GERAGHTY
'& MILLER, INC.
nvironmental Services
Ground Water 
Engineering 
Hydrocarbon 
Remediation 
Education
August 14, 1992
Ms. Caroline Kwan
U.S. Environmental Protection Agency
26 Federal Plaza, Room 737
New York, New York 10278
Re: 
Proposed Soil Borings B-14 through B-16 Tutu Service Station Investigation
St. Thomas, U.S. Virgin Islands.
Dear Ms. Kwan:
At the request of Ms. Ana Gloria Ramos, Designated Coordinator for the Tutu
Environmental Investigation Committee (TEIC), Geraghty & Miller, Inc. would like to perform
three additional soil borings (designated B-14, B-15, and B-16) at the Curriculum Center
Building (former LAG A Building). Based upon information developed by TEIC, a metal pipe
which extends through the north wall of the building (see Figure 1) may have been a source of
tetrachloroethene (PCE) discharge.
The three soil borings will be advanced using hollow-stem augers until refusal.
Continuous split-spoon samples will be taken at each boring. Each split-spoon will be screened
using a HNu photoionization instrument. The sample with the highest HNu reading or visible
staining will be selected for laboratory analysis. If no elevated HNu readings are encountered,
the soil interval 0 to 6 inches above the bedrock surface or water table (whichever is encountered
first) will be selected for laboratory analysis. Each split-spoon soil sample will be sampled for
field gas chromatograph analysis.
The sampling methodology outlined above and all other associated procedures will be
performed in accordance with the project work plan. Because the foundation outlined in Figure
TUT 
006 
1778
201 West Passaic Street, 3rd Floor • Rochelle Park, New Jersey 07662-(201) 909-0700* FAX (201) 909-0567/0568
*64887*
64887
GERAGHTY & MILLER, INC.
2 is under construction, it is important that these borings be completed while the area is still
accessible. Based upon our recent telephone conversation, it is our understanding that you do
not have any objections to these additional borings.
Please call if you have any questions.
Sincerely,
GERAGHTY & MILLER. INC.
K
Thomas V. Danahy
Senior Scientist/Project Manager
Daniel A. Nachman
Vice President/Project Director
c: 
Ana Gloria Ramos, TEIC
Sarah K. Odland, CDM Federal Programs
TVD:jmh
PR013.01-3/081492.hr
TUT 
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1779
1
z
_i
z
a
VI HA II
PROPOSED BORINGS
B-14, B-15, B-16
FOUNDATION
TRENCH
B-1
UJ
5
a:a
I
VIRGIN
ISLAND
HOUSING
AUTHORITY
OFFICE
CURRICULUM CENTER
BUILDING
(FORMER LAGA BUILDING)
SCALE
(APPROXIMATE)
©MW-14
100 FEET
1
GERAGHTY
& MILLER, INC.
Environmental Services
GENERAL LOCATION OF
PROPOSED SOIL BORINGS B-14 THROUGH B-16
TUTU SERVICE STATION INVESTIGATION
ST. THOMAS, U.S. VIRGIN ISLANDS
FIGURE
1
TUT 
006 
1780
g
Q.
Q.
CD
ac.
S
UJ5
oi
I
o
B-16
-PIPE OUTLET THROUGH
EXISTING WALL
(SUSPECTED DISCHARGE POINT)
CURRICULUM CENTER
BUILDING
(FORMER LAGA BUILDING)
SCALE Oi
10 FEET
1
GERAGHTY
4IIT & MILLER, INC.
Environmental Services
DETAIL OF PROPOSED
SOIL BORING LOCATIONS B-H, B-15, AND B-16
TUTU SERVICE STATION INVESTIGATION
ST. THOMAS, U.S. VIRGIN ISLANDS
FIGURE
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1781