PB97-964501
EPA/541/R-97/031
November 1997
EPA Superfund
Record of Decision:
Schofield Barracks (US Army),
Operable Unit 3,
Oahu, HI
11/8/1996
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Prepared for
U.S. Army Environmental Center
Installation Restoration Division
Building No. E4480, Aberdeen Proving Ground, MD 21010-5401
FINAL
Record of Decision
Operable Unit 3
Schofield Barracks
Island of Oahu, Hawaii
August 1996
Contract No. DAAA15-94-D-0009
Delivery Order No. 0001
Prepared by
II
U&A
Uribe & Associates
Environmental Consulting Services
2930 Lakeshore Avenue, Suite 200
Oakland, California 94610-3614
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1. DECLARATION 1-1
l.l SITE NAME AND LOCATION l-l
1.2 STATEMENT OF BASIS AND PURPOSE 1-2
1.3 DESCRIPTION OF THE SELECTED REMEDY 1-3
1.4 DECLARATION STATEMENT 1-3
2. DECISION SUMMARY 2-1
2.1 SCHOFIELD BARRACKS SITE LOCATION AND DESCRIPTION 2-1
2.2 SCHOFIELD BARRACKS INSTALLATION OPERATIONAL HISTORY : .....2-3
2.3 ENFORCEMENT AND REGULATORY HISTORY 2-4
2.4 OPERABLE UNIT 3 SITE SELECTION HISTORY 2-4
2.5 HIGHLIGHTS OF COMMUNITY PARTICIPATION 2-6
2.6 SCOPE AND ROLE OF OPERABLE UNIT 3 2-8
2.7 SITE DESCRIPTIONS AND CHARACTERISTICS AND SUMMARY OF RISK ASSESSMENT 2-9
2.7.1 Site 21: Pest Control Shop, Buildings 368 and 368F 2-11
2.7.2 Site 26: Car Care Center, Building 80 2-12
2.7.3 Site 35: Optical Repair Building, Building 1054 2-15
2.7.4 Site 46: Acid Pit 2-17
2.7.5 Site 57: Pits (1942) 2-20
2.7.6 Site 59: Two Trenches (1942) 2-21
2.7.7 Site 61: Pits and Trenches (1953 - 1977) 2-22
2.7.8 Site 63: Pits (1962) 2-23
2.7.9 Site 64B: Pits (1962)..., 2-24
2.7.10 Site 72B: Maintenance Area, Building 368 2-25
2.7.11 Site 73: Motor Pool (1942) 2-27
2.7.12 Site 74: Open Storage (1977) 2-29
2.7.13 Site 80: Possible Trench (1953) 2-30
2.7.14 Site 81B: Industrial Operation, Light-Toned Material, Open Storage, and
Dark Stains (1942) 2-31
2.7.15 Site 83: Open Storage/Motor Pool Area (1950 - 1970) 2-33
2.7.16 Site 88: Motor Pool (1955 - 1978) 2-34
2.7.17 Site 90: Motor Pool (1959 - 1969), and Dark Stains (1970) 2-35
2.7.18 Site 93: Open Fire (1951) and Open Storage/Light Material/Dark
Stains (1955) 2-37
2.7.19 Site B: Maintenance Area, Building 940 2-38
2.7.20 Site C: Maintenance Area, Building 955 2-40
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2.7.21 Site D: Maintenance Area, Building 968 2-42
2.7.22 Site E: Maintenance Area, Building 986 2-45
2.7.23 Site H: Maintenance Area, Building 1080 2-48
2.7.24 Site I: Maintenance Area, Building 1124 2-50
2.7.25 Site J: Maintenance Area, Building 1180 2-52
2.726 Site K: Maintenance Area, Building 1611.... 2-54
2.7.27 Site L: Maintenance Area, Building 1621 2-56
2.7.28 Site O: Maintenance Area, Building 2400 2-58
2.7.29 Site P: Maintenance Area, Building 2420 2-60
2.7.30 Site R: Maintenance Area, Building 2460 2-62
2.7.31 Site S: Maintenance Area, Building 2480 2-64
2.7.32 Site U: Maintenance Area, Building 2600 2-67
2.7.33 Site V: Maintenance Area, Building 2620 2-68
2.7.34 Site W: Maintenance Area, Building 2640 2-70
2.8 SUMMARY OF ECOLOGICAL RISKS 2-71
2.9 SELECTION OF No ACTION ALTERNATIVE BASED ON RISK EVALUATION 2-72
2.10 DOCUMENTATION OF SIGNIFICANT CHANGES 2-72
3. RESPONSIVENESS SUMMARY 3-1
3.1 OVERVIEW 3-1
3.2 BACKGROUND ON COMMUNITY INVOLVEMENT 3-1
3.3 SUMMARY OF COMMENTS RECEIVED DURING PUBLIC COMMENT PERIOD AND
DEPARTMENT OF THE U.S. ARMY RESPONSES 3-1
PREFERENCES 4-1
5. ABBREVIATIONS / ACRONYMS 5-1
APPENDIX A: SYNOPSIS OF COMMUNITY RELATIONS ACTIVITIES A-l
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LIST OF FIGURES
FIGURE l-l: LOCATION MAP OF SCHOFIELD BARRACKS
FIGURE 1-2: SITE MAP OF SCHOFIELD BARRACKS
FIGURE 1-3: SITE LOCATIONS-MAIN POST
FIGURE 1-4: SITE LOCATIONS-EAST RANGE
FIGURE 2-1: GENERALIZED REGIONAL CROSS-SECTION
FIGURE 2-2: HYDROGRAPH, SOUTH FORK OF KAUKONAHUA STREAM Ocr89-SEP90
FIGURE 2-3: REGIONAL GROUNDWATER SYSTEMS OF OAHU, HAWAII
FIGURE 2-4: REGIONAL HYDROGEOLOGIC CROSS SECTIONS A-A' AND B-B'
FIGURE 2-5: ANALYTICAL RESULTS-SOIL, SITE 21
FIGURE 2-6: ANALYTICAL RESULTS - SOIL, SEDIMENT, & WATER, SITE 26
FIGURE 2-7: ANALYTICAL RESULTS - SOIL, SEDIMENT, & WATER, SITE 35
FIGURE 2-8: ANALYTICAL RESULTS - SOIL AND SEDIMENT, SITE 46
FIGURE 2-9: ANALYTICAL RESULTS - SOIL, SITE 57
FIGURE 2-10: ANALYTICAL RESULTS - SOIL, SITE 59
FIGURE 2-11: ANALYTICAL RESULTS - SOIL, SITE 61
FIGURE 2-12: ANALYTICAL RESULTS - SOIL, SITE 63
FIGURE 2-13: ANALYTICAL RESULTS - SOIL, SITE 64B
FIGURE 2-14: ANALYTICAL RESULTS - SOIL, SITE 72B
FIGURE 2-15: ANALYTICAL RESULTS - SOIL, SITE 73
FIGURE 2-16: SOIL-GAS SAMPLING LOCATIONS, SITE 74
FIGURE 2-17: ANALYTICAL RESULTS - SOIL, SITE 80
FIGURE 2-18: ANALYTICAL RESULTS - SOIL, SITE 81B
FIGURE 2-19: ANALYTICAL RESULTS - SOIL, SITE 83
FIGURE 2-20: ANALYTICAL RESULTS - SOIL, SITE 88
FIGURE 2-21: ANALYTICAL RESULTS - SOIL, SITE 90
FIGURE 2-22: ANALYTICAL RESULTS - SOIL, SITE 93
FIGURE 2-23: ANALYTICAL RESULTS - SOIL & SEDIMENT, SITE B
FIGURE 2-24: ANALYTICAL RESULTS - SOIL & SEDIMENT, SITE B
FIGURE 2-25: ANALYTICAL RESULTS - SOIL & SEDIMENT, SITE C
FIGURE 2-26: ANALYTICAL RESULTS - SOIL & SEDIMENT, SITE D
FIGURE 2-27: ANALYTICAL RESULTS(ORGANICS) - SOIL, SEDIMENT, & WATER, SITE E
FIGURE 2-28: ANALYTICAL RESULTS(METALS) - SOIL, SEDIMENT, & WATER, SITE E
FIGURE 2-29: ANALYTICAL RESULTS - SOIL, SEDIMENT, & WATER, SITE H
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FIGURE 2-30: ANALYTICAL RESULTS - SOIL & SEDIMENT, SITE I
FIGURE 2-31: ANALYTICAL RESULTS - SOIL & SEDIMENT, SITE J
FIGURE 2-32: ANALYTICAL RESULTS - SOIL, SEDIMENT, & WATER, SITE K
FIGURE 2-33: ANALYTICAL RESULTS - SOIL & SEDIMENT, SITE L
FIGURE 2-34: ANALYTICAL RESULTS - SOIL, SEDIMENT, & WATER, SITE O
FIGURE 2-35: ANALYTICAL RESULTS - SOIL, SEDIMENT, & WATER, SITE P
FIGURE 2-36: ANALYTICAL RESULTS - SOIL, SEDIMENT, & WATER, SITE R
FIGURE 2-37: ANALYTICAL RESULTS - SOIL, SEDIMENT, & WATER, SITE S
FIGURE 2-38: ANALYTICAL RESULTS - SOIL & SEDIMENT, SITE U
FIGURE 2-39: ANALYTICAL RESULTS - SOIL, SITE V
FIGURE 2-40: ANALYTICAL RESULTS - SOIL & SEDIMENT, SITE W
FIGURE 2-41: EXPLANATION OF FLAGGING CODES
IV
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LIST OF TABLES
TABLE 2-1: SUMMARY OF CONCENTRATION RANGES FOR PESTICIDES IN SOIL/SEDIMENT-
1995, SITE 21
TABLE 2-2: CONCENTRATION RANGES FOR ORGANIC COMPOUNDS DETECTED IN
SOIL/SEDIMENT-1995
TABLE 2-3: CONCENTRATION RANGES FOR INORGANIC POTENTIAL CONSTITUENTS OF
CONCERN IN SoiL/SEDiMENT-1995
TABLE 2-4: CONCENTRATION RANGES FOR ORGANIC COMPOUNDS DETECTED IN SURFACE
WATER-1995
TABLE 2-5: CONCENTRATION RANGES FOR INORGANIC POTENTIAL CONSTITUENTS OF
CONCERN IN SURFACE WATER -1995
TABLE 2-6: MAXIMUM VALUES OF CALCULATED HAZARD INDICES (HI) AND CANCER RISK
VALUES
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1. DECLARATION
This Record of Decision (ROD) for Operable Unit (OU) 3 was prepared by Uribe and
Associates (U&A) for the U.S. Army Environmental Center (USAEC) under Delivery
Order 0001 (Task 01) of the Total Environmental Program Support (TEPS) Contract
DAAA15-94-D-0009. This ROD documents the remedial action plan for OU 3 at
Schofield Barracks (SB), Island of Oahu, Hawaii.
1.1 Site Name and Location
SB was established by the U.S. Department of the Army (U.S. Army) in 1908 and is the
largest Army post outside the continental United States. SB is located in the north-
central plateau of the Island of Oahu in the State of Hawaii (Figure 1-1). The SB
installation is located approximately 22 miles northwest of the City of Honolulu. The
closest municipality is Wahiawa. Most of the town of Wahiawa lies adjacent to and
immediately north of the East Range section of SB.
SB is divided into two sections by Interstate Highway H2 and the area occupied by
Wheeler Army Airfield (not part of SB). The Main Post section of SB is located west of
Interstate Highway H2, and the East Range section is located east of Wheeler Army
Airfield and Interstate Highway H2 (Figure 1-2). SB encompasses a total area of
approximately 27.7 square miles.
A Federal Facility Agreement (FFA) was signed by the U.S. Army on September 23, 1991,
by the U.S. Environmental Protection Agency (U.S. EPA) on September 27, 1991, and by
the Hawaii Department of Health on June 5, 1996. Four operable units were established
under the auspices of the FFA. The following 34 sites, located in the Main Post and East
Range sections of SB (Figures 1-3 and 1-4), were selected for investigation under OU 3.
Site 21: Pest Control Shop, Buildings 368 and 368F
Site 26: Car Care Center, Building 80
Site 35: Optical Repair Building, Building 1054
Site 46: Acid Pit
Site 57: Pits (1942)
Site 59: Two Trenches (1942)
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Site 61: Pits and Trenches (1953 - 1977)
Site 63: Pits (1962)
Site 64B: Pits (1962)
Site 72B: Maintenance Area, Building 368
Site 73: Motor Pool (1942)
Site 74: Open Storage (1977)
Site 80: Possible Trench (1953)
Site 81B: Industrial Operation, Light-Toned Material, Open Storage, and
Dark Stains (1942)
Site 83: Open Storage/Motor Pool Area (1950 - 1970)
Site 88: Motor Pool (1955 - 1978)
Site 90: Motor Pool (1959 - 1969), and Dark Stains (1970)
Site 93: Open Fire (1951) and Open Storage/Light Material/Dark Stains
(1955)
Site B: Maintenance Area, Building 940
Site C: Maintenance Area, Building 955
Site D: Maintenance Area, Building 968
Site E: Maintenance Area, Building 986
Site H: Maintenance Area, Building 1080
Site I: Maintenance Area, Building 1124
Site J: Maintenance Area, Building 1180
Site K: Maintenance Area, Building 1611
Site L: Maintenance Area, Building 1621
Site O: Maintenance Area, Building 2400
Site P: Maintenance Area, Building 2420
Site R: Maintenance Area, Building 2460
Site S: Maintenance Area, Building 2480
Site U: Maintenance Area, Building 2600
Site V: Maintenance Area, Building 2620
Site W: Maintenance Area, Building 2640
1.2 Statement of Basis and Purpose
This ROD presents a response action for OU 3, which consists of the 34 sites listed in
Section 1.1. These sites were selected in accordance with the Comprehensive
Environmental Response, Compensation and Liability Act (CERCLA) of 1980 as
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amended by the Superfund Amendments and Reauthorization Act (SARA) of 1986 and
to the extent practicable, the National Oil and Hazardous Substances Pollution
Contingency Plan. This ROD explains the basis for selecting the response action for the
34 sites comprising OU 3. Information supporting the selected response action is
contained in the Administrative Record for SB. The U.S. EPA and the State of Hawaii
concur with the selected response action (remedy).
1.3 Description of the Selected Remedy
On the basis of data collected at the OU 3 sites, no response action is necessary for the
34 sites included in OU 3 because these sites do not pose a threat to human health or the
environment.
1.4 Declaration Statement
No response action is necessary to protect human health or the environment at the OU 3
sites. This "no remedial action" alternative was selected because no contaminants found
at OU 3 were present at concentrations that pose an unacceptable risk to human health or
the environment based on U.S. EPA risk guidelines.
The "no remedial action" alternative is protective of human health and the environment
and complies with federal and State of Hawaii requirements that are legally applicable or
relevant and appropriate to the remedial action. This action is a permanent solution to
the maximum extent practicable or necessary for OU 3. Because this action will not result
in hazardous substances remaining on site exceeding unacceptable health-based levels, the
five-year review will not apply to this action.
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James
BG, U.S.
Acting
25th
and US
Division (Light)
iy, Hawaii
Record of Decision
Schofield Barracks Operable Unit 3
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Chief, Federal Facilities Cleanup Branch
U.S. EPA, Region 9
Record of Decision
Schofield Barracks Operable Unit 3
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Lawrence Miike, M.D.
Director of Health
State of Hawaii
Record of Decision
Schofield Barracks Operable Unit 3
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2. DECISION SUMMARY
This section provides an overview of the site-specific factors and analysis that led to the
selection of the "no remedial action" decision for OU 3. The overview includes the
following descriptions, histories, summaries, and conclusions:
A general description of SB location and regional setting.
A brief history of past operations at SB.
A brief history of regulatory and enforcement actions that identified the
purpose of OU 3.
A brief summary of reasons -for including specific sites in OU 3.
A summary of characteristics for each site within OU 3 including a plan of
facilities indicating potential sources of hazardous materials and potential
pathways for released hazardous materials.
A summary of target analytes that were considered potential constituents of
concern (COCs) at each site during the remedial investigation of OU 3.
A summary of the human health risk and ecological risk assessments of each
site within OU 3.
A summary of the selection of the "no remedial action" based on the risk
assessment for each site within OU 3.
A description of significant changes to the selected remedy.
Much of the information presented in this overview was derived from previous
assessment and investigations performed by the U.S. Army, its contractors, and the U.S.
EPA. Results and conclusions of these assessments and investigations are presented in
greater detail in the Preliminary Assessment reports (HLA, 1993; IMS, 1993), Field
Screening Sampling and Analysis Plan (FSSAP) (IMS, 1994), and Final Remedial
Investigation Report (U&A, 1996).
2.1 Schofield Barracks Site Location and Description
SB is situated within the physiographic province known as the Schofield Plateau. The
Schofield Plateau is bounded on the east by the Koolau Mountain Range and on the west
by the Waianae Mountain Range (Figure 1-1). The surface topography of SB varies from
nearly flat, near the central portion around Wheeler Army Airfield, to steeply sloping and
dissected terrain that rises up the flanks of the Koolau and Waianae ranges. Surface
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elevations range from approximately 700 feet above the National Geodetic Vertical
Datum of 1929 (NGVD), near the flat central portion, to approximately 3,700 feet above
NGVD, near the western boundary of the Main Post in the Waianae Range (Figure 2-1).
The relatively flat Schofield Plateau was formed by lava flows from the ancient Koolau
volcanoes that converged and overlapped the flank of the Waianae volcanoes in the
central part of Oahu. The crest of this plateau runs roughly east-west through the center
of the Main Post and forms the natural surface water drainage divide. North of this
divide, watercourses flow to the north and discharge into Kaiaka Bay at the town of
Haleiwa. South of this divide, watercourses flow south and discharge into the West Loch
of Pearl Harbor. Narrow gulches dissect the plateau where streams have eroded the land
surface. The steeper, deeper gulches generally originate in the Koolau Range where
substantially more rain falls than in the Waianae Range. Although in-situ weathering of
the basaltic bedrock has progressed to depths of 100 to 200 feet, erosion has only
partially dissected the plateau surface, primarily along principal drainages.
Streams on the Schofield Plateau do not lose large volumes of water to groundwater, nor
do they gain appreciably from groundwater. figure 2-2 represents a portion of a stream
hydrograph for the South Fork of Kaukonahua Stream near Wahiawa (Matsuoka and
others, 1991), from October 1989 to September 1990. The hydrograph's data suggest
abundant runoff but little baseflow from delayed discharge of groundwater to the stream.
Except for areas below dams, streamflow is generally perennial, with little contribution
from groundwater leakage (Dale and Takasaki, 1976). Streams near SB are also thought
to provide little recharge-to the groundwater. A water-balance calculation presented by
Dale and Takasaki (1976) shows that leakage from Wahiawa Reservoir to the Schofield
High-Level Water Body is small because of the low permeability of the clay-rich soil
(saprolite) that underlies the reservoir.
The relatively flat Schofield Plateau was formed as basaltic lava flowed from the
adjacent Koolau and Waianae volcanoes to the east and west, respectively. The upper
100 to 200 feet of the basaltic bedrock within the Schofield Plateau is weathered
saprolite. The saprolite consists of soil (primarily fine-grained material including silt and
clay) formed by in situ decomposition of the basaltic bedrock. The saprolite is underlain
by relatively unweathered basaltic bedrock. Logs of wells constructed at SB indicate that
basalt extends at least 1,000 feet below ground surface.
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Three types of ground water systems have been identified in central Oahu: the Schofield
High-level Water Body, basal groundwater, and dike-impounded groundwater (Figures
2-3 and 2-4). The Schofield High-level Water Body is located beneath the Schofield
Plateau, and therefore beneath OU 3. This water body is bound on the east and west
sides by dike-impounded groundwater and on the north and south by basal groundwater.
Lower permeable rocks (possibly volcanic dike and/or buried ridges) structurally
separate these groundwater systems from one another. The Schofield High-level Water
Body aquifer has a relatively high transmissivity and hydraulic conductivity. The depth
to groundwater beneath SB is approximately 600 feet below ground surface.
Situated south of the Tropic of Cancer at approximately 21 degrees north latitude, SB has
a climate characterized by moderate temperatures that remain relatively constant
throughout the year. The average annual rainfall in the vicinity of SB is approximately 47
inches (Giambelluca and others, 1986). More than half of this amount occurs during the
rainy season from November through February. High-pressure cells north of Oahu are
responsible for most trade wind flow. These winds blow from the northeast at an average
speed of 12 knots and prevail 70 percent of the time.
Because of the relatively large amounts of undeveloped land and a relatively large amount
of vertical relief, SB is host to diverse and abundant flora and fauna. Undisturbed
natural vegetation at SB is found primarily in the steep gulches on the south and west
sides. These gulches support blocks of forestry plantings and dense growth of shrubbery.
Birds are commonly observed in the forested gully areas at SB where food sources and
nesting sites are available'.'
2.2 Schofield Barracks Installation Operational History
SB was established in 1908 to provide a base for the U.S. Army's defense of Pearl Harbor
and the island of Oahu. Initial construction of the post occurred between 1909 and 1917
when more than 250 buildings were erected. During the 1920s, expansion of SB continued
when infantry, cavalry, and artillery regiments were joined by a regional battalion, an
ordnance company, an ammunition team, a tank company, a medical regiment, a
maintenance squadron, and chemical gas regiment units. These types of units continue to
operate at SB.
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SB became a supply base and command center during World War n temporarily housing
more than 1,000,000 troops. It also served as a support and basic training center for
troops bound for the Korean War and the Vietnam conflict. SB continues to be the largest
and most-populated military installation outside the continental United States.
SB currently serves as headquarters for the 25th Infantry Division and 45th Support
Group. The mission of SB is to provide administration, training, and housing facilities for
these two units; it also provides depot and repair facilities, a medical facility, and
community and housing support.
2.3 Enforcement and Regulatory History
Trichloroethylene, a commonly used cleaning solvent, was detected in the Schofield
Barracks water-supply wells in 1985. The source of the trichloroethylene (TCE)
contamination could not be identified. In September 1986, the U.S. Army installed air-
stripping treatment units to remove TCE from the Schofield Barracks domestic water
supply. In 1987, the EPA established a Maximum Contaminant Level (MCL) for TCE of
5 parts per billion in drinking water. TCE has not been detected in the Schofield
Barracks' treated groundwater at concentrations greater than this U.S. EPA-established
limit.
The FFA was negotiated between the U.S. EPA, the State of Hawaii, and the U.S. Army
under CERCLA, Section 120. It was signed by the U.S. Army on September 23, 1991, by
the U.S. EPA on September 27,1991, and by the Hawaii Department of Health on June 5,
1996. The FFA identifies SB as a facility under the jurisdiction, custody, or control of the
Department of Defense (DOD) and subject to the Defense Environmental Restoration
Program (DERP).
There have been no enforcement actions at OU 3.
2.4 Operable Unit 3 Site Selection History
As part of the FFA, the U.S. Army and regulatory agencies agreed to divide the program
into subunits called operable units to address potential areas of contamination at SB in
an organized manner. OU 1 consists of sites suspected to be likely sources of TCE
detected in the groundwater. OU 2 addresses basewide groundwater contamination.
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Other potential sources of soil, surface water, or groundwater contamination at SB,
excluding the SB landfill, were included in OU 3. OU 4 consists of the SB landfill. This
ROD addresses OU 3.
The FFA initially identified 46 sites within OU 3. The preliminary assessment (PA) of
these sites redefined a number of sites, dividing some sites into multiple sites, resulting in
an increase in the number of sites from 46 to 63. The PA involved a site reconnaissance
and extensive records searches to assess whether past or present activities at these sites
could have resulted in contaminant releases. The PA recommended 18 sites for further
remedial investigation (HLA, 1993).
U.S. EPA subsequently added 37 new sites to OU 3. These sites were identified by the
Environmental Photographic Interpretation Center (EPIC) as possible sources of
contamination based on interpretation of aerial photographs taken from 1942 to 1985.
The preliminary assessment of these 37 new sites redefined a number of sites, increasing
the number from 37 to 41 sites. The PA recommended 14 of the 41 sites for further
remedial investigation (IMS, 1993). Two more sites were recommended for further
remedial investigation after consultations between the U.S. Army and U.S. EPA.
Based on the results of both preliminary assessments, further remedial investigations (RIs)
were completed at the following 34 sites within OU 3:
Site 21: Pest Control Shop, Buildings 368 and 368F
Site 26: Car Care Center, Building 80
Site 35: Optical Repair Building, Building 1054
Site 46: Acid Pit
Site 57: Pits (1942)
Site 59: Two Trenches (1942)
Site 61: Pits and Trenches (1953 - 1977)
Site 63: Pits (1962)
Site 64B: Pits (1962)
Site 72B: Maintenance Area, Building 368
Site 73: Motor Pool (1942)
Site 74: Open Storage (1977)
Site 80: Possible Trench (1953)
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Site 81B: Industrial Operation, Light-Toned Material, Open Storage, and
Dark Stains (1942)
Site 83: Open Storage/Motor Pool Area (1950 -1970)
. Site 88: Motor Pool (1955 - 1978)
Site 90: Motor Pool (1959 - 1969), and Dark Stains (1970)
Site 93: Open Fire (1951) and Open Storage/Light Material/Dark Stains
(1955)
Site 6: -Maintenance Area, Building 940
Site C: Maintenance Area, Building 955
Site D: Maintenance Area, Building 968
Site E: Maintenance Area, Building 986
Site H: Maintenance Area, Building 1080
Site I: Maintenance Area, Building 1124
Site J: Maintenance Area, Building 1180
Site K: Maintenance Area, Building 1611
Site L: Maintenance Area, Building 1621
Site O: Maintenance Area, Building 2400
Site P: Maintenance Area, Building 2420
Site R: Maintenance Area, Building 2460
Site S: Maintenance Area, Building 2480
Site U: Maintenance Area, Building 2600
Site V: Maintenance Area, Building 2620
Site W: Maintenance Area, Building 2640
RI field activities at the 34 OU 3 sites were conducted in phases from November 1994 to
October 1995. The RI involved an extensive program of soil-gas, surface and subsurface
soil, sediment, and /or surface water sampling. The results of the RI are presented in the
Final Remedial Investigation Report, dated March, 1996. This report, along with reports
of previous OU 3 assessments and investigations, is available in the Administrative
Record for SB.
2.5 Highlights of Community Participation
In an effort to involve the public, the U.S. Army has undertaken several public and
community awareness efforts including issuing employee bulletins and posting newspaper
articles for SB employees, offering media interviews, issuing news releases, and holding
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meetings with local officials and neighborhood boards for offpost residents. In addition,
the U.S. Army has held public meetings, issued fact sheets, and established a U.S. Army
contact for the public at SB Public Affairs Office. Copies of work plans, technical
reports, fact sheets, and other materials related to the project are available for public
review at the following local repositories:
Milliard Public Library
95-450 Makaimoimo Street
Mililani, Hawaii 96879
Wahiawa Public Library
820 California Avenue
Wahiawa, Hawaii 96786
U.S. Army Garrison, Hawaii
Directorate of Public Works
Building 105
Wheeler Army Airfield, Hawaii 96786
State of Hawaii Department of Health
Environmental Quality Control Office
465 South King Street
Honolulu, Hawaii 96813
The U.S. Army prepared a Proposed Plan for OU 3 at SB for public review and comment.
The plan was distributed on April 11,1996. The Proposed Plan summarizes information
collected during OU 3 PA and RI activities and identifies other documents in the
Administrative Record for SB that are available at the local repositories.
Comments regarding the Proposed Plan were accepted during a 30-day public review and
comment period that extended from April 11 to May 11, 1996. A public meeting was
held on May 1,1996, to provide the community an opportunity to discuss the plan with
the U.S. Army, U.S. EPA, and the State of Hawaii Department of Health (HDOH).
Responses by the U.S. Army to comments received during the public comment period
were sent to the commentor and are included in the Responsiveness Summary of this ROD
(Section 3.0). The public comment period is a continuation of the U.S. Army's
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commitment to community involvement in the Schofield Barracks Installation Restoration
Program (IRP) and is required by CERCLA.
2.6 Scope and Role of Operable Unit 3
The role of OU 3 in the overall National Priorities List (NPL) program for SB is to identify
and eliminate sources of contaminants not covered in OUs 1, 2, or 4 for SB. SB sites other
than OU 3 sites that were suspected to be sources of TCE contamination were addressed
in OU 1. Basewide groundwater contaminated with TCE is addressed under OU 2. OU
4 addresses contamination at the Former SB Landfill.
