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Imagine the result Ford Motor Company Subsurface Investigation Work Plan – Work Element 2 Twin Cities Assembly Plant St. Paul, Minnesota

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Imagine the result

Ford Motor Company

Subsurface Investigation Work Plan – Work Element 2

Twin Cities Assembly Plant

St. Paul, Minnesota

i

Table of Contents

1.  Introduction 1 

1.1  Property Location and Description 1 

2.  Field Methodology 2 

2.1  Utility Clearance 2 

2.2  Groundwater Investigation 2 

2.3  Soil Investigation 3 

2.4  Investigation-Derived Waste 4 

2.5  Surveying 4 

3.  Scope of Work 5 

3.1  Group A 5 

3.2  Group B 5 

4.  Reporting 6 

5.  Scheduling 7 

6.  References 8 

ii

Table of Contents

Tables

Table 1 Summary of Proposed Sampling Investigation

Figures

Figure 1 Site Location/Property Layout

Figure 2 Focus Areas Location Map

Figure 3 Focus Area 1 – North Parking Lot Area

Figure 4 Focus Area 2 – Open LUST Releases

Figure 5 Focus Area 4 – Former Hazardous Waste Storage Areas

Figure 6 Focus Area 6 – Former Hazardous Waste Storage and Disposal Areas

Figure 7 Focus Area 7 – Railroad Tracks

Figure 8 Focus Area 11 – Wastewater Treatment Plant

1

Subsurface Investigation Work Plan – Work Element 2

Twin Cities Assembly Plant 966 South Mississippi River Boulevard St. Paul, Minnesota

1. Introduction

On behalf of Ford Motor Company (Ford), ARCADIS has prepared this Subsurface

Investigation Work Plan – Work Element 2 (Work Plan) for the Twin Cities Assembly

Plant (TCAP; Site) in accordance with the requirements of the Minnesota Pollution

Control Agency (MPCA) Voluntary Investigation and Cleanup (VIC) Program and

Petroleum Brownfields Program (PBP). The property location and layout are depicted

on Figure 1.

This Work Plan describes Work Element 2 of subsurface investigation activities with

the purpose of evaluating impacts identified during the completion of the Subsurface

Investigation - Work Element 1 (WE1). The scope of work consists of the completion of

soil borings, installation of temporary monitoring wells, and soil and groundwater

sampling within 6 of 11 Focus Areas (FA) (Figure 2). Investigation activities will be

implemented and completed within each individual FA as they become available

following ongoing Site demolition activities.

1.1 Property Location and Description

The Site is located at 966 South Mississippi River Boulevard in St. Paul, Ramsey

County, Minnesota at approximate Latitude (north) 44o 54’ 50.8” and Longitude (west)

93o 11’ 31.9”. The Site is located in a mixed industrial, commercial and residential use

area on the eastern shore of the Mississippi River, along the east side of South

Mississippi River Boulevard, south of Ford Parkway and west of South Cleveland

Avenue (Figure 1).

Operations at the Site formerly consisted of the assembly and painting of light duty

trucks (Ford Ranger) using parts manufactured off-Site. Assembly processes included

welding, metal cleaning, painting and curing, windshield and trim installation and

preparation of the vehicles for final delivery. In addition, a wastewater treatment plant

and steam plant operated at the Site and was associated with the former assembly

operations. Manufacturing operations at the Site ceased on December 16, 2011 and

demolition activities commenced on June 10, 2013.

2

Subsurface Investigation Work Plan – Work Element 2

Twin Cities Assembly Plant 966 South Mississippi River Boulevard St. Paul, Minnesota

2. Field Methodology

This section provides a summary of the means and methods to be utilized during this

subsurface investigation. Field logbook/documentation procedures and the field quality

assurance program will be implemented in accordance with the approved June 2007

Field Sampling Plan (FSP) (ARCADIS 2007) and its amdendment (ARCADIS 2013).

