APPENDIX G Geologic Cross Sections

EX-4

EX-3

EX-2EX-1

MW-2MW-1

EP-8

EP-7

EP-6

EP-5

EP-4

EP-3

EP-1

EM-7

EM-6

EM-5

EM-4

EM-2

MW-49

EP-99

EP-98

EP-97

EP-96

EP-95

EP-94

EP-93

EP-89

EP-88

EP-86

EP-85

EP-84

EP-83

EP-82

EP-81

EP-80

EP-79

EP-78

EP-77

EP-76EP-75

EP-72

EP-71

EP-70

EP-68

EP-67

EP-66

EP-65EP-64

EP-63

EP-62

EP-60

EP-59 EP-58EP-57

EP-56

EP-54

EP-53

EP-52

EP-51

EP-50

EP-49

EP-48

EP-47

EP-46EP-45

EP-42EP-41

EP-40

EP-39EP-38EP-37

EP-35

EP-29

EP-26EP-25

EP-24

EP-23

EP-22

EP-21

EP-20

EP-14

EP-13

EP-12

EP-85D

MW-131

EP-15R

EP-137

EP-136

EP-135

EP-134

EP-133

EP-132

EP-130

EP-129

EP-128

EP-127

EP-126

EP-124

EP-123

EP-122

EP-121

EP-120

EP-119

EP-118

EP-117EP-116

EP-115EP-114

EP-113

EP-112

EP-111

EP-110

EP-109

EP-108

EP-100

MW-132S

EP-122D EP-61

EP-44

EP-43 EP-36

EP-34

EP-33EP-32

EP-31EP-30

EP-28

EP-19

EP-18

EP-17

EP-11

EP-10

EP-87

EPH-02

EPH-01

PBA-02

PBA-12

EP-125

EP-73EP-27

EM-1

EP-106EP-105

EP-104

EP-103

EP-131EP-74

EP-90

EP-102EP-101

EM-3

EP-107

EX-9

EP-9

EP-16

EP-69

EP-55

EPA-31

EPA-30

EPA-28 EPA-29

EPA-08

EPA-07

EPA-01

EPA-02

EPA-05

EPA-04

EPA-06

PBA-SB14

PBA-SB11

EPA-03

PBA-SB18

PBA-SB17

PBA-SB16

PBA-SB15

PBA-SB01

PBA-SB13

PBA-SB12

PBA-SB10PBA-SB09

PBA-SB08PBA-SB07

PBA-SB06PBA-SB05

PBA-SB04PBA-SB03

PBA-SB02

PBA-Coring

N'

A

B'

C'

K'

J'

M'

I

D'

E'

F'

G'H

L'

I'

GL

J

FE

C

D

K

N

H'

B

A'

M

0 600 1,200Feet

CIT

Y: H

ighl

ands

Ran

ch D

IV/G

RO

UP

: G

IS D

B: B

G

Doc

umen

t Pat

h: G

:\GIS

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12/

11/2

014

GRAPHIC SCALE

FORMER EL PASO SMELTER SITEEL PASO, TEXAS

PLAN VIEW - CROSS SECTION LAYOUT

FIGUREG1-1

LEGEND:

Historic Arroyo Trace Lines

Property BoundaryHistorical Drainage Divide

Cross-Section A-N

Rio Grande

Americ

an Ca

nal

Monitoring WellsAbandoned Monitoring WellsSoil Borings

Existing Conditions

Paved Areas Completed to Category II Remediation Standard

Buildings

Lined Landfill Cell

Lined Stormwater Pond

Asphalt Areas from Site Operations

See figure E1-2

A

B'

K'

M'

I

J

C

D

K

B

A'