The objectives for the OU 3 program are to do the following:
Assess the presence or absence of contaminants at the 34 sites.
Assess the extent of contamination if contaminants are found at these sites.
Assess the environmental and human health risks posed by this
contamination, if present.
Identify and evaluate remedial alternatives for site cleanup if contaminants are
present in levels that endanger human health or the environment.
Cleanup site contamination to levels that protect human health and the
environment by implementing the preferred remedial alternative.
A PA and/or RI was performed for each of the initial 46 sites identified in the FFA, the
37 sites added after photographic interpretation by EPIC and the two sites added after
discussions between the U.S. Army and U.S. EPA. Chemicals contained in petroleum
hydrocarbons, oil and grease, solvents, battery fluids, pesticides, and polychlorinated
biphenyls (PCBs) were the primary potential constituents of concern that were targeted
for analysis in samples collected in OU 3 investigations. RI activities conducted at the
OU 3 sites included surface geophysics, shallow and deep soil-gas sampling, surface soil
sampling, deeper soil sampling, surface water sampling, and/or sediment sampling. The
results of the investigations indicate that no current or potential threat to human health or
the environment exists at OU 3. Therefore, no remedial action is necessary to protect
human health and the environment at the OU 3 sites. For this reason, a feasibility study
(FS) to evaluate alternatives for remediating the OU 3 sites was not performed.
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2.7 Site Descriptions and Characteristics and Summary of Risk
Assessment
The locations of the 34 sites investigated under the OU 3 RI are shown on Figures 1-3 and
1-4. Twenty-nine of the sites are located on the SB Main Post, and the remaining five
sites are located within the East Range section of SB. Sections 2.7.1 through 2.7.34
summarize, on a site-by-site basis, site description information including facilities, past
operations, potential sources of contaminants, and potential pathways for released
contaminants; information on site characteristics including field investigation activities
and results; and human health risk assessment findings. A brief overview of the
approach and rationale used to conduct the field investigations and human health risk
assessments for the OU 3 sites is provided in the paragraphs below.
Field Investigations
Field investigations conducted at each OU 3 site consisted of one or more of the following
activities: geophysical surveying, soil-gas survey (SGS) sampling, soil-boring sampling,
sediment sampling, and surface water sampling. The sampling program for each site was
developed based on site information and PA results. SGS sampling was conducted at 26
OU 3 sites and used as a screening tool to identify areas within a site where volatile
organic compounds (VOCs) may be present. Soil-gas data, information from the PA,
and /or data from previous sampling was used to select shallow soil and deeper soil
sampling locations. Soil boring samples were collected at 33 sites. Sediment sampling
was conducted at 18 sites based on information gathered during the PA. At nine of the
18 sites, surface water samples were also collected at or near the sediment sample
locations.
SGS samples were analyzed for total volatile hydrocarbons (TVH); fuel-related aromatic
VOCs, including benzene, toluene, ethyl benzene, and total xylenes (BTEX); and solvents,
including carbon tetrachloride, chloroform, methylene chloride, tetrachloroethene (PCE),
1,1,1-trichloroethane (1,1,1-TCA), 1,1,2-TCA, TCE, and vinyl chloride. Chemical
analyses performed on soil boring, sediment, and surface water samples were selected
based on historical site use and field judgment and included total petroleum
hydrocarbons (TPH) as gasoline (TPH-G), TPH as diesel (TPH-D), TPH as oil (TPH-O),
VOCs, semi-volatile organic compounds (SVOCs), metals and cyanide, and/or pesticides
and polychlorinated biphenyls (PCBs). Specific laboratory analytical methods are
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identified in the Final OU 3 Remedial Investigation Report (U&A, 1996). Analytical
results were evaluated using available information and regulatory guidance to identify
analytes which appear to be naturally occurring and analytes representing potential
COCs in soil, sediment, and/or surface water at each site. A detailed discussion of the
data assessment and identification of potential COCs is provided in the OU 3 RI report.
TPH, VOCs, SVOCs, pesticides, and PCBs detected in the soil and sediment samples are
not considered to be naturally occurring chemicals at SB. With the exception of TPH-G,
TPH-D, and TPH-O, concentrations of these constituents that were detected were treated
as organic potential COCs unless the laboratory reports indicated that the constituent
was a likely laboratory contaminant. The presence of TPH-G, TPH-D, and/or TPH-O
was important for tracing potential sources of contamination.
In conjunction with an RI of the OU 1 sites conducted in 1993 and 1994, Harding Lawson
Associates (HLA) collected a series of surface and subsurface soil samples to serve as
background samples (HLA, 1995) for establishing concentrations of inorganic analytes in
native soils. HLA collected samples from a total of 16 locations (Figure 1-2) within the
Main Post and East Range Areas of SB. The background sampling points were selected in
areas where there was no apparent evidence of past or present agricultural, military,
industrial, or commercial activities. The data from these samples were used to assess
whether the concentrations of inorganic constituents detected at SB were representative of
natural conditions.
Tables 2-1 through 2-5 summarize the range of concentrations for organic constituents
detected at each site that are not naturally occurring and summarize the range of
concentrations for inorganic constituents detected at each site that are potential COCs for
human health. Figures are used to show the location of each sample relative to potential
sources.
Human Health Risk Assessment
Table 2-6 presents the risks calculated for OU 3 on a site-by-site basis. Two HI and
cancer risk values are given for each site in the table. The off-base values were calculated
for residential exposure in the communities adjacent to SB. The on-site values were
calculated for people living or working at each individual site. HI and cancer risk values
are not reported for Site 74 or Site 83, because no potential COCs were identified at these
sites. All of the HI and cancer risk values in Table 2-6 are within or below the acceptable
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range. Sections 2.7.1 through 2.7.34 describe the potential COCs, any uncertainties in the
identification of potential COCs, the environmental media used in the risk assessment,
and the exposed population for each individual site. A detailed site-by-site risk
assessment for the 34 sites within OU 3, including the approach and rationale used in the
risk assessment, is presented in the RI Report in Section 2.4 and Appendix H. Results of
the risk assessment are in the site-by-site discussions in Sections 3.2 through 3.35 of the RI
Report.
2.7.1 Site 21: Pest Control Shop, Buildings 368 and 368F
Site Description
Site 21, Figure 2-5, consists of the pesticide mixing area west of Building 368 and the bare
soil south of the area. The asphaltic paving comprising the mixing area is broken, and soil
is exposed beneath the mixing area. A shallow drainage swale exists south of Building
368F and is included in Site 21. Site 21 is adjacent to and shares some of the features of
Site 72B. The storm drain and sewer lines in the vicinity of Sites 21 and 72B were
investigated separately after consultation between the U.S. Army and regulatory agencies.
The mixing area was used from 1969 to 1984, and the area is no longer used to prepare
mixtures of pesticides (HLA, 1993; IMS, 1994). Pesticides are still stored in Buildings
368, 368F, and 380.
The potential sources of contamination identified were the mixing area and Building 368F.
The potential migration pathways identified were the shallow drainage swales leading
northwest and south of the paved mixing area.
Site Characteristics
Eleven soil boring samples were collected from 3 locations at Site 21 (Figure 2-5). The
samples were analyzed for pesticides and PCBs. The analytical results are summarized
in Table 2-1 and on Figure 2-5. PCBs were not detected in any of the soil boring samples
collected at the site. Pesticides were found at each of the three soil borings. Pesticides
that were identified as potential COCs are listed in the human health risk summary
below.
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The distribution of the analytes appears consistent with a release of pesticides at the
former mixing area and/or its associated storage shed (Building 368F) and with the
migration of these compounds off site. The migration has probably been caused by runoff
and extends between 70 and 90 feet away from the mixing area. The distribution of the
pesticides also indicates subsurface migration of a number of the compounds to at least
19.5 feet bgs, attenuated with depth in both the number of detected compounds and their
concentrations. For example, aldrin was detected in the four samples collected from
boring #1 at concentrations that decline steadily from 0.00644 mg/kg at 0.5 feet bgs to
0.00114 mg/kg at 19.5 feet bgs. Attenuation of aldrin with depth is also observed in the
samples collected from borings #2 and #3.
Past surface spills, surface runoff, and water damage to containers are the suspected
sources and /or causes of the releases of the pesticides. Poorly maintained surfacing at
the site, including broken asphalt and bare soil, is suspected to have contributed to the
migration of these analytes into the subsurface.
Summary of Human Health Risks
Site 21 is currently an industrial site, but future plans call for the construction of barracks
at this site. Therefore, on-site risk was assessed for both residential and industrial
populations based on exposure to potential COCs in site soils. The potential COCs at
Site 21 included alpha-benzene hexachloride, alpha-chlordane, aldrin, beta-HCH,
dieldrin, endosulfan n, endrin aldehyde, gamma-chlordane, heptachlor, heptachlor
epoxide, lindane, methoxychlor, rhothane, 2-bis(p-chlorophenyl)-l,l-dichloroethene
(DDE), and 2,2-bis(p-chlorophenyl)-l,l,l-trichloroethane (DDT). The risk assessment
indicates that the potential COCs identified at Site 21 do not present an unacceptable
risk to human health.
2.7.2 Site 26: Car Care Center, Building 80
Site Description
Site 26, Figure 2-6, is an active automobile fueling and servicing facility located on the
Main Post. Site 26 currently includes a convenience store, automotive service bays, six
underground fuel tanks, one pump island with four fuel dispensers, one underground
service bay sump, and temporary storage for used batteries. Much of the site is paved,
with landscaped areas around the perimeter of the paved areas.
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Site 26 has stored and dispensed fuel products since 1957. The initial fueling facility was
constructed in 1957 and replaced in 1986. No other uses for the site were reported during
previous assessments and investigations.
Potential sources of contamination identified at Site 26 are the former drum storage area
east of Building 80 outside the existing fencing, the former tank basin located in the
vicinity of the former drum storage area, one 10,000-gallon gasoline underground storage
tank (UST) found to be leaking in 1992, the existing service bay sump, and the temporary
battery storage area. Potential pathways for releases from the site include the sanitary
sewer and storm drain lines and unpaved drainage areas southwest of the fueling facility,
particularly two stained soil areas.
Site Characteristics
SGS samples were collected at 18 locations, soil boring samples were collected from 13
locations, sediment samples were collected from two locations, and two surface water
samples were collocated with the sediment samples (Figure 2-6).
Twenty-one SGS samples were collected from the 18 sampling locations. Concentrations
of TVH and aromatic VOCs related to fuel products (ethyl benzene and total xylenes)
were detected in a number of the SGS samples, ranging from 0.035 parts per million by
volume (ppmv) to 9.3 ppmv. The highest concentrations of TVH were found in
landscaped and unpaved areas to the southeast of the site's USTs.
Thirty soil boring and two sediment samples were collected at Site 26. Samples were
analyzed for TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. Analysis results
are summarized in Tables 2-2 and 2-3 and on Figure 2-6. TPH-G was not detected in any
of the soil boring or sediment samples collected at the site. TPH-D was found at seven
soil borings and in both sediment samples, with a maximum concentration of 1,780
mg/kg. Acetone was found at two soil borings, with a maximum concentration of 0.048
mg/kg. Ethyl benzene was found at one soil boring at 0.0011 mg/kg. Methylene chloride
was found at four soil borings, with a maximum concentration of 0.004 mg/kg. The
methylene chloride reported in the soil boring samples was considered to be a laboratory
contaminant. Total xylenes were found at one soil boring at 0.0017 mg/kg. Bis(2-
ethylhexyl) phthalate was found in one sediment sample at 0.503 mg/kg. Organic
constituents selected as potential COCs are listed in the human health risk summary
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below. Lead was the only inorganic potential COC identified in soil boring and sediment
samples at Site 26. Lead concentrations greater than background levels were found at
two soil borings and in one sediment sample.
The two surface water samples were collocated with the sediment samples. Analysis
results are summarized in Tables 2-4 and 2-5. TPH-D was found in one sample at 700
ug/L. Cobalt, copper, cyanide, lead, nickel, and zinc were the inorganic potential COCs
identified in the surface water samples.
Organic and inorganic potential COCs at Site 26 appear to be limited to one of the
reported areas of soil discoloration in the southern part of the site, the area of the former
USTs and drum storage in the east comer of the site, and the drainage ditches in the
southwest portion of the site. Surface spills and runoff are the suspected sources of the
TPH-D, acetone, ethyl benzene, and total xylenes found in the soil boring samples
collected from these areas. Surface spills and runoff are also the suspected sources of the
lead detected in the surface sample collected from boring #3, drilled in the area of soil
discoloration.
Surface spills and runoff from the central portion of the site and the parking areas to the
south and southwest of the fuel dispensers are the suspected sources of the TPH-D,
bis(2-ethylhexyl) phthalate, and lead detected in the sediment samples. Surface spills
and runoff are also the suspected sources of the TPH-D, cobalt, copper, cyanide, lead,
nickel, and zinc detected in the surface water samples.
Summary of Human Health Risks
Site 26 is an industrial site, and on-site risk was assessed for industrial populations
based on exposure to potential COCs in site soils. Because surface water run-off from
Site 26 may flow to areas to which residential populations have access, risk was also
assessed for residential exposure to potential COCs in surface water. The potential
COCs in soil at Site 26 included methylene chloride, acetone, ethyl benzene, total xylenes,
bis(2-ethylhexyl)phthalate, and lead. The potential COCs in surface water were cobalt,
copper, cyanide, lead, nickel, and zinc. Based on the risk assessment, the potential COCs
identified at Site 26 do not present an unacceptable risk to human health.
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2.7.3 Site 35: Optical Repair Building, Building 1054
Site Description
Site 35, figure 2-7, consists of Buildings 1054, 1054A, 1054C, 1054D, paved areas
surrounding Building 1054, unpaved areas along the southwest and southeast sides of the
site, and an unlined drainage ditch along the southwest side of the site. Historical records
indicate that the buildings were built between 1942 and 1987.
Historical uses of the site include welding and machining, canvas repair, radiator repair,
glass replacement, and vehicle body and fender repair (IMS, 1994). Vehicle maintenance
was the primary operation from 1942 to 1950. Optical repair operations were added in
1950 and continued until 1987.
The potential sources of contamination that were identified in preliminary assessments
(based primarily on the historical uses of the site) are listed below.
Maintenance shops located inside Building 1054
Miscellaneous non-hazardous storage areas inside Building 1054C
Oil storage areas inside Building 1054D
The steam wash rack south of Building 1054A
The grease rack southeast of Building 1054
The location of a former 750-gallon diesel fuel tank removed in 1992
The sanitary sewer and storm drain lines at the site were identified as potential pathways
of contaminants released from the sources listed above. The potential sources and
pathways identified for Site 35 were investigated in OU 3.
Site Characteristics
SGS samples were collected at 17 locations, soil boring samples were collected from 13
locations, sediment samples were collected from two locations, and a surface water
sample was collocated with one of the sediment samples (Figure 2-7).
Nineteen SGS samples were collected from the 17 sampling locations. Concentrations of
TVH, aromatic VOCs related to fuel products (benzene, toluene, ethyl benzene, and total
xylenes), and a solvent (1,1,2-TCA) were detected in a number of the SGS samples.
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ranging from 0.027 ppmv to 50 ppmv. The highest concentrations of TVH were found in
the paved area on the southwest side of Building 1054.
Thirty-nine soil boring and two sediment samples were collected at Site 35. The samples
were analyzed for TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. The
analytical results are summarized in Tables 2-2 and 2-3 and on Figure 2-7. TPH-G was
found at three soil borings, with a maximum concentration of 261 mg/kg. TPH-D was
found at five soil borings, with a maximum concentration of 1,450 mg/kg. Acetone was
found at two soil borings, with a maximum concentration of 0.5 mg/kg. 2-Butanone was
found at one soil boring at 0.093 mg/kg. Carbon disultide was found at two soil borings,
with a maximum concentration of 0.003 mg/kg. PCE was found at three borings, with a
maximum concentration of 0.0069 mg/kg. Methylene chloride was found at one soil
boring, with a maximum concentration of 0.001 mg/kg. The methylene chloride reported
in the soil boring samples was considered to be a laboratory contaminant. Anthracene
and phenanthrene were found in one sediment sample at 0.111 mg/kg and 0.106 mg/kg,
respectively. Organic constituents selected as potential COCs are listed in the human
health risk summary below. Arsenic, barium, cadmium, chromium, copper, lead, silver,
and zinc were the inorganic potential COCs identified in soil boring and sediment
samples at Site 35. At 12 of the soil borings and in both sediment samples, one or more
of these potential inorganic COCs were found at concentrations greater than their
background levels. Lead concentrations greater than background levels were found at
eight of the soil borings and in both sediment samples. .
The one surface water sample was collocated with one of the sediment samples. The
analytical results are summarized in Tables 2-4 and 2-5. Di-n-butyl phthalate was found
in the sample at 1.3 ug/L. Cyanide and zinc were the inorganic potential COCs
identified in the surface water sample.
Surface spills and runoff from Site 35 and areas upstream of the site are the suspected
sources of the organic constituents and potential inorganic COCs detected in the soil
boring, sediment, and/or surface water samples collected from within the drainage ditch
along the southwest side of the site, near the south corner of Building 1054, and near the
grease rack to the southeast of Building 1054. However, lead was not detected in the
surface water sample, and organic constituents were not detected in the downstream
sediment sample collected from within the drainage ditch. The concentration of lead
increased slightly in the downstream direction from sediment sample #1 to #2. Based on
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the distribution of organic constituents and potential inorganic COCs in surface water,
sediment, and soil samples collected from within the drainage ditch, the impact to
sediment and water quality downstream of Site 35 appears to be limited to lead.
A former waste-oil UST is the suspected source of the organic constituents (acetone, PCE,
and carbon disulfide) detected in the soil samples collected from the borings drilled near
the excavation of this former UST, located in the unpaved area between the drainage
ditch and the fence that run along the southwest side of the site. However, the excavation
of a former fuel UST near the northwest end of Building 1054A appears to have removed
the contamination that was associated with it.
Summary of Human Health Risks
Site 35 is an industrial site, and on-site risk was assessed for industrial populations
based on exposure to potential COCs in site soils. Because surface water run-off from
Site 35 may flow to areas to which residential populations have access, risk was also
assessed for residential exposure to potential COCs in surface water. The potential
COCs in soil identified at Site 35 included TPH-G, TPH-D, methylene chloride, acetone,
carbon disulfide, 2-butanone,' tetrachloroethene, anthracene, phenanthrene, arsenic,
barium, cadmium, chromium, copper, lead, silver, and zinc. The potential COCs in
surface water were di-n-butyl phthalate, cyanide, and zinc. The risk assessment indicates
that the potential COCs identified at Site 35 do not present an unacceptable risk to
human health.
2.7.4 Site 46: Acid Pit
Site Description
Site 46, Figure 2-8, is located on the main post adjacent to Site 88. These sites share a
common area between Building 2138H and Building 2140. Site 46 includes paved and
unpaved areas adjacent to the southeast side of Building 2138H, a portion of the concrete
pad that is located at the foot of a concrete ramp on the southeast side of Building
2138H, and the open drainage ditch that runs along the northeast side of Site 46. The
portion of the drainage ditch which lies southeast of Building 2138H is lined with
concrete.
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Batteries brought to Site 46 were drained onto the concrete pad or onto soil adjacent to
the concrete pad. Acid that was drained onto the concrete pad was mixed with sodium
bicarbonate and then washed into the drainage ditch or sanitary sewer. The estimated
amount of battery acid discharged at Site 46 ranges from 150 liters per year to 2,000 liters
per year (HLA, 1993). Waste oil and solvents may also have been released at the site
(HLA, 1993).
Potential sources of contaminants recommended for remedial investigation at Site 46 were
the concrete pad and adjacent soils. Another potential source was a reported spill of
oil/water mixture around the footing of a new drum storage rack under construction in
1995. Potential migration pathways recommended for remedial investigation at the site
include the sanitary sewer, storm drain lines, and the portion of the open drainage ditch
northeast of Building 2140.
Site Characteristics
Soil boring samples were collected at five locations, and sediment samples were collected
at two locations (Figure 2-8).
Twenty-seven soil boring and two sediment samples were collected at Site 46. The
samples were analyzed for TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. The
analytical results are summarized in Tables 2-2 and 2-3 and on Figure 2-8. TPH-G was
detected at one soil boring, at 57 mg/kg. TPH-D was detected at three soil borings and in
both sediment samples, with a maximum concentration of 162 mg/kg. Methylene chloride
was found at two soil borings and in one sediment sample. The methylene chloride
reported in the soil boring and sediment samples was considered to be a laboratory
contaminant. Concentrations of SVOCs were detected at two soil borings and in both
sediment samples. The SVOCs included anthracene, benzo(a)anthracene,
benzo(k)fluoranthene, benzo(g,h,i)perylene, benzo(a)pyrene, bis(2-ethylhexyl)phthalate,
chrysene, diethyl phthalate, di-n-butyl phthalate, fluoranthene, phenanthrene, and
pyrene. The di-n-butyl phthalate reported in the soil boring and sediment samples was
considered to be a laboratory contaminant. Organic constituents selected as potential
COCs are listed in the human health risk summary below.
Arsenic, barium, cadmium, lead, silver, and zinc were the inorganic potential COCs
identified in the soil boring and sediment samples at Site 46. Concentrations greater than
background levels of one or more of these potential inorganic COCs were found at the five
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soil borings and in both sediment samples. Lead concentrations greater than background
levels were found at two soil borings and in both sediment samples. Zinc concentrations
greater than background levels were found at one soil boring and in both sediment
samples.
A storm drain line, damaged while excavating for a footing in the new POL storage area,
is the suspected source of the TPH-G and TPH-D reported in the samples from borings
#4 and #5. The line was repaired, and impacted soil was excavated and removed from
Site 46 at the time the POL storage area was completed (DPW, 1996). The limited extent
of the petroleum hydrocarbons detected in soil samples collected from within and near
the footing excavation where the line was damaged suggests that the impact of the release
from the line was not significant.
Surface spills and runoff are the suspected sources of the TPH-D, lead, zinc, and SVOCs
detected in the other soil boring and sediment samples collected at Site 46. The
distribution of the arsenic, barium, cadmium, silver, and zinc detected in the soil and
sediment samples suggests that they are naturally occurring.
Based on the concentrations of potential COCs in soil boring and sediment samples
collected from within the drainage ditch at Site 46, it appears that sediment quality
downstream of sediment sample #2 may be impacted by site activities. However, the
lack of complete characterization in the drainage ditch is not considered a concern. The
area where sediment sample #2 was collected can reasonably be assumed to be more
significantly impacted by site activities than areas further downstream. Because the risk
assessment concluded that the concentrations of potential COCs detected at the site
(including those in sediment sample #2) do not pose a significant health risk, lower
concentrations of potential COCs that may extend beyond sediment sample #2 are not
thought to pose a significant risk either.
The data do not suggest that the past disposal of battery acid has significantly impacted
soil or sediment at Site 46.
Summary of Human Health Risks
Site 46 is an industrial site, and on-site risk was assessed for industrial populations
based on exposure to potential COCs in site soils. The potential COCs at Site 46
included phenanthrene, anthracene, fluoranthene, pyrene, chrysene, benzo(a)anthracene,
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bis(2-ethylhexyl)phthalate, benzo(k)fluoranthene, benzo(a)pyrene, benzo(g,h,i)perylene,
diethyl phthalate, arsenic, barium, cadmium, lead, silver, and zinc. The risk assessment
indicates that the potential COCs identified at Site 46 do not present an unacceptable
risk to human health.
2.7.5 Site 57: Pits (1942)
Site Description
Site 57, Figure 2-9, includes three limited areas that straddle the portion of the East Range
access road situated to the north of Building 6027. Building 6027 is located near the
intersection of the East Range access road and Santos-DuMont street. Aerial
photographs of the site covering the years 1942 to 1985 indicated that four pits were
located at the site in 1942. The pits were only observed in the 1942 photograph. The site
remained undeveloped (IMS, 1993).
No evidence of hazardous waste disposal at the site was found searching historical
records and interviews with personnel. A field investigation conducted during the PA of
the area detected petroleum hydrocarbons, toluene, and methylene chloride in soil gas
(IMS, 1994). Potential sources of contaminants recommended for further remedial
investigation were five locations where petroleum hydrocarbons, toluene, and methylene
chloride were found during the previous investigations.
Site Characteristics
Fourteen soil boring samples were collected from five locations at Site 57 (Figure 2-9). The
samples were analyzed for TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. The
analytical results are summarized in Tables 2-2 and 2-3 and on Figure 2-9. TPH-G was
detected at one soil boring, at 15 mg/kg. TPH-D, VOCs, and SVOCs were not detected
in the soil borings samples collected at the site. No organic constituents were selected as
potential COCs. Barium, cobalt, and copper were the inorganic potential COCs
identified in the soil boring samples at Site 57. Barium and cobalt concentrations greater
than background levels were found at one soil boring. Copper concentrations greater than
background levels were found at three soil borings.
TPH-G and inorganic analytes found above background levels at Site 57 appear to be
limited to two areas: the embankment below the north edge of the East Range access road
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and the portion of the access roadway within the suspected area of the pits. Vehicular
traffic that uses the access road is suspected to be the source of the TPH-G found in the
shallow soil sample collected from the embankment below the north edge of the road.
Based on their distribution at the site, barium, cobalt, and copper appear to be naturally
occurring.
Summary of Human Health Risks
Site 57 is an industrial site, and on-site risk was assessed for industrial populations
based on exposure to potential COCs in site soils. The potential COCs at Site 57
included barium, cobalt, and copper. The risk assessment indicates that the potential
COCs identified at Site 57 do not present an unacceptable risk to human health.
2.7.6 Site 59: Two Trenches (1942)
Site Description
Site 59, Figure 2-10, is located at the Leilehua Golf Course on the East Range. Two
trenches were located at the site in 1942 (IMS, 1993). The trench at 59A was located on
the north side of the golf course, near Santos-DuMont street. The other trench at 59B was
located within the middle of the golf course north of the clubhouse.
Searches of historical records and interviews with personnel did not find evidence of
hazardous material disposal at the site. An field investigation conducted during the PA
of the trenches detected petroleum hydrocarbons and toluene in the subsurface. These
locations became suspected sources, and further remedial investigation was recommended
at both locations (IMS, 1994).
Site Characteristics
Ten soil boring samples were collected from two locations at Site 59 (Figure 2-10). The
samples were analyzed for TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. The
analytical results are summarized in Tables 2-2 and 2-3 and on Figure 2-10. TPH-G,
TPH-D, VOCs, and SVOCs were not detected in the soil borings samples collected at the
site. Antimony, arsenic, barium, cobalt, and copper were the inorganic potential COCs
identified in the soil boring samples at Site 59. Antimony, barium, cobalt, and copper
concentrations greater than background levels were found at one soil boring. An arsenic
concentration greater than background was found at the second soil boring.
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The investigation at Site 59 did not detect the petroleum hydrocarbons that had been
suggested by the PA SGS in 1993 (TEG-H/IMS, 1993). The presence of inorganic
potential COCs at the site appears to be limited to antimony, arsenic, barium, cobalt, and
copper. Based on their presence at a golf course and their erratic distribution within the
subsurface, these analytes appear to be naturally occurring.
Summary of Human Health Risks -
Site 59 is an industrial site, and on-site risk was assessed for industrial populations
based on exposure to potential COCs in site soils. The potential COCs at Site 59
included antimony, arsenic, barium, cobalt, and copper. The risk assessment indicates
that the potential COCs identified at Site 59 do not present an unacceptable risk to
human health.
2.7.7 Site 61: Pits and Trenches (1953 -1977)
Site Description
Site 61, Figure 2-11, is located south of the East Range access road. Several pits and
trenches were reported to have existed at the site from 1953 to 1977 (IMS, 1994). The
held investigation conducted during the PA detected petroleum hydrocarbons in
subsurface (TEG-H/IMS, 1993). Therefore, further remedial investigation was
recommended at Site 61.
Site Characteristics
Seventeen soil boring samples were collected from five locations at Site 61 (Figure 2-11).
The samples were analyzed for TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide.
The analytical results are summarized in Tables 2-2 and 2-3 and on Figure 2-11. TPH-G,
TPH-D, and VOCs were not detected in the soil borings samples collected at the site. Di-
n-butyl phthalate was found at one soil boring, at 0.014 mg/kg. The di-n-butyl phthalate
reported in the soil boring sample was considered to be a laboratory contaminant.
Chromium, copper, and mercury were the inorganic potential COCs identified in the soil
boring samples at Site 61. A concentration of chromium above background was found at
one soil boring, and a concentration of mercury above background was found at another
soil boring. Concentrations of copper greater than background levels were found at four
soil borings.
