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HomeMy WebLinkAboutPermit PL11-058 - SEATAC MOTORS (FORMERLY) - SOIL REMEDIATIONSEATAC MOTORS 14120 TUKWILA INTL BLVD PLI 1-058 EII-012 SEPA / ENVIRONMENTAL IMPACT STATEMENT City of . ukwila Department of Community Development 6300 Southcenter Boulevard, Suite #100 Tukwila, Washington 98188 Phone: 206-431-3670 Fax: 206-431-3665 Web site: http://www.TukwilaWA.ov DETERMINATION OF NON -SIGNIFICANCE (DNS) File Number: E 11-012 Applied: 12/21/2011 Issue Date: 07/26/2012 Status: APPROVED Applicant: SEATAC MOTORS (FORMERLY) Lead Agency: City of Tukwila Description of Proposal: SEPA review for removal to underground storage tanks. Location of Proposal: Address: Parcel Number: Section/Township/Range: 14120 TUKWILA INTERNATIONAL BL TUKW 1523049123 The City has determined that the proposal does not have a probable significant adverse impact on the environment. An environmental impact statement (EIS) is not required under RCW 43.21 c.030(2) (c). This decision was made after review of a completed environmental checklist and other information on file with the lead agency. This information is available to the public on request. This DNS is issued under the option DNS process in WAC 197-11-355. There is no further comment period. Jack P.. e, ' esponsib ' Official Date City o kwila 6300 Southcenter Blvd Tukwila, WA 98188 (206)431-3670 Any appeal shall be linked to a specific governmental action. The State Environmental Policy Act is not intended to create a cause of action unrelated to a specific governmental action. Appeals of environmental determinations shall be commenced within the time period to appeal the governmental action that is subject to environmental review. (RCW 43.21C.075) ENVIRONMENTAL IMPACT STATEMENTS (EIS) City of Tukwila Jim Haggerton, Mayor Department of Community Development Jack Pace, Director NOTICE OF DECISION To: Leobardo Chaidez, Associated Environmental Group, LLC Ben Carol Land Development Corp., Owner State Department of Ecology, SEPA Division King County Assessor PROJECT: 14201 Tukwila Intl. Blvd. - Soil Remediation Project FILE NUMBERS: El 1-012 (SEPA), PL11-058 (Project File) ASSOCIATED FILES: PW11-095 (Public Works Permit) APPLICANT: Leobardo Chaidez, Associated Environmental Group, LLC REQUEST: Environmental review of excavation of approximately 500 cubic yards of petroleum - contaminated soil and replacement of the excavated soil with approximately 500 cubic yards of new fill. Contaminated soil will be disposed of off -site, and the area will be paved after excavation and fill are completed. Work has already been completed prior to obtaining permits. This review is being conducted to comply with code requirements. LOCATION: This notice is to confirm the decision reached by Tukwila's SEPA Official to issue a Determination of Non -significance (DNS) for the above project based on the environmental checklist and the underlying permit application. Project materials including the application, any staff reports, and other studies related to the permits are available for inspection at: Tukwila Department of Community Development 6300 Southcenter Blvd., Suite 100 Tukwila, WA 98188 Monday through Friday 8:30 a.m. - 5:00 p.m. The project planner is Jaimie Reavis, who may be contacted at (206) 431-3670 for further information. The decision is appealable to the Superior Court pursuant to the Judicial Review of Land Use Decisions, Revised Code of Washington (RCW 36.70C). 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone 206-431-3670 • Fax 206-431-3665 City of Tukwila a Jim Haggerton, Mayor Department of Community Development Jack Pace, Director FINAL STAFF EVALUATION FOR ENVIRONMENTAL CHECKLIST File No: E11-012 I. SUMMARY OF PROPOSED ACTION The proposed action is to excavate approximately 500 cubic yards of petroleum -contaminated soil, replace contaminated soil with approximately 500 cubic yards of clean fill. Contaminated soil will be disposed of off -site, and the area will be paved after excavation and fill are completed. The work previously described has already been completed under the State Department of Ecology's (DOE) Voluntary Cleanup Program (VCP) authorized by the Model Toxics Control Act (MTCA), Chapter 70.105D RCW, and its implementing regulations, Chapter 173-340 WAC prior to obtaining permits from the City of Tukwila. This review is being conducted to comply with code requirements. II. GENERAL INFORMATION Project Name: 14201 Tukwila Intl. Blvd. - Soil Remediation Project Applicant: Leobardo Chaidez, Associated Environmental Group, LLC Location: 14201 Tukwila Intl. Blvd. (parcel #152304-9123) Zoning and Comprehensive Plan Designation: Neighborhood Commercial Center (NCC) The following information was considered as part of review of this application: 1. SEPA Checklist and ESA screening checklist (No date, received by City of Tukwila on December 21, 2011). 2. Preliminary Site Characterization Conducted on the Former SeaTac Motors/Shell Oil, Ecology Facility ID No. 46867318, 14120 Tukwila International Blvd., Tukwila, Washington, dated March 19, 2010. 3. Interim Site Remediation & Supplemental Remedial Investigation Conducted on: Former SeaTac Motors/Shell Oil, Ecology Facility ID No. 46867318, 14120 Tukwila International Blvd., Tukwila, Washington. NOTE: Technical reports and attachments referenced above may not be attached to all copies of this decision. Copies of exhibits, reports, attachments, or other documents may be reviewed and/or obtained by contacting Jaimie Reavis, Assistant Planner, 6300 Southcenter Boulevard, Suite 100, Tukwila, Washington, 98188; Phone: (206) 431-3659. 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone 206-431-3670 • Fax 206-431-3665 III. REVIEW PROCESS The proposed action is subject to State Environmental Policy Act (SEPA) review as the project does not meet the exemptions listed under WAC 197-11-800. IV. BACKGROUND/PROPOSAL This proposal is to excavate and replace approximately 500 cubic yards of soil on a site approximately 0.69 acres in size, located on the east side of Tukwila International Blvd at S. 142nd Street. The site was originally developed in the 1950s and was formerly used as a retail gasoline station with automotive repair services. Several underground storage tanks (USTs) were formerly located on the project site, and included two 3,000-gallon gasoline fuel USTs and two 500-gallon USTs for heating oil and waste oil. These USTs were removed in the 1980s and 1990s. Soil and groundwater tests conducted after removal of the tanks indicated that areas of the site were contaminated at levels above those established by the State Department of Ecology (DOE) under the Model Toxics Control Act (MTCA). In their Preliminary Site Characterization, Associated Environmental Group (AEG) found the site to be contaminated with petroleum and diesel hydrocarbons, as well as benzene and other volatile organic compounds. AEG recommended the site be enrolled into the Department of Ecology Voluntary Cleanup Program for development of a cleanup action plan for the site. AEG also recommended the property owner consider soil excavation as a cleanup remedial action to remove impacted soil from the site. In Fall 2011, a member of the public noticed a large amount of excavation occurring on site and requested information on the project. The City did not have a permit application on file related to the project, and a Public Works Inspector was sent out to the site for an investigation. At the site investigation, the Public Works inspector notified the person(s) on the site doing excavation and hauling that a permit was required. The excavation, fill and repaving of the site occurred prior to the property owner's application for a Public Works or SEPA permit. The project is currently under review as part of this application and a Public Works construction permit to meet code requirements. V. REVIEW OF THE ENVIRONMENTAL CHECKLIST The following lists the elements contained within the Environmental Checklist submitted for the proposed project. The numbers in the staff evaluation correspond to the numbers in the Environmental Checklist. If staff concurs with the applicant's response, this is so stated. If the response to a particular item in the checklist is found to be inadequate or clarification is needed, there is additional staff comment and evaluation. A. BACKGROUND: 1- Soil remediation project located at 14120 Tukwila International Blvd (formerly SeaTac Motors, currently UT&T). JR Page 2 of 5 07/23/2012 H:\SEPA\SeaTac Motors Soil Remediation\SR_E11-012_PL11-058.doc 2- Concur with checklist. 3- No preparation date provided; checklist and application materials were submitted to the City of Tukwila on December 21, 2011. 4- Concur with checklist. 5- Work has already been completed. Following SEPA issuance, the applicant must receive permit approval and all required inspections for the Public Works permit. A final soils remediation report will be completed once ongoing monitoring is completed. 6- Concur with checklist. 7- Preliminary Site Characterization Conducted on the Former SeaTac Motors/Shell Oil, Ecology Facility ID No. 46867318, 14120 Tukwila International Blvd., Tukwila, Washington (AEG, March 19, 2010); UST Closure Report, Former SeaTac Motors/Shell Oil Site, 14120 Pacific Highway South, Tukwila, Washington (Columbia Environmental, Inc., 1997); Notice of Permanent Closure of Underground Storage Tanks, Five and Ten Rentals, 14120 Pacific Highway South, Seattle, Washington (DOE, 1990); Underground Storage Tank Closure and Assessment Notice, Former SeaTac Motors Site, 14120 Pacific Highway South, Tukwila, Washington, (DOE, 1997); Toxics Cleanup Program (VCP) Integrated Site Information Systems (ISIS) UST Site/Tank Data Summary, Facility ID No. 46867318, 14120 Pacific Highway South, Seattle, Washington (DOE, 2010); Interim Site Remediation & Supplemental Remedial Investigation Conducted on: Former SeaTac Motors/Shell Oil, Ecology Facility ID No. 46867318 (AEG, April 17, 2012). 8- Yes — Tukwila Public Works construction permit PW11-095. 9- Approval of Tukwila Public Works construction permit PW11-095. 10- Removal and replacement of approximately 500 cubic yards of contaminated soil. The site was repaved after the excavation and fill was done. 11-12 - Concur with checklist. B. ENVIRONMENTAL ELEMENTS: 1. Earth: a-f - Concur with checklist. g — Approximately 90% estimated from aerial photo of the site on NW Maps. The site is almost completely paved, except for structures and an area with vegetation a on the northern portion of the site. h - Concur with checklist. 2. Air: a - Applicant is required to obtain all relevant permits from Puget Sound Clean Air Agency to address any emission to the air associated with this project. b - Concur with checklist. c - Applicant shall obtain all necessary permits and follow all state and federal laws related to reducing/controlling emissions to the air. 3. Water: a(1)-a(6) - Concur with checklist. b(1)-b(2) - Concur with checklist. JR Page 3 of 5 07/23/2012 H:\SEPA\SeaTac Motors Soil Remediation\SR E11-012 PL11-058.doc c(1)-c(2) - Best Management Practices must be followed to ensure that no construction debris enters the storm drainage system. The project shall meet all King County Surface Water Design Manual drainage requirements. All impacts associated with drainage will be mitigated as part of the construction permit. d - The project shall meet all King County Surface Water Design Manual drainage requirements. All impacts associated with drainage will be mitigated as part of the construction permit. 4. Plants: a- Shrubs are located in the northern portion of the project site. b-d - Concur with checklist. 5. Animals: a-c- This site is within the Pacific Flyway, a migratory route for birds. d - Concur with checklist. 6. Energy and Natural Resources: a-c - Concur with checklist. 7. Environmental Health: a — Concur with checklist. The applicant shall coordinate with the Tukwila Fire Department for any required permits or other requirements, and shall submit a final soils remediation report to the Tukwila Fire Department once it is completed. (1-2) - The applicant shall coordinate with the Tukwila Fire Department for any required permits or other requirements. b (1) - Concur with checklist. b(2)-b(3) - The project must meet City of Tukwila noise ordinance requirements. Compliance with applicable local, state and federal noise regulations will mitigate any potential adverse noise impacts associated with the project. 8. Land and Shoreline Use: a-e - Concur with checklist. f - The current Comprehensive Plan designation for the site is Neighborhood Commercial Center (NCC). g-1 - Concur with checklist. 9. Housing: a-c - Concur with checklist. 10. Aesthetics: a-c - Concur with checklist. 11. Light and Glare: a-d - Concur with checklist. JR Page 4 of 5 07/23/2012 H:\SEPA\SeaTac Motors Soil Remediation\SR E11-012 PL11-058.doc 12. Recreation: a-c - Concur with checklist. 13. Historic and Cultural Preservation: a-c - Concur with checklist. 14. Transportation: a-g - Concur with checklist. 15. Public Services: a-b - Concur with checklist. 16. Utilities: a-b - Concur with checklist. VI. COMMENTS: No comments were received during the Notice of Application period for this project. VII. CONCLUSION The proposal can be found to not have a probable significant adverse impact on the environment and pursuant to WAC 197-11-340 a Determination of Nonsignificance (DNS) is issued for this project. This DNS is based on impacts identified within the environmental checklist, attachments, technical reports, and the above Final Staff Evaluation for Environmental Checklist File No. Ell - 012, and is supported by plans, policies, and regulations formally adopted by the City of Tukwila for the exercise of substantive authority under SEPA to approve, condition, or deny proposed actions. Prepared by: Jaimie Reavis, Assistant Planner Date: July 26, 2012 JR Page 5 of 5 07/23/2012 H:\SEPA\SeaTac Motors Soil Remediation\SR E11-012 PL11-058.doc City of Tukwila Jiin Haggerton, Mayor Department of Community Development Jack Pace, Director February 1, 2012 Leobardo Chaidez 1018 Capitol Way S. Olympia WA 98501 RE: Seatac Motors (Formerly), BeuSartffLand Dev. Notice of Application, PL11-058, E11-012 Sepa Environmental review of wila Intl Blvd Dear Leobardo Chaidez: There is a fee due on your permit application in the amount of $247.00 to cover fees associated with mailing the attached public notice. The number of required notices sent for your application was 247 which included property owners and tenants within 500 feet of your project site as well as interested parties and agencies with jurisdiction. The cost is based on the land use fee schedule adopted by Resolution Number 1718 covering Public Notice mailings required for your application. This fee covers the attached notice only. Additional fees may be assessed for future mailings or other review tasks per the fee schedule. This amount needs to be paid before the city can continue processing your permit application. The payment may be paid by cash, check or credit card. The city will accept credit card payments by phone. If paying by check please send the check made out to: City of Tukwila 6300 Southcenter Blvd, Ste 100 Tukwila, WA 98188 If you have any • ' estions, please feel free to contact me at 206 431 3670. Teri :v 1 Admin : rative Support Technician MD Invoicing Public Mailings.doc Page 1 of 1 02/01/2012 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone 206-431-3670 • Fax: 206-431-3665 City of Tukwila Department of Community Development 6300 Southcenter Boulevard, Suite #100 Tukwila, Washington 98188 Phone: 206-431-3670 Fax: 206-431-3665 Web site: http://www.TukwilaWA.gov RECEIPT ParcelNo.: 1523049123 Permit Number: E11-012 Address: 14120 TUKWILA INTERNATIONAL BL TUKW Status: PENDING Suite No: Applied Date: 12/21/2011 Applicant: SEATAC MOTORS (FORMERLY) Issue Date: Receipt No.: R12-00607 Initials: TLS User ID: 1670 Payment Amount: $247.00 Payment Date: 02/13/2012 10:42 AM Balance: $0.00 Payee: ASSOCIATED ENVIRONMENTAL GROUP LLC TRANSACTION LIST: Type Method Descriptio Amount Payment Check 5855 247.00 Authorization No. ACCOUNT ITEM LIST: Description Account Code Current Pmts MAPS/PUBLIC/MAILING 000.341.500 247.00 Total: $247.00 doc: Receiot-06 Printed: 02-13-2012 Ohl of J uIwiea Department Of Community Development AFFIDAVIT OF DISTRIBUTION I, Teri Svedahi , HEREBY DECLARE THAT: x Notice of Application Notice of Decision Notice of Public Hearing Notice of Public Meeting Determination of Non- Significance Mitigated Determination of Non - Significance Determination of Significance & Scoping Notice Short Subdivision Agenda Notice of Application for Shoreline Mgmt Permit Shoreline Mgmt Permit Board of Appeals Agenda Packet Board of Adjustment Agenda Packet Official Notice Notice of Action Other: Was mailed to each of the addresses listed/attached: DOE/SEPA Electronically, KC Assessor & Puget Sound Clean Air postcard via USPS on this 3 day of _February , 2012 Project Name: SEATAC MOTORS (FORMERLY) -BEN CAROL LAND DEV Project Number: PL11-058 Associated File Number (s): E11-012 Mailing requested by: Jaimie Reavis Mailer's signature: 71 l7,7 ./(// 0., /% W:\USERS\TERI\TEMPLATES-FORMS\AFFIDAVIT OF DISTRIBUTION.DOC AGENCY LABELS ( ) Office of Archaeology ( ) Transportation Department (WSDOT NW) ( ) Dept of Natural Resources ( ) Office of the Governor ( ) WA State Community Development ( ) WA Fisheries & Wildlife ( ) US Corps of Engineers ( ) Federal HWY Admin ( ) Federal Transit Admin, Region 10 ( ) Dept of Fish & Wildlife Section 1 FEDERAL AGENCIES ( ) US Environmental Protection Agency (E.P.A.) ( )US Dept of HUD ( ) National Marine Fisheries Service Section 2 WASHINGTON STATE AGENCIES ( ) Dept of Social & Health Services ( ) Dept of Ecology NW Regional Office, Shoreland Division 7X) Dept of Ecology, SEPA - �G ( ) Office of Attorney General 11 ' Cif ( ) Office of Hearing Examiner ( ) KC Boundary Review Board ( ) Fire District # 11 ( ) Fire District # 2 ( ) KC Wastewater Treatment Div ( ) KC Dept of Parks & Recreation (}4KC Assessor's Office Section 3 KING COUNTY AGENCIES ( ) Health Department ( ) Port of Seattle ( ) KC Dev & Enviro Services-SEPA Info Center ( ) KC Metro Transit Div-SEPA Official, Environmental Planning ( ) KC Dept of Natural Resources ( ) KC Dept of Natural Resources, Andy Levesque ( ) Tukwila School District ( ) Tukwila Library ( ) Renton Library ( ) Kent Library ( ) Seattle Library Section 4 SCHOOLS/LIBRARIES ( ) Foster Library ( ) KC Public Library System ( ) Highline School District ( ) Seattle School District ( ) Renton School District ( ) Westfield Mall Library ( ) QWEST Communications ( ) Seattle City Light ( ) Puget Sound Energy ( ) Highline Water District ( ) Seattle Planning &Dev/Water Dept ( ) Comcast Section 5 UTILITIES ( ) BP Olympic Pipeline ( ) Val-Vue Sewer District ( ) Water District # 20 ( ) Water District # 125 ( ) City of Renton Public Works ( ) Bryn Mawr-Lakeridge Sewer/Water Dist ( ) Seattle Public Utilities ( ) Allied Waste Services ( ) Tukwila City Departments ( ) Public Works ( ) Fire ( ) Police ( ) Finance ( ) Planning ( ) Building ( ) Parks & Rec ( ) Mayor ( ) City Clerk Section 6 CITY AGENCIES ( ) Kent Planning Dept ( ) Renton Planning Dept ( ) City of SeaTac ( ) City of Burien ( ) City of Seattle ( ) Strategic Planning *Notice of all Seattle Related Projects ( ) Puget Sound Regional Council ( ) SW KC Chamber of Commerce ( ) Muckleshoot Indian Tribe * ( ) Cultural Resources ( ) Fisheries Program ( ) Wildlife Program ( ) Duwamish Indian Tribe * Section 7 OER LOCAL AGENCIES 14 Puget Sound Clean Air Agency ( ) Sound Transit/SEPA ( ) Duwamish River Clean Up Coalition * ( ) Washington Environmental Council ( ) People for Puget Sound * ( ) Futurewise * send notice of all applications on Green/Duwamish River ( ) Seattle Times ( ) South County Journal Section 8 MEDIA ( ) Highline Times ( ) City of Tukwila Website P:Admin\Admin Forms\Agency Checklist Public Notice Mailings For Permits SEPA MAILINGS Mail to: (comment period starts on date of mailing) Dept. of Ecology Environmental Review Section *Applicant *Other agencies as necessary (checked off on attached list) *Any parties of record * send only the staff report, site plan and the SEPA Determination KC Transit Division — SEPA Official would like to receive information about all projects that might affect transit demand Tribes — For any application on the Green/Duwamish River, send the checklist and a full set of plans with the Notice Of Application Send These Documents to DOE: SEPA Determination (3-part from Sierra) Findings (staff report, usu. with MDNS) SEPA Checklist (filled out by applicant) Drawings/Plans of project (site plan, elevations, etc. from PMT's) Affidavit of Distribution (notice was mailed or sent to newspaper) SHORELINE MAILINGS: Notice of Application for a Substantial Development Permit must be mailed to owners and to property owners within 500 feet of subject property, comments are due 30 days after the notice of application is mailed/posted. The Notice of Application for Shoreline Substantial Development Permit must include a statement that any person desiring to submit written comments on the application or desiring to receive notification of the final decision on the application may do so within 30 days of the Notice of Application. If a hearing will be held on the application, the hearing notice must include the information that written comments may be submitted, or oral presentation made at the hearing. Notice is sent to Ecology's NW Regional Office Shorelands & Environmental Assistance Program. Shoreline Permit Notice of Decision: Mail to: (within 8 days of decision; 21-day appeal period begins date received by DOE) Department of Ecology Shorelands Section, NW Regional Office State Attorney General *Applicant *Indian Tribes *Other agencies as necessary (checked off on attached list). *Any parties of record * send only the staff report, site plan and the SEPA Determination Send These Documents to DOE and Attorney General: Permit Data Sheet Shoreline Substantial Development Permit (3-part from Sierra) Findings (staff report or memo) Shoreline Permit Application Form (filled out by applicant) Drawings/Plans of project (site plan, elevations, etc. from PMT's) - Site plan, with mean high water mark & improvements — Cross -sections of site with structures & shoreline - Grading Plan — Vicinity map SEPA determination (3-part from Sierra) Findings (staff report or memo) SEPA Checklist (filled out by applicant) Any background studies related to impacts on shoreline Notice of Application Affidavit of Distribution (notice was mailed) P:Admin\Admin Forms\Agency Checklist City of Tukwila Notice of Application ,►vironmental Review-14201 Tukwila International Blvd (UT&T Auto Services) Location: 14201 Tukwila Intl. Blvd. (parcel #152304- 9123) File #'s: El 1-012 (SEPA), PL11-058 (Project File), PW11-095 (Public Works Permit) Applicant: Leobardo Chaidez, AEG, LLC Property Owners: Ben Carol Land Dev Inc Project Planner: Jaimie Reavis, 206-431-3659 Project Description: This project is an environmental review of excavation of approximately 500 cubic yards of petroleum -contaminated soil and replacement of the of the excavated soil with approximately 500 cubic yards of new fill . Contaminated soil will be disposed of off -site, and the area will be paved after excavation and fill are completed. Work has already been com- pleted prior to obtaining permits. This review is being conducted to comply with code requirements. Comments and Appeals: Tukwila has reviewed the project for probable adverse environmental impacts and expects to issue a determination of non -significance (DNS) under the optional DNS process in WAC 197-11-355. There will be a single integrated comment period for the environmental review so this may be your only oppor- tunity to comment on the environmental impacts of the project. If timely comments do not identify probable significant adverse impacts that were not considered by the anticipated determination the DNS will be issued without a second comment period. Your written comments on the project are requested and can be delivered to DCD, 6300 Southcenter Blvd., Suite 100. Comments must be received by 5:OOpm on Feb. 15, 2012. You may request a copy of any decision, information on hearings, and your appeal rights by calling 206-431-3659. You are receiving this notice as a property owner or tenant within 500ft of this project, or as an agency with jurisdiction and/or interest in the project. City of Tukwila Jim Haggerton, Mayor Department of Community Development Jack Pace, Director NOTICE OF COMPLETE APPLICATION January 24, 2012 Mr. Leobardo Chaidez 1018 Capitol Way S. Olympia, WA 98501 Subject: 14120 Tukwila International Blvd — SeaTac Motors SEPA Environmental Review Application, (file no. E11-012) Dear Mr. Chaidez: Your application for SEPA Environmental Review for excavation and backfill as part of a soil remediation project at 14120 Tukwila International Blvd was considered complete on January 18, 2012 for the purposes of meeting state mandated time requirements. The determination of complete application does not preclude the ability of the City to require that you submit additional plans or information, if in our estimation such information is necessary to ensure the project meets the substantive requirements of the City or to complete the review process. This notice of complete application applies only to the permits identified above. It is your responsibility to apply for and obtain all necessary permits issued by other agencies. A public notice board for this project shall be manufactured and installed on site within 8 days (by February 1, 2012). The City of Tukwila will coordinate the public notice mailing with installation of the public notice board. Once the public notice board is installed, the public comment period for this project will be 14 days. The City will be processing the SEPA permit under the Optional DNS process. Please contact me with any questions at (206) 431-3659. Sincerely, Jaimie Reavis Assistant Planner 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • Phone 206-431-3670 • Fax 206-431-3665 TO: City of Tukwila Department of Community Development File Number E11-012 (SEPA) PL11-058 (Project Number for Time Tracking) LAND USE PERMIT ROUTING FORM dill Building Planning ublic Works QFire Dept. 10 Jr� Police Dept. Parks/Rec Project: UT&T Soil Remediation Project — excavation and fill, repave work area with asphalt Address: 14120 Tukwila International Blvd (parcel #152304-9123) Date transmitted: 02/06/2012 Response requested by: 02/21/2012 Staff coordinator: Jaimie Reavis Date response received: REVIEWERS: Please specify how the attached plans conflict with your ADOPTED development regulations, including citations. Be specific in describing the types of changes you want made to the plans. When referencing codes, please identify the actual requirement and plan change needed. The Planning Division review does not supplant each department's ability to administer its own regulations and permits. However, project consistency at the Planning review stage is important to minimize significant later design changes. More than minimal design changes require further Planning Commission review, even if alteration is required to satisfy a City requirement. This further review is typically a minimum 60-day process. Requirements based on SEPA (e.g., not required by an adopted development regulation) MUST identify the impact being mitigated, the policy basis for requiring mitigation, and the method used to calculate the mitigation required. Calculations of project impacts and the mitigation required (e.g., water capacity, road level of service analyses, or turning analyses) may be required of the applicant. COMMENTS (Attach additional comment sheets and/or support materials as needed.) See also Public Works permit PW11-095. Work was already completed prior to obtaining permits. Plan check date: n/ Comments /,5( Update date: 9/ /prepared 0/2 by: !'00,(� — TO: 0 City of Tukwila Department of Community Development File Number E11-012 (SEPA) PL11-058 (Project Number for Time Tracking) LAND USE PERMIT ROUTING FORM Building Q Planning QPublic Works Dire Dept. Police Dept. Parks/Rec Project: UT&T Soil Remediation Project — excavation and fill, repave work area with asphalt Address: 14120 Tukwila International Blvd (parcel #152304-9123) Date transmitted: 02/06/2012 Response requested by: 02/21/2012 Staff coordinator: Jaimie Reavis Date response received: REVIEWERS: Please specify how the attached plans conflict with your ADOPTED development regulations, including citations. Be specific in describing the types of changes you want made to the plans. When referencing codes, please identify the actual requirement and plan change needed. The Planning Division review does not supplant each department's ability to administer its own regulations and permits. However, project consistency at the Planning review stage is important to minimize significant later design changes. More than minimal design changes require further Planning Commission review, even if alteration is required to satisfy a City requirement. This further review is typically a minimum 60-day process. Requirements based on SEPA (e.g., not required by an adopted development regulation) MUST identify the impact being mitigated, the policy basis for requiring mitigation, and the method used to calculate the mitigation required. Calculations of project impacts and the mitigation required (e.g., water capacity, road level of service analyses, or turning analyses) may be required of the applicant. COMMENTS (Attach additional comment sheets and/or support materials as needed.) See also Public Works permit PW11-095. Work was already completed prior to obtaining permits. 3)Qc 0.)ak tfs ‹,tRo-k, ock-,k Plan check ate: Comments Update date: Z1k5\\Z prepared by: !� '�� 1 1�251 City of Tukwila Department of Community Development File Number E11-012 (SEPA) PL11-058 (Project Number for Time Tracking) LAND USE PERMIT ROUTING FORM TO: P Building CJ Planning QPublic Works QFire Dept. Police Dept. LI Parks/Rec Project: UT&T Soil Remediation Project — excavation and fill, repave work area with asphalt Address: 14120 Tukwila International Blvd (parcel #152304-9123) Date transmitted: 02/06/2012 Response requested by: 02/21/2012 Staff coordinator: Jaimie Reavis Date response received: REVIEWERS: Please specify how the attached plans conflict with your ADOPTED development regulations, including citations. Be specific in describing the types of changes you want made to the plans. When referencing codes, please identify the actual requirement and plan change needed. The Planning Division review does not supplant each department's ability to administer its own regulations and permits. However, project consistency at the Planning review stage is important to minimize significant later design changes. More than minimal design changes require further Planning Commission review, even if alteration is required to satisfy a City requirement. This further review is typically a minimum 60-day process. Requirements based on SEPA (e.g., not required by an adopted development regulation) MUST identify the impact being mitigated, the policy basis for requiring mitigation, and the method used to calculate the mitigation required. Calculations of project impacts and the mitigation required (e.g., water capacity, road level of service analyses, or turning analyses) may be required of the applicant. COMMENTS (Attach additional comment sheets and/or support materials as needed.) See also Public Works permit PW11-095. Work was already completed prior to obtaining permits. s Plan check date: Comments Update date: 2-7—/7i by: prepared City of Tukwila Department of Community Development File Number E11-012 (SEPA) PL11-058 (Project Number for Time Tracking) LAND USE PERMIT ROUTING FORM TO: Q Building 0Planning ElPublic Works QFire Dept. Police Dept. Parks/Rec Project: UT&T Soil Remediation Project — excavation and fill, repave work area with asphalt Address: 14120 Tukwila International Blvd (parcel #152304-9123) Date transmitted: 02/06/2012 Response requested by: 02/21/2012 Staff coordinator: Jaimie Reavis Date response received: REVIEWERS: Please specify how the attached plans conflict with your ADOPTED development regulations, including citations. Be specific in describing the types of changes you want made to the plans. When referencing codes, please identify the actual requirement and plan change needed. The Planning Division review does not supplant each department's ability to administer its own regulations and permits. However, project consistency at the Planning review stage is important to minimize significant later design changes. More than minimal design changes require further Planning Commission review, even if alteration is required to satisfy a City requirement. This further review is typically a minimum 60-day process. Requirements based on SEPA (e.g., not required by an adopted development regulation) MUST identify the impact being mitigated, the policy basis for requiring mitigation, and the method used to calculate the mitigation required. Calculations of project impacts and the mitigation required (e.g., water capacity, road level of service analyses, or turning analyses) may be required of the applicant. COMMENTS (Attach additional comment sheets and/or support materials as needed.) See also Public Works permit PW11-095. Work was already completed prior to obtaining permits. Plan check date: Comments Update date: prepared by: Department of Community Develop RECENk0 CITY OF TUKWILA-..c,21 20114 SEPA 6300 Southcenter Boulevard, Tukwila, WA »: r ;'"'TM NVIRONMENTAL Telephone: (206) 431-3670 FAX: (206) 4 - 665 REVIEW E-mail: planning@TukwilaWA.gov APPLICATION FOR STAFF USE ONLY Permits Plus TYPE: P-SEPA Planner: \Teo Uwe e �.ewvl s Application Complete Date: IIIS (Zp 1 y Application Incomplete Date: u-01*. Project File Number: %3 /1-- File Number: Other File Numbers: NAME OF PROJECT/DEVELOPMENT: FORMER SEATAC MOTORS fh1t cK LOCATION OF PROJECT/DEVELOPMENT: Give street address or, if vacant, indicate lot(s), block and subdivision, access street, and nearest intersection. 14120 Tukwila International Blvd. LIST ALL TAX LOT NUMBERS (this information may be found on your tax statement). Parcel No. 152304-9123 DEVELOPMENT COORDINATOR : The individual who: • has decision making authority on behalf of the owner/applicant in meetings with City staff, • has full responsibility for identifying and satisfying all relevant and sometimes overlapping development standards, and • is the primary contact with the City to whom all notices and reports will be sent. Name: Leobardo Chaidez Address: 1018 Capitol Way S. Olympia, WA 98501 Phone: (360) 352-9835 FAX: (360) 352-8164 E-mail: mchun@aegwa.com Signature: '� �-®Date: 12/20/2011 H:\Land Use Applications In PDF\SEPA Environmental Review Application-Jan2011.Doc COMPLETE APPLICATION CHECKLIST The materials listed below must be submitted with your application unless specifically waived in writing by the Public Works Department and the Department of Community Development. Please contact each Department if you feel that certain items are not applicable to your project and should be waived. Application review will not begin until it is determined to be complete. ADDITIONAL MATERIALS MAY BE REQUIRED. The initial application materials allow project review to begin and vest the applicant's rights. However, the City may require additional information as needed to establish consistency with development standards. City staff are available to answer questions about application materials at 206-431-3670 (Department of Community Development) and 206-433-0179 (Department of Public Works). Check items submitted with application Information Required. May be waived in unusual cases, upon approval of both Public Works and Planning APPLICATION/MATERIALS: ✓/ 1. Application Checklist (1 copy) indicating items submitted with application. �/ j 2. Completed ESA Screening Checklist, SEPA Environmental Checklist and drawings (5 cop' s). V/ 3. One set of all plans reduced to 8 1/2" x 11" or 11" x 17". ( AAA L 1)/1.-%L X It V/ 4. Application Fee: See Land Use Fee Schedule. 5. Underlying permit application that triggers SEPA review. --p PUBLIC NOTICE MATERIALS: 6. Payment of a $365 notice board fee to FastSigns Tukwila OR provide a 4' x 4' public notice board on site within 14 days of the Department determining that a complete application has been received (see Public Notice Sign Specifications Handout). 7. Pay the fee as established by the Land Use Fee Schedule for generating mailing labels; OR provide an excel spreadsheet of mailing labels for all property owners and tenants (residents and businesses) within 500 feet of the subject property. Each unit in multiple family buildings e.g. apartments, condos, trailer parks --must be included. Once your project is assigned to a planner, you will be required to provide an electronic copy of the mailing label spreadsheet in the following format: Name, Street Address, City St Zip, with each of these fields as an individual column: Name Street Address City, St, Zip Mr. Smith 1234 Park Ave S Tukwila WA 98188 PLEASE NOTE: Regardless of whether you pay the City to generate the mailing labels or you provide them, there is an additional fee for postage and material as listed under Public Notice Mailing Fee on the Land Use Fee Schedule. Payment of this fee is due prior to issuance of the decision and you will receive a separate bill for this fee. 8. If providing own labels, include King County Assessor's map(s) which shows the location of each property within 500 ft. of the subject lot. H:\L.and Use Applications In PDF\SEPA Environmental Review Application-Jan2011.Doc Check items submitted with application Information Required. May be waived in unusual cases, upon approval of both Public Works and Planning PROJECjT DESCRIPTION AND ANALYSIS: 9. Vicinity Map with site location. 10. Provide four (4) copies of any sensitive area studies such as wetland or geotechnical reports if needed per Tukwila's Sensitive Areas Ordinance (TMC 18.45). See the Geotechnical Report Guidelines and Sensitive Area Special Study Guidelines for additional information. 11. Any drawings needed to describe the proposal other than those submitted with the underlying permit. Maximum size 24" x 36". H:Uand Use Applications In PDF\SEPA Environmental Review Application-Jan2011.Doc City of Tukwila Department of Community Development 6300 Southcenter Boulevard, Suite #100 Tukwila, Washington 98188 Phone: 206-431-3670 Fax: 206-431-3665 Web site: http://www.TukwilaWA.Qov RECEIPT Parcel No.: 1523049123 Permit Number: E11-012 Address: 14120 TUKWILA INTERNATIONAL BL TUKW Status: PENDING Suite No: Applied Date: 12/21/2011 Applicant: SEATAC MOTORS (FORMERLY) Issue Date: Receipt No.: R11-02766 Payment Amount: $1,890.00 Initials: JEM Payment Date: 12/21/2011 12:17 PM User ID: 1165 Balance: $0.00 Payee: ASSOCIATED ENVIRONMENTAL GROUP, LLC TRANSACTION LIST: Type Method Descriptio Amount Payment Check 5792 1,890.00 Authorization No. ACCOUNT ITEM LIST: Description Account Code Current Pmts MAPS/PUBLIC/MAILING SEPA 000.341.500 000.345.831 Total: $1,890.00 400.00 1,490.00 doe: Receipt-06 Printed: 12-21-2011 SEPA Checklist STATE ENVIRONMENTAL POLICY ACT CHECKLIST Please respond to all questions. Use separate sheets as necessary. Applicant Responses: A. BACKGROUND 1. Name of proposed project, if applicable: Former SeaTac Motor 2. Name of Applicant: Associated Environmental Group LLC 3. Date checklist prepared: 4. Agency requesting checklist: City of Tukwila 5. Proposed timing or schedule (including phasing, if applicable): 9/27/11 6. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. Installation of groundwater monitoring wells 7. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. Quarterly groundwater monitoring reports 8. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. None Agency Comments H:\Land Use Applications in PDFISEPA Environmental Review Application-]an2011.doc Page 1 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments 9. List any government approvals or permits that will be needed for your proposal. None 10. 