appendix 11 dupont louviers/mbna - dnrec...the dupont louviers/mbna site is currently owned by the...

PCB Mass Loading Phase IIDuPont Louviers/MBNASIRS ID: DE-1049Newark, Delaware

Appendix 11

DUPONT LOUVIERS/MBNANEWARK, DELAWARE

SIRS ID: DE-1049


GENERAL SITE INFORMATIONSite Name: Dupont Louviers/MBNA

SIRS ID Number: DE-1049

Site Location and Description:

The DuPont Louviers/MBNA site is located at 655 Paper Mill Road in Newark, Delaware. The site is approximately 60.3 acres in size and is comprised of one tax parcel (#0804600008)located in the southwest quadrant created by the intersection of Paper Mill Road and Thompson Station Road (Figure 1). The property is bounded to the north by Thompson Station road, beyond which is state parkland; to the east by Paper Mill Road, beyond which are commercial and residential properties; to the south by wooded land and a small commercial office complex;and to the west by state parkland. The head of an unnamed, perennial tributary of White Clay Creek is located approximately 1,000 feet west of the western site boundary; this tributary discharges into White Clay Creek approximately 3,000 feet from the same site boundary. Two other unnamed tributaries have headwaters within 1,000 feet of the site boundary; however, these other tributaries flow further to discharge into the White Clay Creek. Northwest of the site is a golf course, formerly associated with the DuPont Louviers/MBNA site, but outside the scope of this and historical environmental investigations. The surrounding land is generally recreational, residential, and commercial.

Based on the 1994 Phase II Environmental Assessment, surface water from the Site flows westward to southwestward into the White Clay Creek.

The DuPont Louviers/MBNA site is currently owned by the Bracebridge Corporation, and occupied by Bank of America. Bracebridge purchased the property from DuPont in 1994 for use as office space. At present, only two original office buildings from the DuPont era remain. Alarge office building, the Engineering Test Center (ETC), was demolished immediately prior to the 1994 sale, and a smaller building has been constructed in a previously undeveloped area on site. The three office buildings (and several smaller buildings and support structures) are located centrally on the site, with parking lots and landscaped areas covering the remainder of the site.

The current facility was constructed beginning in 1952, with additions and new buildings being added through 2001. As part of the terms of the 1994 sale to Bracebridge, the ETC and several

File: 0985.69.51 Page 1 of 11 June 2014


associated buildings were demolished, and six areas of soil were excavated and removed from the site for disposal. In the decade prior to the sale, several USTs and ASTs were identified on site. All USTs that were removed were subsequently granted No Further Action (NFA) letters by DNREC-Tank management Branch.

Previous Site Uses:

The site was previously utilized for engineering, testing, and design operations, but most recently has been maintained as an office complex (Bank of America, formerly MBNA). The property historically was vacant land/farmland under the ownership of the Philadelphia, Baltimore, and Washington Railroad, before being purchased by DuPont in the early 1950’s. The site was developed incrementally, with the first structure being built in 1952.

Site Regulatory Status:

This section briefly summarizes previous investigations performed on the site through the SIRSprogram. A current SIRS regulatory status is also included.

Sampling Event (DuPont Environmental Sampling Service, 1988)

In August 1988, DuPont Environmental Sampling Service prepared a report detailing sampling activities at the Louviers Rod and Gun club (located adjacent to the Engineering Test Center).The sampling was performed primarily to determine the nature and extent of the impacts of lead shot contamination from the trap, skeet, and target ranges. The investigation included the sampling of soil, sediment, and surface water to the areas north and west of the range. Two surface soil samples were also collected from the “old disposal area” to the east of the range and analyzed for priority pollutant metals and select volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs). No samples were screened or analyzed for PCBs, and the limited hydrogeological data collected from three shallow soil borings was too limited to be extrapolated to site-wide conditions. Data from this report was not incorporated into the PCB Mass Loading database.