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The investigation at Site 61 did not detect the petroleum hydrocarbons suggested by the
PA SGS in 1993 (TEG/IMS, 1993). The presence of potential COCs at the site appears to
be limited to chromium, copper, and mercury. Based on their distribution within the
subsurface, it appears that these analytes are naturally occurring at the site.
Summary of Human Health Risks
Site 61 is an industrial site, and on-site risk was assessed for industrial populations
based on exposure to potential COCs in site soils. The potential COCs at Site 61
included chromium, copper, and mercury. The risk assessment indicates that the
potential COCs identified at Site 61 do not present an unacceptable risk to human health.
2.7.8 Site 63: Pits (1962)
Site Description
Site 63, Figure 2-12, is also located south of the East Range access road. Three pits were
reported to have existed at the site in 1962 (IMS, 1994). The field investigation
conducted during the PA detected petroleum hydrocarbons in subsurface soil gas (TEG-
H/IMS, 1993). Therefore, further remedial investigation was recommended at Site 63.
Site Characteristics
Twenty-three soil boring samples were collected from six locations at Site 63 (Figure 2-
12). The samples were analyzed for TPH-G, TPH-D, VOCs, SVOCs, and metals and
cyanide. The analytical results are summarized in Tables 2-2 and 2-3 and on Figure 2-12.
TPH-G, VOCs, and SVOCs were not detected in any of the soil boring samples collected
at the site. TPH-D was found at one soil boring, at 11 mg/kg. TPH-D was not selected
as a potential COC. Copper and mercury were the inorganic potential COCs identified in
the soil boring samples at Site 63. Concentrations of copper above background levels
were found at each of the six soil borings. Concentrations of mercury above background
levels were found at two soil borings.
The investigation at Site 63 confirmed the presence of petroleum hydrocarbons as had
been suggested by the PA SGS in 1993 (TEG-H/IMS, 1993). Although the source of the
TPH-D is unknown, vehicular traffic on the nearby side roads to the East Range access
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road is the suspected source, rather than the pits that were the subject of the investigation
of Site 63.
The presence of inorganic potential COCs at the site appears to be limited to copper and
mercury. Based on the distribution of copper and mercury concentrations detected at the
site, these analytes appear to be naturally occurring.
Summary of Human Health Risks - .
Site 63 is an industrial site, and on-site risk was assessed for industrial populations
based on exposure to potential COCs in site soils. The potential COCs at Site 63
included copper and mercury. Based on the risk assessment, the potential COCs
identified at Site 63 do not present an unacceptable risk to human health.
2.7.9 Site 646: Pits (1962)
Site Description
Site 64B, Figure 2-13, is also located south of the East Range access road. Two pits were
reported to have existed at the site in 1962 (IMS, 1994). The held investigation
conducted during the PA detected petroleum hydrocarbons in subsurface soil gas (TEG-
H/IMS, 1993). Therefore, further remedial investigation was recommended at Site 64B.
Site Characteristics
Eight soil boring samples were collected from three locations at Site 64B (Figure 2-13).
The samples were analyzed for TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide.
The analytical results are summarized in Tables 2-2 and 2-3 and on Figure 2-13. TPH-G
was not detected in any of the soil boring samples collected at the site. TPH-D was
found at one soil boring, with a maximum concentration of 512 mg/kg. Toluene was
found at one soil boring, with a maximum concentration of 0.024 mg/kg. Di-n-butyl
phthalate was found at one soil boring, at 0.00652 mg/kg. The di-n-butyl phthalate
reported in the soil boring sample was considered to be a laboratory contaminant.
Organic constituents selected as potential COCs are listed in the human health risk
summary below. Copper and mercury were the inorganic potential COCs identified in the
soil boring samples at Site 64B. Concentrations of copper above background levels were
found at two soil borings. A concentration of mercury above background was found at
one soil boring.
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The results of the investigation at Site 64B confirmed the presence of petroleum
hydrocarbons as suggested by the PA SGS in 1993 (TEG-H/IMS, 1993). However, the
source of the TPH-D and toluene is not known, and they appear limited in extent.
Vehicular traffic on the nearby unpaved East Range access road is the suspected source of
the TPH-D and toluene detected in the soil boring samples collected at the site. The
access road is used extensively by U.S. Army vehicles in support of training exercises
conducted in the East Range. ,/,.,.-.
The presence of inorganic potential COCs at the site appears to be limited to copper and
mercury. The distribution of these analytes within the subsurface suggests that they are
naturally occurring at Site 64B.
Summary of Human Health Risks
Site 64B is an industrial site, and on-site risk was assessed for industrial populations
based on exposure to potential COCs in site soils. The potential COCs at Site 64B
included toluene, copper, and mercury. The risk assessment indicates that the potential
COCs identified at Site 64B do not present an unacceptable risk to human health.
2.7.10 Site72B: Maintenance Area, Building 368
Site Description
Site 72B, Figure 2-14, is located adjacent to and east of Site 21. Facilities included in Site
72B include Buildings 368, 368A, 368C, 369, 369B, and 369C; a hazardous materials
storage area south of Building 368; a Petroleum, Oil, and Lubricants (POL) drum storage
shed attached to Building 368B; and a wash rack east of Building 368. Four USTs are
used within the site. Some areas around the buildings area are paved with asphalt.
Vehicle and equipment maintenance and repair has been performed continuously at the
location since the 1940s (IMS, 1994). POL, waste oil, and diesel have been used or stored
at the site. No spills or leaks were reported for the site.
Potential sources of contamination were identified during preliminary assessments and
reconnaissance of the site. Those potential sources recommended for further remedial
investigation are listed below.
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Building 369B and its attached drum storage shed
Unpaved areas surrounding Buildings 368 and 369B, excluding the area west
of Building 368 that was included in Site 21
The wash rack and associated water supply shed 368C east of Building 368
The location of a former UST north of Building 368
' A large oil-stained area north of the service bays located inside Building 368
The area surrounding two existing waste oil USTs south of Building 368
The site's vehicle and heavy equipment parking area along the eastern portion
of the site
Site Characteristics
SGS samples were collected at 11 locations, and soil boring samples were collected from
15 locations at Site 72B (Figure 2-14).
Twelve SGS samples were collected from the 11 sampling locations. Concentrations of
TVH and aromatic VOCs related to fuel products (ethyl benzene and total xylenes) and
solvents (methylene chloride, PCE, and TCE) were detected in a number of the SGS
samples, ranging from 0.021 ppmv to 32 ppmv. The highest concentration of TVH was
found near the south end of Building 369B.
Thirty soil boring samples were collected at Site 72B. The samples were analyzed for
TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. The analytical results are
summarized in Tables 2-2 and 2-3 and on Figure 2-14. TPH-G was detected at one soil
boring, at 132 mg/kg. TPH-D was detected at four soil borings, with a maximum
concentration of 253 mg/kg. Concentrations of VOCs were detected at 12 soil borings,
ranging from 0.00045 mg/kg to 5.9 mg/kg. Detected VOC constituents included
methylene chloride, PCE, TCE, 1,1,2,2-terrachlroethane, toluene, 1,1,2-trichlorethane, and
total xylenes. The methylene chloride and toluene reported in the soil boring samples
were considered to be laboratory contaminants. Concentrations of SVOCs were detected
at four soil borings, ranging from 0.0114 mg/kg to 0.0296 mg/kg. Detected SVOC
constituents included bis(2-ethylhexyl) phthalate and di-n-butyl phthalate. The bis(2-
ethylhexyl) phthalate and di-n-butyl phthalate reported in the soil boring samples were
considered to be laboratory contaminants. Organic constituents selected as potential
COCs are listed in the human health risk summary below. Barium and lead were the
inorganic potential COCs identified in the soil boring samples at Site 72B. Concentrations
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of barium above background levels were found at three soil borings. Concentrations of
lead above background levels were also found at three soil borings.
The investigation of Site 72B appears to confirm that storage and use of fuels, POLs,
waste oil, solvents, and hazardous materials at the site has introduced organic
constituents and lead into the subsurface. With the exception of boring #2, surface spills
and runoff are the suspected sources of the organic analytes and lead detected in the soil
samples collected at Site 72B. The existing waste-oil USTs are the suspected source of
the TPH-D found in a sample from boring #2, drilled near the location of these tanks.
Although it is possible that a former UST is the source of the TCE found in a boring
drilled near the location of the former tank, the similarity of TCE concentrations detected
in this boring to TCE concentrations in samples from borings that were drilled in areas
away from the former UST suggests that the TCE is also the result of surface spills and
runoff.
The distribution of barium detected in shallow soil samples collected from the borings
drilled at Site 72B suggests that it is naturally occurring at the site.
The data do not suggest that the wash rack and its associated pressurized water supply
shed, the site's vehicle and heavy equipment parking area, or the overhead tank have
significantly impacted soil at Site 72B.
Summary of Human Health Risks
Site 72B is currently an industrial site, but future plans call for the construction of
barracks at this site. Therefore, on-site risk was assessed for both residential and
industrial populations based on exposure to potential COCs in site soils. The potential
COCs at Site 72B included trichloroethene, tetrachloroethene, 1,1,2,2-tetrachloroethane,
total xylenes, barium, and lead. The risk assessment indicates that the potential COCs
identified at Site 72B do not present an unacceptable risk to human health.
2.7.11 Site 73: Motor Pool (1942)
Site Description
Site 73, Figure 2-15, is located on the Main Post and includes the former locations of three
demolished buildings that were part of a motor pool and vehicle maintenance area from
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approximately 1942 to 1950 (IMS, 1994). The site now includes paved and unpaved
areas where the former buildings were located and an unlined drainage ditch that runs
along the south side of Kolekole Avenue.
A search of historical records and interviews with SB personnel indicated that waste oil,
solvents, and wastewater from wash racks were routinely discharged into storm drainage
ditches during the 1940s and 1950s at most of the SB maintenance locations (IMS, 1993).
Therefore, it is assumed that this practice occurred at Site 73 while the facilities were in
operation. However, a site reconnaissance conducted during the preliminary assessment
did not locate any visible signs of contamination (IMS, 1993).
The U.S. Army agreed to further investigate the unlined storm ditch at the site after
consultation with U.S. EPA.
Site Characteristics
SGS samples were collected at 17 locations, and soil boring samples were collected from
one location at Site 73B (Figure 2-15).
Twenty three SGS samples were collected from the 17 sampling locations. Concentrations
of TVH and aromatic VOCs related to fuel products (ethyl benzene, toluene, and total
xylenes) were detected in a number of the SGS samples, ranging from 0.025 ppmv to 45
ppmv. The highest concentration of TVH was found to the east of Building 2091, near the
entry to the site's parking area.
Six soil boring samples were collected at Site 73. The samples were analyzed for TPH-G,
TPH-D, VOCs, SVOCs, and metals and cyanide. The analytical results are summarized
in Tables 2-2 and 2-3 and on Hgure 2-15. TPH-G, TPH-D, VOCs, and SVOCs were not
detected in any of the soil boring samples collected at the site. Arsenic, barium, and
copper were the inorganic potential COCs identified in the soil samples collected from the
one soil boring at Site 73.
The SGS results at Site 73 do not support the presence of the potential contaminants
discussed in the PA (IMS, 1993). The VOCs that were detected in most of the SGS
samples appear to be caused by vehicular traffic in the site's parking area and along
Kolekole Avenue, as well as by runoff from these areas. The source of the VOCs detected
in the SGS samples collected from the area of the golf course is not known.
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No organic constituents were detected in the soil boring samples collected at Site 73. This
is consistent with the lack of correlation between low-level SGS concentrations and
detected organic compounds in soil samples observed at other OU 3 sites.
The presence of inorganic potential COCs at the site is limited to arsenic, barium, and
copper. The distribution of these analytes within the site's subsurface suggests that they
are naturally occurring.
Summary of Human Health Risks
Site 73 is an industrial site, and on-site risk was assessed for industrial populations
based on exposure to potential COCs in site soils. The potential COCs at Site 73
included arsenic, barium, and copper. Based on the risk assessment, the potential COCs
identified at Site 73 do not present an unacceptable risk to human health.
2.7.12 Site 74: Open Storage (1977)
Site Description
Site 74, Figure 2-16, is located on the Main Post. The site includes Building 3004 and the
portion of the Waikele Stream ravine and stream bed that is situated to the south of
Building 3004. Open storage of unspecified materials was observed at the site in 1977
(IMS, 1994), and two empty rusty drums marked "fog oil" were observed during a site
reconnaissance as part of a preliminary assessment (IMS, 1993). Therefore, the PA
recommended further remedial investigation in the ravine (IMS, 1994).
Site Characteristics
One SGS sample was collected at each of four locations at Site 74 (Figure 2-16).
Concentrations of TVH were detected in three of the SGS samples, ranging from 2.3 ppmv
to 4 ppmv. The highest concentration of TVH was found at the most downstream of the
locations within the Waikele Stream Ravine.
The results of the SGS at Site 74 indicate that the potential contamination identified in the
IMS PA (IMS, 1993) is not present at the site. The source of the TVH that was detected
at the site is not known. Discussions with personnel from the contractor that conducted
the SGS indicate that the TVH may be methane generated by decaying organic matter.
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Summary of Human Health Risks
Site 74 is an industrial site. No potential COCs were identified at this site. Therefore,
this site does not present a risk to human health or the environment.
2.7.13 Site 80: Possible Trench (1953)
Site Description
Site 80, Rgure 2-17, is a rectangular area adjacent to Moyer Street and Building 4112.
Preliminary assessment of the site (IMS, 1993) revealed that it was part of a maintenance
area from 1942 to 1958 and that a trench was observed at the site in 1953. However, no
record of hazardous waste disposal into the trench was found during the PA. An SGS
conducted as part of the PA (TEG-H/IMS, 1993) detected TPH concentrations at five
locations scattered throughout Site 80. Further remedial investigation was recommended
for these five locations.
Site Characteristics
Twelve soil boring samples were collected from two locations at Site 80 (Figure 2-17). The
samples were analyzed for TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. The
analytical results are summarized in Tables 2-2 and 2-3 and on Figure 2-17. TPH-G,
TPH-D, and SVOCs were not detected in the soil borings samples collected at the site.
Concentrations of methylene chloride were found at both soil borings, with a maximum
concentration of 0.0018 mg/kg. The methylene chloride reported in the soil boring
samples was considered to be a laboratory contaminant. Barium, copper, and lead were
the inorganic potential COCs identified in the soil boring samples at Site 80.
Concentrations of barium greater than background levels were found at both soil borings.
Concentrations of copper greater than background levels were found at one soil boring. A
lead concentration greater than background was found at one soil boring.
The investigation at Site 80 did not detect the petroleum hydrocarbons that had been
suggested by the PA SGS in 1993 (TEG/IMS, 1993). The presence of inorganic potential
COCs at the site appears limited to barium, copper, and lead. Except for the lead found
in the surface sample from boring #1, the distribution of the these analytes within the
subsurface suggests that they occur naturally at Site 80. Surface runoff from nearby
Moyer Street is a suspected source of the lead detected in the surface sample from boring
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#1. Other suspected sources of the lead include past construction practices and/or
renovation of the nearby residential housing.
Summary of Human Health Risks
Site 80 is a residential site, and on-site risk was assessed for residential populations
based on exposure to potential COCs in site soils. The potential COCs at Site 80
included barium, copper, and lead. Based on the risk assessment, the potential COCs
identified at Site 80 do not present an unacceptable risk to human health.
2.7.14 Site 81B: Industrial Operation, Light-Toned Material, Open
Storage, and Dark Stains (1942)
Site Description
Site 81B, Figure 2-18, includes paved areas surrounding Buildings 754C and 758, as well
as a drainage ditch that runs along the southeast side of the site, adjacent to Burner Road.
A search of SB records, aerial photographs, and interviews with military personnel
conducted during the PA (EMS, 1993) indicate that a maintenance and repair facility
occupied the site from the early 1950s to mid 1970s. The PA also indicated that
washrack wastewater, which may have contained oil and solvents, was routinely
discharged into storm drainage ditches at most SB maintenance sites. Therefore, similar
disposal activities may have taken place at Site 81B (EMS, 1994). However, the exact
location of past wastewater releases at the site, if any occurred, is unknown. The records
search and site visit conducted by EMS did not reveal evidence of contamination at the
site. After discussions with the U.S. EPA, the U.S. Army also agreed to evaluate the
sewer system/storm drain (SS/SD) lines at Site 81B as possible sources of COCs.
Site Characteristics
SGS samples were collected at eight locations, and soil boring samples were collected
from two locations at Site 81B (Figure 2-18).
One SGS sample was collected from each of the eight sampling locations. Concentrations
of TVH and aromatic VOCs related to fuel products (ethyl benzene, toluene, and total
xylenes) were detected in a number of the SGS samples, ranging from 0.028 ppmv to 16
ppmv. The highest concentration of TVH was found to the southeast of Building 754C
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Nine soil boring samples were collected at Site 81B. The samples were analyzed for
TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. The analytical results are
summarized in Tables 2-2 and 2-3 and on Figure 2-18. TPH-G, TPH-D, and VOCs were
not detected in any of the soil boring samples collected at the site. Bis(2-ethylhexyl)
phthalate was found at one soil boring, at 0.0158 mg/kg. The bis(2-ethylhexyl) phthalate
reported in the soil boring sample was considered to be a laboratory contaminant.
Barium, chromium, cobalt, copper, nickel, and thallium were the inorganic potential COCs
identified in the soil samples collected at Site 81B. Concentrations of barium, chromium,
and nickel greater than background levels were found at both borings. Concentrations of
copper greater than background were found at one boring. A concentration of thallium
greater than background was found at one boring.
Analysis of the soil samples collected at the site did not confirm the presence of the
VOCs suggested by the SGS data. Organic constituents associated with the possible
releases of waste oil, solvents, and wastewater discussed in the Field Screening Sampling
and Analysis Plan (FSSAP) (IMS, 1994) were not detected in the soil samples.
The inorganic potential COCs at Site 81B appear limited to barium, chromium, cobalt,
copper, nickel, and thallium. However, their distribution within the subsurface suggests
that they occur naturally and are not contaminants.
Summary of Human Health Risks
Site 816 is an industrial site, and on-site risk was assessed for industrial populations
based on exposure to potential COCs in site soils. The potential COCs at Site 81B
included barium, cobalt, and copper. Thallium was originally included as a COC because
a single sample collected at a depth of 9.5 feet passed the screening criteria. However,
exposure to soils at this depth is unlikely. Therefore, thallium was removed as a COC at
Site 81 B. Nickel was originally included as a COC based on two samples collected at
depths of 10 feet or greater. All other nickel concentrations were within the range of
naturally occurring concentrations reported in the soil quality literature for Oahu. In
addition, exposure to soils at this depth is unlikely; therefore, nickel was also removed as
a COC at Site 81B. Based on the risk assessment, the potential COCs identified at Site
81B do not present an unacceptable risk to human health.
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2.7.15 Site 83: Open Storage/Motor Pool Area (1950 -1970)
Site Description
Site 83, Rgure 2-19, is occupied by five warehouses and a battery storage and
maintenance shed. Site 83 is bordered by Site H on the northeast. A search of SB records
conducted during the IMS PA (1993) indicated that warehouses and maintenance and
repair facilities occupied the site from 1950 to 1970. An interview with SB personnel
conducted during the PA indicated that wastewater from vehicle steam cleaning may
have been discharged directly onto the ground at the site in the past. The wastewater
may have contained oil and solvents, and could have flowed into the drainage ditch along
McMahon Road. However, the exact location at the site where past steam cleaning
operations may have discharged wastewater is unknown.
The locations where discharges of wastewater likely occurred were recommended for
further remedial investigation (IMS, 1994). In addition, sanitary sewer and storm drain
lines were recommended for further remedial investigation.
Site Characteristics
SGS samples were collected at seven locations, and soil boring samples were collected
from one location at Site 83 (Figure 2-19).
Ten SGS samples were collected from the seven sampling locations. Concentrations of
TVH were detected in a number of the SGS samples, ranging from 1.1 ppmv to 4.2 ppmv.
The highest concentration of TVH was found near the east corner of the site.
Four soil boring samples were collected at Site 83. The samples were analyzed for
TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. The analytical results are
summarized in Tables 2-2 and 2-3 and on Figure 2-19. TPH-G, TPH-D, VCCs, and
SVOCs were not detected in any of the soil boring samples collected at the site. No
inorganic potential COCs were identified in the soil samples collected at Site 83.
The source of the TVH detected in the SGS samples is not known. However, the TVH at
Site 83 may be methane generated from decaying organic matter.
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The results of the investigation at Site 83 indicate that the site and the drainage ditch in
the north comer of the site were not significantly contaminated by the steam cleaning
reported by IMS (1994).
Summary of Human Health Risks
Site 83 is an industrial site. No potential COCs were identified at this site. Therefore,
this site does not present a risk to human health or the environment.
2.7.16 Site 88: Motor Pool (1955 -1978)
Site Description
Site 88, Figure 2-20, has operated as a maintenance facility since 1950. Drums of
hazardous waste and POL were stored on a paved area northeast of Building 2140. Fuel
was stored in a 12,000-gallon UST outside the site's main gate from 1946 to 1991.
However, the tanks and impacted soil were removed in 1991 (Rubeck Engineering, 1992).
Wastewater generated from vehicle steam cleaning was discharged to drainage ditches
adjacent to the site (IMS, 1994).
Potential sources of contaminants at the site were identified for further remedial
investigation (IMS, 1994). These included the drainage ditch near the site's entrance from
Lyman Road on the southeast side, the drainage ditch near the east corner of the site, the
oil/water separator and drum storage area northeast of Building 2140, and the paved
areas near the site's entrance and west and southwest of Building 2138. In addition, the
sanitary sewer and storm drain lines were identified as potential sources that required
further remedial investigation.
Site Characteristics
SGS samples were collected at four locations and soil boring samples were collected from
two locations at Site 88 (Figure 2-20).
Five SGS samples were collected from the four sampling locations. Concentrations of
TVH and/or other VOCs were not detected in any of the SGS samples collected at the
site.
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Eleven soil boring samples were collected at Site 88. The samples were analyzed for
TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. The analytical results are
summarized in Tables 2-2 and 2-3 and on Figure 2-20. TPH-G and TPH-D were not
detected in any of the soil boring samples collected at the site. Methylene chloride was
found at two soil borings, with a maximum concentration of 0.0022 mg/kg. The
methylene chloride reported in the soil boring samples was considered to be a laboratory
contaminant. Diethyl phthalate was found at one soil boring, at 0.00246 mg/kg. Di-n-
butyl phthalate was found at one soil boring, at 0.249 mg/kg. Di-n-butyl phthalate was
also found in other samples from two soil borings. The di-n-butyl phthalate in these
samples was considered to be a laboratory contaminant. Organic constituents selected as
potential COCs are listed in the human health risk summary below. Barium and copper
were the inorganic potential COCs identified in the soil samples collected at Site 88.
Concentrations of barium greater than background levels were found at two borings.
Concentrations of copper greater than background were found at one boring.
The investigation at Site 88 did not find potential contaminants in the drainage ditches or
in the areas in which vehicles may have been steam cleaned in the past.
The source of the inorganic potential COCs at Site 88 is not known, but their distribution
and consistent concentrations suggest that they are naturally occurring at Site 88.
Summary of Human Health Risks
Site 88 is an industrial site, and on-site risk was assessed for industrial populations
based on exposure to potential COCs in site soils. The potential COCs at Site 88
included diethyl phthalate, di-n-butyl phthalate, barium, and copper. The risk
assessment indicated that the potential COCs identified at Site 88 do not present an
unacceptable risk to human health.
2.7.17 Site 90: Motor Pool (1959 -1969), and Dark Stains (1970)
Site Description
Site 90, Figure 2-21, is an irregularly-shaped site situated near the intersection of
Hendrickson Street and Mokihana Loop. Site 90 was occupied by a motor pool from
about 1950 to 1969 (IMS, 1993). An aerial photograph taken in 1970 showed a large
stain to the northeast of the water storage tank that is located in the southwest comer of
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the site. However, no evidence of releases of hazardous materials at the site was found
during the IMS PA, and the cause of the stain is unknown.
Because the site was previously used as a motor pool, the stain may have been caused by
activities associated with the fueling and/or maintenance of vehicles. Therefore, further
remedial investigation was recommended for the area of the stain (IMS, 1994).
Site Characteristics
SGS samples were collected at four locations, and soil boring samples were collected from
two locations at Site 90 (Figure 2-21).
Five SGS samples were collected from the four sampling locations. Concentrations of
TVH and aromatic VOCs related to fuel products (ethyl benzene, toluene, and total
xylenes) were detected in a number of the SGS samples, ranging from 0.047 ppmv to 11.2
ppmv. The highest concentration of TVH was found near the northeast corner of Building
4544.
Nine soil boring samples were collected at Site 90. The samples were analyzed for
TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. The analytical results are
summarized in Tables 2-2 and 2-3 and on Figure 2-21. TPH-G, TPH-D, and VOCs were
not detected in any of the soil boring samples collected at the site. Di-n-butyl phthalate
was found at one soil boring, at 0.00268 mg/kg. The di-n-butyl phthalate reported in the
soil boring sample was considered to be a laboratory contaminant. Barium, cobalt, and
vanadium were the inorganic potential COCs identified in the soil samples collected at
Site 90. Concentrations of barium greater than background levels were found at both
borings. A concentration of copper greater than background was found at one boring. A
concentration of vanadium greater than background was found at one boring.
The investigation at Site 90 did not detect organic constituents in the area of the soil stain
documented in a 1970 aerial photograph of the site (HLA, 1993a).
The presence of inorganic potential COCs at the site appears limited to barium, copper,
and vanadium. The distribution of these analytes within the subsurface suggests that
they are naturally occurring at Site 90.
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Summary of Human Health Risks
Site 90 is a residential site, and on-site risk was assessed for residential populations
based on exposure to potential COCs in site soils. The potential COCs at Site 90
included barium, copper, and vanadium. The risk assessment indicated that the potential
COCs identified at Site 90 do not present an unacceptable risk to human health.
2.7.18 Site 93: Open Fire (1951) and Open Storage/Light Material/Dark
Stains (1955)
Site Description
Site 93, Figure 2-22, is an irregularly-shaped site situated between McCornack Road and
Trimble Road. Site 93 was open land from 1950 to 1959 (IMS, 1993). An aerial
photograph taken in 1955 showed that the site was possibly associated with a former
maintenance facility, located on the north side of McComack Road, and that a large stain
was present in the eastern part of Site 93. However, no evidence of releases of hazardous
materials at the site was found during the IMS PA, and the cause of the stain is unknown.
Because the site may have been associated with the former maintenance facility, the stain
may have been caused by a spill of POL or by activities associated with vehicle
maintenance. Therefore, further remedial investigation (discussed below) was
recommended for the area of the stain (IMS, 1994).
Site Characteristics
SGS samples were collected at three locations, and soil boring samples were collected
from one location at Site 93 (Figure 2-22).
One SGS sample was collected from the each of the three sampling locations. A
concentration of toluene was detected in one of the SGS samples, at 0.030 ppmv. The
toluene was found near the northeast end of Building 4317.
Six soil boring samples were collected at Site 93. The samples were analyzed for TPH-G,
TPH-D, VOCs, SVOCs, and metals and cyanide. The analytical results are summarized
in Tables 2-2 and 2-3 and on Figure 2-22. TPH-G, TPH-D, VOCs, and SVOCs were not
detected in any of the soil boring samples collected at the site. Arsenic, barium,
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chromium, copper, mercury, and vanadium were the inorganic potential COCs identified
in the soil samples collected from the one soil boring at Site 93.
The investigation at Site 93 did not detect organic contaminants in the area of the soil
stain documented in a 1955 aerial photograph of the site (HLA, 1993a).
The presence of inorganic potential COCs at the site appears limited to arsenic, barium,
chromium, copper, mercury, and vanadium. The distribution of these analytes within the
subsurface suggests that they are naturally occurring at Site 93.
Summary of Human Health Risks
Site 93 is a residential site, and on-site risk was assessed for residential populations
based on exposure to potential COCs in site soils. The potential COCs at Site 93
included arsenic, barium, copper, mercury, and vanadium. Chromium was originally
included as a potential COC because a single sample collected at a depth of 10 feet
exceeded the screening criteria. Other reported chromium concentrations were detected
below local background values. In addition, exposure to soils at this depth is unlikely;
therefore, chromium was removed as a COC at Site 93. The risk assessment indicated
that the potential COCs identified at Site 93 do not present an unacceptable risk to
human health.
