Phase I Environmental Site Assessment Final Report

Shorecrest High School 15343 – 25th Avenue Northeast Shoreline, WA 98155

EHSI Project #10230-07

Prepared for: Shoreline School District No. 412 c/o: Calvin Gassaway Greene Gasaway Architects P.O. Box 4158 Federal Way, Washington 98063-4158

Prepared by: EHS-International, Inc. 13228 NE 20th Street, Suite 100 Bellevue, Washington 98005-2049 425.455.2959

December 2014

TABLE OF CONTENTS

LIST OF ACRONYMS...... iv

1.0 INTRODUCTION ...... 1 1.1 Purpose ...... 1 1.2 Detailed Scope of Services ...... 1 1.3 Significant Assumptions ...... 2 1.4 Limitations and Exceptions ...... 2 1.5 Special Terms and Conditions ...... 2 1.6 User Reliance ...... 2

2.0 SUBJECT PROPERTY DESCRIPTION ...... 3 2.1 Subject Property Location and Legal Description ...... 3 2.2 Current Use of the Subject Property ...... 3 2.3 Description of Subject Property Structures, Roads and Improvements ...... 3 2.3.1 Existing Structures ...... 3 2.3.2 Existing Roads ...... 3 2.3.3 Utilities ...... 3 2.3.4 Redevelopment of the Subject Property ...... 3 2.4 Current Use of Adjoining Properties ...... 4

3.0 SUBJECT PROPERTY INFORMATION ...... 4 3.1 Title Records ...... 4 3.2 Environmental Liens or Activity and Use Limitations ...... 4 3.3 Specialized Knowledge ...... 4 3.4 Valuation Reduction for Environmental Issues ...... 4 3.5 Owner, Property Manager, and Occupant Information ...... 4 3.6 Reason for Performing the Phase I ESA ...... 5

4.0 RECORDS REVIEW ...... 5 4.1 Prior Environmental Reports ...... 5 4.2 Ongoing Environmental Investigation ...... 6 4.2.1 Buried Debris ...... 6 4.2.2 Acid Tank Excavation ...... 7 4.3 Physical Setting Sources ...... 8 4.3.1 Topography ...... 8 4.3.2 Hydrogeology ...... 8 4.3.3 Soils ...... 8 4.3.4 Sensitive Receptors ...... 8 4.3.5 Flood Plains ...... 8 4.4 Environmental Record Sources...... 8 4.4.1 Subject Property ...... 9 4.4.2 Adjacent Properties ...... 10 4.5 Historical Use – Subject Property and Adjoining Properties ...... 10

4.5.1 Aerial Photographs ...... 10 4.5.2 Fire Insurance Maps ...... 12 4.5.3 Historic Topographic Maps ...... 12 4.5.4 Local Street Directories ...... 13 4.6 Federal Databases ...... 13 4.6.1 National Archives and Records Administration...... 13 4.6.2 USA EPA Region X ...... 15 4.7 State and Local Records ...... 15 4.7.1 Puget Sound Regional Archives ...... 15 4.7.2 WA State Department of Ecology (Ecology) ...... 18 4.7.3 Seattle Fire Department ...... 18 4.7.4 Shoreline Fire Department ...... 18

5.0 SUBJECT PROPERTY RECONNAISSANCE ...... 19 5.1 Methodology and Limiting Conditions ...... 19 5.2 General Subject Property Setting ...... 19 5.3 Interior Observations ...... 19 5.4 Exterior Observations ...... 19 5.5 Adjacent Properties ...... 19

6.0 INTERVIEWS ...... 20 6.1 Interview with Owner ...... 20 6.2 Present and Past Subject Property Manager Interview(s) ...... 20 6.3 Bonafide Prospective Purchaser Interview(s) ...... 20 6.4 Local Government Official Interview(s) ...... 20 6.5 Interviews with Others ...... 21

7.0 DATA GAPS ...... 21

8.0 CONCLUSIONS ...... 21

9.0 DEVIATIONS ...... 21

10.0 REFERENCES ...... 21

11.0 SIGNATURE ...... 24

LIST OF TABLES Table 4.5.1-1 Aerial Photograph Review ...... 11 Table 4.5.3-1 Historical Topographic Maps Review ...... 12 Table 4.5.4-1 Occupants Listed at Subject Property ...... 13

LIST OF FIGURES Figure 1 Site Location Map Figure 2 Site and Surrounding Area Map Figure 3 Site Plan Figure 4 Historic Site Features and Current Excavated Areas

LIST OF APPENDICES Appendix A – Title Documents Appendix B – Environmental Data Resources (EDR) Report Appendix C – Aerial Photographs Appendix D – Sanborn Map Report Appendix E – Historical Topographic Maps Appendix F – Street Directories Appendix G – Archive Tax Records Appendix H – Subject Property Visit Checklist Appendix I – Subject Property Visit Photographs

iii

LIST OF ACRONYMS

AAI ...... All Appropriate Inquiries AESI ...... Associated Earth Sciences, Inc. ALLSITES ...... Facility/Site Identification System Listing AST ...... Aboveground Storage Tank ASTM ...... American Society for Testing and Materials AUL ...... Activity and Use Limitations BGS ...... below ground surface CERCLA ...... Comprehensive Environmental Response, Compensation, and Liability Act of 1980 CERCLIS ...... CERCLA Information System CFR ...... Code of Federal Regulations CORRACTS ...... RCRA Information System-Corrective Action Site CPAHs ...... Carcinogenic Polyaromatic Hydrocarbons CSCSL ...... Confirmed and Suspected Contaminated Sites List DISTRICT ...... Shoreline School District DOH ...... Washington State Department of Health Ecology ...... Washington State Department of Ecology EDR ...... Environmental Data Resources, Inc. EHSI ...... EHS-International, Inc. EPA ...... Environmental Protection Agency EPH ...... Extractable Petroleum Hydrocarbons ERNS ...... Emergency Response Notification System ESA ...... Environmental Site Assessment FINDS ...... Facility Index System/Facility Registry System FOIA ...... Freedom of Information Act ft2 ...... square feet LUST ...... Leaking Underground Storage Tank MANFIEST ...... Manifest Data MTCA ...... Model Toxics Control Act NARA ...... National Archives and Records Administration NFA ...... No Further Action NFRAP ...... No Further Remedial Action Planned NLR ...... No Longer Reporting NPDES ...... National Pollutant Discharge Elimination System (Water Quality Permit System Data) NPL ...... National Priority List RCRA ...... Resource Conservation and Recovery Act of 1976 RCRA CESQG ...... RCRA Conditionally Exempt Small Quantity Generator RCRA NonGen ...... RCRA Non-Generator REC ...... Recognized Environmental Condition SPILLS ...... Reported Spills SVOCs ...... Semivolatile Organic Compounds TCLP ...... Toxicity Characteristic Leaching Process TPH ...... Total Petroleum Hydrocarbons TSD ...... Transporters, Storage, and Disposal µg/L ...... micrograms per liter US ...... United States USA ...... United States of America

USEPA ...... US Environmental Protection Agency UST ...... Underground Storage Tank WWII ...... World War II

1.0 INTRODUCTION 1.1 Purpose This report presents the results of a Phase I Environmental Site Assessment (ESA) conducted at the Shorecrest High School located at 15343 – 25th Avenue NE in Shoreline, Washington (subject property). This Phase I ESA was performed on behalf of the Shoreline School District (District) in response to debris material that was encountered during construction activities at the subject property.

