former waste reclamation area, roundhouse/shops … · (golder, 2013 defining data gathering...

SOIL RESPONSE ACTION COMPLETION REPORTFORMER WASTE RECLAMATION AREA, ROUNDHOUSE/SHOPS AREA

(VIC Program Site ID VP5080)/ Soo Line (SR380)

SHOREHAM YARD 2800 CENTRAL AVENUE NE MINNEAPOLIS, MINNESOTA

Submitted To: Minnesota Pollution Control Agency Voluntary Investigation and Cleanup Unit 520 Lafayette Road North St. Paul, Minnesota 55155-4194

Submitted By: Golder Associates Inc. 1751 W. County Road B, Suite 105 Roseville, MN 55113 USA

On behalf of Soo Line Railroad Company d/b/a Canadian Pacific Canadian Pacific Plaza 120 South 6th Street, Suite 900 Minneapolis, Minnesota 55402

Distribution:

2 Copies/2 CD Minnesota Pollution Control Agency 1 Copy Canadian Pacific 1 Copy City of Minneapolis 1 Copy Stinson Leonard Street (electronic) 1 Copy Ashland (electronic) 1 Copy Integral Consulting (electronic) 1 Copy Shoreham Area Advisory Committee (notification) 1 Copy Golder Associates Inc.

June 30, 2015 Project No.: 023-6105.015

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TABLE OF CONTENTS 1.0 INTRODUCTION .............................................................................................................................. 1

1.1 Background ......................................................................................................................... 1 1.2 Project Participants ............................................................................................................. 2 1.3 Project Schedule ................................................................................................................. 2

2.0 DECOMMISSIONING ACTIVITIES ................................................................................................. 3 2.1 Roundhouse/Shops Area SVE Decommissioning Process ................................................ 3

2.1.1 Condensate, Oil, Air Filters, Carbon ...................................................................... 3 2.1.2 Electrical Service.................................................................................................... 4 2.1.3 Buildings and System Equipment .......................................................................... 4 2.1.4 Concrete Slabs and Barriers .................................................................................. 5 2.1.5 Conveyance Piping ................................................................................................ 5 2.1.6 Conveyance Pipe Supports and Fencing .............................................................. 5 2.1.7 SVE Wells, Vacuum Monitoring Probes, Soil Gas Borings ................................... 6 2.1.8 Phone Line ............................................................................................................. 6

2.2 Former Waste Reclamation Area SVE Decommissioning Process .................................... 6 2.2.1 Condensate, Oil, Air Filters, Carbon ...................................................................... 6 2.2.2 Electrical Service.................................................................................................... 7 2.2.3 Building and System Equipment ............................................................................ 7 2.2.4 Concrete Slabs....................................................................................................... 8 2.2.5 Conveyance Piping ................................................................................................ 8 2.2.6 Conveyance Pipe Supports and Fencing .............................................................. 8 2.2.7 SVE Wells, Vacuum Monitoring Probes, Soil Gas Borings ................................... 8

3.0 FORMER WASTE RECLAMATION AREA SHALLOW SOIL EXCAVATION ................................. 9 3.1 Excavation Activities ........................................................................................................... 9

3.1.1 Soil Pre-characterization ........................................................................................ 9 3.1.2 Soil Excavation/Disposal ........................................................................................ 9

3.2 Back-Filling Activities ........................................................................................................ 10 3.2.1 Excavation Back-Filling ........................................................................................ 10 3.2.2 Survey .................................................................................................................. 10

4.0 HEALTH AND SAFETY ................................................................................................................. 11

5.0 CONSTRUCTION DOCUMENTS .................................................................................................. 12 5.1 Project Meetings ............................................................................................................... 12

5.1.1 Weekly Progress Meetings .................................................................................. 12 5.1.2 Daily Safety and Activity Preparation Meetings ................................................... 12

5.2 Reports .............................................................................................................................. 12 5.2.1 Daily Field Reports ............................................................................................... 12 5.2.2 Weekly Construction Meeting Reports ................................................................ 12 5.2.3 Photographic Record Documentation .................................................................. 12

6.0 POST-DECOMMISSIONING ACTIVITIES .................................................................................... 13 6.1 Soil Vapor Monitoring ........................................................................................................ 13

7.0 CERTIFICATION STATEMENT ..................................................................................................... 14

8.0 REFERENCES ............................................................................................................................... 15

List of Tables Table 1 Soil Gas Analytical Results

g:\projects\2002 projects\023-6105 cpr\sve decommissioning\completion report\final to mpca 06-30-2015\completion report_mpca_06-30-2015.docx

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List of Figures Figure 1 Site Location Map Figure 2 Former SVE Systems Layout

List of Appendices Appendix A As-Built Survey of Excavated Area & Backfill Appendix B Photographs


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1.0 INTRODUCTION Golder Associates Inc. (Golder) is pleased to submit this Soil Response Action Completion Report

(Report) to the Minnesota Pollution Control Agency (MPCA) documenting the decommissioning of the

Roundhouse/Shops Area soil vapor extraction (SVE) system, the former Waste Reclamation Area SVE

system and shallow soil excavation in the former Waste Reclamation Area at the Shoreham Yard facility

in Minneapolis, Minnesota (Site) (Figure 1). Activities included:

Decommissioning 30 SVE wells

Decommissioning 39 SVE monitoring probes

Removal of vapor conveyance piping and pipe supports

Removal of SVE treatment equipment

Removal and disposal of concrete slabs associated with the SVE buildings and equipment

Excavation and disposal of shallow, impacted soil in the former Waste Reclamation Area

Restoration of at-grade surfaces

This Report describes the project background, pre-construction permitting, procurement, and field

implementation of the decommissioning and excavation activities. Appendices contain supporting

documentation and photographs.

