21

(2)

ARGO DAM

ARTESIAN WELL AREA

LITTLE

LAKE

FORMER

POND II

SECOND

SISTER

LAKE

THIRD

SISTER

LAKE

FIRST

SISTER

LAKE

I-9

4

Allen C

reek D

rain

RiverHuron

Rive

r

Hur

on

RED

GREEN

POND

POND

S

R

-

1

4

SR-14

T R I B U T A R Y

H O

N E

Y

C

R

E

E

K

I

-

9

4

CARETAKER'S

CABIN AREA

<1

<1

<1

<1

<1

(<1)

<1

14

79

(<1)

200

110

<1

1.3

240

<1

2600

340

280

54

(<1)

190

460

(470)

5.8

320

(1.7)

<1

1000

780

380

650

7.9

(3.3)

(320)

530

2

<1

680

16

<1

1.7

240

130

(100)

370

270

(250)

30

76

28

<1

8.3

<1

42

<1

390

<1

210

<1

23

13

<1

<1

<1

<1

<1

<1

<1

(<1)

11

(<1)

<1

<1

<1

<1

1.8

<1

<1

<1

Former Gelman Property Area

(560)

<1

DEEPER MIGRATION

(MERGES WITH

SHALLOWER D

PLUME TO EAST)

85

500

250

1

0

0

0

5

0

0

1

0

0

0

(470)

2

5

0

2

5

0

2

5

0

85

85

8

5

8

5

8

5

5

0

0

500

5

0

0

250

8

5

85

5

0

0

2

0

0

0

2

5

0

(190)

250

1

0

0

0

1

0

0

0

NOTES:

THE DATA SHOWN IS FROM SAMPLE PERIOD 04/2018 - 09/2018.

MAP COMBINES DATA FROM WELLS COMPLETED AT MULTIPLE

DEPTHS. INTERPRETATION OF THIS MAP REQUIRES FAMILIARITY

WITH THE GEOLOGY AND THE GROUNDWATER FLOW REGIME.

GE

LM

AN

S

CIE

NC

ES

Scio T

wp., W

ashtenaw

C

ounty, M

ichigan

PROJECT

806500

SHEET NO.

CAD FILE

EDIT

SCALE

DRAWING

PROJECT MGR. DATE

DRAWN BY DATE

GEOLOGIST DATE

DESIGN. BUILD. OPERATE.

1,4 D

IO

XA

NE

IS

OC

ON

CE

NT

RA

TIO

N M

AP

U

NIT

E

(A

PR

IL 2018 - S

EP

TE

MB

ER

2018)

- UNIT E 1,4-DIOXANE ISOCONCENTRATION CONTOUR (µg/L)

- UNIT D

2

1,4-DIOXANE ISOCONCENTRATION CONTOUR (µg/L)

- 1,4-DIOXANE CONCENTRATION (µg/L)

- DATA NOT USED

- PROHIBITION ZONE (PZ) BOUNDARY

- COMPLIANCE MONITOR WELL

- LITTLE LAKE AREA COMPLIANCE MONITOR WELL

ISO

LEGEND

- MONITOR WELL

- EXTRACTION WELL

- UNIT E EXTRACTION WELL OPERATING DURING SAMPLING

- FORMER RESIDENTIAL WELL ROUTINELY MONITORED

- INJECTION WELL

Hard copy is

intended to

be 24"x36"

when plotted.

© Copyright

2018 All Rights

Reserved.

NORTH

TW-18

TW-19

TW-23

TW-17

3076

(307)