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32501 .042 0 5 . 0 1 . 4 2 . 0 0 0 7
UNITED STATES ENVIRONMENTAL PROTECTION REGION 4
ATLANTA FEDERAL CENTER 61 FORSYTH STREET, SW
ATLANTA, GEORGIA
CERTIFIED MAIL RETURN RECEIPT REOUESTED
I
4WD-FFB
Commanding Officer Naval Air Station Pensacola 190 Radford Boulevard Pensacola, Florida 32508-5217
SUBJ: Record of Decision - Operable Unit 17 NAS Pensacola NPL Site Pensacola, Florida
Dear Sir:
The U.S. Environmental Protection Agency Region 4 has reviewed the above subject decision document and concurs with the selected remedy for the Remedial Action at Site 42. This remedy is supported by the previously completed Investigation and Baseline Risk Reports.
The selected remedial alternative is no further action. This involves taking further remedial actima at the site and leaving the environmental media as they currently exist. This remedial action is protective of human health and the environment, complies with Federal and State requirements that are legally applicable or relevant and appropriate to the remedial action and is cost effective.
EPA appreciates the coordination efforts of Pensacola and the level of effort that was put forth in the documents leading to this decision. EPA looks forward to continuing the exemplary working relationship with NAS Pensacola and Southern Division Naval Facilities Engineering Command as we move toward final cleanup of the NPL site.
ly,\ , LRichard D. Green Director Waste Management Division
cc: Elsie Deput Assistant Secretary of the Navy Ron Joyner, NAS Pensacola Bill Hill, SOUTHDIV David Grabka, FDEP
Allison Abernathy,
FINAL OF DECISIONOPERABLE UNITSITE 42-PENSACOLA BAYNAS PENSACOLAPENSACOLA, FLORIDA
Contract Number:
Prepared for:
Comprehensive Lung-Term Environmental Action Navy
Naval Air StationFlorida
Prepared by:
Inc.5724 Trees DriveMemphis, Tennessee 38134(901) 372-7962
May 6, 1998
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of Contents
+ +
+
aLIST OF ABBREVIATIONS
+
+ I ?DECLARATION OF THE OF DECISION
+ I+1 SITE NAME, LOCATION AND DESCRIPTION
1 3I2.0 SITE HISTORY AND ENFORCEMENT ACTIVITIES + + 3a 1 +2.1 General Site History
4 I a I + 32.2 Site-Specific History
3.0 HIGHLIGHTS OF COMMUNITY PARTICIPATION I . 8
+ I ? I r 94.0 SCOPE AND ROLE OF THE OPERABLE UNIT
10+ ISITE CHARACTERISTICS +
a + + I 105.1 and Extent of Contamination + 1 I 20. +5 . 2 Fate and Transport
+ + + 211 + I +6 SUMMARY OF SITE RISKS 226.1 Ecological Risk Assessment
6.1 1 Problem . + I + 23Preliminary
43Exposure Estimate . 1 ++1+4 Preliminary Risk Calculation
45I + I ++I+ +Uncertainties 1
46+4 + &I I a6 .I Ecological Risk 47a I + + a aConclusions +
47+ + t * + I+6.2 Human Health Exposure Assessment 51+ a6 2 Carcinogenicity and Effects 53+ITissue 531+ ++ . + # a IConclusions 55a. I6.3 Baseline Assessment Conclusions
+ + + 57+a+7.0 THE SELECTED REMEDY
a + a + 584 +8.0 STATUTORY DETERMINATIONS 58* + + a +I Protection of Human Health and the Environment
+8.2 of the 1 + +
. + + a a8.3 Cost-Effectiveness + + 60
608.4 Use of Permanent Solutions to the Maximum Extent PracticablePreference for Treatment as a Principal Element + I I 1 60
22+ +
43
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9.0 DOCUMENTATION OF NO SIGNIFICANT CHANGES * + + 61
+ II I I I 4 a + I 6210.0 REFERENCES
List of
a I 2I + + I + +
6
2
65-
-
--1
2
1
1
Site Location Map 4 1 + + 4Figure Contaminant Sources and Ecologically Sensitive Areas
+ I a 4 + 11 + + IIFigure Nature and Extent Silver
n+
++ + +Nature and Extent of I + +Figure Nature and Extent (Lindane)
+ + I4Figure 6
6
-
-5
3 and Extent
+ 1 + + a I a I 4 a I
3233Nature and Extent Anthracene
I + + I 34gure Nature and Extent + a 4 + * + 35
Figure
6
66 -
--678
Nature and ExtentNature and Extent + + + a I + + a a 1
3736
+6-9 Nature and Extent 38I a +6-10 Nature and Extent Fluorene
+ + 39+ + + a6-11 Nature and Extent Phenanthrene a a I 4 I + I
a
406-12 and Extent
List of Tables
6Table 2-1 NAS Sites Related to Assessment Zones in Pensacola I 12+Table 5-1 Detected in Sediment +
15aTable 5-2 Detected Pesticides in Sediment 17a + + I + +Table 5-3 Detected in Sediment
a a + + I t 19Table 5 4 Detected inSediment 4 26
TableTable
66-
-32 Site 42 Concentrations Exceeding
a a aTable 6-1 Site 42 Inorganics Exceeding Benchmark 1
4131
+SVOC Concentrations Exceeding Screening CriteriaTable Justification for Human Exposure Pathways -
a + 48a I I+ I 3 &a +Site 426-5 Chemicals Detected in Crab
+
Tissue Samples (in
554 4+ +I1 + INAS Pensacola, Site 2
+ 1 I I +Table 6-6 Risk Projections for Based Tissue Ingestion I + + a 59ITable 8-1 and for Selected Remedy
B B
•
•
- - . 111
B
•
•
. . . 111
List of Appendices
Appendix A GlossaryAppendix Responsiveness Summary
-
of Abbreviations
The following list contains may of the abbreviations, acronyms, and symbols used in thisdocument. A glossary of technical terms i s in Appendix A.
BEHPBRA
CERCLA
E&E
FDEPFFA
HHRAHI
HRS
ILCRIWTP
MSL
NASNCPNPDESNPL
PAHPBS
Applicable or Relevant and Appropriate Requirements
Risk Assessment
ComprehensiveIntake
Environmental Response, Compensation and Liability ActChemical of ConcernChemical of Potential Concern
Ecology & Environment,Ecological Risk Assessment
Florida Department of Environmental ProtectionFederal Facilities Agreement
Human Health Risk AssessmentHazard IndexHazard QuotientHazard Ranking System
Intercoastal WaterwayIncremental Lifetime Excess Cancer RiskIndustrial Wastewater Treatment Plant
contaminant levelmilligram per kilogramMean Sea
Naval Air StationNational Contingency PlanNational Pollutant Discharge Elimination SystemNational Priorities List
Unit
Polycyclic Aromatic HydrocarbonBay System
(continued)
PCBPEL
PRAPPRG
RARAB
RCRA
ROD
SARA
ssvsvocSWMU
TALTCLTELTOCTRC
voc
Polychlorinated BiphenylProbable Effects Levelpart per billionpart per millionProposed Remedial Action PlanPreliminary Goal
Quality AssuranceQuality Control
Risk AssessmentRestoration Advisory Board
Resource Conservation and Recovery ActReferenceRemedial Investigation
Dose
Record of Decision
Superfund Amendments and Reauthorization Act of 1986Sediment Quality Assessment GuidelineSediment Screening ValueSemivolatile Organic CompoundSolid Waste Management Unit
Total hydrocarbonTarget Analyte ListTarget Compound ListThreshold Effect LevelTotal Organic CarbonTechnical Review Committee
Environmental Protection Agency
Volatile Organic Compound
Micrograms per kilogram
V
DECLARATION OF THE RECORD OF DECISION
Site Name and
Operable Unit 17Site 42 -Pensacola BayNaval Air Station PensacolaPensacola, Florida
Statement of Purpose
This decision document (Record of Decision), presents the selected remedial action for OperableUnit 17 (Site 42, Pensacola Bay) at Naval Air Station Pensacola, Pensacola, Florida, which was
accordance with the Comprehensive Environmental Response, Compensation, andAct of as amended by the Superfund Amendments and Reauthorization
Act of 1986 (SARA), 42 9601 and the extent practicable, the NationalContingency Plan (NCP), Code of Regulations Part 300. This decision is based on theadministrative record fur Operable Unit 17 at the Naval Air Station Pensacola.
