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Home My WebLink AboutSEPA E96-0036 - BOEING - PLANT 2 SEDIMENT INTERIM MEASURESBOEING PLANT 2 SEDIMENT INTERIM MEASURES 7755 E. MARGINAL WY E96-0036 •CITY OF TUKWILA MITIGATED DETERMINATION OF NONSIGNIFICANCE (MONS) DESCRIPTION OF PROPOSAL: REMOVE PCB CONTAMINATED SOIL AT 2 LOCATIONS PROPONENT: THE BOEING COMPANY LOCATION OF PROPOSAL, INCLUDING STREET ADDRESS, IF ANY: ADDRESS: 7755 EAST MARGINAL WY S PARCEL NO: 000160-0020 SEC/TWN/RNG: 33/24/4 LEAD AGENCY: CITY OF TUKWILA FILE NO: E96-0036 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 43.21c.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. The conditions to this SEPA Determination are attached. This S is issued under 197-11-340(2). Comments must be submitted by _ The lead agency will not act on this pro osal or 5 days from the date below. Steve Lancaster, Responsible Official City of Tukwila, (206) 431-3680 6300 Southcenter Boulevard Tukwila, WA 98188 12-20-96 Date Copies of the procedures for SEPA appeals are available with the Department of Community Development. CITY TUKWILA CONDITIONS Address: 7755 EAST MARGINAL WY S Applicant: Status: PENDING Permit No: E96-0036 Applied: 12/06/1996 Type: P-SEPA Approved: Location: 33/24/4 Parcel #: 000160-0020 Zoning: M2 **•k***•***********************************•k********•k**•k•k**** k k************** 1. Compliance with all associated Federal and State permits. Please provide copies of all the permits required by other agencies or other jurisdictions prior to initiating the work. 2. Work below the ordinary high water line shall be conducted during a low tide cycle to avoid erosion and sedimentation in the River. 3. Riverbank alteration will be restored to pre-existing location without encroachment into the channel. AFFIDAVIT I ,sclogli...(4_. O Notice of Public Hearing fl Notice of Public Meeting 0 Board of Adjustment Agenda Packet fl Board of Appeals Agenda Packet fJPlanning Commission Agenda Packet fShort Subdivision Agenda Packet OF DISTRIBUTION 'hereby declare that: flDetermination of Non- significance Mitigated Determination of onsignificance Determination of Significance and Scoping Notice Notice of Action Official Notice 0 Other jJ Notice of Application for Other Shoreline Management Permit Li Shoreline Management Permit , n w wasmailed o each of the following addresses on )?/ 1()-Y V1/00 iCeA7.&(5), 12 -1 -an, 1 9 , Name of Project sc., is File Number e(3o-Le Signature • • CITY OF TUKWILA MITIGATED DETERMINATION OF NONSIGNIFICANCE (MDNS) DESCRIPTION OF PROPOSAL: REMOVE PCB CONTAMINATED SOIL AT 2 LOCATIONS PROPONENT: THE BOEING COMPANY LOCATION OF PROPOSAL, INCLUDING,STREET-ADDRESS, IF ANY: 4 * ADDRESS: 775V:WT MARGINAO WY/5\4 • PARCEL NO: 0001150-00211' SEC/TWN/RNG:033k24/4, , i? / •-7- . 1-)0C“ik7',Do. ,e47 LEAD AGENM /CITY: -OF TUkWILMV Id Q, FILE4NO: E96,0036 • •,;t. 4'3‘'A '1/4//;: •J_ 5 The City/Ms 04ermined tWthproRosal does not signifi9anit afiversel,()impac*on the)en'Vironment. An statemelpisdlot rOuired tirrOW 43.21c.0 -4.1 ,.;...4,, decision, mas410e fter revrew,iof a completed envi and ottieP information onrle wrath thelliency ttli ,P 1 pg 4 C. is avaitlable to the pub..kjc onrequ, Thg copdit Determlnation 1-4Ata.che'cL' k / P cir 0 This ,5 is/issued uhAer7 197-1i1340(2)Comments \ \\A 4ye6e'brobab,le ehvirprimentWimpact 30(2,“0 ronmenta/L-checkdist This"imformation ions to th,i's SEPA 0 Y , • ,? 0 ,i a . mustbe;submitted by . The -Lead avacy WiAl not ra“, onithtSia . N , pro o;'Wsi 5d a t oW o — days from the I (t , Steve Lancaster,tRespensible Offirc4a1 teti." City of Tukwiqa, '.4206) 4'31-3680 e/1\ clk„, "1i kAPI /74! ef?" 11 D'a-t ee,"' BOU4evard"10 c)(' 6300 SouthcVs:tejs Tukwila, W/048488 .e." , . . . •.:'," 4 , •••-, r , .,,liv ., -I %,' Copies of the procedyres for SEPA.vapp„,eal!s are avtlable with the Department of Community, eAre-Lopment. •,7 • • CITY TUKWILA CONDITIONS Address: 7755 EAST MARGINAL WY S Applicant: Status: PENDING Permit No: E96-0036 Applied: 12/06/1996 Type: P-SEPA "..„7:-.-f -. ----- Approved: Location: 33/24/4 .- Parcel #: 000160 -0020.: --- Zoning: M2 1. Compltanc,e' witNa11associated.F,ederand Stace,permits. 4( **A***************44(44****4*4**********4*****22* *************************** lf.,;;.'" ict ''''$ Pleasp"r<ovidkcopies of all_the, perMi,ts r*quineds,,by other .4,-.---4 ,agensg;esd:T, other jyriseictions pripr to--Tnit4atlng,the work -7 ,•:', 2Wofprk-// be'l"owthecor,.: dinprAz high ,:- water -14, ' l': ‘` i •°., A lineshallibe, conducted duying a low tide cv.cy to avoid erosion'and,,s4dimention 4.4 • • • r. • (4 I - .• • • 1 , NtiSf,.; 7,>•••••,„.. • City of Tukwila Department of Commiunity Development December 19,, 1996 Mr. - Larry Allen Boeing Commercial Airplane Co. P.O. BQX 3707, Mail Stop 19-35 Seattle, WA 98124 • John W Rants, Mayor Steve Lancaster, Director. Re: Shoreline Exemption : Plant 2 Duwamish Sediment Interim Measures Work Plan - Outfall 12 and Underflow Flume, Tukwila File # E96-0036 and L96-0081. Dear Mr. Allen: The Department of Community Development has reviewed your project and SEPA checklist. In accordance with WAC 173-27-050 (Shoreline Management), we are providing you this letter of exemption for the project listed above. , The project is within navigable waters and is subject to a US Army Corps of Engineers permit (Section 10 Permit). • There is an Administrative Order on Consent issued by the U.S. Environmental Protection Agency (EPA) to the Boeing Company. Therefore, under WAC 173- 27-040 (3) Hazardous Substance Remedial Actions, the project is exempt from a "Shoreline" Substantial Development Permit. We have provided the necessary notification for this Shoreline Exemption and the SEPA Threshold Determination to the appropriate agencies. If you have any questions about this letter, please contact Gary Schulz at our office, 431-3670. Sincerely, Steve Lancaster Director of Community Development City of Tukwila cc: WA State Department of Ecology 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431-3670' • Fax (206) 431-3665 • City of Tukwila John W. Rants, Mayor Department of Community Development Steve Lancaster, Director MEMORANDUM TO: Steve Lancaster, DCD Director FROM: Gary Schulz, Urban Environmentalist DATE: December 19, 1996 RE: Plant 2 Duwamish Sediment Interim Measures Work Plan Outfall 12 and Underflow Flume - The Boeing Co.,E96-0036 & L96-0081. The Boeing Company is planning to conduct an interim hazardous sediment (PCBs) removal at the Plant 2 site located at 7755 E. Marginal Way. An Interim Measures Work Plan has been prepared to be consistent with the requirements of Administrative Order on Consent (Order - Docket No. 1092-01-22-3008 h) issued by the U.S. Environmental Protection Agency (EPA) to the Boeing Company. The Order became effective on January 18, 1994. A portion of the removal work will occur at an elevation below the ordinary high water line in the Duwamish River. One of the two interim sediment removal locations in a portion of the river channel that extends underneath the Plant 2 building. The total quantity of sediment material to be removed is approximately 25 cubic yards. All the removal work is planned for a low tide cycle in order to avoid working in the wet and potential resuspension of affected sediments. The SEPA conditions for this project are listed below: SEPA Conditions 1) Compliance with all associated Federal and State permits. Please provide copies of all the permits required by other agencies or jurisdictions prior to initiating the work. 2) Work below the ordinary high line shall be conducted during a low tide cycle to avoid erosion and sedimentation in the River. 3) Riverbank alteration will be restored to pre-existing location without encroachment into the channel. 6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431-3670 • Fax (206) 431-3665 AFFIDAVIT =,jOhftnt.-e, Mar1"e),I O Notice of Public Hearing O Notice of Public Meeting Board of Adjustment Agenda Packet []Board of Appeals Agenda Packet Planning Commission Agenda Packet []Short Subdivision Agenda Packet \,4Notice of Application for Shoreline Management Permit U Shoreline Management Permit OF DISTRIBUTION hereby declare that: []Determination of Non- significance 0 Mitigated Determination of Nonsignificance Determination of Significance and Scoping Notice ONotice of Action []Official Notice 0 Other []Other wasto each of the following addresses on i 9,' l(a �x�e Mak. 1,e)._ 1\4 vrck, L-1-(63(4- asga Name of Project M62.