1.1 Background Pursuant to the approved Response Action Plan for the East Side Shoreham Facility (Golder and

Geomega, 2005) CP operated SVE systems at the Roundhouse/Shops Area and the former Waste

Reclamation Area at the Site from 2007 to 2013 (see Figure 2). Based on SVE system performance data,

a Confirmation Soil and Soil Gas Sampling Work Plan (Golder, 2013) defining data gathering activities to

confirm that cleanup goals had been met, was submitted to MPCA on September 30, 2013. Following

MPCA approval on October 21, 2013, soil and soil gas confirmation sampling were conducted between

November 13 and 26, 2013. Results of the sampling were documented in the Response Action

Implementation Report (RAIR), (Golder, 2014a). The RAIR recommended decommissioning the SVE

systems and completion of a shallow soil excavation in the Former Waste Reclamation Area to complete

the soil response action. The RAIR was submitted to the MPCA on May 28, 2014, and was approved by

the MPCA on July 17, 2014.

The RAIR documented concentrations of trichloroethene (TCE) and tetrachloroethene (PCE) detected in

shallow soil (0-4 feet below ground surface) in borings SB13-21 and SB04-82, located within the Former

Waste Reclamation Area. The approved RAIR proposed further delineation of these impacts which was

conducted in accordance with a Soil Delineation Work Plan, Former Waste Reclamation Area (Golder,

2014b).


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Delineation activities were conducted from July 21 to 22, 2014 and included twenty-five (25) soil borings

advanced by Stevens Drilling & Environmental Services (SDE) to a depth of 4 feet below ground surface

using direct push method. Each continuous sample core was screened with a calibrated photoionization

detector (PID) equipped with a 10.6 eV lamp, and the soil horizon that exhibited the highest organic vapor

concentration was sampled with Terracore® soil samplers. If no elevated PID readings were detected, a

discrete sample was taken at mid depth. Samples were packed on ice and transported to Pace Analytical

in Minneapolis, MN for delivery to Pace Analytical, Green Bay, Wisconsin, for volatile organic compound

(VOC) analysis by the United States Environmental Protection Agency (USEPA) method 8260.

Based upon evaluation of the soil sampling results, a proposed excavation area was defined and

presented in a Work Plan, Decommissioning of Soil Vapor Extraction Systems and Former Waste

Reclamation Area Soil Excavation (Golder, 2014c) (Work Plan). The Work Plan also described activities

necessary to complete the decommissioning of the Roundhouse/Shops Area SVE and the former Waste

Reclamation Area SVE systems. This Work Plan was submitted to the MPCA on August 27, 2014, and

approved on September 3, 2014.

At the direction of CP, Golder commenced contractor procurement activities and prepared bid documents.

Golder issued bid documents to three (3) local contractors on August 27, 2014. Upon review of proposals

submitted by the bidders, and in consultation with CP, SDE was contracted for decommissioning and

excavation activities.

1.2 Project Participants Golder was retained by CP to provide construction management services throughout the permitting,

procurement and construction phases, including construction monitoring. In addition to SDE and its

subcontractors, the following entities also participated in the project:

Evoqua Water Technologies (Evoqua) removed spent granular activated carbon from the four (4) SVE treatment vessels and transported the carbon to Covanta Hennepin Energy Resource Co. (Covanta) for thermal destruction.

Fraser-Morris Electric (FME), disconnected electrical service to SVE components that were to be removed and identified components that were to remain for subsequent use by CP. CP’s contractor, West Central Environmental Consultants (WCEC), disposed condensate water from the condensate collection tank located in the WR SVE System Building. CP’s contractor, Midwest Specialized Transportation (MST), transported the WR SVE System Building and the RH SVE System Building to CP rail yards in Hastings, MN and St. Paul, MN, respectively.

1.3 Project Schedule SVE system decommissioning activities commenced on October 20, 2014 and concluded on November

14, 2014, and are described further in Section 2. Soil excavation activities were completed between

November 6, 2014 and November 13, 2014, and are described in detail in Section 3.


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2.0 DECOMMISSIONING ACTIVITIES Prior to land disturbance activities, a Soil Erosion Application was submitted to the City of Minneapolis.

The City issued a Soil Erosion Permit on September 9, 2014 (Permit Number BESE 1007116). Golder

prepared an Erosion and Sedimentation Control Plan, Shallow Soil Excavation and Concrete Pad

Removal, (Golder, 2014d) to identify the erosion control requirements for the work.

SDE coordinated the location of buried utilities through Gopher State One Call. The locator for

Centerpoint Energy identified and marked a buried high pressure gas main in the Shops Area. Golder

notified CP’s Call Before You Dig to identify signals and communications equipment that may be in the

work areas; none were identified. SDE sub-contracted a private locator, Hance Locating, to locate

electrical services in the area surrounding the RH SVE Systems Building and RH Valve House.

SDE utilized multiple roll-off containers for segregating and accumulating waste generated throughout

SVE decommissioning activities. Roll-offs were designated for metals, general demolition debris, and

concrete with and without reinforcement.