The purpose of the Phase I ESA is to identify, to the extent feasible pursuant to the process prescribed in American Society for Testing and Materials (ASTM) E 1527-13, recognized environmental conditions (RECs) in connection with Shorecrest High School. A REC is defined as the presence or likely presence of hazardous substances or petroleum products in, on, or at a property: (1) due to a release to the environment; (2) under conditions indicative of a release to the environment; or (3) under conditions that pose a material threat of a future release to the environment. The ASTM E 1527-13 practice constitutes all appropriate inquiries (AAI) (defined under 40 Code of Federal Regulations [CFR], Part 312) for the purpose of Landowner Liability Protections, under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). This report reflects the observations, information, and data collected by EHS-International, Inc. (EHSI) in April through October of 2014. Supporting documentation is provided in the appendices as follows:

Appendix A – Title Documents Appendix B – Environmental Data Resources, Inc. (EDR) Report Appendix C – Aerial Photographs Appendix D – Sanborn Maps Appendix E – Historical Topographic Maps Appendix F – Prior Environmental Reports Appendix G – Archive Tax Records Appendix H – Subject Property Visit Checklist Appendix I – Subject Property Visit Photographs 1.2 Detailed Scope of Services This Phase I ESA was performed in accordance with ASTM E 1527-13 (Standard Practice for ESAs: Phase I ESA Process) and consisted of the following tasks: • Review environmental and regulatory records; • Review historical information (topographic maps, aerial photographs, Sanborn fire insurance maps, and city directories); • Review subject property tax records; • Review of chain-of-title information; • Conduct a detailed site reconnaissance of the subject property plus a cursory survey of adjacent properties; • Conduct interviews with the owners; • Review user provided information per the ASTM Standard; and • Prepare a summary report. Per the ASTM-13 Standard, EHSI’s scope of services did not include non-scope considerations as listed in Section 13 of the ASTM-13 Standard and summarized below:

• Asbestos Containing Material; • Lead-Based Paint; • Biological Agents; • Cultural and Historic Resources; • Ecological Resources; • Endangered Species; • Health and Safety; • Indoor Air Quality; • Industrial Hygiene; • Lead in Drinking Water; • Mold; • Radon; • Regulatory Compliance; and • Wetlands. 1.3 Significant Assumptions Information regarding the subject property was reasonably ascertainable and therefore, no significant assumptions have been made, unless otherwise noted in a specific section of the report. 1.4 Limitations and Exceptions The findings within this ESA utilized information that was practically reviewable per ASTM E 1527-13, meaning that only relevant data relating to the subject property has been incorporated into the findings, disregarding extraordinary analysis of irrelevant data. The investigation conducted for this ESA was limited to data that was reasonably ascertainable, meaning that the information obtained was publicly available, obtainable within the cost and time constraints under the scope of services for this project, and practically reviewable.

EHSI does not warrant that there are no toxic or hazardous materials or contamination, nor does EHSI accept any liability if such are found at some future time, or could have been found if sampling, or additional studies were conducted. EHSI does not assume responsibility for other environmental issues that may be associated with the subject property.

In view of the rapidly changing status of the environmental laws, regulations, and guidelines, EHSI cannot be responsible for changes in laws, regulations, or guidelines that occur after the study has been completed and that may affect the subject property. 1.5 Special Terms and Conditions The findings of the ESA are limited and based on the completeness and accuracy of the data and conditions of the subject property as of the dates of the subject property investigation and when public information was obtained as described within this report. 1.6 User Reliance This report was prepared solely for the use of the Client and authorized users, and is not intended for use by third parties. Unauthorized third parties shall indemnify and hold EHSI harmless against any

liability for any loss arising out of, or related to, reliance by any third party on any work performed hereunder, or the contents of this report. 2.0 SUBJECT PROPERTY DESCRIPTION 2.1 Subject Property Location and Legal Description The subject property is located in a residential district at 15343 25th Avenue Northeast in Shoreline, Washington 98155 (Figure 1). The subject property is made up of King County parcel #162604-9008 covering 1,911,412 square feet (ft2 )(43.9 acres) of land. The parcel is divided up into the main tract of land and a detached smaller portion of land to the northwest. A map showing property details is presented in Figure 2. The subject property’s legal description is as follows:

PORS OF S 1/2 OF NW 1/4 & N 1/2 OF SW 1/4 DAF BAAP ON E LN OF SD S 1/2 553.42 FT S OF NE COR SD SUBD TH N 87-51-27 W 984.38 FT TH S 23-44-34 W 226.62 FT TH S 33-44-30 W 464.71 FT TH S 00-09-34 W 358.33 FT TH N 89-58-05 E 162.48 FT TH S 00-23-22 E 168.55 FT TH N 89-42- 17 W 89.70 FT TH S 00-03-03 W 584.31 FT TH N 88-03-56E 192.49 FT TH N 00-09-30 E 250.26 FT TH S 87-53-29 E TO E LN SD N 1/2 TH NLY ALG E LN SD SUBD & ALG E LN OF SD S 1/2 TO POB TGW BEG AT NE COR OF SD S 1/2 TH WLY ALG N LN SD SUBD 834.72 FT TO TPOB TH S 11-46-33 W 294.25 FT TH S 20-08-23 W 31.03 FT TH N 67-58-07 W 305.78 FT TH N 09-12-59 E 217.12 FT TO SD N LN TH ELY ALG SD N LN 319.63 FT TO TPOB TGW 30 FT R/W TO SHORELINE SCHOOL DIST #412 AS SHOWN ON EXHIBIT A REC # 8405080974. 2.2 Current Use of the Subject Property The subject property is currently occupied by Shorecrest High School. 2.3 Description of Subject Property Structures, Roads and Improvements 2.3.1 Existing Structures There are currently three structures located on the subject property that were constructed in 2013. The former school structures have been demolished with the exception of the Theater Building, which was constructed in the late 1990s, which has been partially renovated, incorporated into the new buildings and enlarged.

2.3.2 Existing Roads The subject property is bounded by 25th Avenue Northeast to the east and an alley to the south.

2.3.3 Utilities The subject property is serviced by the Ronald Wastewater District public sewer and North City Water District public water supply.

2.3.4 Redevelopment of the Subject Property The subject property has recently completed a major redevelopment with demolition of former school buildings, construction of sub-grade storm water detention structures, and grading in the southeastern quadrant of the site. Redevelopment activities began in 2011 and are scheduled for completion in late 2014.

2.4 Current Use of Adjoining Properties The following properties were noted adjacent to the subject property: • Hamlin Park is located north of the subject property. • Located east of the subject property is 25th Avenue NE with single-family residences beyond. • Located south of the subject property is South Woods Park. • Located west of the subject property is Fircrest School and Residential Rehabilitation Center as well as the Washington State Department of Health (DOH) Laboratory property. 3.0 SUBJECT PROPERTY INFORMATION 3.1 Title Records EHSI obtained a Chain of Title report from EDR for the subject property. The title report contains a corrective deed, dated August 20, 1986, documenting a sale in 1985 from the State of Washington Department of Natural Resources to Shoreline School District No. 412. The title report reflects that the State of Washington Department of Natural Resources was a previous owner. No industrial or commercial owners were identified in the title records reviewed. An amendment was made to the easement for right of way for the sanitary sewer and storm drain under Application No. 27066, dated April 13, 1961. The original easement location description was found to be in error and updated to reflect actual location of the sewer and storm drains. A copy of the report is included in Appendix A. 3.2 Environmental Liens or Activity and Use Limitations According to the Environmental Lien and AUL (Activity and Use Limitations) Search report completed by EDR, no environmental liens or AULs exist for the subject property. A copy of the report is included in Appendix A along with the title documentation. 3.3 Specialized Knowledge The term “specialized knowledge” means information regarding the environmental condition of the subject property that would not be available in public records or other sources as referenced in this report and could only obtained from disclosure by the owner, occupants, or operators on the subject property from personal experience.

Paul Plumis, retired Shoreline School District employee, has worked directly with the Shorecrest High School site since 1991. He was not aware of any environmental issues associated with the subject property. (Plumis, 2014) 3.4 Valuation Reduction for Environmental Issues There is no sale pending for the subject property and therefore no valuation statements are made here. 3.5 Owner, Property Manager, and Occupant Information The subject property is owned by Shoreline School District No. 412. The current occupant is Shorecrest High School.