EX-2EX-1

EP-92

MW-49

PBA-6

PBA-5

PBA-2

EP-99

EP-88

EP-85

EP-81

EP-79

EP-78EP-76

EP-75

EP-54

EP-53

EP-52

EP-51

EP-49

EP-24

EP-22EP-157

EP-150

EP-149EP-148

EP-142

EP-141EP-140

EP-156

EP-155

EP-153

EP-154

EP-147

EP-146

EP-145EP-144

PBA-13

PBA-12

PBA-08

PBA-07

EP-135

EP-126EP-123

EP-115

EP-114

EP-100

EP-156R

EP-143

EP-139

EP-138

PBA-10

EP-151D

EP-152D

EP-141B

EP-141C

EP-141A

EP-140C

EP-140B

EP-140A

EP-139R

EP-138R

EP-152S

EP-151S

EP-150CS

EP-150CDEP-150BD

EP-150BS

EP-150ADEP-150AS

EX-3

EP-73

EP-60

EP-57

EP-55

EP-27

EP-25

EP-23EP-21

EP-125

EP-85D

PBA-SB16

PBA-SB15PBA-SB14

PBA-SB11

PBA-SB01

EPH-SB01

PBA-SB12

PBA-SB09

PBA-SB08

PBA-SB07

PBA-SB05

PBA-SB04

PBA-SB03PBA-Corin g

PBA-SB18

PBA-SB17

PBA-SB13

PBA-SB10

PBA-SB06

PBA-SB02

TP-9

TP-8 TP-7

TP-6

TP-5

TP-4TP-3

TP-2

TP-1

TP-30TP-29

TP-26

TP-24TP-23TP-21TP-20

TP-19

TP-18

TP-17

TP-14TP-13

TP-12TP-11

TP-10

TP5-02S

TP20-02S

TP19-02S

TP13-02S

TP-28

TP-27TP-25

TP-22TP-16

TP-15

TP16-02S

0 200 400Feet

CIT

Y: H

ighl

ands

Ran

ch D

IV/G

RO

UP

: G

IS D

B: B

G

Doc

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xd D

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12/

10/2

014

GRAPHIC SCALE

FORMER EL PASO SMELTER SITEEL PASO, TEXAS

EXPANDED VIEW – PARKER BROTHERS ARROYO

FIGU REG1-2

LEGEND:

Historic Arroyo Trace Lines

Property Boundary

Historical Drainage Divide

Cross-Section A-N

Monitoring WellsAbandoned Monitoring WellsSoil Borings

Existing Conditions

Paved Areas Completed to Category II Remediation Standard

Buildings

Lined Landfill Cell

Lined Stormwater Pond

Asphalt Areas from Site Operations

Test Pit Locations

G

3660

3670

3680

3690

3700

3710

3720

3730

3740

3750

3760

3770

3780

3790

3800

3660

3670

3680

3690

3700

3710

3720

3730

3740

3750

3760

3770

3780

3790

3800

0 100 200 300 400 500 600 700 750

SLAG

SAND/GRAVEL

EX

-3

WELL/BORING ID

TD=85' TOTAL DEPTH OF BOREHOLE IN

FEET BELOW GROUND SURFACE

LEGEND

B B'

(South)(North)

TD=40'

PB

A-0

6 (T

EM

P W

EL

L)

TP

-1

8

TD=3'

PB

A-0

4

TD=6'

TP

-1

7

TD=4'

TP

-1

6

TD=6'

TD=20'

PB

A-0

5B

(T

EM

P W

EL

L)

TD=40'

EP

-8

5/8

5D

TD=50'

EX

-3

TD

=1

0'

TP

-1

5

SAND/GRAVEL

SHALE

?

?

?

?

?

RECENT WL

ARSENIC CONCENTRATION

IN SOILS (mg/kg)

ARSENIC CONCENTRATION

IN GROUNDWATER (mg/L)

0 80 160

HORIZONTAL SCALE IN FEET

0 20 40

VERTICAL SCALE IN FEET

NOTES:

NORTHING AND EASTING COORDINATES ARE TEXAS

STATE PLANE, CENTRAL ZONE (NAD 83 DATUM) AND

ARE IN U.S. SURVEY FEET.

ELEVATIONS ARE BASED ON NGS VERTICAL CONTROL

MONUMENT Q460. RECORD ELEVATION IS 3738.19

(NAVD 88 DATUM).

1.

2.

MEASURING POINT FOR ALL WELLS IS TOP OF CASING

ON THE NORTH SIDE.

3.