The United States Environmental Protection Agency and the Florida Department of EnvironmentalProtection concur with the selected remedy.
Description of the Selected Remedy
This action is the first and action for the operable unit. The remedial investigation and thehuman health and ecological risk assessment conducted for Operable Unit 17 support aremedial alternative. The remedial investigation and risk assessment addressed all media at thesite, and therefore, no other actions will be considered fur Operable Unit
Declaration Statement
No remedial action i s necessary to ensure protection of human health and the Theselected remedy complies with and state requirements that are legally applicable or relevantand appropriate to the remedial action, and is cost-effective.
M Commanding DatePensacola
Record ofNAS Unit 17
recreation maintaining a fish and wildlife population.
SITE NAME, LOCATION AND DESCRIPTION
It includes theand southern borders of Naval Air Station (NAS) Escambia County.
Trout Point, east to NAS Pier 303, and terminating
at the mouth of Bayou Grande. Primarily situated in Escambia County, Pensacola Bay occupiesapproximately 52 square miles of surface area. Approximately miles of Pensacola
+
Bay
coastline border NAS Pensacola property (Figure The Florida Department of Environmental
NAS Pensacda surface elevation ranges from to approximately 40 feet above mean sea
prominent topographic feature at NAS Pensacola is a bluff paralleling the
and eastern shorelines. Between the bluff and the shoreline, a nearly level marine terrace
approximately feet above Gently rolling uplands reach of up to 40 feet
above landward of the bluff.
Surface soil at NAS Pensacola is primarily highly permeable sands limiting formation.
Several naturally occurring intermittent streams and numerous man-made drainage ditches flow
south into Pensacola Bay. The depth of Pensacola Bay the NAS Pensacda area i s 10 feet.
The depth to groundwater at NAS Pensacola ranges from less than 1foot to approximately 20 feet below land surface, depending upon land surface elevation and proximity to surface water bodies,
including Pensacola Bay. Groundwater i s not currently used as a potable water source at
NAS Pensacola. Potable water for NAS Pensacola is received from Station, approximately
4 miles Three NAS Pensacola supply wells on the facility are used for backup supplies only
during periods of demand. The zone in the supply is screened is protected from
surface contamination by a to thick, low-permeability clay layer. Groundwater
contamination has not been detected in this zone.
Z
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A
LABEL NAME GROUNDWATER .
35
BAYOU A BAY, BAYOU (FROM STORM
BAYOUBAYOUBAYOU
G
BAYOUBAYOUBAYOU
METALS, (NO
PESTICIDES, METALS
11
METALS, PESTICIDES, METALSMETALS
PESTICIDES
(FROM STORM
f
AAI
W O E
METALS,
METALS
ff
13
1516
METALS
METALS,METALS, PESTICIDES,
If
(FROM STORM DRAINS)
BAYOUBAYOUBAYOU
I1824 PESTICIDES,25 PESTICIDES
A BAY (FROM STORM DRAINS)
PESTICIDES,
METALS, PESTICIDES,METALS PESTICIDES, PBS,METALS, PESTICIDES
BAYOU
METALS,
A BAY, BAYOUAA BAYOU
PESTICIDESMETALS, PESTICIDES
METALS, PESTICIDES, PENSACOLA
BAY
3221 4
BUILDING
35573220
SITE3644
649,18
TO 3255
SITE 27
20
2326
18
SLUDGEPIPELINEUNKNOWN
MULTIPLE GAL.
GAL:
OPENM 12
UNKNOWNUNKNOWNUNKNOWNUNKNOWN
WASTEWASTE FWELJP-5
DIESEL JET FUEL
USEDWASTEDIESEL,
FUEL
WASTEFUEL OIL
KEROSENEm
JET FUEL
WASTE OIL, WATERFUEL
JET
FUELFUELFUELFUEL
METHYLENE CHLORIDEPETROLEUM
HYDROCARBONSHYDROCARBONS
NONE
NONE
UNKNOWNUNKNOWN
UNKNOWNPETROLEUM HYDROCARBONS
UNKNOWN
NONE
PETROLEUMPETROLEUM
HYDROCARBONSHYDROCARBONS
HYDROCARBONS
IMPACT
METALSMETALS
METALS, RADIATION
(GW NOT
METALS,
INVESTIGATED)
BAYOUBAYOU F
A BAY
BAYOUBAYOU
f
.. . . . . . . .
....
IMPACTS TO PENSACOLA BAY FROMAT PENSACOLA INVESTIGATED BY
CONTAMINANTS METALS,
PESTICIDES,
i
. .
a
. .
A
I
1517
22232425262829
I 30344438
PETRO 979
977
956-1964719811979
1972- 11972-1979
FROM THE CRASH CREW TRAINING AREAFROM THE GOLF COURSE
FROM AT SITEFROM A RUPTURED TRANSFORMER
FUEL FROM A BREAKFUEL FROM A PIPELINE LEAK
OF FUEL FROM
FROM A AREAWASTE FROM REMOVAL
FROM CHEMICALTRANSFORMER FEU FROM A TRUCK LEAKEDSKIN BURNS FROM A IN80,000 GALLONS OF WASTESULFURICFUEL FROM THE BILGE
SOLVENT DETERGENTSTORED AT BUILDING 3380
FUEL FROM A PIPELINE
WASTE DUMPED INTO
-
-
- STORM0 -
-
-
-NATURE OF YEAR ISPILLS FROM ENVIRONMENTAL SITES
REFERENCES:
- SITE
A DRAINS)
A
NDE
ONREPORTS FROM
WORKS CENTER,
2. AND OTHER INFORMATION
SPILLS ON1983 AND HISTORICAL
SITE: SPECIFIC RI
by:
--
FROM THE GOLF COURSESTORED AT
AA PIPELINE
FROMA PIPELINE BREAK
M A MIXINGREMOVAL
AOM A SUBSTANCE IN
OF
GENT AT BUILDING
PLATING
EFERENCES:
INFORMATION BASED ON
WORKS
AND OTHER INFORMATION
FROM
ON
INFORMATION ON1983 AND HISTORICAL
COMPILED INSPECIFIC
TRAINING AREA 1955-PRESENT1963-1978ONGOING1967
1958-1977
196919811979
1972-
... . . .... . .
-
-
-
-
-
-
-
-
-
SITE
PETROLEUM SITE OR UNDERGROUNDSTORAGE TANK
WETLAND
SURFACE DRAINAGE DISCHARGE POINT,ON DRAINAGE BASIN
STORM WATER OUTFALL
SURFACE SPILL
SEDIMENT SAMPLE.
ESTUARINE AQUATIC BED
36
800
SCALE
0 800
FEET
. .