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. Removal of potentially petroleum contaminated soil from the site via excavation and subsequent disposal as non -hazardous material at a recycling facility 11. 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, the tax lot number, and section, township, and range. 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. 14120 Tukwila International Blvd. Tukwila, WA King Co. Parcel No. 152304-9123 SW Quadrangle, T 23 N - R 4 E - Section 15 12. Does the proposal lie within an area designated on the City's Comprehensive Land Use Policy Plan Map as environmentally sensitive? No H:U.and Use Applications in PDF\SEPA Environmental Review Application-1an2011.doc Page 2 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: B. ENVIRONMENTAL ELEMENTS 1. Earth a. General description of the site (circle one): Flat, rolling, hilly, steep slopes, mountainous, other: Flat b. What is the steepest slope on the site (approximate percent slope)? No slope 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 prime farmland. Sand, silty sand, sandy clay, clay d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. No e. Describe the purpose, type, and approximate quantities of any filling or grading proposed. Indicate source of fill. approximately 1,000 tons of 1-1/4" recycled concrete from Joe Anderson's site in Seattle to backfill the excavation. surface will be completed to grade with asphalt Agency Comments H:\ and Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 3 Please respond to ati questions. Use separate sheets as necessary. Applicant Responses: f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. No g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? 10% h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Sand bags around the perimeter of the excavation 2. Air a. What types of emissions to the air would result from the proposal (for example, dust, automobile odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. None b. Are there any off -site sources of emissions or odor that may affect your proposal? If so, generally describe. None H:Vand Use Applications in PDFGSEPA Environmental Review Application-Jan2011.doc SEPA Checklist Agency Comments Page 4 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments c. Proposed measures to reduce or control emissions or other impacts to air, if any: None 3. Water a. Surface: 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. No 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. None 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. None H:\land Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 5 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: 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. No 6. Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. No b. Ground: 1. Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quantities, if known. No HALand Usc Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Agency Comments Page 6 Please respond to all questions. Use separate sheets as necessary. Applicant Responses: 2. Describe waste materials 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: None c. Water Runoff (including storm water): 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? Will this water flow into other waters? If so, describe. None 2. Could waste materials enter ground or surface waters? If so, generally describe. No d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: N/A SEPA Checklist Agency Comments H:\Land Use Applications in PDF\SEPA Environmental Review Application-Jan201 l.doc Page 7 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: 4. Plants a. Check or circle types of vegetation found on the site: Deciduous tree: alder, maple, aspen, other Evergreen tree: fir, cedar, pine, other Shrubs Grass Pasture Crop or grain Wet soil plants: cattail, buttercup, bulrush, 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? none c. List threatened or endangered species known to be on or near the site. none d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: N/A H:\ and Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Agency Comments Page 8 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: 5. Animals a. Circle any birds or animals which have been observed on or near the site or are known to be on or near the site: Birds: Hawk, heron, eagle, songbirds, other: Mammals: Deer, bear, elk, beaver, other: Fish: Bass, salmon, trout, herring, shellfish, other: Other: b. List any threatened or endangered species known to be on or near the site. N/A c. Is the site part of a migration route? If so, explain. no d. Proposed measures to preserve or enhance wildlife, if any: N/A 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. N/A Agency Comments H:\Land Use Applications in PDFISEPA Environmental Review Application-Jan2011.doc Page 9 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. no c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: N/A 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. potential for hydrocarbon type odor emanating from the excavation, if hydrocarbon affected soil is encountered 1. Describe special emergency services that might be required. none 2. Proposed measures to reduce or control environmental health hazards, if any: Use of level D PPE / fire extinguisher H:\Land Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 10 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments b. Noise 1. What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? none 2. What types and levels of noise would be created by or associated with the project on a short-term or long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. short-term noise associated with the use of backhoe equipment 3. Proposed measures to reduce or control noise impacts, if any: none 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? The site is used as a vehicle repair facility with asphalt parking area. Surrounding properties consist of apartment buildings and commercial retail stores / businesses b. Has the site been used for agriculture? If so, describe. No H:\Iand Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 11 Please respond to questions. Use separate sheets as necessa., . Applicant Responses: c. Describe any structures on the site. Service station (car repair) and a mobile office unit d. Will any structures be demolished? If so, what? none e. What is the current zoning classification of the site? NCC f. What is the current comprehensive plan designation of the site? remediate the site soil to meet Washington State Dept. of Ecology cleanup levels g. If applicable, what is the current shoreline master program designation of the site? N/A H:\Land Use Applications in PDP\SEPA Environmental Review Application-Jan2011.doc SEPA Checklist Agency Comments Page 12 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. No i. Approximately how many people would reside or work in the completed project? 4 j. Approximately how many people would the completed project displace? noone k. Proposed measures to avoid or reduce displacement impacts, if any: N/A 1. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: N/A H:\Land Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 13 Please respond to ail questions. Use separate sheets as necessary. Applicant Responses: 9. Housing a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing? N/A b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. N/A c. Proposed measures to reduce or control housing impacts, if any: N/A 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? N/A b. What views in the immediate vicinity would be altered or obstructed? none H:U.and Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc SEPA Checklist Agency Comments Page 14 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments c. Proposed measures to reduce or control aesthetic impacts, if any: N/A 11. Light and Glare a. What type of light or glare will the proposal produce? What time of day would it mainly occur? N/A b. Could light or glare from the finished project be a safety hazard or interfere with views? N/A c. What existing off -site sources of light or glare may affect your proposal? N/A d. Proposed measures to reduce or control light and glare impacts, if any: N/A H:\land Use Applications in PDFISEPA Environmental Review Application-Jan2011.doc Page 15 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: 12. Recreation a. What designed and informal recreational opportunities are in the immediate vicinity? none b. Would the proposed project displace any existing recreational uses? If so, describe. no c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: N/A 13. Historic and Cultural Preservation a. Are there any places or objects listed on, or proposed for, National, State, or Local preservation registers known to be on or next to the site? If so, generally describe. none H:\L.and Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Agency Comments Page 16 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. none c. Proposed measures to reduce or control impacts, if any: N/A 14. Transportation a. Identify public streets and highways serving the site, and describe proposed access to the existing street system. Show on site plans, if any. Tukwila Intemational Blvd. access shown on site map, included b. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? bus stop approximately 200 yards south of the site c. How many parking spaces would the completed project have? How many would the project eliminate? N/A H:Uand Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 17 Please respond to ail questions. Use separate sheets as necessary. Applicant Responses: d. Will the proposal require any new roads or streets, or improvements to existing roads or streets, not including driveways? If so, generally describe (indicate whether public or private). no e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. no f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. 25 p/day g. Proposed measures to reduce or control transportation impacts, if any: N/A 15. Public Services a. Would the project result in an increased need for public services (for example: fire protection, police protection, health care, schools, other)? If so, generally describe. no HA -and Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc SEPA Checklist Agency Comments Page 18 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments b. Proposed measures to reduce or control direct impacts on public services, if any. N/A 16. Utilities a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system other: all 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. N/A H:\Iand Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 19 SEPA Checklist (NON -PROJECT PROPOSALS (E.G., SUBURBAN PLANS AND ZONING CODE TEXT CHANGES) MUST COMPLETE THE FOLLOWING PAGES). C. SUPPLEMENTAL SHEET FOR NON -PROJECT PROPOSALS (do not use this sheet for project actions) Because these questions are very general, it may be helpful to read them in conjunction with the list of elements of the environment. When answering these questions, be aware of the extent the proposal, or the types of activities likely to result from the proposal, would affect the item at a greater intensity or at a faster rate than if the proposal were not implemented. Respond briefly and in general terms. Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments 1. How would the proposals be likely to increase discharge to water; emissions to air; production, storage, or release of toxic or hazardous substances; or production of noise? Possible hydrocarbon type odor resulting from contaminated soil in the excavation, Increase in noise due to the use of a backhoe Proposed measures to avoid or reduce such increases are: hydrocarbon type odor, if present, will only be perceptible in the immediate area of excavation. Noise due to backhoe will be minimal. 2. How would the proposal be likely to affect plants, animals, fish, or marine life? not affected Proposed measures to protect or conserve plants, animals, fish, or marine life are: N/A H:\Iand Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 20 SEPA Checklist Please respond to all questions. Use separate sheets as necessary. Applicant Responses: Agency Comments 3. How would the proposal be likely to deplete energy or natural resources? N/A Proposed measures to protect or conserve energy and natural resources are: N/A 4. How would the proposal be likely to use or affect environmentally sensitive areas or areas designated (or eligible or under study) for governmental protection; such as parks, wilderness, wild and scenic rivers, threatened or endangered species habitats, historic or cultural sites, wetlands, floodplains, or prime farmlands? Will not affect Proposed measures to protect such resources or to avoid or reduce impacts are: N/A 5. How would the proposal be likely to affect land and shoreline use, including whether it would allow or encourage land or shoreline uses incompatible with existing plans? N/A H:\ and Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 21 SEPA Checklist Please respond to-.11 questions. Use separate sheets as necessary. Applicant Responses: Agency Comments Proposed measures to avoid or reduce shoreline and land use impacts are: N/A 6. How would the proposal be likely to increase demands on transportation or public service and utilities? N/A Proposed measures to reduce or respond to such demand(s) are: N/A 7. Identify, if possible, whether the proposal may conflict with Local, State, or Federal laws or requirements for the protection of the environment. N/A Will not affect D. SIGNATURE Under the penalty of perjury the above answers under ESA Screening Checklist and State Environmental Policy Act Checklist 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: Date Submitted: H:V.and Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 22 4, k City xkwila ESA Screening Checklist Date: City of Tukwila Endangered Species Act Screening Checklist Applicant Name: Street Address: City, State, Zip: Telephone: Associated Environmental Group LLC 1018 Capitol Way S. Suite 201 Olympia, WA 98501 (360) 352-9835 DIRECTIONS: This Screening Checklist has been designed to evaluate the potential for your project to result in potential "take" of Chinook salmon, Coho salmon, or Cutthroat trout as defined by Section 9 of the Endangered Species Act. The checklist includes a series of "Yes" or "No" questions about your project, organized into four parts. Starting with Part A on Page 2, read each question carefully, mark the appropriate "Yes" or "No," and proceed to the next question as directed by the checklist. To answer these questions, you may need to refer to site plans, grading and drainage plans, critical areas studies, or other documents you have prepared for your project. The City will evaluate your responses to determine if "take" is indicated. RECEIVED i'1 mil H:Vand Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 1 City of Tukwila ESA Screening Checklist Part A: Please review and answer each question carefully. Consider all phases of your project including, but not limited to, construction, normal operation, potential emergency operation, and ongoing and scheduled maintenance. Continue to the next question as directed for each No or Yes answer. 1-0 Will the project require any form of grading? Grading is defined as any excavating, filling, clearing, or creation of impervious surface, or any combination thereof, which alters the existing ground surface of the earth (TMC 18.06.370). Please mark the appropriate response. NO - Continue to Question 2-0 YES - Continue to Question 1-1 (Page 3) 2-0 Will the project require any form of clearing? Clearing means the removal or causing to be removed, through either direct or indirect actions, any vegetation from a site (18.06.145). Please mark the appropriate response. NO - Continue to Question 3-0 YES - Continue to Question 2-1 (Page 4) 3-0 Will the project require work, during any time of the project, below the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers or in wetlands? Ordinary high water mark is the mark that is found by examining the bed and banks of a stream and ascertaining where the presence and action of waters are so common and usual as to distinctly mark the soil from that of the abutting upland, in respect to vegetation (see TMC Chapter 18.06, Page 18-15). Please mark the appropriate response. NO - Continue to Question 4-0 YES - Continue to Question 3-1 (Page 5) 4-0 Will the project result in the processing or handling, storage, or treatment of hazardous substances? This does not include the proper use of fuel stored in a vehicle's fuel tank. Hazardous substances are any liquid, solid, gas, or sludge, including any material, substance, product, commodity, or waste, regardless of quantity, that exhibits the characteristics or criteria of hazardous waste as defined by Washington Administrative Code 173-303 (TMC 18.06.385). This includes fuel or other chemicals stored on -site during construction. Please mark the appropriate response. NO - Continue to Question 5-0 YES - Continue to Question 5-0 5-0 Will the project result in the withdrawal, injection, or interception of groundwater? Examples of projects that may affect groundwater include, but are not limited to: construction of a new well, change in water withdrawals from an existing well, projects involving prolonged construction dewatering, projects installing French drains or interceptor trenches, and sewer lines. For the purpose of this analysis, projects that require a geotechnical report pursuant to the requirements of TMC 18.45.060 or would require a geotechnical report if not exempt should answer Yes. Please mark the appropriate response. 1 .NO - Continue to Question 6-0 YES - Continue to Question 6-0 6-0 Will the project involve landscaping or re -occurring outdoor maintenance that includes the regular use of ..� .:fertilizers, pesticides, or herbicides? This does not include the one-time use of transplant fertilizers. Landscaping means natural vegetation such as trees, shrubs, groundcover, and other landscape materials arranged in a manner to produce an aesthetic effect appropriate for the use of the land (TMC 18.06.490). For the purpose of this analysis, this includes the establishment of new lawn or grass. Please mark the appropriate response. ✓ NO — Checklist Complete YES — Checklist Complete H:U.and Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 2 City r ikwila ESA Screening Checklist Part B: Please answer each question below for projects that include grading. Review each question carefully, considering all phases of your project including, but not limited to construction, normal operation, potential emergency operation, and ongoing and scheduled maintenance. Continue to the next question as directed for each No or Yes answer. 1-1 Will the project involve the modification of a watercourse bank or bank of the Green/Duwamish or Black Rivers between the ordinary high water mark and top of bank? This includes any projects that will require grading on any slope leading to a river or stream, but will not require work below the ordinary high water mark. Work below the ordinary high water mark is covered in Part C. Please mark the appropriate response. 