K>24HYDRAULIC CONDUCTIVITY (K)

VALUES IN FEET/DAY

DEFINITION:

GROUNDWATER

ELEVATION (DATE)

(P

RO

JE

CT

ED

LO

CA

TIO

N)

(P

RO

JE

CT

ED

LO

CA

TIO

N)

(9/11)

(6/11)

(6/11)

?

?

?

SLAG

SANDSTONE

SANDSTONE

?

?

?

?

?

?

?

?

?

?

?

WELL SCREEN (BLUE INDICATES

WELLS IN SEMI-ANNUAL

MONITORING NETWORK)

ESTIMATED CURRENT

WATER TABLE

K>116

K>24

VERTICAL EXAGGERATION (VE)=4x

EL

EV

AT

IO

N, F

EE

T (A

MS

L)

EL

EV

AT

IO

N, F

EE

T (A

MS

L)

(9/11)

AMSL = ABOVE MEAN SEA LEVEL

WL = WATER LEVEL

=<0.01 mg/L

TOTAL ARSENIC

CONCENTRATIONS

IN GROUNDWATER

EPA Arsenic Maximum

Contaminant Level

(MCL) =0.01 mg/L

=>0.01 mg/L

=>0.1 mg/L

=>1.0 mg/L

=>10 mg/L

(8/05)

(9/11)

SANDSTONE BEDROCK

(MOJADO FORMATION)

SHALE BEDROCK

(MESILLA VALLEY

FORMATION)

CROSS-SECTION B-B'

EL PASO SMELTER SITE

EL PASO, TEXAS

G1-4

3680

3690

3700

3710

3720

3730

3740

3750

3760

3770

3780

3790

3800

3680

3690

3700

3710

3720

3730

3740

3750

3760

3770

3780

3790

3800

0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300

C'

(West)

PB

A-02

PB

A-12

TP

-24

TP

-23

TP

-22

PB

A-10

EX

-3

EP

-85/85D

TP

-15

PB

A-05B

(T

EM

P W

ELL)

PB

A-06 (T

EM

P W

ELL)

TP

-14

TP

-13

TP

-6

PB

A-07

TP

-5

EX

-2

OB

S-1

EX

-1

EP

-122D

SS

IA

5-17

EP

-122 IN

J2

EP

-122 O

BS

1

EP

-122 O

BS

2

EP

-122 O

BS

4

PZ

-1

PZ

-3

MW

-1

ELE

VA

TIO

N, F

EE

T (A

MS

L)

ELE

VA

TIO

N, F

EE

T (A

MS

L)

TD=45'

TD=37'

TD=34'

TD=50'

TD=40'

TD=12.5'

TD=10'

TD

=10'

TD=20'

TD=10'

TD=9'

TD=40'

TD=10'

TD=27'

TD=10'

TD=3'

TD=41'

TD=40'

TD=27.5'

TD=27'

TD=27'

TD=21.5'

SLAG

SAND/GRAVEL

CLAY

LOWER PERMEABILITY SAND/GRAVEL (SILTY, CLAYEY, CEMENTED)

TD=50'

TD

=5'

SLA

G R

AM

P

UN

IO

N P

AC

IF

IC

R

R

PA

IS

AN

O D

RIV

E

CLAY

?

?

?

?

?

??

?

?

?

?

?

?

FILL

SHALE (BEDROCK)

AVG LOW WATER ELEV=3718.4

AVG HIGH WATER ELEV=3722.9

AM

ER

IC

AN

C

AN

AL

CA

NA

L W

ID

TH

=12'

(S

HO

WN

E

XA

GG

ER

AT

ED

D

UE

TO

A

CU

TE

A

NG

LE

O

F S

EC

TIO

N)

SILT

EX

-3

WELL/BORING ID

TD=85'TOTAL DEPTH OF BOREHOLE IN

FEET BELOW GROUND SURFACE

LEGEND

HIGH WL

RECENT WL

LOW WL

ARSENIC CONCENTRATION

IN SOILS (mg/kg)

ARSENIC CONCENTRATION

IN GROUNDWATER (mg/L)

NOTES:

K>26DEFINITION:

GROUNDWATER

ELEVATION (DATE)

0 200 400

HORIZONTAL SCALE IN FEET

0 20 40

VERTICAL SCALE IN FEET

C

(East)

AMSL = ABOVE MEAN SEA LEVEL

WL = WATER LEVEL

1. NORTHING AND EASTING COORDINATES ARE

TEXAS STATE PLANE, CENTRAL ZONE (NAD 83

DATUM) AND ARE IN U.S. SURVEY FEET.

