NCD062555792_20000331_Sigmons Septic Tank Service_FRBCERCLA PSD_Aerial Photographic Analysis-OCR

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AERIAL PHOTOGRAPHIC ANALYSIS OF
SIGMON'S SEPTIC TANK SITE
Statesville, North Carolina
by
Kenneth W. Giles and Donley E. Kisner
Environmental Research, Inc.
5267 John Marshall Hwy., Suite C
Linden, Virginia 22642
for
Environmental Services
Lockheed Martin Services
Las Vegas, Nevada 89119
Contract No. 68-D-00-267
Work Assignment Manager
Joan L. Bozik
Landscape Ecology Branch
Environmental Sciences Division
Las Vegas, Nevada 89193-3478
ENVIRONMENTAL SCIENCES DIVISION
NATIONAL EXPOSURE RESEARCH LABORATORY
OFFICE OF RESEARCH AND DEVELOPMENT
U.S. ENVIRONMENTAL PROTECTION AGENCY
LAS VEGAS, NEVADA 89193-3478
TS-PIC-20204510S
SEPTEMBER 2002
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NOTICE
This document has undergone a technical and quality control/assurance
review and has been approved for publication by personnel of the
U.S. Environmental Protection Agency, Office of Research and Development,
Environmental Sciences Division, Landscape Ecology Branch at Las Vegas,
Nevada. It is for internal Agency use and distribution only.
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ABSTRACT
An aerial photographic analysis of the Sigmon's Septic Tank site,
located in Iredell County, North Carolina, approximately 8.1 kilometers
(5.0 miles) southwest of the city of Statesville, was conducted to provide
operational remote sensing support to field investigations of the U.S.
Environmental Protection Agency (EPA) Region 4 under the Comprehensive
Environmental Response, Compensation, and Liability Act (CERCLA). The
analysis was conducted to document landscape morphology, patterns of waste
disposal, and other observable activities and conditions of environmental
significance at this Superfund site.
The Sigmon's Septic Tank site is approximately 6.2 hectares (15.4 acres)
in area. From 1978 to 1992, Sigmon's Septic Tank Service pumped heavy
sludge and septic tank wastes from residential, commercial, and industrial
customers; installed and repaired septic tanks; and provided a variety of
waste removal services (EPA, 2002). The focus of this analysis was to
document the location and number of on-site impoundments and to determine
which lagoons were excavated and backfilled in 1995.
Six dates of aerial photographs, covering the period from 1976 through
1998, were acquired, analyzed, and reproduced for inclusion in this report.
A search was made to locate aerial photographs from the years 1969 to
1975, but none could be found. Significant on-site features identified in
the photographic analysis include impoundments, refuse and probable refuse,
light-and medium-toned mounded material, a trench, an excavation, a pit,
disturbed ground, a fill area, and ground scars.
The U.S. Environmental Protection Agency (EPA), Environmental Sciences
Division, Landscape Ecology Branch in Las Vegas, Nevada, prepared this report
tor the EPA Region 4 Superfund Division in Atlanta, Georgia, and the EPA Office
of Emergency and Remedial Response in Washington, D.C.
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CONTENTS
Abstract ............................................................... .
Introduction ........................................................... .
Methodology ............................................................ .
Photographic Analysis .................................................. .
Number
April 27, 1976 ................................................... .
May 12, 1982 ..................................................... .
March 23, 1986 ................................................... .
January 30, 1993 ................................................. .
April 25,
March 14,
1996
1998
FIGURES
1 Study area location map,
Iredell County, North Carolina, 1972 ............................ .
2 Local study area location map,
Troutman, North Carolina, 1993
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8
Sigmon's
Sigmon's
Sigmon's
Sigmon's
Sigmon's
Sigmon's
r:7 nc:c:;:::iru -------.1
Septic Tank
Septic Tank
Septic Tank
Septic Tank
Septic Tank
Septic Tank
site,
site,
site,
site,
site,
site,
April 27, 1976 ....................... .