Recyclable metal waste such as steel pipe, fence posts, barbed wire, conveyance pipe supports, brass

valves, hardware, filter housings, air-water separators, and electrical conduit were transported by SDE to

either the Northern Metals Recycling (NMR) or Re-Alliance recycling facilities in Minneapolis, MN.

Non-recyclable debris such as polyvinyl chloride (PVC) pipe, insulation, PVC valves, tubing, and gauges

were placed in designated roll-off containers and transported by SDE to the Vonco II Landfill located in

Becker, MN for disposal.

Concrete that was free of reinforcing steel bar (rebar) or other foreign material was transported by SDE to

Bursch Brothers Gravel of Hanover, MN for recycling. Concrete with reinforcement was transported by

SDE to Barton Gravel of Maple Grove, MN for recycling.

2.1 Roundhouse/Shops Area SVE Decommissioning Process

2.1.1 Condensate, Oil, Air Filters, Carbon Prior to initiating equipment removal, oil was drained from the two (2) SVE blowers located in the RH SVE

System Building. Used oil was placed in CP’s designated on-Site used oil receptacle for recycling. The

in-line particulate filter and dilution-air particulate filter from the RH SVE System Building were removed

and disposed in CP’s on-Site general trash dumpster. The polyethylene condensate collection tank

located in the RH SVE System Building was also confirmed as empty.

Evoqua, CP’s designated carbon supplier, removed approximately 20,000 pounds of granular activated

carbon from the two (2) RH SVE carbon vessels on October 29 and 30, 2014. Carbon from the RH SVE


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filled a total of fifteen (15) super sacks. Evoqua transported the super sacks to Covanta of Minneapolis,

MN to be incinerated.

2.1.2 Electrical Service CP’s contractor, FME, disconnected electrical service to the Shops Area Valve House and the RH SVE

System Building. Electrical service to the RH Valve House was retained for CP to re-purpose the building

in its current location. Electrical components left intact within the buildings included:

Electrical panels

Transformer

Electrical wall outlets

Lighting, heaters

Exhaust fans

Associated conduit and switches

2.1.3 Buildings and System Equipment SDE removed all SVE equipment from inside of the Shops Area Valve House, RH Valve House, and RH

SVE System Buildings, with the exception items noted in Section 2.1.2. The two (2) SVE blowers, blower

motors, and silencer assemblies were removed intact and transported the SDE’s shop to be salvaged or

disassembled for recycling.

SDE used potable water to rinse the interior of the two (2) Roundhouse carbon vessels and the

Roundhouse polyethylene condensate tank. Rinse water was collected and stored in two (2) 55 gallon

drums. The drums of rinse water were transported off-Site by SDE on November 13, 2014 for disposal at

a Metropolitan Council Environmental Services facility. The carbon vessels and the polyethylene tank

were transported to SDE’s facility for salvaging or recycling.

Metal components such as steel pipe, filter housings, air-water separator, conduit, and brass valves were

placed in a roll-off container designated for recyclable metals. All other debris such as PVC pipe and wall

insulation was placed in a roll-off designated for general demolition debris.

After all interior and exterior SVE components were removed, the intact RH SVE System Building was

hoisted by a crane operated by SDE’s subcontractor, Mid-State Crane (MSC) and placed on a flat-bed

semi-trailer on November 7, 2014. On November 11, 2014, MST transported the building by semi-trailer

to CP’s St. Paul rail yard. The Shops Area Valve House was moved to an on-Site staging area on the

east side of the Roundhouse. The RH Valve House was left in place with electrical service intact to be re-

purposed by CP.


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2.1.4 Concrete Slabs and Barriers After removal of the RH SVE Systems Building and external equipment, the reinforced concrete slabs that

served as building and equipment foundations were removed. Two (2) skid steer mounted jack-hammers

were used and attempts were made to separate the concrete from rebar. Progress was impeded due to

the concrete slab’s thickness, and SDE opted to use an excavator bucket to break up the slab and load

the conjoined concrete and rebar into the appropriate roll-off for recycling.

After the concrete pads were removed, Miller Trucking delivered approximately 25 tons of class 5

aggregate, to restore the excavated pad areas to grade.

Concrete barriers previously utilized around the RH SVE System area to protect SVE monitoring probes

and/or support for conveyance piping were left in place, as directed by CP.

The Shops Valve house was located on a pre-existing concrete slab that was left intact.

2.1.5 Conveyance Piping Above-grade conveyance piping leading from vapor extraction wells to the RH Valve House consisted of

4-inch diameter PVC pipe wrapped with heat-trace, insulation and metal jacketing. Using a reciprocating

saw, SDE cut piping into sections and placed the sections into the general demolition debris roll-off.

Below-grade piping between the Shops Valve House and the RH Valve House was grouted with neat

cement using a piston grout pump and tremie pipe. The condensate sump associated with the below-

grade conveyance pipe was cut off approximately 1-foot below grade and grouted with neat cement.

2.1.6 Conveyance Pipe Supports and Fencing Black iron pipe support cross members were unbolted from vertical, galvanized steel support posts and

placed in the roll-off designated for recycling. Vertical support posts in the Shops Area and some support

posts along the east side of the Roundhouse were threaded into bases that were anchor-bolted onto

previously existing concrete slabs. SDE unbolted the bases from the concrete slabs and placed the

conjoined pipe supports and bases into the appropriate recycling roll-off. Remaining bolts were cut flush

with the existing ground surface. Elsewhere, poured concrete stabilized the vertical posts. Concrete

embedded posts were pulled out of the ground using a skid-steer mounted fence-post puller. SDE used a

jack-hammer to separate posts from concrete and the materials were placed in the appropriate roll-off

containers for recycling. Post holes were back-filled with class 5 aggregate.