3.6 Reason for Performing the Phase I ESA In April 2014, debris material was encountered during construction activities associated with a sub- grade storm water detention structure in the southeast quadrant of the subject property. The debris material consisted of bricks, bottles, metallic objects and oily soil. EHSI was retained to assist the District with an investigation involving characterization and cleanup of the debris material. One of the objectives of the investigation was to conduct a Phase I ESA of the subject property to evaluate the source of the debris material and to identify RECs in connection with the property. 4.0 RECORDS REVIEW 4.1 Prior Environmental Reports Associated Earth Sciences, Inc. 2009. Phase I Environmental Site Assessment – Shorecrest High School This Phase I report details the site history of the subject property as being vacant land until 1942 when a water treatment plant and incinerator were built as part of the US Naval Seattle Hospital. The area of the naval hospital included both the subject property and the adjacent Fircrest School to the west. The treatment plant consisted of seven large circular waste water and sewage treatment vaults, an incinerator, two storehouses, and a water tank tower. No information was provided in regards to the type of treatment (i.e., chlorination, aeration, etc.) or contents of the storehouses. A figure showing the former location of the treatment plant was prepared by Associated Earth Sciences, Inc. (AESI) and is included in this report as Figure 3.

The report noted the subject property was later developed into a school starting in 1960 with construction of the main school building, shop, and gymnasium. Additional structures and renovation activities occurred between 1965 to 1986. There was no documentation in regards to demolition of the former treatment plant or incinerator.

The report identified that the adjacent property to the west was the main location of the naval hospital. The hospital was transferred to King County in 1947 for treatment of tuberculosis patients and was referred to as the Firland Sanatorium. The sanatorium operated until the early 1970s. The property is now occupied by the Fircrest School and DOH Laboratory facilities.

AESI reviewed information concerning Underground Storage Tanks (USTs) on the adjacent Fircrest property but concluded they did not pose a significant risk to the subject property. AESI did not identify any RECs in connection with the subject property (AESI, 2009).

Associated Earth Sciences Inc. 2010. Subsurface Exploration, Geologic Hazards, and Final Geotechnical Engineering Report – Proposed Shorecrest High School Renovation. AESI conducted a geological and geotechnical investigation in 2010 prior to the site redevelopment activities that were recently completed at the subject property. The work involved drilling 19 hollow-stem auger borings and converting six of them to groundwater monitoring wells. Subsurface materials encountered included fill, recessional outwash, till and advanced outwash. Groundwater was encountered in 10 borings and involved a perched zone above the till and a deeper, more extensive groundwater zone within the advanced outwash deposits. Static groundwater levels in the onsite wells varied from approximately 17 feet below ground surface (BGS) to 63 feet BGS (AESI, 2010).

EHSI 2011. Review of Phase I ESA Letter, Shorecrest High School. In 2011, EHSI reviewed the Phase I ESA report prepared AESI (AESI, 2009) and visited the subject property for planning purposes in regards

to the redevelopment of the high school. A summary of key information from that letter is presented below:

• The subject property was developed as a large wastewater and sewage treatment plant and incinerator in 1942. This was part of an adjacent World War II (WWII)-era United States (US) Naval Hospital located immediately to the west. Development of the high school began in 1960, with construction of three buildings. Other buildings were added between 1965 through 1986. • A 1946 map of the naval hospital showed the location of the treatment plant and incinerator on the subject property. • AESI evaluated the removal of USTs from the former naval hospital property to the west of the subject property. They concluded the risk of impact from a release associated with the USTs was minimal due to the significant distance and down-gradient position relative to the subject property. • AESI noted the presence of hydraulic hoists in the auto shop, but did not observe evidence of a release in this area or anywhere else on the subject property. • AESI concluded that there were no identified RECs associated with the subject property. • EHSI conducted a site visit on February 15, 2011 and identified the following potential environmental concerns through visual observations and interviews: (1) an emergency generator diesel UST may be located along the west side of the main school building; (2) a basement level transformer room was observed in the main school building; and (3) debris material was reportedly encountered in the southeast quadrant of the subject property near the new temporary portable classrooms. EHSI recommended that these potential concerns be addressed during site redevelopment. 4.2 Ongoing Environmental Investigation EHSI has been conducting an Independent Remedial Action since April 2014 due to debris material that was encountered in three different areas on the eastern side of the subject property (buried debris excavation, concrete tank excavation, and additional buried debris excavation) and contamination associated with an underground acid neutralization tank (acid tank excavation). The debris material and acid tank were encountered during redevelopment activities at the subject property. The debris material appears to be associated with the former wastewater and sewage treatment plant and US Naval Hospital. The acid tank was used in the past by the school for disposal of chemicals. A map showing the location of the debris excavations, the acid tank excavation, former naval treatment plant, former school structures, and current school structures is shown in Figure 4.

A summary of remedial activities and results are presented below for the buried debris and acid tank excavations.

4.2.1 Buried Debris Debris Field Excavation

• Debris material was encountered during excavation of a storm-water detention pond. Model Toxics Control Act (MTCA) Cleanup Levels were exceeded in soil samples collected from the debris field excavation for Total Petroleum Hydrocarbons as Gasoline (TPH-G), TPH as Diesel (TPH-D), TPH as Oil (TPH-O), Metals (arsenic, chromium, cadmium, lead, and mercury), and

Semivolatile Organic Compounds and Carcinogenic Polyaromatic Hydrocarbons (SVOCs/CPAHs). A total of 4,682 tons of debris material and soil was excavated from this area and confirmation soil samples were below detection limits and MTCA Cleanup Levels. • The release of contamination associated with the debris excavation was reported to Washington State Department of Ecology (Ecology) on July 8, 2014.

Concrete Tank Excavation

• Debris material was also encountered in a concrete tank that was a part of a waste water treatment plant for the US Naval Seattle Hospital. The debris material was sampled and did not exceed cleanup levels for TPH-G, TPH-D, TPH-O, Metals, or SVOCs/CPAHs. • Discolored groundwater was encountered in the concrete tank excavation and tested for TPH-G, TPH-D, TPH-O, Metals including iron, and SVOCs/CPAHs. All of the initial groundwater data was below detection limits and MTCA Cleanup Levels, except for Metals which exceeded cleanup levels for arsenic, chromium, lead, and iron. A filtered groundwater sample was collected and results were below detection limits or MTCA Cleanup Levels. The filtered results show that the high metals results in the original sample were due to an abundance of sediment in the sample. • A total of 249 tons of soil and debris material was excavated from the concrete tank excavation and confirmation soil samples were below detection limits and MTCA Cleanup Levels.

Additional Debris Field Excavation

• Additional debris was encountered south of the debris field excavation. MTCA Cleanup Levels were exceeded for TPH-G, TPH-D, TPH-O, naphthalene, and SVOCs/CPAHs. Approximately 252 tons of debris material was excavated and confirmation soil samples were below detection limits and MTCA Cleanup Levels.

4.2.2 Acid Tank Excavation Sludge from an acid neutralization tank spilled onto the ground during removal. The release of contamination associated with the acid tank excavation was reported to Ecology on September 26, 2014. The following summarizes the soil and groundwater sampling results from this release.

• The sludge sample did not exceed MTCA Cleanup Levels except for the metals chromium, cadmium, lead, and mercury. Subsequent Toxicity Characteristic Leaching Process (TCLP) testing showed that the sludge represented a hazardous waste because the sample failed the TCLP test for lead. • The excavation for the acid tank encountered groundwater and a grab sample was collected. MTCA Cleanup Levels were exceeded for metals, but a filtered sample was also tested and the metals were below detection limits. The groundwater sample also exceeded MTCA Cleanup Levels for TPH-D, TPH-O, and vinyl chloride indicating potential impact to groundwater from these organic contaminants. • Approximately 20 tons of sludge material and soil from the excavation were removed from the site as hazardous waste. Confirmation soil samples from the excavation documented the removal of the sludge contamination.