1 NO - Continue to Question 1-2 YES - Continue to Question 1-2 1-2 Could the construction, operation, or maintenance of the project result in sediment transport off site or increased rates of erosion and/or sedimentation in watercourses, the Green/Duwamish rivers, or the Black River? Most projects that involve grading have the potential to result in increased erosion and/or sedimentation as a result of disturbances to the soil or earth. If your project involves grading and you have not prepared a Temporary Erosion and Sedimentation Control Plan specifically designed to retain 100 percent of the runoff (including during construction) from impervious surface or disturbed soils, answer Yes to this question. If your project is normally exempt under the Tukwila Municipal Code and would not require the preparation of a Temporary Erosion and Sedimentation Control Plan, BUT may still result in erosion or sediment transport off site or beyond the work area, answer Yes to this question. Please mark the appropriate response. ✓ NO - Continue to Question 1-3 YES - Continue to Question 1-3 1-3 Will the project result in the construction of new impervious surfaces? Impervious surfaces include those hard surfaces which prevent or restrict the entry of water into the soil in the manner that such water entered the soils under natural conditions prior to development; or a hard surface area that causes water to run off the surface in greater quantity or at an increased rate of flow from the flow presented under natural conditions prior to development. Such areas include, but are not limited to, rooftops, asphalt or concrete paving, compacted surfaces, or other surfaces that similarly affect the natural infiltration or runoff patterns existing prior to development (TMC 18.06.445). Please mark the appropriate response. NO - Continue to Question 2-0 (Page 2) 1 YES - Continue to Question 1-4 1-4 Will your project generate stormwater from the creation of impervious surfaces that will not be infiltrated on site? For the purpose of this analysis, infiltration includes the use of a stormwater treatment and management system intended to contain all stormwater on site by allowing it to seep into pervious surface or through other means to be introduced into the ground. If your project involves the construction of impervious surface and does not include the design of a stormwater management system specifically designed to infiltrate stormwater, answer Yes to this question. Please mark the appropriate response. ✓ NO - Continue to Question 2-0 (Page 2) YES - Continue to Question 2-0 (Page 2) H:\Land Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 3 City of Tukwila ESA Screening Checklist Part C: Please review each question below for projects that include clearing. Review each question carefully, considering all phases of your project including, but not limited to construction, normal operation, potential emergency operation, and ongoing and scheduled maintenance. Continue to the next question as directed for each No or Yes answer. 2-1 ✓ Will the project involve clearing within 200 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? Please mark the appropriate response. NO - Continue to Question 3-0 (Page 2) YES - Continue to Question 2-2 2-2 Will the project involve clearing of any trees within 200 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? A tree is defined by TMC 18.06.845 as any self-supporting woody plant, characterized by one main trunk, with a potential diameter -breast -height of 2 inches or more and potential minimum height of 10 feet. Please mark the appropriate response. ✓ NO - Continue to Question 2-3 YES - Continue to Question 2-3 2-3 Will the project involve clearing of any evergreen trees from within 200 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? For the purpose of this analysis evergreen means any tree that does not regularly lose all its leaves or needles in the fall. Please mark the appropriate response. ✓ NO - Continue to Question 2-4 YES - Continue to Question 2-4 2-4 Will the project involve clearing within 100 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? Please mark the appropriate response. ✓ NO - Continue to Question 3-0 (Page 2) YES - Continue to Question 2-5 2-5 Will the project involve clearing within 40 feet of the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? Please mark the appropriate response. ✓ NO - Continue to Question 3-0 (Page 2) YES - Continue to Question 3-0 (Page 2) H:\ and Use Applications in PDFISEPA Environmental Review Application-Jan2011.doc Page 4 r City c ,kwila ESA Screening Checklist Part D: Please review each question below for projects that include work below the ordinary high water mark of watercourses or the Duwamish/Green or Black Rivers or in wetlands. Review each question carefully, considering all phases of your project including, but not limited to, construction, normal operation, potential emergency operation, and ongoing and scheduled maintenance. Continue to the next question as directed for each No or Yes answer. 3-1 ✓ Will the project involve the direct alteration of the channel or bed of a watercourse, the Green/Duwamish rivers, or Black River? For the purpose of this analysis, channel means the area between the ordinary high water mark of both banks of a stream, and bed means the stream bottom substrates, typically within the normal wetted -width of a stream. This includes both temporary and permanent modifications. Please mark the appropriate response. NO - Continue to Question 3-2 YES - Continue to Question 3-2 3-2 Will the project involve any physical alteration to a watercourse or wetland connected to the Green/Duwamish River? For the purpose of this analysis, "connected to the river means" flowing into via a surface connection or culvert, or having other physical characteristics that allow for access by salmonids. This includes impacts to areas such as sloughs, side channels, remnant oxbows, ditches formed from channelized portions of natural watercourses or any area that may provide off channel rearing habitat for juvenile fish from the Duwamish River. This includes both temporary construction alterations and permanent modifications. Watercourses or wetlands draining to the Green/Duwamish River that have a hanging culvert, culvert with a flap gate, diversion, or any entirely man-made or artificial structure that precludes fish access should answer Yes to this question. Please mark the appropriate response. ✓ NO - Continue to Question 3-3 YES - Continue to Question 3-3 3-3 Will the project result in the construction of a new structure or hydraulic condition that could be a barrier to salmonid passage within the watercourse or the Green/Duwamish or Black Rivers? For the purpose of this analysis, a barrier means any artificial or human modified structure or hydraulic condition that inhibits the natural upstream or downstream movement of salmonids, including both juveniles and adults. Please mark the appropriate response. ✓ NO - Continue to Question 3-4 YES - Continue to Question 3-4 3-4 Will the project involve a temporary or permanent change in the cross -sectional area of a watercourse or the Green/Duwamish or Black Rivers? For the purpose of this analysis, the cross -sectional area is defined as a profile taken from the ordinary high water mark on the right bank to the ordinary high water mark on the left bank. Please mark the appropriate response. ✓ NO - Continue to Question 3-5 YES - Continue to Question 3-5 3-5 Will the project require the removal of debris from within the ordinary high water mark of a watercourse or the Green/Duwamish or Black Rivers? For the purpose of this analysis, debris includes, but is not limited to fallen trees, logs, shrubs, rocks, piles, rip -rap, submerged metal, and broken concrete or other building materials. Projects that would require debris removal from a watercourse or the Green/Duwamish or Black Rivers as part of a maintenance activity should answer Yes to this question. Please mark the appropriate response. ✓ NO - Continue to Question 3-6 YES - Continue to Question 3-6 H:\L.and Use Applications in PDF\SEPA Environmental Review Application-Jan2011.doc Page 5 Part D (continued) City of Tukwila ESA Screening Checklist 3-6 Will the project result in impacts to watercourses or wetlands that have a surface connection to another watercourse or the Green/Duwamish or Black Rivers but do not contain habitat conditions that support salmonid use? Such areas may include, but not be limited to hillside seeps and wetlands isolated from the watercourse or river that have a surface water connection to the watercourse or river but are not assessable, nor would be assessable to salmonids under natural conditions. Wetlands with a "functions and values" rating for baseflow/groundwater support of 9 and above (or moderate) as described in Cooke (1996) should be included. Please mark the appropriate response. ✓ NO - Continue to Question 3-7 YES - Continue to Question 3-7 3-7 Will the project include the construction of artificial waterways or wetlands connected to a watercourse containing salmonids? For the purpose of this analysis, the construction of artificial waterways or wetlands includes wetlands, channels, sloughs, or other habitat feature created to enhance wildlife use, particularly waterfowl use, or may be attractive to wildlife, particularly waterfowl. Please mark the appropriate response. NO - Continue to Question 3-8 YES - Continue to Question 3-8 3-8 Will the project include bank stabilization? For the purpose of this analysis, bank stabilization includes, but is not limited to, rip -rap, rock, log, soil, or vegetated revetments, concrete structures, or similar structures. Please mark the appropriate response. ✓ NO - Continue to Question 4-0 (Page 2) YES - Continue to Question 4-0 (Page 2) H:\Land Use Applications in PDF\SEPA Environmental Review Application-]an2011.doc Page 6 CITY OF TUKWILA Department of Community Development 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 FAX (206) 431-3665 E-mail: tukplan@ci.tukwila.wa.us RECEIVED ' +2120111 DEVELOPNMENT AFFIDAVIT OF OWNERSHIP AND HOLD HARMLESS PERMISSION TO ENTER PROPERTY STATE OF WASHINGTON COUNTY OF KING The undersigned being duly sworn and upon oath states as follows: 1, I am the current owner of the property which is the subject of this application. 2. All statements contained in the applications have been prepared by me or my agents and are true and correct to the best of my knowledge. 3. The application is being submitted with my knowledge and consent. 4. Owner grants the City, its employees, agents, engineers, contractors or othe representatives the right to enter upon Owner's real property, located at 14-1 2O TV 1>ry d, for the purpose of application review, for the limited time necessary to complete that purpose. 5. Owner agrees to hold the City harmless for any loss or damage to persons or property occurring on the private property during the City's entry upon the property, unless the loss or damage is the result of the sole negligence of the City. 6. Non -responsiveness to a City information request for ninety (90) or more days, shall be cause to cancel the application(s) without refund of fees. ss EXECUTED at TU c �. (city), wA (state), on cTNOTAR . PUBLIC On this day personally appe filllfl tlne LI44t f Y to me known to be the individual who executed the foregoing instrument and acknowledged that h s ei igned the same as his/ er oluntary act and deed for the uses and purposes mentioned therein. SUBSCRIBED AND SWORN TO BEFORE ME ON THIS /6 D.0 AY OF e.,e,Q,y A.L-e4---" ,20 /'/ on gal Print Name Address Phone Number Signature IC9 ,2011 VG 'ie-t1 L ` 1 0,x-sC 1 i_c4\ i3 e c� 19(02.0 4 i Arc_. S-u) t•1 cx- -t.cuc ,� << w� `i�5'Ilot Zo( 3.n -o a 4-ci X . NOTARY PUBLIC in and for the State of Washington residing at My Commission expires W:\Forms\Applications, Land Use\2011 Applications \ SEPA Environmental Review Application-Jan2011.doc ASSOCIATED ENVIRONMENTAL GROUP, LLC INTERIM SITE REMEDIATION & SUPPLEMENTAL REMEDIAL INVESTIGATION Conducted on: Former SeaTac Motors/Shell Oil Ecology Facility ID No. 46867318 14120 Tukwila International Blvd. Tukwila, Washington Prepared for: Ms. Karen Parsons, President Ben Carol Land Development Corp. 19320 4th Avenue SW Normandy Park, Washington 98166 Prepared and Reviewed by: Leobardo Chaidez Project Geologist AEG Project #: 10-110 Date of Report: April 17, 2012 Yen-V n, P.G., P.H. Prince i a Hydrogeolo PG,P, #128 AHERA No.: 104315 RECEIVED !JUL` 06 20121 COMMUNITY( DEVELOPMENT Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 TABLE OF CONTENTS 1.0 INTRODUCTION 1 1.1 SUBJECT SITE 1 1.2 SITE HISTORY 2 1.3 OBJECTIVES AND SCOPE OF WORK 4 1.4 SITE GEOLOGY AND HYDROGEOLOGY 7 2.0 INTERIM SITE REMEDIATION 8 2.1 SOIL SAMPLING PROCEDURES 8 2.2 QUALITY CONTROLS 9 2.3 INVESTIGATION DERIVED WASTE 9 2.4 IN -SITU BIOREMEDIATION— 1ST PHASE 9 3.0 SUPPLEMENTAL REMEDIAL INVESTIGATION 11 3.1 SOIL SAMPLING PROCEDURES 11 3.2 MONITORING WELL CONSTRUCTION/DEVELOPMENT 12 3.3 GROUNDWATER SAMPLING PROCEDURES 12 3.4 MONITORING WELLS SURVEY 13 3.5 QUALITY CONTROLS 14 3.6 INVESTIGATION DERIVED WASTE 14 4.0 CONCLUSIONS AND RECOMMENDATIONS 15 5.0 LIMITATIONS 18 6.0 REFERENCES 19 FIGURES Figure 1: Figure 2: Figure 3: Figure 4: TABLES Table 1: Table 2: Table 3: Table 4: Table 5: APPENDICES Appendix A: Appendix B: Site & Vicinity Map Site Characterization Interim Remedial Action — Soil Excavation Groundwater Potentiometric Map —February 2012 Summary of Soil Analytical Results — Interim Remedial Action Summary of Soil Analytical Results — Supplemental Remedial Investigation Summary of Quarterly Groundwater Analytical Results Summary of Groundwater Elevation Summary of Water Quality Indicator Parameters Site Photographs (Interim Site Remediation & Supplemental RI) Supporting Documents - Petroleum Contaminated Soil Waste Manifest - Boring Logs - PGS Professional Surveyor Site Exhibit - Laboratory Analytical Results 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 1.0 INTRODUCTION Associated Environmental Group, LLC (AEG) performed an Interim Site Remediation & Supplemental Remedial Investigation (RI) at the former SeaTac Motors/Shell Oil property, located at 14120 Tukwila International Blvd. in Tukwila, King County, Washington (the Site). Written authorization from Ms. Karen Parsons, Ben Carol Land Development Corporation President and Site owner, to perform the remedial action and investigation was provided to AEG in August 2011. Tasks completed for the Interim Site Remediation were based on findings from AEG's previous Preliminary Site Characterization completed in 2010. This task was followed by the 1st Phase of In -Situ Bioremediation where Advanced Oxygen Releasing Compounds were mixed in with clean backfill soil to accelerate the biodegradation of petroleum hydrocarbons in groundwater and saturated soils. The tasks completed during the Supplemental RI included further characterization of the impacted groundwater media at the Site via installation of five monitoring wells. The remedial action and investigation was performed in three phases: 1) Interim Site Remediation was conducted from September through December 2011; 2) 1st Phase In -Situ Bioremediation occurred in October 2011; 3) the subsequent Supplemental Remedial Investigation (RI) involved installation of monitoring wells (MW-4 to MW-10) at locales of confirmed environmental concern in January 2011; and 4) the Baseline Groundwater Monitoring/Sampling Event occurred in February 2012. The scope of work was developed in accordance with the Washington State Department of Ecology (Ecology) Model Toxics Control Act (MTCA) cleanup regulations as they are described in Chapter 173-340 of the Washington Administrative Code (WAC) (Ecology, 2001, and revised 2007). The investigation was performed in general accordance with the American Society for Testing and Materials (ASTM) Standard E 1903-97, Standard Guide Environmental Site Assessments: Phase II Environmental Site Assessment Process and ASTM Standard EE 1689 — 95 (Reapproved 2008), Standard Guide for Developing Conceptual Site Models for Contaminated Sites. 1.1 Subject Site The Site is located on the east side of Tukwila International Boulevard (also known as Washington State Route 99), where South 142nd Street ends at its intersection with Tukwila International Boulevard in the city of Tukwila, Washington. The Site is approximately 0.69 acre in size and corresponds to King County Parcel No. 152304-9123 (Section 15 Southwest quadrangle, Township 23 North, Range 4 East). Figure 1, Site & Vicinity Map, presents the general boundaries and vicinity area of the Site. 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 The Site is currently occupied by UT&T Auto Services. Its automotive repair shop is located on the north side of the property with a shed on the northeast, and a mobile office unit in the southeast corner of the Site. The parking lot is asphalt covered. 1.2 Site History The Site was historically used as retail gasoline station with automotive repair services. King County Assessor's online records indicate that the office building, classified as a prefabricated steel construction, was built in 1955. Records also show that a part of the gasoline station may also have been constructed in the 1950s. The retail gasoline station was originally comprised of three pump islands and four fuel tanks while the automotive repair shop had two service bays. According to Ecology records, the former UST system at the Site consisted of two 3,000-gallon gasoline fuel underground storage tanks (USTs) installed in 1964, and removed in 1989, two 500-gallon USTs (heating oil and waste oil) installed in 1964, and both removed in 1997. In 1990, the owner of the Site at that time submitted a Notice of Permanent Closure of Underground Storage Tanks to Ecology. This notice indicated that five tanks (four USTs and one aboveground storage tank) had been closed and removed from the Site in January 1997. This closure report indicated that a site assessment of the tank closure had been conducted and that no apparent contamination had been encountered. A report detailing the tanks decommissioning activities for this closure has not been provided to Ecology. UST Closure In August 1997, Columbia Environmental, Inc. (CEI) submitted a UST closure report and supporting documentation to Ecology regarding the decommissioning and removal of two USTs at the Site. These USTs consisted of a 500-gallon heating oil UST (Ecology records indicate this tank may have been 555-gallons) and a 500-gallon waste oil UST located on the northern portion of the Site, adjacent to the north wall of the former service station building. The excavation to remove the tanks was completed to approximately six feet below ground surface (bgs). No groundwater was encountered and confirmation soil samples were obtained (CEI, 1997). Laboratory analytical results for an overburden soil ample and one sample collected from the north wall of the excavation pit at approximately four feet bgs, indicated concentrations of heavy -oil -range petroleum hydrocarbons ranging from 15,000 parts per million (ppm) to 32,000 (ppm). Diesel -range petroleum hydrocarbons were also detected at concentrations of 29 ppm to 34 ppm, below the Washington State Department of Ecology (Ecology) Model Toxics Control Act (MTCA) Method A soil cleanup level at that time. CEI reported that these concentrations were due to overfilling practices and not from a tank failure. Some of the petroleum hydrocarbon impacted soil was used as backfill material for the excavation (CEI, 1997). 