While removing concrete embedded support posts in the vicinity of monitoring point VEW06-98-CA10,

SDE personnel detected a petroleum odor. These posts were staged on, and covered by, poly sheeting

in the area from which they were pulled. SDE collected a soil sample from the bottom of three (3) freshly

extracted posts for analyses to fulfill characterization requirements for disposal at Vonco. The analytical


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results indicated the soil was non-hazardous and below the cleanup criteria. Upon receipt of a non-

hazardous waste profile number, 14-446-I, SDE transported 8.83 tons of posts and concrete to Vonco for

disposal. Post holes were back-filled with class 5 aggregate.

SDE removed chain-link fence fabric from the fences around the RH System Building and the Shops

Area. Fence fabric was rolled and placed inside of the RH Valve House as directed by CP. CP removed

the chain-link fence fabric from the former RH turntable pit area, which was reinstalled by CP following the

conclusion of the decommissioning process. Fence posts were removed with a skid-steer mounted fence

post puller and recycled along with barbed wire and fence hardware. Fence post holes were backfilled

with class 5 aggregate. One (1) fence post in the Shops Area was located in the vicinity of a gas main

identified during the utility locate. Per CenterPoint Energy’s recommendation, SDE cut the post flush with

the ground surface rather than extracting the post to avoid potentially disturbing the gas main. After the

Shops Area fence was removed, CenterPoint Energy abandoned the gas main extending to the fence

post marker.

2.1.7 SVE Wells, Vacuum Monitoring Probes, Soil Gas Borings The Roundhouse and Shops Areas included 23 SVE wells, 30 vacuum monitoring probes, and six (6) soil

gas probes. PVC risers for the SVE wells and vacuum monitoring probes were cut approximately 1-foot

below grade and sealed with neat cement introduced via a piston grout pump and tremie pipe in

accordance with Minnesota Rule 4725.3850. The six (6) soil gas probe risers located within the

Roundhouse structure were cut flush with the floor slab and sealed. All SVE wells and monitoring probes

that penetrated a concrete slab were sealed at the surface with a ready-mix concrete patch. SDE

removed the flush mount covers/collars from two (2) vacuum monitoring probes that penetrated the

roadway between the Roundhouse and Shops Areas (VP06-71-CT1, VP06-64-CA6) and restored the

road surface with two (2) - 50 pound bags of cold asphalt mix.

2.1.8 Phone Line The RH SVE system and Southeast Pump and Treat (SE P&T) System building shared the same

telephone line for alarm auto-dialing. The telephone line was re-routed to overhead utility poles by CP’s

contractor, FME, so as to continue to serve the SE P&T system.

2.2 Former Waste Reclamation Area SVE Decommissioning Process

2.2.1 Condensate, Oil, Air Filters, Carbon Prior to initiating equipment removal, Golder coordinated with CP’s contractor, WCEC, to remove all

condensate water from the polyethylene condensate collection tank located in the former Waste

Reclamation Area SVE System Building (WR System Building). Approximately 100 gallons of


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condensate water were removed on August 29, 2014 and transported and disposed at WCEC’s facility in

Minneapolis.

Oil was drained from the SVE blower located in the WR System Building and placed in CP’s designated

on-Site used oil receptacle for recycling. The in-line particulate filter and dilution-air particulate filter were

removed from the WR System Building and disposed in CP’s on-Site general trash dumpster.

Evoqua, removed the granular activated carbon from the two (2) WR SVE carbon vessels on October 29,

2014. Carbon from the WR SVE filled a total of three (3) super sacks. Evoqua transported the super

sacks to Covanta to be incinerated.

2.2.2 Electrical Service CPs contractor, FME, disconnected electrical service to the Former Waste Reclamation Area (WR)

Systems Building. Xcel Energy disconnected the feed to the on-Site utility pole, allowing the pole to be

removed by FME. Electrical components left intact within the building use included:

Electrical panels

Electrical wall outlets

Lighting, heater

Exhaust fans

Associated conduit and switches

2.2.3 Building and System Equipment SDE removed all SVE equipment from inside of the WR SVE Systems Building, with the exception items

noted in Section 2.2.2. The SVE blower, blower motor, and silencer assembly was removed intact and

transported the SDE’s shop to be salvaged or disassembled for recycling.

SDE used potable water, for rinsing the interior walls of the two (2) WR carbon vessels and the WR

polyethylene condensate tank. Rinse water was co-mingled with the rinse water collected from the RH

SVE System. The drums of rinse water were transported off-Site by SDE on November 13, 2014 for

disposal at a Metropolitan Council Environmental Services facility. The carbon vessels and poly tank

were transported to SDE’s shop for salvaging or recycling.

Metal components such as steel pipe, filter housings, air-water separator, conduit, and brass valves were

placed in a roll-off container designated for recyclable metals. All other debris such as PVC pipe and wall

insulation was placed in a roll-off designated for general demolition debris.


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After all interior and exterior SVE components were removed, the intact WR System Building was hoisted

by a crane operated by MSC and placed on a flat-bed semi-trailer. The building was transported to CP’s

Hastings Rail Yard by MST on November 7, 2014.