2.7.19 Site B: Maintenance Area, Building 940
Site Description
Site B, Rgure 2-23, borders Site D on the southeast. Since the early 1960s, the site has
been used for vehicle and armament maintenance and storage. Site B includes a number
of support buildings; POL storage; a hazmat storage area; a concrete-lined wash rack,
with associated weir-type oil skimmer and separate waste-oil UST; a grease rack, with
associated waste-oil UST; and a fueling facility. Two former grease racks located near
the southwest entrance to the site were removed in late 1985 (HLA, 1993).
Two fuel USTs are known to have been installed at the site. The locations of these two
former fuel USTs are unknown, but they are likely to have been at or near the site's fueling
facility, located northwest of Building 940. One of the fuel USTs, a 20,000-gallon diesel
tank that was suspected of leaking, was removed in late 1991. The second fuel UST, a
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20,000-gallon gasoline tank, was removed in 1993 for unknown reasons. Based on gas
chromatography testing conducted prior to removing the diesel UST, TCE was suspected
to be present in the vicinity of the tank. However, the presence of TCE in soil was not
confirmed.
Potential environmental concerns identified by HLA (1993) are based on past and current
uses and storage of POL and hazardous materials, the possibility of leakage from the
former diesel UST and the existing wash rack waste-oil UST, overflow from the wash
rack oil-water separator, and evidence of leakage and/or spills in the POL storage area.
In addition, the existing SS/SD lines at Site B were identified as possible sources of
COCs.
Site Characteristics
At Site B, SGS samples were collected at 43 locations, soil boring samples were collected
from nine locations, and sediment samples were collected from four locations (Figures 2-
23 and 2-24).
Forty-eight SGS samples were collected from the 43 sampling locations. Concentrations
of TVH and/or BTEX were detected in SGS samples from six locations, ranging from
0.023 ppmv 19.7 ppmv. The highest concentrations of TVH were reported in samples
collected from paved areas near the west corner of the site.
Nineteen soil boring and five sediment samples were collected at the site. Analyses
performed on samples included TPH-G, TPH-D, VOCs, and SVOCs, and metals and
cyanide. Analytical results are summarized in Tables 2-2 and 2-3 and in Figures 2-23 and
2-24. TPH-G was detected at one sediment sample location at a concentration of 93
mg/kg. TPH-D was detected in three soil borings and one sediment sample location, with
a maximum concentration of 121 mg/kg found in the sediment sample. VOCs were not
detected in soil boring or sediment samples. Diethyl phthalate, anthracene, butyl benzyl
phthalate, and bis(2-ethylhexyl) phthalate were detected at three soil boring/sediment
sample locations at concentrations up to 0.774 mg/kg. Di-n-buryl phthalate was
reported in one boring; this constituent was considered to be a laboratory contaminant.
Organic constituents selected as potential COCs are listed in the human health risk
summary below. Inorganic constituents identified as potential COCs were detected at 13
soil boring and sediment sample locations at concentrations above background and/or
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naturally occurring levels. The potential COCs included barium, cadmium, chromium,
cobalt, copper, lead, mercury, and zinc.
Potential organic COCs at Site B appear to be limited to three areas: the grease rack UST,
the wash rack UST, and the drainage ditch that borders the site on the northeast. The
grease rack and wash rack waste-oil USTs are suspected to be the sources of the TPH-D
found in the soil boring samples collected at 5 feet bgs. The extent of TPH-D at these
locations appears to be limited to the shallow subsoil on the basis of data from deeper
samples in the associated borings.
Surface spills and runoff are the suspected sources of the TPH-G, TPH-D, anthracene,
bis(2-ethylhexyl)phthalate, butyl benzyl phthalate, and diethyl phthalate found in the
surface, shallow soil, and sediment samples collected in the drainage ditch.
Surface spills and runoff are also suspected to be the sources of the lead concentrations
detected in the surface soil and sediment samples collected from within the drainage
ditch. The erratic distribution of the remaining inorganic potential COCs detected in the
soil boring and sediment samples suggests that they are naturally occurring.
The data do not suggest that the other potential sources identified at Site 6 have
significantly impacted soil or sediment at the site.
Summary of Human Health Risks
Site B is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. The potential COCs at Site B included
diethyl phthalate, anthracene, butyl benzyl phthalate, bis(2-ethylhexyl)phthalate, barium,
cadmium, chromium, cobalt, copper, lead, mercury, and zinc. The risk assessment
indicates that the potential COCs identified at Site B do not present an unacceptable risk
to human health.
2.7.20 SiteC: Maintenance Area, Building 955
Site Description
Site C, Figure 2-25, is a vehicle and armament maintenance and storage area, located
southeast of Site D. Aerial photographs indicate that Site C was occupied by an oval
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race track from 1942 to 1955 and was used for vehicle storage from 1959 to 1985 (HLA,
1993). The current maintenance and storage area was completed in 1985.
A visit to the site during the PA (HLA, 1993) indicated that the oil sump at the
southwest end of Building 955 overflowed during heavy rains. Visible evidence of
overflows from the oil sump at Building 955 was noted during the HLA site visit.
Potential environmental concerns at Site C identified in the PA Report (HLA, 1993) are
based on past and current uses and storage of hazardous materials, overflow of waste oil
from the sump at Building 955, malfunction of the wash rack oil-water separator, and a
lack of documentation that the two waste-oil USTs had been leak tested. After
discussions with the U.S. EPA, the U.S. Army also agreed to evaluate the SS/SD lines at
Site C as possible sources of contamination.
Site Characteristics
SGS samples were collected at 33 locations, soil boring samples were collected from 11
locations, and sediment samples were collected from two locations (Figure 2-25).
Thirty-six SGS samples were collected from the 33 sampling locations. TVH and/or
BTEX were detected at eight SGS sampling locations, at concentrations that ranged from
0.055 to 16.1 ppmv. The concentration of TVH was highest at the paved area near the
south corner of the site.
Twenty-eight soil boring and two sediment samples were collected at the site. Analyses
performed on samples included TPH-G, TPH-D, VOCs, and SVOCs, and metals and
cyanide. Analytical results are summarized in Tables 2-2 and 2-3 and in Figure 2-25.
TPH-G was not detected at soil boring/sediment sample locations. TPH-D was detected
in three soil boring/sediment sample locations, with a maximum concentration of 291
mg/kg found in sediment sample #1. PCE, TCE, and methylene chloride were detected in
five soil borings, with maximum concentrations of 0.00062 mg/kg, 0.00096 mg/kg, and
0.0019 mg/kg, respectively. The methylene chloride is suspected to be a laboratory
contaminant. Bis(2-ethylhexyl) phthalate, di-n-octyl phthalate, and di-n-butyl phthalate
were detected at three soil boring/sediment sample locations at concentrations up to 4.16
mg/kg. Di-n-butyl phthalate is considered to be a laboratory contaminant. Organic
constituents selected as potential COCs are listed in the human health risk summary
below. Inorganic constituents identified as potential COCs were detected at nine soil
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boring and sediment sample locations at concentration above background and/or
naturally occurring levels. The potential COCs included antimony, barium, cadmium,
chromium, cobalt, copper, lead, mercury, and zinc.
Potential organic COCs at Site C appear to be limited to four areas: the grease rack
waste-oil UST; the POL and/or hazardous materials (hazmat) storage west of the wash
rack; the satellite storage point (SSP) near the east corner of the site; and the drainage
ditch at the west comer of the site. The grease rack waste-oil UST and the wash rack are
suspected to be the sources of the TPH-D found in the soil samples collected at 20 feet
and 3.5 feet bgs, respectively. The SSP is the suspected source of the TCE detected in the
sample collected at 3 feet bgs.
Runoff from upstream Site D and /or Site B is the suspected source of the TPH-D,
bis(2-ethylhexyl)phthalate, di-n-octyl phthalate, PCE, and lead found in the surface,
shallow soil, and sediment samples collected in and near the drainage ditch at the west
corner of Site C.
The distribution of the remaining potential COCs detected in the soil boring and sediment
samples collected at Site C suggests that they are naturally occurring. The data also
indicate that the other potential sources of contamination identified at Site C have not
significantly impacted soil or sediment at the site.
Summary of Human Health Risks
Site C is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. The potential COCs at Site C included
methylene chloride, trichloroethene, tetrachloroethene, bis(2-ethylhexyl)phthalate, di-n-
octyl phthalate, antimony, barium, cadmium, chromium, cobalt, copper, lead, mercury,
and zinc. The risk assessment indicated that the potential COCs identified at Site C do
not present an unacceptable risk to human health.
2.7.21 Site D: Maintenance Area, Building 968
Site Description
Site D, Figure 2-26 is situated between Reiley and Wright-Smith Avenues, between Sites B
and C. Site D has been used since 1987 for vehicle and armament maintenance and
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storage (HLA, 1993). According to aerial photographs reviewed during the PA,
residences had been present at the site in 1951, but had been replaced by warehouses by
1960. A temporary grease rack visible in a 1970 aerial photograph may indicate that the
site had by then become a vehicle maintenance area. By 1978, two permanent grease
racks were on site, but there is only one grease rack currently at the site. Building 968 was
in place by 1985.
Potential environmental concerns identified by HLA (1993) are based on past and current
uses and storage of POL and hazardous materials, the possibility of releases from the
grease rack and its waste-oil UST, overflow from the wash rack oil-water separator,
observed evidence of leakage and/or spills in POL and hazmat storage areas, and aerial
photographic evidence of a stain at the former grease rack on the southeast side of
Building 968. After discussions with the U.S. EPA, the U.S. Army also agreed to evaluate
the SS/SD lines at Site D as possible sources of contaminants.
Site Characteristics
At Site D, SGS samples were collected at 37 locations, soil boring samples were collected
from 17 locations, and sediment samples were collected from two locations (Figure 2-26).
Forty-two SGS samples were collected from the 36 sampling locations. Concentrations of
TVH and/or BTEX were detected in SGS samples from nine locations, ranging from 0.036
to 552 ppmv. The highest concentrations of TVH were found in paved areas to the
southwest and east of Building 968.
Forty-three soil boring and two sediment samples were collected at the site. Chemical
analyses of samples included TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide.
Analytical results are summarized in Tables 2-2 and 2-3 and in Figure 2-26. TPH-G was
not detected in soil boring or sediment samples. TPH-D was detected at seven soil
boring/sediment sample locations, with a maximum concentration of 3,750 mg/kg.
Acetone was found at one boring location at a concentration of 0.024 mg/kg. Carbon
disulfide and PCE were each found at one boring location at a concentration of 0.0007
mg/kg and 0.00069 mg/kg, respectively. Methylene chloride was found at six soil
boring/sediment sample locations, with a maximum concentration of 0.0023 mg/kg. The
methylene chloride reported in the samples was suspected to be a laboratory
contaminant. Fluoranthene and benzo(a) pyrene were both detected in two soil borings,
with maximum concentrations of 0.22 mg/kg and 0.2 mg/kg, respectively.
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Concentrations of chrysene (0.1 mg/kg), bis(2-ethylhexyl) phthalate (8 mg/kg), di-n-octyl
phthalate (2 mg/kg), and benzo(g,h,i) perylene (0.3 mg/kg) were found at one sediment
sample location. Di-n-butyl phthalate and bis(2-ethylhexyl) phthalate were found in one
soil boring at 0.0162 mg/kg and 0.0166 mg/kg, respectively. These two constituents
identified in the soil boring were considered to be laboratory contaminants. Organic
constituents selected as potential COCs are listed in the human health risk summary
below. Inorganic constituents identified as potential COCs included antimony, arsenic,
barium, cadmium, chromium, cobalt, lead, silver, thallium, and zinc. Concentrations of
one or more inorganic potential COCs were greater than background and/or naturally
occurring levels in ten soil borings and both sediment samples.
Potential organic COCs at Site D appear to be limited to the paved area near and to the
southeast of Building 968; the paved area to the northwest of Building 977; the drainage
ditch on the southwest side of the site; and the paved area near the east corner of the site.
Data from deeper soil samples in the associated borings indicates that the extent of the
potential organic COCs at these locations is limited to the shallow subsurface. Surface
spills and runoff are the suspected sources of the TPH-D found in the surface and
shallow soil samples collected in these areas.
Runoff from Site D is the suspected source of the potential COCs detected in the
sediment samples collected at Sites D and C. These samples typically contain the highest
concentrations of potential COCs that were found in samples collected in and near the
drainage ditch. The downstream extent of these potential COCs appears limited to
portions of the drainage ditch immediately adjacent to Site C. The upstream extent of
most of these potential COCs appears limited to the southeast of Site D's boring #6.
However, lead and zinc do not extend further upstream and were detected in Site D's
sediment sample #1.
Summary of Human Health Risks
Site D is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. The potential COCs at Site D included TPH-
D, methylene chloride, acetone, carbon disulfide, tetrachloroethene, fluoranthene,
chrysene, bis(2-ethylhexyl)phthalate, di-n-octyl phthalate, benzo(a)pyrene,
benzo(g,h,i)perylene, antimony, arsenic, barium, cadmium, chromium, cobalt, lead, silver,
thallium, and zinc. The risk assessment indicated that the potential COCs identified at
Site D do not present an unacceptable risk to human health.
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2.7.22 SiteE: Maintenance Area, Building 986
Site Description
Site E, Figure 2-27, is a vehicle and armament maintenance and storage area that is
located on Capron Avenue. Sites C and D are located to the northeast of Site E, across
Reiley avenue. The structures presently on the site were reportedly built in 1970 (HLA,
1993). According to SB records, Motor Pool No. 6 occupied the site as early as 1960, and
warehouses may have occupied the site prior to 1960. Three wash racks and one grease
rack were removed from the site in 1969. These former structures did not have associated
waste-oil USTs. The locations of these former structures is not known. From 1970 to
1986, the existing grease racks did not have associated waste-oil USTs. These grease
racks are currently connected to oil-water separators.
Several potential environmental concerns were identified by HLA (1993). These concerns
include:
Past and current uses and storage of POL and hazardous materials
The lack of containment or waste-oil tanks associated with the former wash
racks and grease rack
The failed leak test of the existing 1,000-gallon waste-oil UST
The absence of waste-oil USTs associated with the current grease racks from
1970 to 1986 .
The direct discharge of wastewater to surface drainage at the existing wash
rack
The reported overfilling of a UST
Aerial photographic evidence of areas of stains or soil discoloration at the site.
Site Characteristics
SGS samples were collected at 45 locations, soil boring samples were collected from 15
locations, sediment samples were collected from two locations, and a surface water
sample was collected from one location (Figure 2-27).
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Forty-eight SGS samples were collected at the 45 sampling locations. TVH was detected
at 12 locations and concentrations ranged from 1.3 to 42,700 ppmv. The concentration of
TVH was highest to the east of Building 985.
Thirty-seven soil boring and two sediment samples were collected at Site E. Chemical
analyses of samples included TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide.
Analytical results are summarized in Tables 2-2 and 2-3 and in Figures 2-27 and 2-28.
TPH-G was detected in one soil boring, with a maximum concentration of 7,200 mg/kg.
TPH-D was detected at five locations and the highest concentration was 19,000 mg/kg.
VOCs were detected at five soil boring and sediment sample locations. Detected
constituents included methylene chloride, acetone, carbon disulfide, 1,2-dichloroethane
(1,2-DCA), 2-butanone, TCE, benzene, toluene, ethyl benzene, and total xylenes, at
concentrations up to 8,000 mg/kg. Methylene chloride is a suspected laboratory
contaminant. SVOCs were detected at six locations. Detected constituents included
isophorone, naphthalene, 2-methylnaphthalene, dibenzofuran, fluorene, diethyl phthalate,
phenanthrene, anthracene, di-n-butyl phthalate, fluoranthene, pyrene, butyl benzyl
phthalate, chrysene, benzo(a) anthracene, bis(2-ethylhexyl) phthalate, benzo(a) pyrene,
and benzo(g,h,i) perylene, at concentrations up to 80 mg/kg. Organic constituents
selected as potential COCs are listed in the human health risk summary below. Inorganic
constituents identified as potential COCs were detected at 14 soil boring and sediment
sample locations at concentrations above background and/or naturally occurring
concentrations. The potential COCs included antimony, barium, cobalt, and lead.
One surface water sample was collected at the site. Analytical results are summarized in
Tables 2-4 and 2-5. No organic constituents or inorganic constituents identified as
potential COCs were detected at the surface water sample location.
Organic potential COCs at Site E appear to be limited to the paved area near the
northeast end of the wash rack, paved areas near the center and north corner of the site,
the east corner of the grease rack area, west of the fueling facility, and the area of the
fueling facility and its USTs. The data from soil boring samples suggest that the extent of
the organic potential COCs at the locations other than the fueling facility and its USTs is
limited to the shallow subsurface. Surface spills and runoff are the suspected sources of
the TPH-D, acetone, 2-butanone, carbon disulfide, and isophorone found in the surface
and shallow soil samples collected in these other areas.
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Leaking fuel UST(s) and/or fuel line(s) at the fueling facility are the suspected sources of
the TPH-G, TPH-D, lead, and other organic analytes detected in the soil samples
collected from borings drilled in that area. Although the risk assessment concluded that
the potential COCs detected in this area do not pose a significant threat to human health,
the concentrations of TPH-D and TPH-G that were detected are above HDOH clean-up
criteria. Further investigation and cleanup of this area was undertaken as part of the
installation's UST compliance program in April, 1996. At that time, the UST and
adjacent contaminated soil were removed.
Surface spills and runoff are also the suspected sources of the organic potential COCs
and lead detected in the sediment samples collected at Site E.
The distribution of the barium, cobalt, and lead detected in the soil samples collected
from the borings drilled at Site E in areas other than the wash rack and fueling facility
suggests that they are naturally occurring. Detection of barium in the surface soil boring
sample and the sediment sample collected from within the drainage ditch suggests it also
occurs naturally at Site E.
No organic constituents or inorganic potential COCs were detected in the surface water
sample collected at Site E.
The data indicate that the other potential sources identified at Site E have not
significantly impacted soil or sediment at the site.
Summary of Human Health Risks
Site E is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. The potential COCs at Site E included
acetone, carbon disulfide, 1,2-dichloroethane, 2-butanone, trichloroethene, benzene,
toluene, ethyl benzene, total xylenes, isophorone, naphthalene, 2-methylnaphthalene,
dibenzofuran, fluorene, diethyl phthalate, phenanthrene, anthracene, fluoranthene,
pyrene, butyl benzyl phthalate, chrysene, benzo(a)anthracene, bis(2-ethylhexyl)phthalate,
benzo(a)pyrene, benzo(g,h,i)perylene, antimony, barium, cobalt, and lead. The risk
assessment indicates that the potential COCs identified at Site E do not present an
unacceptable risk to human health.
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2.7.23 SiteH: Maintenance Area, Building 1080
Site Description
Site H, Figure 2-29, is a vehicle maintenance and storage area that is located at the
intersection of McMahon Road and an access road. Two drainage ditches border Site H.
The current facility was built in 1982, and two USTs were installed in the same year.
Historical records indicate that the site has been used for vehicle storage since about 1950
and that it may have been part of a larger motor pool by 1978.
A 1985 aerial photograph indicated surface discoloration near the grease rack. During a
site visit by HLA, no evidence of spills or releases was observed around the four shipping
containers used to store paint, solvents, and POL located near the site's fence to the
southeast of Building 1080. However, HLA personnel observed soil discoloration in the
drainage ditch adjacent to McMahon Road (HLA, 1993).
Potential environmental concerns identified by HLA (1993) are based on past and current
uses and storage of the hazardous materials mentioned above, the surface discoloration
observed in an aerial photograph that suggests possible unauthorized releases of
hazardous materials, and observation of an oily discoloration in the drainage ditch
downstream of the site. In addition, the existing SS/SD lines at Site H were identified as
possible sources of contaminants.
Site Characteristics
SGS samples were collected at 36 locations, soil boring samples were collected from 8
locations, sediment samples were collected from three locations, and surface water
samples were collected from four locations (Figure 2-29).
Thirty-nine SGS samples were collected from the 36 sampling locations. TVH and/or
BTEX was detected at 15 locations, and concentrations ranged from 0.027 to 53 ppmv.
The concentration of TVH was highest to the northwest of Building 1080.
Twenty-five soil boring and five sediment samples were collected at Site H. Chemical
analyses of samples included TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide.
Analytical results are summarized in Tables 2-2 and 2-3 and in Figure 2-29. TPH-G was
not detected in soil boring/sediment samples. TPH-D was detected at four soil
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boring/sediment sample locations, with a maximum concentration of 218 mg/kg.
Methylene chloride and acetone were detected at three soil boring and sediment sample
locations, with maximum concentrations of 0.002 mg/kg and 0.11 mg/kg, respectively.
Dimethyl phthalate, di-n-butyl phthalate, and bis(2-ethylhexyl) phthalate were detected
at two soil boring and sediment sample locations, at concentrations up to 28.4 mg/kg.
Di-n-butyl phthalate was considered to be a laboratory contaminant. Organic
constituents selected as potential COCs are listed in the human health risk summary
below. Inorganic constituents identified as potential COCs were detected at 10 soil
boring and sediment sample locations at concentrations above background and/or
naturally occurring levels. The potential COCs included barium, cobalt, lead, and zinc.
Four surface water samples were collected at the site. Analytical results are summarized
in Tables 2-4 and 2-5. No organic constituents were detected in surface water samples.
Inorganic constituents identified as potential COCs were detected at surface water
sample location #1 only. These potential COCs included copper, lead, nickel, and zinc.
Organic and inorganic analytes found above screening criteria at Site H appear to be
limited to two areas: the grease rack and the drainage ditches that border the site.
Surface spills are suspected to be the source of the low concentrations of TPH-D found in
the shallow soil samples collected at the grease rack. The grease rack's waste-oil tank is
suspected to be the source of the low concentrations of TPH-D and acetone found in one
deeper soil sample. The extent of TPH-D and acetone appears limited.
Sites upstream from Site H are suspected to be the source of the TPH-D, dimethyl
phthalate, bis(2-ethylhexyl)phthalate, barium, copper, lead, and zinc detected in the
sediment samples.
Summary of Human Health Risks
Site H is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. Because surface water run-off from Site H
may flow to areas accessible to residential populations, risk was also assessed for
residential exposure to potential COCs in surface water. The potential COCs in soil at
Site H included dimethyl phthalate, bis(2-ethylhexyl)phthalate, barium, cobalt, lead, and
zinc. The potential COCs in surface water were copper, lead, nickel, and zinc. The risk
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assessment indicates that the potential COCs identified at Site H do not present an
unacceptable risk to human health.
2.7.24 Site I: Maintenance Area, Building 1124
Site Description
Site I, Figure 2-30, is located in the west-central portion of the main post at the southeast
corner of Oahu Street and Beaver Road. Most of Site I is unpaved. Waikoloa Gulch, an
ephemeral stream, which is not a manmade drainage structure, borders Site I to the
southeast. A smaller drainage ditch runs along the east side of the site and discharges to
Waikoloa Gulch.
Most of the structures at Site I are unoccupied at this time. Since 1975, portions of the
site have been used intermittently by grounds maintenance personnel. Historical records
indicate that this site has been used as a motor pool and vehicle storage yard since 1960.
A firing range may also have operated on the site from 1942 to 1955.
Potential environmental concerns have been identified based on the following situations:
There is an oil stain of unknown origin at the east side of the site, possibly
associated with 23 unauthorized drums removed from the site in early 1992
There is no evidence of any measures taken to minimize the release of oil and
cleaning chemicals associated with a wash rack
55-gallon drums of hazardous waste were stored on site for an unknown
period (HLA, 1993). The condition and contents of the drums were unknown.
In addition, aerial photographs showed areas of soil discoloration in 1970, 1981, and
1985, and a 1969 aerial photograph indicates that the entire area may have been sprayed
with oil. The existing SS/SD lines at Site I were also included as possible sources of
contaminants.
Site Characteristics
SGS samples were collected at 59 locations, soil boring samples were collected from 17
locations, and sediment samples were collected from two locations (Figure 2-30).
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Sixty-five SGS samples were collected from the 59 locations. TVH and/or BTEX were
detected at 19 SGS sampling locations, at concentrations that ranged from 0.039 to 5.4
ppmv. The concentrations of TVH were highest near the central and northern area of the
site.
Forty-four soil boring and two sediment samples were collected at Site I. Chemical
analyses of samples included TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide.
Analytical results are summarized in Tables 2-2 and 2-3 and in Figure 2-30. TPH-G was
detected at two soil boring/sediment sample locations, with a maximum concentration of
73 mg/kg. TPH-D was detected at four soil boring/sediment sample locations, with a
maximum concentration of 74 mg/kg. Methylene chloride was detected at 12 soil boring
locations, with a maximum concentration of 0.0019 mg/kg. The methylene chloride
reported was considered to be a laboratory contaminant. Concentrations of
4-methylphenol, diethyl phthalate, and di-n-butyl phthalate were detected at six soil
boring/sediment sample locations at up to 0.31 mg/kg. The diethyl phthalate and di-n-
butyl phthalate reported were considered to be laboratory contaminants. Organic
constituents selected as potential COCs are listed in the human health risk summary
below. Inorganic constituents identified as potential COCs were detected at 17 soil
boring and sediment sample locations at concentrations above background and /or
naturally occurring levels. The potential COCs included arsenic, barium, cobalt, copper,
lead, and silver.
Organic analytes at Site I appear to be limited to the area associated with the former
wash rack in the northeastern portion of the site and the former grease rack and wash
rack locations in the southern portions of the site. The TPH-D and TPH-G present in the
drainage ditch may also have originated from these sources or may represent more
generalized site runoff from surface spills. The presence of 4-methylphenol in a single
sediment sample also is likely to represent runoff from surface releases in the vicinity of
the former grease racks. The extent of TPH-D, TPH-G, and 4-methylphenol in the site
soils appears to be limited.
Surface spills and runoff are the likely sources of lead at borings #2, #3, #4, #14, and
sediment sample #2. The erratic and widespread distribution of the remaining potential
inorganic COCs detected in soil boring and sediment samples suggests that these
inorganics are naturally occurring, since each of these analytes was found at
concentrations above their respective detection limits in most of the samples collected at
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Site I. Based on the risk assessment, the potential COCs identified at Site I do not
present an unacceptable risk to human health or the environment.
Summary of Human Health Risks
Site I is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. -The potential COCs at Site I included 4-
methyl phenol, barium, cobalt, copper, lead, and silver. The risk assessment indicates
that the potential COCs identified at Site I do not present an unacceptable risk to human
health.
2.7.25 SiteJ: Maintenance Area, Building 1180
Site Description
Site J, Figure 2-31, is a maintenance, repair, and storage area for construction and power
equipment, including heavy vehicles. SB records and aerial photographs indicate that the
site was unused open space before 1950. Most of Site J is unpaved.
A separately fenced area of Site J extends from the northwest comer of the main site. This
part of Site J includes a wash rack, with an associated oil-water separator and sanitary
sewer connection; a sandblasting area (Building 1180F); and a wrecked-vehicle and scrap
yard.
Potential environmental concerns were identified at Site J based on indications that a
UST, which was removed without soil remediation in 1991, was found to be leaking; on
the absence of an oil-water separator between the wash rack and discharge to Waikoloa
Gulch; on the presence of discolored soil in the unpaved POL dispensing area; on the use
of an unpaved area south of Building 1180 to store approximately 100 used batteries;
and on possible solvent use at the paint booth (HLA, 1993). In addition, the existing
SS/SD lines at Site J were identified as possible sources of contaminants.
Site Characteristics
SGS samples were collected at 32 locations, soil boring samples were collected from 17
locations, and sediment samples were collected from two locations (Figure 2-31).
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Forty SGS samples were collected from the 32 sampling locations. TVH and/or BTEX
were detected at 10 SGS sampling locations, at concentrations ranging from 0.027 to 9.8
ppmv. The concentration of TVH was highest to the south of Building C.
Forty-five soil boring and two sediment samples were collected at Site J. Chemical
analyses of samples included TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide.
Analytical results are summarized in Tables 2-2 and 2-3 and in Figure 2-31. TPH-G was
detected at one sediment sample location at 67 mg/kg. TPH-D was detected at three soil
boring/sediment sample locations, with a maximum concentration of 26.6 mg/kg.
