (5) are gated curb cuts that generally remain closed (two on Washington Street near Bonney Avenue are gated and remain closed due to portable classrooms in the north parking lot, two on the east edge of the Mason Street cul-de-sac, and one ) on Valley Avenue near the northeast corner of the running track). Of the nine regularly functioning driveways, four are located along Main Street—the easternmost serves the Sunset Chevrolet Stadium parking lot, two one-way driveways serve the school-bus loop (entry on the east and exit on the west), and the westernmost access serves the “West” parking lot west of the school building. There is one access driveway on Wood Avenue opposite North Street that serves the lot west of the athletic fields. There are three access driveways on Mason Street—one located just east of the tennis courts and two within the cul-de-sac. One driveway on Valley Avenue provides access to and from the stadium lot. School buses load and unload within the bus loop; some special education (SPED) buses load/unload along the west side of the building within the west parking lot.

No changes to the surrounding roadway network are proposed. However, the Master Plan Site reconfiguration would change the location and function of driveways for the entire Site, resulting in five driveways and one fire-lane access on Main Street, four limited-access curb-cuts and two fire-


lane accesses on Mason Street, one existing egress on Washington Street, and two access points on Valley Avenue. Under Phase 1 of the Master Plan Project, the Project proposes to establish a new on-street, curb-side school-bus load/unload zone along the south side of Mason Street west of the existing cul-de-sac. This load/unload zone is expected to be signed for school-bus-use only on school days during arrival and dismissal periods. The District would coordinate with the City on signage for the new school-bus load/unload zone. It is expected that the curb-side load/unload zone would be available for general parking when not restricted to school-bus-use only (e.g. evenings and overnight).

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?

ST Express Route 578 provides all-day two-way service, seven days per week, between Puyallup, Sumner, Auburn, Federal Way, and Downtown Seattle. On weekdays, the route operates from about 6:00 A.M. to 12:00 A.M. with headways (time between consecutive arrivals) of 20 to 30 minutes. It also operates all day on Saturdays and Sundays with 60-minute headways.

ST Express Route 596 provides peak-period peak-direction service on weekdays between Sumner and Bonney Lake. The route operates 10 trips into Sumner in the morning from about 5:00 to 10:40 A.M. (most headways of 20 to 30 minutes) and 10 trips to Bonney Lake in the afternoon from about 3:15 to 7:30 P.M. (headways of 25 to 40 minutes).

Sounder commuter rail service connects Lakewood and Seattle with stops in Tacoma, Puyallup, Sumner, Auburn, Kent, and Tukwila. It operates on weekdays with 13 trips in each direction. During the morning commute period (about 4:30 to 9:10 A.M.), there are ten northbound trips and three southbound trips; during the afternoon commute period (about 2:30 to 7:45 P.M.), there are ten southbound trips and three northbound trips. There is no regular weekend service, although there is occasional special event service (e.g. large Seattle stadium events).

Sound Transit has plans for access improvements at and around Sumner Station. Improvements will include a new parking garage at the current station with sidewalk and lighting improvements. A surface-lot located south of Maple Street, north of Maple Street, and at the Red Apple building will remain. The garage will increase the parking total from 352 to 857 stalls. Garage construction is scheduled to begin in 2021 and open for public use in 2022. All access improvements are planned to be completed by 2023.

The District provides yellow bus service to eligible students. Eligibility for District-provided transportation depends on several factors, but is generally provided to students whose legal place of residence is greater than two miles from their regular school of attendance. Note that exceptions are defined for individuals based on health requirements, educational program needs, or certain geographical considerations.

c. How many additional parking spaces would the completed project or non-project

proposal have? How many would the project or proposal eliminate?


Upon full buildout, inclusive of the Meeker Parking Lot under construction as authorized under the existing CUP, the District will increase parking capacity on the Site from 464 spaces to not less than 688 spaces; these totals include six spaces (existing and with the project) in the Wood Avenue lot that are used by the Heritage Bank.

Upon completion of Phase I of the Master Plan, there will be available 590 parking stalls available for student, staff, and visitor parking. In addition, the District and the City have entered into a Parking Use Agreement for District student and staff use of the parking lot at the Bill Heath Sports Complex associated with CUP-2018-0015.

Upon completion of Phase 2 of the Master Plan, there will be not less than 688 parking stalls available for student, staff, and visitor parking. A key element of the Master Plan is the designed, central location of the Main Parking Lot’s convenient access for: (i) student parking adjacent to the student entrance, and (ii) adjacent to the Performing Arts Center and athletic facilities for community use.

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).