A
LEGEND
FIGURECONTAMINANT SOURCES AND
ECOLOGICALLY SENSITIVE AREAS
by:
Ck by:
Date: 02/02/98'
. Tr by: 0036-00138
1
DWG I I
sites, spill locations, and petroleum sites assessing the likely
of discharge into the bay. Pertinent information summarized in Table
Collard (1991) summarizes the environmental-biological history of the PBS documenting
published as well as previously unpublished data from numerous studies conducted the 1950s
to the present. which were conducted to identify biological trends and help
understand the current status of the PBS. have been performed with varying sampling methods,and analytical procedures They were presented the work plan tor Sites 40 and 42.
Collard’s trends (1) the data did not support distinct, discernible I
trends and (2) future investigations should not attempt to evaluate existing data for these trends +
because of database deficiencies
Pensacola Bay Studies
1984 Thompson & Testing-Sediment samples were collected along the
four edges of the basin for analysis of grain size, polychlorinated biphenyls
oil and grease, and total and volatile solids. were not detected and
concentrations were considered representative of natural conditions
1984 & Miller -Sediment samples were collected from storm sewer
approximately 300 feet offshore of the facility’s southeastern waterfront Trace
of arsenic were detected in samples, but the method used was
inappropriate for assessing the total contaminant burden to sediment
5
3
m
3 .
3
3
I
0
Record DecisionOperable 17
1982-1985 of Environmental Protection -Sediment samples
collected from Bay’s basin south of the waterfront, Big Lagoon,
and the mouth of Bayou Grande showed elevated concentrations of mercury and
of Nitrogen to total carbon (TOC) indicated
sediments in the turning basin at the mouth of
Bayou Grande
1986 Navy -Water and sediment samples collected from the turning basin were
analyzed for heavy metals during an environmental impact study. Results are
considered suspect because laboratory quality control
were not provided. According to the consultant’s report, chromium and zinc
concentrations were elevated
1991 - A Phase I Contamination Activities Investigation
conducted at Site 2, the waterfront sediment, to identify source areas and
contaminants of concern and to provide recommendations for the next phases of the
investigation. Results indicated metals volatile organic compounds total
recoverable petroleum hydrocarbons and polycyclic aromatic hydrocarbons
Site 2 3) was investigated as a separate remedial investigation The
provided here because Site is within Site 42. At Site the
appeared related tu the historical discharge of untreated industrial
sources possibly contributing to the
contamination cited above are operations at the aircraft carrier berth and naval
shipping and private industrial facilities discharging effluent the bay.
7
Record of DecisionNAS Operable
Site 6,1998
3.0
history the community has been kept abreast of activities accordance with
CERCLA Sections and In January 1989, a Technical Review Committee
(TRC) was formed to review recommendations for and progress of the investigation and
remediation at NAS The TRC was made up of representatives of the Navy,
the local community. In addition, a mailing list of interested community
members and was established and maintained by the Pensacola Public Affairs
Office. In July 1995, a Restoration Advisory Board was established as a for communication between the community and The absorbed the TRC and
added members from the community and local organizations. Its members work together to
monitor progress of the investigation and to review remediation activities and recommendations
at NAS Pensacoh, RAB meetings are held regularly, advertised, and are open to the public.
the preferred alternative for OU 17 was presented in the Proposed
Remedial Action Plan (PRAP), also called the Proposed Plan. A copy was sent everyone on
the NAS mailing list. The notice of availability of the Proposed Plan and
was published the News Journal on December 12, 1997, followed by a public
comment period. from December 8, 1997 to January 22, 1998, to encourage public participation
in the remedy-selection process. The opportunity for a public meeting was provided during the
comment
8
of Decision17
Site
4.0 AND ROLE OF THE OPERABLE UNITaction identified this document is the "no action alternative. No action
proposed because it does not pose an excess risk to human health and the
environment. This remedy is the and final remedial action planned for
This i s the only Record of Decision (ROD) contemplated for OU Operable Unit which
consists of Site 42, i s one of 13 operable units within NAS Pensacola. The purpose
of each operable unit defined in the FY Site Management
1997) for NAS Pensacola, which is in the Administrative Record.
Separate investigations and assessments are being conducted for the other operable units at
NAS Pensacola in accordance with CERCLA. Therefore, this ROD applies only to
9
Record of DecisionOperable 17
42- Buy8
SITE
Nature and Extent of Contamination
Metals
upper bounds range of detected concentrations and average detected
approximately of coastline. The Phase sampling targeted the sediments and
areas of high identified during Phase I sampling. Phase I assessed areas of deposition and
erosion by mapping sediment types. TOC analysis was used to determine that the adsorptive
capacity of were low. Figure 5-1 depicts the sediment sampling locations. This section nature and extent of the analytes detected the Phase investigation.
concentrations. Frequency of detection is a ratio of detections to samples analyzed. The
range of nondetects describes the range of nondetects in the sampling set as a minimum and
The range of detected concentrations shows the and
concentrations detected. The average detected concentration is the arithmetic mean o f only the
detected concentrations concentrations were not included in this calculation to give
an accurate of what was detected.
AS shown in Table every metal the list was detected. The frequency of detection was
few as in 141and as much as in 141. Not surprisingly, the primary seawater constituents
calcium magnesium, potassium, and sodium were detected in every sample.
ar-.
-
NAS
3
FA-
. . -. -.a
. .
LEGEND 42RECORD OF DECISION
PENSACOLAPHASE
PHASE 5-1COAST GUARD FACILITY LOCATION PHASE IAND
SAMPLING STATIONS
*
GT
I
8
1
8 8
T
I
I
I
I
+
3
U
E
t I
3
II
1 I
0
0+
nC
U
3
3
V
E
EE +-
3
-
-
Record of DecisionNAS
Site 42- Bay
TableDetected Inorganics in
of Detectedof Detection Ranee of Concentrations Average Detected Concentration
14.8Silver 141
Sodium 3,735
(TI) 0.31 -
0 . 1 2 0.14 0.13 - 37.4 3.63
- 0.23 - 84.4
milligrams per kilogram
13
Record DecisionUnit 17
Site 42-6,
range of upper bounds range of detected concentrations
and average detected concentration. The frequency of detection was less than a third of the
number of
Semivolatile Organic CompoundsTwenty-three were detected in the 141 Site 42 samples. From Table 5-3, the frequency
of detection ranges one to 34 detections 141 samples.
Volatile Organic
were detected in the 141 samples collected at Site 42. Table displays the
frequency of detection, range of upper bounds, range of detected concentrations and
average detected concentration. The frequency of detections is less than 7% of the total number
of samples
No sediment quality screening values are available for VOCs in sediments. Areas of high TOC
and fine grained sediment such as Trout Point, barge fuel dock, concrete seawall and quay, and
industrial wastewater treatment plant (IWTP) show some or all of these VOCs just above the
detection limit
Conclusions
All sample at which contamination was detected were surrounded by locations at which
no contamination was found. Thus, the areal extent of contamination is easily discernible from
the sampling data. The analytical data identified metals, pesticides, and VOCs at
Site 42. Areas of greater contaminant detections compared to other areas sampled include the
*
- *
-
I
I
dI
I
I
I
I
I1
It
It
I
I
03
I I
+0
+
II
I
t
a
I
0
b-e
u
c
L
M
I
m
+
c E m
w
cc -
•
delta-BHe 6/141
ga rna BHC (Lindane) 291141
samma-Chlordane 1/141 •
Note: All res Its are in micrograms. per kilogram (ug/kg).