Methylene chloride was detected at 10 soil boring locations, with a maximum
concentration of 0.0019 mg/kg. The methylene chloride reported was considered to be a
laboratory contaminant. Bis(2-ethylhexyl) phthalate, diethyl phthalate, and di-n-butyl
phthalate were detected in six soil borings, at concentrations up to 0.22 mg/kg. The
diethyl phthalate and di-n-butyl phthalate reported were considered to be laboratory
contaminants. Organic constituents selected as potential COCs are listed in the human
health risk summary below. Inorganic constituents identified as potential COCs were
detected at 16 soil boring and sediment sample locations at concentrations above
background and/or naturally occurring levels. The potential COCs included arsenic,
barium, cadmium, cobalt, copper, lead, and silver.
TPH-G and/or TPH-D in boring #10 and in both sediment samples and lead in sediment
sample #2 appear to be limited to two areas: the hazardous materials storage point
southwest of Building 1180C and the drainage area downstream from the washrack in the
northwest portion of the site. The absence of lateral or vertical distribution beyond these
isolated points is consistent with small surface releases of contaminants and/or site
runoff. The distribution of inorganic potential COCs suggests that they are naturally
occurring, due to their presence in samples from a number of depths at consistent
concentrations. Therefore, based on the analytical results of soil and sediment samples
from Site J, it does not appear that potential sources of contaminants at this site are
significantly impacting site soil or sediment quality.
Summary of Human Health Risks
Site J is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. The potential COCs at Site J included bis(2-
ethylhexyl)phthalate, arsenic, barium, cadmium, cobalt, copper, lead, and silver. The risk
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assessment indicates that the potential COCs identified at Site J do not present an
unacceptable risk to human health.
2.7.26 SiteK: Maintenance Area, Building 1611
Site Description
Site K, Figure 2-32, is located at the intersection of Lyman and Mellichamp Roads. Site K
is used as a tactical equipment maintenance facility and a vehicle storage and
maintenance area. The site has been used for these purposes since the early 1960s.
Records indicate that Motor Pool No. 4 occupied the site from 1962 to 1979 (HLA, 1993).
The main buildings on the site are Buildings 1611 and 1602, which are maintenance shops,
and Building 1604, which is a fueling facility with four fuel USTs.
Potential environmental concerns at this site include two spills at Site K, including diesel
from a tractor in 1990 and a waste-oil tank overflow at the grease rack located at
Building 1609 in 1991; areas of pavement and soil discoloration seen in aerial
photographs taken in 1970; waste oil UST 1609-1 which failed a leak test in November
1991; and possible releases of POL or solvents from the wash rack and a grease rack
(HLA, 1993). Also, the existing SS/SD lines at Site K were identified as possible sources
of contaminants.
Site Characteristics
SGS samples were collected at 29 locations, soil boring samples were collected from 12
locations, sediment samples were collected from two locations, and surface water
samples were collected from two locations (Figure 2-32).
Twenty-nine SGS samples were collected from the 29 sampling locations. TVH and/or
BTEX was detected at 17 locations, and concentrations ranged from 0.032 to 340 ppmv.
PCE was detected at 2 locations at up to 0.161 ppmv. The concentration of TVH was
highest at the stained soil area to the north of Building 1611.
Thirty soil boring and four sediment samples were collected at Site K. Chemical analyses
of samples included TPH-G, TPH-D, TPH-O, VOCs, SVOCs, and metals and cyanide.
Analytical results are summarized in Tables 2-2 and 2-3 and in Figure 2-32. TPH-G was
detected in one sediment sample at 52 mg/kg. TPH-D was detected in three soil borings
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and the highest concentration was 54.8 mg/kg. TPH-O was detected in one soil boring at
97.4 mg/kg. Acetone, chloroform, 2-butanone, TCE, and methylene chloride were
detected at four soil boring/sediment sample locations, at concentrations up to 0.059
mg/kg. The methylene chloride reported was considered to be a laboratory contaminant.
Diethyl phthalate, di-n-butyl phthalate, and bis(2-ethylhexyl) phthalate were found at
four soil boring/sediment sample locations, at concentrations up to 0.089 mg/kg. Bis(2-
ethylhexyl) phthalate was considered to be a laboratory contaminant. Organic
constituents selected as potential COCs are listed in the human health risk summary
below. Inorganic constituents identified as potential COCs were detected at 4 soil boring
locations at concentrations above background and /or naturally occurring levels
The two surface water samples were collocated with the sediment samples. Analytical
results are summarized in Tables 2-4 and 2-5. Di-n-butyl phthalate was detected at
1.03 ug/L at surface water sample location #2. Inorganic constituents identified as
potential COCs were detected at both surface water sample locations. These potential
COCs included cyanide and zinc.
Organic analytes found above screening criteria in samples collected from soil and
sediment borings at Site K appear to be limited to areas of known or suspected releases of
chemical constituents to the drainage swale to the south of the site. This swale is the
likely destination for chemicals released to the surface elsewhere on the site.
Inorganic analytes present in soil and sediment samples collected at Site K include
arsenic, barium, beryllium, cadmium, cobalt, and copper. The distribution of these
potential COCs suggests that they are naturally occurring, due to their presence in
samples from a number of depths at consistent concentrations.
Although di-n-butyl phthalate was detected in one surface water sample, it is probably a
laboratory contaminant, rather than an organic COG The potential inorganic COCs zinc
and cyanide were present in both of the water samples collected from the drainage swale
at Site K. Barium was also present in surface water samples collected at Site K. Since the
inorganic constituents were present in samples from both upgradient and downgradient
locations, an off-site source of these contaminants is likely.
TPH levels were below 100 mg/kg, and the maximum detected concentration of lead was
32 mg/kg. Based on the concentrations of potential COCs detected in surface water,
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sediment, and soil samples collected from Site K, it does not appear that there have been
significant releases of contaminants at Site K. Numerous small releases over the operating
history of the site and runoff from current site operations are the suspected sources of the
contaminants found in the drainage ditch and in the areas of the wash rack, the unused
grease rack, and the POL storage area.
Summary of Human Health Risks
Site K is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. Because surface water run-off from Site K
may flow to areas accessible to residential populations, risk was also assessed for
residential exposure to potential COCs in surface water. The potential COCs in soil at
Site K included methylene chloride, acetone, chloroform, 2-butanone, trichloroethene,
diethyl phthalate, di-n-butyl phthalate, bis(2-ethylhexyl)phthalate, arsenic, barium,
beryllium, cadmium, cobalt, and copper. The potential COCs in surface water were
cyanide and zinc. The risk assessment indicates that the potential COCs identified at
Site K do not present an unacceptable risk to human health.
2.7.27 Site L: Maintenance Area, Building 1621
Site Description
Site L, Figure 2-33, is bordered by Site K along its western and southern edges and by
Trimble Road along its northwestern edge. Site L has been used for vehicle storage and
maintenance since the ear-ly 1960s (HLA, 1993). Records indicate that Motor Pool No. 4
once occupied the site.
Potential sources of contaminants were identified during investigations that resulted in
Site L being included in OU 3. SB records report a diesel fuel leak from a tractor in 1991
(HLA, 1993). A site visit revealed additional areas of concern, including discoloration
along the boundary shared with Site K and a grassy area, located between Site L and
Trimble Road, where used oil overflowed during a rainy period. Six inactive USTs had not
been leak tested and therefore were identified as potential sources for the release of POLs
to the environment. Releases of oily waste from the wash rack to the storm drainage
system were also considered possible. A hazardous waste storage point is present on site
where hazardous wastes are stored in metal sheds that are covered by a tarp and bermed
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with sandbags (HLA, 1993). In addition, the existing SS/SD lines at Site L were
identified as possible sources of contaminants.
Site Characteristics
SGS samples were collected at 25 locations, soil boring samples were collected from six
locations, and sediment samples were collected from two locations (Figure 2-33).
Twenty-one SGS samples were collected from the 25 sampling locations. TVH and/or
aroma he VOCs (toluene and total xylenes) were detected at 18 SGS sampling locations,
and concentrations ranged from 0.026 to 5,000 ppmv. The concentration of TVH was
highest at the paved area east of Building 1624.
Fifteen soil boring and two sediment samples were collected at Site L. Chemical analyses
of samples included TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. Analytical
results are summarized in Tables 2-2 and 2-3 and in Figure 2-33. TPH-G was detected at
two soil boring/sediment sample locations, and the highest concentration was 12 mg/kg.
TPH-D was detected in three soil borings, with a maximum concentration of 51 mg/kg.
Concentrations of acetone (0.017 mg/kg), benzene (0.014 mg/kg), toluene (up to 0.073
mg/kg), ethyl benzene (0.020 mg/kg), and total xylenes (up to 0.056 mg/kg) were
detected in four soil borings. Butyl benzyl phthalate and di-n-butyl phthalate were
detected in sediment samples at up to 0.0683 mg/kg. Di-n-butyl phthalate was
considered to be a laboratory contaminant. Organic constituents selected as potential
COCs are listed in the human health risk summary below. Inorganic constituents
identified as potential COCs were detected in one soil sample at concentrations above
background levels. The potential GOCs included barium and copper.
Organic analytes present above screening criteria at Site L appear to derive from historic
vehicle maintenance operations at this site, including the wash rack, two grease racks and
an associated waste-oil UST, and, potentially, the waste storage point near the southern
site boundary. Only Boring #5, placed in the area of SGS sampling point #8, found no
evidence of potential organic COCs. However, the potential organic COCs detected at
Site L are limited in both their vertical and lateral distribution, reflecting a pattern of
minor surface releases, rather than major spills or leaks. Based on the concentrations and
distribution of potential COCs in shallow soil and sediment samples collected at this site,
Site L does not appear to be significantly impacting sediment quality.
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The inorganic potential COC barium was present above screening levels at samples from
boring #1 and #4 at concentrations that do not show a consistent pattern with depth.
Copper exceeded the screening level in a single sample collected from boring #1 at a depth
of 10 feet bgs. The presence and distribution of these analytes does not appear to relate
to past activities at Site L and is not consistent with a release.
Summary of Human Health Risks
Site L is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. The potential COCs at Site L included
acetone, benzene, ethyl benzene, toluene, total xylenes, butyl benzyl phthalate, barium,
and copper. The risk assessment indicates that the potential COCs identified at Site L
do not present an unacceptable risk to human health.
2.7.28 SiteO: Maintenance Area, Building 2400
Site Description
Site O, Figure 2-34, is located at the intersection of Road A and Lyman Road, on the
north side of Lyman Road near Lyman Gate. Site O is used for vehicle storage and
tactical equipment maintenance. The site was occupied by warehouses during the 1940s
and was part of Motor Pool No. 1 from the early 1950s to 1966 (HLA, 1993). The
current facility replaced Motor Pool No. 1 in 1966. The site appears to be unpaved in
aerial photographs taken in 1978. In aerial photographs taken in 1985, the site appears
to have been paved.
The areas of potential environmental concern identified by HLA (1993) at Site O include
the oil/water separators at wash racks taken out of service in 1984, which may have
discharged oil, grease, and/or solvents into drainage ditches; discolored soil near the fuel
UST fill area; stressed vegetation near the east side of the site; and potential past releases
of solvents and POL from dogging and overspill at the oil-water separator that services
the grease racks. The HLA PA (1993) indicated that the coral-type gravel that covered
the site before it was paved could increase the likelihood of lateral and vertical migration
of surface spills (HLA, 1993). The existing SS/SD lines at Site O were also identified as
possible sources of contaminants.
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Site Characteristics
SGS samples were collected at 21 locations, soil boring samples were collected from 12
locations, sediment samples were collected from two locations, and a surface water
sample was collected from one location (Figure 2-34).
Twenty-two SGS samples were collected from the 21 sampling locations. TVH and/or
aromatic hydrocarbons (ethyl benzene, toluene, and total xylenes) were detected at 17
SGS sampling locations. Concentrations ranged from 0.017 to 730 ppmv. The
concentration of TVH was highest in the paved area to the north/northeast of Building
2408.
Twenty-six soil boring and two sediment samples were collected at Site O. Chemical
analyses of samples included TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide.
Analytical results are summarized in Tables 2-2 and 2-3 and in Figure 2-34. TPH-G was
detected in two soil borings, and the highest concentration was 51 mg/kg. TPH-D was
detected at three soil boring/sediment sample locations, with a maximum concentration
of 246 mg/kg. VOCs including acetone, carbon disulfide, 2-butanone, and toluene were
detected at one soil boring location at up to 0.2 mg/kg. SVOCs were detected at six soil
boring and sediment sample locations. Maximum concentrations of detected SVOCs
included di-n-butyl phthalate (0.00333 mg/kg), fluoranthene (0.26 mg/kg), chrysene
(0.078 mg/kg), bis(2-ethylhexyl) phthalate (0.759 mg/kg), and benzo(a) pyrene (0.046
mg/kg). Organic constituents selected as potential COCs are listed in the human health
risk summary below. Inorganic constituents identified as potential COCs were detected
at 8 soil boring and sediment sample locations at concentrations above background
and/or naturally occurring levels. The potential COCs included arsenic, barium,
cadmium, cobalt, copper, lead, and mercury.
The one surface water sample was collocated with sediment sample #1. Analytical
results are summarized in Tables 2-4 and 2-5. No organic or inorganic constituents
identified as potential COCs were detected in the surface water sample.
Organic and inorganic analytes found above screening criteria at Site O show no clear
pattern of contaminant distribution, with the exception of organics and inorganics present
in the sediment samples and soil boring #8, which was placed in the drainage ditch near
sediment sample #2. It is likely that these constituents are caused by runoff from the site
over its years of industrial use. The presence of TPH-D, TPH-G, and other organics in
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samples from near surface soil borings are also likely to be related to small releases of
materials over the long-term use of the site for vehicle maintenance purposes, rather than
to specific major releases of hazardous materials.
Summary of Human Health Risks
Site O is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. The potential COCs at Site O included
acetone, carbon disulfide, 2-butanone, toluene, fluoranthene, chrysene,
bis(2-ethylhexyl)phthalate, di-n-butyl phthalate, arsenic, barium, cadmium, cobalt,
copper, lead, and mercury. The risk assessment indicates that the potential COCs
identified at Site O do not present an unacceptable risk to human health.
2.7.29 SiteP: Maintenance Area, Building 2420
Site Description
Site P, Figure 2-35, is located on the north side of Lyman Road. Site O is to the east of
Site P and Site Q is to the west of the site. Site P is used for vehicle storage and tactical
equipment maintenance. The site was occupied by a warehouse and shooting range
during the 1940s and 1950s and was open space from the 1950s to 1966 (HLA, 1993).
Most of the current improvements at the storage and maintenance facility were in place
by late 1985.
The areas of potential environmental concern originally identified at Site P (HLA, 1993)
included possible leaks from the two waste-oil USTs, possible releases from past POL
and solvent use due to the extended period of time the site has been used as a
maintenance area, and areas of soil discoloration near the wash rack and fueling facility
that are visible in 1985 aerial photographs. In addition, the existing SS/SD lines at Site P
were identified as possible sources of contaminants.
Site Characteristics
SGS samples were collected at 24 locations, soil boring samples were collected from 6
locations, sediment samples were collected from two locations, and surface water
samples were collected from two locations (Figure 2-35).
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Twenty six SGS samples were collected from the 24 sampling locations. TVH was
detected at 22 locations, and concentrations ranged from 1.2 to 9,100 ppmv. At seven
sampling locations where TVH was detected, carbon tetrachloride, TCA, and/or TCE
were also detected. The concentrations of TVH were highest at the paved area near the
northwest corner of the site.
Fourteen soil boring and two sediment samples were collected at Site P. Chemical
analyses of samples included TPH-G, TPH-D, and TPH-O, VOCs, SVOCs, and metals
and cyanide. Analytical results are summarized in Tables 2-2 and 2-3 and in Figure 2-35.
TPH-G was not detected in any of the soil boring or sediment samples. TPH-D was
found at four soil boring/sediment sample locations, with a maximum concentration of
197 mg/kg. TPH-O was found in one soil boring at 20.1 mg/kg. TCE was found in one
soil boring at 0.0022 mg/kg. Maximum concentrations of chrysene (0.087 mg/kg),
benzo(a) anthracene (0.02 mg/kg), bis(2-ethylhexyl) phthalate (0.28 mg/kg), benzo(a)
pyrene (0.014 mg/kg), and di-ni-butyl phthalate (0.12 mg/kg) were found in one soil
boring. Di-n-butyl phthalate was considered to be a laboratory contaminant. Organic
constituents selected as potential COCs are listed in the human health risk summary
below. Inorganic constituents identified as potential COCs were detected at
concentrations above background and/or naturally occurring levels at eight soil boring
locations. The potential COCs included barium, cadmium, copper, lead, mercury, silver,
vanadium, and zinc.
The two surface water samples were collocated with the sediment samples. Analytical
results are summarized in Tables 2-4 and 2-5. TPH-G was detected at one surface water
sample location at 2300 jig/L. Inorganic constituents identified as potential COCs were
detected at both surface water sample locations. These potential COCs included nickel
and zinc, with maximum concentrations of 8 ug/L and 40 ng/L, respectively.
Organic analytes found above screening criteria at Site P appear to be associated with
minor surface spills of POL at several locations on this site. The TPH-D detected in
sediment sample #2 in the southwest portion of the drainage ditch may have been
released from the wash rack at Site P. Activities upstream from Site P are suspected to be
the source of lead detected in the sediment sample taken from the southeast portion of
the drainage ditch. Activities upstream of Site P may also be the source of TPH present
in the northwest comer of the site. Based on the distribution of potential COCs in surface
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water, sediment, and soil samples collected from within the drainage ditches, Site P does
not appear to be significantly impacting water or sediment quality.
Summary of Human Health Risks
Site P is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. Because surface water run-off from Site P
may flow to areas accessible to residential populations, risk was also assessed for
residential exposure to potential COCs in surface water. The potential COCs in soil at
Site P included trichloroethene, fluoranthene, chrysene, benzo(a)anthracene,
bis(2-ethylhexyl)phthalate, benzo(a)pyrene, barium, cadmium, copper, lead, mercury,
silver, vanadium, and zinc. The potential COCs in surface water were nickel and zinc.
The risk assessment indicates that the potential COCs identified at Site P do not present
an unacceptable risk to human health.
2.7.30 SiteR: Maintenance Area, Building 2460
Site Description
Site R, Figure 2-36, is located to the west of Site P, on the north side of Lyman Road. Site
R is used as a consolidated vehicle storage and maintenance area. The site was used for
warehouses during the 1940s. Later, it was used for vehicle storage. Motor Pool No. 2B
occupied the site until demolition of the facility in the mid-1960s (HLA, 1993). The
present facility was constructed in 1982.
Potential environmental concerns originally identified at Site R (HLA, 1993) were based
on information indicating a possible leak from two fuel USTs, possible overflow of POL
or solvents from a wash rack oil-water separator to a nearby drainage ditch, and possible
releases from past POL and solvent use. In addition, the existing SS/SD lines at Site R
were investigated as possible sources of contaminants.
Site Characteristics
SGS samples were collected at 30 locations, soil boring samples were collected from 10
locations, sediment samples were collected from two locations, and surface water
samples were collected from three locations. (Figure 2-36).
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Thirty-one SGS samples were collected from the 30 sampling locations. Concentrations of
TVH and toluene were detected in a number of the SGS samples, ranging from 0.039
ppmv to 2,500 ppmv. The highest concentrations of TVH were found in paved areas near
the southwest comer of Building 2460 and to the east of Building 2460, between the
building and the grease racks.
Twenty soil boring and two sediment samples were collected at Site R. The samples were
analyzed for TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. The analytical
results are summarized in Tables 2-2 and 2-3 and on Figure 2-36. TPH-G was not
detected in any of the soil boring or sediment samples collected at the site. TPH-D was
found at four soil borings, with a maximum concentration of 56 mg/kg. 2-Butanone was
found at two soil borings, with a maximum concentration of 0.024 mg/kg. TCE was
found at one soil boring, with a maximum concentration of 0.0041 mg/kg. Bis(2-
ethylhexyl) phthalate was found at one soil borings, at 0.086 mg/kg. Di-n-buryl
phthalate was found at two soil borings, with a maximum concentration of 0.1 mg/kg.
Organic constituents selected as potential COCs are listed in the human health risk
summary below.
Barium, cadmium, copper, lead, mercury, silver, and vanadium were the inorganic
potential COCs identified in the soil boring and sediment samples collected at Site R.
Concentrations of barium greater than background levels were found at eight soil borings
and in one sediment sample. A concentration of cadmium greater than background was
found at one soil boring. Concentrations of copper greater than background were found
at one soil boring. Concentrations of lead greater than background were found at one soil
boring. A concentration of mercury greater than background was found at one soil boring.
Concentrations of silver greater than background were found at one soil boring. A
concentration of vanadium greater than background was found at one soil boring.
The three surface water samples were analyzed for TPH-G, TPH-D, VOCs, SVOCs, and
metals and cyanide. The analytical results are summarized in Tables 2-4 and 2-5 and on
Figure 2-36. TPH-G, TPH-D, VOCs, and SVOCs were not detected in the surface water
samples collected at the site. Zinc was the inorganic potential COC identified in the
surface water samples collected at Site R. Concentrations of zinc were found in each of
the surface water samples.
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Organic constituents found in soil borings at Site R appear to be limited to the area
around the grease rack, near Building 2460, and in the drainage ditch downstream from
the hazardous materials storage point (HMSP). Zinc concentrations in two surface water
samples exceeded the HDOH acute water quality standard for freshwater. Other
potential inorganic COCs found in soil boring and sediment samples appear to be
naturally occurring.
Based on the distribution and concentrations of organic constituents and inorganic
potential COCs in surface water, sediment, and soil boring samples collected from within
the drainage ditches, Site R does not appear to be significantly impacting water or
sediment quality.
Summary of Human Health Risks
Site R is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. Because surface water run-off from Site R
may flow to areas accessible to residential populations, risk was also assessed for
residential exposure to potential COCs in surface water. The potential COCs in soil at
Site R included acetone, 2-butanone, trichloroethene, di-n-butyl phthalate,
bis(2-ethylhexyl)phthalate, barium, cadmium, copper, lead, mercury, silver, and
vanadium. The only COC in surface water was zinc. The risk assessment indicates that
the potential COCs identified at Site R do not present an unacceptable risk to human
health.
2.7.31 SiteS: Maintenance Area, Building 2480
Site Description
Site S, Figure 2-37, is located to the west of Site R, on the north side of Lyman Road. Site
S is used as a vehicle maintenance area. The site was open space until the early-1950s
(HLA, 1993). By the mid-1950s, the site had become a vehicle storage yard. This motor
pool was renovated between 1966 and 1969 to provide for its current use. The main
drainage ditch that runs along the north side of Lyman Road runs along the south side of
Site S.
Potential environmental concerns originally identified at Site S (HLA, 1993) were based
on information indicating possible leaks from two former waste-oil tanks as well as the
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four current waste-oil and fuel USTs. Further, the potential for fuel spills near the fill
points for two fuel USTs; possible overflow of POL or solvents from a wash rack oil-
water separator to the nearby drainage ditch; discoloration near two grease racks, which
was visible in a 1978 aerial photograph; and discoloration in the northwest comer of the
site, which was visible in a 1985 aerial photograph, led to further remedial investigation
of Site S. The existing SS/SD lines at Site S were also identified as possible sources of
contaminants.
Site Characteristics
At Site S, SGS samples were collected at 32 locations, soil boring samples were collected
from 11 locations, sediment samples were collected from three locations, and surface
water samples were collected from two locations (Figure 2-37).
Thirty-seven SGS samples were collected from the 32 locations. PCE was detected at two
sampling locations at concentrations ranging from 0.026 to 0.029 ppmv. TVH and/or
BTEX were detected at 25 locations at concentrations ranging from 0.03 to 1,200 ppmv.
The highest concentrations of TVH were found in the west central portion of the site and
were not related to any of the suspected contaminant sources at this site.
Twenty-six soil boring and three sediment samples were collected at the site. Chemical
analyses of samples included TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide.
Analytical results are summarized in Tables 2-2 and 2-3 and in Figure 2-37. TPH-G was
detected at two locations, with a maximum concentration of 3,945 mg/kg. TPH-D was
detected at seven locations, with a maximum concentration of 1,800 mg/kg. Acetone was
detected at three locations, with a maximum concentration of 0.23 mg/kg. 2-Butanone
and 2-Hexanone were each detected at one location, with maximum concentrations of
0.026 mg/kg and 0.0078 mg/kg, respectively. Ethyl benzene was detected at two
locations, with a maximum concentration of 0.0044 mg/kg. Methylene chloride was
reported at three soil boring locations. However, the methylene chloride in these samples
is considered to be a laboratory contaminant. 4-Methyl-2-pentanone and Naphthalene
were each detected at two locations, with maximum concentrations 0.018 mg/kg and 13
mg/kg, respectively. Toluene and total xylenes were each detected at three locations,
with maximum concentrations of 17.5 mg/kg and 21.4 mg/kg, respectively. TCE was
detected at two locations, with a maximum concentration of 0.009 mg/kg. Di-n-octyl
phthalate was reported for one of the sediment sample locations, at 0.252 mg/kg, and
bis(2-ethylhexyl) phthalate and di-n-butyl phthalate were reported at both sediment
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locations, at concentrations of up to 0.411 mg/kg. However, the reported concentrations
of these phthalate species are considered to be laboratory contaminants. Organic
constituents selected as potential COCs are listed in the human health risk summary
below. Inorganic constituents identified as potential COCs included barium, chromium,
copper, lead, thallium, and zinc. Concentrations of one or more inorganic potential COCs
were greater than background and/or naturally occurring levels at five soil boring
locations and two sediment sample locations.
Three surface water samples were collected at the site. Analysis results are summarized
in Tables 2-4 and 2-5. No organic constituents were detected in the surface water
samples collected at Site S. Cyanide and zinc were the inorganic potential COCs
identified in the surface water samples.
Petroleum hydrocarbons at Site S appear to be limited to the west-central portion of the
site (southwest of Building 2480); the source of these hydrocarbons is not known. Surface
spills of fuels, POLs, and solvents; flow from the wash rack to the drainage ditch near the
southeast corner of the site; and runoff from precipitation and/or wash water appear to
be the sources of the organic constituents detected in the soil boring and sediment samples
collected from the drainage ditches on the south side of the site. The sites upstream of
Site S may also have contributed to the levels of lead and zinc found in the drainage ditch
on the south side of the site.
Summary of Human Health Risks
Site S is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. Because surface water run-off from Site S
may flow to areas accessible to residential populations, risk was also assessed for
residential exposure to potential COCs in surface water. The potential COCs in soil at
Site S included acetone, 2-butanone, trichloroethene, 2-hexanone, toluene, ethyl benzene,
4-methyl-2-pentanone, total xylenes, naphthalene, bis(2-ethylhexyl)phthalate, di-n-octyl
phthalate, barium, chromium, copper, lead, mercury, thallium, and zinc. The potential
COCs in surface water were cyanide and zinc. The risk assessment indicates that the
potential COCs identified at Site S do not present an unacceptable risk to human health.
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2.7.32 SiteU: Maintenance Area, Building 2600
Site Description
Site U, Figure 2-38, is located immediately to the north of Sites O and P, near the
intersection of Foote Avenue and Road A. Site U is used as a vehicle maintenance and
storage area. The site was used primarily as a vehicle storage area between 1953 and
1969 (HLA, 1993). Before 1953, warehouses and related structures occupied the site.
The south side, west side, and most of the north side of the site are bordered by unlined
drainage ditches. The drainage ditch that runs along the south side of the site lies
between Site U and Sites O and P.
Several potential environmental concerns were identified at Site U, and further remedial
investigation was recommended for these locations. The concerns included possible leaks
from the four current waste-oil and fuel USTs; possible overflow of POL or solvents from
the wash rack oil-water separator to the nearby drainage ditch; possible releases from
past POL and solvent use, particularly near the hazardous waste storage area in the
northwest corner of the site; and soil discoloration in the area surrounding the storm drain
inlet near the center of the site (based on aerial photographs taken in 1978) (HLA, 1993).
These locations were investigated in addition to the existing SS/SD lines at Site U.
Site Characteristics
At Site U, SGS samples were collected at 39 locations, soil boring samples were collected
from 13 locations, and sediment samples were collected from three locations
(Figure 2-38).
Forty-two SGS samples were collected from the 39 locations. PCE was detected at one
sampling location at 0.031 ppmv. TVH and/or BTEX were detected at 22 locations at
concentrations ranging from 0.003 to 24 ppmv. The highest concentrations of TVH were
found near the fueling facility at the east end of the site and the wash rack in the
southwest comer of the site.
Twenty-nine soil boring and three sediment samples were collected at the site. Chemical
analyses of samples included TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide.