2. ELEVATIONS ARE BASED ON NGS VERTICAL

CONTROL MONUMENT Q460. RECORD ELEVATION

IS 3738.19 (NAVD 88 DATUM).

3. MEASURING POINT FOR ALL WELLS IS TOP OF

CASING ON THE NORTH SIDE.

HYDRAULIC CONDUCTIVITY (K)

VALUES IN FEET/DAY

(6/11) (6/11)

(6/11)

(P

RO

JE

CT

ED

LO

CA

TIO

N)

(P

RO

JE

CT

ED

LO

CA

TIO

N)

(9/11)

(6/11)

(6/11)

(6/11)

(8/11)

(8/11)

(2/06)

TD=20'

?

?

?

?

?

?

?

?

?

? ?

?

?

?

?

?

?

?

?

?

EP

-122

?

SILT

SILT

SILT

SLAG

SLAG

SAND/GRAVEL

VERTICAL EXAGGERATION (VE)=10x

WELL SCREEN (BLUE INDICATES

SCREEN IN SEMI-ANNUAL

MONITORING NETWORK)

BASAL GRAVEL

(9/11)

K=26K=362K>24

K>24

K=116

CLAY

=<0.01 mg/L

TOTAL ARSENIC

CONCENTRATIONS

IN GROUNDWATER

EPA Arsenic Maximum

Contaminant Level

(MCL) =0.01 mg/L

=>0.01 mg/L

=>0.1 mg/L

=>1.0 mg/L

=>10 mg/L

(9/11)

(9/07)

(8/11)

(2/11)

SHALE BEDROCK (MESILLA VALLEY FORMATION)

WELL SCREEN (GRAY

INDICATES SCREEN IN

AN ABANDONED WELL)

(9/11)

(8/05)

(9/11)

(9/11)

CROSS-SECTION C-C'

EL PASO SMELTER SITE

EL PASO, TEXAS

G1-5

G

G

G

G

G

G

G

G

G

G

FIGURE

CROSS-SECTION N-N'

EL PASO SMELTER SITE

EL PASO, TEXAS

G1-16

EX-1

3745

3725

3750

3740

3735

3730

OBS-1

EP-85

EP-81

EP-78

EP-75

EP-73

EP-54EP-49

EP-114

0.1

1.00.0

1

10

1.00.1

1.0

1.0

0.1

1.0

0.01

10

0 160 320Feet

CIT

Y: H

ighl

ands

Ran

ch D

IV/G

RO

UP

: G

IS D

B: B

G

Proj

ect (

Proj

ect #

)

GRAPHIC SCALE

FORMER EL PASO SMELTER SITEEL PASO, TEXAS

PLAN OVERVIEW - PARKER BROTHERS ARROYO

FIGUREG2-1

LEGEND:

±Interim Site Monitoring Well

Approximate Parker Brothers ArroyoSaturated Thickness ExtentHistoric Arroyo Trace Lines

Historic Drainage Divide

Bedrock

Total Arsenic Contours (mg/L),August - September 2011Water Level Contour (feet amsl)

Property Boundary

FIELD DEMONSTRATION OF GROUNDWATER REMEDY IN PARKER BROTHERS ARROYO

PRB-1

Cross Section Lines

Permeable Reactive Barrier(PRB; size exaggerated)

AA'

B'

B

PRB-2

Path

:Z:\G

ISP

RO

JEC

TS\_

EN

V\A

SAR

CO

_ElP

aso\

GIS

\MX

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ield

Dem

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W_R

emed

y_P

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rBro

ther

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w.m

xd D

ate:

7/6

/201

6 Ti

me:

3:1

4:16

PM

Note:amsl - above mean sea level

mg/L = milligrams per liter

Arsenic Texas Risk Reduction Rule - Protective Concentration Limit (PCL) = 0.01 mg/L

Proposed Landfill Extent

Abandoned Monitoring Well

G

G