May 12, 198 2 ......................... .
March 23, 1986 ....................... .
January 30, 1993 ..................... .
April 25,
March 14,
1996
1998
References ............................................................. .
Legend ................................................................. .
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INTRODUCTION
An aerial photographic analysis was conducted of the Sigmon's Septic
Tank site (CERCLIS ID NCD062555792) located in Iredell County, North
Carolina, approximately 8.1 kilometers (5.0 miles) southwest of Statesville,
North Carolina. This analysis provides operational remote sensing support to
field investigations of the U.S. Environmental Protection Agency (EPA) Region
4 under the Comprehensive Environmental Response, Compensation, and Liability
Act (CERCLA). This report has been prepared to document landscape morphology,
patterns of waste disposal, and other observable activities and conditions of
environmental significance at the site, with a focus on determining the number
and locations of on-site impoundments.
Figure 1 illustrates the approximate location of the Sigmon's Septic
Tank site within the State of North Carolina, and Figure 2 depicts the local
study area of the Sigmon's Septic Tank site on an overlay to a color-copy
of a U.S. Geological Survey topographic map (USGS, 1993). The site, which
encompasses approximately 6.2 hectares (15.4 acres), is situated on hilly
terrain near the delta of the Catawba River.
Sigmon's Septic Tank Service pumped heavy sludge and septic tank
wastes from residential, commercial, and industrial customers; installed and
repaired septic tanks; and provided a variety of waste removal services. The
waste disposal reportedly took place on site from 1978 to 1992 in eight to
ten unlined lagoons. The wastes were described as septage, grease, and a
milky white liquid. In 1995, seven to eight of these lagoons were excavated
to a depth of ten feet. The excavated sludge was mixed with sawdust and
piled adjacent to the l2goons, and the lagoons were, in turn, filled with soil
excavated from the northern portion of the site (EPA, 2002).
Six dates of black-and-white and color infrared aerial photographs,
covering the period from 1976 through 1998, were acquired, analyzed, and
reproduced for inclusion in this report. A search was made to locate
aerial photographs from the years 1969 to 1975, but none could be found.
Significant on-site features identified in the photographic analysis include
impoundments, refuse and probable refuse, a trench, light-and medium-toned
mounded material, an excavation, a pit, and ground scars.
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FIGURE 1
SIGMON'S SEPTIC TANK
STUDY AREA LOCATION MAP
IREDELL COUNTY, NORTH CAROLINA
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N
A
STATE OF NORTH CAROLINA
(USGS, 1972)
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APPROX. SCALE 1 :2,800,000
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FIGURE 2
SIGMON'S SEPTIC TANK
LOCAL STUDY AREA LOCATION MAP
TROUTMAN, NORTH CAROLINA
USGS QUADRANGLE, 1993
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APPROX. SCALE 1 :24,000
An impoundment in the northern portion of the site was first seen in 1976
and remained throughout the study period. A grouping of ten impoundments
in the southern portion of the site was noted in 1982. A trench had been
dug north of these impoundments by 1986. In 1993, two new impoundments were
seen in this grouping and two of the original ten impoundments (the smaller,
southernmost ones) had been backfilled. By 1996 the remaining ten impoundments
in the southern portion of the site had been filled, and a vegetated fill area
and mounded material was seen within and in proximity to the location of these
former impoundments. In 1998, medium-toned mounded material was seen in the
central portion of the site and in the northern portion of the fill area in
the southern portion of the site.
A Glossary, defining features or conditions identified in this report,
follows the Photographic Analysis section. Sources for all maps, aerial-
photographs, and collateral data used in the production of this report are-
listed in the References section. A list of all aerial photographs that
were identified and evaluated for potential application to this study can be
obtained by contacting the EPA Work Assignment Manager. Historical aerial
photographs used in the analysis of this site have been digitally scanned and
plotted for use in this report. A transparent overlay with interpretive data
is affixed to each of the digital plots. See the Methodology section for a
discussion of the scanning and printing procedures.