Analytical results are summarized in Tables 2-2 and 2-3 and in Figure 2-38. TPH-G was
not detected in the soil boring or sediment samples. TPH-D was detected at one soil
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boring location and at one sediment sample location, with a maximum concentration of
141 mg/kg. Methylene chloride was reported at five soil boring locations, but the
methylene chloride in these samples is considered to be a laboratory contaminant. Bis(2-
ethylhexyl) phthalate was reported for two sediment samples, and di-n-butyl phthalate
was reported for one soil boring location and all three sediment locations, but the
reported concentrations of these phthalate species are considered to be laboratory
contaminants. Organic constituents selected as potential COCs are listed in the human
health risk summary below. Inorganic constituents identified as potential COCs included
barium, cobalt, lead, thallium, and zinc. Concentrations of one or more inorganic
potential COCs were greater than background and/or naturally occurring levels at four
soil boring locations and two sediment sample locations.
Petroleum hydrocarbons at Site U appear to be limited to TPH-D in the area near the
wash rack and in the drainage ditches that border the site. Surface spills are suspected to
be the source of the low concentrations of TPH-D found in the shallow soil samples
collected in both areas. Sites upstream from Site U are suspected to be the source of the
lead and TPH-D in the sediment sample collected from the northwest portion of the
drainage ditch.
Summary of Human Health Risks
Site U is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. The potential COCs at Site U included
bis(2-ethylhexyl)phthalate, barium, cobalt, lead, thallium, and zinc. The risk assessment
indicates that the potential COCs identified at Site U do not present an unacceptable risk
to human health.
2.7.33 SiteV: Maintenance Area, Building 2620
Site Description
Site V, Figure 2-39, is located immediately west of Site U. Site V has been used since
1991 as a vehicle storage area. The site's existing structures were constructed in 1975 and
are situated in the southern end of the site (HLA, 1993). Although vehicle maintenance
operations are not currently performed at Site V, the presence of a grease rack indicates
that such operations may have been performed there in the past.
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Several potential environmental concerns were identified at Site V (HLA, 1993), and
further remedial investigation was recommended for these locations. The concerns
included a possible release at the storage point in the south central portion of the site, as
suggested by distressed vegetation that was observed during the PA site visit, and areas
of staining observed under the grease rack in aerial photographs from 1978 and 1985.
These locations were investigated in addition to the existing SS/SD lines at Site V.
Site Characteristics
At Site V, SGS samples were collected at 12 locations, and soil boring samples were
collected from 3 locations (Figure 2-39).
Fourteen SGS samples were collected from the 12 locations. TVH and/or BTEX were
detected at five locations at concentrations ranging from 0.038 to 2.8 ppmv.
Seven soil boring samples were collected at the site. Chemical analyses of samples
included TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide. Analytical results are
summarized in Tables 2-2 and 2-3 and in Figure 2-39. Methylene chloride was reported in
a field duplicate sample, but the methylene chloride in this sample is considered to be a
laboratory contaminant. No other organic constituents were detected in the soil boring
samples collected at Site V. Inorganic constituents identified as potential COCs included
antimony, cadmium, chromium, and copper. Concentrations of the four inorganic
potential COCs were greater than background and/or naturally occurring levels at one
soil boring location.
Based on the data from the field investigation, soils at the site have not been significantly
impacted by U.S. Army activities.
Summary of Human Health Risks
Site V is an industrial site, and on-site risk was assessed for industrial populations based
on exposure to potential COCs in site soils. The potential COCs at Site V included
antimony, cadmium, chromium, and copper. The risk assessment indicates that the
potential COCs identified at Site V do not present an unacceptable risk to human health.
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2.7.34 Site W: Maintenance Area, Building 2640
Site Description
Site W, Figure 2-40, is located immediately to the west of Site V. Site W is used primarily
as a vehicle storage area. The site was occupied by warehouses from before 1941 through
the 1950s (HLA, 1993). By 1969, the warehouses had been removed and replaced by
vehicle storage areas.
Several potential environmental concerns were identified based primarily on historical
uses at Site W (HLA, 1993), and further remedial investigation was recommended for
these locations. The concerns included possible contamination near the abandoned fuel
dispenser islands, possible overflow of POL or solvents from the wash rack to the nearby
drainage ditch, possible releases from past POL and solvent use and storage, and
possible releases of POLs and solvents in and around the grease rack. These locations
were investigated in addition to the existing SS/SD lines at Site W.
Site Characteristics
At Site W, SGS samples were collected at 37 locations, soil boring samples were collected
from 13 locations, and sediment samples were collected from two locations (Figure 2-40).
Forty-one SGS samples were collected from the 37 locations. TVH and/or BTEX were
detected at 13 locations at concentrations ranging from 0.024 to 11 ppmv. The highest
concentrations of TVH were found near the former fueling facility in the northeast corner
of the site.
Twenty-five soil boring and two sediment samples were collected at the site. Chemical
analyses of samples included TPH-G, TPH-D, VOCs, SVOCs, and metals and cyanide.
Analytical results are summarized in Tables 2-2 and 2-3 and in Figure 2-40. TPH-G was
detected at one soil boring location at 14 mg/kg and in one sediment sample at 30 mg/kg.
TPH-D was detected at five soil boring locations and at one sediment sample location,
with a maximum concentration of 410 mg/kg. Acetone was reported at two sampling
locations, with a maximum concentration of 0.044 mg/kg. Methylene chloride was
reported at three soil boring locations, but the methylene chloride in these samples is
considered to be a laboratory contaminant. Bis(2-ethylhexyl) phthalate was reported for
one soil boring location, and di-n-butyl phthalate was reported for two soil boring
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locations and both sediment locations, but the reported concentrations of these phthalate
species are considered to be laboratory contaminants. The polynudear aromatic
hydrocarbon (PAH) compounds acenapthene, anthracene, fluoranthene, phenanthrene,
and pyrene were detected at one sediment sample location at 0.0302 mg/kg, 0.0652
mg/kg, 0.22 mg/kg, 0.221 mg/kg, and 0.374 mg/kg, respectively. Organic constituents
selected as potential COCs are listed in the human health risk summary below. Inorganic
constituents identified as potential COCs included antimony, barium, lead, mercury, and
zinc. Concentrations of one or more inorganic potential COCs were greater' than
background and /or naturally occurring levels at eight soil boring locations and one
sediment sample location.
The grease rack in the southwest corner of the site is the suspected source of the TPH-D,
TPH-G, acetone, and lead in the southwest corner of the site, since the rack has no
pavement or other method of containment beneath it. The source of the TPH-D in the
southeast corner of the site may be the POL storage shed in that area. Surface spills from
the wash rack in the southern portion of the site are the suspected sources of the PAHs
and lead found in the drainage swale, downstream of the washrack. The TPH-G and
TPH-D in the southeast end of the drainage swale may not have originated from Site W,
since they were detected in the upstream end of the swale relative to Site W.
Summary of Human Health Risks
Site W is an industrial site, and on-site risk was assessed for industrial populations
based on exposure to potential COCs in site soils. The potential COCs at Site W
included TPH-D, methylene chloride, acetone, acenaphthene, phenanthrene, anthracene,
di-n-butyl phthalate, fluoranthene, pyrene, antimony, barium, lead, mercury, and zinc.
The risk assessment indicates that the potential COCs identified at Site W do not present
an unacceptable risk to human health.
2.8 Summary of Ecological Risks
An Ecological Risk Assessment was performed to qualitatively evaluate the potential for
significant ecological harm from potential constituents of concern identified at the OU 3
sites. This risk assessment is presented in Section 3.37 of the RI.
There are no designated wilderness areas, wildlife refuges, or scenic rivers within the
confines of OU 3 at SB. In addition, sensitive and endangered species do not inhabit
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areas proximal to OU 3, and the extensive development of the OU 3 area has virtually
eliminated native flora and fauna.
Within the developed portion of the base, vegetation and animal life consists of
introduced species (non-native to Hawaii, such as small terrestrial animals and birds)
(U.S. Army, 1993). These types of animals may, therefore, come in contact with potential
constituents of concern in OU 3 soils. The results of the qualitative evaluation of risk
indicated that it is unlikely that these animals will ingest a sufficient amount of
contaminated soil to be adversely affected. Therefore, there is no ecological risk to these
animals.
There are no perennial streams located within OU 3 and thus, no sustained freshwater
aquatic life. Waikakalaua Stream, which is located approximately one mile from SB, is
the first perennial stream located downstream of SB that has the potential to be impacted
by surface runoff from OU 3. Based on detected constituent concentrations in surface
runoff collected at OU 3 and dilution factors that estimate the downstream
concentrations of site runoff after mixing with off-site runoff, concentrations of potential
constituents of concern that enter Waikakalaua Stream will meet the Hawaii Department
of Health's Standards for freshwater aquatic life. Therefore no ecological risk was
determined to exist for runoff from OU 3 sites.
2.9 Selection of No Action Alternative Based on Risk Evaluation
Risk evaluations performed on the RI data for the OU 3 sites indicate that chemicals
detected in the surface soil, subsurface soil, and surface water and sediment at the OU 3
sites do not pose a threat to human health and the environment because (1) estimated
risks are within ranges considered acceptable by the U.S. EPA; (2) chemical
concentrations are representative of background conditions; and/or (3) a route of
exposure does not exist. Therefore, no remedial actions at the OU 3 sites are necessary to
protect human health and the environment.
2.10 Documentation of Significant Changes
As described in the Responsive Summary (Section 3.0), the Proposed Plan was released
for public comment on April 11, 1996 and a public meeting was held on May 1, 1996.
This proposed Plan identified "no action" as the selected response action for the OU 3
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sites investigated. Comments were collected over the 30-day public review period
between April 11 and May 11,1996.
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3. RESPONSIVENESS SUMMARY
3.1 Overview
This section will provide a summary of the public comments and concerns regarding the
Proposed Plan at SB, Island of Oahu, Hawaii. At this time, the U.S. Army has selected the "no
remedial action" preferred alternative for the OU 3 sites.
3.2 Background on Community Involvement
The U.S. Army has implemented a progressive public relations and involvement program for
environmental activities at SB. A Technical Review Committee, comprised of representatives
from the U.S. Army, the U.S. EPA, the State of Hawaii Department of Health, U&A, and
members of the general public, has been established and meets periodically to involve the public
in decisions regarding investigation results, proposed work, and potential remedial options.
The U.S. Army has also presented RI plans and results at public meetings conducted on
February 25,1993, and on September 13 and 14, 1994. Prior to each of these public meetings,
the U.S. Army distributed over 50 copies of a fact sheet to interested parties and to the
information repositories (Section 2.4). These fact sheets described the installation restoration
program at SB, and included a discussion of how the public could get more information and get
involved in the program. A synopsis of community relations activities conducted by the U.S.
Army is presented in Appendix A.
The U.S. Army held a public comment period on the OU 3 no action preferred alternative from
April 11 through May 11, 1996. Copies of the Proposed Plan were placed in the above
discussed repositories (Section 2.4) and were mailed to the public for review and comment. The
Proposed Plan also invited readers to a public meeting to voice their concerns. This public
meeting was held to discuss the selected "no remedial action" preferred alternative. The
meeting was held on May 1, 1996, at 7:00 p.m., in the Hale Koa at Wahiawa District Park,
Wahiawa, Hawaii. Comments received during the public comment period are addressed below.
3.3 Summary of Comments Received During Public Comment
Period and Department of the U.S. Army Responses
No written comments were received from the public regarding the OU 3 Proposed Plan.
3-1
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4. REFERENCES
Dale, R. H., and Takasaki, K. ]., 1976, Probable effects of increasing pumpage from the
Schofield Groundwater Body, Island of Oahu, Hawaii, U.S. Geological Survey Water-
Resources Investigations, No. 76-47, Prepared in cooperation with the Board of Water
Supply, City and County of Honolulu, Hawaii.
Directorate of Public Works-U.S. Army Garrison, Hawaii, Schofield Army Barracks, Hawaii,
1996, personal communication.
Giambelluca, T. W., Nullet, M. A., and Schroeder, T. A., 1986, Rainfall Atlas of Hawaii, Report
Number R76, Water Resources Research Center, University of Hawaii, June.
Harding Lawson Associates, 1995, Final Remedial Investigation Report for Operable Unit 1,
Schofield Army Barracks, Island of Oahu, Hawaii.
, 1993a, Draft Final Preliminary Assessment Report and Sampling and Analysis Plan for
Operable Unit 3, Schofield Army Barracks, Island of Oahu, Hawaii, Volume I of ffi,
prepared for U.S. Army Toxic and Hazardous Materials Agency, Contract No. DAA AQ5-
91-D-00013, Delivery Order No. 0003.
, 1993b, Total Environmental Program Support, Draft Preliminary Assessment Report and
Sampling and Analysis Plan for Operable Unit 3, Schofield Army Barracks, Island of Oahu,
Hawaii, Volume I of HI, Prepared for U.S. Army Toxic and Hazardous Materials Agency,
Contract No. DAAAQ5:91-D-00013, Delivery Order No. 0003.
HDOH, 1992, Hawaii Department of Health (HDOH) Interim Recommended Cleanup Criteria
for Soil and Water, Hawaii Underground Storage Tank (UST) Guidance Manual.
IMS Engineers-Architects, P.C., 1994, Final Field Screening Sampling and Analysis Plan,
Operable Unit 3, Schofield Army Barracks, Island of Oahu, Hawaii.
, 1993, Draft Report: Preliminary Assessment of Operable Unit 3 Sites, Schofield Army
Barracks, Island of Oahu, Hawaii, Volume I of in, Text.
Matsuoka, I., Tateishi, G.A., Lum, M.G., and Kunishige, V.E., 1991, Water Resources Data,
Hawaii and Other Pacific Areas, Water Year 1990, Vol. I - Hawaii, U.S. Geological Survey
Water Data Report HI-90-1.
4-1
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Morrison Knudsen Corporation, 1994, Underground Storage Tank (UST) Closure Report, MK
Report No. 4277-CR-064.
Rubeck Engineering and Construction, Inc., 1992, Tank Closure and Site Assessment Report,
Tank No. 4, Building 1054.
Transglobal Environmental Geochemistry, Hawaii and IMS Engineers-Architects, P.C., 1993,
Soil Gas Survey, Operable Unit 3 Sites, Island of Oahu, Hawaii.
U&A, 1996, Final Remedial Investigation Report, Operable Unit 3, Schoh'eld Army Barracks,
Island of Oahu, Hawaii, Volumes 1-6.
U.S. Army, 1993, Environmental Assessment for Construction of Family Housing at Leader
Field, Schofield Barracks, Hawaii, Department of the U.S. Army, Headquarters, 25th
Infantry Division (Light) and U.S. Army, Hawaii, Schofield Barracks, Hawaii.
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5.
ABBREVIATIONS / ACRONYMS
U.S. Army U.S. Department of U.S. Army
BTEX benzene, toluene, ethyl benzene, and total xylenes
CERCLA Comprehensive Environmental Response, Compensation and Liability Act
COC constituent of concern
CPF cancer potency factor, (mg/[kg body mass]/day)"1
DCA dichloroethane
DDE 2,2-bis(p-chlorophenyl)-l,l-dichloroethene
DDT 2,2-bis(p-chlorophenyl)-l,l,l-trichloroethane
DERP Defense Environment Restoration Program
DOD Department of Defense
DPW Directorate of Public Works (SB)
EPA Environmental Protection Agency
EPIC Environmental Photographic Interpretation Center
FFA Federal Facilities Agreement
FS Feasibility Study
FSSAP Field Screening Sampling and Analysis Plan
HDOH State of Hawaii, Department of Health
HI Hazard Index
HMSP hazardous materials storage point
HQ Hazard Quotient
IMS IMS Engineers-Architects, P.C.
IRP Installation Restoration Program
MCL maximum contaminant level
NGVD National Geodetic Vertical Datum
NPL National Priorities List
PA preliminary assessment
PAH polynuclear aromatic hydrocarbons
PCB polychlorinated biphenyls
PCE tetrachloroethylene/tetrachloroethene
POL Petroleum, Oil, and Lubricants
ppmv parts per million by volume
RfD reference dose
Rl Remedial Investigation
5-1
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RME reasonable maximum exposure
ROD Record of Decision
SARA Superfund Amendments and Reauthorization Acts
SB Schofield Barracks
SGS Soil-Gas Survey
SI Site Investigation
SS/SD sewer system/storm drain
SSP satellite storage point
SVOC semi-volatile organic compound
TCA (1,1/1-; 14,2-) trichloroethane
TCE trichloroethylene/trichloroethene
TEG Transglobal Environmental Geochemistry
TEG-H Transglobal Environmental Geochemistry, Hawaii
TEPS Total Environmental Program Support
TPH total petroleum hydrocarbons
TPH-D total petroleum hydrocarbons, as diesel
TPH-G total petroleum hydrocarbons, as gasoline
TPH-O total petroleum hydrocarbons, as oil
TVH total volatile hydrocarbons
U&A Uribe and Associates
US A EC United States U.S. Army Environmental Center
U.S. EPA U.S. Environmental Protection Agency
UST underground storage tank
VOC volatile organic compound
5-2
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APPENDIX A
-------
Appendix A: Synopsis of Community Relations Activities
May 1985 - Schofield Barracks issued a press release regarding the detection of
Trichloroethylene (TCE) in the Schofield Barracks Supply wells and the temporary switch to
city an county water supplies.
August 1990 - Schofield Barracks issued a press release regarding the placement of installation
on the National Priorities List (NPL).
October 1990 - Schofield Barracks Public Affairs Office and Environmental Office addressed
the Wahiawa Neighborhood Board regarding Army plans to conduct investigations on Schofield
Barracks to identify sources of TCE.
January 1992 - Schofield Barracks and U.S. Army Toxic and Hazardous Materials Agency
(USATHAMA) submitted press releases requesting public involvement in locating the source(s)
of TCE contamination in and around Schofield Barracks.
January 1992 - Schofield Barracks and USATHAMA conducted interviews with twenty local
residents to assist in the development of a Community Relations Plan for the Schofield Barracks
Installation Restoration Program (1RP).
June 1992 - The Army finalized the Community Relations Plan for Schofield Barracks and
placed copies in the newly established information repositories located in the Mililani Public
Library, the Wahiawa Public Library, the Hawaii Department of Health, and the Directorate of
Public Works in Building 300 of Wheeler Army Airfield.
February 25,1993 - Schofield Barracks and the Army Environmental Center (AEC) conducted a
public meeting at the Hale Koa at Wahiawa District Park in Wahiawa to provide the public
with an update on the IRP and the results of the first phase of the investigations.
February 1993 - In conjunction with the public meeting, the Army published and distributed a
fact sheet that provided an update on the IRP and initial investigative results.
September 13 and 14, 1994 - Schofield Barracks and the AEC conducted public availability
sessions at the Hale Koa at Wahiawa District Park (September 13) and at the Schofield
Barracks Post Library (September 14) to provide an update on the IRP.
A-l
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September 13 and 14, 1994 - In conjunction with the public availability sessions, the Army
solicited interest in the formation of a Restoration Advisory Board (RAB) comprised of local
citizen representatives, Army representatives, and regulatory agency representatives that would
oversee the conduct of the Army's IRP at Schofield Barracks.
September 12 through 14, 1994 - The Army presented a poster display that summarized
installation restoration efforts and plans for the Schofield Barracks at the 1st Hawaii National
Technologies Conference sponsored by the Hawaii Department of Health.
September 1994 - In conjunction with the" public availability session, the Army published and
distributed a fact sheet that provided an update on the IRP and initial investigative results.
April 11 to May 11, 1996 - Schofield Barracks conducted a public review period for the
Proposed Plan for Operable Unit 3.
May 1, 1996 - Schofield Barracks and the AEC conducted a public meeting to present the
Operable Unit 3 Proposed Plan and solicit public comments.
A-2
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FIGURES
-------
Pacific Ocean
Peart City Kaneohe
Pearl
Harbor
Honolulu
LEGEND
Scholield Barracks
Cities, towns
Rivers, streams
Highways, roads
Scale
5
10
Uilao
IVIII03
10
Kilometers
ioure*: Harding Lawson Associates,
Final Remedial Investigation Report,
Operable Unit 1. Scholield Barracks,
stand ol Oahu, Hawaii,11994.
Prepared for:
U.S. Army Environmental Center
Aberdeen Proving Ground, Maryland
Location Map of Schofield Barracks
Schofield Barracks OU 3
Island of Oahu, Hawaii
Figure 1-1
ftOOfigun M &SMFCFH
-------
LEGEND
Prepared tot:
u S Army Environmental Cental
AMfdMA Proving Ground. U*ryi*nd
Srie Map trf SchoWW B«iradi»
SchofieU DvracKs OU 3
Wand of Oanu. Haw*.
Figure !?
-------
Site Locations Main Post
U.S. Aimy EiNlroraMnM
PtaMng Onxm, Mvylwia
Schofield Barracku OU 3
Island of Oahu, Hawaii
-------
Jfi
WHEELER ARMY AIRFIELD
LEGEND
SuftanWiMf
BulWng
PnpMdtOR
U.S. Amv tnvtromxrt* Confer
AtwdMn Pioxlng Onuna. Moylvx)
Site Locations East Range
Schofleld Barracks OU 3
Island of Oahu, Hawaii
Figure
1-4
-------
West
Waianae Mountain Ranga
Elevation 3700 Feet (NGVD)
East
Koolau Mountain Range
Elevation 2600 Feet (NGVD)
Source: Harding Lawson Associates.
Tina) Remedial investigation Report,
Operable Unit 1. Schofield Barracks.
Island of Oahu. Hawaii,' 1994.
LEGEND
r I Volcanic Series
F^~1 Fresh Water
["""I Saltwater
III «*"
NOTE: Elevations am shown In feet above the National
Geodetic Vertical Datum of 1929 (NGVD).
Scale
2
Prepared for:
U.S. Army Environmental Center
Aberdeen Proving Ground. Maryland
Miles
Generalized Regional Cross-Section
Schofield Barracks OU 3
Island of Oahu, Hawaii
Figure 2-1
ROD Figunt-14/3&X FH PC
-------
300 -r-
0 -
SEP
Source: Harding Lawson Associates.
'Final Remedial Investigation Report.
Operable Unit 1, Schofield Barracks.
Island ol Oahu. Hawaii.' 1994.
Prepared for:
U.S. Army Environmental Center
Aberdeen Proving Ground, Maryland
Hydrograph for the South Fork of
Kaukonahua Stream, October 1989
through September 1990
Schofield Barracks OU 3
Island of Oahu, Hawaii
Figure 2-2
POO Figvn
FHMP
-------
Pacific Ocean
B'
KawainB
Basal Water
Northern
Groundwaler
Dam
Schofietd
Barracks
East Range
Southern
GnundiulsT
Dm
Honolulu-Pearl Harbor
Basal Water Body
BY
Schofield
Barracks
Main Post
LEGEND
IB SchofieM Barracks
FIB Basal Water Body
p/T!x| Scfiofield High-level Water Boety
[ . - ^| Dike-impounded Water Body
| | Groundwater dam
A'
Generalized cross section line
Scale
5
10
Miles
Boundary between groundwatar bodies
Rivers, streams
Note: Cross sections are shown on Figure 2-4.
Source: Harding Lawson Associates,
'Final Remedial Investigation Report,
Operable Unit 1. Schofield Barracks,
Island of Oahu, Hawaii.' 1994.
Prepared for:
U.S. Army Environmental Center
Aberdeen Proving Ground, Maryland
Regional Groundwater Systems of
Oahu, Hawaii
Schofield Barracks OU 3
Island of Oahu. Hawaii
Figure 2-3
«OD figun 2-3 &1/96 FH FC
-------
0)
0)
LL
O
Ul
Waialua
Basal Water
Body
:-:>. S;W
' '" ' .. "-.'.. iT . ? /
B
£
O
UJ
Waianole Transmission
Tunnel
City and County
Tunnel
Waia
Dike-impou
Water-Body
oolau
iRe-impounded
Water Body
LEGEND
|^ | Low-permeabrtity rock
PgfeJ Fresh groundwaler
|| Saline groundwaler
t Groundwaler flow line
4r (generalized direction)
Scale
3
MIIOS
Note: Cross-section Ones are shown on Figure 2-3.
Source: Harding Lawson Associates.
'Final Remedial Investigation Report.
Operable Unit 1. Scnofield Barracks,
Island of Oahu. Hawaii,' 1994.
Prepared for:
U.S. Army Environmental Center
Aberdeen Proving Ground, Maryland
Regional Hydrogeologic Cross
\~/\ 300 D"
SchofieW Barracks OU 3
Island of Oahu, Hawaii
Figure 2-4
ROD Kgi^^fearas fH UP
-------
Pectickte Mining Arua
Poslicide Storago Shod
LEGEND
369C
T-388C
\
. I. . I . I ( ' II II
l ..... . . 1 tlf k .| ., .'
.in I.....IK rtr k ,i .
1. Mm II. I ' I" k < ' '
1-...t. i) ,:..,fvi (-/(- i ,
II. .- I'll I I '
,. . .. i. >.:! ./i » .1
-. I.' I. .'. . k ! il .
! ..... ...... ')'.! i (.> KU a i
l'r...n .-,. I. '* i ( tf .it
I II . B I « .1 . -.'
.1,1.11,1 i,v ' ;'
'!.. « '.' " crtMi ipra
w noun «-< » *»
*""~ ' -------
nhd ki
al oodM
11.14 <» tl U .
I. .'.I- I. II.. IV 1 I/' k » I
.'.Hi. fn.-i ..jl IVC k « I ',
U.S. Airny emlroniTMnUI Coot
MwdMn Pmha OnxnA MnyMnd
Analytical Results - Soil
Site 21 - Pesticide Shop - Bldgs. 368 A 368F
Schofield Barracks OU 3
Island of Oahu, Hawaii
Figure
2-5
-------
Je-
i' - . '.' Jt' 41
.-..in « :.'
. .VM ;/: j .
' li i .. If ,. !!'
. IUi4 If ,1 . '.
DETAIL
LEGEND
Sol OM Smvto Union
fial Boring LauMon
8
Gwlkuy >
U.S. Arniy EnvlionmwMI Ctnwr
MmtMn PraMng Omm UaoMnd
tniCk«kiCMdiB«ln
E»ll»
(MftlOM)
Form>Onmten«*(lMS.iM4)
MmOnkiOuan
TPIfO ToM
X
(0)
Shoon on I* tour* « » «n«Ma* **
IW ml » aurti pitMnM ti Hut Swfcn 2.1.
SM Rgur* i -4 1 to MMHm el
' ' ' ~ Ui toil l(i«
II.1)
Analytical Results - Soil. Sediment. & Water
Site 26 Car Care Center - Bldg. 80
Schofield Barracks OU 3
Island of Oahu, Hawaii
Figure
2-6
-------
. -.1 J a . -.-
.. t a ..
-.!; f « :
.'I-...« .';
i.,i » 4 ..
'il, » « .:
l V ! '
11.1 j » ii ..'
l ii'ri I a /
' y u ,
! i'... » j .
LEGEND
BoM» Swvto Uxatton
em Boring Uctton
*»
iii
CD
BtamiMnCikiiBi*!
, IMK
T«*
,
KnudMivTtM)
*""»*
bMh
F«no»
o< Fbv)
8knnOnlnPt>i*i*
TPH-O Ti*l ruiiitenn Iliitimilinm
TPHfl
(0)
Sol KM HdkMrt iwvto oono
(nOgnm. pw uogram (ffloAg).
w
-------
N
LEGEND
" I I. 'I'l ,1
i . . IS . » >l
Ml, « CndnmrMnW
riKrmni Tin m nmin
Of / Witor fapmttr or Bui?
saw
Am o« PMMW
-------
'ft. I /.«,..
ft '
,11
Scale In Feet
LEGEND
Soil-Gas Sample Location
(TEQ-H/IMS. 1DB3)
Soil Boring Location
Shallow Soil Sample Location
Building
She Area (IMS, 1994)
Area of Potential Contamination
and Hazardout Waste (IMS, 1994)
TPH-G Total Petroleum Hydrocarbon a Qasollna
Soil sample concentrations hi mUNgrami per
kilogram (mg/kg).
Shown on (file figure are the analytical data
that met the criteria presented In text Section 2.8.
Sea Figure 2-41 for ctofWBons of codes fdcwlng
result*. (Ex.: i "M lu.'.-i -w «( n. . )
Pftpwoten
U.8. Aimy Emtwvmnw Ctrtw
AbtrtMn PIW*IQ Oreund, Mwylwid
Analytical Results - Soil
Site57-Pit3 (1942)
Schofield Barracks OU 3
Island of Oahu, Hawaii
Figure
2-9
-------
T-601C
4
A A
I tillulltlrt
Golf
COUI Go
. 1.4 'J .1 .