2.1 Utility Clearance

A full utility clearance will be performed prior to initiating any subsurface work at the

Site. Activities will include at a minimum:

Notification of Gopher One Call for marking of all public utility lines servicing the

Site,

Location of private utilities in the areas identified for subsurface work, and

Surficial inspection using available utility and historic operational maps for each

proposed boring location.

After removing any surficial debris (i.e., asphalt or concrete), a hand auger will be used

to: 1) confirm the presence/absence of utilities and 2) investigate the top five feet bgs if

no utilities exist. When hand augering will not be possible due to subsurface

material/utilities a hydro-vacuum unit will be used to clear the area. Note that this will

not allow ARCADIS to collect soil samples for analytical testing if the hydro-vacuum

unit is utilized.

2.2 Groundwater Investigation

Groundwater elevation and potential impacts will be determined through the installation

and sampling of temporary monitoring wells in defined areas within select FAs.

Temporary wells will be installed in select boreholes (presented in Table 1) to

determine potential groundwater impacts within the upper water-bearing unit.

Temporary wells will be constructed of 1-inch diameter, 5-foot-long polyvinyl chloride

(PVC) slotted well screens and associated PVC riser. The temporary wells will be

purged of at least one gallon of groundwater using a peristaltic pump and disposable

tubing prior to sampling to minimize turbidity. At least one groundwater water sample

will be collected from the shallowest groundwater encountered at each location.

Groundwater samples collected from temporary monitoring wells will be analyzed for

one or more of the following analytes:

3

Subsurface Investigation Work Plan – Work Element 2

Twin Cities Assembly Plant 966 South Mississippi River Boulevard St. Paul, Minnesota

Volatile organic compounds (VOCs) using USEPA Method 8260,

Semi-volatile organic compounds (SVOCs) using USEPA Method 8270,

Gasoline range organics (GRO) and diesel range organics (DRO) using the WI

Modified Method,

Dissolved Target Analyte List (TAL) Metals and Lead using USEPA Method

6010, and

Cyanide using USEPA Method 335.4.

All samples analyzed for metals will be field filtered using a 0.45-micron disposable

filter prior to sample collection. A summary of the proposed temporary monitoring well

locations and analytical parameters is presented in Table 1.

2.3 Soil Investigation

Soil borings will be advanced using direct push technology in areas of known impacts.

Each boring will be logged continuously by an ARCADIS field geologist and screened

using a Photoionization Detector (PID) with an 11.7 electron volt (eV) lamp that has

been calibrated at least twice a day. Soil boring logs will be created in the field and

identify material encountered for each borehole to total depth using the United Soil

Classification System (USCS). Upon completion, bentonite chips will be used to

abandon each borehole if the borehole is unregulated. If the borehole is classified as a

“regulated hole” according to Minnesota Department of Health (MDH) guidelines, the

borehole will be sealed in accordance with MDH Guidelines and a Borehole Sealing

Record will be prepared.

A minimum of one and up to four soil samples will be collected at each borehole. At

proposed delineation locations, one soil sample will be collected from the interval

depicting the highest PID reading or potential impacts through visual or olfactory

observations. Although this interval is anticipated to correspond with exceedances

observed at the original borehole location, additional soil samples may be collected

from intervals corresponding to initially observed exceedances or intervals below the

observed exceedance to provide vertical delineation.

Soil samples will be collected in laboratory supplied containers and placed on ice

pending shipment to the laboratory. Following standard chain-of-custody procedures,

all samples will be submitted to a designated laboratory for analysis of one or more of

the following analytes:

4

Subsurface Investigation Work Plan – Work Element 2

Twin Cities Assembly Plant 966 South Mississippi River Boulevard St. Paul, Minnesota

VOCs using USEPA Method 8260,

SVOCs using USEPA Method 8270,

GRO and DRO using the WI Modified Method,

TAL metals using USEPA Method 6010,

Cyanide using USEPA Method 335.4.