2.2.4 Concrete Slabs After the removal of the WR SVE Systems Building and external equipment, the reinforced concrete slabs

that served as building and equipment foundations were removed. SDE used an excavator bucket to

break up the slabs and load the conjoined concrete and rebar into the appropriate roll-off for recycling.

2.2.5 Conveyance Piping Above-grade conveyance piping leading from vapor extraction wells to the WR SVE System Building

consisted of four inch diameter PVC pipe wrapped with heat-trace, insulation and metal jacketing. Using

a reciprocating saw, SDE cut piping into sections and placed the sections into the general demolition

debris roll-off.

2.2.6 Conveyance Pipe Supports and Fencing Black iron pipe support cross members were unbolted from vertical, galvanized steel support posts and

placed in a roll-off designated for recycling. Concrete embedded posts were pulled out of the ground

using a skid-steer mounted fence-post puller. SDE used a jack-hammer to separate posts from concrete

and the materials were placed in the appropriate roll-off containers for recycling. Post holes were back-

filled with class 5 aggregate.

SDE removed chain-link fence fabric from the fences around the WR Systems Building. Fence fabric was

rolled and placed inside of the RH Valve House. Fence posts were removed with a skid-steer mounted

fence post puller and recycled along with barbed wire and fence hardware. Fence post holes were

backfilled with class 5 aggregate.

2.2.7 SVE Wells, Vacuum Monitoring Probes, Soil Gas Borings The Former Waste Reclamation Area system included seven (7) SVE wells, nine (9) vacuum monitoring

probes, and six (6) soil gas probes. PVC risers for the SVE wells and vacuum monitoring probes were

cut approximately 1-foot below grade and sealed with neat cement introduced via a piston grout pump

and tremie pipe in accordance with Minnesota Rule 4725.3850. Two of the soil gas probes, SGB5-S and

SGB5-D, were subsequently removed during the excavation activities described in Section 3.0. The

remaining four (4) soil gas probes, SGB4-S, SGB4-D, SGB6-S, and SGB6-D, were retained to facilitate

post decommissioning monitoring.


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3.0 FORMER WASTE RECLAMATION AREA SHALLOW SOIL EXCAVATION

3.1 Excavation Activities

3.1.1 Soil Pre-characterization On October 29, 2014, SDE collected soil samples from three (3) test pits within the proposed excavation

area to determine waste characteristics for disposal at Vonco’s landfill. Prior to the commencement of

excavation activities, Vonco issued a non-hazardous profile number (14-432-1) to identify this waste

stream. The pre-characterization of the excavated soil alleviated the need for stockpiling and facilitated

direct disposal.

3.1.2 Soil Excavation/Disposal Soil excavation activities occurred between November 6 and 7, 2014. Prior to excavation activities, the

required excavation outline (shown in Drawing 2 of the approved Work Plan) was marked in the field.

SDE installed 12 inch diameter erosion control rolls around the perimeter of the excavation area in

accordance with the Erosion and Sedimentation Control Plan (Golder, 2014d). As described in the Work

Plan, the lateral extent of the excavation along the northeast perimeter was defined by field headspace

screening methods using a photoionization detector (PID) and flame ionization detector (FID) in other

locations of the excavation. Screening levels were determined by collecting seven (7) soil samples

collected along the portion of the exposed sidewall between soil borings SB14-10 and SB14-23 to

determine PID/FID readings representative of soils below the cleanup criteria. The maximum FID reading

from the initial seven (7) samples was 6 ppm and the maximum PID reading was 3 ppm. Based on these

findings, the limits of excavation were further identified by PID readings less than 3 ppm and FID readings

less than 6 ppm.

During excavation activities, soil samples were collected from the northeast excavation perimeter at 5-foot

intervals for screening with a PID and FID. When field screening dictated, SDE expanded the excavation

by one excavator bucket width (approximately 4 feet). Soil was then resampled from the sidewall, and the

process was repeated until PID/FID results fell below screening levels.

Soil removal was continued to a depth of 4 feet throughout the area designated in the Work Plan and as

defined based by field screening. As agreed to by MPCA on September 26, 2014, the excavation was not

continued past 4 feet because previous soil borings collected in the excavation footprint indicated that the

remaining soil contamination was limited to depths of less than 4 feet.

Soil removed from the former Waste Reclamation Area excavation was placed directly into either lined

roll-off containers supplied by Capital Waste Systems (CWS) or into dump trucks operated by Miller

Trucking. The soil was covered and transported by SDE, CWS, and Miller Trucking to Vonco for disposal.

A total of 277.63 tons of soil was excavated and disposed.


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3.2 Back-Filling Activities

3.2.1 Excavation Back-Filling After the excavation extent was surveyed on November 7, 2014, SDE back-filled the excavation with

class 5 aggregate. Aggregate was placed in lifts not exceeding 8-inches and compacted by a minimum of

five (5) passes of a Rammax 1575 compactor. Miller Trucking delivered a total of 323.13 tons of class 5

aggregate for back-fill material.

Back-filling activities occurred from November 7, 2014 to November 13, 2014. On the morning of

November 11, 2014, snow from the previous night had to be removed from the excavation area before

additional fill material was placed. SDE used a skid steer bucket to agitate the upper 2-3 inches of

previously compacted back-fill to verify that the ground had not frozen overnight. After confirming that the

ground had not frozen, SDE resumed back-filling activities after re-compacting the agitated back-fill.