The EPA Environmental Sciences Division, Landscape Ecology Branch in
Las Vegas, Nevada, prepared this report for the EPA Region 4 Superfund
Division in Atlanta, Georgia, and the EPA Office of Emergency and Remedial
Response in Washington, D.C.
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METHODOLOGY
This report was prepared using a standard methodology that includes
the following steps:
data identification and acquisition,
photographic analysis and interpretation, and
• graphics and text preparation.
These steps are described below. Subsections also address details
related to specific kinds of analyses that may be required to identify envi-
ronmental features such as surface drainage and wetlands. All operational
steps and processes used to perform this work (including data identification
and acquisition, photographic analysis and interpretation, and graphics and
text preparation) adhere to strict QA/QC guidelines and standard operating
procedures (SOPs) These guidelines and procedures are documented in the
Master Quality Assurance Project Plan (QAPP) prepared for Remote Sensing
Technical Support Contract No. 68-D-00-267 (LMS, 2002).
Data identification and acquisition included a search of government and
commercial sources of historical aerial film for the study area. Photographs
with optimal spatial and temporal resolution and image quality were identified
for acquisition. In addition, U.S. Geological Survey (USGS) topographic maps
were obtained to show the study area location and to provide geographic
and topographic context.
To conduct this analysis, the analyst obtained diapositives (transparen-
cies) of historical aerial photographs showing the study area. Diapositives
are most often used for analysis instead of prints because the diapositives
have superior photographic resolution. They show minute details of
significant environmental features that may not be discernible on a paper
print.
A photographic analyst uses a stereoscope to view adjacent, overlapping
pairs of diapositives on a backlit light table. In most cases, the
stereoscope is capable of various magnifications up to 60 power. Stereoscopic
viewing involves using the principle of parallax (observing a feature from
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slightly different positions) to observe a three-dimensional representation
of the area of interest. The stereoscope enhances the photo interpretation
process by allowing the analyst to observe vertical as well as horizontal
spatial relationships of natural and cultural features.
The process of photographic analysis invoTv·es ·1:.he visual examination and
comparison of many components of the photographic image. These components
include shadow, tone, color, texture, shape, size, pattern, and landscape
context of individual elements of a photograph. The photo analyst identifies
objects, features, and "signaturesn associated with specific environmental
conditions or events. The term "signaturen refers to a combination of
components or characteristics that indicate a specific object, condition, or
pattern of environmental significance. The academic and professional train-
ing, photo interpretation experience gained through repetitive observations
of similar features or activities, and deductive logic of the analyst as
well as background information from collateral sources (e.g., site maps,
geologic reports, and soil surveys) are critical factors employed in the
photographic analysis.
The analyst records the results of the analysis by using a standard set
of annotations and terminology to identify objects and features observed on
the diapositives. Significant findings are annotated on overlays attached to
the photographic or computer-reproduced prints in the report and discussed
in the accompanying text. Annotations that are self-explanatory may not be
discussed in the text. The annotations are defined in the Fold-out Legend at
the end of the report and in the text when first used.
Objects and features are identified in the graphics and text according
to the analyst's degree of confidence in the evidence. A distinction is made
between certain, probable, and possible identifications. When the analyst
believes the identification is unmistakable (certain), no qualifier is used.
Probable is used when a limited number of discernible characteristics allow
the analyst to be reasonably sure of a particular identification. Possible
is used when only a few characteristics are discernible, and the analyst can
only infer an identification.
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The prints in this report have been reproduced, either by photographic
or computer methods, from the original film. Reproductions are made from the
original film and may be either contact (the same size) prints or enlargements,
depending on the scale of the original film. Any computer-produced prints
used in this report are generated from scans of the film at approximately
1,300 dots per inch (dpi) and printed at 600 dpi. Although the reproductions
allow effective display of the interpretive annotations, they may have less
photographic resolution than the original film. Therefore, some of the objects
and features identified in the original image and described in the text may not
be as clearly discernible on the prints in this report.