\ �Q File Number _ /1 " 6.Fc-- I L9 " cc3(,) 'nature iL» CITY OF UKWILA i DepartmeniTf Community Development 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 NOTICE OF APPLICATION PROJECT INFORMATION The Boeing Company has filed application for removal of PCB contaminated soil at Duwamish outfall #12 and beneath building 2-41 located at 7755 East Marginal Way in the City of Tukwila. Work will include excavation of concrete and soil and replacement with clean fill. An environmental checklist has been submitted. Other known required approvals include: U.S. Environmental Protection Agency Washington Department of Fisheries and Wildlife FILES AVAILABLE FOR PUBLIC REVIEW The project files are available at the City of Tukwila. To view the files, you may request them at the permit counter of the Department of Community Development (DCD), located at 6300 Southcenter Boulevard #100. Project Files include: E96-0036 SEPA Checklist L96-0081 Shoreline Permit Exemption Request OPPORTUNITY FOR PUBLIC COMMENT Your written comments on the project are requested. They must be delivered to DCD at the • address above or postmarked no later than 5:00 p.m., December 23, 1996. APPEALS You may request a copy of any decision, information on hearings, and your appeal rights by calling DCD at 431-3670. The environmental review decision is appealable to the City Council. For further information on this proposal, contact Nora Gierloff at 431-3670 or visit our offices at 6300 Southcenter Boulevard, Suite #100, Monday through Friday, 8:30 a.m. to 5:00 p.m. Application Filed: December 6, 1996 Notice of Application Issued: December 9, 1996 AFFIDAVIT kkru-Q. Pot-ci O Notice of Public Hearing Li Notice of Public Meeting OBoard of Adjustment Agenda Packet O Board of Appeals Agenda Packet OPlanning Commission Agenda Packet Short Subdivision. Agenda Packet N1Notice of Application for Shoreline Management Permit fl Shoreline Management Permit OF DISTRIBUTION hereby declare that: fl Determination of Non- significance LI Mitigated Determination. of Nonsignificance Determination of Significance and Scoping Notice fJ Notice of Action []Official Notice 0 Other Other was mailed to each of the following Name of Project llUd(( L addresses on File Number L9(- E-% 0036 City of Tukwila Department of Community Development 6300 Southcenter Boulevard Tukwila, WA 98188-2599 MUCKLESHOOT INDIAN TRIBE 39015 172nd AVE SE AUBURN, WA 98092 City of Tukwila Department of Community Development 6300 Southcenter Boulevard Tukwila, WA 98188-2599 iDUWAMISH INDIAN TRIBE 140 RAINIER AVE S - STE 7 RENTON, WA 98055-2000 City of Tukwila Department of Community Development 6300 Southcenter Boulevard Tukwila, WA 98188-2599 WA STATE ATTORNEY GEN ECOLOGY DEPARTMENT PO BOX 40117 OLYMPIA, WA 98504 City of Tukwila Department of Community Development 6300 Southcenter Boulevard Tukwila, WA 98188-2599 • WASH FISHERIES/WILDLIFE 16018 MILL CREEK BLVD MILL CREEK, WA 98012 • • • City of Tukwila Department of Community Development 6300 Southcenter Boulevard Tukwila, WA 98188-2599 . DEPARTMENT OF ECOLOGY SHORELINE PERMIT REVIEW 3190 160th AVE SE BELLEVUE , WA 98008-5452 City of Tukwila Department of Community Development 6300 Southcenter Boulevard Tukwila, WA 98188-2599 DEPARTMENT OF ECOLOGY SEPA REVIEW SECTION PO BOX 47703 OLYMPIA, WA 98504-7703 • • City of Tukwila Department of Community Development 6300 Southcenter Boulevard Tukwila, WA 98188-2599 US ENVIROMEMTAL PROTECTION AGENCY 1200 6TH AVE SEATTLE WA 98101 . CHECKLIST: EN/PRONMENTAL REVIEW/SHORELINE' PERMIT MAILINGS () U.S. ARMY CORPS OF ENGINEERS () FEDERAL HIGHWAY ADMINISTRATION () DEPT OF FISH & WILDLIFE () OFFICE OF ARCHAEOLOGY ( ) TRANSPORTATION DEPARTMENT () DEPT NATURAL RESOURCES () OFFICE OF THE GOVERNOR () DEPT OF COMMUNITY DEVELOPME 04 DEPT OF FISHERIES & WILDUFE J () KC. PLANNING & COMMUNITY DEV. () BOUNDARY REVIEW BOARD () FIRE DISTRICT #11 () FIRE DISTRICT #2 () S CENTRAL SCHOOL DISTRICT () TUKWILA UBRARIES () RENTON UBRARY () KENT UBRARY () CITY OF SEATTLE UBRARY ()USWEST () SEATTLE CITY UGHT () WASHINGTON NATURAL GAS () HIGHUNE WATER DISTRICT () SEATTLE WATER DEPARTMENT () TCI CABLEVISION () OLYMPIC PIPEUNE () KENT PLANNING DEPT () TUKWILA CITY DEPARTMENTS: () PUBUC WORKS ( ) FIRE () POUCE ( ) FINANCE () PLANNING () BUILDING () PARKS & REC. () MAYOR () PUGET SOUND REGIONAL COUNCIL () P.S. AIR POLLUTION CONTROL AGENCY (SW K C CHAMBER OF COMMERCE 00i. MUCKLESHOOT INDIAN TRIED DUWAMISH INDIAN TRIBE ✓✓ () DAILY JOURNAL OF COMMERCE () VALLEY DAILY NEWS 7/12/95 C:WP51 DATA\CHKUST FEDERAL AGENCIES 04 U.S. ENVIRONMENTAL PROTECTION AGENCY/ () U.S. DEPT OF H.U.D. WASHINGTON STATE AGENCIES () DEPT OF SOCIAL & HEALTH SERV. 04 DEPT OF ECOLOGY, SHORELANDS DIY✓ DEPT OF ECOLOGY, SEPA DIVISIOp4*✓ (4 OFFICE OF ATTORNEY GENERAL// * SEND CHECKLIST WITH DETERMINATIONS * SEND SITE MAPS WITH DECISION KING COUNTY AGENCIES () KC. DEPT OF PARKS () HEALTH DEPT () PORT OF SEATTLE () BUILDING & LAND DEV. DIV -SEPA INFO CENTER SCHOOLS/LIBRARIES () HIGHUNE SCHOOL DISTRICT () K C PUBUC UBRARY () SEATTLE MUNI REF UBRARY () SEATTLE SCHOOL DISTRICT () RENTON SCHOOL DISTRICT UTILITIES () PUGET SOUND POWER & UGHT () VAL-VUE SEWER DISTRICT () WATER DISTRICT #20 () WATER DISTRICT #125 () CITY OF RENTON PUBUC WORKS () RAINIER VISTA () SKYWAY CITY AGENCIES () RENTON PLANNING DEPT () CITY OF SEA -TAC () CITY OF BURIEN ( ) TUKWILA PLANNING COMMISSION MEMBERS ( ) TUKWILA CITY COUNCIL MEMBERS OTHER LOCAL AGENCIES () METRO ENVIRONMENTAL PLANNING DIV. OFFICE/INDUSTRIAL 5,000 GSF OR MORE RESIDENTIAL 50 UNITS OR MORE RETAIL 30,000 GSF OR MORE MEDIA () HIGHUNE TIMES (04 SEATTLE TIMES • • 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) Include these documents: SEPA Determination (3 -part form 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 & sent to newspaper). SHORELINE MAILINGS Notice of Application: Notice of application for a substantial development Permit must be mailed to owners and to property owners within 300 feet of subject property, prepare an affidavit of publication, and publish two consecutive weeks with deadline for comments due 30 days after last newspaper publication date. Shoreline Permit: Mail to: (within 8 days of decision; 30 -day appeal period begins date received by DOE) Department of Ecology Shorelands Section State Attorney General Applicant Indian Tribes Other agencies as necessary (checked off on attached list). Include these documents: Shoreline Substantial Development Permit (3 -part form from Sierra) Findings (staff report, if applicable) Shoreline 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 w/structures & shoreline Grading plan Vicinity map SEPA Determination (3 -part form from Sierra) Findings (staff report, usu. with MDNS) SEPA Checklist (filled out by applicant) Any background studies related to impacts on shoreline Notice of Application Affidavit of Distribution (notice was mailed & sent to newspaper) Affidavit of Publication (notice was published in newspaper). BOE/AW • October 15, 1996 R -1150 -96 -RR -420 Boeing Commercial Airplane G P.O. Box 3707 Seattle, WA 98124-2207 Ms. Sylvia E. Burges RCRA Compliance Section, HW -104 USS,. Environmental Protection Agency, Region 10 1200 Sixth Avenue Seattle, WA 98101 Dear Ms. Burges: Subject: Boeing Plant 2, WAD 00925 6819 RCRA Docket #1092-01-22-3008(h) Periodic Progress Report No. 33 (September 1996) As required by Section 10.6 of the subject Order, The Boeing Company (Boeing) is providing Periodic Progress Report No. 33 for September 1996, for work performed pursuant to the Order. RFI WORK STATUS RFI Progress Summary Progress towards the development of the Duwamish Waterway Sediment Human Health and Environmental Evaluation Work Plan continued through the month of September 1996. The general approach for conducting these evaluations was presented to EPA, WDOE, NOAA, and representatives of the Muckleshoot Indian Tribe in a meeting which took place on August 6, 1996. General consensus on Boeing's proposal was received at that time. As agreed in the August meeting, Boeing committed to the development of a more detailed scope of work document to be submitted to EPA in late September or October 1996. This document will offer specifics relating to the methodology to be used to assess the potential risk to health and potential impacts to the environment. Currently, Boeing anticipates completion and delivery of the Duwamish Waterway Sediment Health and Environmental Evaluation Work Plan to EPA in mid-October 1996. Boeing also informed EPA in the above referenced meeting that a proposal for conducting an Interim Measure in the Duwamish sediments off the Plant 2 Facility was currently being refined. The Interim Measure proposal in the Duwamish sediments was presented to EPA, WDOE, and NOAA on September 24, 1996. A copy of the Interim Measure proposal in the Duwamish sediments was mailed to the Muckleshoot Indian Tribe on September 26, 1996. Boeing's proposalinvolved conducting limited sediment excavations at two locations along the Plant 2 shoreline. BOEfA'i' • Page 2 Ms. Sylvia Burges R -1150 -96 -RR -420 The rational for scoping the proposed Interim Measure in the Duwamish was to satisfy the following objectives: 1) establish a meaningful removal criteria that allowed taking action in the near term due to permitting complications, 2) removal of contaminated material that would have to be segregated during implementation of the final remedy due to TSCA requirements, and 3) offered no risk of re -suspension or dispersal of contaminated sediments. The criteria proposed for this Interim Measure is the removal of PCB surface sediment contamination greater than 25 ppm. There are only two locations along the Plant 2 shoreline which exceed this criteria. The two locations are 1) Outfall 12 at the 2-49 Building and 2) the underflow flume located in the middle of the 2-41 Building. It is estimated that approximately 8.8 and 14.2 bank cubic yards, respectively, of PCB sediment contamination exceeds this criteria. This proposal was well received by the attending agency representatives at the September 24 meeting and Boeing was encouraged to proceed with all planning necessary to implement the proposed Interim Measure. Additionally, Boeing committed to developing a formal Interim Measures Work Plan for this proposal to be submitted to EPA concurrently with planning and implementation of the Interim Measure. 