Report of Investigation: DuPont Louviers Site/USTs 6, 7 and 8 (DuPont Environmental Field Service, 1991)

In December 1991, DuPont Environmental Field Service (DEFS) prepared a report detailing sampling activities related to the removal of three USTs during October 1990 on the DuPont Louviers property. Two USTs (identified as UST #7 and #8) were removed from the extreme

File: 0985.69.51 Page 2 of 11 June 2014


western edge of the DuPont property, at the water treatment plant located in the floodplain of the White Clay Creek. The third UST (UST # 6) was removed from an area adjacent to a pump house, near the ETC. Fourteen soil borings were advanced at the site of the former UST#6 , and nine soil borings were advanced at the site of the former USTs #7 and #8. In total, 34 soil samples were collected, including 3 composite samples of excavated soil stockpiles associated with the UST excavations. Additionally, a surface water sample and groundwater sample from aUST #7/#8 boring were collected. Based on the report and supporting field logs, no groundwater was identified in soil borings associated with UST #6 (located near the ETC). No samples were screened or analyzed for PCBs. Data from this report was not incorporated into the PCB Mass Loading database.

Phase I Environmental Site Assessment: DuPont Louviers Site (DuPont Environmental Remediation Service, 1994)

In April 1994, DuPont Environmental Remediation Service (DERS) prepared a Phase I Environmental Site Assessment in anticipation of the sale of the DuPont Louviers property. At the time of the report, there was one transformer outside which had a PCB concentration low enough to be considered non-PCB and all other transformers outside had the PCB-containing oils replaced with PCB-free oil. However, there were a few transformers in the Louviers Office Building which had PCB-containing oils. Additional potential sources of PCBs were some capacitors on site and the lighting ballasts in some of the non-public areas. The report made several recommendations based on the potential for environmental impacts at several areas of the site:

Sample soil for PCBs at the electrical substation north of the ETC.Perform tightness testing of the two active USTs near the ETC/Louviers office building.Sample soil to the west of the ETC, in the vicinity of the welding laboratory, sandblasting area, gun club area, and down gradient of an area where environmental field equipment had been rinsed.Drain the acid sump and sample for pH, as well as sample the pH of soil down gradient of the acid loop.Sample soil beneath an AST near the ETC, at a depth equal to or greater than associated underground piping.

File: 0985.69.51 Page 3 of 11 June 2014


Sample soil in the vicinity of the former and current drum storage pad, beneath the cyclonic incinerator, and near the Particle Processing Grinding (PPG) shed.Collect a background sample to determine a baseline of soil metals on the site.

Louviers Building Area and Engineering Test Center Phase II Environmental Assessment: DuPont Louviers Site (DERS, 1994)

In July 1994, DERS completed a Phase II Environmental Assessment of the DuPont Louviers/MBNA site. The investigation scope was limited to the areas immediately in and around the office buildings and support structures; the investigation did not include the water treatment plant or golf course areas. The assessment was performed to determine the nature and extent of any contamination associated with activities at the ETC, and was guided by the recommendations of the DERS and Duffield Phase I Assessments. A total of 27 soil samples were collected from the DuPont Louviers/ETC site. Only two samples (LS-1 and LS-2) were submitted for PCB analysis. Both samples were collected from locations adjacent to the transformer pads at the electrical substation and lab analysis revealed elevated PCB concentrations. LS-1 was found to contain Aroclor 1254 at a concentration of 0.3 mg/kg. LS-2was found to contain Aroclor 1260 at a concentration of 1.4 mg/kg. The DNREC unrestricted URS at the time was 0.3 mg/kg for Aroclor 1254/Aroclor 1260. The unrestricted URS was not exceeded.

Based upon the completed Phase II Environmental Assessment, DERS recommended further investigation of the substation area only if residential development (unrestricted use) was anticipated at the site.

Louviers Building Area and Engineering Test Center Phase II EnvironmentalAssessment: DuPont Louviers Site (Duffield, 1995)

The Duffield Phase II assessment was performed on behalf of MBNA to determine if environmental issues could affect their future ownership and redevelopment. The full report was not available at the time of this report but the data available on the DNREC Environmental Navigator was utilized in this analysis.

File: 0985.69.51 Page 4 of 11 June 2014


Assessment and Removal of Soil at the Former DuPont Engineering Test Center (DERS and Duffield, 1996)

Between January and February 1995, DuPont conducted a limited excavation of soils in the vicinity of the ETC. Soil removal was targeted to discrete areas based on detections of metals, polycyclic aromatic hydrocarbons (PAHs), petroleum, and pesticides. Areas A, B, C, D, E, and F were excavated to depths ranging from 1 foot below grade to over 4 feet below grade. Soils where PCBs were detected (adjacent to the electrical substation) were not excavated. All areas excavated were subsequently backfilled with clean fill and either graded and landscaped or paved with concrete or asphalt. Sidewalls and floors of the excavated areas were subjected to additional sampling to ensure that targeted contaminants were removed or reduced to acceptable levels. Because none of the target contaminants were PCBs, no confirmatory PCB sampling was conducted. The PCB-impacted soil was permitted to remain in place undisturbed since the new occupants planned to use the site as a commercial office complex.