4.3 Physical Setting Sources 4.3.1 Topography The subject property is located along a topographic ridge with elevations ranging from approximately 405 feet above sea level on the western portion of the subject property to 350 feet above sea level on the southeast corner. Adjacent properties to the east and west are at lower elevations compared to the subject property.

4.3.2 Hydrogeology The subject property is underlain by fill material and glacial sediments (till and outwash) down to a maximum depth of approximately 71.5 feet below grade. There are two water bearing zones beneath the site, one above the till and a deeper zone in the underlying outwash deposits (AESI, 2010). The direction of groundwater flow is unknown, but based on topography may flow to the east/southeast on the eastern portion of the site and to the west on the western portion of the site.

4.3.3 Soils Surface soil information indicates that the subject property is located in an area mapped as Alderwood gravelly, sandy loam. This soil type has slow infiltration rates and moderate drainage rates (EDR, 2014).

4.3.4 Sensitive Receptors Shorecrest High School, the subject property, is a listed sensitive receptor. Four other nearby sensitive receptors were identified within approximately 1/8 mile of the subject property (EDR, 2014). These sensitive receptors are as follows:

• Kellogg Middle School is located approximately 500 feet north of the subject property. • Shoreline Christian School is located approximately 1/8 mile south of the subject property. • Washington State DOH Laboratory is located approximately 800 feet southwest of the subject property. • Fircrest School is located adjacent to the west of the subject property.

4.3.5 Flood Plains The subject property lies outside of the 100 and 500 year floodplains (EDR, 2014). 4.4 Environmental Record Sources

A Radius Map report was obtained from EDR for use in preparation of this Phase I ESA report. The EDR report was obtained to fulfill the requirements pertaining to standard environmental record sources as well as supplementary information considered here as additional environmental records. A copy of the EDR database report is presented in its entirety in Appendix B.

The following federal, state and tribal environmental databases were reviewed as part of this investigation.

• Federal National Priority List (NPL) • Federal Delisted NPL List

• Federal Comprehensive Environmental Response, Compensation, and Liability Act Information System (CERCLIS) • Federal Institutional Controls/Engineering Controls Registries • Federal Emergency Response Notification System (ERNS) List • State and Tribal Leaking Storage Tank Sites • State and Tribal Registered Storage Tank Lists • State and Tribal Voluntary Cleanup Sites • Local Lists of Landfill/Solid Waste Disposal Sites • Local Lists of Hazardous Waste/Contaminated Sites • Local Land Records • Records of Emergency Release Reports • Federal CERCLIS No Further Remedial Action Planned (NFRAP) Sites List • Federal Resource Conservation and Recovery Act (RCRA) Information System-Corrective Action (CORRACTS) Facilities List • Federal RCRA Non-CORRACTS Transporters, Storage, and Disposal (TSD) Facilities List • Federal RCRA Generators List • State- and Tribal-Equivalent NPL • State- and Tribal-Equivalent CERCLIS • State and Tribal Landfill and/or Solid Waste Disposal Sites Lists • State and Tribal Institutional Control/Engineering Control Registries • State and Tribal Brownfields Sites • Local Brownfields Lists • EDR High Risk Historical Records • Other Ascertainable Records

4.4.1 Subject Property The subject property was listed in several databases for the main school address (15343 25th Ave NE) and the detached parcel (NE 158th and 20th Ave). A discussion about these databases is presented below.

• RCRA Non-Generatory (NonGen)/No Longer Reporting (NLR) regulatory listing – The subject property has generated hazardous waste in the past, but does not presently do so. The last notification of activity was December 31, 2003. No violations were found in the file. • Facility Index System/Facility Registry System (FINDS), Facility/Site identification System (ALLSITES) listings – The subject property was listed as a hazardous waste generator with dates of activity on April 17, 2001 and April 20, 2011. • Reported Spills (Spills) – A spill of motor oil occurred on October 31, 2012. The spill was described as impermeable and contained. • National Pollutant Discharge Elimination System (NPDES) Water Quality Permit System Data – The subject property has a construction surface water permit that became active on May 31, 2011. The permit expires on December 31, 2015. • ALLSITES and UST listings – The detached parcel was listed for a UST. The tank was single walled and installed on July 1, 1961. It was removed on August 6, 1996.

4.4.2 Adjacent Properties • Database findings indicate that there are three facilities located within 1/8 of a mile from the subject property. All of these are located at lower elevations than the subject property and likely in down-gradient positions with respect to groundwater flow. Documented or suspected releases from these sites would likely not impact the subject property. A brief discussion of these sites is presented below:

o Fircrest School is listed at 15230 – 15th Avenue Northeast, which is immediately west of the subject property. Fircrest is listed on the RCRA Conditionally Exempt Small Quantity Generator (RCRA-CESQG), FINDS, ALLSITES, Confirmed and Suspected Contaminated Sites List (CSCSL), No Further Action (NFA), UST and Manifest Data (MANIFEST) databases. There are reported to be two UST’s on the site currently. Five have been previously removed and two were closed in place. The current UST’s (those closed in place) were installed in 1964 while two of the removed UST’s were installed in 1959 and the other three in 1978. All UST’s removed or closed in placed were reported complete on August 8, 1996.

o Public Health Labs is listed at 1610 – NE 150th Street, which is southwest of the subject property. Public Health Labs is listed on the CSCSL, ALLSITES, UST and Leaking Underground Storage Tank (LUST) and MANIFEST databases. EDR documented that there has been a release to the environment associated with a LUST from this non- adjoining parcel. One UST is reported to have been installed in 1984 and removed on May 23, 2013. Currently one registered 5,000 gallon UST is associated with this site which was installed in 2013.

o King County North Rehabilitation Facility is listed at 2002 – Northeast 150th Street, which is southwest of the subject property. This facility appears on the RCRA NonGen/NLR, ALLSITES and MANIFEST databases. 4.5 Historical Use – Subject Property and Adjoining Properties The following discussions are presented for the purpose of compiling historical information on the activities that occurred on the subject property and adjacent properties.

4.5.1 Aerial Photographs Historic aerial photographs obtained through EDR and dated 1944, 1948, 1952, 1965, 1977, 1980, 1990, 2006, 2009 and 2011 were reviewed as part of this assessment. Copies of the historical aerial photos are presented in Appendix C. The results of this review are included in the following table.

Table 4.5.1-1: Aerial Photographs Review Year Subject Property Use Adjacent Property Use Most of the subject property appeared A large complex of buildings in clustered rows identified forested. A roadway system, three in historic records as the Seattle Naval Hospital was circular objects, and two structures present adjacent to the west of the subject property. were present on the southeast Additional buildings were under construction in the quadrant of the subject property. A central portion of the hospital complex. The parcels roadway bisected the western portion adjacent to the south of the subject property appeared 1944 of the subject property from south to a mostly vacant with the exception of several scattered circular object to the north. A square- residences. Lightly forested land was visible across 25th shaped and a rectangular-shaped Avenue NE to the east of the subject property. A circular building were present on the structure connected by roadways to the naval hospital northwest island of the subject was present, adjacent to the north of the subject property property. with vacant land beyond. This oblique-view aerial photo shows the central portion of the subject The central portion of the hospital complex to the west of property remaining vacant. A large the subject property has been filled in with buildings. A Aboveground Storage Tank (AST) building with several smokestacks was visible in the 1948 curving road ways and several smaller hospital complex adjacent to the southwestern portion of buildings were present on the the subject property. A water tower was visible adjacent southeast quadrant of the subject to the northwest of the subject property. property. The northwestern “island” of the subject property was not shown. Four north-to-south oriented The existing neighborhood of single-family residences was rectangular buildings and six circular visible across 25th Avenue NE to the east of the subject objects were visible on the southeast property. Land use to the south of the subject property quadrant of the subject property. Two appeared consistent with the previous photo. A baseball 1952 warehouse buildings were present on field was developed to the north of the northwest island the northwest island of the subject of the subject property. No significant changes to land use property. The remainder of the subject were identified for the hospital complex adjacent to the property appeared forested. west of the subject property. A complex of school buildings covered the eastern half of the subject property and replaced the earlier buildings and circular objects. A track and baseball Grading and clearing was evident adjacent to the north of field were developed across the the subject property with a complex of school buildings western half of the subject property. A beyond. A group of Y-shaped buildings was added to the 1965 rectangular structure was present on hospital complex to the west of the subject property. the southwest corner of the subject Land use to the south and east of the subject property property. A group of five service remained consistent with the 1952 photo. buildings was present on the northwest island of the subject property. No changes to land use were noted for the surrounding The subject property remained 1969 properties except that ball fields have been completed unchanged. adjacent to the north of the subject property. No significant land use changes were noted for adjacent 1977 No changes from 1969. properties. 1985 No change. No changes to surrounding land use were noted.