2-70 Building Oil/Water Separator In mid September 1996, a previously unknown oil/water separator was discovered at the 2-70 Building in the southern part of the Plant 2 Facility as part of a repaving construction repair. The separator was located on the south side of the 2-70 Building in a vehicle traficway adjacent to the building. It's approximate size was 5' long by 4' wide by 5' deep. The separator was no longer in operation, was filled with pea gravel, and had been paved over completely. A preliminary investigation of the historical operation of the separator revealed that it was associated with the activities of previously identified SWMU 2-70.5. On September 26,1996, EPA was notified of this discovery (telephone conversation between Sylvia Burges and Rudolph Rogers). Additionally, EPA was informed of Boeing's intent to remove the separator and sample the surrounding soil for release determination. The removal and sampling was completed in early October 1996. The results of the related investigation will be reported in the October 1996 Periodic Progress Report. ORDER DELIVERABLES/ACTIONS COMPLETED THIS REPORTING PERIOD (SEPTEMBER 1996) The following Order driven activities were completed during this reporting period: - Presentation of the proposal to conduct an Interim Measure in the Duwamish Sediments off the Plant 2 Facility to EPA, WDOE, NOAA on September 24, 1996. BOE/Arc Page 3 Ms. Sylvia Burges R -1150 -96 -RR -420 ACTIVITIES PLANNED FOR NEXT REPORTING PERIOD (OCTOBER 1996) The following activities are planned for the next reporting period: - A Work Plan for conducting Interim Measures in the Duwamish sediments off the Plant 2 Facility will be submitted to EPA in October 1996. - A Sediment Human Health and Ecological Evaluation in the Duwamish Waterway Work Plan will be submitted to EPA in October 1996. - The Facilitywide Monitoring Well Network Groundwater Sampling and Analysis Report for May 1996 will be submitted to EPA in October 1996. Should you have any qu - stions regarding this periodic report, please don't hesitate to call. P s Jr. dinator 737/ Programs R-1150, 19-16 (206) 544-2393 M. Babich, III Environmental Affairs Manager 737/757 Programs R-1150, 63-41 (206) 234-1766 cc: Byung Maeng - Washington Department of Ecology Teresa C. Michelsen - Washington Department of Ecology BOEIWG • • Page 4 Ms. Sylvia Burges R -1150 -96 -RR -420 bcc: Mary Armstrong 19-01 Mike Babich 63-41 Larry Cameron 19-14 Paul Carlson 13-08 Skip Fox 7A-XA Charles Keller 19-16 Jim Medzegian 63-60 T. McCain 13-08 J.J. Nelson 2R-70 Kirk Thomson 7A -XE Liz Warman 14-49 STATE OF WASHINGTON DEPARTMENT OF ECOLOGY Northwest Regional Office, 3190 - 160th Ave S.E. • Bellevue, Washington 98008-5452 • (206) 649-7000 October 14, 1996 Rudy Rogers The Boeing Company P.O. Box 3707, R-1150, 19-16 Seattle WA 98101 Re: Interim Cleanup Plan Dear Rudy: This letter clarifies Ecology's expectations for an interim cleanup plan under SMS. Because final rule language has not yet been developed to address interim cleanups under SMS, the items below are adapted from MTCA cleanup regulations (draft SMS rule language is also based on the MTCA regulations). These items also include information needed to facilitate permitting of the action. It is understood that these elements will be included in an interim measures plan that will be submitted to EPA under RCRA. The following elements should be addressed (not necessarily in this order): • The goals of the interim action, including an explanation of why it is appropriate to conduct this specific interim action ahead of the final action • A description of the proposed interim action and schedule • Alternative interim actions considered and reasons for selecting the proposed action • A statement describing its relationship to the larger area potentially requiring cleanup and possible final actions to address this area, including whether the interim action has the potential to foreclose future cleanup alternatives • Relevant summary information from the RFI, including maps of the areas to be excavated and existing sampling data from these areas • A description of site conditions that affect the interim action, such as buildings, bathymetry, tides, etc. that have been taken into account in designing the action • Engineering specifications • Potential environmental impacts and mitigation measures (e.g., silt curtains) • Monitoring/sampling and analysis plan for any samples to be taken before, during, or immediately after construction. i~� As you are aware, conducting an interim cleanup action does not address or limit Boeing's responsibility for conducting a final cleanup of the sediment contamination adjacent to the Boeing Plant 2 site under SMS. Please contact me at 649-7257 with any questions on the above, and let me know if I can assist you further. Sincerely, Teresa Michelsen Sediment Cleanup Specialist cc: Sylvia Burges, EPA Rachel Friedman -Thomas, Ecology CITY OF TUKWILA Department of Community Development 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 ENVIRONMENTAL REVIEW (SEPA) APPLICATION SUBMITTAL REQUIREMENTS To submit for SEPA review, provide the items listed above to the Planning Division at 6300 Southcenter Boulevard, Room 100. ❑ 8 copies of the completed and signed environmental checklist. You may use the City's pre-printed form or you may re -type the questions on your computer. If you choose to re -type the form into your computer, be sure to do so accurately. Mistakes or omissions will increase the review time. ❑ 8 sets of the full size plans needed to clearly describe the proposed action. ❑ One PMT set of plans reduced to 8.5" x 11". ❑ Four copies of supporting studies. ❑ One copy of the checklist application. ❑ One set of mailing labels for all properties 500' from the subject property. (See address label worksheet.) ❑ $325 filing fee. The checklist contains several pages of questions which you are asked to answer. It covers a comprehensive set of topics. As a result, several of the questions may not apply to your project. If a particular question does not apply, simply write N/A undemeath. HOWEVER, be aware that many questions apply despite appearing not to. Care needs to be taken in reading and answering the questions to ensure the appropriate response is provided. It is important that accurate and clear information be provided. You may not know all of the answers. Answer each question to the best of your ability. If we find an answer to be insufficient, the City may contact you to ask for more information. Sometimes, after reviewing the checklist, the City will ask you provide additional studies or information. Commonly requested information includes traffic analysis, site topography, soils studies and tree surveys. CITY OF TUKWILA 6300 Southcenter Boulevard, Tukwila, WA 98188 DEPARTMENT OF COMMUNITY DEVELOPMENT Telephone: (206) 431-3670 ADDRESS LABEL REQUIREMENTS The City of Tukwila requires that neighboring residents, businesses and property owners be notified of certain types of pending applications in order to encourage citizen participation in the land use process. Applicants are therefore required to submit the following materials: • Mailing labels listing the owners of record for all property within 500 feet of the boundaries (not the center) of the applicant's site (2 sets or 3 sets if SEPA review is required). • Mailing labels listing the residents or businesses of any property within 500 feet of the property if they are different from the land owners (2 sets or 3 sets if SEPA review is required). • One copy of an assessor's map(s) showing the boundaries of the subject property and the 500 foot radius. Property owner names and addresses can be obtained from the King County Department of Assessment located on the 7th floor of the King County Administration Building, Room 700, 500 Fourth Avenue, Seattle. To compile the information required: • Obtain the assessor's map(s) which contain(s) your property and all neighboring properties within 500 feet (See example diagram). You may use the maps on file in the Assessor's Office or purchase a set from the King County Department of Public Works Map Counter on the 9th floor of the Administration Building. Purchased maps must be ordered several hours in advance of the time you would like to pick them up. • After securing the assessor's maps, obtain a "Real Estate Inquiry Batch Request Sheet" from the Department of Assessment. On this form provide the tax account number for each affected property as shown on the assessor's map(s) and submit the completed form to the Department of Assessment with the appropriate fee. Applicants can request that the information be printed in mailing label form or on standard paper. To obtain occupants/resident/business names and addresses, consult the Kroll maps located in the Tukwila Department of Community Development and then visit the site to determine resident names and unit numbers. The information on the mailing labels may refer to "Resident" or "Tenant", with the proper mailing address, if the specific name is unknown. ENVIRONMENTAL CHECKLIST Purpose of Checklist: The State Environmental Policy Act (SEPA), chapter 43.21C RCW, requires all governmental agencies to consider the environmental impacts of a proposal before making decisions. An environmental impact statement (EIS) must be prepared for all proposals with probable significant adverse impacts on the quality of the environment. The purpose of this checklist is to provide information to help you and the agency identify impacts from your proposal (and to reduce or avoid impacts from the proposal, if it can be done) and to help the agency decide whether an EIS is required. Instruction for Applicants: This environmental checklist .asks you to describe some basic information about your proposal. The City uses this checklist to determine whether the environmental impacts of your proposal are significant, requiring preparation of an EIS. Answer the questions briefly, with the most precise information known, or give the best description you can. You must answer each question accurately and carefully, to the best of your knowledge. In most cases, you should be able to answer the questions from your own observations or project plans without the need to hire experts. If you really do not know the answer, or if a question does not apply to your proposal, write "do not know" or "does not apply". Complete answers to the questions now may avoid unnecessary delays later. Some questions ask about governmental regulations, such as zoning, shoreline, and landmark designations. Answer these questions if you can. If you have problems, the City staff can assist you. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attached any additional information that will help describe your proposal or its environmental effects. The City may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. Use of checklist for nonproject proposals: Nonproject proposals refer to actions which are different or broader than a single site specific development project, such as plans, policies and programs. Complete this checklist for nonproject proposals, even though questions may be answered "does not apply". In addition, complete the supplemental sheet for nonproject actions (part D). For nonproject actions, the references in the checklist to the words "project", "applicant", and "property or site" should read as "proposal', "proposer", and "affected geographic area", respectively. CITY OF TUKWILA Department of Community Development 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 SEPA APPLICATION CHECKLIST FOR STAFF USE. ONLY Planner: ........... ....... . Fite Number: Receipt Number: Cross-reference files: Applicant notified of incomplete application: •Applicant.. notified: of. complete: application: Notice'of application issued:. A. NAME OF PROJECT/DEVELOPMENT: PLIANT J t JJniSN scDl=rNi iTR.IM 1i1 A5U12$ U-'ofz Pt AO B. LOCATION OF PROJECT/DEVELOPMENT: (address and accessors parcel number(s)) PKCtti ti. 0001(10- 002 o 7755 Ern .s I vkL. Wy • SEArr ; , UJA 9SIZ Quarter: Section: 33 Township: L9 N Range: eA-5r- (This information may be found on your tax statement) C. PROJECT DESCRIPTION: .ErnoVAL, O15Po5i�L BF (2- PAS v).11-1 it PC/3 CoNCCPTZ4ri7ci) D. APPLICANT: NAME: IOL`/vv 177/7; pi, ADDRESS: P� 0, Boie. 3707 lei -36 PHONE: 3i/ z -/— SIGNATURE: DATE: Control No. Epic File No. Fee $ 325 Receipt No. ENVIRONMENTAL CHECKLIST A. BACKGROUND n 1. Name of proposed project, if applicable: PLIW . Duwimt5t Se'M111EIV iN,E21m rfl A vim.. W tAlc pLRnj 2. Name of applicant: Bceif ComtfhAU w . 3. Addresssand phonenpnumber of applicant and contact person: 1i, 0, 3-10-7 0,1'5 lei -35 LE. Prgl.0 ) �f T1 D 171 PH . ,!5-111-1 1(0-19 L- PW.42 y %- LLeii (c o iJ a c7) 4. Date checklist prepared: ih)VG11\6e.-12. 2Z, i'i 5. Agency requesting Checklist: City of Tukwila 6. Proposed timing or schedule (including phasing, if applicable): /: /2-i9J7 77tJO 0 CYN ff A. /Q • , 997 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. jt/O 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. 17rr4(-# ti42 9.. Do you know whether applications are pending for governmental approvals of other proposals directl affecting the property covered by your proposal? If yes, explain. /y�f�- -2- 10. List any government approvals or permits that will be needed for your proposal. \.-r/aQnnTic- s et2m iu 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. Section E requires a complete • description of the objectives and alternatives of your proposal and should not be summarized here. -477/gc:H iiD 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applica- tions related to this checklist. 14/0 /( /N Ail ✓i.°,4rr► /s iy R ✓ So a; n v F /114 41.vFi✓i)� i124G� See A 3/1-4i> m 69"7" 13. Does the proposal lie within an area designated on the City's Comprehensive Land Use Policy Plan Map as environmentally sensitive? -3- TO BE COMPLETED BY APPLICANT Evaluation for Agency Use Only B. ENVIRONMENTAL ELEMENTS 4•/4 1. Earth a. General description of the site (circle one): Flat, rolling, hilly, steep slopes, mountainous, other b. What is the steepest slope on the site (approximate percent slope)? 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. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. e. Describe the purpose, type, and approximate quanti- ties of any filling or grading proposed. Indicate source of fill. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? -4- Evaluation for Agency Use Only h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: 2. Air /N a. What types of emissions to the air would result from the proposal (i.e., dust, automobile odors, industrial wood smoke) during construction and when the project is completed? If any, generally describe and give approximate quantities if known. b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. c. Proposed measures to reduce or control emissions or other impacts to air, if any: 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. -5- Evaluation for Agency Use Only 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. p31 Sem ATrA- in ti - 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 . 0 urritcL 11 ,2..- 1g B4�x-ecy 12' x/o' x2' a OVDCP-Gcccu FLuf alt IC/ 12.'xR,X2' 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quan- tities, if known. 5) Does the proposal lie within a 100 -year floodplain? If so, note location on the site plan. )(Es" 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. )114 -6- b. Ground: Evaluation for Agency Use Only 1) Will ground water be withdrawn, or will water be discharged to ground water? Give general description, purpose, and approximate quan- tities, if known. f0 2) Describe waste materials that will be discharged into the ground from septic tanks or other sour- ces, 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. N !} 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 into other waters? If so, describe. Alp- -7- Evaluation for Agency Use Only 2) Could waste materials enter ground or ,Surface waters? If so, generally describe. N/4 d. Proposed measures to reduce or control surface, ground, and runoff water impacts, if any: 4//6,-- 4. Plants /0 a. Check or circle types of vegetation found site: deciduous evergreen shrubs grass pasture crop or grain wet soil plants: cattail, skunk cabbage, other water plants: water lily, _ other types of vegetation b. *What kind and amount of vegetation or altered? tree: alder, maple, aspen, other tree: fir, cedar, pine, other on the buttercup, bullrush, eelgrass, milfoil, other will be removed c. List threatened or endangered species known to be on or near the site. -8- d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: 5. Animals .'V1/4- a. Circle any birds and 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: b. List any threatened or endangered species known to be on or near the site. c. Is the site part of a migration route? If so, explain. d. Proposed measures to preserve or enhance wildlife, if any: -9- Evaluation for Agency Use Only Evaluation for Agency Use Only 6. Energy and Natural Resources N/A a. What kinds of energy (electric, natural gas, oil, wood stove, color) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. 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: 7. Environmental Health iv,/61 a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this proposal? If so, describe. 1) Describe special emergency services that might be required. 2) Proposed measures to reduce or control environ- mental health hazards, if any: -10- b. Noise NIR Evaluation for Agency Use Only 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? 2) What types and levels of noise would be created by or associated with the project on a short- term or a long-term basis (for example: traf- fic, construction, operation, other)? Indicate what hours noise would come from the site. 3) Proposed measures to reduce or control noise impacts, if any: 8. Land and Shoreline Use a. What is the current use of the site and adjacent properties? 1 pa.5TR/if _- b. Has the site been used for agriculture? If so, describe. c. Describe any structures on the site. .1-A✓Ov5.02,AL_ A /10 4/6-- Bo/ i_O/i/47.3 -11- Evaluation for Agency Use Only d. Will any structures be demolished? If so, what? /10 e. What is the current zoning classification of the site? -C 7174 f. What is the current comprehensive plan designation of the site? -�/ /' If applicable, what is the current shoreline master program designation of the site? CA &41p).) g. h. Has any part of the site been classified as an "environmentally sensitive" area? If so, specify. �,Ls c� r. Q / / AJ a U € ►^ 6 i. Approximately how many people would reside or work in the completed project?, - j. Approximately how many peo le would the completed project displace? A k. Proposed measures to avoid or reduce displacement impacts, if any: _LViff 1. Proposed measures to ensure the proposal is com- patible with existing ar?d projected land uses and plans, if any: /VIA" -12- Evaluation for Agency Use Only 9. Housing n1/4 a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing? b. Approximately how many units, if any, would be eli- minated? Indicate whether high, middle, or low- income housing. c. Proposed measures to reduce or control housing impacts, if any: 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? b. What views in the immediate vicinity would be altered or obstructed? c. Proposed measures to reduce or control aesthetic impacts, if any: -13- Evaluation for Agency Use Only 11. Light and Glare /J/ - a. What type of light or glare will the proposal produce? What time of day would it mainly occur? b. Could light or glare from the finished project be a safety hazard or interfere with views? c. What existing off-site sources of light or glare may affect your proposal? d. Proposed measures to reduce or control light and glare impacts, if any: 12. Recreation /L/A- a. What designed and informal recreational oppor- tunities are in the immediate vicinity? b. Would the proposed project displace any existing recreational uses? If so, describe. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: •-14- Evaluation for Agency Use Only 13. Historic and Cultural Preservation 41/4- a. Are there any places or objects listed on, or pro- posed for, national, state, or local preservation registers known to be on or next to the site? If so, generally describe. b. Generally describe any landmarks or evidence of historic, archaeological, scientific, or cultural importance known to be on or next to the site. c. Proposed measures to reduce or control impacts, if any: 14. Transportation N a. Identify public/streets and highways serving the site, and describe proposed accss to the existing street system. Show on site plans, if any. b. Is the site currently served by public transit? If not, what is the approximate distance to the nearest transit stop? c. How many parking spaces would the completed project have? How many would the project eliminate? -15- Evaluation for Agency Use Only 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). e. Will the project use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. f. How many vehicular trips per day would be generated by the completed project? If known, indicate when peak volumes would occur. g. Proposed measures to reduce or control transpor- tation impacts, if any: 15. Public Services N/it 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. b. Proposed measures to reduce or control direct impacts on public services, if any. -16- 16. Utilities N/ a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other. b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. C. Signature The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. Signature: ,(��7 p Q_. Date Submitted: /�- .s - 5/ PLEASE CONTINUE TO THE NEXT PAGE. -17- Evaluation for Agency Use Only TO BE COMPLETED BY APPLICANT Evaluation for Agency Use Only D. SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (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 the 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 imple- mented. Respond briefly and in general terms. 1. How would the proposal be likely to increase discharge to water; emissions to air; production, storage, or release of toxic or hazardous substances; or production of noise? //,g Proposed measures to avoid or reduce such increases are: 2. How would the proposal be likely to affect plants, ani- mals, fish, or marine life? ,ev,k Proposed measures to protect or conserve plants, ani- mals, fish, or marine life are: -18- Evaluation for Agency Use Only 3. How would the proposal be likely to deplete energy or natural resources? Proposed measures to protect or conserve energy and natural resourses are: 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 habitat, historic or cultural sites, wetlands, floodplains, or prime farmlands? ^r/� Proposed measures to protect such resources or to avoid or reduce impacts are: 5. How would the proposal be likely to affect land and shoreline use, inclduing whether it would allow or encourage land or shoreline uses incompatible with existing plans? 44- -19- Evaluation for Agency Use Only Proposed measures to avoid or reduce shoreline and land use impacts area: How does the proposal conform to the Tukwila Shoreline Master Plan? 6. How would the proposal be likely to increase demands on transportation or public services and utilities? Proposed measures to reduce or respond to such demand(s) are: 7. Identify, if possible, whether the proposal may conflict with local, state, or federal laws or requirements for the protection of the environment. -20- Evaluation for Agency Use Only 8. Does the proposal conflict with policies of the Tukwila Comprehensive Land Use Policy Plan? If so, what poli- cies of the Plan? Proposed measures to avoid or reduce the conflict(s) are: -21- TO BE COMPLETED BY APPLICANT Evaluation for Agency Use Only E. SUPPLEMENTAL SHEET FOR ALL PROJECT AND NON PROJECT, PROPOSALS The objectives and the alternative means of reaching the objectives for a proposal will be helpful in reviewing the aforegoing items of the Environmental Checklist. This information provides a general overall perspective of the proposed action in the context of the environmental infor- mation provided and the submitted plans, documents, suppor- tive information, studies, etc. 1. What are the objective(s) of the proposal? CLL"Aly UP OF pC 3's - 5E6 A-7724crr '0 2. What are the alternative means of accomplishing these objectives? ,,,/A. 3. Please.compare the alternative means and indicate the preferred course of action: 4,/4 -22- Evaluation for Agency Use Only 4. Does the proposal conflict with policies of the Tukwila -Comprehensive Land Use Policy Plan? If so, what poli- cies of the Plan? N/ A Proposed measures to avoid or reduce the conflict(s) are: -23- 1%,.,--ab,aNr* ;..1,,,qr eC+s.,.461 -,I ]Plant 2 Duwamish Sediment _nterim Measures Wor:c Plan Outfall 12 and Uncerflow 71urne oeing - Plant 2 Seattle/Tukwila, Washington Submitted To: The ►: oeing Company oeing Information Support Services Safety, Health, and Environmental Affairs October 1996 Plant 2 Duwamish Sediment Interim Measures Work Plan Outfall 12 and Underflow Flume Boeing—Plant 2 Seattle/Tukwila, Washington Submitted to: The Boeing Company Boeing Information Support Services Safety, Health, and Environmental Affairs Seattle, Washington October 1996 Prepared by: Roy F. Weston, Inc. 700 Fifth Avenue Suite 5700 Seattle, Washington 98104-5057 WO: 3709-034-143-0010 TABLE OF CONTENTS Section Page 1. INTRODUCTION 1 1.1 RATIONALE 1 1.2 INTERIM MEASURES OBJECTIVES 1 1.3 PROJECT PARTICIPANTS AND RESPONSIBILITIES 2 2. DESCRIPTIONS OF IM LOCATIONS 3 2.1 OUTFALL 12 3 2.2 UNDERFLOW FLUME 3 3. ALTERNATIVE INTERIM ACTIONS EVALUATION 4 4. SCOPE OF WORK 4 4.1 WORK SCOPE COMMON TO BOTH IMS 4 4.1.1 Health and Safety Plans 4 4.1.2 Permits 5 4.1.3 Access 6 4.1.4 Transportation and Disposal (T&D) 6 4.2 DESCRIPTION OF WORK ELEMENTS FOR IMS 6 4.2.1 Outfall 12 Plans and Specifications 6 4.2.2 Underflow Flume Plans and Specifications 8 5. OPERATION AND MAINTENANCE 11 6. MONITORING 11 7. SCHEDULE 11 8. INTERIM MEASURE CONSTRUCTION QUALITY ASSURANCE 11 9. REPORTING REQUIREMENTS 11 LIST OF TABLES Table Title 1 Outfall 12 QA Checklist 2 Underflow Flume QA Checklist 96-885W.DOC Page 29 October 1996 PR 10/SEA Plant 2 Duwamish Sediment Interim Measures Work Plan, Outfall 12 and Underflow Flutne Table of Contents LIST OF FIGURES Figure Title 1 Sediment ICM Organization Chart 2 Location of PCB Removal Areas 3 Outfall 12 Removal 4 Underflow Flume Removal 5 ICM Schedule 96-885W.DOC iv 29 October 1996 PR10/SEA PLANT 2 DUWAMISH SEDIMENT INTERIM MEASURES WORK PLAN OUTFALL 12 AND UNDERFLOW FLUME TUKWILA, WASHINGTON 1. INTRODUCTION This plan describes the scope of work to accomplish interim measures (IMs) at two locations at Boeing Plant 2 to reduce PCB concentrations in fill and sediment. This action targets the two highest PCB concentration areas found during the RCRA Facility Investigation (RFI) at Plant 2. This Interim Measures Work Plan has been prepared to be consistent with the requirements of the Administrative Order on Consent (Order) issued by the U.S. Environmental protection Agency (EPA) to The Boeing Company (Boeing) under the authority of Section 3008(h) of the Resource Conservation and Recovery Act of 1976 (RCRA), as amended, 42 USC 6928(h). This Order [RCRA Docket No 1092-01-22-3008(h)] became effective on 18 January 1994. 1.1 RATIONALE This proposed action targets the two highest PCB concentration areas found near or in the Duwamish Waterway during the RFI at Plant 2. Although the PCBs do not present "an immediate threat to human health and the environment," Boeing is proposing these IMs because: • Removal of the "hot spots" source areas will reduce potential PCB migration and tend to prevent the current areas of concern from expanding in size before the final corrective action is implemented. These areas present a disproportionate potential risk when compared to other areas of the waterway. • The IMs will reduce potential exposure prior to the final corrective action. • The action will be consistent with final remedies for the waterway. • The action will simplify the final remedy with regard to waste segregation. • The scope of the action facilitates a timely response to mitigate conditions. 1.2 INTERIM MEASURES OBJECTIVES The objectives of these two IMs are: • Removing PCB "hot spot" source areas to minimize potential PCB migration. 