Table 5-2 Detected Pesticides in Sediment (pg/kg)
0.093 - 1.6
0.093 1 6
0093 1 6
16
0.11 -0.4
0,11-1,3
o 15 0 15 ~
Record of Decision NAS Pensacola Operable Unit 17
Site 42 Pensacola Bay May 6, 1998
0,2183
0.3721
o 15
•
Table 5-2 Detected Pesticides in Sediment (pg/kg)
Pesticide~=======d~~ of Dete~c~t @=======!!""""of Nondetects
delta-BHe 6/141 0.093 - 1.6
ga rna BHC (Lindane) 29/141 0.093 1 6
Record of Decision NAS Pensacola Operable Unit 17
Sire 42 - Pensacola Bay May 6, 199~ . ;
of i)etected Concentrations ::: ::::::=:=
Average Detected Concentration === =
0.11 - 0.4
0.11-l.3 0.3721
.. ~amma -Chlordan;:e =: ______________ 1:.:./~14:.1:...... __ _=====:::::::::::=0=09=3==1 =6====::::::::::====0:::::1:5 =0:1:5::: o 15
Note: All res I(s are in micrograms per kilogram (ug/kg).
16
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3
- -
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8
1
1
ti
3
+ +
8 8
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8
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+
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Record Decision17
42- Bay6, 1998
5-3Detected in
Range of Detected Average DetectedConcentrations ration
phe 4,200.0
Phena rene 36. 170.0 410.0 97 375
24. - 39.0
Py ne 170.0 22 . - 2,300.0 2 15
I ) ph 350.
Phenol
18
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barge loading Coast Guard Station, concrete seawall and quay, and the IWTP.
Contamination in. these areas is related to the discharges from these facilities.
Record of DecisionOperable
6, 1998
5.2 Fate and Transport
Metals and were found in Site 42 sediments. The marine
environment encourages the assimilation of contaminants into sediment, which transported
by deposited, unaffected by currents, for long periods of time. The chemistry
o f seawater does not encourage to dissolve and, if they are dissolved, seawater
dilution prevents measuring their contribution to the sea,
The proximity of NAS to the bay suggests impact is occurring. Humans would
be exposed possibly by consumption of seafood, because the Bay seawater is not a source of
bathing potable water The ecological receptors affected by sediment contamination observed
will be sessile benthic such as oysters and barnacles, and mobile species
closely associated with the sediments such as crab, shrimp, and flounder. An edible crab tissue
study at Site 2 (within Site 42) did not detect any contaminants at a concentration causing a risk
to humans for consumption.
Record of DecisionNAS Operable Unit I 7
Site
6.0 OF SITE RISKS
During the baseline risk assessment evaluating excess human health risk and excess ecological risk were conducted to evaluate the actual or potential risks to human health the
environment resulting from the no-action scenario at Site 42. is incorporated into Section
of the report. The BRA represents an evaluation of the action alternative, because it
identified the present if no remedial action is taken. The assessment considers
media and exposure pathways that could result in an unacceptable levels of exposure now or in the
foreseeable future. Data collected and analyzed during the provided the basis for the risk
evaluation.
Since Site 42 a marine environment, the ecological risk assessment, which is a component of
the compared observed sediment concentrations to sediment screening values considered
be critical exposure levels for marine fauna. The approach used to assess human health is a
preliminary screening, evaluating exposure potential based Site 42 physical characteristics
BRA Objectives
Characterize the source media and determine the chemicals of potential concern
for Site 42 at NAS
Identify potential receptors and quantify potential exposures under current and future
Qualitatively quantitatively evaluate the adverse effects associated with the
21
6.1 Ecological Risk Assessment
The ecological assessment (ERA) is a key component of the BRA. It develops a qualitative
quantitative ecological appraisal of the actual or potential effects of Site 42. The
assessment considers environmental media and exposure pathways potentially resulting in
unacceptable concentrations of exposure to flora and fauna now or in the foreseeable future.
Record of DecisionNAS Unit
Site 42-
Formulation
This section uses basic information about the site setting, potential receptor species, and
assessment endpoints to assess the environmental threat present. This assessment uses a qualitative
weight-ofevidence approach to judge the validity of a pathway to a receptor. To describe
qualitative risk, the terms “low,” “medium,” and “high”are used. These are not quantitative
but are useful comparing one area or sample location to another.
Potential
Species with the highest potential fur contamination effects are sessile benthic macroinvertebrates
such as oysters and barnacles, and mobile species closely associated with the sediments such as crab, shrimp, and flounder.
Assessment Endpoints
The potential for negative effects tu benthic communities from contamination was the
The work
plan outlined phased approach tu assess ecological risks from site contamination. The phased
assessment endpoint selected for the screening-level assessment for the site
approach a preliminary screening assessment in which concentrations were compared to
benchmark effects levels. If the screening assessment had exhibited a high potential for effects,
the subsequent phases (acute toxicity tests, diversity tests or bioassays) would have been
conducted.
22
ofOperable Unit 17
Site 6,
Preliminary Characterization
characterize risk to receptors, contaminant concentrations have been compared to sediment
quality guidelines+ For assessment, the benchmark effects levels used to assess the potential
effects to benthic species are the Region IV Sediment Screening Values (SSVs) and the
FDEP Sediment Quality Assessment Guidelines (SQAGs)
ssvs SSVs are based on contaminant concentration associated with a low probability of unacceptable
risks to ecological receptors. The Office of Health Assessment has developed these for use at
Region hazardous waste sites. Because these numbers are based on conservative endpoints and
sensitive ecological effects SSVs represent a preliminary screening of site contaminant levels
determine further investigation is needed. Ecological screening values are not
SSVs are derived from statistical interpretation of effects databases obtained
the literature as publications from the State of Florida, the National Oceanic and Atmospheric Administration, and a joint publication by Long et (1995). These values are
based observations of direct toxicity when available
SQAGs
The preliminary SQAGs developed by McDonald are guidelines for evaluating sediment
contamination coastal ecosystems. Defining the range of sediment contamination is a two-step
process. First, parameters are compared to the threshold effects level (TEL), the upper
of the range of sediment contaminant concentrations dominated by no effects data entries
a effects range). Within this range, sediment concentrations are nut considered to
represent a hazard tu aquatic organisms. Next, they are compared the probable effects level
(PEL), which the lower range of contaminant concentrations that are usually associated
with adverse biological effects. The SQAGs do not address the potential for of
persistent toxic chemicals and potential adverse effects on higher trophic levels of the food web.
23
Record DecisionOperable Unit 7
Site 42 - BayNovember 1998
Contaminant Results and Effect Characteristics
The following paragraphs discuss the contaminants detected in sediment collected from the
141 sample locations along approximately 10 of shoreline as described Section 5.0, Site
is major contaminant type:
metals, and Of the metals, only one detection of silver exceeded
the PEL. Of the organic constituents detected, one sample with DDT, two samples with lindane,
and one sample exceeded PEL.
Arsenic
Arsenic was frequently detected across Site 42 (98 detections in 141 samples). Only ten locations
exceeded the SS’V and SQAG-TEL of 7.24 (Table No concentrations exceeded the
SQAG-PEL. detected range for arsenic was 0.12 to 22.3 parts per million (ppm).
