This document provides details of William G. Olsen's professional experience as a geologist and hydrogeologist working for The Chazen Companies in New York State from 2002 to present. It describes his roles and responsibilities in field work and projects related to groundwater resources, environmental site assessments, and remediation investigations. Specific projects discussed include a groundwater resource investigation for a water district expansion, evaluating well performance through specific capacity analysis, and developing a backup groundwater source for a municipality.

1. William
G.
Olsen
Form
4A
–Attachment
A
Page
1
of
4
Attachment
A
Detailed
Description
of
Professional
Geologic
Work
Experience
I
have
assumed
the
following
roles
working
as
a
Geologist/Hydrogeologist
in
New
York
State
while
employed
by
The
Chazen
Companies,
Poughkeepsie,
New
York
(hereafter
‘Chazen’)
from
2002
to
2005,
and
again
from
2010
to
present
(9
years,
11
months,
total
work
experience).
During
this
time,
my
work
was
conducted
under
the
supervision
of
Russell
Urban-­‐Mead,
CPG,
Vice
President
of
Environmental
Services,
Chazen.
Field
Geologist
(May
2002
to
February
2005)
• Job
Responsibilities:
Served
as
a
junior-­‐level
Geologist
working
on
field
and
reporting
assignments
that
included
groundwater
resource
evaluations,
streamflow
studies,
geologic
site
characterizations,
Phase
II
Environmental
Site
Assessments
(ESAs),
New
York
State
Department
of
Environmental
Conservation
(NYSDEC)
remedial
investigations,
underground
storage
tank
closures,
landfill
closure
investigations,
bedrock
fracture-­‐trace
analyses,
and
post-­‐closure/remedial
environmental
monitoring;
installation,
maintenance,
and
downloading
of
long-­‐term
ground
and
surface
water
monitoring
equipment;
analysis,
presentation,
and
interpretation
of
empirical
or
researched
geologic
data;
contributing
author
on
various
environmental
and
hydrogeological
reports.
Scientist
(Hydrogeologist)
(May
2010
to
Present):
• Job
Responsibilities:
Continuation
of
field
Geologist
details
described
above,
with
additional
responsibilities
including
management
or
co-­‐management
of
geologic/environmental
projects
and
mentoring/training
of
junior
staff;
now
serve
as
primary
author
or
data
analyst
on
environmental/hydrogeological
reports
and
as
field
operations
leader
on
more
complicated
and
larger
scale
environmental
investigation
and
groundwater
supply
projects.
Summary
of
Project
Experience
(referenced
on
page
two
of
Form
4A):
1. Water
District
Expansion
–
Groundwater
Resource
Investigation,
Town
of
Wawarsing,
New
York
(October
2016
to
Present):
I
currently
serve
as
co-­‐manger
and
lead
field
operations
leader/geologist
on
this
project
which
seeks
to
establish
high-­‐yielding,
sustainable
drinking
water
wells
to
support
a
150
gallons
per
minute
(GPM)
water
district
expansion
in
the
Town.
Exploration
of
two
properties
in
the
Rondout
Valley
have
been
completed
to
date,
including
an
extensive
parcel
of

2. William
G.
Olsen
Form
4A
–Attachment
A
Page
2
of
4
agricultural
land
owned
by
New
York
State
just
south
of
the
NYS
Eastern
States
Correctional
Facility.
High-­‐resolution
geologic
profiling
of
glacial
sediments
up
to
240
feet
thick
using
sonic
coring
methods
was
conducted,
allowing
the
preparation
of
detailed
geologic
logs
and
construction
of
stratigraphic
cross-­‐sections
for
hydrogeological
analysis.
Promising
saturated
sand
and
gravel
horizons
have
been
identified,
with
preliminary
150
GPM
test
well
screen
designs
completed
based
on
sieve
analyses
and
grain-­‐size
distribution
curves.
Next
project
steps
include
an
additional
boring
investigation
to
refine
lateral
and
vertical
extent
of
initially
identified
sediments,
followed
by
installation
and
test
pumping
of
gravel
wells
to
develop
a
reliable
groundwater
well
supply
for
the
Town.
2. Specific
Capacity
Analysis
-­‐
Well
Performance
Evaluations,
Town
of
Bethlehem,
New
York
(Spring
2013
to
Present):
I
currently
serve
as
co-­‐manager
and
lead
analyst
on
this
project,
which
provides
hydrogeological
support
services
to
the
Town.
The
Town
wellfield
consists
of
eight
screened-­‐wells
along
the
Hudson
River,
all
of
which
show
dynamic
water
table
variation
from
tidal
cycles
in
the
river.
To
re-­‐establish
well
yields,
the
Town
regularly
re-­‐develops
the
well
screens
using
mechanical
surge
and
pump
methods,
or
by
carbon-­‐dioxide
injection.