96-885W.DOC 1 29 October 1996 PRIO/SEA 96-885W.DOC 2 29 October 1996 PR10/SEA Plant 2 Duwamish Sediment Interim Measures Work Plan, Outfall 12 and Underflow Flume offs, spill protection and general laborers. The interim action construction subcontractor will report directly to WESTON's on-site construction engineer. Specialty Subcontractor Specialty subcontractors will be responsible for providing unique services such as vacuum truck services, floor cutting, temporary tank provisions, etc. These subcontractors will report directly to WESTON. An overall organization chart is shown in Figure 1. 2. DESCRIPTIONS OF IM LOCATIONS The two areas targeted for IMs are depicted on Figure 2. The PCB concentrations contours represent a professional judgment of the distribution of total PCBs. PCBs will be removed within the estimated 25 ppm contour consistent with the rationale and goals. A description of each area of removal is provided below. 2.1 OUTFALL 12 The terminus of Outfall 12 discharged to the bank surface on the southwest edge of the facility (see Figures 2 and 3) at an elevation above the ordinary high water line. The elevation of this area is approximately +9 feet MLLW. The area of PCB release greater than 25 ppm is outside the. 2-49. Building overhang. Maximum PCB concentrations found in this area were 26 ppm (surface) and 890 ppm (subsurface). The affected area is exposed and accessible during low tide. The potentially PCB -laden material on the surface of the bank consists of riprap, crushed rock, and granular fill. Subsurface material is composed of granular fill consisting of sand and gravel. Moisture content is expected to be low (in-place density of approximately 130 lb/ft3). The total material proposed for removal from the Outfall 12 area is approximately 8.8 bank yd3 (bcy). The planned excavation is 10 feet wide by 12 feet long by 2 feet deep with vertical sidewalls. 2.2 UNDERFLOW FLUME The underflow flume is located beneath the floor of the 2-41 Building which overhangs the Duwamish Waterway (see Figures 2 and 4). The overhang is supported on 10 -foot centers by driven wood piles. The material having PCB concentrations greater than 25 ppm is located underneath the footprint of the 2-41 Building overhang. This area is below the ordinary high water line at an elevation of approximately 0 feet MLLW. Minor debris (dimensional lumber, rubble, etc.) is mixed with the underlying sediment. Maximum PCB surface concentrations in this area are less than 25 ppm. 96-885W.DOC 3 29 October 1996 PR10/SEA Plant 2 Duwamish Sediment Interim Measures Work Plan, Outfall 12 and Underflow Flume The maximum subsurface PCB sediment concentration is 32.4 ppm. The sediment to be removed is expected to be fine sand and silt, with 30 to 60 percent water content with an in-place density of 105 lb/ft3. The total inplace volume planned for removal from the underflow flume is 14.2 bcy. The proposed excavation is 12 feet wide by 16 feet long by 2 feet deep with vertical sidewalls. 3. ALTERNATIVE INTERIM ACTIONS EVALUATION Several alternatives were considered for these hot spots. The alternatives were: • No action • • Capping • Removal No action was not selected because of the potential for the hot spot constituents to migrate and because existing conditions could complicate waste segregation during implementation of the final ill1ii remedy. Migration of the PCBs also could make the final corrective action encompass a larger area and could increase the impact on the environment. Capping was not selected because it may not be consistent with the final action. Capping could result in increased dredging volumes and disposal costs if a removal action is selected as the final remedy in whole or in part. Removal was selected because it eliminates the potential for migration prior to the final remedy implementation and simplifies waste segregation for the final remedy. Removal is also compatible with any final remedy selected. 4. SCOPE OF WORK Two separate and distinct removals are planned. The removal occurring at Outfall 12 will be performed using conventional excavation equipment. The removal planned for the Underflow Flume will be completed by a vacuum excavation removal method. The removal plans and specifications for each IM are described below. 4.1 WORK SCOPE COMMON TO BOTH IMS 4.1.1 Health and Safety Plans An OSHA/WISHA-compliant HASP covering all personnel will be prepared. A HASP will be prepared by both Weston and the Interim Action Construction Subcontractor. The HASP will address protective equipment, safety procedures, and training. 96-885W.DOC 4 29 October 1996 PRI 0/SEA Plant 2 Duwamish Sediment Interim Measures Work Plan, Outfall 12 and Underflow Flume It is anticipated that the work will be performed in modified level D PPE. This includes the following equipment: • Hard-hats with spray shields • Safety Glasses • Rubber steel toed boots/leather steel toed work boots • Water resistant coveralls (SARANEX) • Chemical resistant gloves • Personnel flotation devices 4.1.2 Permits The potentially applicable permits may include the following • Grading Permit • State Environmental Policy Act (SEPA)—City of Tukwila • Shoreline Development Permit—City of Tukwila • 401 Certification/Water Quality Certification—Washington State Dept. of Ecology (WDOE) • Coastal Zone Management consistency (CZM)—WDOE • Hydraulics Permit Application (HPA)—Department of Fisheries • Right of Entry—Department of Natural Resources • U.S. Army Corps of Engineers Dredging Permit under the Clean Water Act § 404 (may qualify for Nationwide Permit, such as #38 Cleanup of Hazardous and Toxic Waste) • Approval to Allow Temporary Exceedance of Water Quality Standards- Department. of Ecology • Section 10 Permit (for work in navigable waters) - U.S. Army Corps of Engineers This list may not be inclusive. The unique approaches to the IMs described below were developed so as to minimize permitting requirements to achieve the goal of a timely response. The proposed actions are designed to facilitate expedited processing of, or waivers from, the potential permitting with the aid of WDOE/EPA. 96-885W.DOC 5 29 October ] 996 PR10/SEA Plant 2 Duwamish Sediment Interim Measures Work Plan, Outfall 12 and Underflow Flume To expedite the permitting process, a Joint Aquatic Resources Permit Application (JARPA) can be completed and submitted to the involved agencies. This allows a single permit to be completed which fulfills the need of many of the above listed permits. Permits covered under the JARPA include 1) Hydraulic Permit, 2) Shoreline Management Permits, 3) Approval for Exceedances of Water Quality Permits, 4) Section 401 Water Quality Certifications, 5) Floodplain Management Permits, 6) Section 404 Permit and 7) Section 10 Permit. 4.1.3 Access An access agreement will be required for Outfall 12 and, potentially, the underflow flume. The proposed removal at Outfall 12 is not on Boeing property, and the removal area at the underflow flume abuts property owned by the Port of Seattle. 4.1.4 Transportation and Disposal (T&D) The sediment is a remediation waste (dredged material) some of which may contain PCBs at concentrations of 50 ppm or greater. The dredged material will be disposed of in a hazardous waste landfill permitted to receive TSCA waste in accordance with 40 CFR 761.60(a)(5)(ii). The sediment will be stabilized to meet the requirements of the disposing landfill. Boeing will arrange and pay direct for T&D of the dredged material. Boeing will also be responsible for disposal of all liquids and debris generated from sediment dewatering, personnel decontamination, etc. 4.2 DESCRIPTION OF WORK ELEMENTS FOR IMS 4.2.1 Outfall 12 Plans and Specifications The material to be removed at this location consists of gravel and sand which resides on a steeply declining slope to the Duwamish Waterway. Standard excavation techniques and equipment are recommended for removal of the affected soil. A sketch showing the proposed plan is provided in Figure 3. Mobilization Limits of excavation will be measured and staked. The area to be excavated is 10 feet wide by 12 feet long by 2 feet deep. Existing emergency response boat and booms will have to be relocated for the day due to access limitations. An adsorbent pad boom will be placed on the sediment surrounding the excavation area out board of the silt curtain. A silt curtain/fence will be installed at the base of the slope. A track hoe will be mobilized and will cut a bench in the slope from which to work. The large track hoe is required to get the boom length necessary for the removal. The material cut from the bench will be stockpiled adjacent to the building for reuse. Backfill will be ordered and on call. Excavation of the affected soil will be scheduled for a zero tide day. An exclusion zone will be established at the top of the slope area approximately parallel with the south wall of the building. Modified level D PPE will be required beyond the exclusion zone. A small decontamination station will be setup adjacent to the exclusion zone which will include PPE, 96-885W.DOC 6 29 October 1996 PRI O/SEA Plant 2 Duwarnish Sediment Interim Measures Work Plan, Outfall 12 and Underflow Flume a decontamination tub, brushes, disposal bin for used PPE, first aid kit and other supplies. Dump trucks will be kept outside the exclusion zone in the clean zone. Plastic sheeting will be placed on the ground between the excavation area and the dump trucks to keep from impacting unaffected soil with PCBs as it is loaded by the excavator. Removal The excavator will remove riprap and soil to the limits specified by the supervising engineer. Excavation material will be loaded into solo dump trucks. The trucks will be draped with a plastic liner. Dump trucks will contain stabilizing agent such as cement