Anticipated boring depths and laboratory analysis parameters for each boring location

is presented in Tables 1.

2.4 Investigation-Derived Waste

Investigation-Derived Waste (IDW) generated during the course of the subsurface

investigation will include soil cuttings (i.e., from hand clearing, hydro-vacuum, and

drilling), purge water, personal protective equipment (PPE) and disposable sampling

equipment (i.e. filters, tubing, PVC).

Soil cuttings will be segregated in the field prior to disposal pursuant to field

screening results; segregation parameters will be of 0 parts per million (ppm)

to <100 ppm and greater than 100 ppm. One composite sample will be

collected for laboratory analysis from each staging area for every five 55 gallon

drums generated. Laboratory analysis will be utilized for the determination of

potential site re-use or offsite disposal.

Purge water generated during groundwater monitoring activities will be drummed

for off-site disposal after review of laboratory analysis.

PPE and disposal sampling equipment will be segregated and disposed of upon

review of subsurface investigation results.

2.5 Surveying

All borings and monitoring wells will be surveyed for X, Y and Z (ground surface)

coordinates referencing the National Geodetic Vertical Datum of 1929 (NGVD 29) and

North American Datum of 1983 (NAD 83) at the completion of subsurface investigation

activities.

5

Subsurface Investigation Work Plan – Work Element 2

Twin Cities Assembly Plant 966 South Mississippi River Boulevard St. Paul, Minnesota

3. Scope of Work

With consideration of former Site operations, construction, geographical layout, and

environmental activities completed to-date, the Site has been divided into 11 FAs as

depicted on Figure 2. Furthermore, the FAs have been divided into two groups (A and

B) with geographic consideration. Group A includes FA-01 through -07 and FA-09,

located east of Mississippi River Boulevard, and Group B includes FA-10 and FA-11

located west of Mississippi River Boulevard.

The total number of borings, depth, and analytical sampling requirements were

developed based on analytical results from previous investigations completed at the

Site. The investigation activities associated with this Workplan will be conducted

concurrently with remaining WE1 investigation activities. The results from WE1 were

utilized to determine the need of additional groundwater delineation, where collection of

the sample is contingent upon encountering water in the borehole. Detailed sampling

and analysis information is presented in Table 1 and presented on Figures 3 through 8.

3.1 Group A

Group A includes FA-01 through FA-09, with the exception of FA-08 (baseball fields).

Investigation results for FA-08 was addressed in 2008 and reported in the Response

Action Implementation Report – Baseball Fields – Feature 139 (ARCADIS 2008).

Investigation activities within Group A FAs will include:

Delineation of exceedances of residential Soil Reference Values (SRVs) in soil,

and

Delineation of exceedances of MDH HRLs and the USEPA Arsenic MCL in

groundwater through the installation and sampling of temporary wells.

3.2 Group B

Group B consists of FA-10 and FA-11, but only includes investigation at FA-11.

Investigation results for FA-10 were reported under separate cover to the MPCA in the

April 2014 Area C –Comprehensive Site History and Investigation Report (ARCADIS

2014). Investigation activities within Group B will include:

Delineation of exceedances of recreational SRVs in soil, and

Delineation of exceedances of MDH HRLs in groundwater through the

installation and sampling of temporary wells.

6

Subsurface Investigation Work Plan – Work Element 2

Twin Cities Assembly Plant 966 South Mississippi River Boulevard St. Paul, Minnesota

4. Reporting

The results of this investigation will be summarized in a summary report and submitted

to the MPCA. The submittal will discuss information collected during the site

characterization activities and will include a technical overview of the site

characterization, results, findings, and recommendations.

7

Subsurface Investigation Work Plan – Work Element 2

Twin Cities Assembly Plant 966 South Mississippi River Boulevard St. Paul, Minnesota

5. Scheduling

The subsurface investigation is anticipated to begin in the third quarter of 2014. The

scope of work will be completed independently within each FA when access is

available after demolition activities are complete.