None of these metals exceeded the SQAG-PEL (See Table
The range of detected mercury was from 0.08 to 0.64 ppm. Only seven locations had mercuryabove the SQAG-TEL. small population suggests a low risk to ecological receptors. No
concentrations exceeded the FDEP SQAG PEL (see Table
Silver
Silver was only detected at locations; both exceeded the SQAG-TEL and SQAG-PEL. No
other detections of silver were found. The limited extent alone (see Figure 6-1) suggests a low
risk to ecological resources (See Table
24
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Site 42-
Dieldrin
Dieldrin exceeded i t s SQAG-TEL of 0.715 at only one location (see Table 6-2) and it did
not exceed the or the
DDT
Site 42, locations exceeded the SQAG-TEL of 1+ 19 (Table 6-2 and Figure
Lindane was detected above screening levels at of the locations in Site 42 (see Table 6-2
and Figure 6-3).
ecological receptors
was detected at 16 locations across the site. Of these, two exceeded the
and exceeded the (see Table The limited distribution suggests limited risk
c li Hydrocarbons
Most detected were a general term applied to a group of compounds with two or
more benzene rings. They in the environment as a result of the incomplete combustion of
constituents of petroleum and its derivatives. Oil spills and refinery effluents
are major sources of contamination. In addition, storm water from urban areas is
to contain The content in storm water suggests hydrocarbon fuels and
asphalts associated with roadways as the source. During the sampling of Site 42, field crews
observed “tar balls” in dredge samples from the
28
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COAST GUARD
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Record of DecisionOperable Unit 17
Bay
4
Table 6-2Site 42 Concentrations Exceeding Benchmark
SQAG SQAGration ssv PEL
15 3.3 1.19 4.77 5.01.3
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Dieldrin 19 0.78 3.3 0.715 4.3 1.1
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SQAG Florida Department of Environmental Protection - Sediment Quality Assessment GuidelineEffectsTEL
PEL Effects Level1 Represents effects level for total
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SITE 42 RECORD OF DECISION NAS PENSACOLA PENSACOLA, FLORIDA
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NAT
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042 MZ644
PENSACOLA BAY
042MZ612
SITE 42 RECORD OF DECISION NAS PENSACOLA PENSACOLA, FLORIDA
NAT
IGURE 6-10
RE AND EXTENT FLUORENE
m
m
m m
a
C n
I
-e
W
I
W
I
4
I-CY
W
WX
I
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e
FIGURE 6-12
1
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i
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14
. . . .
- I
SITE 42LEGEND RECORD OFPENSACOLA
PENSACOLA,DETECTED 5)EXCEEDS SEDIMENTSCREENING CONCENTRATION NATURE
PYRENEAND EXTENTCOAST FACILITY
SCREENING LEVEL =
13
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Record Decision
42-
Table 6-3Exceeding Screening Criteria
SQAG SQAGContaminant tration ssv PEL
Acenaphthy
Anthr
Chrysene
Fluor
28 330 5 128
92
330 46.9 245
130
330 74.8 69395
1 8589
16 330 88.8 763140330140
330120520240
330 1494130220140
8 150
19 1201207302 10210
4.8
2.8 1.1
1.7
1.21.1
1.624.0
1.213.7
12.4
1.51.14.82.223.1
1.71.21.9
1
6.5
1.923
41
Record DecisionOperable
Site
Table 6-3Concentrations Exceeding Screening Criteria
SQAG SQAGConcentration ssv PEL
I31 330 2.246
63 3
Naphthalene 41 330 34.6 391 1.2
1.198 4.7
95 3
200 330 153 1393 1.3
1680 4.4190 1.2230 1.5
2,300
1 ,684 16,770 1.96.7
b 182 182 2647 6.018 7 .7
Notes: Region 4 Sediment Valuessv Department of Protection - Sediment Assessment GuidelineSQAG
EffectsTEL Probable Effects LevelPEL Hazard Quotient; Level
42
*
Operable Unit 17Site 42-
Phthalate Esters
(BEHP) exceeded the SSV and TEL of 182 at two locations (see
6-3). source for this organic constituent was identified for either location.
Because of the frequent use in pumps and plastics the laboratory, BEHP is considered
a contaminant However these concentrations were not rejected during data
validation for
Organic: Compounds
sediment screening values are present for VOCs Detected concentrations are presented
Section limited distribution and low values detected suggest a limited risk to ecological
receptors. are extremely mobile. At the concentrations observed, the would be
solutes in seawater or the sediment interstitial, fluids
Preliminary Exposure Estimate
The use of screening values for comparison of observed contaminant concentrations necessitates
an assumption benthic associated fauna will use the area surrounding a sample location
exclusively for feeding and other life requisites. Also, this screening approach assumes that 100%
of the contaminant concentration found will be bioavailable to those benthic organisms found at
at the location. By applying both of these assumptions in the screening assessment, a very
conservative estimate of a chemical's potential effects is made.
6.1.4 Preliminary Risk Calculation
the estimate (100 of contaminant concentration) for benthic infauna
associated with the sample location, and by applying the must conservative effects benchmark, a
hazard quotient can be determined for each sampling location (see Tables 6-1 through 6-3). The
hazard quotient method compares the estimated exposure concentrations to the measured or
43
4
Record Decision
Site 42 - BayNovember
predicted threshold value for effect. Equation 1presents the calculation method with explanation
of the variables
Sediment ConcentrationEquation 1 Hazard Quotient (HQ) SQAG Threshold Effect Level
An HQ of more 1 is interpreted as a level at which there is a potential for adverse ecological
effects. An HQ of less than 1does not indicate a lack of risk, but should be interpreted based on
For Site 42, were determined only for those contaminants exceeding the SQAG-TEL. Thus,
all quotients for the locations presented exceed 1and those locations not presented in the table
will be below The following paragraphs discuss exceedances and spatial relevance, along with
an interpretation of the number of exceedances relative to the size.
Metals
for arsenic, chromium, copper, lead, and mercury were less than 5 (see
Table Anthropogenic input of metals into sediments near NAS Pensacola has occurred, but
specific sources of these metals are difficult to The limited distribution of exceedances
and the low HQ values suggest a risk to ecological receptors.
Of the two screening level exceedances for silver, one had a HQ of 20.2. The limited extent
suggests a low to ecological resources
Pesticidest
For the three pesticides and one PCB detections listed in Table 6-2, all were 5 or less, and
most were less than Only 15 of the 141 locations sampled had concentrations
+ 44
Record Decision
6, 1998
above screening values and no spatial pattern was evident. Based on the limited distribution and
Results for 10 compounds were compared to screening values and values for total
Except two locations, the for all compounds did not exceed 3. For these same two locations were the only ones with concentrations above the screening value of
1,684 suggests the Coast Guard Station and the barge fueling pier are sources The barge fueling pier will be investigated under the auspices the
Florida program. Both facilities are permanent; expected operations will continue in the future. These concentrations suggest moderate risk to ecological receptors these areas.
The fur two locations exceeding the screening value were 6 and 7.7. With only two of
141 locations elevated concentrations it is predicted risk to ecological receptors is
1imited
6. Uncertainties
All sampling programs may produce unavoidable variations tu the design. Below are uncertainties
related to field conditions, laboratory procedures, other circumstances are likely to have
influenced the and risk assessment.
Analytical matrix interferences due tu excess organic in sediment Sampling in
the grass Trout Point required sampling roots and other benthic organisms with
the sample +
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*
Record of DecisionOperable
Bay
lack criteria or screening values for some chemicals increases the uncertainty for
screening level assessments.
The quotient approach lacks the consideration for natural metal concentrations, and
sediment grain-size and TOC effects as they relate to calculated using
guidance are typically more conservative than field exposure scenarios indicate
at Site 2, Sediments in Bay, no distinguishable
changes assemblages were distinguishable below an HQ of 10.0.
The nature of a marine ecosystem provides natural variability not considered +receptor scenarios
Risk Summary
Sediment chemistry results show concentrations for arsenic, cadmium, chromium, copper, lead
mercury, and are above Only one sample of silver exceeded a PEL. Hazardquotients calculated for these metals did not show any significant potential risk to receptors. The
limited detections and distribution suggest a limited risk to ecological receptors
appear to the most significant organic contaminants found at. the site. at Site 42
area are to past practices, but recent oil spills and asphalt road may have also
contributed to sediment loads. Samples taken near the barge loading dock and the Coast Guard
Station represent all the for exceeding the This suggests that sediments
near these sample locations are of moderate risk to ecological receptors. Both of these facilities
are permanent it is expected that operations will in the future. The barge loading
dock be investigated under the auspices of the Florida petroleum Pesticides,
and phthalate esters were detected in a limited number of samples and did not exceed a PEL. The
46
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Record DecisionNAS Operable
Bay
limited distribution and detections suggest a low risk to ecological receptors; therefore, additional
phases o f were not performed.