kiln dust (CKD) provided directly from bags by technicians. The first dump truck will go to a certified scale to verify weight and return if too heavy. A second single dump truck will carry any overs and the balance of the excavation. Post -excavation documentation sampling will occur after excavation limits have been reached. A post excavation sampling grid will be sampled for total PCBs upon completion of excavation to the defined limits. The purpose is to document conditions prior to backfill and/or direct additional excavation. Four samples will be taken from the bottom of the 10 foot by 12 foot excavation area. An amino assay test kit (D -Tech Kit No. Tk-1002-1, EPA Method 4020) will be used for the field sampling to identify PCB concentrations of Aroclor 1254 and 1260. The field screening samples will be tested on-site. Data from these tests will be used to decide whether to backfill or continue removal. One confirmation sample will be submitted to ARI for analysis. After the material has been excavated and prior to backfill, the hole will be covered with a nonwoven needle punched geotextile or equivalent to prevent erosion. The geotextile will be weighted down with bricks, 6 -inch stone or equivalent equally spaced at a distance of approximately 3 feet. The benefits of this action in addition to meeting the goals include: • Accomplishing the removal during one tidal cycle avoiding working in the wet and potential resuspension of affected sediments.. • Minimizing or potentially waiving permit requirements. • Avoiding the substantial effort increase associated with alternate removal equipment and in -water work that would conflict with the IM goals. Approximately 9 bank yd3 of soil is planned for excavation. A 5 percent weight increase is planned from cement kiln dust (CKD) additive for stabilization. A 20 percent increase in volume is planned for fluffing. Total estimated disposal weight is 16.2 tons. Total volume is estimated at 10 to 11 yd3. 96-885W.DOC 7 29 October 1996 PR10/SEA Plant 2 Duwamish Sediment Interim Measures Work Plan, Outfall 12 and Underflow Flume The upper maximum tonnage of removed soil for this location will be limited to 30 tons (i.e., 20 yards). Decontamination The hoe bucket and thumb will be the only equipment requiring decontamination. The decontamination will be done in the second solo dump truck. The bucket will be brushed clean, detergent wash,;d and solvent rinsed. Solvent rinse will be collected for disposal by Boeing in a separate container. Decontamination brushes, personal protective equipment (PPE), adsorbent booms and silt curtain will be disposed of in the second dump truck. Backfill Backfill will be placed by the excavator. Backfill will consist of 10 tons of riprap (2 -foot minus), and 20 tons of 2 -inch minus crushed rock. The fill will be tested to confirm it is below SQS (WAC 173-204) concentrations. The excavation limits will be backfilled to replace in-kind conditions. The excavator will replace the material cut from the bench in the boat ramp to original configuration. Demobilization Demobilization will occur same day or the following day depending on schedule. 4.2.2 Underflow Flume Plans and Specifications The material to be removed at this location consists of very soft sediment (fine sand and silt) to depths of 1-2 feet. Several methods of removal of this sediment were considered which consisted of 1) a barge mounted dredge, 2) a barge mounted excavator, 3) construction of a wooden boardwalk along the edge of the building for small light weight equipment access, 4) removal with a Super Sucker, 5) removal with a screw conveyor through a hole in the building floor, and 6) removal with manual laborers. It was determined that removal using a Super Sucker is the most optimum method since it would be the quickest, most safe, and likely of least cost. Several sources and vendor contacts have indicated that this equipment has the capability to remove the sediment. The proposed plans are shown in Figure 4. In the event removal rates are too slow using the Super Sucker, an alternate plan using a screw conveyor will be implemented. The conveyor will be positioned through the hole cut in the floor. Sediment will be transferred by the conveyor up to waiting lined trucks. Mobilization The limits of excavation will be measured and staked. The area to be excavated is 12 feet wide by 16 feet long by 2 feet deep. Site preparation includes concrete coring (12 -inch diameter) of the 2- 41 Building floor for vacuum tube/hose access, removal of some sub -floor timbers for worker access, delivery of roll -offs, and delivery of portable Baker or Rain -for -Rent tanks and electric sump pumps. An absorbent pad boom will be placed on flats surrounding excavation area. A silt 96-885W.DOC 8 29 October 1996 PR10/SEA Plant 2 Duwamish Sediment Interim Measures Work Plan, Outfall 12 and Underflow Flume curtain will be installed around the excavation area, keyed into the sediment, and fixed to piling. Work is to be scheduled to be performed on a -1 foot tide day. To provide assurance that the building floor will support the placement of heavy equipment, additional supports or load spreading steel plates will be used. It is anticipated that 2 to 3 exclusion zones will be established for this work. An exclusion zone will be established at the entrance to the access to the impacted sediment. This may be the gate north of Building 2-41, or at the access point from the underbuilding catwalk to the sediment. Another exclusion area may be setup inside the building around the Super Sucker and the Baker tanks used for receipt of liquids. The third exclusion zone may be setup outside the building around the rolloffs used to receive the sediment. Modified level D PPE will be required inside all exclusion zones. A small decontamination station will be setup adjacent to each exclusion zone which will include PPE, a decontamination tub, brushes, disposal bin for used PPE, first aid kit and other supplies. Removal A Super Sucker will mobilize into the building and access sediment with a smooth wall, 6 -inch - diameter vacuum tube, with flex tubing at its end, through the access holes cut in the floor. Laborers will direct the tube and move sediment to it with handtools. A submersible pump will be installed in the excavation and will pump water upward through the floor to the Baker tanks placed in the building. Removal of the excess water will minimize water in the Super Sucker and limit migration of suspended solids from the removal area. Debris (dimensional lumber, tires, flotsam, etc.) will be removed by hand and manually transmitted to roll -offs. Excavation rates are anticipated in the 2 to 4 yards/hour range. Depending on progress, the tides, and schedule, a second Super Sucker can be mobilized. Labor crews will remove sediment to the limits specified by the supervising engineer. If more than one day is required to remove the sediment, the affected area will be covered with a 60 mil nonwoven needle punched geotextile weighted down with equally spaced bricks, 6 inch stones or equivalent between low tides. The weights will be spaced at a maximum distance of 3 feet apart. The geotextile will be placed before the removal area becomes covered with water each day until the area is backfilled with sand. Excavated material will be end -dumped into a low profile mixing tank for stabilization. In the mixing tank, CKD will be added to stabilize the sediment. When the sediment has been stabilized, it will be tested using the paint filter test. The stabilized material will then be loaded into roll offs. The roll offs will be lined with plastic. Plastic will also be placed underneath the roll offs to protect the ground from spillage. It is estimated that two roll offs will be needed. Free water will be pumped from the mixing tank into a baker tank prior to adding CKD stabilization agent. CKD will be provided directly from a cement truck into the mixing tank. The mixing tank will be covered with plastic during CKD placement to minimize air borne dust. Sediment will be stabilized in the mixing tank by backhoe mixing. 96-885W.DOC 9 29 October 1996 PRI O/SEA Plant 2 Duwamish Sediment Interim Measures Work Plan, Outfall 12 and Underflow Flume Demobilization All equipment will be removed from the site and the wooden members replaced under the building overhang. The hole cut in the building floor will be replaced in kind with concrete. 5. OPERATION AND MAINTENANCE Because this is a removal action, no long or short term operation and maintenance requirements are required. 6. MONITORING No long- or short-term monitoring will be performed. 7. SCHEDULE Local permits are anticipated to require 90 days for approval. Shoreline and SEPA permits may require up to 150 days for approval. These approval periods may be shortened depending upon the degree of urgency and cooperation given by the approving agencies. Contractor scope of work development and procurement is estimated to require 45 days. Outfall 12 restoration, mobilization, excavation, and backfill will occur in two days. Equipment demobilization may extend into the next day. The schedule for the underflow flume will initiate when storage racks have been removed. Mobilization/site preparation will take approximately three days. The excavation is scheduled for two days based on an excavation rate of 2 to 4 yards/hour (30 yard maximum). One day of demobilization, which is largely decontamination, is scheduled. Total effort is 6 to 7 days. A preliminary schedule for this work is provided in Figure 5. The work must be scheduled around a minus tide day. 8. INTERIM MEASURE CONSTRUCTION QUALITY ASSURANCE Construction quality assurance requirements will be implemented and verified per the checklist provided in Tables 1 and 2. 