8

Subsurface Investigation Work Plan – Work Element 2

Twin Cities Assembly Plant 966 South Mississippi River Boulevard St. Paul, Minnesota

6. References

ARCADIS, 2007. Field Sampling Plan, Ford Motor Company, Twin Cities Assembly

Plant, St. Paul, Minnesota. June 2007.

ARCADIS, 2008. Response Action Implementation Report – Baseball Fields –

Feature 139, Ford Motor Company, Twin Cities Assembly Plant, St. Paul, Minnesota.

March 2008.

ARCADIS, 2013. Subsurface Investigation Work Plan – Work Element 1, Ford Motor

Company, Twin Cities Assembly Plant, St. Paul, Minnesota. July 2013.

ARCADIS, 2014. Area C –Comprehensive Site History and Investigation Report, Ford

Motor Company, Twin Cities Assembly Plant, St. Paul, Minnesota. April 2014.

Tables

Table 1. Summary of Proposed Sampling Investigation

Subsurface Investigation Work Plan - Work Element 2

Twin Cities Assembly Plant, St. Paul, Minnesota

Focus Area Sample ID Comments Location ID Rationale1 Initial Number of Borings

Initial Target Depth (ft bgs)

VOCs (8260) SVOCs (8270) GRO (Wi) DRO (Wi)TAL Metals

(6010)Cyanide (335.4)

VOCs (8260) SVOCs (8270) GRO (Wi) DRO (Wi)Dissolved

TAL Metals (6010)

Dissolved Lead (6010)

Cyanide (335.4)

ASB-0115Western delineation of VOCs (Soil ) observed within the ASB-0103 (east) and ASB-0208 (south) clusters. Eastern delineation of VOCs (GW ) observed at west investigation clusters ASB-0107 and ASB-0108.

ASB-123/ASB-01036-8 / 6-7, 7-7.5, 7.5-8, 8-

8.5, 11-121 10 X X

ASB-0101NNorthern delineation of VOCs (GW) observed at ASB-0101 along the north property edge.

ASB-115/ASB-0101W 4-9 / 2-7 1 12 X X

ASB-0116Northern delineation of VOCs (Soil/GW) associated with the former transfer lines and diesel shack as defined by ASB-0202, ASB-0207, and ASB-0208 clusters.

ASB-0208N 2-3, 6-8, 8-9 1 12 X X X X X X

ASB-0117Eastern delineation of VOCs (Soil ) observed within the ASB-0103 (east) and ASB-0207 (south) clusters. Eastern delineation of VOCs (GW ) observed at west investigation clusters ASB-0107 and ASB-0108.

ASB-0207E/ASB-2028S 8-13 / 6-11 1 13 X X X X X X

ASB-0118Northern delineation of Arsenic (Soil) observed within the extent of Focus Area 7 as defined by ASB-0708 and ASB-256 through ASB-261.

ASB-0708NB 1-3 1 10 X

ASB-0212Northwestern delineation of VOCs (Soil/GW ) associated with the former transfer lines and diesel shack as defined by ASB-0202, ASB-0207, and ASB-0208 clusters.

ASB-047 5-10 1 12 X X X X X X

ASB-0213Northwestern delineation of VOCs/SVOCs/Lead (GW) observed at ASB-0107 and ASB-030.

ASB-030/AMW-17 3-8 / 2.75-7.75 1 10 X X X

ASB-0214Southwestern delineation of VOCs/SVOCs/Lead (Soil/GW ) observed at ASB-0107 and ASB-030.

Feature 5 4-6 1 10 X X X X X X

ASB-0215Eastern delineation of VOCs (Soil/GW ) associated with the former transfer lines and diesel shack as defined by ASB-0202, ASB-0207, and ASB-0208 clusters.