To
evaluate
the
effectiveness
of
each
treatment
and
track
long-­‐term
well
yield
trends,
the
performance
of
each
well
is
tested
prior
to
and
after
each
redevelopment
event
using
specific
capacity
analysis.
Pumping
tests
at
stepped
rates
are
conducted,
measuring
drawdown
that
is
under
tidal
influence.
To
obtain
true
drawdown
values
to
calculate
specific
capacity
(GPM/ft
drawdown),
a
graphical
analysis
using
USGS
Hudson
River
stage
data
is
conducted
to
correct
for
tidal
influence.
The
results
of
the
well
performance
evaluations
are
used
to
refine
redevelopment
frequency
and
estimate
well
field
longevity.
3. Groundwater
Resource
Development
–
Backup
to
NYCDEP
Catskill
Aqueduct
Connection,
Village
of
New
Paltz,
New
York
(Fall
2013
to
Summer
2014,
Spring
2016):
I
assumed
many
roles
on
this
extensive
groundwater
resource
development
project,
including
project
management
assistant,
hydrogeology
field
operations
and
design
leader,
data
analyst,
and
reporting
co-­‐author.
Ten
months
of
continuous
field
investigation
and
analysis
led
to
the
design
and
successful
installation
of
a
400
GPM
backup
municipal
groundwater
source
to
be
used
during
10-­‐week
Catskill
Aqueduct
shutdown
periods.
The
screened
well
was
installed
in
a
high-­‐yielding
confined
sand
and
gravel
horizon
immediately
overlying
bedrock
and
covered
by
thick
(>100
feet)
clay
and
silt
confining
units.
To
identify
the
candidate
well
location,
one-­‐hundred
and
five
(105)
exploratory
borings
to
characterize
Wallkill
River
Valley
sediments
were
installed
using
sonic,
rotary,
and
direct
push
drilling
methods.
Exploratory
drilling
locations
were
based
on
evaluation
of
bedrock
surface
profiles
along
gravity
survey
transects,
real-­‐time
field
findings,
and
review
of
historical
records.
Fracture-­‐
trace
analyses
were
also
conducted
to
potentially
identify
candidate
bedrock
well
locations.
Following
the
installation
of
test
wells,
qualifying
aquifer
pumping
tests

3. William
G.
Olsen
Form
4A
–Attachment
A
Page
3
of
4
were
conducted
that
included
extensive
analysis
of
off-­‐site
drawdown
and
groundwater
quality
impacts
to
nearby
domestic
wells.
Additional
evaluations
of
privately
owned
high-­‐yielding
bedrock
wells
were
conducted
for
consideration
as
an
alternate
backup
supply.
Extensive
pumping
tests
with
water
quality
analyses
confirmed
high
salt
contamination
levels
in
the
aquifer
from
nearby
New
York
State
Thruway
Interstate
87
in
the
vicinity
of
the
northbound
off-­‐ramp
of
Exit
18,
a
condition
that
was
cost
prohibitive
relative
to
treatment.
4. Lower
South
Street
NYSDEC
Brownsfield
Cleanup
Program
(BCP)
Site,
City
of
Peekskill,
New
York
(Summer
2016
to
Present):
This
project
serves
to
evaluate/remediate
a
multiple-­‐parcel
vacant
commercial
property
under
the
NYSDEC
BCP
program
to
support
future
redevelopment
of
the
Site.
Under
this
project
I
serve
as
field
operations
leader,
while
also
providing
critical
project
management
support,
data
and
alternatives
analysis,
and
co-­‐authoring
of
reports
required
under
the
BCP
program.
A
remedial
investigation
was
conducted
last
summer
to
supplement
data
gaps
in
the
historic
site
record
and
included
environmental
soil
borings,
collection
and
analysis
of
soil
and
groundwater
samples,
and
field-­‐delineation
of
lead-­‐impacted
soil
using
an
XRF
(X-­‐Ray
Fluorescence)
analyzer.
A
remedial
investigation
report
had
been
submitted
to
NYSDEC
for
review,
and
remedial
alternatives
are
currently
being
evaluated
for
the
Site.
5. Commercial
Plaza
Investigation/Remediation,
private
client,
Brooklyn,
New
York
(Fall
2011
to
Summer
2016):
The
project
served
to
investigate
and
remediate
a
historic
underground
tank
petroleum
spill
at
a
commercial
property
underlain
by
uniform
sand
deposits.
I
served
as
field
operations
leader,
co-­‐designer
of
an
in-­‐situ
chemical-­‐oxidation
(ISCO)
remedial
program
using
injection
wells,
data
analyst,
and
reporting
co-­‐author.
A
boring
investigation
was
completed
during
the
Fall
of
2011,
which
delineated
a
plume
of
petroleum-­‐impacted
groundwater.
