Away .I 3020 Bozeman Avenue consulting scientists and engineers Helena, MT 59601 (406) 443-4150 Fax: (406) 443-4155 January 27, 2015 SENT VIA EMAIL ONLY Mr. Joe Harrison Project Manager Point Ruston, LLC 5212 N. Shirley St. Tacoma, WA 98407 jmharrisonl 950@yahoo.com RE: Propane Piping Installation for Building 2A and 2B, 5005 Main Street Dear Mr. Harrison: Per your request, I am writing this letter regarding the installation of the Propane Piping for Building 2A and Building 2B that Hydrometrics Quality Assurance/ Quality Control on?site personnel, Adam Jourdonnais, witnessed and documented while conducting inspections for Remedial Action on the Point Ruston Site. Hydrometrics role in this project was to document Remedial Action construction as it relates to the Final Remedy described in the Final Statement of Work (SOW) for the Commencement Bay Nearshore/Tide?ats Superfund Site Operable Unit 02 and Operable Unit 06 (EPA, 2005 and EPA, 2006). The Final Remedy includes installation of utility systems in clean utility corridors, which Hydrometrics documented in Daily Construction Reports and As-Builts of the Site, to be included in the Final Remedial Action Construction Report for each Phase of Construction at the Site. While on-site, Hydrometrics personnel witnessed and documented contractors performing work on the Propane Piping for Building 2A and Building 2B and air testing conducted as part of the propane piping installation. The following discusses the items witnessed by Hydrometrics, which are reported in the Daily Reports (Exhibit A) and re?ected on the general Site location As-Builts for Remedial Action (Exhibit B). Utility Installation Olson Brothers Excavating installed a 3-inch diameter Yellow HDPE pipe in a clean utility trench shared with the water main. The clean utility trench is constructed by excavation and removal of contaminated site soils, installation of a non-woven geotextile marker layer on the trench bottom and trench walls, at the use of imported back?ll in the trench meeting the Remedial design speci?cation for clean import. Based on as-built engineering surveys, the HDPE propane pipe was installed approximately 1.5 to 2 feet away from the water main and had approximately the same crown elevation as the water main. The crown of the HDPE propane pipe is approximately 2.5 feet below the ?nish grade of the asphalt pavement placed above it, based on engineering as-built surveys. Back?ll for pipe zone bedding (WSDOT Speci?cation 9- was placed above and below the HDPE propane pipe and haunched around the pipe barrel by a shovel (WSDOT, 2012). Clean back?ll for walls (WSDOT Speci?cation was used as trench back?ll above the pipe zone bedding and was compacted using a vibratory hydraulic plate compactor (WSDOT, 2012). During installation it was noted that the subcontractor DM Kelly used an electrofusion coupler to join pipe segments. Pressure Testing 3? HDPE Propane Line Hydrometrics personnel witnessed and recorded the pressure testing of the propane lines installed to Building 2A and Building 2B on 3/7/2013 and can report the procedure witnessed and the test results. Olson Brothers Excavating pressurized each line to 60 psi and allowed the pressure to stabilize for 42 minutes for the Building 2A line and 30 minutes for the Building 2B line. Pressure in each line was then reduced to 50 psi and a test was run for 10 minutes. A PASCO pressure gauge with 2 psi increments was used for the test. Neither line showed a drop Sincerely, \jy Gregory Lorenson, P.E. References US EPA, 2005. Final Statement of Work (SOW) for the Commencement Bay Nearshore/Tide?ats Superfund Site Operable Unit 02. US EPA, 2006. Final Statement of Work (SOW) for the Commencement Bay Nearshore/Tide?ats Superfund Site Operable Unit 06. WSDOT, 2012. ?2012 Standard Speci?cations for Road, Bridge, and Municipal Construction.? Washington State Department of Transportation. Exhibit A Daily Reports and Pressure Testing Documentation HYDROMETRICS DAILY CONSTRUCTION REPORT Date: February 18. 