ASB-0207E 8-13 1 15 X X X X

ASB-0410 Northern delineation of SVOCs (Soil ) defined by ASB-0401 and ASB0404 clusters. ASB-0401 0-2, 8-10 1 10 X

ASB-0411Western delineation of SVOCs/Arsenic (Soil ) defined by ASB-0401 and ASB0404 clusters.

ASB-0401/ ASB-0404 0-2, 8-10 / 0-2, 4-6, 6-8 1 10 X X

ASB-0412 Northern delineation of Arsenic (Soil ) defined by ASB-0405 and ASB-171 clusters.ASB-165/ASB-0703N/ASB-

04050-2 / 0-2 / 1-3, 3-5 1 8 X

ASB-0413Western delineation of Arsenic (Soil) defined by ASB-0405 and ASB-171 clusters; northern delineation of SVOCs (Soil ) defined by ASB-0406 cluster.

ASB-0405/ASB-0406W 1-3, 3-5 / 2-3, 4-6 1 11 X X

ASB-0612Northern delineation of VOCs/SVOCs (Soil ) defined by ASB-0607, ASB-182, and ASB-0712 clusters.

1 8 X X

ASB-0613Eastern delineation of VOCs/SVOCs (Soil ) defined by ASB-0607, ASB-182, and ASB-0712 clusters.

1 8 X X

ASB-0614Southern delineation of VOCs/SVOCs (Soil ) defined by ASB-0607, ASB-182, and ASB-0712 clusters.

ASB-0607S 2-4, 5-7 1 8 X

ASB-0714Northern delineation of Arsenic (Soil) defined by ASB-0702, ASB-0703, ASB-0706, ASB-0707.

1 8 X

ASB-0715Eastern delineation of Arsenic (Soil) defined by ASB-0702, ASB-0703, ASB-0706, ASB-0707; northern delineation of Antimony (Soil) defined by ASB-166, ASB-167, ASB-172.

1 8 X

ASB-0716 Eastern delineation of SVOCs/Arsenic/Mercury (Soil) defined by ASB-0707 cluster. ASB-0707E 4-6 1 12 X X

ASB-1110 Western delineation of SVOCs (Soil) defined by ASB-195/ASB-1103 ASB-195/ASB-1103 6-8, 8-10 / 2-4 1 BR X X X X X X

ASB-1111 Northern delineation of MGP (Soil) 1 BR X X X X X X

ASB-1112 Northern delineation of MGP (Soil) 1 BR X X X X X X

Notes, Acronyms & Abbreviations:1 Indicates analyzed interval (ft bgs) within the original boring/well or the need for additional characterization (i.e. data gap); bolded interval indicates location of previously observed exceedances

** All temporary well groundwater samples are contingent on the presence of groundwater in the borehole

ft bgs feet below ground surface

ASB ARCADIS Soil Boring

BR Bedrock

DRO Diesel Range Organics

GRO Gasoline Range Organics

MS/MSD Matrix spike/matrix spike duplicateNA Not Applicable

PCBs Polychlorinated biphenyls

RCRA Resource Conservation and Recovery Act

SVOCs Semi-volatile organic compounds

TAL Target Analyte List

VOCs Volatile organic compounds

Wi Wisconsin

Groundwater Analytical**

1

2

ASB-1108 2-4, 20-21.5, 26-28

ASB-0607N 2-4, 5-6.5, 6.5-8

ASB-0703N/ASB-167 0-2 / 0-2, 6-8, 8-10

Original Location Drilling/Inspection Soil Analytical

4

6

7

11

G:\PROJECTS\Ford-St.Paul\07 - Reports\Work Plans\2014 Inv Work Plan - WE2\Tables\2014_06_06_WE2_ Table_ARCADIS.xlsx 1 of 1

Figures

Copyright: © 2013 National Geographic Society

0 1 2

Miles

NOTES:

Imagery Source: United States Geological SurveyHigh Resolution Orthoimagery for the Minneapolis-St. Paul,Minnesota Urban Area

Topographic Map Source: © 2007 National Geographic Society

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2) The Figure is not to be used for any Real Estate Planning or Discussion purposes.

