Wood Environment & Infrastructure Solutions, Inc.800 Marquette Avenue, Suite 900

Minneapolis, MN 55402USA

T: 612-332-8326www.woodplc.com

‘Wood’ is a trading name for John Wood Group PLC and its subsidiaries  

March 22, 2021 VIA EMAIL Attn: Ms. Karlene French Manager, Environmental Remediation, Canadian Pacific Re: Shoreham Yard Monitoring Wells Vault Inspection Results – March 2021 Variance TN5822, Shoreham Yard, Minneapolis, Minnesota Dear Ms. French, Wood Environment & Infrastructure Solutions, Inc. (Wood) conducted an inspection of 17 monitoring well vaults installed during the 2019 redevelopment of a portion of the East Side of Shoreham Yard (the Site). The vaults were installed to protect the conversion of existing monitoring wells to at- and below-grade wells and were completed in accordance with the conditions of Minnesota Department of Health (MDH) Well Variance TN5822, dated October 3, 2019. Semi-annual inspections of the vaults are required under the conditions of the variance; Wood conducts quarterly inspections at Canadian Pacific’s request. Wood opened and inspected the vaults during a round of quarterly water level measurements conducted on March 16 and 17, 2021. Inspection observations are recorded in the attached checklist. Wood noted the following potential damage during the inspection (see field photographs below):

Indications of spalling at an upper concrete seam within two vaults: MW00-42-T (Unique ID 594634) and MW07-42-I (Unique ID 751347). Approximately 3 feet of standing water was present in the vault for MW00-42-T; approximately 5 feet of water had accumulated in the vault for MW07-42-I. Water levels were below the top of well casing at both wells. Wood removed water from the vaults using a submersible pump. Since melt water from recent snowfall was present in the vault lid seams and surrounding the vault lid bolts prior to opening the lids, seepage through the gaskets and bolts is not thought to be the source of the standing water.

Minor damage to the pad and surrounding pavement of the vault associated with MW07-42-I (751347), including a

small portion of the cement crack sealant applied last year having chipped out during the winter and two corners of the pad missing chunks of concrete where the surrounding pavement appears to have settled. This damage is likely related to snow plowing over the winter months.

We observed no other damage to monitoring wells vaults. Wood recommends reporting the observed damage to the City of Minneapolis and the MDH as required by the variance. Regards, Wood Environment & Infrastructure Solutions, Inc. Matt Vavra Bob Marxen, PE CHMM PMP Project Manager Senior Engineer 651-341-5560 612-252-3769 matt.vavra@woodplc.com bob.marxen@woodplc.com

 

FIELD PHOTOGRAPHS

 

Photo 1 – MW07-42-I, on arrival

Photo 2 – MW07-42-I, showing chipped crack sealant

 

Photo 3 – MW07-42-I, showing broken pad corners

Photo 4 – MW00-42-T, showing accumulated water and potential spalling in the well vault

WELL AND VAULT INSPECTION FORMCanadian Pacific Railway

Shoreham Yard

WELL INSPECTION LOG

Well Name MW00-40-T MW00-42-MS MW00-42-T MW04-27-T MW04-28-I MW04-28-OPD MW04-28-T MW04-29-BR MW04-31-OPD MW04-31-SP MW04-31-T MW04-95-T MW04-155-T

Unique Well ID 594639 594635 594634 705485 705496 701964 705495 709250 701965 710254 710253 717711 737635

Well Pupose Monitoring Monitoring Monitoring Monitoring Monitoring Monitoring Monitoring Monitoring Monitoring Monitoring Monitoring Monitoring Monitoring

Finish At Grade At Grade At Grade Below Grade Below Grade Below Grade Below Grade Below Grade At Grade At Grade At Grade Below Grade Below Grade

INSPECTOR , DATE, TIME, CONDITIONS

Inspector Initials MJV/SW MJV/SW MJV/SW MJV/SW MJV/SW MJV/SW MJV/SW MJV/SW MJV/SW MJV/SW MJV/SW MJV/SW MJV/SW

Date / Time 3/16/2021 16:20 3/16/2021 16:45 3/16/2021 16:35 3/16/2021 15:35 3/16/2021 11:44 3/16/2021 11:43 3/16/2021 11:20 3/16/2021 13:15 3/17/2021 8:20 3/17/2021 8:05 3/17/2021 8:07 3/16/2021 15:20 3/16/2021 15:40

Weather Conditions 30s Partly Cloudy 30s Partly Cloudy 30s Partly Cloudy 30s Partly Cloudy 30s Partly Cloudy 30s Partly Cloudy 30s Partly Cloudy 30s Partly Cloudy 30s Partly Cloudy 30s Partly Cloudy 30s Partly Cloudy 30s Partly Cloudy 30s Partly Cloudy

Photos Taken? (If YES, photos to be attached to the spreadsheet)

No No Yes No No No Yes No No No No No No

OBSERVATIONS PRIOR TO OPENING ENCLOSURE (Y=yes, N=no; any "N" requires an action item)Exterior/lid in good condition? Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Surface surrounding well in good condition?

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

There is no evidence of the vault settling. (Yes = OK, No = action needed)

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Lid secured with bolts or lock? Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes YesOBSERVATIONS WITH WELL ENCLOSURE OPEN (Y=yes, N=no; any "N" requires an action item)Lid hinges operating smoothly and in good condition?