Study area boundaries shown in this report were determined from aerial
photographs or collateral data and do not necessarily denote legal property
lines or ownership.
Color Infrared Photography
Color infrared film has been reproduced for the 1998 photograph (Figure
8). Normal color film records reflected energy in the blue, green, and red
portions of the electromagnetic spectrum. Color infrared film differs in
that it is sensitive not only to reflected blue, green, and red energy,
but also to reflected energy in the infrared portions of the electromagnetic
spectrum; however, the blue energy is filtered out and ·only the green, red,
and infrared energy is recorded.
When color infrared film is processed, it displays "false" colors that
do not correspond with the true colors of the features photographed. For
example, features that are highly reflective in the infrared portion of
the spectrum, such as healthy green vegetation, appear red to magenta on
color infrared film. The false color displayed by a feature is produced
in accc~dance witl·1 the proportions of infrared, green, and red energy it
reflects. These proportions are referred to as the feature's "spectral
reflectance characteristics". To accurately interpret the true color of
a particular feature from color infrared film, knowledge of the spectral
reflectance characteristics of that feature is required. This information is
not readily available for the majority of features identified in this report.
Therefore, unless otherwise indicated, no attempt is made to interpret the
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true colors of the features identified on the color infrared film analyzed
for this report.
Surface Drainage
The surface drainage analysis produced for this report identifies the
direction and potential path that a liquid spill or surface runoff would
follow based on the topography of the terrain and the presence of discernible
obstacles to surface flow. The analyst determines the direction of surface
drainage by stereoscopic analysis of the aerial photographs and by examining
USGS topographic maps. Site-specific surface drainage patterns are annotated
on the map or photo overlay. Where the direction of subtle drainage cannot be
determined, an indeterminate drainage line symbol is used.
flow is ascertained from the USGS topographic maps.
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Regional surface
PHOTOGRAPHIC ANALYSIS
The Sigmon's Septic Tank site traverses a ridge approximately 290 meters
(950 feet) above sea level in hilly terrain. Drainage from the site
flows westward, into an unnamed creek that connects to the Catawba River,
approximately 2.4 kilometers (1.5 miles) to the southwest.
The site, which is approximately 8.1 kilometers (5.0 miles) southwest
of Statesville, North Carolina, fronts State Route 1333. Residential land
surrounds the site on all sides except the western, which is in commercial
land use.
Throughout this report, all environmentally significant features are
annotated on the print enlargements. In cases when features are not annotated
in the subsequent year(s) of analysis, they are either no longer visible or
are deemed to be inactive. Buildings are annotated but are not discussed
unless they are associated with an environmentally significant feature.
Due to the prevalence of a dense tree canopy within and surrounding the
study area, fencelines and drainage channels are often obscured; however,
they have been delineated whenever they are discernible.
April 27, 1976 (FIGURE 3)
A few trees are visible in the northern portion of the site; the
central and southern portions of the site are almost completely cleared
of vegetation.
A residence comprised of two buildings (B) is visible in the northern
portion.of the site. Fencing is noted between the two buildings and along
State Route 1333 to the north. A liquid-filled (not annotated) impoundment
(IM) is visible between two hills (not annotated) to the south. A berm has
been constructed on the western side of the impoundment to impound the liquid
(not annotated). A drainage channel leads westward from the impoundment,
off the site and downhill. An excavation (EX) surrounded by light-(LT)
and dark-toned (DK) material (M) is seen to the east. Three trailers (TL}
are observed to the south, adjacent to an access road that leads to the
southern portion of the site.
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I FIGURE 3
I SIGMON'S SEPTIC TANK APRIL 27, 1976 APPROX. SCALE 1 :2, 700
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May 12, 1982 (FIGURE 4)
The impoundment containing liquid (not annotated) and the west-trending
drainage way in the northern portion of the Sigmond's Septic Tank site remain
visible·. Medium-toned (MT) mounded material (MM) is visible to the south of
the impoundment and light-toned material is noted to the east. A trailer
is seen in the central portion of the site. Farther south, probable (PROB)
refuse (RF) is -observed near the access road from State Route 1333 that
parallels the eastern site boundary. A probable excavation surrounded by
light-toned mounded material is also visible in this vicinity.