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4) Imagery Source: MnGeo WMS service, 2010 color 7-countyhttp://geoint.lmic.state.mn.us/cgi-bin/wms? Accessed 6/6/2014

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Focus Areas Location MapDRAFT

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ASB-119

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ASB-0111

ASB-0112

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Twin Cities Assembly PlantFord Motor CompanySt. Paul, Minnesota

FIGURE3

1 inch = 130 feet

Focus Area 1 - North Parking Lot Area

0 130 26065

Feet

Ford Property Boundary

Focus Area

LEGEND:

DRAFT

NOTES: AMW = ARCADIS Monitoring WellASB = ARCADIS Soil BoringEPA = Environmental Protection AgencyHA = Hand AugerHBV = Health Based ValueHRL = Health Risk LimitMCL - Maximum Contaminant LevelMDH = Minnesota Department of HealthMPCA = Minnesota Pollution Control AgencyRAA = Risk Assessment AdviceSRV = Soil Reference ValueImagery Source: MnGeo WMS service, 2010 color 7-countyhttp://geoint.lmic.state.mn.us/cgi-bin/wms? Accessed 6/5/2014

MPCA Tier 1 Residential SRV Exceedance orMPCA Tier 2 Industrial SRV Exceedance

MDH HRL/HBV/RAA orEPA Arsenic MCL Exceedance

Work Element 2 (WE2)Delineation Location!=Monitoring Well (No Exceedance)@A

Soil Boring (No Exceedance)!?

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Twin Cities Assembly PlantFord Motor CompanySt. Paul, Minnesota

FIGURE4

1 inch = 130 feet

Focus Area 2 - Open LUST ReleasesDRAFT

0 130 26065

Feet

Ford Property Boundary

Focus Area

LEGEND: NOTES: AMW = ARCADIS Monitoring WellASB = ARCADIS Soil BoringEPA = Environmental Protection AgencyHA = Hand AugerHBV = Health Based ValueHRL = Health Risk LimitMCL - Maximum Contaminant LevelMDH = Minnesota Department of HealthMPCA = Minnesota Pollution Control AgencyRAA = Risk Assessment AdviceSRV = Soil Reference ValueImagery Source: MnGeo WMS service, 2010 color 7-countyhttp://geoint.lmic.state.mn.us/cgi-bin/wms? Accessed 6/5/2014

MPCA Tier 1 Residential SRV Exceedance orMPCA Tier 2 Industrial SRV Exceedance

MDH HRL/HBV/RAA orEPA Arsenic MCL Exceedance

Proposed Delineation Location(MPCA Approved)!?

Work Element 2 (WE2)Delineation Location!=Monitoring Well (No Exceedance)@A

Soil Boring (No Exceedance)!?

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Twin Cities Assembly PlantFord Motor CompanySt. Paul, Minnesota

FIGURE5

1 inch = 180 feet

0 180 36090

Feet

Focus Area 4 -Former Hazardous Waste Storage AreasFord Property Boundary

Focus Area

LEGEND:

DRAFT

NOTES: AMW = ARCADIS Monitoring WellASB = ARCADIS Soil BoringEPA = Environmental Protection AgencyHA = Hand AugerHBV = Health Based ValueHRL = Health Risk LimitMCL - Maximum Contaminant LevelMDH = Minnesota Department of HealthMPCA = Minnesota Pollution Control AgencyRAA = Risk Assessment AdviceSRV = Soil Reference ValueImagery Source: MnGeo WMS service, 2010 color 7-countyhttp://geoint.lmic.state.mn.us/cgi-bin/wms? Accessed 6/5/2014

MPCA Tier 1 Residential SRV Exceedance orMPCA Tier 2 Industrial SRV Exceedance

MDH HRL/HBV/RAA orEPA Arsenic MCL Exceedance

Proposed Delineation Location(MPCA Approved)!?