2 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 Preliminary Site Characterization On February 22, 2010, AEG performed a Preliminary Site Characterization at the Site by advancing six soil borings (B-1 through B-6) to a maximum depth of 20 feet bgs to evaluate the potential presence of petroleum hydrocarbon constituents in soil associated to the former historical usage at the Site as a retail gasoline station, and to assess whether groundwater at the Site had been adversely impacted. Soil and groundwater samples were collected from each boring for laboratory analyses including; gasoline, diesel, heavy oil, mineral oil range TPH, volatile organic compounds (VOC), and heavy metals associated with automotive repair services. Analytical results for the soil samples collected from borings B-3 and B-6, advanced east of the former center pump dispenser, indicated gasoline -range TPH concentrations ranging from 1,930 milligrams per kilogram (mg/Kg) to 2,260 mg/Kg (refer to Figure 2, Site Characterization). Volatile organic compounds, specifically benzene, toluene, ethylbenzene, and total xylenes (BTEX), were also detected at these locations at concentrations above Ecology MTCA Method A soil cleanup level (AEG, 2010). Analytical results for the groundwater samples collected from borings B-3 and B-6, indicated concentrations of VOC and gasoline -range TPH ranging from 750 micrograms per liter (ug/L) to 37,100 ug/L). Benzene was detected in groundwater samples from these borings at concentrations ranging from 22.6 ug/L to 820 ug/L. Toluene, ethylbenzene, and total xylenes were also detected in the groundwater samples (AEG, 2010). AEG concluded the following: "It appears that the areas in the north and east of the Site where former fuel tanks including heating oil/waste oil and gasoline fuel USTs were located and subsequently excavated, decommissioned, and removed exhibit no indications of petroleum hydrocarbons contamination in both soil and groundwater media. However, areas associated with the center pump island (borings B-3 and B-6) are adversely impacted by gasoline range TPH and gasoline fuel associated VOC — specifically BTEX constituents. The estimated vertical extent of impacted soil ranges from approximately seven feet to 16 feet bgs based on analytical results and field observations. It appears that dissolved phase gasoline petroleum hydrocarbons from this area have adversely impacted nearby areas downgradient to the northwest and west, at borings B-4 and B-5, respectively. Based on the locales of petroleum hydrocarbon impact in both soil and groundwater media and the lack of petroleum contamination within the former fuel tanks area, it appears that petroleum hydrocarbon contamination in the vicinity of borings B-3 through B-6, may be associated with the former product lines. However, this assessment is difficult to ascertain without a review of 3 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 9850I Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 blue prints/maps depicting the layout of the former pump islands, product lines, and fuel tanks" (AEG, 2010). 1.3 Objectives and Scope of Work The Remedial Action objectives were to remediate (i.e., cleanup) the Site by removing the source of the petroleum contaminated soil (PCS) via excavation/removal/disposal of PCS (Interim Site Remediation) followed by a staged approach to In -Situ Bioremediation. The remedial action tasks were specific to gasoline -range dissolved phase petroleum hydrocarbons contaminated soil and groundwater media at the Site. The primary objective of the Supplemental Remedial Investigation was to further characterize the lateral and vertical extent of the petroleum impacts to soil and groundwater at the Site, in particular at areas downgradient of the former dispenser islands (the source area of petroleum contamination at the Site). Interim RA The Interim RA included the following Tasks: 1) Excavation, removal, and disposal of petroleum contaminated soil; 2) collect confirmation soil samples from the bottom and sidewalls of the excavation; and 3) conduct the 1st Phase of In -Situ Bioremediation. Specific tasks performed included the following: • Complete a City of Tukwila SEPA Environmental Review and obtain Land Altering and Planning Permits for Site work. • Removal of light pole and fixture over the former center pump island • Removal of overburden concrete pad encompassing the former three pump islands • Excavation of contaminated soil in the area of the former dispenser islands and surrounding areas north and west • Obtained soil samples from the sidewalls of the excavation pit for field screening using a Photoionization Detector (PID) instrument • Collected confirmation soil samples at sidewalls and base of excavation pit to ensure that all accessible PCS have been removed (refer to Figure 3, Interim Remedial Action) • Transport PCS off -site to Waste Management Alaska Street Reload & Recycling for eventual disposal at Wenatchee Regional Landfill • Analyzed soil samples for the following analyses: ❖ Gasoline range TPH via Northwest Method NWTPH-Gx ❖ Associated volatile organic compounds (VOC), specifically benzene, toluene, ethylbenzene, total xylenes (BTEX), via EPA Method 8021B • Conducted 1st Phase In -Situ Bioremediation by incorporating Regenesis Oxygen Releasing Compounds Advanced (ORC) with backfill material into the excavation pit • Backfilled and compacted the excavation pit with clean, imported backfill material • Resurfaced the excavation area with asphalt. 4 I 0 1 8 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 Supplemental Remedial Investigation The Supplemental RI included the following tasks: 1) Drill and install five monitoring wells; and 2) conduct the Baseline Groundwater Monitoring/Sampling Event. Specific tasks performed during the Supplemental Remedial Investigation included the following: • Conducted both public and private utilities locates for the Site. The utility locates were performed by Underground Utilities Locate Center included only areas in the public right-of-ways. Applied Professional Services (APS) provided private utility locates on the Site. • Advanced five borings (MW-1 through MW-5) using a hollow stem auger drilling rig to a maximum depth of 20 1/2 feet below ground surface (bgs). The borings were placed at selected areas to evaluate the residual presence of petroleum hydrocarbons and VOCs in soil and groundwater at the Site. • Logged soil borings documenting lithology encountered, lithology contacts, moisture, density, sample depths, photoionization detection readings, and information regarding sheens and odors, as applicable. Field screened soil samples utilizing a Photoionization Detector (PID) to facilitate the selection of appropriate soil samples to be submitted to the analytical laboratory. • Collected soil samples for laboratory analyses from each of the borings at depths ranging from 6 feet bgs to the total depth explored of 20 1/2 feet bgs. The soil samples were handled in accordance with industry standard chain -of -custody protocols and transported to Libby Environmental Chemistry Laboratory, Inc., in Olympia, Washington, for analysis. • Analyzed soil samples for the following constituents of concern: •:� Gasoline range TPH via Northwest Method NWTPH-Gx; ❖ Gasoline associated VOCs, specifically benzene, toluene, ethylbenzene, total xylenes. • Completed the five boreholes as monitoring wells (MW-1 through MW-5) to a total depth of 20 feet bgs. The monitoring well design and field methods employed during this work conform to requirements and specifications outlined in Washington Administrative Code 173-160 for "resource protection wells" in the State of Washington. The 2-inch schedule 40 PVC wells were screened from 5 feet to 20 feet bgs. Well screen casing mated to an appropriate length of solid riser to one -quarter of a foot below land surface. Well screen annular sand pack was established from two feet above the screen to total depth. Silica sand used appropriately matched the (0.020 inch) screen slot size. A bentonite seal was placed from the top of the sand pack to approximately two feet below ground surface. A surface -flush steel monument was cemented in place above the 5 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 bentonite seal. Boring logs and well schematics are presented in Appendix B, Supporting Documents. • The monitoring wells were mechanically developed via a surge block and swabbed. Groundwater was developed and purged from each well until the discharge was clear of sediment and clear in color. A minimum of 30 gallons was purged from each well during development. Purge water was contained onsite in steel DOT approved 55 gallon steel drums. • AEG conducted groundwater monitoring activities at MW-1 through MW-5 prior to collection of samples for laboratory analysis. The following activities were conducted: ❖ Obtained depth -to -water measurements at all newly constructed monitoring wells; ❖ Conducted limited well development/purge via the peristaltic pump; ❖ Recorded water quality indicator parameters including pH, conductivity, temperature, dissolved oxygen, total dissolved solids, and salinity; ❖ Collected representative groundwater samples from each of the monitoring wells in laboratory provided containers. The containers were labeled and placed in a portable chilled ice chest and transported to Libby Environmental Chemistry Laboratory (Libby Lab) following standard chain -of -custody procedures. • Groundwater samples were collected via EPA low -flow purge technique once the key indicator field parameters have stabilized. Groundwater samples were handled, labeled appropriately, and placed in laboratory provided containers and placed in an ice chest below 4 degrees Celsius. Groundwater samples were collected in laboratory provided containers and included 40 milliliter (ml) glass VOAs (vials) for gasoline range TPH and VOC analyses. • Analyzed groundwater samples for the following constituents of concern: ❖ Gasoline range TPH via Northwest Method NWTPH-Gx; ❖ Gasoline associated VOCs, specifically benzene, toluene, ethylbenzene, total xylenes. • Compared soil and groundwater analytical results to Ecology MTCA Method A cleanup levels for soil and groundwater • AEG retained a Professional Licensed Surveyor, Pacific Geomatic Services, Inc., to survey the elevations of the newly installed monitoring wells and existing well, MW-1. Ground surface and casing elevations at each well were surveyed to the nearest 0.01 foot relative to an assigned benchmark. • Prepared this report containing a summary of the two phases of subsurface investigations including the subsurface conditions encountered, a discussion of soil and groundwater analytical laboratory results, general findings, and recommendations. 6 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 1.4 Site Geology and Hydrogeology The Site is located within the Puget Sound Basin in western Washington. The Puget Sound is a north -south trending trough located between the Olympic Mountains to the west and the Cascade Mountains to the east. The topography is dominated by north -south trending valleys and low, nearly flat-topped highlands cut by streams. The topographic surface of southern King County is largely the result of erosion and deposition during, and since the last glaciations (the last 15,000 years). According to the Geologic Map of Washington, Northwest Quadrant, the Site and vicinity area are underlain by glacial Quaternary period age deposits, described as undifferentiated drift till of pre -Fraser age (Qgp). The Quaternary till deposits typically consist of "till and outwash sand and gravel; commonly oxidized or stained orange. Includes part of the Salmon -Springs drift" (Dragovich, J.D., Logan, R.L., 2002). The subsurface conditions observed at the Site during the excavation generally consist of silt and silty clay from ground surface to approximately six to nine feet bgs. These deposits were underlain by silt and silty clay to the maximum excavation depth of 16 feet bgs. Silty sand with variable amounts of gravel was identified during the drilling of boreholes to install monitoring wells at approximately 14 bgs to the total depth of the boreholes, at 20 1/2 feet bgs. Wet soil was encountered during well installation ranging in depth from 5 feet in monitoring well MW-2 to 11 feet bgs in well MW-5. The aquifer bearing zone is perched. The nature of the soils in the water -bearing zone appears to range from sandy silt to silty sand. Groundwater seepage was encountered during excavation activities during the Interim Site Remediation at approximately 15 to 16 feet bgs. AEG conducted the baseline initial quarterly groundwater event on February 16, 2012. The static water levels at the newly constructed monitoring wells ranged from 4.43 to 5.13 feet bgs. The direction of shallow groundwater flow at the Site during the February 2012 quarterly groundwater event was generally to the west-northwest (refer to Figure 4, Groundwater Potentiometric Map — February 2012). 7 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 2.0 INTERIM SITE REMEDIATION From September 27 through September 30, 2011, AEG and subcontractor Advance Environmental, Inc. excavated petroleum contaminated soil from areas associated with the former pump islands at the Site — the source area of contamination. During the progression of the excavation, soil samples were consistently collected from the sidewalls and bottom of the excavation pit and field screened for petroleum hydrocarbon volatiles using a PID instrument to assist in defining the lateral and vertical extents of impact. Confirmation soil samples were collected at the base and sidewalls of the excavation and submitted to a Washington State certified laboratory for analysis. The samples were submitted for analysis of gasoline range TPH and associated VOCs. The final dimensions of the irregular shaped excavation pit were approximately 55 feet wide by 40 feet long and 16 feet deep. Groundwater seepage was encountered during excavation activities at approximately 15 to 16 feet bgs. Figure 3, Interim Remedial Action - Soil Excavation, presents an approximate area of excavation, site features, and locales of soil samples collected. Photo documentation of the soil excavation and transport/removal of the soil is presented in Appendix A, Site Photographs. 2.1 Soil Sampling Procedures Soil samples were collected and observed to document soil lithology, color, moisture content, and sensory evidence of impairment. To comply with appropriate health and safety practices in the field, soil samples obtained from a depth greater than four feet bgs in the excavation were collected by AEG's field representative from the bucket of the excavator at ground surface. Extensive soil samples were collected throughout the excavation in order to delineate the vertical and horizontal extent of petroleum impacted soil. A total of 17 soil samples were collected during excavation activities; 14 of the samples were confirmation soil samples collected from the sidewalls and bottom of the excavation pit from approximately 10 1/2 to 15 1/2 feet bgs. Two samples were also collected from the excavation stockpile (ST1 and ST2) for laboratory analysis. All soil samples were immediately transferred to laboratory provided pre -weighted 40-m1 VOA glass vials with septum sealed Teflon -lined screw caps and 4 oz. glass jars. Soil sampling for VOCs and field preservation methods followed methods set forth by Ecology's Method 5035A, "Collecting and Preparing Soil Samples for VOC Analysis" which minimizes VOC losses. The soil samples were placed in a portable chilled ice chest and transported to Libby Environmental Chemistry Laboratory (Libby), a Washington state certified analytical laboratory located in Olympia, Washington, for analysis following industry standard chain -of -custody procedures. Table 1, Summary of Soil Analytical Results — Interim Remedial Action, presents• a list of soil samples collected, their location and depth within the excavation. Soil laboratory analytical results are provided in Appendix B, Supporting Documents. Photo documentation of the soil 8 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 excavation activities and tank decommissioning/removal activities are presented in Appendix A, Site Photographs. 2.2 Quality Controls All soil samples were collected in general accordance with industry protocols for the collection, documentation, and handling of samples. Descriptions of soil and sampling depths were carefully logged in the field, and AEG confirmed sample depths as soil samples were collected. Soil samples were tightly packed into jars to eliminate sample headspace. Upon sampling, all samples were placed immediately into chilled ice chests or immediately delivered to the mobile laboratory. All samples were transported and submitted under standard chain -of -custody protocols and remained refrigerated until delivery to Libby analytical laboratory. The laboratory provided standard quality assurance/quality control (QA/QC) which included the following: surrogate recoveries for each sample, method blank results, duplicate analyses, matrix or blank spiked analyses, and duplicate spiked analyses. 2.3 Investigation Derived Waste A total of 984 tons of petroleum contaminated soil was excavated from the area of the former pump islands. The excavated soil was immediately loaded onto trucks stationed at the Site and transported to Waste Management Alaska Street Reload and Recycling facility in Seattle, Washington, for transport and final disposal at Waste Management's Wenatchee Regional Landfill in Wenatchee, Washington. Final documentation for the tonnage of soil excavated is provided in Appendix B. 2.4 In -Situ Bioremediation — Ist Phase Enhanced soil bioremediation was selected to address any remaining hydrocarbon residuals in the subsurface after removal of the affected soil by means of excavation. Regenesis®' Oxygen Releasing Compounds — Advanced (ORCa) formula was selected as a secondary remedial technology to accelerate the microbial degradation of remaining petroleum hydrocarbons in soil. ORC is a calcium oxy-hydroxide that provides controlled -release molecular oxygen to the subsurface environment where it will accelerate the rate of naturally occurring aerobic contaminant biodegradation in groundwater and saturated soils. ORCa, 2000 pounds, was mixed with clean soil (pit run) to backfill the excavation pit. The ORCa was dispersed in the excavation as dry powder during backfill phase at lifts of approximately two to three feet. ORC/soil mix was brought up from the bottom of the excavation to the vadose zone (to approximately 6 to 7 feet bgs) to account for the anticipated groundwater smear zone in the 9 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 subsurface. The amount of ORCa used in the excavation was calculated following the weight/weight percent of ORC/backfill material recommended by Regenesis®, the ORCa manufacturer. Photo documentation of ORC incorporation with backfill material is presented in Appendix A. 10 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 3.0 SUPPLEMENTAL REMEDIAL INVESTIGATION Five monitoring wells were installed at the Site by AEG during February 6 and 7, 2012, at locations depicted in Figure 4 to assess the groundwater media at the Site and the extent of dissolved phase gasoline petroleum hydrocarbons impact. Borehole drilling and well construction was conducted by Western States Soil Conservation of Hubbard, Oregon. The borings were drilled and sampled to a maximum depth of 20 1/2 feet bgs using a CME-75 hollow stem auger drilling rig with 8-inch outside diameter augers. The monitoring wells were completed at surface with traffic -rated well boxes installed flushed with the surface. Ecology well tags were assigned to each monitoring well. Well MW-1, MW-2, and MW-3 were placed adjacent to the former center pump island, downgradient to the northwest, and downgradient to the west of the pump islands, respectively. Monitoring wells MW-4 was placed on the east side of the Site, within the area of the former fuel tanks. Well MW-5 was installed south of the former pump islands on the southern area of the property. The monitoring wells will enable AEG to assess the groundwater quality at the Site after the petroleum contaminated soil excavation/removal and 1St Phase of In -Situ Bioremediation. Additionally, AEG will be able to assess ongoing groundwater quality on a quarterly basis as necessary to meet Ecology requirement as part of MTCA regulatory cleanup activities. The Baseline Quarterly Groundwater Monitoring and Sampling Event was conducted in February 2012. Photo documentation of the supplemental subsurface investigation is presented in Appendix A. 3.1 Soil Sampling Procedures Soil samples were collected utilizing a two-inch, inside diameter, stainless steel split barrel sampler. Soil was observed to document lithology, color, moisture content, and sensory evidence of impairment. All soil samples collected were screened in the field for organic vapor content utilizing a PID instrument. The PID field screening results showed a detection of 62 volumetric parts per million (Vppm) and 133 Vppm in soil samples collected at approximately 11 feet bgs in borehole MW-1 and MW-4, respectively. The PID readings are presented in the soil boring logs. Once collected, soil samples were immediately transferred to laboratory provided containers. All soil samples were placed in a portable chilled ice chest. Soil sampling for VOC and field preservation methods followed methods set forth by Ecology's Method 5035A, "Collecting and Preparing Soil Samples for VOC Analysis" which minimizes VOC losses. The samples were couriered the day of collection to Libby Environmental, Inc. a Washington State certified analytical laboratory located in Olympia, Washington. Soil samples were appropriately handled and transported following industry standard chain -of -custody procedures. 