9. REPORTING REQUIREMENTS Daily reports will be prepared in the field by the on-site construction engineer during each day work is performed. The reports will be prepared throughout the day and be completed for each day before the construction engineer leaves the site. The reports will be prepared on preprinted 96-885W.DOC 11 29 October 1996 PR10/SEA Plant 2 Duwamish Sediment Interim Measures Work Plan, Outfall 12 and Underflow Flume forms in ink. The reports will be maintained in a dry secure location. The daily reports will include the following information: • Construction engineers name • Date • Tidal information • Weather (temperature, precipitation, other observations) • Equipment On-site • Personnel (contractors, visitors, agency) • Work start and end time • Work performed • Testing/Inspections performed • Problems/Issues • Critical Conversations/Directions Received or Given • Materials brought on-site • Wastes/debris disposed off-site • Other pertinent information (sketches, test data, unknown conditions, etc.) Monthly status reports will be prepared by the construction engineer and submitted to Boeing. Progress updates will be provided to the EPA as requested. 96-885W.DOC 12 29 October 1996 PR1 O/SEA Table 1—Outfall 12 OA Checklist Description Criteria Inspection Method Performed by Approved (initial) 1) Stake Excavation Area +- 2 inches tape measure Construction Engineer 2) Sediment Manifesting NA visual Boeing Representative 3) Spill Prevention place plastic between truck and excavator visual Construction Engineer place CKD in truck bed visual Construction Engineer no free liquid in stabilized soil visual Construction Engineer 4) Sampling 4 samples equally spaced over bottom - field analysis visual Construction Engineer 1 confirmatory sample for lab analysis visual Construction Engineer 5) Decon decon hoe bucket visual Construction Engineer 6) Backfill rip rap - 2' minus visual- verify before shipment to site Construction Engineer crushed rock- 2" minus visual- verify before shipment to site Construction Engineer 7) Excavation depth 2' +- 2 inches measure (tape measure or equiv) 4 corners and 2 location in midsection Construction Engineer 8) Water Quality cover excavation area at days end with geotextile visual Construction Engineer weight down geotextile with brick spaced maximum 3 feet apart. visual Construction Engineer Silt curtain and absorbent boom in place visual Construction Engineer 96-885W.DOC 1 29 October 1996 PR10/SEA Table 2—Underflow Flume QA Checklist Description Criteria Inspection Method Performed by Approved (initial) 1) Stake Excavation Area +- 2 inches tape measure Construction Engineer 2) Sediment Manifesting NA visual Boeing Representative 3) Spill Prevention no leaks in pump/piping visual Construction Engineer place CKD in mixing tank visual Construction Engineer no free liquid in stabilized soil in roll offs visual Construction Engineer verify no leaks in Baker tanks after liquid placement visual Construction Engineer place plastic under roll- off area visual Construction Engineer , 4) Sampling as needed at end of each day - field analysis visual Construction Engineer 1 confirmatory sample for lab analysis visual Construction Engineer sample fill for SQS - lab analysis visual Construction Engineer 5) Decon decon hoe bucket, pumps, tanks, hand tools, super sucker visual Construction Engineer 6) Backfill medium to fine sand- see section 3.2.2 requirements check sieve data Construction Engineer 7) Excavation depth 2' +- 2 inches measure (tape measure or equiv) 4 corners and 2 location in midsection Construction Engineer 8) Water Quality cover excavation area at days end with geotextile visual Construction Engineer weight down geotextile with brick spaced maximum 3 feet apart. visual Construction Engineer Silt curtain and absorbent boom in place visual Construction Engineer 96-885W.DOC 2 29 October 1996 PR10/SEA BOEING PROJECT ENGINEER (Mike Gleason, P.E.) .................................. WESTON PROJECT MANAGER (Larry Vanselow, P.E.) WESTON CONSTRUCTION ENGINEER (TBD) Interim Action Construction Subcontractor Specialty Subcontractor #1 Specialty Subcontractor #2 Sediment ICM Organizational Chart 96-88 W.FIC; SWMU 2-41.33 Deactivated Anodic Tank Lire SWMU 2-41.34 . SWMU 2-41 Quench Tan ABI- 2r41.29 TCE D}greaser d SWMU 2-41.30 Manhole Vault BASEMAP EXPLANATION Facility Boundary • Building N SWMU/AOC Non -Boeing Building // Building Bulkhead/FIII Boundary • Sheet Pile Alignment Storm Drain Bathymetrlc Contour SYMBOL EXPLANATION > 25 ppm PCB DW > 50 ppm PCB DW NOTES 1) Total Dry Weight PCB DATE: October 10, 1996 1266 PM �� ,� JOB NUMBER: 03709.034-143-0010-00 1r 1T��"Y/r� LEADVIEW FGISILE: ANALYST: K. Palmer ' VIEW FILE: drypcbhotpo4s.Wew CHECKED BY: APPROVED BY: Location of PCB Removal Areas EXPLANATION ### SURFACE SAMPLE LOCATION AND CONCENTRATIONS (PPB PCBS) (###) SUBSURFACE SAMPLE LOCATION AND CONCENTRATIONS (PPB PCBS) BOOM SILT FENCE / 12 RAMP TOE MO `- BUILDING EDGE HOTSPOT W100/U4000) EXCAVATIO 1 LIMITS 4800 / TRUCK LOAD AREA 5960 I L -�— baa r� OUTFALL 12 FIGURE 3 OUTFALL 12 REMOVAL EXPLANATION' ### SURFACE SAMPLE LOCATION AND CONCENTRATIONS (PPB PCBS) (###) SUBSURFACE SAMPLE LOCATION AND CONCENTRATIONS (PPB PCBS) SILT FENCE - BOOM - BUILDING EDGE \ RIPRAP 12 9600/(32400) 10,2 UNDERFL❑W FLUME 17,300 H❑TSP❑T EXCAVATION LIMITS COLUMN LINE F FIGURE 4 UNDERFL❑W FLUME REMOVAL 96-885W.flc; 1 February December11112/22112/291 ID Tssk Name Dyreepn 10/6 1W13110/20110/271 11/3 111/10111/17111/24 12/1 112/8ber 1/5 11/12 1/19 1 126 1 2/2 1 2 /16 2/23( 1 Wort* Men Approval 30d 2 Boeing Approval 15d 3 EPA Review 104 4 Finalize 5d 5 Hobos b Proceed Id 6 Permits 72d .. •,. ..... .. : . .. .. ... ....:...::..: 7 Bid Doamw4 PIpersSon 25d 8 Speca/plans 10d 9 Boeing Review 10d 10 Revrse/Approval Sd 11 Weston Subcontracting 10d 12 Outset 12 Sediment Id 13 MobExcavatarbacMW Id 14 Fkrnm Sediment 124 15 Mobilize 3d 16 Remove Sediment 2d 17 oackttli Id 16 Demobilize Flume Site Equ Id Task Rolled Pry' Summary 91111.11111111111111. Up Progress Progress IIIIIIIIIIIIIIIIIIIIIMIN Deb: Tue 10/8/96 Rolled Up Task Mission° . Rollad Up Milesbn° O , 7- .a r -F167- MkNAGERS Eusysrrs ICM Schedule Figure 5 96-885W.flc; CITY OF TUKWILA DEPARTMENT OF COMMUNITY DEVELOPMENT 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 AFFIDAVIT OF INSTALLATION AND POSTING OF PUBLIC INFORMATION SIGNS) State of Washington County of King City of Tukwila RECEIVED DEC 1 9 1996 COMMUNITY DEVELOPMENT I CA) -11-1-1A- K RA -Ng- (Print Name) understand that Section 18.104.110 of the Tukwila Municipal Code requires me to post the property no later than fourteen (14) days following the issuancd-of the Notice of Completeness. I certify that on 12c. 18,1'341G the Public Notice Board(s) in accordance with Section 18.104.110 and other applicable guidelines were posted on the property located at 16' Ave. so as to be clearly seen from each right -of -way providing primary vehicular access to the property for application file number E b- 0036, L 9 b -00 31 0, el - Affiarit (Applicant Signature) SUBSCRIBED AND SWORN to before me this J day of IL , 19 q 6 NOTARY PUBLIC in and for the State of Washington residing at .� My commission expires on nelie v. 02.1 1 ?q CITY OIUKWILA Department of Community Development 6300 Southcenter Boulevard, Tukwila, WA 98188 Telephone: (206) 431-3670 NOTICE OF APPLICATION The Boeing Company has filed application for removal of PCB contaminated soil at Duwamish outfall #12 and beneath building 2-41 located at 7755 East Marginal Way in the City of Tukwila. Work will include excavation of concrete and soil and replacement with clean fill. An environmental checklist has been submitted. Other known required approvals include: U.S. Environmental Protection Agency Washington Department of Fisheries and Wildlife The project files are available at the City of Tukwila. To view the files, you may request them at the permit counter of the Department of Community Development (DCD), located at 6300 Southcenter Boulevard #100. Project Files include: E96-0036 SEPA Checklist L96-0081 Shoreline Permit Exemption Request Your written comments on the project are requested. They must be delivered to DCD at the • address above or postmarked no Tater than 5:00 p.m., December 23, .1996. You may request a copy of any decision, information on hearings, and your appeal rights by calling DCD at 431-3670. The environmental review decision is appealable to the City Council. For further information on this proposal, contact Nora Gierloff at 431-3670 or visit our offices at 6300 Southcenter Boulevard, Suite #100, Monday through Friday, 8:30 a.m. to 5:00 p.m. Application Filed: December 6, 1996 Notice of Application Issued: December 9, 1996 SWMU 2-41.33 Deactivated Anodic SWMU 2-41.30 Manhole Vault SWMU 2-41.3 Machine Pits BASEMAP EXPLANATION Facility Boundary N Building N SWMU/AOC Non -Boeing Building 't // Building Bulkhead/FIII Boundary At Sheet Pile Alignment Storm Drain /AV Bathymetric Contour SYMBOL EXPLANATION I > 25 ppm PCB DW > 50 ppm PCB DW NOTES 1) Total Dry Weight PCB WON ,AM06 WAS/CC UI IS DATE: October 10, 1896 1266 PM JOB NUMBER: 03709.034-143-0010.00 LEAD GIS ANALYST: K. Palmer VIEW FILE: drypcbhotpote.vlew CHECKED BY: APPROVED BY: Location of PCB Removal Areas