Table 4.5.1-1: Aerial Photographs Review Year Subject Property Use Adjacent Property Use Several structures to the SW of the site beyond a row of E-W running rectangular buildings have been demolished. 1990 No change. No other significant changes noted to surrounding properties. The Theater Building was constructed in the late 1990s and connected to the north end of the main classroom building. The row of E-W running rectangular buildings to An addition to the north end of the the SW of the site have been demolished and the land 2006 main classroom building was noted.. cleared. A new semi-square structure has been built just west of that with buildings to the north and south of it removed. No other significant changes noted to surrounding properties. 2009 No change. No significant changes noted to surrounding properties. 2011 No change. No significant changes noted to surrounding properties.

4.5.2 Fire Insurance Maps Historic Sanborn fire insurance maps were not available for the vicinity of the subject property. A copy of the EDR Sanborn Map report is presented in Appendix D.

4.5.3 Historic Topographic Maps Historic topographic maps obtained through EDR dated 1894, 1895, 1897, 1909, 1949 and 1968 were reviewed as part of this assessment. Copies of the historical topographic maps are presented in Appendix E. The results of this review are included in the following table.

Table 4.5.3-1: Historic Topographic Maps Review Year Subject Property Use Adjacent Property Use 1894 The subject property was not shown. Surrounding land appears undeveloped. 1895 The subject property was not shown. Surrounding land appears undeveloped. 1897 The subject property was not shown. Surrounding land appears undeveloped. 1909 The subject property was not shown. Surrounding land appears undeveloped. Property is largely undeveloped except Firland Sanatorium present on west side of subject for a water tank in the NE quadrant, property with several rectangular buildings. Multiple 1949 the sewage disposal plant in the single family residential dwellings are noted along the central east area and scattered east beyond 25th Avenue NE. Forested areas noted to the buildings to the south. north and south. Firland Sanatorium present on west side of subject Shorecrest High School shown on property with several rectangular buildings. Multiple 1968 property. Sewage plant is no longer single family residential dwellings are noted along the evident. east beyond 25th Avenue NE. Forested areas noted to the north and south. Firland Sanatorium buildings with Fircrest school on west Shorecrest High School shown on side of subject property. Hamlin park noted to the north, 1983 subject property. with another forested park to the south. Residential area to the east beyond 25th Avenue NE.

4.5.4 Local Street Directories Cole and Polk city directories were reviewed by EHSI. These directories were provided by EDR. The directories that were reviewed include the following: Cole information services directories were dated 2005 and 2008 with Polk city directories dated 1951, 1956, 1961, 1966, 1970, 1975, 1980, 1985, 1990, and 1994. A summary of the city directory reviews are presented below. Note the EDR city directory report includes tenants dating back to 1935; however, the associated address was not on the subject property. A copy of the street directories is provided in Appendix F.

Table 4.5.4-1: Occupants Listed at Subject Property Source Date Listed Occupants Cole 2008 Shorecrest High School, Shoreline School District 412 Cole 2005 Shorecrest High School, Washington Pipers Association Polk 1985 Shorecrest Senior High School Polk 1981 Shorecrest Senior High School Polk 1975 Shore Crest Senior High School Polk 1969 Shore Crest Senior High [School]

4.6 Federal Databases 4.6.1 National Archives and Records Administration EHSI obtained Seattle National Archives and Records Administration (NARA) records for Shorecrest High School and the west adjacent parcel. Note, both subject property and west adjacent parcel were considered one parcel prior to founding of Shorecrest High School. A summary of the relevant records are presented below.

Lease Nod-2509. 1941. Between the State of Washington and the United States of America (USA) for 160 acres of land to be used as a Naval Shore Establishment (Lease Nod-2509, 1941).

Letters between US Navy and King County Regarding Covering Open Storm Drainage to Thornton Creek. Series of letters between 1945 to 1947 are summarized below: • Telegram from Budocks in Washington DC to Commandant, Thirteenth Naval District in Seattle, dated January 24, 1945. Written to Lieutenant Eugene J Wilson asking if the Navy has any legal obligation to cover a storm drain leading from the Naval Hospital to Thornton Creek in referred letter to BUMED, dated December 1944. The Navy has no record of King County Permit No. 1766142 and requests the lieutenant obtain one. • Letter from Commandant, Thirteenth Naval District to Chief of the Bureau of Yards and Docks, dated February 16, 1945. Letter points out that on March 16, 1942, King County granted the Navy Permit 1766142 to construct and maintain a 30-inch sewer conduit pipe (drainage only) and a three foot wide open ditch which discharges to Thornton Creek. King County has requested the enclosure of the open sewer based on the demands of local residents to improve the roadway along which the open ditch was constructed. The County feels ‘the Navy is primarily, but not legally bound to remedy the situation it has created.’ The Navy’s position was that it was under no legal obligation to enclose the open portion of this storm sewer. • Letter from Prosecuting Attorney of King County, WA to Rear Admiral G.H. Fort, USN. 1947. Letter stating the ruling of the Navy Legal Department on storm drainage matter is rejected and

that the County Engineer’s Office will be instructed to enclose the open drain unless the Navy saw fit to accomplish the work. The Rear Admiral is requested to resubmit this matter to the Navy Department for ‘reconsideration and appropriate action thereon.’ (Letters, 1945-1947)

Interim Use Permit. 1947. Transfer of property from the US Navy to King County, WA. The following previous leases and land acquisitions were described: • Lease NOd-2509, State of Washington Department of Public Lands to the USA, dated December 15, 1941, for 160 acres; • Lease NOy(R)-39,337, State of Washington Department of Public Lands to the USA, dated June 30, 1945, for a 12.3 acre tract of adjoining land. The Navy Department declares all property and facilities comprising the Naval Hospital surplus, except for three officer quarter buildings (No. A, B and C) to be granted to King County for the establishment of a tubercular patient hospital. (Interim Use Permit, 1947).

Renewal of Government Lease. 1948. Lease dated March 26, 1948, between the State of Washington and the USA for the 160 acre land portion, for hospital purposes (Renewal of Government Lease, 1948).