11 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 Selected soil samples were analyzed for gasoline range TPH and BTEX (refer to Table 2, Summary of Soil Analytical Results — Supplemental RI). All analytical soil results were compared to Ecology MTCA Method A soil cleanup levels. Boring logs and soil laboratory analytical results are provided in Appendix B. 3.2 Monitoring Well Construction/Development The monitoring well design and construction methods conformed to requirements and specifications outlined in Washington Administrative Code 173-160 for "resource protection wells" in the State of Washington. All monitoring wells were completed at 20 feet bgs based on the previous Preliminary Site Characterization and PCS excavation work conducted by AEG. The monitoring wells were installed to a total depth of 20 feet with 15 feet of 2-inch diameter, 0.020-inch machine slotted PVC well screen mated to 2-inch diameter, threaded, flush joint PVC riser pipe to the surface. As -built schematics for the well logs are presented in Appendix B. The annulus of each boring was additionally backfilled with a pre -sieved Colorado 10x20 grade annular silica sand pack from the bottom of the casing to approximately two feet above the top of the well screen. A two -foot thick bentonite seal was placed above the sand pack to prevent the infiltration of surface water along the well casing and to stabilize the upper section of the well. The wells were completed as flush -mounted monitoring wells. The wells were mechanically developed by Western State Soil Conservation using a surge block and surging and pumping ground water from each monitoring well. Well development was conducted to compact the filter pack, and remove fine-grained sediment from the filter pack and well bore. Development was considered complete when the well produced water that was clear and relatively free of sediment. Approximately 20 to 30 gallons of purge water was developed from each well. The completed monitoring wells were purged and developed prior to collecting representative groundwater samples for analysis. 3.3 Groundwater Sampling Procedures AEG conducted a Baseline Groundwater Monitoring and Sampling Event in February 2012 as part of a long-term groundwater quality monitoring program to be conducted. Quarterly groundwater events will be to assess the efficacy of Interim Site Remediation and assess the groundwater quality with the objective of achieving Ecology MTCA Method A groundwater cleanup levels for the constituents of concern. The baseline groundwater monitoring and sampling activities were conducted on February 16, 2012. Prior to sampling, depth -to -water measurements were obtained by using an electronic water level indicator. The static water level in the wells at the Site ranged from 4.43 feet in well MW-1, to 5.13 feet in well MW-5, measured from the top of casing. 12 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 Prior to sample collection, all monitoring wells were purged of a minimum of three well casing volumes of groundwater or until the field parameters, including pH, temperature, specific conductance, dissolved oxygen, and/or total dissolved solids have stabilized. Table 5, Summary of Water Quality Indicator Parameters, presents the final stabilized field parameters at each well during the monitoring phase. The wells were sampled with dedicated polyethylene tubing using the peristaltic pump to mitigate cross contamination during groundwater sampling activities. Groundwater samples were collected from al the wells with the use of a peristaltic pump and dedicated 0.170" ID x 1/4" OD polyethylene tubing to prevent cross contamination during sampling. Permanent dedicated tubing was installed in each of the wells for sample collection following U.S. EPA approved low -flow purge technique. Groundwater samples were collected in laboratory provided 40 milliliter (mL) glass VOAs (vials) for gasoline -range TPH using Method NWTPH-Gx, and for BTEX analyses using EPA Method 8021B. Table 3, Summary of Quarterly Groundwater Analytical Results, presents analytical groundwater results as compared to Ecology MTCA Method A groundwater cleanup levels. All samples were transported the day of sample collection and submitted under standard chain -of -custody protocols to Libby Environmental Inc. To reasonably ensure the purity of AEG's samples, the following actions were taken (1) nitrile gloves were used in handling all sampling containers and sampling devices; (2) the groundwater monitoring equipment was scrubbed with Alconox detergent and rinsed with water prior to each sample extracted; and (3) the containers were then placed in a chilled cooler and transported under a chain -of -custody to Libby Environmental Chemistry Laboratory, a Washington State certified analytical laboratory located in Olympia, Washington with a standard five day laboratory turn -around -time. 3.4 Monitoring Wells Survey All monitoring wells installed during this effort were surveyed by licensed surveyors from Pacific Geomatic Services, of Mountlake Terrace, Washington, on March 12, 2012. The purpose for the survey was to establish elevation data relating the land surface to the potentiometric surface of the shallow groundwater. Vertical and horizontal datum was established using the Washington State Department of Transportation monument identifiers in North American Vertical Datum (NAVD) 88 and North American Datum (NAD) 83/91, respectively. Horizontal datum is established using the Washington State Plane North Coordinate System. Ground surface and top of casing elevations were surveyed to the nearest 0.01 foot. The groundwater elevations were measured from the top of the PVC monitoring well casing (north side). Table 4, Summary of Groundwater Elevations, presents the depth -to -water and associated groundwater elevations for all monitoring wells. 13 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 3.5 Quality Controls All soil and groundwater samples were collected in general accordance with industry protocols for the collection, documentation, and handling of samples. Descriptions of soil and sampling depths were carefully logged in the field, and the drillers and geologist confirmed sample depths as soil samples were collected. A site map showing boring locations was completed prior to leaving the Site. Soil samples were tightly packed into jars to eliminate sample headspace. Water samples were filled carefully in the sampling bottles to prevent volatilization. Upon sampling, all samples were placed immediately into chilled ice chests. All samples were transported the day of sample collection and submitted under standard chain - of -custody protocols to Libby Environmental Inc. The laboratory provided standard quality assurance/quality control (QA/QC) which included the following: surrogate recoveries for each sample, method blank results, duplicate analyses, matrix or blank spiked analyses, and duplicate spiked analyses. 3.6 Investigation Derived Waste Investigation derived waste generated at the Site during this project consisted of soil cuttings from the subsurface exploration activities, decontamination water generated during the decontamination of the hollow stem auger, and purge water collected during groundwater sampling activities. These wastes were placed in approved Department of Transportation (DOT) 55-gallon steel drums and stored at the Site for subsequent characterization and disposal. Nine soil drums and two water drum were generated during the investigation. 14 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 4.0 CONCLUSIONS AND RECOMMENDATIONS The findings and conclusions derived from the Interim Site Remediation and Supplemental Remedial Investigation at the Former SeaTac Motors property are as follows: • Petroleum contaminated soil was encountered adjacent to and in vicinity area of the former dispenser islands at the Site to approximately 15 feet bgs where groundwater was encountered. • AEG directed Advance Environmental Inc. to over -excavate the entire excavation pit to approximately 16 feet bgs. Confirmation soil samples indicated that PCS remains at the Site from approximately 10 /2 feet bgs to 16 feet bgs on the west, northwest, and southwest extents of the excavation as well as in the northern area of the excavation (refer to Table 1 and Figure 3). The vertical extent of exploration was hindered by the presence of groundwater at approximately 15 to 16 feet bgs. Further PCS removal in these areas was partially hindered due to the structural integrity of the automotive repair shop to the north and underground utilities to the west-northwest. However, the bulk source removal was in keeping with the planned remedial action objectives for the Site which was to excavate/remove the petroleum contaminated soil (Interim Site Remediation) and followed by a staged approach to In -Situ Bioremediation to accelerate the biodegradation of the contaminants of concern - petroleum hydrocarbons and associated volatile organic compounds. • 984 tons of petroleum contaminated soil was excavated and removed from the Site. The PCS was transported offsite to Waste Management Alaska Street Reload and Recycling facility in Seattle, Washington, for final transport to Waste Management Wenatchee Regional Landfill facility in Wenatchee, Washington, an authorized landfill facility. • Soil samples were collected throughout the excavation in order to delineate the vertical and horizontal extent of petroleum impacted soil and thus removal. A total of 17 soil samples were collected during the excavation activities. Confirmation soil samples were analyzed for gasoline -range TPH via Northwest Method NWTPH-Gx, and associated VOCs, specifically BTEX constituents, via EPA Method 8021B. The final extent of the excavation was approximately 55 feet wide by 40 feet in long by 16 feet in deep. • Laboratory analytical results of confirmation soil samples indicated notable reduction in petroleum contaminated soil at the source area where gasoline range TPH concentrations ranged from no detection to a high of 272 mg/Kg and benzene, the most volatile of VOCs, ranged from no detection to a high of 1.06 mg/Kg. Ecology MTCA Method A 15 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 soil cleanup levels for these constituents are 30 mg/Kg and 0.03 mg/Kg, respectively (refer to Table 1 and Figure 3). • The excavation pit was backfilled with clean soil, compacted to surface, and the excavated area was asphalted at surface. • Perched groundwater was encountered from approximately 15 to 16 feet bgs during subsurface soil excavation. • The 1st Phase of In -Situ Bioremediation was completed by mixing 2,000 pounds of ORCa with backfill material from the bottom of the excavation to approximately 6 to 7 feet bgs, to accelerate the microbial degradation of remaining petroleum hydrocarbons in soil and groundwater. • AEG installed five monitoring wells (MW-1 through MW-5) at the Site on February 6, 2012 to further characterize the lateral and vertical extent of the petroleum impacts to soil and groundwater at the Site, in particular at areas downgradient of the former dispenser islands (the source area of petroleum contamination at the Site). • Laboratory analytical results for soil samples collected during this phase of RI indicated impacted soil only at boring MW-4, located within the former fuel tanks area on the eastern side of the Site. Elevated concentrations of gasoline range TPH, up to 1,070 mg/Kg at 11 — 11 1/2 feet bgs, was reported (refer to Table 2). • Laboratory analytical results of groundwater samples collected during the Baseline Quarterly Groundwater Event conducted in February 2012 indicated presence of elevated gasoline range TPH (ranging from 1,270 to 3,370 ug/L) at monitoring wells MW-1 (located in the center of the former dispenser islands), MW-3 (located downgradient to the west and near the western Site property boundary), and MW-4. Elevated benzene was detected only at MW-3, at 121 ug/L. These concentrations are above Ecology cleanup levels (refer to Table 3). • Perched groundwater was present throughout the Site at all monitoring wells and ranged in depth from 4.43 feet to 5.13 feet bgs. The direction of groundwater flow during the February 2012 Baseline Quarterly Groundwater Event was generally west -northwesterly (refer to Table 4 and Figure 4). 16 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 Discussion: The objectives of the Interim Site Remediation were met by removal of the bulk source of petroleum contamination at the Site. Enhanced insitu bioremediation, via incorporation of ORC throughout the vadose zone and smear zone (to depths of 16 feet bgs), will accelerate the biodegradation of the contaminants of concern, the residual gasoline range TPH and associated volatile organic compounds. Based on laboratory analytical results of confirmation soil samples collected during the PCS excavation activities, residual soil contamination, at significantly reduced concentrations, remains at areas generally west and north of the former dispenser islands. Analytical results of groundwater collected from monitoring wells located downgradient of the source area (the former dispenser islands) indicated presence of elevated gasoline range TPH and/or benzene. Continued reduction of these constituents in groundwater is expected due to ongoing biodegradation of these contaminants via the enhanced insitu bioremediation activities completed and the bulk source removal of contamination at the Site. Recommendation: AEG recommends continuation of Quarterly Groundwater Monitoring/Sampling Events to assess the hydrogeologic regime at the Site and evaluate the groundwater quality as gasoline range TPH and associated volatile organic compounds biodegrade. These quarterly events will also enable AEG to assess whether additional application of ORCa (by injection via a direct push probe drilling rig) is necessary. AEG also recommends that the Site be enrolled into Ecology Voluntary Cleanup Program (VCP) in order to petition Ecology for a determination of No Further Action (NFA) status upon completion of remediation of impacted groundwater and achieving four quarterly groundwater events where the constituents of concern are either not detected or detected below MTCA Method A cleanup levels. Ecology can provide technical inputs on remedial actions completed and findings from quarterly groundwater monitoring/sampling events. These inputs from Ecology will be necessary prior to petitioning Ecology for the NFA determination. 17 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 5.0 LIMITATIONS This report summarizes the findings of the services authorized under our agreement. It has been prepared using generally accepted professional practices, related to the nature of the work accomplished. This report was prepared for the exclusive use of Ben Carol Land Development Corp., or its designated representatives for the specific application to the project purpose. Recommendations, opinions, site history and proposed actions contained in this report apply to conditions and information available at the time this report was completed. Since conditions and regulations beyond our control can change at any time after completion of this report, or our proposed work, we are not responsible for any impacts of any changes in conditions, standards, practices and/or regulations subsequent to our performance of services. We cannot warrant or validate the accuracy of information supplied by others, in whole or part. 18 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com Associated Environmental Group, LLC Interim Site Remediation & Supplemental RI Former SeaTac Motors/Shell Oil — Tukwila, WA AEG Project No. 10-110 April 17, 2012 6.0 REFERENCES American Society for Testing and Materials (ASTM) Standard E 1903-97, Standard Guide Environmental Site Assessments: Phase II Environmental Site Assessment Process. Associated Environmental Group (AEG), 2010. Preliminary Site Characterization, Former SeaTac Motors/Shell Oil, Ecology Facility ID No. 46867318, Tukwila, Washington.. ASTM Standard EE 1689 — 95 (Reapproved 2008), Standard Guide for Developing Conceptual Site Models for Contaminated Sites. Schuster, J.E., Gulick, C.W., et al, 1997. Geologic Map of Washington, Southeast Quadrant, Washington Division of Geology and Earth Resources Geologic Map GM-45. Washington State Department of Natural Resources; 7.5 Minute Geological Maps of Washington, November 2010. 19 1018 CAPITOL WAY S, SUITE 201 • OLYMPIA, WA • 98501 Phone: 360.352.9835 • Fax: 360.352.8164 • Email: admin@aegwa.com FIGURES PROJECT LOCATION Notes: (1) The locations of all features shown are approximate. (2) This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. Reference: Drawing created from notes provided by AEG, LLC. PAWN SHOP 1 Ei S 142nd ST I 01 — J I I I I I l I I 1 DRAWING SCALE: 1 "= 100' 141 ST u, ,, ROp RT ERl (#. X • s S 154 sr VICINITY MAP of sr..Allr — S 141st ST - 1-5 EXIT 154A a 0 FORMER MOTEL SITE PROPERTY LINES (TYPICAL) \-O's � POPN� of ASSOCIATED ENVIRONMENTAL GROUP, LLC 1728 State Avenue NE, Suite 101 Olympia, WA 98506 (360) 352-9835 Fax (360) 352-8164 FIGURE 1 SITE & VICINITY MAP FORMER SEATAC MOTORS 14120 TUKWILA INT'L BLVD TUKWILA, WA File: BC LAND DEVELOPMENT I Sheet 1 OF 2 Project# 10-110 Date: 2/25/2010 0 J CO J z 0 z CC LiJ z J (75 LEGEND — E — Q B-1 BURIED POWER LINE PROPERTY LINES (FENCED) BORING SAMPLES BY AEG -1 J 1 QB-4 ri ji1 MW1 Lj , Q S , / B-6 /. MW- Lf)B-5 4,/ / i �, <J Q B-3 DUMPSTER PAD ABOVE GROUND TANK FORMER PUMP ISLAND LOCATIONS MW-a T NTS OF EXCAVATION FOR UST REMOVAL DRAWING SCALE: 1 "= 30' 1 Notes: (1) The locations of all features shown are approximate. (2) This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. Reference: Drawing created from surveyor's drawing by PACIFIC GEOMATIC SERVICES, Inc and notes provided by AEG, LLC ASSOCIATED ENVIRONMENTAL GROUP, LLC 1018 Capitol Way S, Suite 201 Olympia, WA 98501 (380) 352-9835 Fax (380) 352-8184 FIGURE 2 SITE CHARACTERIZATION FORMER SEATAC MOTORS 14120 TUKWILA INT'L BLVD TUKWILA, WA Project# 10-110 Date: 02/29/2012 He: FILE NAME Sheet 2 OF 3 GO z F— Q z z 0 N DUMPSTER PAD S-WN-11.5 S-WM-10.5 FORMER PUMP ISLAND LOCATIONS J 0 LEGEND r LJ B—NW-12 B-N-14.5 S-N-11 B—W-11.5 * EX1—W-13,5 S—SW-6 B—SW-12.5 S—SW-12 * B—SW-12.5 (fi%2R/11) / / / / / / ( 4 B-S-12.5 EXTENTS OF EXCAVATION 9/30/2011 DRAWING SCALE: 1 "= 20' REMEDIATION EXCAVATION LIMITS — - - — PROPERTY LINES (FENCED) 4 B-S-6 EXCAVATION BOTTOM SAMPLE -LOCATION -DEPTH S-N-6 EXCAVATION SIDEWALL SAMPLE -LOCATION -DEPTH ABOVE GROUND TANK B-N-11.5 SHED S-NE-15.5 B-NE-15 Notes: (1) The locations of all features shown are approximate. (2) This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. Reference: Drawing created from surveyor's drawing by PACIFIC GEOMATIC SERVICES, Inc and notes provided by AEG, LLC ASSOCIATED ENVIRONMENTAL GROUP, LLC 1018 CAPITOL WAY S, Suite 201 Olympia, WA 98501 (380) 352-9835 Fax (360) 352-8164 FIGURE 3 INTERIM REMEDIAL ACTION SOIL EXCAVATION FORMER SEATAC MOTORS 14120 TUKWILA INT'L BLVD TUKWILA, WA Project/ 10-110 Date: 02/29/2012 File: FILE NAME Sheet 3 0F3 Hg LEGEND — E — BURIED POWER LINE — - - — PROPERTY LINES (FENCED) t9 MW-2 MONITORING WELLS BY AEG DUMPSTER PAD ABOVE GROUND TANK DRAWING SCALE: 1 "= 30' Notes: (1) The locations of all features shown are approximate. (2) This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. 