3.2.2 Survey Meyer-Rohlin Land Services (MRLS) surveyed the extent of the shallow soil excavation on November 7,

2014 and returned to the Site on November 13, 2014 to survey the final surface elevations of the

excavation area once back-filled. The horizontal extents of the excavation were referenced to the

Hennepin County Coordinate System, NAD 83 (1996), with elevations surveyed to the nearest 1/10 foot.

The As-Built Survey of Excavated Area & Backfill is provided in Appendix A.


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4.0 HEALTH AND SAFETY Prior to mobilization, Golder and SDE prepared site-specific Health and Safety Plans (HASPs), in

accordance with the project specifications. The purpose of the HASPs was to identify, highlight, and

address potential health and safety concerns associated with the project work activities. Golder and

SDE’s HASPs also incorporated the Canadian Pacific Minimum Safety Requirements for Contractors

Working on Railway Property (CP, 2007).

Golder and SDE began each day with a tailgate meeting to discuss the pending day’s activities, potential

hazards associated with those activities and health and safety risk mitigation. Health and safety was also

a primary discussion topic during weekly construction progress meetings throughout Site work activities.

The weekly construction progress meetings were attended by representatives from Golder and SDE.

SDE conducted Job Safety Analyses (JSAs) for the tasks associated with the operation of the trackhoe

during soil excavation and operation of the crane during the movement of SVE buildings. The JSAs

identified potential hazards associated with specific job steps and the critical actions necessary to perform

those steps safely. The JSAs were reviewed during the daily tailgate meeting on the days that the

respective equipment was used.

All work performed was conducted with prior coordination and approval from CP and communication was

maintained with CP regarding the proposed work activities. Golder field staff continually monitored all

subcontractors to insure compliance with the Canadian Pacific Minimum Safety Requirements for

Contractors Working on Railway Property (dated April 2007), and other safety requirements, rules and

recommended practices contained in the Contract Documents. During the performance of the work, no

injuries occurred.


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5.0 CONSTRUCTION DOCUMENTS

5.1 Project Meetings

5.1.1 Weekly Progress Meetings Construction meetings were held on a weekly basis throughout SVE decommissioning and soil

excavation activities. The construction meetings were moderated by the Golder project manager and

were attended by representatives from SDE and Golder. The meetings were used as a forum to review

health and safety, site security, erosion and sedimentation control, work completed in the prior week,

work anticipated to be completed in the following week and overall construction schedule.

5.1.2 Daily Safety and Activity Preparation Meetings Safety tailgate meetings were held at the beginning of each day to discuss health and safety concerns

related to the planned work for that day. These meetings were attended by Golder, SDE, and all other

sub-contractors performing on-Site work that day.

5.2 Reports

5.2.1 Daily Field Reports Golder prepared daily field reports to document construction activities.

5.2.2 Weekly Construction Meeting Reports Golder maintained and distributed draft minutes from the weekly construction meetings to all attendees

for review, and subsequently issued final minutes after incorporating comments from attendees. Minutes

were distributed to all attendees.

5.2.3 Photographic Record Documentation Photographic record documentation was maintained by Golder during SVE decommissioning and

excavation activities. Selected representative photos are included in Appendix B.


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6.0 POST-DECOMMISSIONING ACTIVITIES

6.1 Soil Vapor Monitoring At the specific request of MPCA, existing soil gas probes SGB4-S/D and SGB6-S/D in the former Waste

Reclamation Area proximate to the eastern property boundary were retained and are being used to

monitor soil vapor levels. The monitoring includes quarterly soil vapor sampling for VOCs for two years

following decommissioning. Soil gas results are to be compared to the MPCA compound-specific,

industrial intrusion screening values (ISVs) with appropriate attenuation factors, and reported to MPCA on

an annual basis.

The first quarterly vapor monitoring event was completed in December 2014, and is scheduled to

continue quarterly through the 3rd quarter of 2016. The results of the most recent soil vapor sampling

event (1st quarter 2015) are provided in Tale 1. There were no exceedances of the relevant screening

criteria (10x the ISVs) for all VOCs, including the primary contaminants of concern (PCE, TCE).



June 2015 14 023-6105.015

7.0 CERTIFICATION STATEMENT I certify that this Completion Report represents an account of the construction activities associated with

the decommissioning of soil vapor extraction systems at the Roundhouse/Former Shop Area and former

Waste Reclamation Area, and former Waste Reclamation Area soil excavation based on my personal

knowledge of the Site, and that the construction was performed in accordance with the requirements and

intent of the Contract Documents, and design specifications.

I hereby certify that this Completion Report was prepared or approved by me, and that I am a duly

licensed Professional Engineer under the Laws of the State of Minnesota, License No. 21116, Expiration

Date: 06/30/16.