2013 Hydrometrics Personnel: Adam Jourdonnais Project: Phase 1 Construction Project No.: 1100] Client: Point Ruston. LLC Contractor: Olson Brothers Excavating DM Kellv Weather: Overcast Temperature Hi 47 Lo 36 Wind: Calm Precipitation None AVERAGE FIELD FORCE Name Company No. of Remarks Men on Project Olson Brothers 10 Wet Utility Installation DM Kelly 2 Propane Line Coupling OTHER PERSONNEL Time Name Duties Remarks 07:30 Adam Jourdonnais QA Oversight Erik Berg EPA Oversight CONSTRUCTION ACTIVITIES Wet Utility Installation 07:30 to 16:00 Olson Brothers continues installation of storm and water utility piping in the alley between Buildings 2A and 2B. 86 linear feet of 8-inch diameter PVC storm sewer pipe was installed with [50 linear feet of 6-inch diameter laterals for ?iture connections to cleanouts and 80 linear feet of 4?inch diameter laterals to ?sture roof drains. Additionally, a Type I catch basin for Yard Drain #9 was set (See Photo 1). Drain pipes were connected to the northwest, southwest, and southeast faces of the structure by sand collar boots. 98 linear feet of 4-inch diameter ductile iron water main encased in an 8-mil polyethylene wrap was installed for water service to Building 28. Nitrile rubber gaskets were used in the bell end of each ductile iron pipe segment to join pipe sections. The water and storm drain lines were installed in the same trench. Non-woven geotextile marker layer was placed in the trench bottom and up the side walls to a minimum 2-foot overlap of existing grade. Where the trench ran next to the existing sanitary sewer trench, marker layer was tied in to the existing. Excavated waste soil was hauled to the location of the Yacht Club Road extension and stockpiled for ?iture use as embankment ?ll. Gravel back?ll for pipe zone bedding was placed and minimum of 8-inches above and below each utility line and haunched around the pipe Randal-Phase ConstructionlConstruction Reporls\Daily Construction Report 2-18-13 -Phasc 25- 3'-034 2325- l3 2:06 PM barrels by shovel. Clean gravel back?ll for walls was used as trench back?ll for completed utility portions and compacted with a vibratory hydraulic plate. Utility Installation 07:30 to 16:00 Olson Brothers installs 200 linear feet of 3-inch diameter I-IDPE pipe for propane service to Buildings 2A and ZB (See Photo 2). The propane line was installed in an existing clean utility trench above water and irrigation lines. DM Kelly used an electro?ision coupler to join pipe segments. Photo 1 - Installation of YD Ruslon?tPhasc Construction'LConstruclion Reporls?LDaily Construction Report 2-18-13 -Phase 2:251} 2'06 PM . 'u'rJl} . . 3 Ruslon?sPhase Reportsanin Construction Repon 2-18-13 3 2 06 PM HYDROMETRICS DAILY CONSTRUCTION REPORT Date: Februarv 21. 2013 Hydrometrics Personnel: Adam Jourdonnais Project: Phase I Construction Project No.: 1100] Client: Point Ruston. LLC Contractor: Olson Brothers Excavating Tvee Concrete Holrovd JM Com Weather: Overcast Temperature Hi 46 Lo 41 Wind: Breezv Precipitation Intermittent Light Rain AVERAGE FIELD FORCE Name Company No. of Remarks Men on Project Olson Brothers 9 Wet Utility Installation Tyee Concrete 5 Concrete Holroyd Concrete Supplier AR Testing 1 Concrete QC JM Corp 2 Street Light Bases Drain-Pro 1 Light Base Excavation DM Kelly 1 Propane Line Coupling OTHER PERSONNEL Time Name Duties Remarks 07:30 Adam Jourdonnais QA Oversight Janice Horton EPA Oversight Karen Pickett EPA Oversight CONSTRUCTION ACTIVITIES Wet Utility Installation 07:30 to 16:00 Olson Brothers continues installation of storm and water utility piping southeast of Building 2A (See Photos 1, 2 and 3). The cast Bay?lter vault was set at N: 722730.68; E: 114358507. 80 linear feet of 6-inch diameter PVC storm sewer pipe was installed to connect an existing Building 2A roof drain line to Yard Drain #12, to connect existing pipe ?'om YD #11 to the east Bay?lter vault, and to connect the Bay?lter vault to Yard Drain #12. Kor-N-Seal boots were used for connections to the southwest and northeast sides of the Bay?lter vault, and sand collar boots were used for two connections to the southwest face of Yard Drain #12. 