1 EXTENTS OF EXCAVATION FOR UST REMOVAL Reference: Drawing created from surveyor's drawing by PACIFIC GEOMATIC SERVICES, Inc and notes provided by AEG, LLC ASSOCIATED ENVIRONMENTAL GROUP, LLC 1018 CAPITOL WAY S, Suite 201 Olympia, WA 98501 (380) 352-9835 Fax (380) 352-8184 FIGURE 4 - GROUNDWATER POTENTIOMETRIC MAP FEBRUARY 2012 FORMER SEATAC MOTORS 14120 TUKWILA INT'L BLVD TUKWILA, WA Project/ 10-110 Date: 03/26/2012 File: Sheet 3 OF 3 TABLES Table 1 Summary of Soil Analytical Results - Interim Remedial Action Former SeaTac Motors Tukwila, WA Sample Number Sample Location i Sample 6 Type Sample Depth (feet) Date Sampled Select Volatile Organ'c Compounds2 (mg/Kg) 3 Gasoline TPH (mgfico 4 Total Lead (mg/Kg) Benzene Toluene Ethylbenzene Total Xylenes EX1-W-13.5 West E 13.5 9/27/2011 <0.02 <0.10 0.66 0.31 20 -- ST 1 Stock pile E -- 9/28/2011 <0.02 <0.10 <0.05 <0.15 <10 -- ST 2 Stock pile E -- 9/28/2011 <0.02 <0.10 <0.05 <0.15 <10 -- B-NE-15.0 Base, Northeast C 15.0 9/28/2011 0.11 0.16 0.67 0.83 13.8 -- S-NE-15.5 Sidewal, Northeast C 15.5 9/28/2011 <0.02 <0.10 <0.05 <0.15 <10 -- B-N-14.5 Base, North C 14.5 9/28/2011 0.049 0.05 0.047 0.101 <10 -- B-SW-12.5 Base, Southwest C 12.5 9/28/2011 0.066 <0.10 0.11 0.077 <10 -- S-SW-6.0 Sidewall, Southwest E 6.0 9/28/2011 0.031 <0.10 <0.05 <0.15 <10 -- S-WN-11.5 Sidewall, West-northwest C 11.5 9/29/2011 0.088 0.079 0.31 0.35 <10 -- B-NW-12 Base, Northwest C 12.0 9/29/2011 <0.02 <0.10 <0.05 <0.15 <10 -- S-WM-10.5 Sidewall, West Central C 10.5 9/29/2011 0.60 0.52 2.02 1.49 92 -- B-W-11.5 Base, West C 11.5 9/29/2011 0.16 <0.10 <0.05 0.53 25 -- B-SW-12.5 Base. Southwest C 12.5 9/29/2011 0.054 <0.10 0.10 0.13 <10 -- S-SW-12 Sidewall, Southwest C 12.0 9/29/2011 1.06 1.21 5.07 9.77 272 -- B-S-12.5 Base, South C 12.5 9/29/2011 <0.02 <0.10 <0.05 <0.15 <10 -- B-N-11.5 Base, North C 11.5 9/29/2011 0.15 0.12 1.56 0.98 <10 -- S-N-11 Sidewall, North C 11.0 9/29/2011 <0.02 <0.10 <0.05 <0.15 <10 -- PQL 0.02 0.10 0.05 0.15 10 5 Ecology MTCA Method A Cleanup Levels 0.03 ' 7 6 9 30 5 250 Notes: 'Approximate sample locations shown in Figure 3 2Analyzed by EPA 8021B or 8260B. 3Analyzed by Northwest Method NWTPH-Gx 4Analyzed by EPA Method 7421 5Cleanup level with presence of benzene 6Type of soil sample collected: 1) E = excavation soil sample; 2) C = confirmation soil sample mg/Kg - milligrams per kilogram "<"= not detected above laboratory limits *= gas range total petroleum hydrocarbon cleanup level with presence of benzene -- =Not tested for this constituent or not applicable PQL=Practical Quantitation Limits Bold indicates the detected concentration exceeds Ecology MTCA Method A soil cleanup level Former SeaTac Motors/Shell Oil Soil Results Associated Environmental Group, LLC Table 2 Summary of Soil Analytical Results - Supplemental RI Former SeaTac Motors/Shell Oil Tukwila, WA Sample Number' Date Sampled Depth Sampled (feet) Gasoline TPHZ (mg/Kg) Select Volatile Organic Compounds3 (mg/Kg) Benzene Toluene Ethylbenzene Total Xylenes MW2-S2-10.5/11.5 2/6/2012 10.5-11.5 <10 <0.02 <0.10 <0.05 <0.15 MW2-S4-20.5/21.5 2/6/2012 20.5-21.5 <10 <0.02 <0.10 <0.05 <0.15 MW3-S2-10.5/11.5 2/6/2012 10.5-11.5 <10 <0.02 <0.10 <0.05 <0.15 MW3-S4-20.5/21.5 2/6/2012 20.5-21.5 <10 <0.02 <0.10 <0.05 0.34 MW4-S1-11/11.5 2/7/2012 11.0-11.5 1,070 <0.02 <0.10 2.41 1.97 MW4-S2-20/21.5 2/7/2012 20.0-21.5 45.8 <0.02 <0.10 0.10 0.10 MW5-S1-6/6.5 2/7/2012 6.0-6.5 <10 <0.02 <0.10 <0.05 <0.15 MW5-S2-10.5/11.5 2/7/2012 10.5-11.5 <10 <0.02 <0.10 <0.05 <0.15 PQL 10 0.02 0.10 0.05 0.15 Ecology MTCA Method A Clean Up Levels 30 4 0.03 7 6 9 Notes: 'Approximate sample locations are shown in figure 2 2Gasoline range total petroleum hydrocarbons (TPH). Analyzed by NWTPH-Gx 3Select Volatile Organic Compounds. Analyzed by EPA Method 8021B or 8260B 4Cleanup level with presence of benzene mg/Kg = milligrams per kilograms MTCA = Model Toxics Control Act PQL=Practical Quantitation Limits - = not analyzed for this constituent < = not detected above laboratory limits * Ecology has not designated a MTCA Method A cleanup level for this constituent Bold indicates the detected concentration exceeds Ecology MTCA Method A cleanup level Former SeaTac Motors/Shell Oil Soil Results Associated Environmental Group, LLC Table 3 Summary of Quarterly Groundwater Analytical Results Former SeaTac Motors/Shell Oil Tukwila, WA Well Number Date Sampled Gasoline TPH2 (ug/L) Select Volatile Aromatic Compounds3 (ug/L) Benzene Toluene Ethylbenzene Total Xylcnes MW-1 2/16/12 1,270 2.7 3.6 96.9 87.1 MW-2 2/16/12 <100 <1 <2 <1 <3 MW-3 2/16/12 3,370 121 21.5 69.2 94.7 M W-4 2/16/12 2,380 <1 <2 <1 23.2 MW-5 2/16/12 <100 <1 <2 <1 <3 PQL 100 1 2 1 3 Ecology MTCA Method A Clean Up Levels 8004 5 1,000 700 1,000 Notes: 'Monitoring well locations are shown in figure 2 2Gasoline range total petroleum hydrocarbons (TPH). Analyzed by Northwest Method NWTPH-Gx. 3Select Volatile Organic Compounds. Analyzed by EPA Method 8021 B or 8260C. 'Cleanup level with presence of benzene ug/L= micrograms per liter = not analyzed for constituent < = not detected above laboratory limits * Ecology has not designated a cleanup level for this constituent PQL = Practical Quantification Limit Bold indicates the detected concentration exceeds Ecology MTCA Method A cleanup level Former SeaTac Motors/Shell Oil Groundwater Results Associated Environmental Group, LLC Table 4 Summary of Groundwater Elevation Former SeaTac Motors/Shell Oil Tukwila, WA Well Number/ TOC Elevation (feet) Date of Measurement DTW (feet) DT LPH (feet) LPH (feet) GW Elevation (feet) ' Change in GW Elevation (feet) MW-1 288.26 02/16/12 4.43 -- -- 283.83 -- MW-2 286.93 02/16/12 5.01 -- -- 281.92 -- MW-3 287.52 02/16/12 4.95 -- -- 282.57 -- MW-4 288.76 02/16/12 4.70 -- -- 284.06 -- MW-5 288.90 02/16/12 5.13 -- -- 283.77 -- Notes: TOC = Top of casing elevation relative to assigned benchmark. DTW = Depth to water below top of casing. DT LPH = Depth to liquid phase hydrocarbons LPH = Liquid phase hydrocarbons thickness. GW Elevation = Groundwater Elevation = Not measured, not available, or not applicable Former SeaTac Motors/Shell Oil Groundwater Elevations Associated Environmental Group, LLC Table 5 Summary of Water Quality Indicator Parameters Former SeaTac Motors/Shell Oil Tukwila, WA Well Number Date Collected Temp (°C) Conductivity (mS/cm) TDS (g/L) Salinity (%) Dissolved Oxygen (mg/L) pH ORP MW-1 2/16/2012 11.82 4.016 2.610 2.14 1.14 10.27 -73.2 MW-2 2/16/2012 11.72 0.550 0.353 0.27 1.00 7.01 -13.8 MW-3 2/16/2012 11.62 0.521 0.339 0.25 1.04 6.16 -58.3 MW-4 2/16/2012 11.47 0.274 0.178 0.13 0.66 6.42 -21.2 MW-5 2/16/2012 11.81 0.413 0.269 0.20 0.92 5.59 22.0 Notes: TDS = total dissolved solids = Not measured, not available, or not applicable Former SeaTac Motors/Shell Oil Field Parameters Associated Environmental Group, LLC APPENDIX A SITE PHOTOGRAPHS ASSOCIATED ENVIRONMENTAL GROUP, LLC Project No.: 10-110 Photo #1: Photo #3: Photo #5: SITE PHOTOGRAPHIC RECORD Project Name: Former SeaTac Motors, Tukwila, WA — Interim RA Removal of overburden concrete pad above the excavation area Northwest corner of excavation. Soil discoloration (petroleum contaminated soil) at a..roximatel 5.5 feet b • s. Extent of excavation towards the west. Groundwater seepage shown at left side of .hotogra.h Excavation and loading of soil for transport to an offsite soil treatment facility Extent and depth of excavation towards the east. Looking at the northeast comer of excavation Incorporating Oxygen Releasing Compound (ORC) powder to the backfill material in the northwest corner of the excavation 1018 Capitol Way S., Suite 201 •Olympia, WA • 98501 Phone: 360-352-9835 • Fax: 360-352-8164 • Email: admin@aegwa.com ASSOCIATED ENVIRONMENTAL GROUP, LLC Project No.: 10-110 Photo #7: Photo #9: SITE PHOTOGRAPHIC RECORD Incorporation/mixing of ORC powder with backfill material in the southwest corner of the excavation. Photo lookin• south ORC with backfill material mixed to an approximate depth of 7 feet in the excavation. Photo looking east Project Name: Former SeaTac Motors, Tukwila, WA — Interim RA Photo #11: eL t fr777 • 000 tog. View of Site, looking north-northeast. Note the extent of excavation exhibited by lighter colored soil before surface being repaved. Photo #8: Photo #10: Material utilized to backfill the excavation. Photo looking south Compaction of backfill material in the excavation conducted at approximately every three foot lift o soil. Photo looking northeast Repaved surface over the excavation area. Photo looking west 1018 Capitol Way S., Suite 201 •Olympia, WA • 98501 Phone: 360-352-9835 • Fax: 360-352-8164 • Email: admin@aegwa.com ASSOCIATED ENVIRONMENTAL GROUP, LLC Project No.: 10-110 Photo #1: SITE PHOTOGRAPHIC RECORD Project Name: Former SeaTac Motors, Tukwila, WA — Supplemental RI View of hollow stem auger drilling at boring MW-1. View looking to the south. View of monitoring well construction activity: installing 2-inch PVC screen into borehole at MW-1. View of steam cleaning drilling augers in between borehole. View of subsurface investigation at MW-1, looking to the north. View of backfilling the borehole annulus at MW-1 with pre -sieved Colorado silica sand. 'art" • a-•• Photo #6: 91114 View of subsurface investigation at boring MW-2, near western entrance of Site. 1018 Capitol Way S., Suite 201 • Olympia, WA • 98501 Phone: 360-352-9835 • Fax: 360-352-8164 • Email: admin@aegwa.com ASSOCIATED ENVIRONMENTAL GROUP, LLC Project No.: 10-110 Photo #9: SITE PHOTOGRAPHIC RECORD Project Name: Former SeaTac Motors, Tukwila, WA — Supplemental RI Close up view of hollow stem auger drilling at boring MW-2. Hotel adjacent north of Site is in the background. View of subsurface investigation at boring MW-3, near the central -west property boundary. Photo #11: View of subsurface investigation at boring MW-4, on the east side of Site — area of former fuel under •round stora • e tanks. View of Site, looking to the north, with drilling rig at MW-2. Note the demarcation of new asphalt surface for area of previous soil excavation. Close up view of hollow stem auger drilling at boring MW-3. Photo #12: View of subsurface investigation at boring MW-5, in the southern area of Site. View lookin: west. 1018 Capitol Way S., Suite 201 •Olympia, WA • 98501 Phone: 360-352-9835 • Fax: 360-352-8164 • Email: admin@aegwa.com APPENDIX B SUPPORTING DOCUMENTS PETROLEUM CONTAMINATED SOIL DISPOSAL MANIFEST Customer Summary Report Criteria: 09/15/2011 12:00 AM to 09/30/2011 11:59 PM Business Unit Name: AK St Reload and Recycle Facility - S07325 (USA) Customer Name: ASSOCIATED ENVIRONMENTAL GROUP LLC (ASSOCITATED ENVIRONMENTAL GROUP LL) Profile: 105519WA k a - cket, ! s£Got .. `htt JnD Cus3amter 4w: Gerierat oS! :: 7riick t tons ; t Iota 9/27/2011 32800 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 13.56 $616.98 9/27/2011 32801 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 14.34 $652.47 9/27/2011 32803 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL DTO2SOLO 14.52 $660.66 9/27/2011 32804 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS25 15.14 $688.87 9/27/2011 32805 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA-FORMERSEATAC MOTORS SHELL KS3S 15.51 $705.70 9/27/2011 32806 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL DTO2SOLO 13.7 $623.35 9/27/2011 32807 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 15.36 $698.88 9/27/2011 32808 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 17.05 $775.79 9/27/2011 32810 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL DTO2SOLO 14.8 $673.40 9/27/2011 32811 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 16.16 $735.28 9/27/2011 32812 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 18.79 $854.95 9/27/2011 32813 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA-FORMERSEATAC MOTORS SHELL DTO2SOLO 14.14 $643.37 9/27/2011 32814 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 15.95 $725.74 9/27/2011 32815 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 17.73 $806.72 9/27/2011 32816 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA-FORMERSEATAC MOTORS SHELL DTO2SOLO 14.5 $659.75 9/27/2011 32817 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 15.01 $682.95 9/27/2011 32818 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 16.93 $770.32 9/28/2011 32821 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 15.69 $713.90 9/28/2011 32822 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL DTO2SOLO 17.01 $773.95 9/28/2011 32825 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA-FORMERSEATAC MOTORS SHELL M769S 15.06 $685.23 9/28/2011 32826 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 16.2 $737.10 9/28/2011 32827 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA-FORMERSEATAC MOTORS SHELL KS3S 17.73 $806.72 9/28/2011 32829 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORM ERSEATACMOTORSSHELL DTO2SOLO 15.84 $720.72 9/28/2011 32831 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL M769S 16.32 $742.56 9/28/2011 32833 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 16.4 $746.20 9/28/2011 32834 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 15.82 $719.81 OCT 117011 AEG 9/28/2011 32837 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA-FORMERSEATAC MOTORS SHELL DTO2SOLO 17.26 $785.33 9/28/2011 32840 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL M769S 17.25 $784.89 9/28/2011 32842 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 15.74 $716.17 9/28/2011 32843 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 15.83 $720.27 9/28/2011 32845 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL DTO2SOLO 15.99 $727.55 9/28/2011 32846 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL M7695 16.74 $761.67 9/28/2011 32848 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 15.77 $717.53 9/28/2011 32849 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 17.46 $794.43 9/28/2011 32851 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL DTO2SOLO 18.21 $828.55 9/28/2011 32854 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL M769S 17.12 $778.96 9/28/2011 32855 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 15.55 $707.54 9/28/2011 32857 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 18.41 $837.65 9/28/2011 32860 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL DTO2SOLO 16.45 $748.49 9/28/2011 32861 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP IL WA -FORMER SEA TAC MOTORS SHELL M769S 15.23 $692.97 9/28/2011 32862 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA-FORMERSEATAC MOTORS SHELL MS2S 15.42 $701.61 9/28/2011 32863 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 15.97 $726.63 9/28/2011 32864 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL DTO2SOLO 17.47 $794.88 9/28/2011 32865 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL M769S 15.54 $707.07 9/28/2011 32866 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 15.97 $726.63 9/28/2011 32868 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 18 $819.00 9/28/2011 32869 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL M769S 17.37 $790.33 9/29/2011 32871 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 16.31 $742.10 9/29/2011 32872 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL DTO2SOLO 13.51 $614.70 9/29/2011 32873 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 15.73 $715.72 9/29/2011 32874 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 16.45 $748.49 9/29/2011 32875 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL DTO2SOLO 16.2 $737.10 9/29/2011 32876 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 15.88 $722.54 9/29/2011 32877 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 19.46 $885.43 9/29/2011 32879 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 17.25 $784.89 9/29/2011 32880 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 16 $728.00 9/29/2011 32882 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA-FORMERSEATAC MOTORS SHELL MS2S 14.68 $667.94 9/29/2011 32883 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 16.06 $730.73 9/29/2011 32887 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 15.76 $717.08 9/29/2011 32889 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL KS3S 15.07 $685.68 9/29/2011 32894 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEA TAC MOTORS SHELL MS2S 17.95 $816.74 9/22/2011 32761 234 99933383004 ASSOCITATED ENVIRONMENTAL GROUP LL WA -FORMER SEATAC MOTORS SHELL NONE 0 $75.00 Customer Total 62 984.32 $44,861.66 62 •Batt! 0 •Tons a;Total TicketAmouii. • 984.32 $44,861.66 RECEIVED OCT 1 17011 AEG Untitled Page Page 1 of 1 AK St Reload and Recycle Facility Reprint Ticket # 32761 7901 1st Avenue South, Reprint Web Ticket # 299 Seattle, WA, 98108-4201 Ph: (206) 763-5025 Carrier NONE No Carrier Vehicle# NONE Volume Customer Name ASSOCIATED ENVIRONMENTAL Billing# 0000234 Ticket Date 09/22/2011 Grid Payment Type Credit Account Manual Ticket# PO# Profile 105519WA(PCS) Generator 988875(WA-FORMER SEA TAC MOTORS SHELL) Time Scale Operator Inbound Gross 0 lb* In 09/22/11 02:09:00 MANUAL WT DMarler Tare 0 Ib* Out 09/22/11 02:09:00 MANUAL WT DMarler Net 0 Ib * Manual Weight Tons 0 Comments profile fee for 105519wa Void Reason Surcharges Qty UOM Rate Fee Amount PROFILEF75-Profile Fee $75 1 Each 75.00 $75.00 Total Fees Total Ticket $75.00 http://fastlane.wm.com/Reports/ClientTicketReport.aspx?facidu=S07325&wtTicketlD=28... 10/3/2011 BORING LOGS ASSOCIATED ENVIRONMENTAL GROUP, LLC LOG OF BOREHOLE PROJECT: Former SeaTac Motors - Suppl RI JOB #: 10-110 BORING # MW-1 PAGE 1 OF 1 Location: 14120 Tukwila International Blvd, Tukwila, WA Approximate Elevation: Subcontractor/Equipment: Western States Soil Conservation - Adonis Pablo Drilling Method: Hollow Stem Auger Date: 2/6/2012 Logged By: Y. Van Depth (ft) Soil Description Unified Soil Symbol aw ma ~ o.> o co C a: Sample Number E H Blows/Foot PID Reading Sheen Monitoring Well Asphalt surface, 2 inches, underlain by Gravel backfill (pit run). At 6 feet becomes moist to wet. Saturated fill soil intermittent with silty clay. Brown, most, stiff, Silty CLAY. Slight petroleum fuel odor. GW CL --------' _ ________ MW1-S1-10.5/11.5 0930 0949 1018 4/4/4 at 19 feet: 61.2 Not':...—.. observed served Obd Not observed i ♦ ... • :': ': •'•' ,_, I I;:::: ♦*. .44 • 5 10 1.-- ------ 15 20 TD at 20 feet bgs. Groundwater encountered at approximately 6 feet bgs ATD. Boring completed as Monitoring Well MW-1. Well Schematics: 0.020 inch slot screen: 5 feet to 20 feet. Colorado Silica Sand, 10 x 20: 3 feet to 20 feet. Bentonite chips: 1 feet to 3 feet. Cement grout: 1/2 feet to 1 feet. Ecology Well Tag No. BCM-218. ________ ________ , - 25 Explanation Monitoring Well = 2-inch O.D. split spoon sample Clean Sand ® No Recovery ggi Bentonite - - - - Contact located approximately NM Grout/Concrete II Groundwater level at time of drilling Screened Casing or date of measurement I 1 Blank Casing ASSOCIATED ENVIRONMENTAL GROUP, LLC LOG OF BOREHOLE PROJECT: Former SeaTac Motors - Suppl RI JOB #: 10-110 BORING # MW-2 PAGE 1 OF 1 Location: 14120 Tukwila International Blvd, Tukwila, WA Approximate Elevation: Subcontractor/Equipment: Western States Soil Conservation - Adonis Pablo Drilling Method: Hollow Stem Auger Date: 2/6/2012 Logged By: Y. Van Depth (ft) Soil Description Unified Soil Symbol at a w E >. to I- rn Sample Recovery Sample Number E i- Blows/Foot PID Reading Sheen Monitoring Well Asphalt surface, 2 inches, underlain by Brown, moist, medium dense, Poorly Graded SAND, well sorted, coarse grained sand. (FILL) Brown, moist to wet (at 5 feet), medium stiff, silty CLAY. No petroleum fuel odor. At 11 feet becomes indurated. Gray, dry, hard, silty SAND with gravel, well indurated (TILL). No petroleum fuel odor. Slow drilling - hard till. SP CL TILL -------- 111111 _. I MW2-S1-5.5/6.5 MW2-S2-10.5/11.5 MW2-S3-15.5/16.5 MW2-S4-20.5/21.5 1328 1350 1402 1420 1450 1/3/4 5/9/22 25/50 for 4" 18/24/34 0.0 0.0 0.0 0.0 Not Observed Not observed Not Observed Not Observed I •� ',•':'.j,� ice=: {{{{{{ •;;.:;. ...