Original Protection and Maintenance Inspection Report. 1948. An inspection report dated November 10, 1948, details deficiencies noted on the naval compound before transfer of property to King County. Findings include: • The entire facility, with the exception of housing structures No. A, No. B and No. C had been leased to King County under Interim Permit No. (R) 43-204. • There are approximately 85 structures which appear to be in good condition except for dry rot, which appears to be excessive. • Buildings 567 (Storehouse 7) and 568 (Storehouse 8) are noted to have poor housekeeping with property dumped ‘promiscuously, without aisles or means of entrance.’ The report recommends that the warehouses be cleaned/overhauled and the materials within be stored as to provide aisle and access space. *Note, these warehouses are located in the vicinity of where the SE debris field was found and excavated during the demolition of the old school building project. • Diesel generators are located in buildings 526 (Power House), 588 (Standby power for buildings 502, 505, 506 and ½ of 512) and 536 (Ejector Building). • The Naval Hospital’s sewage plant effluent discharge is located on E 150th Street and discharges to Lake Washington. (Inspection Report, 1948)

Appraisal Report – Volume I. 1948. An appraisal report completed by the Seattle Regional Office of the War Assets Administration, dated December 15, 1948, noted that at the conclusion of WWII, the US Naval Hospital was deemed no longer necessary. By virtue of this, a Revocable Permit dated November 3, 1947, was issued to King County, Washington for occupancy of all buildings, equipment and supplies comprising this hospital facility for use as a sanatorium. On Thanksgiving Day, 1947, the sanatorium abandoned its former facility and moved 399 patients to the Naval Hospital. (Appraisal I, 1948)

Appraisal Report – Volume II. 1948. An appraisal report completed by the Seattle Regional Office of the War Assets Administration, dated December 15, 1948, notes the Naval Hospital was originally designed to accommodate 1,400 patients and that the sanatorium is currently being operated by the citizens of King County through a Board of Managers. It has seven members which are appointed by the Board of County Commissioners. (Appraisal II, 1948)

Cancellation of Lease and Release. Lease No. WS-11(p)-227, Formerly Nod-2509. 1950. Contract, dated April 25, 1950, between State of Washington and King County terminating the lease with the USA and transferring land underlying the hospital to King County (Cancellation, 1950).

Agreement of Retransfer. 1968. Contract, dated March 28, 1968, between the USA and King County transferring six former Naval Hospital buildings to the Shoreline School District. King County purchased buildings 519, 520, 521, 522, 554 and 566 from the USA and sold them to the Shoreline School District (Retransfer, 1968).

4.6.2 USA EPA Region X One document was obtained from the Freedom of Information Act (FOIA) request to US Environmental Protection Agency (USEPA) for the subject property.

RCRA Site Detail Report, run date May 9, 2014. The Shorecrest High School is not listed with the Environmental Protection Agency (EPA) as being a hazardous waste generator or transporter (EPA, 2014). 4.7 State and Local Records 4.7.1 Puget Sound Regional Archives EHSI obtained historical King County Assessor tax card information from the Washington State Archives on April 29, 2014. Copies of the historical tax records and photos are included in Appendix G of this report. The following information was found in the archive tax records:

Includes Shorecrest High School and adjacent property to west • Tax sheet for Building #1 (Administration and School) describes a one story building with a post and pier with concrete foundation and a central hot water heating system. Built in 1943 and remodeled in 1960 and 1967, this structure is 50,988 ft2. A hand written note, dated September of 1954, states this building was an ‘old Navy Hospital Building converted to school buildings.’ Another hand written note, dated July 11, 1960, states a library had been added to Bldg. 1 with the same type construction. A 1967 note states new additions are the same construction and quality of original construction. Year of assessment(s) not found on sheet. • Tax sheet for Building #2 (Warehouse) describes a one story building with a post and pier and concrete foundation and a pipeless furnace heating system. Hand written notes state the steam heat comes from Firland. Another hand written note, dated October 1970, states ‘old garage (Bldg #3) torn down some time ago’. Built in 1953 and remodeled in 1960 (addition added), this structure is 6,103 ft2. Year of assessment(s) not found on sheet. Later sheets, dated January 9 and 15, 1974, call this building the Educational Service Center Warehouse Bldg. #2. • Tax sheet for Building #3 (Educational Services Metal Shop) describes a one story building with an independent hot water or steam heating system. Built in 1950, this structure is 2,877 ft2. Sheets are dated January 9 and 15, 1974. • Tax sheet for Building #4 (Shop) describes a one story building with ‘Novelty Kind’ siding, concrete slab foundation and a stove heating system. Built in 1950, this structure is 2,520 ft2. Year of assessment(s) not found on sheet. Later sheets, dated January 9 and 15, 1974, calls this building the Educational Service Center Vehicle Storage Bldg. #4. Described as building 3 with steam heat on an undated tax sheet.

• Tax sheet for Building #5 (Garage) describes a one story building with aluminum metal siding, concrete slab foundation and no heating system. Built in 1950, this structure is 1,920 ft2. Assessment year listed on sheet is 1972. Interior rooms are noted as being small offices. Described as a detached garage associated with Building #4 (Shop) above and named Building 4 on an undated tax sheet. Handwritten note on undated tax sheet describes an ‘add on to the north end’ of an unknown date. • Tax sheet for Building #6 (Storage) describes a one story building with steam heat. Built in 1950, this structure is approximately 3,872 ft2. Assessment years listed on sheet are 1962, 1971 and 1972. Described as Building 5 on an undated tax sheet. Later sheets dated January 9 and 15, 1974 call this building the Educational Service Center Storage Bldg. #5 and note a concrete slab foundation. • Tax sheet for Building #7 (Garage and Shop) describes a one story building with asbestos board siding, concrete slab foundation and steam heat. Built in 1959, this structure is 3,520 ft2. Assessment years listed on sheet are 1962, 1971 and 1972. Described as Building 6 on undated tax sheet. Later sheets, dated January 9 and 15, 1974, call this building the Educational Service Center Grounds Bldg. #6. • Tax sheet for Building #8 (Gymnasium) describes a one story building with a concrete slab foundation and cement board siding. The noted steam heating system has a hand written notation that it comes from the central plant. Built in 1958, this structure is 2,450 ft2. Assessment years listed on sheet are 1962, 1971 and 1972. Described as Building 7 on an undated tax sheet. Described as Educational Service Center Carpenter Shop Bldg #7 on tax sheet dated January 9, 1974. • Tax sheet for Building #9 (School Warehouse) describes a one story building with concrete tilt- up siding, concrete slab foundation and a steam heating system. Built in 1966, this structure is 6,407 ft2 and a hand drawn sketch shows rooms used for food and general storage with one small office and a mezzanine. Assessment years listed on sheet are 1968, 1971 and 1972. Described as Building 8 on an undated tax sheet. Described as Educational Service Center Warehouse Bldg. #8 on tax sheet dated January 9, 1974. • Tax sheet for Building #10 (Paint Storage) describes a one story building with concrete block siding, concrete slab foundation and no heating system. Built in 1966, this structure is 720 ft2. Assessment years listed on sheet are 1968, 1971 and 1972. Described as Building 9 on an undated tax sheet. Described as Educational Service Center Paint Spray Bldg. #9 on tax sheet dated January 9, 1974. • Tax sheet, dated December 17, 1973, for the Lawn Storage Building #10 describes a light wood construction structure built in 1940 that’s approximately 336 ft2 in size. • Tax sheet, dated December 17, 1973, for Lawn Equipment Building #11 describes a light wood construction structure built in 1940 that’s approximately 816 ft2. • Tax sheet, dated December 17, 1973, for Paint Shop Building #12 describes a light wood construction structure built in 1940 that’s approximately 2,117 ft2. An independent hot water or steam heating system is noted. • Tax sheet for Building #22 describes a Dining Hall which was converted to a warehouse. Built in 1942, the structure has a post and pier foundation and an independent forced air heating system. A handwritten note states ‘This is Navy Type Ad Bldg. now deteriorated and not maintained and now used for storage by the Shoreline School Dist.’ Tax sheet is dated January 16, 1974.

• Accessory Improvements tax sheets, dated January, 1974, list a two pump service station island, a wood utility building, a 121,250 ft2 of pavement laid and a 2,100 gallon UST storing fuel. All are listed as having been built in 1943. This UST system may be associated with the present gas station at Fircrest.