Work Element 2 (WE2)Delineation Location!=Monitoring Well (No Exceedance)@A

Soil Boring (No Exceedance)!?

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Twin Cities Assembly PlantFord Motor CompanySt. Paul, Minnesota

FIGURE6

1 inch = 200 feet

0 200 400100

Feet

Focus Area 6 - Former Hazardous WasteStorage and Disposal AreasFord Property Boundary

Focus Area

LEGEND:

DRAFT

NOTES: AMW = ARCADIS Monitoring WellASB = ARCADIS Soil BoringEPA = Environmental Protection AgencyHA = Hand AugerHBV = Health Based ValueHRL = Health Risk LimitMCL - Maximum Contaminant LevelMDH = Minnesota Department of HealthMPCA = Minnesota Pollution Control AgencyRAA = Risk Assessment AdviceSRV = Soil Reference ValueImagery Source: MnGeo WMS service, 2010 color 7-countyhttp://geoint.lmic.state.mn.us/cgi-bin/wms? Accessed 6/6/2014

MPCA Tier 1 Residential SRV Exceedance orMPCA Tier 2 Industrial SRV Exceedance

MDH HRL/HBV/RAA orEPA Arsenic MCL Exceedance

Proposed Delineation Location(MPCA Approved)!?

Work Element 2 (WE2)Delineation Location!=Monitoring Well (No Exceedance)@A

Soil Boring (No Exceedance)!?

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Twin Cities Assembly PlantFord Motor CompanySt. Paul, Minnesota

FIGURE7

1 inch = 150 feet

Focus Area 7 - Railroad Tracks

0 150 30075

FeetFord Property Boundary

Focus Area

LEGEND:

DRAFT

NOTES: AMW = ARCADIS Monitoring WellASB = ARCADIS Soil BoringEPA = Environmental Protection AgencyHA = Hand AugerHBV = Health Based ValueHRL = Health Risk LimitMCL - Maximum Contaminant LevelMDH = Minnesota Department of HealthMPCA = Minnesota Pollution Control AgencyRAA = Risk Assessment AdviceSRV = Soil Reference ValueImagery Source: MnGeo WMS service, 2010 color 7-countyhttp://geoint.lmic.state.mn.us/cgi-bin/wms? Accessed 6/6/2014

MPCA Tier 1 Residential SRV Exceedance orMPCA Tier 2 Industrial SRV Exceedance

MDH HRL/HBV/RAA orEPA Arsenic MCL Exceedance

Work Element 2 (WE2)Delineation Location!=Monitoring Well (No Exceedance)@A

Soil Boring (No Exceedance)!?

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Twin Cities Assembly PlantFord Motor CompanySt. Paul, Minnesota

FIGURE8

1 inch = 130 feet

0 130 26065

Feet

Focus Area 11 - Wastewater Treatment PlantFord Property Boundary

Focus Area

LEGEND:

DRAFT

NOTES: AMW = ARCADIS Monitoring WellASB = ARCADIS Soil BoringEPA = Environmental Protection AgencyHA = Hand AugerHBV = Health Based ValueHRL = Health Risk LimitMCL - Maximum Contaminant LevelMDH = Minnesota Department of HealthMPCA = Minnesota Pollution Control AgencyRAA = Risk Assessment AdviceSRV = Soil Reference ValueImagery Source: MnGeo WMS service, 2010 color 7-countyhttp://geoint.lmic.state.mn.us/cgi-bin/wms? Accessed 6/6/2014

MPCA Tier 1 Residential SRV Exceedance orMPCA Tier 2 Industrial SRV Exceedance

MDH HRL/HBV/RAA orEPA Arsenic MCL Exceedance

Proposed Delineation Location(MPCA Approved)!?

Work Element 2 (WE2)Delineation Location!=Monitoring Well (No Exceedance)@A

Soil Boring (No Exceedance)!?

khoehn
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