'^1 J J II I,)
.«t» a .y
U 4 » U .
' . 4 ''
.i i 'I a ..
Clubhouw
Paikinq1'
Lot
*
LEGEND
cM
Sol Boring Ittafen
L ; j
al MnpM eonGMMIont h
OMS. IM4)
(torn on I* leura tn t» m*** out
DM mi M oMrii pminM m toj taakn M.
M ngura M) to drihHora ol eodM
IMUM. (EH.! UjJ IU>4.|tfu i'i.')
T i T T T f
Pnpndtor..
US. Amy EmlmMnU
AMnlMn Pnvlng Omni, uoylmt
Analytical Results - Soil
Site 59 - Two Trenches - (1942)
Schofield Barracks OU 3
Island of Oahu, Hawaii
Figure
2-10
-------
1..
I *
LEGEND
6hdM» Col tKUJte loom
6H»A/M(IU8, l»<)
Am o» Gun 7 Sol nmtanfcn
(IMS. 1804)
T*x>gn|MoC«ifet 10 '.* it? it ii / )
U 8. Amy EiwtwnwnM C«mr
AbMNn Pm*« Oreund. Mwytond
Analytical Results - Soil
Site 61 Pits and Trenches (1953 -19//)
Scholield Barracks OU 3
Island of Oahu. Hawaii
Figure
2-11
-------
.' it
: I ; .1
t. v .1
' **!.
4
v-n I
.'.'I V
.'1:1 1'
HI) » .-I ! .
' . V ll I
LEGEND
&A^M fiatn^ Lf^^kM
SK Am (IMS. IBM)
Am d MMW
IMt, IM)
(AnoM poM X «rwMn d Ftw)
B Cortgur Um
TPH-O
p«Ukigram(miAg).
n (* Igun m < MMMeU drii
Ml m* t» cnMrk prattnM to M Swion tl
IM F«gura i-41 IviWMIom el codM Mmrfng
U.S. Amy Envtrcnmvtt CvMr
MwdHii Pimng Ornnd. Uoylwd
Analytical Results - Soil
Site 63 -Pits (1962)
Schofleld Barracks OU 3
Island of Oahu. Hawaii
Figure
2-12
-------
N
JY^-
\kf&7
LEGEND
M Boring Loafon
OP*.
ATM ol Pobnoil Cortwn*vlan
at Huanfeui WM» (IMS, 1«B4)
MnlGkMm
pen ti aVKlM al newt
>Un*
TFM-O TaM
T Totem
i. /
'11
iWraltitaflMo
Sot Rain a-41 tor iWMkn ol
| .(
U.S. Aimy EiNlmniMllM CoMM
MontMn Pnvtig Qwund. Uvyttnd
Analytical Results-Soil
Site 648-Pits (1962)
Schoffeld Barracks OU 3
Island of Oahu, Hawaii
Figure
2-13
-------
N
ULyz-t
/\
T-2025
P 1-''
\j »«
Q-369C
tin M>iy,,j imiiip
. ..
;r:::j.;:| T-368 ii;!':'J "
"' OioMrfpump
* '.368AS »4 ;? /*'
* ' . «. C3 «*l
4>^y
fcr>
r
/t
/
'f i 1
i !'.' '( «t '
I . |
PnpwMtor
U.S. Anny EmknnnwnWCirtar
AtetdMn PnMno Omindb UwyHnd
LEGEND
C.3
r)
6hUn> Sol SUM* UwOon
tenbiy S«M> Mwhck
M / WatM 8m«nkic o 8un«
gUndMgmiind Slorapt Tnk
(IMS.
fanrn UmtatgrauM Bk»«g* Twin
(MS.t»4)
renrm Onm tlene* ("S, lew)
BuMcia
^M el Stain / 8ol Utatoatun
t MUwW 8b «« PgM
Ptwtoum.
(MB.1W4)
TPH« ToMPMiO
MOudrx
PCS l**Nav*m»
TCA TlkMBOMtan*
TCC TrtcMnwlMnt
X ToMXytnM
Igui* «f» M ndylbil OM
M ml rn o«M> praMntod ti (HI aMkn J«
SM npura >4i to dMMkra o( BDIIM
- ^ -!.(£».:...,.. i. 1.1 /> .1 ')
Analytical Results - Soil
Site 72B Maintenance Area Bldg. 368
Schofield Barracks OU 3
Island of Oahu, Hawaii
Figure
2-14
-------
LEGEND
AIM ol PMMM
0 HuariM WMW (MS. 1M4)
d RIM)
tkvmOalnl'KMlra
(0) P
Al MB MnvlB OonoOTfevMonv In
6How< on Ml Igw* m « MtMial dMi
tM ml * aMM imtnM to IM C«lon U.
(M Ftgun »-41lor *Mm at axM
' " ' Jfc(Ei.:i. u ii.x -jj « u. )
Golf C
<: 'i * ', fin
1.1.. » * t >'
i M « M ,' (i.)
U.S. Anny EiKtamwrai CBMC
AMidMn PnMig Omni, Uvytond
Analytical Results Soil
Site 73 -Motor Pool (1942)
Schofleld Barracks OU 3
Island of Oahu. Hawaii
Figure
2-15
-------
LEGEND
A SoWJu Swnpto LoccOon
4- Fomwr Drum (IMS. 1994)
(empty, Rusted)
KXMJ Building
Ephonwrel Strrorn
(Arrows point In direction
-------
N
* »
''I
LEGEND
M Bering Union
BUUng
am, i W4)
(D)
«ho«n gn m Igum w* « nwMUl du«
Ml DM f» aMlk pXMrtod to M 8
8« npun J-41 tor ddnwra el «dn
^_..
Pnpndfar.
U.S. Amy fntnamml C«rt*
Analytical Results - Soil
Site 80 Possible Trench (1953)
Schofleld Barracks OU 3
Island of Oahu, Hawaii
Figure
2-17
-------
LEGEND
4-
/:/
f-
i'
11.In uniuM Hd'.i y
i ,'n M in- ' 'i.
I./.,||||-I If.-l W HI' !!
;-<), y « ;.,
I (If K.-t Hill i? Ill' II
759
Soft-Oat Sample Location
Sod Boring Location
Sanitary Sewer Manhole
Budding
Fence
Open Drainage Ditch
(Arrows point In direction of Row)
Storm Drain Inlet
Storm Drain Pipeline
Sewer Pfpetlna
(D) Field Duplicate
Sol! wimple concentrations In milligrams
per kilogram (mg/kg).
Shown on this figure an) the analytical data
that met the criteria promoted In t**t Section 2.0.
See Figure 2-41 (or definitions of codes
followingresults.(Ex.: « ",i-. ,/: w ,,.)
Scale hi Feet
U<8< winy
AlwrdMn Proving Onwnd, Mvytand
Analytical Results Soil
Site 81B - Industrial Operations - Bldg. 7M
Barracks OU 3
Island of Oahu, Hawaii
Fiqure
-------
V
1081
Scale In Feet
LEGEND
Soft Oaa Sample Location
Soil Boring Location
Sanitary Sewer Manhole
Building
Fence
Open Drainage OHch
(Arrows point In direction of Flow)
Sewer Pipeline
U,8.
AtxrtMn Pim
-------
HUSf
f Ornwf Fu«l U4ttpunM(ir Uland
1-6 ;
'.14 it
>l< I V
'.I J <
fn^nttlor.
U.S. Anny EmtonmnM Cvttt
AIMTDMA Prwtig Omm, Uwyfend
LEGEND
A MKteBmcto
Sol Bering loam
01 / W*H hpMW «f Sump
bwmg Own tkn^ (IM*. it»4)
Fonmr Onn Skngt (MO, ItM)
Fern* fv* Dk(MnM> (Mt, 1W4)
ol Hov)
IMiU*
KX
0*
(M.1H4)
OH. Md UMotnM
fitnm «n n> Ion m *» VMMIOM din
Mmtf M wMrk praMnkd H (ul MOon fl.
fa* Rput Ml to iWMow d ood«
" ' -l(El.:M,,l II. W l» M I, .')
Analytical Results - Soil
Site 86 - Maintenance Area BMg. 2138
Schofield Barracks OU 3
Island of Oahu, Hawaii
Figure
2-20
-------
HM :'
'in i :)
.v-
LEGEND
45445
Soil Gas Sample Location
Soil Boring Location
Building
Area of Stain / Soil Discoloration
(IMS, 1004)
Fence
(0) Field DupDcato
Soil sample concentrations In milligrams
per kilogram (mo/kg).
Shown on this figure are the analytical data
that met the criteria printed In text Section 2.0.
See Figure 2-41 for definitions of codes
following results. (Ex.: i ' ">'i m o «'y » u.;1)
| l«ur |UI. M." ' V
Ml .'* ' '.)' Ml:
; > <, :t U ').\,
I I- t, I* '.TI' (II
! 'i((|. V " I'1.:-
i l'.l|.|l.-| I-I. ' 'I')' '.I1-
I Vonndluri -I'ill i' '.).'_>' (|i<
Scale In Feet
U.8. Afnry Ei ivfcu vTMnttl Cinlw
n PrevHo Qnund. Mvyknd
Analytical Results Soil Site 90 -
Motor Pool (1959-1969) and Dark Stains (1970)
Schofleld Barracks OU 3
Island of Oahu, Hawaii
Figure
2-21
-------
i ..|M.,.|ll|ll. '.H'.l I"' II, (I-
Seal*' r«»et
LEGEND
A Son-Gas Sample Location
SoH Boring Location
|4318| Building
Area of Slain / Soil Discoloration
(IMS, 1994)
X Fence
(D) FWd Dupnott
Son sample concentrations In mHltgrams
par Mtogram (moAg).
Shown on this figure are the analytical data
that met the criteria presented In text Section 2.8.
See Figure 2-41 tor deflnNIona of codes
following results. (Bc.:i-i i ni.'.-! tiy «t n ..)
Pnpiradtor
U.S. Amqr fmtrorrnfrfal OnMr
Mwntoan Pnwlng Qnund. Mvykmd
Analytical Poults - Soil - Site 93 Ofwt Fire (1951)
and Open Storage / Light Material / Dark Stains (1955)
Schofleld Barracks OU 3
Island of Oahu, Hawaii
Figure
2-22
-------
N
LEGEND
-'A
SMtoinFMt
U.a Airry EiMmnrmnu) C«rt»f
ManMn Piovtif OrauA IMyUM
SlMlmi Sol BmpK Uaftn
t)
"
OnMMongi(»M.lM4)
«**
ol F)M4
Mxn Drain Ftprfrx
(Wt,1«M)
Pmtenv OM. OKI UlMEMM
OU8.1M)
TPHO
TPKO
pwMonnmdKtM.
GlioiM on Nt l^m
-------
N
'*
(\r \
Site U A
LEGEND
LJ
n
UMtogmmiSkx
(Ckyttn, 1
gl RM)
(0)
»<*«n<««am«rt««rniminrv»r»»«r»»h
iwUagiwKingA*.
m»mMM
»«inkdkibs
U.S. Amy emkanwM CvMr
ODinHin Proiitx) Oroinrt tljtyni
Analytical Results - Soil & Sediment
Site B Maintenance Area - Bldg. 940
Schofteld Barracks OU 3
Island of Oahu. Hawaii
I Figure
2-24
-------
A.
DETAIL A
LEGEND
".».
i
BuMlnFM
H
t)
,:i
E3
loin Drain P«)*»
IIMSP
TWO
PCe
TCC
ID)
8dl (MM*!
(M. IBM)
» tuna* POM (MB, t MM)
on Mi tgura M » a/MyMt
-------
N
MMbP
' t'Mll
I .1 ' I : 1-
'. . >> It
. * -I '
.'.i ' .t:< M ..:
.: I. '. J I .
.1 ' 1 »'! '. I i
. .1 : II I
U.S. Aim, EmfconmvU C««»
LEGEND
bl Ot/WMMSminlDroiBump
C3 EiMn
(IM8.1
f E4*ngOnmSUi*|i(IU8.IM4|
0_
"968 1
HMSP HUM
IHX P*oMun.Ok.»ndLiArtu>iai
PoM (lua IW4|
TPHO ToW
PC6 T
ID)
Mind MO*
SnoM on M. l»n m nxntfylul dttt
HIM tw gnwk pnnrtK) MIM MOtol U.
. )
Analytical Results So!) and Sediment
Site D - Maintenance Area - Bldq. 966
Schofleld Barracks OU 3
Island of Oahu. Hawaii
Figure
2-26
-------
N
A
ra
, AIM
^ (1U3. IMl|
SSI-
y,
^ SiWv
/ v*>\
cut.
i" I
V,, i
, ^
H» ^!
,»l
I' I
pa
BoitolnFM
LEGEND
i ft*Gu SHI** loafed
Sol tort? Lauiun
H
BMt
QpnOMnatOloIi
(AnsM portji okMbnal now)
Sum Onto P*»ft»
SSC
TPKMJ
TFHO ToMPMM
I
OCA
T T
TCE
X
ID)
(MttBM)
(lilllll 8Kx»a»PoM(IU3.1884)
Bal «nd
StioMi on Ni Igw* o
-------
,'. I.' » . '
HC». '
LEGEND
0 hftraWaui Ban** Unfed
ta*n«*fen«*UaUan
M OI/WiMrhpinlvBGump
..;i tomOttinUoiiBMh
U
tt«T"
IMSP
SSP
(O)
(M.IIXM)
Show en m Ion m n* MM^I *k
««l mM IK MM! inMrtrt tiw taflon M.
ngun t-41 tor drtMom gl COM
" .:i....l K.I. «».:.)
Analytical Results (metals) - Soil. Sediment, & Water
Site E Maintenance Area Bldg. 9B6
Scholield Barracks OU 3
Island of Oahu, Hawaii
I Figure
2-28
-------
N
UdtlBiy Sloiaud Area
(Sim 83)
LEGEND
*»
Burin Witt SMI* Uttfen
fc)
LJ m.
E1080 I BuMng
OpwOmrua
(ATOM poMin
ol Fkw)
HU«I<|DU> UMtfW Siongi
(IU3,19M)
rmo Town
(0)
MAI?* eonwMoM In mknv«M
enow Baton 2 1.
&M Flflu.. 1-4 1 to oMMlom a tan*
'
o a M 100 iwapo
^^^^^^^^^iHM^^^^^^
PnpvMlon
Ui
MwdHn Prolnj Qraund. MoytoM
Analytical Results Soil. Sediment, & Water
Site H - Maintenance Area - Bldg. 1080
Schofleld Barracks OU 3
Island of Oahu, Hawaii
Figure
2-29
-------
N
«
'5 i:
1
5115
.
fl>
o '
1
;u
..V)
Si
1120 :i ,.
-US ,''
|.j '.* ^i-VVi-..;.. ,,-( -;-;-;£
:.. v! 4« '», -VI.-; N23A -" ' j^ W
1,11' ''' rill / ' 'i'" T';"i
l-iMHlM UlWM lUKj HMMly
.'Hi « < : : '
.-!) a ii . :.'
:--M ft 41 '^ -
LEGEND
ShWM Bo« tenpto LnoMton
a*anrntS^a»iaxt!t>
-LJ
Him it rn»
-------
4>
""" ^'ii* ..
. . . i ?. i j . .
. . > a : .
,,':'"...
,,..,,.
4
": i'.'.
H *f t * " -'
v.sj;-- *
.'<-. . g
.1*1:.
;-«'; j
. .1 .'/' « ; .
; : f/( m -i , . ri
LEGEND
IIMSf '
HBOF
012
Vuhiclu Scrap
Yurd . ,
a.
ftnct
ilnegm g( Rgv)
HOC
SSf
.
(». imi
*~ ~ L[- -^^. (-.- ^.j
' lt.llllil,j [ , ,(;|l
.....;/ > .1 I
' \
:_.!: ./ J ; . , .
1,. H 4 1 < ' ' /
.1 '. H../ .(
i ,.|i- IM >l ..
Ml il i .'
141 .1 . '!., ' '
lol .>naiMillgu» i \ If- f ,( i _.
» ' ,1'i-i /r« J »' . i
»:; "«!;.
. . .1 ':. rf < .
1 ; : . fc-M.)
1 Analytical Results Soil & Sediment
Y, pnoMdkr ate J- Maintenance Area -BkJg. 1180
Island of Oahu, Hawaii
Rgure
2-31
-------
Wutli lta.J>
(No) ti UM)
l/'t. |
.;. /
:; '( .< i j
', ':'! I . I
.'1 4 i
i -t : . |
;./'V ' '
» ' " '.! ii;
I
\
I
HMSH
\
A * t
!.>».
I I. ! )
1 .1
i ,i
i J ii
\
\ »»-<-.-Vf
. HHKM1 US
\ fffl' 1609 T
\. .i?U&v .' .^?d^'\ \
V 1: $' ^ \
*' T \ V-\
rf -]/'-
\ :-.! WOW :, V,' .\
* liiiri
Foniw Wut> Kick
(IMS. IWH)
I ' A )'
I ' < -I
. . . f
.MINI 7 «l '.
.1. Hi Jl t I
- il a V
Pnpmttor.
U ». Am« EmtanTwM CM*
PraMng Oraund. Uoyknd
LEGEND
ttalM Sol 6m«<> Loafcn
M
y 8urtM*WilH4kdlrmrt
CJ
HHMI Onn PfplAW
IIMSP
1-01
SSP
TPH-0
TPH-0
TPM-O
ice
(0)
(Ml, IBM)
lv
4)
Sung, hm qua. <9M)
MrotMlv Ok, Md UMcMi
(MB.1W4)
mHgnm pv Uograffl (mg*g)
W>MMHvl> axankMam ki nfcrayrani*
Showi M Ni tarn « M
Analytical Results - Soil, Sediment. & Water
Site K Maintenance Area - Bldg. 1611
Scnofield Barracks OU 3
Island of Oahu, Hawaii
Figure
2-32
-------
N
i . /;-. >t :
' f / *J
! . . ., .1 , ., ;
i.. t i ' .
. / .1 i -'
:* I d .
. rt -t i
l !.»....
* r \
rsT-A'«..L??'
»»...,', .4
'4
1625
HUOf
'.»
I I
LEGEND
StalM Sol taipb UMtn
SvllmnBwvtoUxiMon
twtaiy 8iM»r UwM*
01 / WU» Stpmtof a Suip
Storm Oraki Cacti Butt
U
0
E4*ng mMkal MI
Xd m W OMrtt praHrMd In Ud team M.
SototiFM
S«*FI»na-'l
"Mil- \ LJ
U.S. Aim* Cmlmiwul Otx
AtMANii Pnvme Onunt, Itaiyttnd
Analytical Results Soil and Sediment
Site L - Maintenance Area - Bldg. 1621
Schofield Barracks OU 3
Island of Oahu. Hawaii
Figure
2-33
-------
/ - ' ,
LEGEND
A Bo»4>w6«l«*iUMHn
Oot BortriQ LfioMon
'','''", ."ri-V'. ' i'Ji' ' " ShOMiolBxMiLagagn
to«mMSM|iMUa«n
W OKWtUlSWMMMMtulV
.ill Sum Onto CM* B«h
^4
IIMSP
. SS>-
l'iUlJil «"*««»
l«USP HUMtfow IMMM SUHM PoM
PM.1W4)
P*«toim,
OU8.19M
Sbf
TPHO Tol«P>
TWO TeMPiMiuraHyd
(0)
8« ind MdmM Mnvto oorxanuukin* ki
IM KM tuoMril »«««« »iL«Mali» I.I,
U.S. Amy EmkwUMiM Coor
Analytical Results - Soil, Sediment, & Water
Slle 0 - Maintenance Area Bldg. 2400
Schofleld Barracks OU 3
Island of Oahu, Hawaii
Figure
2-34
-------
LEGEND
8o»UMdun
Sol Boring Ucuttn
fiteto* Col fan** Uafcn
SwnpWUcrilun
SKxmOntaCittiauh
gUmfcignM* Skngi Tink
rt RM)
OMB. 19M)
PttdMH, OK «nd UMm*
pSTTSfl,
TPH4
TTHO
TPHO
TCG
ID) FMtDupioU*
Bat tn)
*!«»« on Hi Igun in I
(Ml ml » MM! (OMMlM h Mtf 6«a»n «t.
t
US AmyEfWtonrnMiWfenfcr
OBiiomi Pmtog Oreunq Miiy*»id
Analytical Results - Soil, Sediment. & Water
Site P - Maintenance Area - Bldg. 2420
Schofield Barracks OU 3
Island ot Oahu, Hawaii
Figure
2-35
-------
-
*' :*
' *~"lJ 2449 ]"
UA Am* Emfcwviwrttl teMr
AbMto«i Pfovk^ OioundL Uwyto
LEGEND
4 Su*O*a Swi^to umdon
BolBatlpLmftxi
tt Bhrto«6olB«T»)i.L«aton
WMM Smpfc Loalon
DtdtaMrt 8«Ml» Ualbn
a HO.)
u
8
I1MSP
It*
TPH-0
TCE
(0)
NS
Storm OrMnP»)«*i»
SwwPtMln*
Sofl «nd Mdnwrtf Mrqpl* cano«nlfaAan« h
mflojrwnt par Utoyram (noAia)-
W«Mr Mmpk oonoMnOan to ir*.cgr«m
n an m§ I0un m i
iw IMI « MM> pnMTMd h tod teaton 2.1.
|Bt:,. ,., n M -a -., .. )
Analytical Results - Soil. Sediment, & Water
Site R Maintenance Area - Bldg. 2460
Schofiald Barracks OU 3
Island of Oahu, Hawaii
Figure
2-36
-------
N
i
2486-
uQO Slud
^
!..:;) ./r * i
;l o i '
.: : i ' T >l
. . i n - .- A- M '
I . '"I ['. T *l
) II". .,( I
US
PfMng Omnd. Uoyttnd
LEGEND
A SoMuSunptoUuftn
lilil WMHtek
Uttl
Nnm
Bonn DrainOuM/lnM
iiMSP HU*MgMlW«Meion«>
t>£p !«* Binna. ram (ma i«4|
TFHO TcW
TPHO ToW
I
T T.
TCC
X
(0)
Sol ind MdknM Hnpto onaM
Wain l»i»<» aanuntaWM In mtov«ni»
PMMM(HI'I)-
Winn on « «gin in *» mtflat dM
(&-!,. hi IC.H « U li .')
Analytical Results - Soil, Sediment. & Water
Site S - Maintenance Area - Bldg. 2480
Schofleld Barracks OU 3
Island of Oahu, Hawaii
Figure
2-37
-------
l-Ot ANU riHE SlOIWUt
2601
1
i
"l't-1
' s
2606
« ,:.
y « M .fO T MO
LEGEND
M
, :i
CJ
Sal a«|4>
Storm 6«MrUintaU
StdmiM ttnvto Locukn
Oi / W«ur f^iirau ac tunp
Sum Drain CWMIw.>
I>nk
Mdng
6'iilliililfi " «-
*Klon J Fto.)
Harm OKI OuW/lnM
(MB.1MM)
MiHrt.1 gmigt Pert
THfO
(D)
Sai M
ftn and MdtiMnwnO DonownkiM to
KIOMI on n> 10m *n IK mMort
-------
Scale hi Feet
J2626J
U
IIMSP
LEGEND
Soil-Gas Sample Location
Shallow ?wi Sample Location
Drum Storage (IMS. 1994)
Building
Area of Stain / Soil Discoloration
(IMS, 1094)
Existing Gmise Rack
Fence
Open Drainage Ditch
(Arrows point n direction of Flow)
Storm Drain Pipeline
Hazardous Material Storage Point
(IMS. 1094)
(D) Raid Duplicate
Sofl sample concentniHoon In milligrams
per WJogram (mg/kg).
Shown on this flgure are the analytical data
that met the criteria presented In text £>vflon 2.8.
See Figure 2-41 for definitions of codes
following result*. (Ex.:i , .Mi i"'i 'iv »',.)
U.S. Aimjf Env1inrfT*»uittu Contor
MMnlMfi Pnwtno Qmund, Mvytand
Analytical Results - Soil
Site V Maintenance Area - Bldg. 2620
Schofleld Barracks OU 3
Island of Oahu, Hawaii
Figure
2-39
-------
4
! I I I 4.11
//
w/r«-
' * > ':
/-, i'«
/IK/ iiirwi. /
J^ A V
'«V-.,
pa
i'»i'l
T *p f T T T*
U.S. Amy En«ln>ni«nM CMIM
MwlMn PreMng Oiouid, UvyMna
LEGEND
Sol Boring Lacunn
(AN. IBM)
FonM(FuolOhp«lM>(M8.IO»l)
Mkwi
fflMgmmpw Mogram !«*«).
Stewi on Mi Igun » M iMMIeil «M*
M CM) ti* crUfH pnonM M iul BMMn >.!.
F^tn 2-41 to> d^MUora d eak*
Analytical ResuHs Soil and Sediment
Site W - Maintenance Area Bldg. 2640
Schofield Barracks OU 3
Island of Oahu, Hawaii
Figure
2-40
-------
Flagging Coder.
B
C
D .
//
JP
JX
K
U
X
9
Data Qualifier
/
J
K
M
N
P
R
'!&''*;.. ;-Exi^*l^itM>n^^fc .
':'.'zV- . ' " ' "-*.-- -i ,' --*.''"**'
Analyte found in the method blank or QC blank as well as
in the field sample.
Analysis was confirmed.
Duplicate analysis.
Value is estimated; interferences in sample make
quantitation and/or identification suspect.
Value is estimated; result is less than reporting limit but
greater than the instrument1 s detection limit.,
Value is estimated; analyte recovery is outside of certified
range but within acceptable limits.
Reported results are affected by interferences or high
background.
Analysis is unconfirmed.
Analyte recovery is outside of certified range but within
acceptable limits.
Non-demonstrated/validated method performed for USAEC.
Explanation
The low-spike recovery is high.
The low-spike recovery is low.
Missed holding time for extraction and preparation.
The high-spike recovery is high.
The high-spike recovery is low.
High-spike recoveries were excessively different.
Data is rejected.
Prepared for Explanation of Flagging Codes and Data
U.S. Army Environmental Center Qualifiers
Aberdeen Proving Ground, Maryland
Schofield Barracks OU 3 Figure 2-41
Island of Oahu, Hawaii
-------
TABLES
-------
Table 2-1
Summary of Concentration Ranges
for Pesticides in Soil/Sediment-1995, Site 21
Schofield Barracks, Operable Unit 3
Analyte
Range of
Concentrations1
(mg/kg)
alpha-benzene hexachloride
alpha-chlordane
endosulfan I
aldrin
0.000943 - < 0.002
< 0.002 0.21
< 0.002
0.000501 - 0.00644
beta-benzene hexachloride
endosulfan II
delta-benzene hexachloride
dieldrin
0.000427 - < 0.002'
0.000694 - < 0.002
< 0.002
0.000405 - 0.47
endrin
endrin aldehyde
endosulfan sulfate
gamma-chlordane
< 0.002
0.000802-0.0245
0.00122 - 0.00446
< 0.002 - 0.24
heptachlor
heptachlor epoxide
lindane
methoxychlor
0.00112-0.00319
0.00112-0.0222
0.000617-0.00801
0.00561 - < 0.02
aroclor 1016
aroclor 1221
aroclor 1232
aroclor 1242
<0.02
<0.02
<0.02
<0.02
aroclor 1248
aroclor 1254
aroclor 1260
rhothane
<0.02
<0.02
<0.02
0.000483-0.38
2,2-bis(p-chlorophenyl)-l,l-dichloroethene
2,2-bis(p-chlorophenyl)-l,l,l-trichloroethane
toxaphene
0.000793 - 0.58
0.00141-0.69
Notes
mg/kg is an abbreviation for milligrams per kilogram
' Range of analyte concentrations reported for samples from lowest reported
concentration or method detection limit to highest reported concentration
or method detection limit. Where no concentration was reported, only the highest
method detection limit is listed.
: Range includes concentrations reported by the laboratory that were less than the
method detection limit.