The traffic analysis prepared by Heffron Transportation establishes that the Master Plan Project does not create the need for any right-of-way improvements. The District will apply for public alley right-of-way vacations located at the westerly terminus of Mason Street and at the northerly terminus of Mason Street where the alley extends north to Washington. In addition, the District will apply for a right-of-way vacation of a triangular area located at the southwesterly terminus of the Revised Project Site and triangular area at the southeasterly terminus of the Revised Project Site as illustratively shown on the ROW Dedication/Deed Conveyance Map, dated January 30, 2021. The District will dedicate portions of the cul-de-sac at the westerly terminus of Mason Street that now lay on District property to the City of Sumner.

In coordination with the City, the District has agreed to the following public right-of-way improvements:

RIGHT-OF-WAY CROSSWALKS

The following crosswalks will be improved as part of Phases 1 and 2 to comply with ADA standards, in accordance with a Development Agreement, at the locations below. The crosswalk upgrades shall be limited to associated sidewalk and curb ramps and crosswalk striping only. No modifications for ADA compliance will be made to the existing road prism.

1. Phase 1: At the intersection of Main Street and Meade Avenue (the north-south crosswalk on Main and Meade, and the east-west crosswalk on Meade extending westerly). The north-south crosswalk shall be installed from the eastern corner to allow for a curb cut for fire access off of Main Street;

2. Phase 1: At the intersection of Main Street and Meeker Avenue (the north-south crosswalk on Main and Meeker, and the east-west crosswalk on Meeker extending easterly);


3. Phase 1: At the intersection of Mason Street and Wood Avenue (the north-south crosswalk on Mason Street and the east-west crosswalk on Wood Avenue extending westerly across Wood);

4. Phase 2: At the intersection of Main Street and Lewis Avenue (the north-south crosswalk on Main and Lewis, and the east-west crosswalk on Lewis extending easterly across Lewis);

5. Phase 2: At approximately the mid-point of Valley Avenue between Main Street and Washington Street (the east-west crosswalk on Valley located easterly of the offices of the District’s Athletic Director to the point of connection with the easterly side of Valley, south of the entrance to Fred Meyer);

6. Phase 2: At the intersection of Valley Avenue and Washington Street (the westerly north-south crosswalk on Washington only);

7. Phase 2: At the intersection of Main Street and Bonney Avenue (the easterly crosswalk on Main and Bonney, and the east-west crosswalk on Bonney Avenue; and

8. Phase 2: At the intersection of Wood Avenue and North Street (the north-south crosswalk on North Street and the east-west crosswalk on Wood Avenue extending westerly across Wood).

BULBOUTS

Under the Master Plan Project, in accordance with a Development Agreement, the District will construct permanent “bulb-outs” for improved visibility in the location of certain temporary bulb outs to be installed by the City at the intersections of Main Street at Meeker Avenue, at Mead Avenue, at Bonney Avenue, and at Lewis Avenue. Bulb-Outs, consistent with the attached Bulb-Out drawing, dated February 1, 2021, prepared by AHBL Engineers. Public right-of-way stormwater will discharge uninterrupted via the gutter to the City’s stormwater system. Permanent bulb-outs at the intersection of Main Street and Meeker Avenue and Main Street and Meade Avenue will be completed as part of Phase 1. Permanent bulb-outs at the intersection of Main Street and Bonney Avenue and Main Street and Lewis Avenue will be completed as part of Phase 2.

DRIVEWAY APPROACHES

In conjunction with the Master Plan Project, the District, as described above under Section 14(a), will create new access locations which will require new curb cuts of varying widths for driveway approaches, consistent with the City Development Standard Specification R6-8, as shown on the attached Right-of-Way Improvements Plan, dated February 1, 2021. An additional driveway approach will be located on Main Street between the Phase 1 building and the West Building in compliance with the Fire Code as determined by East Pierce Fire & Rescue.

SIDEWALKS All sidewalk segments along the Master Plan frontage (Main Street, Wood Avenue, Mason Street, Washington Street, and Valley Avenue) that are currently not compliant with ADA standards will be replaced, as appropriate.


e. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe.

The Master Plan Project would not use or occur in the immediate vicinity of water, rail, or air transportation. However, as stated above, Sound Transit provides Sounder commuter rail service to and from Sumner at Sumner Station about ½-mile southwest of Sumner High School. It is possible that some students or employees of Sumner High School could use commuter rail service.

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?