Barbara Johnson Associate and Senior Engineer Type/Printed Name Title

June 30, 2015 Signature Date

June 2015 15 023-6105.015

8.0 REFERENCES Golder and Geomega, 2005. Response Action Plan for the East Side Shoreham Facility, August 2005

CP, 2007. Canadian Pacific Minimum Safety Requirements for Contractors Working on Railway Property, April 2007

Golder, 2013. Confirmation Soil and Soil Gas Sampling Work Plan for the Roundhouse/Shops and Former Waste Reclamation Soil Vapor Extraction Areas, September 2013

Golder, 2014a. Response Action Implementation Report (RAIR), May 2014

Golder, 2014b. Soil Delineation Work Plan, Former Waste Reclamation Area, July 2014

Golder, 2014c. Work Plan, Decommissioning of Soil Vapor Extraction Systems and Former Waste Reclamation Area Soil Excavation, August 2014

Golder, 2014d. Erosion and Sedimentation Control Plan, October 2014


June 2015 Table 1Soil Gas Analytical Results

Soil Vapor SamplingCanadian Pacific Shoreham Yard Facility

023-6105

G:\PROJECTS\2002 Projects\023-6105 CPR\SVE Decommissioning\Completion Report\Final to MPCA 06-30-2015\Table 1 Soil Gas Results.xlsx Page 1 of 1

Checked by: SS 6/8/2015

SGB4-S Duplicate SGB4-D Duplicate-2 SGB6-S SGB6-D03/26/2015 15:45 03/26/2015 15:45 04/17/2015 13:14 04/17/2015 13:14 03/26/2015 15:55 03/26/2015 17:12

Parameter Units

MPCA Industrial 10X Attenuation Factor ISV

(2009) Result Result Result Result Result Result1,1,1-Trichloroethane ug/m3 100000 180 170 220 230 59 701,1-Dichloroethane ug/m3 10000 ND ND 11 12 ND ND1,2,4-Trimethylbenzene ug/m3 200 ND ND ND ND ND ND1,3,5-Trimethylbenzene ug/m3 200 ND ND ND ND ND ND1,3-Butadiene ug/m3 10 ND ND ND ND ND ND2,2,4-Trimethylpentane ug/m3 NS ND ND ND ND ND ND2-Butanone (Methyl Ethyl Ketone) ug/m3 100000 500 520 ND ND 46 2602-Hexanone ug/m3 NA 90 100 ND ND ND ND2-Propanol ug/m3 200000 480 500 ND ND 44 12004-Ethyltoluene ug/m3 NA ND ND ND ND ND ND4-Methyl-2-pentanone ug/m3 80000 ND ND ND ND ND NDAcetone ug/m3 870000 3100 3100 93 100 180 2600Benzene ug/m3 130 ND ND ND ND ND NDCarbon Disulfide ug/m3 20000 ND ND ND ND ND NDcis-1,2-Dichloroethene ug/m3 NA ND ND 13 13 ND NDCumene ug/m3 NS ND ND ND ND ND NDCyclohexane ug/m3 200000 ND ND 4 4.2 ND NDEthanol ug/m3 420000 98 100 14 9.4 54 430Ethyl Benzene ug/m3 30000 ND ND ND ND ND NDFreon 11 ug/m3 20000 ND ND ND ND ND NDFreon 12 ug/m3 6000 ND ND ND ND ND NDHeptane ug/m3 NA ND ND ND ND ND NDHexane ug/m3 60000 ND ND ND ND ND NDm,p-Xylene ug/m3 3000 ND ND 8.4 8.4 5.6 NDMethylene Chloride ug/m3 600 ND ND ND ND ND NDo-Xylene ug/m3 3000 ND ND ND ND ND NDPropylbenzene ug/m3 NS ND ND ND ND ND NDTetrachloroethene ug/m3 600 300 300 510 530 43 52Tetrahydrofuran ug/m3 NA ND ND ND ND ND NDToluene ug/m3 100000 ND ND 19 19 6.2 NDtrans-1,2-Dichloroethene ug/m3 2000 ND ND ND ND ND NDTrichloroethene ug/m3 80 24 ND 27 27 ND ND

Notes and Abbreviations:ND - not detectedNA - no toxicity data availableNS - no standardug/m3 - micrograms per cubic meter

1. Results greater than the MPCA Industrial 10X Attenuation Factor ISV (2009) are shaded and bolded.2. Only compounds detected in at least one sample are shown.3. SGB4-D could not be sampled in March 2015 due to a blockage in the probe. The probe was repaired and resampled in April 2015

Sample NameSample Date

MPCA Industrial ISV, 10X Attenuation Factor (2009) - Minnesota Pollution Control Agency Industrial Intrusion Screening Values for Vapor Risk Evaluation (2009), accessed at URL http://www.pca.state.mn.us/index.php/view-document.html?gid=3163

SOO LINESHOREHAM FACILITY

EAST SIDE SITE

REFERENCE1.) MAP TAKEN FROM U.S.G.S. 7.5 MINUTE QUADRANGLES OFNEW BRIGHTON, MINNESOTA, DATED 1997 AND MINNEAPOLISNORTH, MINNESOTA, DATED 1967.