ISCO
was
selected
as
the
site
remedy
based
on
analysis
of
site
geology/hydrogeology
and
the
analytical
environmental
data.
Injections
of
catalyzed
hydrogen
peroxide
were
administered
to
remediate
groundwater
impacts,
and
periodic
groundwater
monitoring
was
conducted
to
confirm
signification
reduction
of
dissolved
volatile
organic
compounds
(VOCs).
This
site
has
recently
entered
the
NYSDEC
BCP
program,
and
I
will
continue
to
assist
in
future
remediation
and
monitoring
obligations
at
the
site
seeking
to
fully
remediate
past
contaminant
releases.
6. Gasoline
Station
Spill
Closures,
Private
Client,
Hudson
Valley,
New
York
(Summer
2011
to
Fall
2014):
In
September
2011,
I
commenced
management
of
five
ongoing
gas
station
investigations/remedies
with
open
NYSDEC
spill
numbers.
Limited
excavation
of
gasoline-­‐impacted
soil
had
occurred
during
prior
underground
storage
tank
upgrades,
leaving
behind
residual
contamination.
Focused
soil
boring
investigations
were
conducted
to
delineate
the
remaining
impacts,
and
gather
geologic
information
to
support
design
of
remedial
injection
well
networks.
Sites

4. William
G.
Olsen
Form
4A
–Attachment
A
Page
4
of
4
were
treated
using
a
combination
of
ISCO
and
enhanced
aerobic
bioremediation
compounds.
Periodic
site
monitoring
confirmed
remedial
progress,
and
submission
of
regular
reports
to
NYSDEC
ultimately
led
to
closure
of
all
five
corresponding
NYSDEC
spills.
7. Residential
Property,
Private
Client,
Staatsburgh,
New
York
(Fall
2011
to
Fall
2016):
In
December
2011,
I
commenced
management
of
an
underground
petroleum
spill
remedy
with
an
open
NYSDEC
spill
number.
Gasoline-­‐impacted
soil
adjacent
to
a
site
structure
foundation
could
not
be
removed
during
prior
underground
storage
tank
upgrades.
Remedial
wells
were
designed
and
installed
to
target
this
remaining
contamination
with
ISCO
and
enhanced
aerobic
bioremediation
compounds.
Periodic
remedial
progress
reports
were
submitted
to
NYSDEC,
ultimately
leading
to
closure
of
the
spill
with
a
no
further
action
determination.
8. Stream
Monitoring
Program,
Private
Client,
Pine
Plains,
New
York
(Spring
2010
to
Fall
2011):
This
program
involved
establishing
baseline
flow
data
for
two
streams
on
a
several
hundred-­‐acre
property
planned
for
residential
development.
I
served
as
lead
task
manager
and
field
operations
manager.
Stream
stage
monitoring
stations
were
located
and
equipped
with
water
level
data-­‐logging
equipment.
Stream
data
were
periodically
downloaded
and
flows
gauged
manually
allowing
me
to
develop
rating
curves
for
each
stream
for
use
in
estimating
stream
discharge
from
stage
measurements.
9. Fracture
Trace
Analyses,
Various
Groundwater
Resource
Projects
(Fall
2002
to
Present):
Since
2002,
I
have
performed
fracture
trace
analyses
to
support
selection
of
candidate
bedrock
well
locations
on
eight
water
supply
projects
across
New
York
State.
Fracture
trace
analyses
involve
cross-­‐examining
stereo-­‐pair
aerial
photos
and
geologic
mapping
to
identify
bedrock
fracture
zones
with
potentially
high
groundwater
yields,
based
on
linear
surface
expressions
in
the
landscape.
This
job
function
was
created
after
completion
of
the
higher
learning
intensive
“Fracture
Trace
and
Lineament
Analysis”
workshop
I
attended
in
November
2002,
given
by
National
Ground
Water
Association
at
Penn
State
University,
State
College,
Pennsylvania.
I
currently
serve
as
the
sole
Geologist
performing
fracture
trace
analyses
at
Chazen.
10. Other
Relevant
Projects
(Spring
2002
to
Present):
Since
2002,
within
my
capacity
as
a
Geologist
I
have
supported
various
other
company
projects
as
the
technical
lead
since
2010,
or
as
assistance
geologist
since
2002,
many
of
them
shorter
in
duration
than
the
examples
listed
above.
These
projects
include
Phase
II
ESAs,
NYSDEC
BCP
investigations,
hydrogeological
evaluations,
groundwater
well
pumping
tests,
groundwater
and
surface
water
quality
evaluation,
consulting
support
for
environmental
remediation
and
water
resource
projects,
underground
storage
tank
closures,
and
geotechnical
field
investigations.