N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

Enclosure free of water and signs of water staining?

Vault bottom is damp but no standing water

Approximately 1.5 feet of water in

vault

Approximately 3 feet of water in vault

Approximately half-inch of water in vault

Approximately half-inch of water in vault

Approximately quarter-inch of water in vault

Approximately 3 feet of water in

vault

Approximately 2-inches of water in

vault

Minor water staining but no standing water

Approximately 1.5-inches of water in

vault

Approximately 1.5 feet of water in

vault

Minor water staining but no standing water

Approximately quarter-inch of water in vault

Watertight seal around lid intact? Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Watertight cap with vent installed in well?

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Is the vault in good condition? (no evidence of the vault cracking or spalling)

Yes YesPotential evidence of spalling at

a concrete seam within the vault (see photo)

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

LIST ACTION ITEMS/NOTESIf there are any instances of "No" for an inspection item, identify the action item here and follow up.

N/A

Standing water was pumped out of the vault at the time of

the inspection.

Standing water was pumped out of the vault at the time of the inspection. Any additional

evidence of spalling will be noted during the next quarterly

inspection

Insufficient water to effectively pump. The vault will be rechecked

during the next quarterly inspection

Insufficient water to effectively pump. The vault will be rechecked

during the next quarterly inspection

Insufficient water to effectively pump. The vault will be rechecked

during the next quarterly inspection

Standing water was pumped out of the vault at the time of

the inspection.

Standing water was pumped out of the vault at the time of

the inspection.

N/A

Standing water was pumped out of the vault at the time of

the inspection.

Standing water was pumped out of the vault at the time of

the inspection.

N/A

Insufficient water to effectively pump. The vault will be rechecked

during the next quarterly inspection

ACTION ITEM FOLLOWUP (if required)

Date Action Items Completed N/A 3/16/2021 3/16/2021 N/A N/A N/A 3/16/2021 3/16/2021 N/A 3/17/2021 3/17/2021 N/A N/A

Initials N/A MJV MJV N/A N/A N/A MJV MJV N/A MJV MJV N/A N/A

MW = Monitoring Well

NOTES:1) Consult the MDH Variance for specific details a) Environmental (monitoring) wells to be inspected twice per year (Wood).2) Any damage or defects must be reported to MDH and repaired within 7 days of discovery3) Any water discovered in an enclosure must be removed immediately4) A summary of well inspection activities must be reported to MDH annually.

WELL AND VAULT INSPECTION FORMCanadian Pacific Railway

Shoreham Yard

WELL INSPECTION LOG

Well Name

Unique Well ID

Well Pupose

Finish

INSPECTOR , DATE, TIME, CONDITIONS

Inspector Initials

Date / Time

Weather Conditions

Photos Taken? (If YES, photos to be attached to the spreadsheet)OBSERVATIONS PRIOR TO OPENING ENCLO Exterior/lid in good condition?

Surface surrounding well in good condition?

There is no evidence of the vault settling. (Yes = OK, No = action needed)

Lid secured with bolts or lock?OBSERVATIONS WITH WELL ENCLOSURE O Lid hinges operating smoothly and in good condition?

Enclosure free of water and signs of water staining?

Watertight seal around lid intact?

Watertight cap with vent installed in well?

Is the vault in good condition? (no evidence of the vault cracking or spalling)

LIST ACTION ITEMS/NOTESIf there are any instances of "No" for an inspection item, identify the action item here and follow up.

ACTION ITEM FOLLOWUP (if required)

Date Action Items Completed

Initials

MW = Monitoring Well

NOTES:1) Consult the MDH Variance for specific d a) Environmental (monitoring) wells to b 2) Any damage or defects must be reporte 3) Any water discovered in an enclosure m 4) A summary of well inspection activities

MW06-29-I MW06-248-I MW07-41-I MW07-42-I

737626 748181 751346 751347

Monitoring Monitoring Monitoring Monitoring

Below Grade At Grade Below Grade Below Grade

MJV/SW MJV/SW MJV/SW MJV/SW

3/16/2021 14:08 3/16/2021 16:11 3/16/2021 13:58 3/16/2021 13:41

30s Partly Cloudy 30s Partly Cloudy 30s Partly Cloudy 30s Partly Cloudy

No No No Yes

Yes Yes Yes Yes

Yes Yes YesSome of the cement crack sealant has chipped out, and two pad corners are

broken

Yes Yes YesNo evidence of the vault settling, but

the surrounding pavement did

Yes Yes Yes Yes

N/A N/A N/A N/A

Approximately 1.5 feet of water in

vault

Approximately quarter-inch of water in vault

Approximately 2 feet of water in

vaultApproximately 5+ feet of water in vault

Yes Yes Yes Yes

Yes Yes Yes Yes

Yes Yes Yes

Potential evidence of spalling at a concrete seam within the vault and

water was bubbling out of the concrete in this area once the water level was lowered below this area.

Standing water was pumped out of

the vault at the time of the inspection.

Insufficient water to effectively pump. The vault will be rechecked

during the next quarterly inspection

Standing water was pumped out of the vault at the time of

the inspection.

Standing water was pumped out of the vault at the time of the inspection.

Additional vault repair may be needed and will be discussed with the group.

3/16/2021 N/A 3/16/2021 3/16/2021 (partial)

MJV N/A MJV MJV