Ten impoundments are located in the southern portion of the site. These
impoundments have been labeled IM 1 through IM 10, for reference. In this and
the two subsequent years (1986 and 1993) of analysis, the impoundments contain
a mixture of liquid and/or material that may correspond to the septage,
grease, and milky white· liquid described in the collateral data (EPA, 2002).
The contents of the impoundments (while not annotated) are as follows:
IM 1 Medium-toned liquid and/or material.
IM 2 Light-toned liquid and/or material.
IM 3 Dark-toned liquid and/or material.
IM 4 Medium-and dark-toned liquid and/or material.
IM 5 Medium-toned liquid and/or material.
IM 6 Medium-and dark-toned liquid and/or material.
IM 7 Medium-toned liquid and/or material.
IM 8 A small amount of probable medium-toned liquid and/or matrial.
IM 9 D3rk-toned liquid and/or material.
IM 10 Medium-toned liquid and/or material.
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I FIGURE 4
I SIGMON'S SEPTIC TANK
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M4 ~ ~-• ' ,
.;.-··.
' . ~~ ~ ~q,:.,1,·~ ·• ' · IM,9
'< ... ,.
MAY 12, 1982
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APPROX. SCALE 1 :2, 700
March 23, 1986 (FIGURE 5)
A new building (NB) and new fencelines are noted in the northern portion
of the Sigmon's Septic Tank site. The impoundment situated to the south has
increased in extent since 1982 and contains liquid. An excavation is noted
south of the impoundment, and a new building is visible along the access road
to the east. A drainage pathway extends from this new building west into
the impoundment. A fence surrounds another new building seen south of the
impoundment. A ground scar (GS) is visible within this fenced area. To
the southeast light-toned mounded material, refuse, an empty pit, and a
probable pit are seen near the access road leading to the southern portion
of the site. A new building and a trailer are also seen to the south
along this access road.
A trench (TR) is visible north of the grouping of impoundments in the
southern portion of the site. A drainage pathway is seen entering this trench
from IM 1. A new drainage pathway leads to IM 10 from near IM 6. Another
new drainage channel is seen leading from between IM 4 and IM 5, and joins
with a drainage channel leading from IM 8. The contents of each of these
impoundments, all ten of which noted in 1982 remain, are as follows:
IM 1
IM 2
IM 3
IM 4
IM 5
IM 6
IM 7
IM 8
IM 9
IM 10
Medium-toned liquid and/or material, with a small amount of dark-
toned liquid and/or material. This impoundment is interconnected
(not annotated) with IM 2.
Medium-and dark-toned liquid and/or material. This impoundment
is interconnected (not annotated) with IM 1.
Light-toned liquid and/or material.
Light-and dark-toned liquid and/or material.
Dark-toned liquid and/or material.
Light-and medium-toned liquid and/or material.
Light-and medium-toned liquid and/or material.
Dark-toned liquid and/or material.
Dark-toned liquid and/or material.
Medium-toned liquid and/or material.
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I FIGURE 5
I SIGMON'S SEPTIC TANK MARCH 23, 1986 APPROX. SCALE 1:2,700
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January 30, 1993 (FIGURE 6)
The resolution of the 1993 photographs is lower than that of the 1986
images; thus, some of the previously ncited details may not be identified.
The impoundment containing liquid remains visible in the northern
portion of the Sigmon's Septic Tank site, as is the excavation seen to
its south. The ground scar remains visible in the fenced area to the
south. A possible (POSS) pit is observed to the east of the fenced area.
The less-than-optimal resolution of the photographs does not allow for the
identification of the contents of the pit. Medium-toned mounded material, an
area containing refuse, and a probable trailer are all visible west of the
access road leading to the southern portion of the site.