33 linear feet of 4?inch diameter ductile iron water main encased in an 8-mil polyethylene wrap was installed between a water meter vault on the southeast side of Building 2A and a connection to the building. Nitrile rubber gaskets were used in the bell end of each ductile iron pipe segment to join pipe sections. The water and storm lines were installed in separate trenches. Non-woven geotextile marker layer was placed in each trench bottom and up the side walls to a minimum 2-foot overlap of existing grade. Where the trenches ran next to the existing sanitary sewer trench, marker layer was Ruston'iPhnse Construction Report 2-2i-13 -Phase 2.27. 13 4'34 PM tied in to the existing. Excavated waste soil was hauled to the location of the Yacht Club Road extension and stockpiled for ?lture use as embankment ?ll. Gravel back?ll for pipe zone bedding was placed a minimum of 8-inches above and below each utility line and haunched around the pipe barrels by shovel. Clean gravel back?ll for walls was used as trench back?ll for completed utility portions and compacted with a vibratory hydraulic plate. Utilitv Installation 07:30 to 16:00 Olson Brothers installs 90 linear feet of 3-inch diameter pipe for propane service to Buildings 2A and 2B (See Photo 4). The propane line was installed in an existing clean utility trench above water and irrigation lines. DM Kelly used an electro?tsion coupler to join pipe segments. Street Light Base Installation 07:30 to 16:00 Drain-Pro on-site to excavate for street light foundations with an eductor truck. Following excavation, JM Corp begin installing sonotube forms, reinforcing steel, and PVC electrical conduit for the street light foundations. PCC Cap Placement 08:00 to 17:00 Tyee Concrete places low permeability concrete (Holroyd Mix ID: 6551FB2) to a depth of 4-inches for the main and vehicle entrances to Building 2A (See Photo 5). Prior to concrete placement, existing waterproo?ng membrane on the Building 2A foundation wall was removed to a minimum of lZ-inches below ?nish grade of the slab (See Photo 6) #3 steel reinforcement bar was installed with 10-inch center-to-center spacing in both directions and placed on brick chairs to provide proper clear cover above the subgrade. Expansion joints consisting of asphalt expansion board with a G-Seal cap, isolation joints consisting of asphalt board with a recessed cap to be ?lled with Dymonic FC sealant, and tooled contraction joints which will also be ?lled with Dymonic FC sealant were installed in accordance with the project plans and speci?cations (See Photos 7, 8 and 9). Concrete slump (4.5-inches) and air entrainment content were tested met project speci?cations. Test cylinders were cast for determination of 28-day compressive strength of the concrete. Rustoml?hasc I Construcnon-Construction Reports'tDaily Construction Report 2-21-13 -Phase l3\034 13 4 34 PM 1" l- 1 -J-. ht - Stor Sewer nstalltion. Photo 2 Bay?lter Vault after lnsallation. RuslonWhase I Construction\Construction Reponsmnily Report 2-21-l3 -I?hasc l3?k034 2527113 4:34 PM q- 7 Photo 4 Elecrofusion Weling HDPE Prop Line. Ruslon?d?hasc Construction Report 2-2l-13 -Phasc 2:27:13 4:34 PM 1.. Photo 5 PCC Cap Placement. Photo 6 - Removal of Waterproo?ng Membran on Building Foundation. Ruston?d?hasc I Construction'nConstruclion Reports?anily Construction Report 2-21-13 -l?hasc 2:27:13 4:34 PM Photo 7 Typical Expansion Joint. Photo 8 Typical Isolation Joint (Prior to S?algnt I'Application). Ruston?lPhasc Constructionl-Construclion Reponsmaily Construction Report 2-2l-l3 -Phasc 2527-13 4:34 PM Photo 9 Typical Contraction Joint (Prior to Sealant Application). Ruston?tPhase I Reporls?LDaily Construction Repon 2-2l-l3 29'2'h?13 4'34 PM HYDROMETRICS DAILY CONSTRUCTION REPORT Date: February 22. 2013 Hydrometrics Personnel: Adam Jourdonnais Project: Phase I Construction Project No.: 11001 Client: Point Ruston. LLC Contractor: Olson Brothers Excavating MC Construction Weather: Overcast Temperature Hi 48 Lo 38 Wind: Breezv Precipitation Rain AVERAGE FIELD FORCE Name Company No. of Remarks Men on Project Olson Brothers 9 Wet Utility Install MC Construction 4 Sidewalk Prep Drain-Pro 1 Light Base Excavation JM Corp 2 Sonotube Installation OTHER PERSONNEL Time Name Duties Remarks 07:30 Adam Jourdonnais QA Oversight Janice Horton EPA Oversight CONSTRUCTION ACTIVITIES Wet Utility Installation 07:30 to 16:00 Olson Brothers continues installation of storm and water utility piping southeast of Building 2A (See Photos 1 and 2). 