Current Regulatory Status:

Documents from the DNREC Environmental Navigator show correspondences from March 1996discussing whether or not to issue a No Further Action letter, but there is no record of a letter being issued in the files.

File: 0985.69.51 Page 5 of 11 June 2014


SUMMARY OF SITE PCB INFORMATIONSite Investigation PCB Findings:

PCBs were detected in surface soil at two locations, LS-1 (0.5 to 1.0 feet below ground surface (bgs)) and LS-2 (0.5 to 1 feet bgs) at concentrations of 0.3 mg/kg and 1.4 mg/kg, respectively.PCBs were not detected in the unsaturated subsurface soil. No saturated subsurface soil sampleswere analyzed for PCBs.

Due to the fact that there were only two detections in the subsurface saturated soil, the maximum detected value (1.4 mg/kg) was used in the calculations instead of calculating the 95% upper confidence limit (UCL) of the mean across the site. Groundwater samples were not analyzed for PCBs.

Concentrations of PCBs on Site

Sample Matrix CorrespondingFigure

Analytical Methods Range of Total PCBs

Surface Soil Figure 2 Method 8082 Not detected to 1.4 mg/kgSubsurface Soil

(unsaturated)Figure 3 Method 8082 Not Detected

Subsurface Soil (saturated)

Figure 4 Not Analyzed Not Analyzed

Groundwater Figure 5 Not Analyzed Not AnalyzedA summary of all samples collected for PCB analyses are presented in Table 1.

Acreage where PCBs detected:

The estimated surface soil area impacted by PCBs is 21.9 acres in the vicinity of LS-1 and LS-2(Figure 2). The impacted area may be overestimated due to the lack of additional PCB analytical data in the vicinity of LS-1 and LS-2. This uncertainty is reflected in the uncertainty analysis, where the average number of samples per acre is calculated as less than 1. Based on the data available and reviewed by BrightFields, the subsurface unsaturated soil is not impacted by PCBs.Since no saturated subsurface soil samples or groundwater samples were analyzed for PCBs, BrightFields cannot determine the respective areas impacted by PCBs.

According to the information available and reviewed by BrightFields, no subsurface saturatedsoil or groundwater samples were analyzed for PCBs so the respective areas impacted by PCBs cannot be determined. Therefore, no groundwater loading estimates were prepared for the site.

File: 0985.69.51 Page 6 of 11 June 2014


PCB Remediation Status:

PCB remediation is not presently required for the DuPont Louviers/MBNA site.

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PCB MASS LOADING SUMMARYThe PCB mass loading rate to surface water via overland flow was estimated for the DuPont Louviers/MBNA Property. No samples from the subsurface saturated zone or the groundwaterwere analyzed for PCBs; therefore, groundwater transport cannot be evaluated as a mechanism of transport for PCBs at the Property. A summary of the results is included below and the details of the calculations are included as attachments to this Appendix.

Overland Flow:

Overland flow has been determined on this site by using the Revised Universal Soil Loss Equation (RUSLE). The RUSLE predicts the long term average annual rate of erosion on an area based on rainfall patterns, soil type, topography, cover/canopy factors and support management practices. These specific factors are site specific and rely on local information of the site. A breakdown of the individual factors is presented below with a brief explanation of their choice.

Ground Cover and Canopy:

The surface cover and flow paths were assessed through aerial photography and available contour mapping (Delaware Data Mil, 2007). The cover/management factor (C) assigned to the erodible area and associated flow paths was 0.003, which corresponds to a vegetative cover of grass like vegetation over greater than 95% of the area.

Site Sediment and Erosion Control Practices:

Based on the aerial photography evaluation and review of site documents it does not appear that any sediment and erosion control practices are being implemented on Site.

Input Factors and Results:

A breakdown of the individual factors is presented below with a brief explanation of their choice.