—i- ;=::';:' • :',''•.':;,:;, :::.f�•j;; I .. •r• —' .4 • 5 15 -------- • 20 TD at 21-1/2 feet bgs. Groundwater encountered at approximately 5 feet bgs ATD. Boring completed as Monitoring Well MW-2. Well Schematics: 0.020 inch slot screen: 5 feet to 20 feet. Colorado Silica Sand, 10 x 20: 3 feet to 20 feet. Bentonite chips: 1 feet to 3 feet. Cement grout: 1/2 feet to 1 feet. Frolnav Well Tan No BCM-219 -------- — 25 Explanation Monitoring Well I2-inch O.D. split spoon sample :::: Clean Sand ® No Recovery baL Bentonite -'-'-•• Contact located approximately Grout/Concrete Groundwater level at time of drilling =Screened Casing or date of measurement I I Blank Casing ASSOCIATED ENVIRONMENTAL GROUP, LLC LOG OF BOREHOLE PROJECT: Former SeaTac Motors - Suppl RI JOB #: 10-110 BORING # MW-3 PAGE 1 OF 1 Location: 14120 Tukwila International Blvd, Tukwila, WA Approximate Elevation: Subcontractor/Equipment: Western States Soil Conservation - Adonis Pablo Drilling Method: Hollow Stem Auger Date: 2/6/2012 Logged By: Y. Van Depth (ft) Soil Description Unified Soil Symbol as co o 1— Sample Recovery Sample Number tv E 1- c u. in o m [PID Reading Sheen Monitoring Well Asphalt surface, 2 inches, underlain by Gray -olive green, moist, medium stiff, silty CLAY with local roots. At 6 feet: slight petroleum fuel odor. At 10 feet: becomes moist to wet. Gray, moist to wet, very dense SAND with gravel, coarse grained sand, small to medium size gravel, angular to subangular. Gray, moist, very dense, silty SAND with gravel, well indurated, small size gravel. At 15-1/2 feet: no petroleum fuel odor. At 20-1/2 feet to 21-1/2 feet: no petroleum fuel odor. CL SW SM • — T T MW3-S1-5.5/6.5 MW3-S2-10.5/11.5 MW3-S3-16.0/16.5 MW2-S420.5/21.5 1110 1116 1129 1140 1156 1/3/4 5/18/45 37/50 for 5" 19/50 for 5" 6.4 10.6 9.5 4.6 Not observed Not Observed Not Observed I •��� Oi t;:::: :?--r;:.':s. :,:%; I 4 OE. : •: 5 10 _ 15 _ ----- TD at 21-1/2 feet bgs. Groundwater encountered at approximately 10 feet bgs ATD. Boring completed as Monitoring Well MW-3. Well Schematics: 0.020 inch slot screen: 5 feet to 20 feet. Colorado Silica Sand, 10 x 20: 3 feet to 20 feet. Bentonite chips: 1 feet to 3 feet. Cement grout: 1/2 feet to 1 feet. Fcnlnnv Well Tao No RCM-220 ---- ----• ' 25 Explanation Monitoring Well I2-inch O.D. split spoon sample Clean Sand ® No Recovery = Bentonite -'-'-" Contact located approximately Grout/Concrete V Groundwater level at time of drilling Screened Casing or date of measurement I i Blank Casing ASSOCIATED ENVIRONMENTAL GROUP, LLC LOG OF BOREHOLE PROJECT: Former SeaTac Motors - Suppl RI JOB #: 10-110 BORING # MW-4 PAGE 1 OF 1 Location: 14120 Tukwila International Blvd, Tukwila, WA Approximate Elevation: Subcontractor/Equipment: Western States Soil Conservation - Adonis Pablo Drilling Method: Hollow Stem Auger Date: 2/7/2012 Logged By: L. Chaidez Depth (ft) Soil Description Unified Soil Symbol 11) O. S. iv N 1- Sample Recovery Sample Number 0 E ~ c u_ n o m PID Reading Sheen Monitoring Well Asphalt surface, 2 inches, underlain by Brown, moist, medium dense, silty SAND; fine grained, with fine to medium gravel. Brown, moist, medium dense, SAND, fine grained. Brown, wet, medium dense, silty SAND, fine grained. Greenish -gray, moist, stiff, sandy SILT; fine grained sand, trace of clay. Strong petroleum fuel odor. At 13 feet: sandy SILT with clay. Increasing sand content. Gray, wet, very dense, silty SAND, fine grained, trace fine gravel. No petroleum fuel odor. Gray, moist, hard, SILT, some fine grained sand, trace coarse gravel. SM SP = T I MW4-S1-11.0/11.5 MW4-S2-20.0/21.5 1013 1025 1048 3/3/3 10/25/30 133 0.0 Not Observed Not observed 0"4 AA :': I --a.; 5 SM ML SM - _ ML 10 • - — — 15 20 - TD at 21-1/2 feet bgs. Groundwater encountered at approximately 7 feet bgs ATD. Boring completed as Monitoring Well MW-3. Well Schematics: 0.020 inch slot screen: 5 feet to 20 feet. Colorado Silica Sand, 10 x 20: 3 feet to 20 feet. Bentonite chips: 1 feet to 3 feet. Cement grout: 1/2 feet to 1 feet. Fnninnv Well Tan Nn BCM-221 • • . 25 Explanation Monitoring Well 2-inch O.D. split spoon sample t::.1 Clean Sand ® No Recovery Bentonite III -- - Contact located approximately Grout/Concrete Groundwater level at time of drilling Screened Casing or date of measurement 1 I Blank Casing ASSOCIATED ENVIRONMENTAL GROUP, LLC LOG OF BOREHOLE PROJECT: Former SeaTac Motors - Suppl RI JOB #: 10-110 BORING # MW-5 PAGE 1 OF 1 Location: 14120 Tukwila International Blvd, Tukwila, WA Approximate Elevation: Subcontractor/Equipment: Western States Soil Conservation - Adonis Pablo Drilling Method: Hollow Stem Auger Date: 2/7/2012 Logged By: L. Chaidez E t o d 0 Soil Description Unified Soil Symbol Sample Type Sample Recovery Sample Number d E I— Blows/Foot PID Reading L.Sheen Monitoring Well Asphalt surface, 2 inches, underlain by; Brown, moist, medium dense, SAND, well sorted, fine grained. SW ML ML SW - ML ML sp - T � MW5-S1-6.0/6.5 MW5-S2-10.5/11.5 MW5-S3-15.0/16.5 MW5-S4-20.0/21.5 0807 0817 0824 0833 0851 6/1/1 3/4/6 9/12/13 16/25/36 3.2 0.0 0.0 0.0 Not Observed Not Observed I +4, ::':': I ulr. • 5 Greenish -gray, moist, stiff, SILT, some clay, trace fine grained sand. At 6 feet: dark brown. At 10 feet:.greenish.gray, moist stiff,_._._._.__._._._,_,_,_,_,_._,_,_,_,_ Greenish gray, wet, stiff, sandy SILT; fine grained sand, trace of clay. _ 10 • 15 • -------• Gray, wet, dense SAND, fine grained, poorlysorted, trace fine gravel. Gray, wet, very stiff, SILT, trace of fine grained sand. 20 Gray, wet, hard, sandy SILT with fine grained sand. At 21 feet: moist. Gray, moist, very dense SAND, -fine gained:Mace silt. ------ TD at 21-1/2 feet bgs. Groundwater encountered at approximately 7 feet bgs ATD. Boring completed as Monitoring Well MW-5. Well Schematics: 0.020 inch slot screen: 5 feet to 20 feet. Colorado Silica Sand, 10 x 20: 3 feet to 20 feet. Bentonite chips: 1 feet to 3 feet. Cement grout: 1/2 feet to 1 feet. Ecolnav Well Taa No BCM-222 • • . — — 25 Explanation Monitoring Well 2-inch O.D. split spoon sample E Clean Sand ® No Recovery IgM Bentonite - - - Contact located approximately Grout/Concrete V. Groundwater level at time of drilling Screened Casing or date of measurement I Blank Casing PROFESSIONAL SURVEYOR SITE EXHIBIT VERTICAL DATUM: THE VERTICAL DATUM FOR THIS SURVEY IS NAVD 88, BASED ON PUBLISHED ELEVATIONS FOR WSDOT MONUMENT ID 6423 (DESIGNATION 1517199) AND WSDOT MONUMENT ID 5273 (DESIGNATION IS17162) MONUMENT ID 6423 ELEVATION: 268.261 FEET MONUMENT ID 5273 ELEVATION: 159.360 FEET HORIZONTAL DATUM: THE HORIZONTAL DATUM FOR THIS SURVEY IS NAD 83/91, WASHINGTON STATE PLANE, NORTH ZONE, BASED ON PUBLISHED COORDINATES FOR WSDOT MONUMENT ID 6423 (DESIGNATION 1517199) AND WSDOT MONUMENT ID 5273 (DESIGNATION IS17162) LEGEND: TEMPORARY BENCHMARK MONITORING WELL PACIFIC GEOMATIC SERVICES, INC. LAND SURVEYING & MAPPING SERVICES QUALITY SERVICE - CREATIVE SOLUTIONS 6608 216TH STREET SW, STE. 304 MOUNTLAKE TERRACE, WA 98043 PHONE:(425) 778-5620 FAX:(425) 775-2849 WEB: www.PacGeolnc.com JOB NAME: SEATAC MOTORS LOCATION: 14120 TUKWILA INTERNATIONAL BLVD TUKWILA, WASHINGTON KING COUNTY DESCRIPTION: MONITORING WELL EXHIBIT MAP DRAWN BY: MRN CHECKED BY: KDB SCALE: 1" = 30' DATE: 3/13/2012 JOB NUMBER SHEET 12-010-01 1 OF 2 TBM 101 TBM 102 BUILDING APN 1523049123 ASPHALT PARKING LOT 1523049242 p,PN BUILDING 59-3p4p335 PPN TBM 103 x PPN 151304g219 NORTH GRAPHIC SCALE 0 15 30 60 ( IN FEET ) 1 inch = 30 ft MONITOR WELL COORDINATE TABLE: MONITORING WELL NORTHING EASTING NORTH RIM PVC ELEVATION NORTH RIM CASING ELEVATION MW-1 177081.7 1281890.6 288.26 288.61 M W— 2 177133.5 1281850.3 286.93 287.33 M W— 3 177073.1 1281847.1 287.52 287.98 MW-4 177049.9 1281931.8 288.76 289.24 MW-5 177025.0 1281877.6 288.90 289.26 PGS CONTROL COORDINATE TABLE: TBM 101 177134.04 1281846.84 ELEV = 287.03 MAG NAIL & WASHER TBM 102 177043.60 1281857.39 ELEV = 288.56 MAG NAIL & WASHER TBM 103 177020.05 1281949.29 ELEV = 289.54 MAG NAIL & WASHER DRAWN BY: MRN CHECKED BY: KDB SCALE: 1" = 30' DATE: 3/13/2012 JOB NUMBER SHEET 12-010-01 2 OF 2 JOB NAME: SEATAC MOTORS LOCATION: 14120 TUKWILA INTERNATIONAL BLVD TUKWILA, WASHINGTON KING COUNTY DESCRIPTION: MONITORING WELL EXHIBIT MAP SURVEYOR'S NOTE: THE PURPOSE OF THIS SURVEY IS TO SHOW THE HORIZONTAL LOCATION AND ELEVATION OF 5 MONITORING WELLS ON THE SUBJECT PROPERTY ALONG WITH GENERAL EXISTING IMPROVEMENTS. PROPERTY LINES SHOWN ON SHEET 1 OF 2 OF THIS SURVEY ARE BASED ON PUBLISHED SURVEY INFORMATION AND KING COUNTY GIS DATA. THIS SURVEY DOES NOT CONSTITUTE A BOUNDARY RETRACEMENT BY PGS, INC. AND THE PROPERTY LINES HEREON ARE SHOWN FOR GRAPHICAL REFERENCE ONLY. PACIFIC GEOMATIC SERVICES, INC. LAND SURVEYING & MAPPING SERVICES QUALITY SERVICE - CREATIVE SOLUTIONS 6608 216TH STREET SW, STE. 304 MOUNTLAKE TERRACE, WA 98043 PHONE:(425) 778-5620 FAX:(425) 775-2849 WEB: www.PacGeolnc.com LABORATORY ANALYTICAL RESULTS Libby Environmental, lnc. Chain.of 4139 Libby Road NE Ph: 360-352-2110 Olympia, WA 98506 Fax: 360-352-4154 Client: Custody Date: Project Manager: Vb Project Name:A Location: Collector: Record 11A-1-1 t\ Page: ( of 6 4.tLltZ t,q,t2.A S / . vA -r.4 Address: lots C,Ar ft'&A, ......> 61 .r. .4 lot , DUtstp LA i.J4- 'G4c• r'1sc"UF.S Phone: 360-1Yl-- Dime"Fax: —8L6 Le `ctss INJtc lt.d- 1v4-1"1- 8 J —*air-0LL.4-. WA- Client Project # • 10--11 O ly , v.40l 0--L., CArir►A L X> tris Date of Collection: °l, l II -At Sample Number Depth Time Sample Type Container Type • xN 0 � tble GAO +• + +(l' nO ti \y � � Pcb eta Q 44Q Q Q �� 0y ot. JO JO JO co �Os QG �� Field Note/# Containers 1 eXi• w- 13.c 13 de ii,of SkItt- IASeti x X 3 2 3 4 5 6 • ' 8 9 10 11 12 13 14 15 16 17 18 Relinquished by: Date / Time Received by Date / Time 1t-9..� Q '(/9,1 t ‘ 1} :c�. ZI-- q-Z7 -f( Y r S,t Sample Receipt: Remarks: filohrs C44. Y -J taJ 340-Stri - 2$Lo TAT AR) 4BHR 5-Day Relinquished by: Date / Time Receive y Date / Time Good Condition? Cold? Relinquished by: Date / Time Received by Date / Time Seals Intact? Total Number of Containers Distribution White - Lab. Yellow - File, Pink - Originator LIBBY ENVIRONMENTAL CHEMISTRY LABORATORY SEATAC MOTORS PROJECT Tukwila, Washingtor AEG, LLC Client Project # 10-11C Libby Project No. L110927-14 Analyses of Gasoline (NWTPH-Gx) & BTEX (EPA Method 8021B) in Soil Sample Number Method Blank LCS EX1-W-13.5 L110927-10 MS Date Analyzed 9/27/11 9/27/11 9/27/11 9/27/11 Practical Quantitation Limi Benzene (mg/kg) nd 74% nd 82% Toluene (mg/kg) nd 72% nd int Ethylbenzenc (mg/kg) nd Xylenes Gasoline (mg/kg) (mg/kg) nd nd 0.66 0.31 20 0.02 0.10 0.05 0.15 10 Surrogate Recovery (%) 123 129 129 119 "nd" Indicates not detected at the listed detection limit: "int" Indicates that interference prevents determinatioi ACCEPTABLE RECOVERY LIMITS FOR SURROGATE (Trifluorotoluene): 65% TO 135°/ ANALYSES PERFORMED BY: Sherry Chilcur Page 1 of 1 Libby Environmental, Inc. Chain 4139 Libby Road NE Ph: 360-352-2110 Olympia, WA 98506 Fax: 360-352-4154 Client: of Custody Date: Project Manager: Project Name: k' Location: Collector: Record i -1 , Page: of ; , Address: t. , ,, ,* Phone: , Fax: - Client Project # - ,, , ‘,- .' - , .::„ , ,., ,, Date of Collection: Sample Number Depth Time Sample Type Container Type 0 0 'brt' ' * • 6 ;-• - : : , . .. , ,,,,,,, . . .. 8 9 10 . 11 12 13 14 15 16 17 'rn- 18 - Relinquished by: Date / Time Received by Date / Time "-- 1 , -;' '•-• ,(7 ' LI, Sample Receipt: Remarks: '. . ' . TAT 24HR • 48HR 5-Day Relinquished by: Date / Time Received by Date / Time Good Condition? Cold? Relinquished by: Date / Time Received by Date / Time Seals Intact? Total [lumber of Containers Distribution White - Lab, Yellow - File, Pink - Originator LIBBY ENVIRONMENTAL CHEMISTRY LABORATORY FORMER SEATAC MOTOR PROJECT Tukwila, Washington AEG, Inc. Client Project #10-110 Libby Project No.L110928-14 Analyses of Gasoline (NWTPH-Gx) & BTEX (EPA Method 8021B) in Soil Sample Date Benzene Toluene Ethylbenzene Xylenes Gasoline Number Analyzed (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) Method Blank 9/28/11 nd nd nd nd nd LCS 9/28/11 70% 92% ST 1 9/28/11 nd nd nd nd nd ST 2 9/28/11 nd nd nd nd nd B-NE-15.0 9/28/11 0.11 0.16 0.67 0.83 13.8 r,/'S-NE-15.5 9/28/11 nd nd nd nd nd B-N-14.5 9/28/11 0.049 0.05 0.047 0.101 nd B-SW-12.5 9/28/11 0.066 nd 0.11 0.077 nd c..-•S-SW-6.0 9/28/11 0.031 nd nd nd nd L110928-30 MS 9/28/11 88% 114% Practical Quantitation Limit 0.02 0.10 0.05 0.15 10 "nd" Indicates not detected at the listed detection limits. "int" Indicates that interference prevents determination. ACCEPTABLE RECOVERY LIMITS FOR SURROGATE (Trifluorotoluene): 65% TO 135% ANALYSES PERFORMED BY: Jamie Hart Libby Environmental, Inc. Chain of Custody 4139 Libby Road NE Ph: 360-352-2110 Olympia, WA 98506 Fax: 360-352-4154 Date: q I v`i9 Record I i 1 Page: ' of l Client: Project Manager: -PJ ' Address: hi $ QAPO'L wlc V l 2_4r` Project Name: �a T Phone: (.t) 5-6a-_ et t 55Fax: Location: )'-+ 10 "(V KWLL1t t 15 LJ,D City: -ro kw tL Client Project # (0— 1('O Collector:LE'O Cw4Alma. Date of Collection: q a -I II . Depth Time Sample Type Container Type G + + + rLgeNv� P�ryQ ,�P,,qa � ��Q�O�o szr ,,, yt b , JO JO JO 5� ? + + + QP QG �� Field Notes Sample in a lit. Number 1 5 -w KJ - (1. Si it (•6 12 : 4O sOt L 140 m11-1 V v 3 eor.riitti►.st&zS 213- N W - 1Z' 12.0 1215g V' ✓ 3 6- OM- 1.0.5' tO•5' is:2D ✓ ✓ 415-1).) --11.5 11.5' 13:3g ,/ ✓ 5 -t5-W -- 1 A -5' 1.51 1'F:1 b ✓ ✓ , 6 .6 - 5�% -- IZ' 12.0 1'i'r.2+ '� ✓ 7 '�— — 12.5' I9i.5 j'+'5ie �' ✓ . 8 -- ►.t - 11.'5 11. 5 19. 45 ✓ ✓ 9 5- N- t I (1.0 i S 5 5 v/ .1 V V 10 11 12 13 14 15 16 17 18 Relinquished by: Date �t--cam--w ~ g1a1 /Time "eceived by: Date / Time I1r Co: ,- , ; yC1A� /'i h u Sample Receipt Remarks: 1� � A T Relinquished b : Date / Titfte • eceived by: Date I Tlme� q y Good Condition? Cold? Relinquished by: Date / Time Received by: Date / Time Seals Intact? Total Number of Containers Distribution: White - Lab, Yellow - File, Plnk - Originator LIBBY ENVIRONMENTAL CHEMISTRY LABORATORY FORMER SEATAC MOTOR PROJECT Tukwilla, Washington AEG, LLC Client Project # 10-110 Libby Project No. L110929-8 Analyses of Gasoline (NWTPH-Gx) & BTEX (EPA Method 8021B) in Soil Sample Number Method Blank LCS S-WN-11.5' S-WN-11.5' Dup B-NW-12' S-WM-10.5' B-W-11.5' B-SW-12.5' S-SW-12' B-S-12.5' B-N-11.5' S-N-11' L110929-9 MS Date Benzene Toluene Ethylbenzene Analyzed (mg/kg) (mg/kg) (mg/kg) 9/29/11 nd nd nd 9/29/11 77% 126% 9/29/11 0.063 0.076 0.30 9/29/11 0.088 0.079 0.31 9/29/11 nd nd nd 9/29/11 0.60 0.52 2.02 9/29/11 0.16 nd nd 9/29/11 0.054 nd 0.10 9/29/11 1.06 1.21 5.07 9/29/11 nd nd nd 9/29/11 0.15 0.12 1.56 9/29/11 nd nd nd 9/29/11 81% 84% Practical Quantitation Limit 0.02 0.10 0.05 Xylenes Gasoline Surrogate (mg/kg) nd (mg/kg) nd 0.35 nd 0.19 nd nd nd 1.49 92 0.53 25 0.13 nd 9.77 272 nd nd 0.98 nd nd nd 0.15 10 Recovery (%) 88 97 105 107 84 109 101 103 66 77 75 102 98 "nd" Indicates not detected at the listed detection limits. "int" Indicates that interference prevents determination. ACCEPTABLE RECOVERY LIMITS FOR SURROGATE (Trifluorotoluene): 65% TO 135% ANALYSES PERFORMED BY: Jamie Hart Page 1 of 1 Libby Environmental, Inc. Chain 4139 Libby Road NE Ph: 360-352-2110 Olympia, WA 98506 Fax: 360-352-4154 Client: tZ$O of Custody Date: j Project Manager: Project Name: Location: Collector: Record ..2./411z Page: \ of 1 ►41to t lit Y .. vQ td Address: t 0 IS G4lt-E..t. 4, 1 .C'. a€�20L" Out sffri) Oft -p, d Eirrip. tt1P' lcS surt4 (.r Phone: 360~ 3Sz- .83( Fax: .--81,Ctf tUl 'IIKf1L Q+-+AIti Tuk4stLA? kit* Client Project # t,O ^JUN 't.var,.t j- L. ctrk"'Del Date of Collection: IA- zJ Of It I. Sample Number Depth Time Type Container Type �.a ,�0 $. © :::C; 0+ O+ 04 O pa, e`a�5Sample ����O�y.�Q��Q ��Q�,��O� �� P`'� -4 J J c (e- 9C) 4� Field Note/# Containers 1 M,.,13-52- 10.57%, ei* 112.`'i 4" IV ��'dWAr X GN4 (3) 23-J4-?s, j1►S`us`.f 41.r- J-o,I- 3Hv-IL-S2.—Iio. 1it.S 1 t; 1%412- ro`L 6) 4 tu-3L-s t -- . 21,5 r+ d. t ., A K. 0 ) 5McS-5!/(ca`=6.5' G-4.5 g:/7 I- r 6 MIJ.`l-SZ//O.s-!/.$/O,S-116, 2 ,' 7t- 1J 7 410 y - s///l -/1.5 II 1/.5_lo; a5 •k- lc 8 MIJ,/ "z12a-2/.$ Zt! ZJ.S /O;`f* 4 t f i• Nrc 4 9 10 11 12 13 14 15 16 - 17 18 Relinquished by: Date / Time Received by Date / Time y Sample Receipt: Reen TAT arks: Relinquished by: Date Time Re ed by Date / Time Good Condition? Cold? Relinquished by: Date / Time Received by Date / Time Seals Intact? Total Number of Containers 24HR 481-IF(' 5-Day Distribution White - lab, Yellow - File, Pink Onginator Libby Environmental, Inc. FORMER SEATAC MOTORS SUPPL SI PROJECT AEG, LLC Tukwila, Washington Libby Project # L120207-2 Client Project # 10-110 4139 Libby Road NE Olympia, WA 98506 Phone: (360) 352-2110 FAX: (360) 352-4154 Email: libbyenv@aol.com Analyses of Gasoline (NWTPH-Gx) & BTEX (EPA Method 8260C) in Soil Sample Number Method Blank LCS MW3-S2-10.5/11.5 MW3-S4-20.5/21.5 MW2-S2-10.5/11.5 MW2-S4-20.5/21.5 MW5-S 1-6/6.5 MW5-S2-10.5/11.5 MW4-S1-11/11.5 MW4-S2-20/21.5 L120203-2 MS Date Benzene Toluene Ethylbenzene Xylenes Gasoline Surrogate Analyzed (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) Recovery (%) 2/8/12 nd nd nd nd nd 95 2/8/12 98% 100% 98 2/8/12 nd nd nd nd nd 109 2/8/12 nd nd nd 0.34 nd 94 2/8/12 nd nd nd nd nd 91 2/8/12 nd nd nd nd nd 98 2/8/12 nd nd nd nd nd 100 2/8/12 nd nd nd nd nd 93 2/8/12 nd nd 2.41 1.97 1070 103 2/8/12 nd nd 0.10 0.10 45.8 98 2/8/12 106% 106% 119 Practical Quantitation Limit 0.02 0.10 0.05 0.15 10 "nd" Indicates not detected at the listed detection limits. "int" Indicates that interference prevents determination. ACCEPTABLE RECOVERY LIMITS FOR SURROGATE (Toluene-d8): 65% TO 135% ANALYSES PERFORMED BY: Sherry Chilcutt Page 1 of 1 Libby Environmental, Inc. Chain 4139 Libby Road NE Ph: 360-352-2110 Olympia, WA 98506 Fax: 360-352-4154 Client: f l( of Custody Record • Date: Q} 2 jll0 /! Z Page: ( of f e Project Manager: /l/-titl' Address: /0/g GiA-Pfr _ Lr1t9 .596?-figii D LdIMPM Project Name: F Ej2) 47 c Mbr? Phone:060) 3622,'''9,5_ Fax: Location:I'//2D fl//;tdd(d. -tisJT & Y: 17Jfrs �. t' L.. " Client Project # / f1 - jiQ Collector: l•,eO C19,4-1 t7 Date of Collection: 62' / s/7.r Depth Time Sample Type Container Type } P P P .� e Q 0� G". a0 JO JO 5Q. QP QG # Field Notes Sample Number 1 / id - ( -- ! Z; 10 k14T€R-- Vo,i V" d 2 ,v1 ,- z.- -- /; Z2= ✓ D.,3 /►? a) — 2137 ✓ ~?cif r GiisouJ,3t 4 / 44/ — y- — 3` /7 75 /VI tJ -- T; 6 7 8 9 10 11 12 13 14 15 16 17 18 Relinquished by: Date / Time Received by: /J Date / Time Lam" r 1/7( - Z-/7-f2_ Sample Receipt Rem rkg: kFivIr'rL' !r'i'7'r---F Relinquished by: Date / Time Received'by: Date / Time Good Condition? Cold? Relinquished by: Date /Time Received by: Date / Time Seals intact? Total Number of Contelners Distribution: WNW - Lab. Yellow- Fiia, Plnk- Originator Libby Environmental, Inc. FORMER SEATAC MOTORS PROJECT AEG, LLC Tukwila, Washington Libby Project # L120217-2 Client Project # 10-110 4139 Libby Road NE Olympia, WA 98506 Phone: (360) 352-2110 FAX: (360) 352-4154 Email: libbyenv@aol.com Analyses of Gasoline (NWTPH-Gx) & BTEX (EPA Method 8260C) in Water Sample Date Benzene Toluene Number Analyzed (µg/l) (µg/1) Method Blank 2/20/12 nd nd LCS 2/20/12 99% 97% MW-1 2/20/12 2.5 3.5 91.2 MW-1 Dup 2/20/12 2.7 3.6 96.9 MW-2 2/20/12 nd nd nd MW-3 2/20/12 121 21.5 69.2 MW-4 2/20/12 nd nd nd MW-5 2/20/12 nd nd nd MW-1 MS 2/20/12 106% 106% Practical Quantitation Limit 1 2 Ethylbenzene (µg/1) nd 1 Xylenes (µg/1) nd Gasoline (µg/1) nd 82.3 1240 87.1 1270 nd nd 94.7 3370 23.2 2380 nd nd 3 100 Surrogate Recovery (%) 98 97 103 103 98 101 100 100 101 "nd" Indicates not detected at the listed detection limits. "int" Indicates that interference prevents determination. ACCEPTABLE RECOVERY LIMITS FOR SURROGATE (Toluene-d8): 65% TO 135% ANALYSES PERFORMED BY: Sherry Chilcuti Page 1 of 1 /Notes:(1) The locations of all features approximate. PROJECT LOCATION (2) This drawing is for information intended to assist in showing an attached document. Reference: Drawing created from notes provided by AEG, LLC. S 142nd ST II IL ,.....___....._ r- 1 PAWN SHOP 1 1 I L---- -----I sP�F,S GpEi ,1 DRAWING SCALE: 1 "= 100' VICINITY MAP Nor ro scALE S 141st ST FORMER MOTEL SITE PROPERTY LINES (TYPICAL) I I I N-c IxcoMP coosvz ASSOCIATED ENVIRONMENTAL GROUP, LLC 1728 State Avenue NE, Suite 101 Olympia, WA 98506 (360) 352-9835 Fax (360) 352-8164 FIGURE 1 SITE & VICINITY MAP FORMER SEATAC MOTORS 14120 TUKWILA INT'L BLVD TUKWILA, WA Project# 10-110 Data: 2/25/2010 Re: BC LAND DEVELOPMENT Sheet 1 OF 2