US Navy officer housing • Tax sheet for Building A (Single Family Dwelling with garage) describes a 1½ story dwelling with cedar siding, concrete slab foundation and a hot water heating system. Built in 1942, this structure is 1,308 ft2. Assessment years listed on sheet are 1966, 1971 and 1972. • Tax sheet for Building B (Single Family Dwelling with partial basement and garage) describes a 2 story dwelling with cedar siding, concrete slab foundation and a hot water heating system. Built in 1942, this structure is 1,308 ft2. Assessment years listed on sheet are 1966, 1971 and 1972. • Tax sheet for Building C (Single Family Dwelling with partial basement and garage) describes a 2 story dwelling with cedar siding, concrete slab foundation and a hot water heating system. Built in 1942, this structure is 1,516 ft2. Assessment years listed on sheet are 1966, 1971 and 1972.

Shorecrest High School – 15343 25th Ave NE • Tax sheet for Building H (School) describes a 1 story structure with brick siding, concrete slab foundation and an electric forced air heating system. Built in 1965, this structure is 12,694 ft2. Assessment years listed on sheet are 1967, 1971 and 1972. Described as building 16 on tax sheet dated January 7, 1974. • Tax sheet for a Class Rooms Building describes a 1 story structure with concrete block siding and a concrete slab foundation. An electric forced air heating system is noted. Attached photograph describes the structure as being comprised of Units A, B, C, D and E. Built in 1961, this structure is 101,752 ft2. Assessment years listed on sheet are 1963, 1971 and 1972. Described as building 13 on an undated tax sheet. • Tax sheet for the Gym and Classrooms Building describes a 1 story structure with concrete and concrete block siding and a concrete slab foundation with a gas forced air heating system. Attached photograph describes the structure as being Unit F. Built in 1961; this structure is approximately 29,350 ft2. Assessment years listed on sheet are 1963, 1971 and 1972. Described as building 14 on tax sheet dated January 7, 1974. • Tax sheet for the Shop and Classrooms Building describes a 1 story structure with concrete block siding and a concrete slab foundation. A forced air heating system is noted. Attached photograph describes the structure as being Unit G. Built in 1961; this structure is approximately 10,464 ft2. Assessment years listed on sheet are 1963, 1971 and 1972. Described as building 15 on tax sheet dated January 7, 1974. • Tax sheet, dated January 7, 1974, for the portable classroom (Bldg. #17) describes a structure of light wood construction with a forced air heating system approximately 960 ft2 in size. Year of construction is stated as 1960. • Tax sheet, dated January 7, 1974, for the portable classroom (Bldg. #18) describes a structure of light wood construction with a forced air heating system approximately 960 ft2 in size. Year of construction is stated as 1960. • Tax sheet, dated January 7, 1974, for the portable classroom (Bldg. #19) describes a structure of light wood construction with a forced air heating system approximately 960 ft2 in size. Year of construction is stated as 1960.

• Tax sheet, dated January 7, 1974, for the portable classroom (Bldg. #20) describes a structure of light wood construction with a forced air heating system approximately 960 ft2 in size. Year of construction is stated as 1960. • Tax sheet, dated January 7, 1974, for the portable classroom (Bldg. #21) describes a structure of light wood construction with a forced air heating system approximately 1,428 ft2 in size. Year of construction is stated as 1960. • Tax report with a log date of Oct. 4, 1997, describes Shorecrest High School as being 43.88 acres in size and consisting of 5 buildings. Building 1 is described as the Main School – Units A, B, C, D and E. Building 2 is described as a Classroom Building – Unit F. Building 3 is described as the Gymnasium – Units G and H. Building 4 is described as a Shop – Unit J. A description of the 5th building was not noted. Noted, building permit activity includes a remodeling permit, dated July 22, 1996, and one, dated September 24, 1985. Sales Activity noted includes a QCD (presumably Quit Claim Deed), dated June 14, 1985, and a Corrective Deed, dated August 12, 1986. Appraisal years listed in report include 1986, 1988, 1990, 1992 and 1993.

4.7.2 WA State Department of Ecology (Ecology) EHSI contacted the Ecology northwest regional office on April 29, 2014 to review files for the subject property and adjacent Fircrest School property to the west. Ecology provided a copy of a tank removal report in regards to the Washington State Department of Health Lab facility west of the subject property. A summary of that document is presented below:

• A 2,000-gallon UST containing diesel was removed. • Extractable Petroleum Hydrocarbons (EPH) were detected in soil, but at concentrations below MTCA Method A Cleanup Levels for Unrestricted Land Uses. • Groundwater was encountered at about 7-feet below grade and a grab sample was collected for analytical purposes. • The detected concentrations of diesel (6,500 milligrams per liter (µg/L)) and oil (700 µg/L) in the groundwater sample exceeded the MTCA Method A Cleanup Level for Groundwater (500 µg/L). • The release to groundwater was reported to Ecology’s LUST representative.

This release to groundwater would likely not impact the subject property because the lab is located lower in elevation compared to the subject property and in an assumed down-gradient to cross-gradient position in regards to groundwater flow.

4.7.3 Seattle Fire Department The Fire Marshal’s Office of Public Disclosure Records Team from the Seattle Fire Department reported they had no record of any USTs or ASTs for the subject property. They also have no record of any hazardous spills occurring at the site (Seattle Fire Department, 2014).

4.7.4 Shoreline Fire Department The Shoreline Fire Department was contacted on June 4, 2014 in regards to available records for the subject property and adjacent Fircrest School to the west. The fire department responded on June 23, 2014 and indicated they had no records for hazardous material spills or leaks (Shoreline Fire Department 2014).

5.0 SUBJECT PROPERTY RECONNAISSANCE 5.1 Methodology and Limiting Conditions An EHSI environmental professional conducted a subject property visit on June 9, 2014, which consisted of a walkover survey of the exterior areas of the new buildings with limited interior areas and adjacent properties. Weather conditions at the time of the visit were overcast and temperatures in the mid-60’s Fahrenheit.

The grounds of the subject property were observed for evidence of surface and subsurface disturbances including waste accumulations and debris, discolored soil, stressed vegetation, unusual mounds or depressions, pipes, standing water, and other indicators of potential contamination. A Subject Property Visit Checklist was filled out to document subject property conditions and is included in Appendix H. Key subject property features were photographed and copies are provided in Appendix I. 5.2 General Subject Property Setting The subject property consists of one parcel that is bound on the west by the Fircrest School and Residential Habilitation Center, forested parks to the north and south, and 25th Avenue NE to the east with single family residences beyond. 5.3 Interior Observations The reviewed portions of the main school building are currently in use for educational purposes. The building is served with a natural gas fired hot water heating system. Floors are either carpet or sheet vinyl. Walls are sheetrock and ceilings are sheetrock, acoustical ceiling tile or decorative slotted wood. 5.4 Exterior Observations The following information documents the exterior observations of the subject property: • Covered trash bins were noted on the exterior of each of the three new school buildings (main school building, gym and theater). One uncovered trash bin was noted on the east end of the remote parcel property. • All three new school buildings appear to be of the same stone brick construction with corrugated metal siding. • A parking lot is located to the north of the main school building with ball fields beyond and to the west. The east and south portions of the property are currently part of a construction zone where the old school is undergoing demolition. • An electrical transformer for the old school was being removed from an underground vault as part of the demolition project. No evidence of environmental concerns were noted. (Appendix I, Picture 2). • No evidence of a diesel UST along the west side of the main school structure was detected. • An above ground pad mounted propane tank was observed at the detached parcel property. No external secondary containment means was noted for the tank. According to Phil Plumis, this is used for torch down roofing repairs. 5.5 Adjacent Properties The following properties were noted adjacent to the subject property:

• Located north of the subject property is Hamlin Park. • Located east of the subject property is 25th Avenue NE with single-family residences beyond. • Located south of the subject property is South Woods Park. • Located west of the subject property is the Fircrest School and Residential Habilitation Center. A steam plant and gas station were observed with the ASTs. Minor staining was observed near the dispensers at the pump island. 6.0 INTERVIEWS An interview with the subject property owner’s representative was conducted on June 9, 2014.