File: 0985.69.51 Page 8 of 11 June 2014


DuPont Louviers/MBNA

RUSLE Factors Values Provided Explanation of choice

R = rainfall-runoff erosivity index (102 ft-tonf-in/ac-hr-yr) 175

An appropriate value for R for the Site was determined using the Isoerodent Map of the Eastern U.S. from the Stormwater Phase II Final Rule Construction Rainfall Erosivity

Waiver (USEPA, 2012).

K = soil erodibility (0.01 ton-ac-hr/ac-ft-tonf-in) 0.28

The soil erodibility factors were selected from the National Resource Conservation

Soil Survey Geographic Database (SSURGO) and a raster was generated using

the values 0.28 and 0.32, with a weighted average of 0.28.

ls = topographic factor (dimensionless) 0.18

The topographic factor was derived based on the slope and flow accumulation grids

created in ArcGIS. An output LS grid was created and the average value for the grid is

provided.

C = cover/management factor (dimensionless) 0.003

The cover/management factor C assigned to the erodible area was 0.003, which

corresponds to a vegetative cover of grass like vegetation over greater than 95% of the

area.

P = support practice factor (dimensionless) 1

No documentation was provided indicating that any sediment and erosion controls are in

place.

A = average annual soil loss estimate (ton/ac-yr) 0.048

The average soil loss estimate was generated by ArcGIS using the input factors

listed above.

Erodible Area (acres) 8.9The erodible area was calculated based on

the pervious surfaces within the area of concern polygon for surface soil (Figure 6).

For factors that were not consistent across the site, rasters were used to characterize the variations. Due to the methodology utilized to derive the soil loss estimate, the numbers listed above cannot simply be multiplied.

The total estimated PCB loading via overland flow for the DuPont Louviers/MBNA Property is 0.54 grams per year. Please see attached table for specific variables.

File: 0985.69.51 Page 9 of 11 June 2014


Uncertainty Analysis Associated with Overland Flow:

Specific Areas and Degree of Uncertainty for the DuPont Louviers/MBNA

* Primary analysis used in the historical samples

Sources of uncertainty for the DuPont Louviers/MBNA site include: All of the data analyzed was Aroclor laboratory data. Most of the sample locations were from scaled maps and two samples did not have a sample location figure. Based on this evaluation the level of uncertainty associated with overland flow PCB mass loading from the DuPont Louviers/MBNA site is Moderate.

Groundwater Discharge Analysis:

No groundwater discharge analysis was performed for this site.

Samples Per Acre (site)

Chemical Data

Quality*Soil Type Site

CoverageMap

Quality

Distance to Discharge

PointSite Specific Information 0.60 Aroclor

DataSoil

Database

Based on a thorough site assessment

Okay Scaled Map; No Figure

Approximately 3,250 feet

Degree of Uncertainty High Moderate Low Low Moderate High

File: 0985.69.51 Page 10 of 11 June 2014


Site References:

Delaware Geological Survey, 2013, Delaware Data Mil,<http://datamil.delaware.gov/geonetwork/srv/en/main.home>, May 2013.

DuPont Environmental Field Service, 1991, Report of Investigation, DuPont Louviers Site, USTs 6, 7, 8, December 1991.

DuPont Environmental Remediation Services, 1994, Phase I Environmental Site Assessment, DuPont Louviers Site, April 1994.

DuPont Environmental Remediation Services, 1994, Louviers Building Area and Engineering Test Center, Phase II Environmental Assessment, July 1994.

DuPont Environmental Remediation Services, 1996, Assessment and Removal of Soil at the Former Louviers Engineering Test Center, January 1996.

DuPont Environmental Sampling Service, 1988, Louviers Site, August 1988.

File: 0985.69.51 Page 11 of 11 June 2014


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- ND

(4')

TBE-

3 - N

D (4

' - 6

')TB

E-3

- ND

(8' -

10'

)

TBE-

1 - N

D (4

' - 6

')TB

E-1

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(9' -

11'

)

TBE-

6/S

-2 -

ND

(4' -

6')

TBE-

6/S

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ND

(8' -

10'

)TB

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S-4

- N

D (1

3' -

15')

TBE-

5 - N

D (2

' - 4

')TB

E-5

- ND

(4' -

6')

TBE-

5 - N

D (8

' - 9

')TB

E-5

- ND

(13'

- 15

')

TBE-

2B -

ND

(4' -

6')

TBE-

2B -

ND

(9' -

11'

)TB

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- N

D (1

5' -

16')

Not

es:

N

D (0

.5' -

1')

- Not

Det

ecte

d an

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mpl

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.