DRTAB:.I.XLS
4/30/968:57 AM
Page 1 of 1
-------
Table 2-2
Concentration Ranges for Organic Compounds
Detected in Soil/Sediment -1995'
Schofield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Analyte
ToUl Petroleum Hydrocarbons
Gasoline
Diesel
Volatile Organic Compounds
Methylene chloride
Acetone
Carbon disulfide
Chloroform
1 ,2-Dichloroethane
2-Butanone
Trichloroethene
Benzene
1 ,1 ,2-Trichloroethane
2-Hexanone
Tetrachloroethene
1 , 1 ,2,2-Tetrachloroethane
Toluene
Ethyl benzene
4-Methyl-2-pentanone
Total Xylenes
Semi-Volatile Organic Compounds
4-Methylphenol
Isophorone
Naphthalene
2-Methvlnaphthalene
Dimethyl phthalate
Acenaphthene
Dibenzofuran
Fluorene
Diethyl phthalate
Phenanthrene
Anthracene
Di-n-butyl phthalate
Fluoranthene
Pyrene
Butyl benzyl phthalate
Chrysene
Benzo(a )anthracene
bis(2-Ethylhexyl)phtha!ate
Di-n-octyl phthalate
Benzo(k)fluoranthene
Benzo(a)pyrene
Benzo(e,h,i)pervlene
Site 26
<20
<10-1780
0.00078 - <0.01 2
0.017-0.048
<0.01
<0.01
<0.01
<6.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
0.0011 - <0.01
<0.01
0.0017 - 0.01
<0.33
<0.33
<0.66
<0.33
<0.33
<0.66
<0.33
<0.33
<0.33
<0.33
<0.33
0.0316 - <0.33
<0.66
<0.33
<0.33
<0.33
<0.33
<0.33 - 0.503
<0.33
<0.33
<0.66
<0.33
Site 35
<1 - 261
<10-1450
0.00072 - <0.01 3
0.018 - 0.5
0.0028 - <0.01 :
<0.01
<0.01
<0.01 - 0.093
<0.01 -
<0.01
<0.01
<0.01
0.00094 - <0.01 '
<0.01
<0.01
<0.01
<0.01
<0.01
<0.33
<0.33
<0.66
<0.33
<0.33
<0.66
<0.33
<0.33
<0.33
0.106 - <0.33
0.111-<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
Site 46
-------
Table 2-2
Concentration Ranges for Organic Compounds
Detected in Soil/Sediment - 1995 l
Schofield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Analyte
Total Petroleum Hydrocarbons
Gasoline
Diesel
Volatile Organic Compounds
Methylene chloride
Acetone
Carbon disulfide
Chloroform
1,2-Dichloroethane
2-Butanone
Trichloroethene
Benzene
1 ,1 ,2-Trichloroethane
2-Hexanone
Tetrachloroethene
1 , 1 ,2,2-Tetrachloroethane
Toluene
Ethyl benzene
4-Methyl-2-pentanone
Total Xylenes
Semi-Volatile Organic Compounds
4-Methylphenol
Isophorone
Naphthalene
2-Methylnaphthalene
Dimethyl phthalate
Acenaphthene
Dibenzofuran
Fluorene
Diethyl phthalate
Phenanthrene
Anthracene
Di-n-butyl phthalate
Fluoranthene
Pyrene
Butyl benzyl phthalate
Chrysene
Benzo(a )anthracene
bis(2-Ethylhexyl)phthalate
Di-n-octyl phthalate
Benzo(k)fluoranthene
Benzo(a)pyrene
Benzo(g,h,i)pervlene
Site 59
<20
<20
0.0016
<0.02
<0.01
<0.01
<0.01
-------
Table 2-2
Concentration Ranges for Organic Compounds
Detected in Soil/Sediment 1995'
Schofield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Analyte
Total Petroleum Hydrocarbons
Gasoline
Diesel
Volatile Organic Compounds
Methylene chloride
Acetone
Carbon disulhde
Chloroform
1 ,2-Dichloroethane
2-Butanone
Trich loroethene
Benzene
1 , 1 ,2-Trichloroethane
2-Hexanone
Tetrachloroethene
1 ,1 ,2,2-Tetrachloroethane
Toluene
Ethyl benzene
4-Methyl-2-pentanone
Total Xylenes
Semi-Volatile Organic Compounds
4-Methylphenol
Isophorone
Naphthalene
2-Methylnaphthalene
Dimethyl phthalate
Acenaphthene
Dibenzofuran
Fluorene
Diethyl phthalate
Phenanthrene
Anthracene
Di-n-butvl phthalate
Fluoranthene
Pyrene
Butyl benzyl phthalate
Chrvsene
Benzo(a)anthracene
bis(2-Ethylhexyl)phthalate
Di-n-octyl phthalate
Benzo(k)fluoranthene
Benzo(a)pyrene
Benzo(g,h,i)pervlene
Site 72B
<20 - 132
10-253
0.0017-0.18
<0.02
<0.01
<0.01
<0.01
<0.01
0.00096 - 02
<0.01
0.00064 - <0.01 '
<0.01
0.00049 - <0.01 2
0.0012 - 5.9
0.00045 - <0.01
<0.01
<0.01
0.001 - <0.01 '
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
0.0114-<0.33:
<0.33
<0.33
<0.33
<0.33
<0.33
0.0296 - <0.33
<0.33
<0.33
<0.33
<0.33
Site 73
<20
<20 .
<0.01
<0.02
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
Site 80
<20
<20
0.0016 - 0.0018.
<0.02
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33 .
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
Site 81B
<20
<20
<0.01
<0.02
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.66
<0.66
<0.66
<0.66
<0.66
<0:66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
0.0158 - <0.66
<0.66
<0.66
<0.66
<0.66
DRTAB:.; XLS
4/30'OpfOI AM
Page 3 of 9
-------
Table 2-2
Concentration Ranges for Organic Compounds
Detected in Soil/Sediment -1995'
Schofield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Analyte
FoUl Petroleum Hydrocarbons
Gasoline
Diesel
Volatile Organic Compounds
Methylene chloride
Acetone
Carbon disulfide
Chloroform
1,2-Dichloroethane
2-Butanone
Trichloroethene
Benzene
1,1,2-Trichloroethane
2-Hexanone
Tetrachloroethene
1,1,2,2-Tetrachloroethane
Toluene
Ethyl benzene
4- Methy 1-2-pentanone
Total Xylenes
Semi-Volatile Organic Compounds
4-Methylphenol
Isophorone
Naphthalene
2-Methylnaphthalene
Dimethyl phthalate
Acenaphthene
Dibenzofuran
Fluorene
Diethyl phthalate
Phenanthrene
Anthracene
Di-n-butvl phthalate
Fluoranthene
Pyrene
Butyl benzyl phthalate
Chrysene
Benzo(a )anthracene
bis(2-Ethylhexyl)phthalate
Di-n-octyl phthalate
Benzo(k)fluoranthene
Benzo(a)pyrene
Benzo(g,h,i)pervlene
Site 83
<20
<20
nr
nr
<0.01
<0.01
<0.01
"nr
<0.01
<0.01
<0.01
nr
<0.01
<0.01
<0.01
<0.01
nr
<0.01
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33 .
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
Site 88
<20
<20 .
0.0017 - 0.0022
<0.02
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
0.00246 - <0.66
<0.66
<0.66
0.00554 - <0.66 '
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
Site 90
<20
<20
<0.01
<0.02
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
Site 93
<20
<20
<0.01
<0.02
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
DRTAB:.:.XLS
4/30/4K9.01 AM
Page 4 of 9
-------
Table 2-2
Concentration Ranges for Organic Compounds
Detected in Soil/Sediment -1995'
Schofield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Analyte
FoUl Petroleum Hydrocarbons
Gasoline
Diesel
Volatile Organic Compounds
Methylene chloride
Acetone
Carbon disulfide
Chloroform
1 ,2-Dichloroethane
2-Butanone
Trichloroethene
Benzene
1,1,2-Trichloroethane
2-Hexanone
Tetrachloroethene
1 ,1 ,2,2-Tetrachloroethane
Toluene
Ethyl benzene
4-Methyl-2-pentanone
T<5tal Xylenes
Semi-Volatile Organic Compounds
4-Methylphenol
Isophorone
Naphthalene
2-Methvlnaphthalene
Dimethyl phthalate
Acenaphthene
Dibenzofuran
Fluorene
Diethyl phthalate
Phenanthrene
Anthracene
Di-n-butvl phthalate
Fluoranthene
Pyrene
Butyl benzyl phthalate
Chrvsene
Benzo(a)anthracene
bis(2-Ethylhexyl)phthalate
Di-n-octyl phthalate
Benzo( k) fl uoranthene
Benzo(a)pyrene
Benzo(g,h,i)pervlene
SiteB
<20-93
15-121
nr
nr
<0.01
<0.01
<0.01
hr
<0.01
<0.01
<0.01
nr
<0.01
<0.01
<0.01
<0.01
nr
<0.01
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
0.06 - <0.33 '
<0.33
0.0917 - <0.33
0.0131 - <0.33
<0.33
<0.33
0.001 58 -<0.332
<0.33
<0.33
0.0241 - 0.774
<0.33
<0.33
<0.33
<0.33
SiteC
<20
<10 - 291
0.00082 - <0.01 2
<0.02
<0.01
<0.01
<0.01
<0.01
0.00096 - <0.01
<0.01
<0.01
<0.01
0.00062 - <0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
0.072 - <0.33 J
<0.66
<0.66
<0.66
<0.66
<0.66
<0.33 - 4.16
<0.33-1.38
<0.66
<0.66
<0.66
SiteD
<20
<10 - 3750
0.00068 -<0.01;
<0.02 - 0.024
0.0007 - <0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
0.00069 - <0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.33
<0.33
<0.66
<0.33
<0.33
<0.66
<0.33
<0.33
<0.33
<0.33
<0.33
0.0162 - <0.33
0.1 - <0.66
<0.33
<0.33
0.1 - <0.33
<0.33
0.0166 - 8
<0.33 - 2
<0.33
0.086 - <0.66
0.3 - <0.33
SiteE
<1-7200
<10- 19000
0.0017-0.0018
<0.02 - 8.9
0.0032 - <0.01
<0.01
<0.01 - 2
<0.01 - 0.016
<0.01 - 20
<0.01 - 100
<0.01
<0.01
<0.01
<0.01
<0.01 - 2000
<0.01 - 700
<0.01
<0.01 - 8000
<0.66
0.0136-<0.66:
<0.33 - 80
<0.33 - 60
<0.66
<0.66
0.05 - <0.66
<0.33 - 0.72
0.00102 - <0.66
<0.33-1.4
0.16 - <0.66 :
0.00848 - <0.66 :
0.119-<0.66'
0.0794 - <0.66 :
0.026 - <0.66 :
0.026 - <0.66 !
0.026 - <0.66
<0.33-1.1
<0.66
<0.66
0.0196-<0.66
0.059 - <0.66 '
DRTAB:.: XLS
1 AM
Page 5 of 9
-------
Table 2-2
Concentration Ranges for Organic Compounds
Detected in Soil/Sediment -1995'
Schofield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Analyte
Total Petroleum Hydrocarbons
Gasoline
Diesel
Volatile Organic Compounds
Methylene chloride
Acetone
Carbon disulfide
Chloroform
1,2-Dichloroethane
2-Butanone
Trichloroethene
Benzene
1,1,2-Trichloroethane
2-Hexanone
Tetrachloroethene
1 ,1 ,2,2-Tetrachloroethane
Toluene
Ethyl benzene
4-Methyl-2-pentanone
Total Xylenes
Semi-Volatile Organic Compounds
4-Methylphenol
Isophorone
Naphthalene
2-Methvlnaphthalene
Dimethyl phthalate
Acenaphthene
Dibenzofuran
Fluorene
Diethyl phthalate
Phenanthrene
Anthracene
Di-n-butvl phthalate
Fluoranthene
Pyrene
Butyl benzyl phthalate
Chrvsene
Benzo(a)anthracene
bis(2-Ethylhexyl)phthalate
Di-n-octyl phthalate
Benzo(k)fluoranthene
Benzo(a)pyrene
Benzo(g,h,i)pervlene
SiteH
<20
<10-218
0.0016-0.002
<0.02-0.11
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.66
<0.66
<0.66
<0.66
0.0495 - <0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
0.066 - <0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.33 - 28.4
<0.66
<0.66
<0.66
<0.66
Site I
-------
Table 2-2
Concentration Ranges for Organic Compounds
Detected in Soil/Sediment 1995'
Schof ield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Analyte
ToUl Petroleum Hydrocarbons
Gasoline
Diesel
Volatile Organic Compounds
Methylene chloride
Acetone
Carbon disulfide
Chloroform
1,2-Dichloroethane
2-Butanone
Trichloroethene
Benzene
1 ,1 ,2-Trichloroethane
2-Hexanone
Tetrachloroethene
1,1,2,2-Tetrachloroethane
Toluene
Ethyl benzene
4-Methyl-2-pentanone
Total Xylenes
Semi-Volatile Organic Compounds
4-Methylphenol
Isophorone
Naphthalene
2-Methvlnaphthalene
Dimethyl phthalate
Acenaphthene
Dibenzofuran
Fluorene
Diethyl phthalate
Phenanthrene
Anthracene
Di-n-butyl phthalate
Fluoranthene
Pyrene
Butvl benzyl phthalate
Chrvsene
Benzo(a (anthracene
bis(2-Ethylhexyl)phthalate
Di-n-octyl phthalate
Benzo(k)fluoranthene
Benzo(a)pyrene
Benzo(g,h,i )pervlene
SiteL
0.376 - <20 :
<10 - 51
<0.01
0.017 -<0.02
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01 - 0.014
<0.01
<0.01
<0.01
<0.01
0.0011-0.073
<0.01 - 0.02
<0.01
<0.01 - 0.056
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
0.0336 -<0.332
<0.33
<0.33
0.0683 - <0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
SiteO
<1-51
<10-246
<0.01
<0.02 - 0.2
0.0071 - <0.01
<0.01
<0.01
<0.01 - 0.048
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
0.00067 - <0.01
<0.01
<0.01
<0.01
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
0.00238 - <0.66 2
0.13 - <0.66 '
<0.66
<0.66
0.078 - <0.66
<0.66
0.2 - 0.7459
<0.66
<0.66
0.046 - <0.66 -
<0.66
SiteP*
<20
<10-197
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
0.0022 - <0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
0.082 - <0.66 !
0.17 - <0.66
<0.66
<0.66
0.087 - <0.66
0.002 - <0.66
0.22 - <0.66 :
<0.66
<0.66
0.014 - <0.66
<0.66
SiteR
<20
<10-56
<0.01
<0.02 - 0.18
<0.01
<0.01
<0.01
<0.01 - 0.024
0.00071 - <0.01 "
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
0.057 - <0.66 :
<0.66
<0.66
<0.66
<0.66
<0.66
0.082 - <0.66 :
<0.66
<0.66
<0.66
<0.66
DRTAB:.:.XLS
J/30/9t'<»OI AM
Page 7 of 9
-------
Table 2-2
Concentration Ranges for Organic Compounds
Detected in Soil/Sediment -1995'
Schofield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Analyte
Total Petroleum Hydrocarbons
Gasoline
Diesel
Volatile Organic Compounds
Methylene chloride
Acetone
Carbon disulfide
Chloroform
1 ,2-Dichloroethane
2-Butanone
Trichloroethene
Benzene
1,1,2-Trichloroethane
2-Hexanone
Tetrachloroethene
1 , 1 ,2,2-Tetrachloroethane
Toluene
Ethyl benzene
4-Methyl-2-pentanone
Total Xylenes
Semi-Volatile Organic Compounds
4-Methylphenol
Isophorone
Naphthalene
2-Methvlnaphthalene
Dimethyl phthalate
Acenaphthene
Dibenzofuran
Fluorene
Diethyl phthalate
Phenanthrene
Anthracene
Di-n-butvl phthalate
Fluor ant hene
Pyrene
Butyl benzyl phthalate
Chrvsene
Benzo(a)anthracene
bis(2-Ethylhexyl)phthalate
Di-n-ocryl phthalate
Benzo(k)fluoranthene
Benzo(a)pyrene
Benzo(g,h,i)pervlene
SiteS
<1 - 3945
<10-1800
0.0007 -<0.01!
<0.02 - 0.23
<0.01
<0.01
<0.01
<0.01 - 0.026
0.00091 - <0.01 !
<0.01
<0.01
0.0078 - 0.031
<0.01
<0.01
0.00086 - 17.5
0.00078 - <0.01 !
<0.01 - 0.018
<0.01-21.35
<0.66
<0.66
0.13-<0.662
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
<0.66
0.00659 - <0.66 2
<0.66
<0.66
<0.66
<0.66
<0.66
0.0112-<0.66:
0.252 - <0.66 :
<0.66
<0.66
<0.66
SiteU
<20
10-141
0.0019 - 0.0041
<0.02
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
<0.33
0.0187 - <0.33 !
<0.33
<0.33
<0.33
<0.33
<0.33
0.287 - 0.489
<0.33
<0.33
<0.33
<0.33
SiteV
<20
<20
0.0022
<0.02
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
SiteW
<1-30
<10-410
0.00093 - <0.01
<0.02 - 0.044
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.01
<0.33
<0.33
<0.66
<0.33
<0.33
0.302 - <0.66
<0.33
<0.33
<0.33
0.211 - <0.33
0.0652 - <0.33
0.00174 - <0.33 '
0.22 - <0.66
<0.33 - 0.347
<0.33
<0.33
<0.33
0.00577 - <0.33
<0.33
<0.33
<0.66
<0.33
DRTAB:_: xi_s
)/30/"»hV01 AM
Page 8 of 9
-------
Table 2-2
Concentration Ranges for Organic Compounds
Detected in Soil/Sediment -1995'
Schofield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Notes:
-------
Table 2-3
Concentration Ranges for Inorganic Potential Constituents of Concern in Soil/Sediment -1995'
Schofield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Analyte
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Nickel
Silver
Thallium
Vanadium
Zinc
Site 26
*
*
«
*
4
*
»
<10-171
»
*
*
*
*
*
Site 35
4
1.13-<232
14.4-495
4
<2-41.5
93.5 - 650
*
<8 - 3280
<1. 08 -2290
*
4
0.745 -<1 5 2
4
4
36.4 - 7280
Site 46
4
<0.5-<232
6.9 - 272
4
<0.6 - 22
4
4
4
2-2000
4
4
<2-<15
4
4
28.5 T 1070
Site 57
4
4
<3 - 159
4
4
4
<5 - 131
<8-310
4
4
4
4
*
4
4
Site 59
11.8 -<20
<1.5 - 48.9
<3-204
4
4
4
<5-93.4
<8-160
4
4
4
4
4
4
4
Site 61
4
4
4
4
4
41.8-482
4
: 10.8 -456
4
<0.01 - 0.7
4
4
4
4
4
Site 63
4
4
4
4
4
4
4
190-483
4
<0.01-1.1
4
4
4
4
4
P.IKC i of s
-------
Table 2-3
Concentration Ranges for Inorganic Potential Constituents of Concern in Soil/Sediment -19951
Schofield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Analyte
Antimony
Arsenic
B.i ri urn
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Nickel
Silver
Thallium
Vanadium
Zinc
Site 64B
»
*
»
*
*
*
<8 - 394
»
<0.01-1.3
*
*
«
Site 72B
»
12-573
*
*
»
<10-223
*
*
*
*
»
Site 73
*
3.37 -<23
24.9 - 662
9.6-170
Site 80
*
»
25.2 -1160
*
*
»
*
<8-1040
0.707 - 32.3
*
*
*
*
*
Site 81B
*
8.33-156
«
*
<8 - 1330
<5-142
<8 - 295
*
*
129-1100
*
10-81.2
*
Site 83
Site 88
*
*
11.7-57.2
*
*
*
*
<8-136
*
*
»
*
»
*
I>'^^»A
I'RTi^^BS
4t\it/1
kc 2 of 5
-------
Table 2-3
Concentration Ranges for Inorganic Potential Constituents of Concern in Soil/Sediment -19951
Schofield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Analyte
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Nickel
Silver
Thallium
Vanadium
Zinc
Site 90
33 - 80.3
4
*
*
<8 - 142
*
4
4
4
148-450
4
Site 93
4
2.89 - <23
16.3-79.7
4
115-600
<8-150
4
<0.01 - 0.56
*
*
*
178 - 580
SiteB
*
<3-268
*
<3-43.1
<8-874
<5 - 329
<8 - 314
<10-415
<0.01 - 0.75
4
*
4
*
26.9 - 957
SiteC
2.77 - <20 2
*
<3-245
»
0.43 - 40.2
<8-920
<5-380
43.7 - 371
7.71-212
<0.01-1.8
*
*
*
*
35.1 - 495
SiteD
<20 - 58.4
10 - <23
6.9 - 400
*
<3 - 73
132-1100
<5 - 392
*
<10 - 382
«
*
0.783 - <15
9.7 - 70.8
4
24.5 - 737
SiteE
<10-<202
*
11.7-419
*
*
*
<5-189 .
*
3.6-160
*
*
»
*
*
*
SiteH
*
4
8.72 - 252
»
4
*
<5 - 432
*
1.81 -365
»
*
*
4
4
55.4 - 403
L>RTAH2_.1X1.S
4/1H/'>i. lin AM
I'apc 3 of 5
-------
Table 2-3
Concentration Ranges for Inorganic Potential Constituents of Concern in Soil/Sediment -1995*
Schofield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Analyte
Antimony
Arsenic
Barium
Beryllium
Cndmium
Chromium
Cobalt
Copper
Lend
Mercury
Nickel
Silver
Thallium
Vanadium
Zinc
Site I
*
<0.5 - <23 2
9.92 - 393
»
*
<5-167
<8 - 955
<2.5 - 220
»
*
0.354 - <15 2
*
*
*
Site]
*
0.333 - <23 2
35.3-138
0.25 - <3 2
*
<5-83.1
<8 - 403
3.8 - 256
»
*
0.376 - <15 2
»
»
SlteK
»
2.49 - <23 2
25.8 - 79.2
0.282 - <0.4 2
0.75 - <3 2
»
<5 - 131
<8-132
*
*
*
*
»
*
»
SiteL
»
*
17.9-155
*
*
*
<8 - 179
»
*
»
*
*
*
SiteO
»
0.684 - <23 2
9.1 -199
*
<2 - 8.3
*
17.2-171
<8-178
8.3-226
<0.01 - 3.26
*
*
»
»
*
SiteP
*
*
<3-115
*
0.58 - <3 2
4
»
<8-136
1.01-531
<0.01 - 0.66
»
0.731 - <15 2
*
162-470
51.3-677
SiteR
»
*
17.9 - 348
0.79 - <3 2
*
*
<8-184
<0.5 - 90.3
<0.01 - 0.97
»
0.853 -<1 5 2
*
123-520
*
PRT/^^^ks
j/Ki/^^^Ru
;e 4 of 5
-------
Table 2-3
Concentration Ranges for Inorganic Potential Constituents of Concern in Soil/Sediment -1995'
Schofield Barracks, Operable Unit 3
(Concentrations in milligrams per kilogram)
Anaiyte
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Mercury
Nickel
Silver
Thallium
Vanadium
Zinc
SiteS
«
»
18.4 - 408
»
38.9 - 515
<8-139
1.11-164
<0.01 - 1.63
*
4
8.1-68
*
28.8 - 354
SiteU
*
4
<3-42S
*
»
<5-130
<10-233
*
*
<23-43.7
*
26.7-1140
SiteV
19.6 - <20
*
*
1.46-<3
262 - 510
*
<8 - 167
*
*
«
*
SiteW
*
*
8.9 - 277
»
*
*
*
*
3.03 - 1040
<0.01 - 1.89
*
*
- »
*
38-728
Notes;
or = Not detected above detection limit x.
* = This constituent was not identified as a potential constituent of concern for this site.
Range of analyte concentrations reported for samples from lowest reported concentration or method detection limit
to highest reported concentration or method detection limit. Method detection limits varied by laboratory. Range does
not include detection limits that were raised above the laboratory method detection limit due to interference or dilution.
1 Range includes concentrations reported by the laboratory that were less than the method detection limit.
I1RTAP3.1XI5
4/Wll. -i 17 AM
Page 5 of 5
-------
Table 2-4
Concentration Ranges for Organic Compounds
Detected in Surface Water -19951
Schofield Barracks, Operable Unit 3
(Concentrations in tnicrograms per liter)
Site ID
26
35
E
H
K
O
P
R
S
Total Petroleum Hydrocarbons
Gasoline
<2500
--
<2500
<2500
<2500
<2500
<2500 - 2500
<2500
<2500
Diesel
700-<2500
--
<2500
<2500
<2500
<2500
<2500
<2500
<2500
Semi- Volatile Organic Compounds
Di-n-butyl phthalate
<10
1.13'
<10
<10
1.03 -<10
-------
Table 2-5
Concentration Ranges for Inorganic Potential Constituents of Concern in Surface Water -1995'
Schofield Barracks, Operable Unit 3
(Concentrations in micrograms per liter)
Site ID
26
35
E
H
K
0
P
R
S
Chromium
100-383
*
«
*
*
»
*
Cobalt
<5 - 162
*
*
*
*
*
4
»
Copper
<8-334
*
*
<8-20
*
»
*
*
Cyanide
<50 - 350
350'
»
250 - 400
*
*
»
<50-150
Lead
<10-491
»
»
<10-215
*
»
Nickel
<5 - 202
*
*
<5 - 27
*
*
<5 - 8
*
»
Zinc
32-1380
80'
*
<5 - 54
41 - 129
4-
15-40
26 - 52
5-8
Notes:
* indicates that this constituent was not identified as a potential constituent of concern for this site.
1 Range of analyte concentrations reported for samples from lowest reported concentration or method detection limit
to highest reported concentration or method detection limit.
' No range provided because only one surface water sample was analyzed for this site.
tWTAIl:_5.XIS
Page 1 of 1
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Table 2-6
Maximum Values of Calculated Hazard Indices (HI) and
Cancer Risk Values
Schofield Barracks, Operable Unit 3
Site ID
21
26
35
46
57
59
61
63
646
72B
73
74
80
81B
83
88
90
93
B
C
D
E
H
I
J
K
L
O
P
R
S
U
V
w
Maximum HI Values
Off-Base
Exposure'
5.75E-07
6.77E-10
1.35E-06
5.77E-07
1.21E-05
1.30E-05
8.07E-07
5.08E-07
5.56E-07
4.72E-08
1.36E-06
No constituents of concern
2.90E-07
2.93E-05
No constituents of concern
5.21 E-08
7.05E-07
1.76E-06
1.55E-05
3.89E-05
1.39E-05
1.01E-05
1.27E-05
5.73E-06
3.73E-06
8.04E-08
1.06E-10
4.81 E-07
5.05E-07
8.76E-08
5.18E-07
2.89E-08
1.87E-06
1.04E-06
On-Site
Exposure1
8.52E-02
1.05E-01
1.10E-01
6.25E-02
4.85E-01
2.91E-01
2.86E-02
1.13E-02
3.37E-02
2.56E-03
5.84E-02
identified at site.
1.45E-01
7.05E-01
identified at site.
2.26E-03
3.42E-01
6.45E-01
4.54E-01
5.06E-01
9.00E.01
4.09E-01
3.55E-01
2.49E-01
1.76E-01
2.15E-01
2.52E-03
3.34E-01
2.83E-02
3.06E-02
3.60E-01
3.70E-01
9.16E-02
4.31 E-02
Maximum
Off-Base
Exposure
3.41 E-ll
. 1.61E-14
3.36E-10
2.24E-10
0'
2.79E-09
1.10E-08
0
Cancer Risks
On-Site
Exposure
9.06E-06
2.39E-08
2.03E-05
4.57E-05
0
1.56E-05
1.28E-05
0
0 0
4.39E-15 4.30E-07
6.56E-10 8.20E-06
No constituents of concern identified at site.
0 0
3.39E-08 5.42E-05
No constituents of concern identified at site.
0 0
0
1.39E-08
2.68E-10
2.20E-08
4.43E-10
1.19E-15
9.08E-13
0
2.95E-11
3.60E-11
8.83E-16
7.75E-11
5.58E-11
.05E-14
.31E-14
.56E-14
.17E-08
.10E-19
0
4.82E-06
1.68E-05
2.30E-05
4.28E-05
6.19E-06
3.68E-07
6.89E-06
5.82E-06
9.75E-06
6.88E-10
1.67E-05
9.66E-06
1.28E-08
1.13E-05
2.32E-08
2.72E-05
1.27E-10
Notes
Off-base exposure was calculated for populations living outside of Schofield Barracks.
On-site exposure was calculated for populations living or working at an individual site in OL' 3.
A cancer risk of "0" indicates that carcinogenic constituents of concern were not present at the site.
DRTAB:.6XLS
5/10/9* 8:33 AM
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