6.1 Interview with Owner The current owner is the Shoreline School District. A representative was provided for interview. See section 6.2 below. 6.2 Present and Past Subject Property Manager Interview(s) Recently retired Shoreline School District employee, Paul Plumis, was provided for interview. Positions held within the school district include District Transportation Director from 1989 to 1996, Director of Maintenance and Custodians from 1996 to 2005 and Capitol Projects Coordinator from 2005 to 2013. The interview was conducted in person on June 9, 2014. Key information from that interview is presented below:

• The subject property used to be occupied by the US Navy who is believed to have used the property to dump waste. • No spills or leaks are known to have impacted the subject property from any of the adjacent properties. • Previous excavations to build the ball fields uncovered buried debris material including glass bottles and hypodermic needles. • No asbestos or lead is believed to be present in the 3 new school buildings. • No storage tanks are believed to have been used with the old or to be used with the new school buildings. • A minimal quantity (500 grams) of hazardous waste is disposed of from the subject property approximately every year. This is from chemicals used for educational purposes. • There are no recorded environmental liens or activity use limitations for the subject property. • There are no environmental concerns for the subject property. • There have been no reported releases of hazardous substances at the subject property. • The subject property has been used as a school since 1961. 6.3 Bonafide Prospective Purchaser Interview(s) The property is not under the process of being purchased, therefore, no prospective purchaser interview was conducted. 6.4 Local Government Official Interview(s) No local government officials were interviewed.

6.5 Interviews with Others No other persons were interviewed during the course of this Phase I ESA.

7.0 DATA GAPS A data gap is defined by ASTM E 1527-13 as a lack of or inability to obtain information required by this practice despite good faith efforts by the Environmental Professional to gather such information. Data gaps may result from the incompleteness in any of the activities required by this practice including, but not limited to, the subject property reconnaissance, interviews, and historical research. Failure to achieve the historical research objectives identified in the standard is termed a data failure and is a type of data gap. For this project, no data gaps were encountered. 8.0 CONCLUSIONS EHSI has performed a Phase I ESA in conformance with the Scope and Limitations of ASTM Practice E 1527-13 for the subject property located at 15343 25th Avenue Northeast in Seattle, Washington. Any exceptions to, or deletions from, this practice are described in Sections 7.0 and 9.0 of this report. This assessment has revealed no evidence of RECs in connection with the subject property with the exception of the following:

• During the interview with Mr. Paul Plumis, EHSI learned that there may be more buried debris in the ball fields located on the western side of the subject property. The buried debris may be contaminated and as such represents a potential environmental concern for the subject property. • The groundwater sample collected from the acid tank excavation was contaminated with TPH compounds and vinyl chloride above MTCA Cleanup Levels. The groundwater sample was collected as a grab sample directly from the excavation and is not considered a true representative sample of groundwater quality in this area. However, the groundwater data does indicate potential impact to groundwater quality associated with the acid tank removal. • The Shoreline School District Warehouse located at NE 158th and 20th Avenue had an UST which was registered with Ecology. The UST was installed in 1961 and reported as removed on August 6, 1996. No record was found to indicate any confirmation sampling or testing was conducted post removal. As such, the UST site poses a threat of possible past material release. 9.0 DEVIATIONS No subject property-specific conditions were encountered that required deviation from the scope of services addressed in Section 1.2 of this report. 10.0 REFERENCES Appraisal I. 1948. Appraisal Report-Volume I. December 15, 1948.

Appraisal II. 1948. Appraisal Report-Volume II. December 15, 1948.

Associated Earth Sciences, Inc. 2009. Phase I Environmental Site Assessment – Shorecrest High School.

Associated Earth Sciences Inc. 2010. Subsurface Exploration, Geologic Hazards, and Final Geotechnical Engineering Report – Proposed Shorecrest High School Renovation.

ASTM International. 2013. Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process. American Society for Testing and Materials. ASTM E 1527-13, 47p. Booth et. Al. 2009. Geologic Map of Northeastern Seattle (Part of the Seattle North 7.5’x15’ Quadrangle, King County). US Geological Survey.

Cancellation. 1950. Cancellation of Lease and Release. Lease No. WS-11(p)-227, Formerly Nod-2509. April 25, 1950.

EDR. 2014. 15343 – 25th Avenue Northeast, Seattle, Washington. Inquiry #3913863.

Ecology. 2014. On-line water well log viewer.

EHSI. 2011. Review of a Phase I ESA. Letter report to client.

EPA. 2014. RCRA Site Detail Report. May 9, 2014.

Inspection Report. 1948. Original Protection and Maintenance Report. November 10, 1048.

Interim Use Permit. 1947. Transfer of property between King County, WA and US Navy.

King County, WA. 1947. Interim Use Permit. Transfer of property between King County, WA and the U.S. Navy. Record contained in files at Seattle NARA.

King County, WA. 1950. Cancellation of Lease and Release. Lease No. WS-11(p)-227, Formerly Nod-2509. Record contained in files at Seattle NARA.

King County, WA. 1954-1997. King County Tax Cards.

King County, WA. 1968. Agreement of Retransfer. Record contained in files at Seattle NARA.

Lease Nod-2509. 1941. Lease between State of WA and United States of America.

Letters. 1945-1947. Letters between US Navy and King County regarding covering open storm drainage to Thornton Creek.

Original Protection and Maintenance Inspection Report. 1948. Record contained in files at Seattle NARA. (Commissioner or owner of report unknown)

Plumis, Paul, 2014. Personal communication between Paul Plumis and Lisa Kollasch of EHSI.

Renewal of Government Lease. 1948. Between the State of WA and United States of America. March 26, 1948.

Retransfer. 1968. Agreement of Transfer. March 28, 1968.

Seattle Fire Department. 2014. FOIA made by EHSI for the Shorecrest HS site. June 4, 2014.

Shoreline Fire Department. 2014. Email communication between the Shoreline Fire Department (Courtney Nicholl) and EHSI (Lisa Kollasch). June 23, 2014. .

State of WA. 1941. Lease Nod-2509. Between the State of Washington and the United States of America. Record contained in files at Seattle NARA.

State of WA. 1948. Renewal of Government Lease. Between the State of Washington and the United States of America for the 160 acre land portion, for hospital purposes. Record contained in files at Seattle NARA.

USA. 1945-1947. Letters between US Navy and King County Regarding Covering Open Storm Drainage to Thornton Creek. Records contained in files at Seattle NARA.

US Navy. 1948. Appraisal Report – Volume I. Record contained in files at Seattle NARA.

US Navy. 1948. Appraisal Report – Volume II. Record contained in files at Seattle NARA.

11.0 SIGNATURE We declare that, to the best of our professional knowledge and belief, we meet the definition of an Environmental Professional as defined in Section §312.10 of 40 CFR Part 312. We have the specific qualifications based on education, training, and expertise to assess a property of the nature, history, and setting of the subject property. We have developed and performed the All Appropriate Inquires in conformance with the standards and practices set forth in 40 CFR Part 312.

Jason Cass Date Washington Licensed Geologist

Kurt Easthouse Date Washington Licensed Geologist

Figures

APPROXIMATE SCALE IN FEET IN SCALE APPROXIMATE

600' 300' 0 0 LOCATION PROPERTY

APPROXIMATE SCALE IN FEET IN SCALE APPROXIMATE

600' 300' 0 0

APPROXIMATE SCALE IN FEET IN SCALE APPROXIMATE

700' 350' 0 0

N N

LEGEND

NOTE: LOCATION OF HISTORICAL BUILDINGS IS APPROXIMATED FROM HISTORICAL AERIALS DATED 1944 & 1952, AND SITE PLANS DATED 1946.

0 150' 300'

APPROXIMATE SCALE IN FEET