Sour

ce: D

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9700

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tribu

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ubsu

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Sat

urat

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oil

DuP

ont L

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MB

NA

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ark,

Del

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e

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raw

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Dat

e

Proj

ect #

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e:Fi

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JPR 09

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re 4

060

120 Fe

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19/2

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6/19

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1,44

0D

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Dat

e

Proj

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No.

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stim

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DuP

ont L

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ark,

Del

awar

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ByD

raw

nC

heck

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Dat

e

Proj

ect #

Scal

e:Fi

le N

ame:

Fig.

No.

ADS

KEP 09

85.6

9.51

Figu

re 6

095

190 Fe

et

Fig6

Soi

lLos

s.m

xd

Del

awar

eB

ayM

DD

E

NJ

Site

Loc

atio

n

PA

/6/

19/2

014

6/19

/201

41:

2,28

0

Sour

ce: D

elaw

are

Dat

aMIL

- A

eria

l 201

2, T

ax P

arce

ls.

Ove

rland

Flo

w

DuP

ont L

ouvi

ers/

MB

NA

Site

Bou

ndar

yTa

x P

arce

lsTo

ns/Y

ear/A

cre

of S

oil L

oss

Est

imat

edH

igh

: 7.4

1

Low

: 0


Table

Tabl

e 1

PCB

Ana

lytic

al R

esul

ts F

or S

oil

DuP

ont L

ouvi

ers/

MB

NA

(DE-

1049

)N

ewar

k, D

E

Brig

htFi

elds

Pro

ject

#: 0

985.

69.5

1P

age

1 of

1Ju

ne 2

014

ETC

-10'

- 0.

5'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

ETC

-3A

1.5'

- 2'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

UE

TC-1

10'

- 0.

5'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

ETC

-22

0' -

0.5'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

UE

TC-2

50'

- 0.

5'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

ETC

-26

0' -

0.5'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

ULS

-10.

5' -

1'D

uPon

tLo

uvie

rs B

uild

ing

Are

a an

d E

ngin

eerin

g Te

st C

ente

r Pha

se II

Env

ironm

enta

l Ass

essm

ent

Jul-9

40.

2U

0.2

U0.

2U

0.2

U0.

2U

0.3

0.2

ULS

-20.

5' -

1'D

uPon

tLo

uvie

rs B

uild

ing

Are

a an

d E

ngin

eerin

g Te

st C

ente

r Pha

se II

Env

ironm

enta

l Ass

essm

ent

Jul-9

40.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U1.

4S

pl.A

0'D

uPon

t and

Duf

field

Ass

ocia

tes

Ass

essm

ent a

nd R

emov

al o

f Soi

l at t

he F

orm

er D

uPon

t Eng

inee

ring

Test

Cen

ter

Jan-

960.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

Spl

.B0'

DuP

ont a

nd D

uffie

ld A

ssoc

iate

sA

sses

smen

t and

Rem

oval

of S

oil a

t the

For

mer

DuP

ont E

ngin

eerin

g Te

st C

ente

rJa

n-96

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

US

pl.C

0'D

uPon

t and

Duf

field

Ass

ocia

tes

Ass

essm

ent a

nd R

emov

al o

f Soi

l at t

he F

orm

er D

uPon

t Eng

inee

ring

Test

Cen

ter

Jan-

960.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

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.D0'

DuP

ont a

nd D

uffie

ld A

ssoc

iate

sA

sses

smen

t and

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oval

of S

oil a

t the

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mer

DuP

ont E

ngin

eerin

g Te

st C

ente

rJa

n-96

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

US

pl.E

0'D

uPon

t and

Duf

field

Ass

ocia

tes

Ass

essm

ent a

nd R

emov

al o

f Soi

l at t

he F

orm

er D

uPon

t Eng

inee

ring

Test

Cen

ter

Jan-

960.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

TBE

-10'

- 2'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

UTB

E-1

4' -

6'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

TBE

-19'

- 11

'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

TBE

-23'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

UTB

E-2

4'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

TBE

-2A

0' -

2'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

TBE

-2B

0' -

2'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

TBE

-2B

15' -

16'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

UTB

E-2

B4'