26 linear feet of 6-inch diameter PVC storm sewer pipe and 14 linear feet of 4-inch diameter PVC laterals were installed to connect Building 2A roof drains to the storm drainage system. A segment of storm drain pipe penetrated the planter wall on the southeast side of Building 2A. Volclay waterstop was placed around the pipe and the core drilled wall penetration (See Photo 3). Non-shrink grout was then placed in the annulus between the pipe and the core drill (See Photo 4). Additionally, a storm ?lter cartridge and associated plumbing was installed in the east Bay?lter vault (See Photo 5). 31 linear feet of 4-inch diameter ductile iron water main encased in an 8-mil polyethylene wrap was installed between a water meter vault on the southeast side of Building ZB and existing pipe connected to the building. Nitrile rubber gaskets were used in the bell end of each ductile iron pipe segment to join pipe sections. Water and storm sewer pipes were both installed in clean trenches above existing maker layer. Gravel back?ll for pipe zone bedding was placed a minimum of 8-inches above and below each utility line and haunched around the pipe barrels by shovel. Clean gravel back?ll for Ruslon?il?hase I Repmr-Dally Construction Report 2-22-13 -Phase 131034 2?27 13 4:59 PM walls was used as trench back?ll for completed utility portions and compacted with a vibratory hydraulic plate (See Photo 6). Sidewalk Preparation 07:30 to 16:00 MC Construction continues subgrade preparation for sidewalks along the south side of the Building 2A access road (See Photo 7). Woven geotextile marker layer is placed over existing waste soil and covered with aggregate for gravel base to a depth of 8- inches. A plate compactor is used to compact the material. Streetlight Base Installation 07:30 to 16:00 Drain-Pro continues using an eductor truck to excavate for street light foundations (See Photo 7). Following each excavation, JM Corp installs sonotube forms, reinforcing steel and PVC electrical conduit. - .. . . I Phto 1 - Stor Sewer nstallation. I Ruston'tl?hase I Reports\Daily Construction Report 2-22-13 -Phase I 2322-13 4:59 PM . ~d - Wate Photo 3 Volclay Waterstop Installation. Ruslon?tPhase I Reports?xDaily Construction Report 2-22-13 -Phase l3\034 4:59 PM L, I I . k3. . Photo 5 - Bay?te Caidge Istalation. Ruslon?J'hasc I Construction Report 2-22-13 -Phasc 162?! [3 4:59 PM I ?nu-tut Ll 1 . 1 Photo 6 Back?ll Placeen. RustonWhasc I Construction?Construction qurts?LDally Construction Report 2-2243 -Phase 3 \034 252?: [3 4:59 PM Print Page 1 of 1 Subject: RE: Propane Pressure Tests From: Adam Jourdonnais To: jmharrison1950@yahoo.com; Cc: hydrometrics.com; Date: Friday. December 19, 2014 7:13 AM Jae, Pressure testing of the propane lines for 2A and 28 was conducted on [just have the notes from my ?eld book and a few pictures which are attached. Building 2A Line was pressurized to 60 psi and allowed to stabilize for 42 minutes from 10:05a to 10:47a. Pressure in the line was reduced to 50 psi and the test ran for 10 minutes from [0:543 to 1 1:04a. Building 23 Line was pressurized to 60 psi and allowed to stabilize for 30 minutes from 10:59a to 11:29a. Pressure in the line was reduced to 50 psi and the test ran for 10 minutes from 1 1:29a to 1 13%. Adam From: Joe Harrison Sent: Friday, December l9, 20l4 7:06 AM To: Adam Jourdonnais Subject: Propane Pressure Tests Good morning, Could you forward the pressure test results for 2A ZB Probably mid February 2013 Thank you 12? 1 9f2014 .I . .a . . LUMTJWI j. 5. I .3 it Exhibit As-Built Location Drawing - LL .LL . th-t?c-L- -- .. -1 'l TANK PAD bi?L-?m SCALE [In 2.0 20 4'0 60 LEGEND In EXISTING 3'0 HOPE PROPANE SERVICE LINE - I JOINT UTILITY CORRIDOR STORM SEWER EXISTING SRNITARY SEWER EXISTING WATER DISTRIBUTION EXISTING UTILITY VAULT EXISTING PVC PROPANE SLEEVE NO av mm: DESCRIPTION I no BY mm; Projch Nu. r0 etri cs I POINT RU DRAWING FILE NUMBER r; w: m- I. .. - Ara-v I mowsumoyaormrs .. INN- Consuiting scientists and Engineers Atmx mam IE I CHECKED In SHEET NUMBER REV it? NOT one INCIIDN -: - ?3 5 THIS SHEET ADJUST ""?S?Sn?m?f?mim? EXISTING UTILITIES 1 I SCALES ACCORDINGLY AS NOTED ?mm'n mun-nan