SITE LOCATION MAP

1SOO LINE SHOREHAM FACILITY

SHOP~ EA

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s VP06-61-CA3 /

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~/\:~m - __ - ---- FLOOR SLAB

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" " '-.... ' INf!W. APPROXIMATE '-

EXTENT OF SOIL '-EXCAVATION

(SEE NOTE 2)

CARBON VESSELS

---

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LEGEND

FACIUTY BOUNDARY

RAILR!Wl TRACKS

SVE SYSTEM PIPING (AllOllE GRADE) - REMOVED

· ···•··•··•··•··•··•··•· SVE SYSTEM PIPING (EIELOW GRADE) - REMOVED

-------- FlDCIBLE (FlDC) HOSE - REMOVED

D D

TILL SVE WELL - DECOMMISSIONED

AW.Jl/IUM SVE WELL - DECOMMISSIONED

TILL MONITORING PROBE - DECOMMISSIONED

ALLIMUM MONITORING PROBE - DECOMMISSIONED

SVE SYSTEM ENCL.OSURE - DECOMMISSIONED

SVE VALVE HOUSE - DECOMMISSIONED

AXED PIPE SUPPORT - REMOVED

HEAT EXCHANGER - REMOVED

CARBON ~ - REMOVED

_,_,_,_ CHAIN LINK FENCE - REMOVED

SIW.LOW SOIL GAs BORING (SGB) LOCATION (SEE REFERENCE 4)

~ DEEP SOIL GAs BORING (SGB) LOCATION (SEE REFERENCE 4)

-·-·-·- CHAIN LINK FENCE REMOVED BY CP NID RE-INSTALLED AFTER SVE DECOMMISSIONING (MAY 201e)

NOTES 1.) ALL COMPONENTS ASSOCIATED WITH THE SVE SYSTEMS WERE REM<M:D OR DECOMMISSIONED WITH THE EXCEPTION OF THE VALVE HOUSES (WITHOUT EQUIPMENT), SOIL GAs PROBES SGB4-S AND SGB4-D NID SGB6-S AND SGB6-D, AND CHAIN LINK FENCE AT THE FllRMER TURNTABLE PIT.

2.) ANAL EXTENT OF SOIL EXCAVATION PROVIDED IN AS-BUILT SURVEY DRAWING.

REFERENCES 1.) BASE MAP FROM DIGITAL CAD FILE NEWJ!ASE_2_2001.dq, l1TILED "PORTIONS OF SECTIONS 2 le 11 T29N, R24W HENNEPIN CO., MN", PROVIDED BY AMEC EARTH NID ENl/IRONMENTAL. INC.

2.) PROPERTY LINE AND ROW FROM DIGITAL CAD ALE NEW_BASE..JLOO-property line.dwg PR<MDED BY AMEC EARTH AND Elf>'IRONMENTAL, INC.

3.) SVE WELL LOCATIONS TAKEN FROM EXCEL FILE BY "SUNDE LAND SURVEYING. L.LC.", SEPTEMBER 19TH, 20D6.

4.) SHALl.OW SOIL GAs -ING AND DEEP SOIL GAs BORING LOCATIONS TAKEN FROM DIGITAL CAD FILE HSJ201350llSB.DWG, ENTITLED "'LOCATION SURVEY le BASE MAP," PREPARED BY HARRY S. JOHNSON CO •• INC. LAND SURVEYORS, DATED NOVEMBER 26, 2013.

0 40 80

FEET

RE.V llo'.TE DES REVISION DESCRIP'TlON CAOO CHK fMl

PROJECT

1T1lE

SOO LINE SHOREHAM FACILITY MINNEAPOLIS, MINNESOTA

FORMERSVE SYSTEMS LAYOUT

(J'A. PROJECT No. 023-e105 FILE No. 023810SCR02

DESIGN DNB 08/26/15 SCloLE IS SHOWN RE.V. 0

CADD AM 08/28/15 CHEQ< DNB 08/28/15 FIGURE 2

Mt. Lcurel, New Jen11ey REVIEW llSJ 08/28/15

APPENDIX A

AS-BUILT SURVEY OF EXCAVATED AREA & BACKFILL

APPENDIX B

PHOTOGRAPHS

June 2015 B-1 023-6105.015

APPENDIX B - PHOTOGRAPHS

Photo 1 - General demolition debris roll-off containing conveyance pipe and SVE components from the Shops Area.

Photo 2 - Skid-steer mounted fencepost puller extracting conveyance pipe support posts and concrete footing.

June 2015 B-2 023-6105.015

Photo 3 – Skid-steer mounted jack-hammer separates conveyance pipe support posts from concrete footings.

Photo 4 – Skid-steer extracting blower/motor/silencer assembly from RH SVE System Building.

June 2015 B-3 023-6105.015

Photo 5 – RH SVE Systems Building with SVE equipment removed.

Photo 6 – Recyclable metals roll-off containing RH SVE equipment.

June 2015 B-4 023-6105.015

Photo 7 – Grouting vapor extraction well VEW06-32-GT2 in Shops Area.

Photo 8 – Decommissioned vacuum monitoring points with concrete patches inside of the Roundhouse structure.

June 2015 B-5 023-6105.015

Photo 9 – Carbon super sacks staged in Roundhouse awaiting transport to Covanta for disposal.

Photo 10 – Crane hoisting WR SVE System Building onto semi-trailer.

June 2015 B-6 023-6105.015

Photo 11 – Broken up RH SVE Systems Building pad.

Photo 12 – E&S controls at WR excavation area.

June 2015 B-7 023-6105.015

Photo 13 – Backfilling WR excavation area with class 5 aggregate and compacting.

Photo 14 – Former Waste Reclamation Area (complete).

June 2015 B-8 023-6105.015

Photo 15 – Exterior Roundhouse Area (complete).

Photo 16 – Roundhouse interior (complete)

June 2015 B-9 023-6105.015

Photo 17 – Shops Area (complete)

Golder Associates Inc. 1751 W. County Road B, Suite 105

Roseville, MN 55113 USA Tel: (651) 697-9737 Fax: (651) 697-9735

Golder, Golder Associates and the GA globe design are trademarks of Golder Associates Corporation