Conclusions
Apparent anthropogenic effects on sediment quality at Site 42 was detected during the
Contaminant classes included pesticides and and phthalates. Although
calculated quotients within each class of contaminants exceeded unity (suggesting a
potential risk), the calculated were generally low (less than arid the areal distribution of
the contaminant was generally limited. These factors combine to suggest the detected
contamination presents a low risk to ecological resources at Site 42.
One noted to is the PAH contamination at the barge fueling pier. This
contamination be addressed under the auspices of Florida's petroleum program.
6.2 Exposure Assessment
This assessment examines the potential for excess human exposure to the contaminants detected
at Site 42.
Current Use
NAS Pensacola Site 42, near the industrial portion of the base, is currently limited to boating
activities. Human contact with site media will occur only due to activities associated with the
Rescue Training School (short duration swimming), and a public beach at Beach, west of
the Coast Guard Station. Otherwise, swimming is not authorized anywhere else within Site 42.
Exposure
Exposure to at Site 42 appears be limited. Rescue Training activities involve training
students in the for a single class. This exposure i s to the surface water only and does nut
47
Record of
constitute a route and thus no surface water samples were: collected during the RI. Contact with near the developed portion of the base is by security, sediment depth,
and reduced of sediment to skin. Table lists the scenarios for exposure
routes . Beach samples had lower concentrations of than samples from other
areas, due to the strong surf and tidal currents in this area of Site 42.
3
Except for the activities of the rescue school and Beach, is not
allowed at Site 42. The site is monitored by the Navy and Coast Guard. The Navy
the seawall and quay, while the U.S. Coast Guard monitors boating traffic near the ICW.
frequent human exposure to site sediments is not possible. Occasional trespassing
possible, although trespassers would likely be arrested. Prudent individuals also would not risk
the physical hazards associated in the swift currents of the shipping channel.
Sediment
In addition to the security patrolling Site 42 and the surrounding area, other issues limit human
exposure to Site media. Many samples were during the that would be deeper than
could reach without diving equipment. If direct exposure were possible, sediment
near the shipping channel would be expected to contain chemicals of concern. However, direct,
frequent exposure to sediment is unrealistic because sediment is submerged year round. In
would wash off of skin rather than adsorbing, as is assumed for soil exposure.
sediment i s submerged year round
48
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of Decision
6, 1998
TableSummary Justification fur Eliminating Human Exposure Pathways -Site 42
NAS PensacolaPensacola, Florida
Medium and Pathway Selectedfor Evaluation for Selection or Exclusion
Site 42 soil. NoAir - of No concentrations were reported in sedimentgaseous contaminants exceeding their correspondingbased concentrations .
soil
43 ,
submerged year-round. Consequentlyassessing sediment exposure as if it weresoil would riot be appropriate. This exposure pathway was eliminated inaccordance USEPA Region
chemicals entrained in
Supplemental Guidance to RAGS 3,Exposure
Groundwater is the aquitard inNOGroundwater - Ingestionof contaminants during
or general use Pensacola
Groundwater is below the inGroundwater - Inhalation N O Pensacolaof volatilized groundwater
contaminants
Swimming is allowed only at Mustin Beach.Surface water was considered to apossible source o f contaminants.Consequently, this medium was
Surface water - Ingestionof contaminants during
1swimming
analyzed.
Swimming is allowed only at Mustin Beach.Surface water was not considered to be a
NoSurface water - Inhalationof volatilized groundwater
possible source of contarninants.Consequently, this medium was
Site 42 contains no soil.Soil - Incidental ingestion No
Site 42 no soil.- contact
Swimming i s allowed only at Mustin Beach.Site 42 sediment is submerged year-round.Consequently, assessing sediment exposureas if i t were soil would not be appropriate.This exposure pathway was in
- Incidental N O 1
accordance with USEPA RegionGuidance to RAGS 3,
Exposed
Current and FutureSite Users
t
49
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Record of DecisionUnit 17
Site 42- Bay
TableSummary Justification for Eliminating Human Exposure Pathways-Site 42
NAS PensacolaPensacola, Florida
Potentially Exposed Medium and Exposure Pathway SelectedPopulation for Evaluation Reason for Selection or Exclusion
Sediment -Dermal Swimming is Beach.Site 42 sediment is submerged year-round.
assessing sediment exposureas if it were soil would not be appropriate.
exposure pathway waswith
Supplemental Guidance RAGS Bulletin 3,Assessment
Wild game or domestic No Fishing and crabbing do occur in area. t
animals - Ingestion of A study conducted at Site (OU 13)tissue impacted by media concluded that there was no excess riskcontamination from consuming edible crab tissue.
Fruits and vegetables- N O Site 42 contains soil. Aquaculture isIngestion o f plant tissues a proposed use and would be grown in expected to be a concern at this site, relative
direct pathways considered,addition, activities would beprohibited in the ICW the CoastGuard.
Surface Water
Surface water samples taken for Site 2 (OU 13) indicate trace amounts of and the
usual metals associated with seawater- Only two compounds exceeded the federal or state criteria
in surface water. Silver exceeded the criteria in 18 of the 21 samples. the detections
may be the result of the natural salinity. The other chemical 10 ppb) was
detected and exceeded its criteria of 6.5 ppb in only one o f the samples, indicating it is not
widespread, Exposure to surface water would be limited to swimming trespassers, due to the
stringent security enforced by the Navy and Coast Guard. Pensacola Bay seawater i s not
potable because of the natural salinity
50
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Record of DecisionOperable Unit
Site 42- Bay . . .. . . . .
Fishing and CrabbingFishing and crabbing are allowed and can be observed daily in Site The most likely
exposure for contaminants to humans is via fishing and crabbing. During the Site 2 RI,edible
crab tissue was collected in Site 42 and Site The study concluded there is no excess
from the consumption of edible crab tissue. The results of that study are summarized in
Section 6 2 + 2 ,
Future Land Use lands are owned by the State of Florida. Future land use at NAS
Site 42 to boating, and exposure will be limited by the physical factors discussed
above
Carcinogenicity and
USEPA established a classification system for rating the potential carcinogenicity of
contaminants based on the weight of scientific evidence The cancer classes are
described below Cancer weight-of-evidence class (human carcinogens) means that human
toxicological data have shown a proven correlation between exposure and the onset of cancer (in
varying + The 1 classification indicates that human exposure studies have
implicated the compound as a probable carcinogen. class indicates a
possible human carcinogen, a description based on positive laboratory animal data (fur
carcinogenicity) in the absence of human data. Weight-of-evidence class identifies possible
human and indicates a compound not classifiable with respect to it
The USEPA has established slope factors for carcinogeniccarcinogenic potential
compounds as a "plausible upper-bound of the probability of a response (cancer) per
intake of a over a lifetime."