The traffic analysis reflects conditions with the Master Plan Project and new enrollment capacity of up to 1,830 students, an increase of 33 students compared to the school enrollment of 1,797 students at the time of data collection. Based on daily trip generation rates published for high schools by the Institute of Transportation Engineers and adjusted to reflect peak period rates observed at the Site, the Master Plan Project is estimated to generate a net increase of about 90 trips per day (45 in, 45 out). The peak traffic volumes occur in the morning just before classes begin (between 6:30 and 7:30 A.M.) and in the afternoon around dismissal (between 2:15 and 3:15 P.M.). These estimates include school-bus and delivery trips to the and from the Site. The Site is already served by school buses and other commercial vehicle trips including occasional food and supply deliveries as well as trash and recycling pick-up. Based on video turning-movement counts performed at the existing Site access driveways, the school-bus and commercial-vehicle trips represent between 1% and 2% of the total daily traffic generated at the school.

The Master Plan Project, with the small change in enrollment capacity, is not expected to require additional school-bus or commercial-vehicle trips.

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.

The Project would not interfere with, affect, or be affected by the movement of agricultural or forest products.

h. Proposed measures to reduce or control transportation impacts, if any:

The proposed Master Plan Project is not expected to result in adverse impacts and no long-term transportation mitigation would be required. The District would coordinate with the City on signage for the new school-bus load/unload zone planned on the south side of Mason Street and as appropriate along Main Street.

The City collects traffic impact fees for new development; however, the currently adopted fee rates are based on net new PM peak hour trips generated by proposed development. The proposed Master Plan Project is expected to generate a net increase of 10 PM peak hour trips when compared to the existing school. However, the Master Plan Project includes the elimination of 11 single-family resident parcels from the northwest portion of the Site. Since those homes would

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http://www.ecy.wa.gov/programs/sea/sepa/ChecklistGuidance.html#Transportation


have otherwise generated 11 PM peak hour trips, the Master Plan Project would result in a net decrease in PM peak hour traffic.

15. Public Services 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.

With the small increase in student capacity to be served with the Project (33 students), it is not generally anticipated that there would be an increase in need for public services.

b. Proposed measures to reduce or control direct impacts on public services, if any.

Construction of the Master Plan will be consistent with all required City of Sumner Building Code requirements and fire code requirements of East Pierce Fire & Rescue in effect at the time of building permit submittal relating to Phase 1 and Phase 2 of the Master Plan. No significant adverse impacts to public services are anticipated arising from either Phase under the Master Plan Project.

Fire service will be provided to the buildings as part of the Master Plan. New hydrant spools will be installed on the new and existing watermain to provide fire coverage to the entire exterior of the buildings. Hydrants are spaced at a maximum of 300 feet with 150-foot hose-pull distance. A PIV, FDC, and DDCVA will be provided outside of the buildings in a location accessible by a fire truck. Fire lane and aerial access are provided around the school as fire lanes within parking lots and drive aisles as coordinated with East Pierce Fire & Rescue.

16. Utilities a. Circle utilities currently available at the site:

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.

In conjunction with the Master Plan, water distribution will be provided via an existing City watermain running east to west on the north side of Mason Street and will connect to a new watermain expanded around the buildings to loop the facility. The new watermain will be 8-inch ductile iron pipe. A 4-inch domestic connection will be installed to the building, with meter vaults and the RPBA outside of the building. A separate meter and connection will be provided for irrigation. A 1-inch PE domestic connection will be provided to the new concessions building. All water piping besides the concessions service will be ductile iron. The City, in accordance with a

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Development Agreement to be completed, will provide 1,500 gpm for a two (2) hour duration consistent with certain zoned areas as shown on the Code Compliance Site Plan attached hereto.

Sanitary sewer service will be provided to the buildings at various points around the Master Plan Site. The sewer service is divided into two portions: main extension and side sewer. Main extensions will be private extensions of the City sewer main and will be 8-inch SDR35 PVC with manholes every 300 feet or at angle points. The buildings will connect to these main extensions via side sewer connections, which are 6-inch SDR35 PVC lines and use cleanouts at changes in direction. A side-sewer connection is also provided to the concessions building. Sewer waste coming from the school’s kitchen and food preparation area will be processed via a grease interceptor prior to discharge to the City sewer system.

There are three existing overhead electrical service poles that are located along the North side of Main Street between Lewis Avenue and Meeker Avenue. These poles are owned by the District and only service the existing High School. This electrical service will remain during Phase 1 to service the existing High School and will be de-energized and removed after full buildout of Phase 2. New electric service for Phase 1 and Phase 2 will originate with the three phase power on the west side of Wood Avenue which crosses Wood Avenue on overhead lines where the primary meter and switch will be located. Power will then proceed underground east on the District Site abutting Mason Street to the transformer to energize the buildings and lighting systems. A new natural gas service (underground) on the District Site near the Phase 1 building on Mason Street will be installed to fuel the mechanical systems.

C. Signature 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: ___________________________________ Matthew Guilanians Project Manager, Hainline & Associates Date Submitted: February 22, 2021

Documents

EXPANDED ENVIRONMENTAL CHECKLIST