- 6'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

UTB

E-2

B9'

- 11

'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

TBE

-30'

- 2'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

UTB

E-3

4' -

6'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

TBE

-38'

- 10

'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

TBE

-40'

- 2'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

UTB

E-4

4' -

6'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

TBE

-513

' - 1

5'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

TBE

-52'

- 4'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

UTB

E-5

4' -

6'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

TBE

-58'

- 9'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

UTB

E-6

/S-1

0' -

2'D

uffie

ld A

ssoc

iate

sD

uffie

ld P

hase

II19

940.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

TBE

-6/S

-24'

- 6'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

UTB

E-6

/S-3

8' -

10'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

UTB

E-6

/S-4

13' -

15'

Duf

field

Ass

ocia

tes

Duf

field

Pha

se II

1994

0.2

U0.

2U

0.2

U0.

2U

0.2

U0.

2U

0.2

U

Qua

lifie

rs:

Bol

d an

d sh

aded

- E

xcee

ds D

NR

EC

-SIR

S J

anua

ry 2

014

Scr

eeni

ng L

evel

sU

- S

ampl

e no

t det

ecte

d ab

ove

the

labo

rato

ry m

etho

d de

tect

ion

limit

Rep

ort D

ate

bgs

- Bel

ow g

roun

d su

rface

Sam

ple

Iden

tific

atio

n

Sam

ple

Dep

th (f

eet

bgs)

Sam

plin

g C

ompa

nyR

epor

t Nam

e

Not

e: A

ll re

sults

repo

rted

in m

g/kg

.

0.22

Aro

clor

-101

6A

rocl

or-1

221

Aro

clor

-123

2A

rocl

or-1

242

Aro

clor

-124

8A

rocl

or-1

254

Aro

clor

-126

0D

NR

EC-S

IRS

Scre

enin

g Le

vel

(Jan

uary

201

4)

(mg/

kg)

DN

REC

-SIR

S Sc

reen

ing

Leve

l (J

anua

ry 2

014)

(m

g/kg

)0.

390.

140.

140.

220.

220.

11

DN

REC

-SIR

S Sc

reen

ing

Leve

l (J

anua

ry 2

014)

(m

g/kg

)

DN

REC

-SIR

S Sc

reen

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Leve

l (J

anua

ry 2

014)

(m

g/kg

)

DN

REC

-SIR

S Sc

reen

ing

Leve

l (J

anua

ry 2

014)

(m

g/kg

)

DN

REC

-SIR

S Sc

reen

ing

Leve

l (J

anua

ry 2

014)

(m

g/kg

)

DN

REC

-SIR

S Sc

reen

ing

Leve

l (J

anua

ry 2

014)

(m

g/kg

)


Site Photographs


Parking lot in the eastern corner of the site which slopes and then back up in the southwesterndirection.

Gently sloped parking lot lined with trees in the southern corner of the site.


Parking lot in the southern corner of the site which is sloped down away from the buildings.

Drainage ditch in the southwestern portion of the site between two parking lots.


The western corner of the site at the edge of the parking lot where there is a grassy hill and a wooded area. There is also another drainage ditch which runs parallel to the parking lot edge.

A side view of the drainage ditch looking northeast.


An additional parking lot in the distance located at a lower elevation in the northern corner of the site.

The additional parking lot in the northernmost region of the site which is sloped down towards the north.


Land outside of the main building in the northwestern portion of the site sloped down steeply towards the north.


Overland Flow Calculations

PCB Loading Calculations from the Revised Universal Soil Loss Equation (RUSLE)DuPont Louviers/MBNA (DE-1049)

Newark, DE

BrightFields File #: 0985.69.51 Page 1 of 1 June 2014

Surface PCB Concentration 1.4 mg/kg

Symbol Factor Value Units

R Rainfall/Runoff Erosivity Index 175 102 ft-tonf-in/ac-hr-yr

K Soil Erodibility 0.28 0.01 ton-ac-hr/ac-ft-tonf-in

Erodible Area 8.9 Acres

LS Topographic Factor 0.18 Dimensionless

C Cover and Management Factor 0.003 Dimensionless

P Support Practice Factor 1 Dimensionless

A Average Annual Soil Loss 0.048 ton/ac-yr

PCB Loading via Overland Flow 0.54 grams/year - PCBs


Groundwater Transport Calculations(Not Applicable)