In the southern portion of the site, IM 11 and IM 12 have been added to
the site; IM 12 is seen where a trench was visible in the 1986 photograph
(Figure 5). Impoundments 2 and 3 have been backfilled, and IM 9 and IM 10 in
the southeastern corner of the site are no longer visible. The historical
boundaries of these impoundments were transferred from 1986 (Figure 5) to this
photograph and are delineated on the overlay. Disturbed ground (DG) is now
noted in the location of the latter two impoundments.
remaining impoundments are as follows:
The contents of the
IM 1 Dark-, light-, and medium-toned liquid and/or material.
IM 4 Dark-and light-toned liquid and/or material.
IM 5 Dark-and light-toned liquid and/or material.
IM 6 Dark-and light-toned liquid and/or material.
IM 7 Dark-and light-toned liquid and/or material.
IM 8 Dark-and light-toned liquid and/or material.
IM 11 Light-and medium-toned liquid and/or material.
IM 12 Dark-toned liquid and/or material.
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FIGURE 6
SIG MON'S SEPTIC TANK JANUARY 30, 1993 APPROX. SCALE 1:2,700
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April 25, 1996 (FIGURE 7)
The impoundment in the northern portion of the Sigmon's Septic Tank
site remains visible, although it contains only a small amount of liquid
as compared to the previous analysis years. An excavation surrounds the
southern and southeastern portion of this impoundment. Light-toned material
is visible between the berm west of the impoundment and the site's western
boundary. A building has been removed to the east of the i_mpoundment; and
a new building is seen southeast of the impoundment.
surrounding the building south of the impoundment has
The fence formerly
been removed. A
probable impoundment containing liquid is observed in the west central
portion of the site.
A bermed area enclosing a rectangular-shaped excavation is visible in
the southern portion of the site. Four possible horizontal tanks (HT) are
observed to the east adjacent to the north-south trending access road. A
trailer is noted to the southeast.
A large fill area (FA) encircled by an access road is now visible where
the grouping of impoundments was seen in the southern portion of the site
since 1982. Mounded material and possible liquid (LQ) and/or staining (ST)
are noted in the northern portion of the fill area. A ground scar is observed
to the north of the fill area. The boundaries of the impoundments seen
in 1982, 1986, and 1993 were transferred from the respective years to this
photograph and are delineated on the overlay.
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FIGURE 7
SIGMON'S SEPTIC TANK APRIL 25, 1996 APPROX. SCALE 1 :2, 700
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March 14, 1998 (FIGURE 8)
In the northern portion of the Sigmon's Septic Tank site, a ground
scar is noted northeast of the impoundment, which contains liquid. West of
this impoundment probable liquid is seen at the head of a drainage channel
that leads to the west of the site. Medium-toned mounded material and
a trailer are seen in the east central portion of the site. A probable
impoundment containing probable liquid (not annotated) remains visible in the
west central portion of the site. An excavation remains visible within a
bermed area in the south central portion of the site. East of the bermed
area, the four possible horizontal tanks noted in 1996 remain.
The large fill area in the southern portion of the site remains visible.
The northern portion of this fill area contains medium-toned mounded material.
The northern portion of the fill area may be the area where, according to
collateral information, 'lagoon sludge mixed with sawdust was piled onsite
adjacent to the lagoon area' (EPA, 2002). The boundaries of the impoundments
seen in 1982, 1986, and 1993 were transferred from the respective years to
this photograph and are delineated on the overlay.
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FIGURE 8
SIG MON'S SEPTIC TANK
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• ~~~~~ • . . . :, . I[ ' ~...-: c •·:: -.:t.' 't:, ·M • • •,
]4b;-;~. ,. · , , :"';.'\t;r ti ~~ · · · · · :., ~➔ ,..., -~ -:: .. ·-~ ·'1'J";t'"°'t.~~tl,:-~ <·' ?·"-·--*-~c:26~-..J.:-'~ ~ -;_--~-"·"""1-~ """"""""'"' •.·""~ .:,•,;r -~-'_ -----_':J:,r~:?·•-· ,,,_~~--~'!:-.· '
MARCH 14, 1998 APPROX. SCALE 1:2,700
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GLOSSARY
Building (B) - A relatively permanent, essentially boxlike construction
having a roof. (NB) A building added since last photo coverage. (BR) A
building removed since last photo coverage.
