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6595
FIGURE 4 - 1
SAMPLE LOCATIONS
DES MOINES SOUTH AREA SOURCE CONTROL PROJECT
DES MOINES. IOWA
ECKENFELDER INC.
Nashville.Tennessee Mahwoh.New Jersey Rochester.New York
1 6595
FIGURE 4 - 2
LOCATION OF GEOPHYSICAL SYRVEY TRAVERSES
DES MOINES SOUTH AREA SOURCE CONTROL PROJECT
OES MOINES. IOWA
ECKENFELDER INC.
Nashville.Tennessee Mahwoh.New Jersey Rochester.New York
6595
.S-7
S-6
- * -
S-i • S - 4 •S -S
MAINTENANCE GARAGE
10
scale
10 20
APPROX. feet
SAMPLE DEPTHS(FEET) S-1 s-2 S-3 S-4 S-5 S-6 S-7
4.3-4.8 1.5 - 2.0 1.5 - 2.0 2.0- 2.5 2.0- 2.5 2.0- 2.5 2.0- 2.5
LEGEND; A S - I SHALLOW AUGER BORING • LOCATION
FIGURE 4-3 LOCATIONS OF SHALLOW
BORINGS IN VICINITY OF THE FORMER
ALDRIN MIXING TANK DES MOINES SOUTH AREA
SOURCE CONTROL PROJECT
ECKENFELDER INC.
N:i.sl«vilk','l«-um*!«iv Maliwali,Ni-wJiTK7
6595
"T^^^e^^m
LOCKABLE MOTECTIVE CASING
SANO PACK-
f y
OONCKETE
r ^ 2 ^
EXISTING fflOUNO BURmCE
7»^5»?55?^Sf^fr
• 'M IN IMUM KMEHOLE OIA.
2" PVC PIPE
NEAT C E M E N T / K N T O N I T E M O U T
2 ' BENTONITE PELLET SEAL
—MINIMUM t '
-2 PVC,0.020" SLOTTED WELL SCREEN NOMINAL LENGTH: 10 FEET
SHALE BEDROCK SURACE
FIGURE 4 - 4
TYPICAL BEDROCK MONITORING WELL CONSTRUCTION DETAIL
DES MOINES SOUTH AREA SOURCE CONTROL PROJECT
E C K E N F E L D E R Na.hviIIc.Tenne«ce J J S ^ Mjhwih.NcwJerwy
6595
O H A - 3 O H A - 2 O H A - I
HA-5O X DB-12 O H A - 4
O H A - 6
/ . / / / / / /
LEGENDt OB-12
H A - 2 ,
DEEP AUGER BORING
SHALLOW AUGER BORING
10
scale
10 20
APPROX. feet
FIGURE 4-5
LOCATIONS OF SURFICIAL SOIL SAMPLES COLLECTED FOR
ANALYSIS OF CHROMIUM
DES MOINES SOUTH AREA SOURCE CONTROL PROJECT
ECKENFELDER ING
Nashville.Tennessee Mahwah, New Jersey