51
Record of DecisionNAS Unit
42- Buy6, 1998
In addition to potential carcinogenic effects most substances can produce systemic toxic
responses at doses greater than experimentally derived threshold levels. For these substances,
USEPA has derived Reference Dose values. A chronic as “anestimate (with
uncertainty spanning perhaps an order of magnitude or greater) of a daily exposure level for the
population, including sensitive subpopulations, that is likely to be without an appreciable
effects during a lifetime. These toxicological values are used risk formulae
to assess the upper-bound level of cancer risk and hazard associated with exposure to
a given contamination concentrations
For carcinogens, the potential risk posed by a chemical is computed by multiplying the chronic
daily intake as by the (in reciprocal The hazard quotient (for
is computed by dividing the by the The has set standard limits
(or points of departure) for carcinogens and noncarcinogens to evaluate whether significant risk
is posed by a (or combination of chemicals). For carcinogens, the point-ofdeparture
range is with a generally excepted range of to risk values correlate
with 1 in and 1 in million excess cancer incidence resulting from exposure to
For other toxic effects are generally considered possible if the hazard quotient
(or sum of hazard quotients for a pathway - that is, the hazard index) exceeds unity (a value of
Although both risk and noncancer hazard are generally additive (within each target
group) only if the target organ i s to multiple chemicals, a most
estimate of each may be obtained by summing the individual risks or hazards regardless of target
organ. This BRA has taken the universal summation approach for each class of toxicant.
52
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Record Decision17
42-Pernucola Bay
6.2.2 Tissue Pathway
During the Site 2 edible crab tissue was collected in Site 42 and Site 2. That data is
summarized in Table 6-5. Exposure to this tissue was evaluated under one scenario: current and
site fisherman ingesting shellfish 20 for days per
Table 6-6 presents the calculated risk and hazard for the tissue exposure pathways. As shown in
the below, an ILCR of 3x106 (rounded) was identified for possible carcinogens detected
Hazard indices of and 0.2 were calculated for child and adult exposure to Site
tissues, respectively. The primary contributor ILCR was heptachlor epoxide, and the primary
contributor to was copper. No chemicals of concern were identified for this exposure
pathway. Because the ILCR for heptachlor epoxide exceeded it is important to note that
the calculations were based on the maximum concentration detected in Site 2 blue crab tissues.
An ILCR based on the arithmetic average tissue reported for heptachlor epoxide
(0.00092 would not exceed the most stringent and FDEP threshold
6.2.3 Concl
The human health exposure assessment for Site 42 indicates that a complete health risk
assessment was required for the site due to a general lack of completed exposure pathways.
Without complete exposure pathway, no risk to human health can be associated with the
ion
The one exception tu the lack of complete pathways is the ingestion of edible crab tissues collected
from the Bay+ no specific investigation of this pathway was included in the Site 42
an exhaustive performed for Site 2 included data from crab collected from Site 2 . The
results of that evaluation indicate no unacceptable risk is associated with the ingestion of crab
tissue from Bay
53
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Record of DecisionOperable 17
Site 42 - Bay6, 1998
TableRisk Projections for Based on Tissue Ingestion
NAS -Site 2Pensacola,
Potential Future Use
Silver 0.005 NA 0.1 0.05 NA
A
NA 0.24 NA NA
0.34 0.01
0.1 0.05Heptachlor epoxide 1 3
Hazard Indices
Sum ILCR
ILCRusedused
NA0.037 NA
Hazard quotientILCR Incremental lifetime excess cancer riskLWA Lifetime weighted averagechild exposure assumptionsadult exposure assumptions
Noncarcinogen-based exposure assumptionsCarcinogen-based exposure assumptionsSlope
In the only complete human exposure pathway identified at Site 2 was the ingestion of
crab No unacceptable risks were associated with this potential exposure and other
completed pathways were identified at the site. Therefore, Site 2 in not considered to present an
unacceptable risk to human
Baseline Assessment Conclusions
Risk management decisions for NAS Pensacola Site 42 based preliminary human health risk
assumptions are not warranted for sediment because of a lack of complete exposure
The only pathway to humans is through the consumption of seafood collected from
Site A study completed for Site 2 concluded that there i s excess risk from consumption o f
55
Record of DecisionOperable Unit 17
42 6, 1998
edible crab tissue. Site 2 consists of the near-shore sediments in an area where untreated industrial
wastewater had previously been discharged within Site 42. As such, it is considered to have a
much higher potential for unacceptable risk than Site 42 in general and it is appropriate to utilize
risk from Site 2 in addressing Site 42.
42 ecological risk was assessed by comparing which showed adverse effects the Site 2
environment another operable unit in Pensacola Bay, that was investigated separately from
Site 42. The Site 42 environment i s similar and comparable to the Site 2 area. Site 42 were
lower than those that showed adverse effects at Site 2, except for the area around the barge loading
dock. The constituents of concern at the barge loading dock are which are likely from
petroleum products unloaded at the dock. This contamination be further investigated under
Florida's petroleum program.
56
Record of Decision
42 -May 6, 1998
7.0 SELECTED
Based upon consideration of the requirements of CERCLA, the NCP, the human health
associated with Site 42, and public and state comments, the Navy has selected the “No
alternative as the! preferred remedial action alternative for this site. Based on the results of the
Remedial no remedial action is necessary to control residual risks associated with
the site. to human health are minimal due to a lack of completed exposure pathways to the
contamination. only completed pathway identified was exposure to edible crab tissue. No
unacceptable is associated with this pathway + Similarly, no unacceptable ecological risk is
associated with the contamination detected at Site 42 Ecological hazard quotients are generally
low and areas of potential ecological risk are sparsely distributed.
As described in the preceding sections, this determination is based on both current and reasonable
exposure scenarios under ban swimming the
area). An area of contamination at the barge loading pier will be separately addressed under
Florida’s petroleum program.
The selected alternative will attain all federal and state is cost-effective, and uses
permanent solutions to the extent practicable.
Based on the available at this time, the remedy represents the best balance among the
criteria used to evaluate remedies. The remedy is believed to be protective of human health and
the environment, will attain will be cost-effective, and will use permanent solutions and
alternative treatment technologies or resource recovery technologies to the extent
practicable
57
employing treatment that and significantly reduces the volume, toxicity or mobility
Record of Decision
8.0 STATUTORY DETERMINATIONS
Section 121 42 9621
6, 1998
the Navy must select remedies that are protective
of human and the comply (unless a statutory waiver i s justified),
cost-effective.,and use solutions and technologies or resource
technologies to the maximum extent practicable In addition, CERCLA prefers remedies
of hazardous wastes as i t s principal element. The following sections discuss how the selected
remedy at Site 42 meets these statutory requirements.
8.1 of Health and the
The selected protects human health and the Based on current and reasonable
maximum exposure scenarios, no unacceptable human health ecological risks are
associated with existing conditions at Site 42.
of the
to CERCLA Section the remedial action for Site 42 must comply with federal
and state laws that are either applicable or relevant and appropriate to the
of the App icable requirements are those standards criteria, or limitations
promulgated under federal state law that specifically address a hazardous substance, a 4
contaminant, action, location, or other circumstance at a site. Relevant and
appropriate are those that, while not legally applicable still address problems or
situations to those encountered that their use is well-suited to the
particular site. Additional criteria to be considered are advisories and
guidance that are: not legally binding. but provide pertinent guidance which should be considered
in tlhe necessary level of cleanup to protect health or the
58
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Record DecisionOperable Unit
42 Bay6,
M are considered in three distinct categories, although there is often overlap
among the three:
with solid and hazardous waste facility siting criteria. No location-specific or TBCs were
are identified for the selected remedy
Action-specific are or requirements or limitations on actions
taken with respect to hazardous wastes. These requirements are triggered by the particular
remedial activities that are selected to accomplish a remedy. Since there are usually several
for any remedial site, various requirements can be No
ARARs or TBCs were identified for the selected remedy.
Chemical-specific: are specific numerical quantity restrictions on individual chemicals in
of chemical-specific the Maximum Levels specified under the Safe Drinking Water Act. there axe numerous
of concern
Chemical-specific ARARs and TBCs for the selected remedy are presented in Table
Tableand TBCs for Selected Remedy
Appl able Class IIE Waters designation (applicable Bay)
TBC Guidance RAGS: Region 4 - Screening Values (SedimentRegion Atlanta, GA, November 1995.