Dark-, Medium-, Light-Toned (DK, MT, LT) -Tones of features in question
are compared with the darkest and lightest tones of gray (if using B&W
photographs) on the print.
Disturbed Ground (DG) - A rough area where the ground surface has been
dug up or overturned.
Excavation Area (EX) -An area where earth or other material is being removed
in order to alter the ground level.
Feature Boundary -Used to delineate the extent of a feature or area (e.g.,
tank farm, trench, large stain, open storage area).
Fill Area (FA) -An area where material is being deposited to fill a
depression, or an area where materials have been added, altering the elevation
of the ground surface.
Ground Scar (GS) -An area of bare soil, apparently the result of human
activity.
Impoundment (IM) - A liquid-containment area.
Liquid (LQ) -Used when discussing impoundments, lagoons, catchment basins,
or features that contain a liquid, or when discussing discharge from outfalls,
at storm drains, or from tank trucks.
Material (M) -Raw or waste materials on or in the vicinity of the site.
Mounded Material (MM) -Piles of raw or waste materials on or in the
vicinity of the site.
Pit - A steep-sided hole in the ground surface.
Refuse (RF) -Non-liquid waste materials or discarded items.
Signature - A characteristic, or combination of characteristics, by which a
material or object may be identified on an image or a photograph.
Site -The land or water area where any facility or activity is physically
located or conducted, including land used in connection with the facility
or activity.
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Stain (ST) - A residue or discoloration resulting from a spill, discharge,
or removed/dispersed materials.
Tank(s) -Vertical tanks (VT), horizontal tanks (HT), pressure tanks, tank
farms, and solids waste management units. A large receptacle, container, or
structure used for holding liquid or gas.
Trailer (TL) - A large van or wagon drawn by an automobile, truck, or tractor,
used especially in hauling freight by road.
Trench (TR) - A long, narrow excavation unrelated to drainage.
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MAPS
Source" Figure
USGS
USGS
1
2
REFERENCES
State of North Carolina
Troutman, North Carolina
Name
COLLATERAL INFORMATION
Scale
1:2,500,000
1:24,000
Date
1972
1993
EPA 2002. Statement of Work for Sigmon's Septic Tank Site, Statesville, North Carolina,
with collateral data supplied by EPA Region 4 as attached to EPIC Remote Sensing
Services Request Form, 04/18/02, 8pp.
LMS (Lockheed Martin Services). 2002. Master Quality Assurance Project Plan. Prepared
for EPA Environmental Sciences Division. Contract 68-D-00-267 (DCN 99-00-01-1). Las
Vegas, Nevada.
AERIAL PHOTOGRAPHS
Photo Date of Original Film Mission
Source Figure Acquisition Scale Typeb I.D.
NCDOT 3 04/27/76 1:24,000 B&W M-1250
FSA 4 05/12/82 1:40,000 B&W 37097
NCDOT 5 03/23/86 1:24,000 B&W M-1989
USGS 6 01/30/93 1:40,000 B&W NAPP
NCDOT 7 04/25/96 1:36,000 B&W M-3640
USGS 8 03/14/98 1:40,000 CIR NAPP
ausGS U.S. Geological Survey, Department of the Interior
FSA Farm Service Agency, U.S. Department of Agriculture
Source
Frame#
34 6, 34 7
177:110,111
29, 30
8166:84-86
35:1581-1583
10702:178-180
NCDOTNorth Carolina Department of Transportation, Raleigh, North Carolina
'B&W Black-and-White
CIR Color infrared
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EPA EPIC
Frame#
75802, 75803
75804, 75805
7 5806, 75807
75808-75810
75811, 75812,
77705
75813-75814