'
TBC the Assessment Quality in Coastal Waters, FDEP Office ofWater Policy, Tallahassee, FL,
are restrictions placed on the concentration of hazardous substances or
the conduct of activities solely on the basis of location. Examples of
+
for remedial site various numerical quantity can be ARARs
59
Record of DecisionNAS Operable
Site 42 -
The selected remedy complies with and identified Table There are no
action- or location-specific ARARs with which the
8.3
The “No Action” alternative is cost effective
8.4 Use of Permanent to the Maximum Extent Practicable
The Navy, USEPA and Florida concurrence, has determined that the selected remedy
represents the extent to which solutions and treatment technologies can be
used in a cost-effective manner for of Site 42 at NAS The Navy, with
USEPA and Florida concurrence, has determined that this selected remedy provides the best
balance of in terms of long-term effectiveness and permanence; reduction in toxicity,
or through treatment; short-term effectiveness; ; and
cost while also considering the statutory preference for treatment as a principal element and
consideration of’state and community acceptance The selected remedy provides for long-term
effectiveness permanence; is easily implemented; reduces toxicity mobility or volume; and
is
8.5 Preference for Treatment as a Principal
The selected does utilize treatment as a principal element of the remedial action. In
instance, the!data generated during the indicate further action is necessary to reduce The statutorycontamination to acceptable risk-based concentrations in a
preference for remedies that employ treatment as a principal element does not require treatment
under these circumstances
Record of Decision
6, 1998
9.0 OF NO SIGNIFICANT CHANGES
The proposed released on December 8, 1997 identified the no-action alternative
The no-action alternative presented in the proposed plan the
as the no-action alternative described in ROD, No comments were received the public +
61
Record of Decision
10.0 REFERENCES
Collard, Water Improvement and Management Pensacoh
System, Biological Current Northwest Florida Water Management
District + Water Resources Special Report 91-3
& (1996)+ Remedial Investigation Site 2, Pensacoh,
Memphis Tennessee.
(1997). FinalRemedial Investigation Site 38, NAS Pensacoh,
Pensacoh, Florida. : Memphis
Long, Smith, and F.D. Calder. (1995). Incidence of Adverse
Effects Within Ranges of Chemical Concentrations in Marine and Estuarine
Sediments Environmental Management
(1993). Development of Approach to the Assessment of Sediment
in Coastal Waters.
Southern Division, Naval Facilities Engineering Command. (1997). FY 1998 Site Management
Plan the Installation Restoration Program for the Air
Florida
Region Bulletins, Ecological Risk Assessment, Environmental Protection
Agency, Region IV, Atlanta, GA.
WP5 I ROD\ A
62
Appendix A
Glossary
glossary defines used in this record of decision describing CERCLA activities. The
definitions apply specifically to this record of decision and may have meanings when used
in different circumstances
RECORD: A file which contains all used by the lead agency
to make its decision in selecting a response action under CERCLA. This file i s to be available for a copy is to be established at or near the site, usually at one of the information
repositories Also a duplicate i s in a central location, such as a regional or state office.
AQUIFER: An underground formation of materials such as sand, gravel that can store
groundwater wells and springs. Most aquifers used the United States are within
a thousand feet of the earth's surface.
BASELINE RISK ASSESSMENT: A study conducted as a supplement to a remedial
investigation to determine the nature and extent of contamination at a site and the risks
posed to public health the environment
CARCINOGEN: A substance that can cause cancer.
CLEANUP: Actions taken to deal with a release or threatened release of hazardous substances
that could affect public health the environment + The "cleanup" is often used broadly
to describe various response actions or phases of remedial responses such as Remedial
Study
COMMENT A time during which the public can review and comment on various
documents and actions taken, either by the Department of Defense installation or For
example, a comment period is provided when USEPA proposes to add sites to the National
Priorities List.
COMMUNITY RELATIONS: and subsequently Naval Air Station
program to inform and involve the public in the Superfund process and respond to community
concerns
COMPREHENSIVE ENVIRONMENTAL RESPONSE, COMPENSATION,
LIABILITY A federal passed 1980 and modified 1986 by the
Superfund Amendments and Reauthorization Act (SARA). The act created a special tax that goes
into a trust fund, commonly known as "Superfund," to investigate and clean up abandoned or
uncontrolled hanardous waste sites
Under the program the can either:
Pay for site cleanup when parties responsible for the contamination cannot be located
are unable to perform the work.
Take legal action force parties responsible for site contamination to clean up the site
pay back the federal government for the cost of the cleanup.
DEFENSE ENVIRONMENTAL RESTORATION ACCOUNT (DERA): An account
established by to fund hazardous waste site cleanups, building demolition, and
hazardous waste minimization. The account was established under S A R A .
STANDARDS: Standards for quality of water that are set by both
the USEPA and the FDEP.
EXPLANATION OF DIFFERENCES: After adoption of final remedial action plan, if any
remedial or enforcement action is taken, or if any settlement or consent decree is entered into, and
if the settlement or decree differs significantly from the final plan, the lead agency is required to
publish an explanation of any significant differences and why they were made.
FEASIBILITY STUDY: See Remedial Study.
Water beneath the earth's surface that pores between materials such as
sand, soil, or gravel. aquifers, groundwater occurs quantities sufficient for use as drinking
water, irrigation, and other purposes
HAZARD RANKING SYSTEM A scoring system used to evaluate potential relative
and the environment from releases or threatened releases of hazardous
substances, and states use the HRS to calculate a site score, from 0 to based on the
actual or potential release of hazardous substances from a site through air, surface water, or
groundwater to affect people. This score is the primary factor used to decide if a hazardous site should be placed on the
HAZARDOUS SUBSTANCES: Any material that poses a threat to public health the
environment Typical hazardous substances are materials that are corrosive, ignitable,
explosive, or chemically reactive.
INFORMATION REPOSITORY: A file containing information, technical reports, and
reference documents regarding a Superfund site. Information repositories for Naval Air Station
are located at the John Pace Library, University of West Florida; and the
NAS Library, Building 633 Naval Air Station, Pensacola, Florida.
MAXIMUM CONTAMINANT LEVEL: National standards for acceptable concentrations of
contaminants in drinking water These standards are legally enforceable standards set by the
USEPA under Safe Drinking Water Act.
MONITORING WELLS: drilled at specific locations on off a hazardous waste site
where groundwater can be sampled at selected depths and studied to assess the groundwater flow
direction and the: types and amounts of contaminants present,
NATIONAL LIST The of the most serious uncontrolled abandoned hazardous waste sites identified for possible long-term remedial response using money
Ranking System. is required to update the NPL at least once a year.
PARTS PER BILLION PER MILLION (ppm): Units commonly used to express
low concentrations of contaminants. For example, 1 ounce of trichloroethylene in a ppm; I ounce of trichloroethylene in a billion ounces of water is If
one drop of trichloroethylene i s in a competition-size the water will contain
about ppb o f trichloroethylene.
GOALS: concentrations that are provided by the
USEPA and the FDEP and used to assess the site for comparison before remedial goals are set
during the baseline risk assessment +
PROPOSED A public participation requirement of SARA in which the lead agency
public the preferred cleanup strategy, and the rationale for the preference,
reviews the alternatives presented in the detailed analysis of the remedial
study, and presents any waivers to clean up standards of Section that may be proposed.
This may be prepared either as a fact sheet or as a separate document. In either case, it must
actively solicit public review and comment all alternatives under agency consideration.
RECORD OF DECISION (ROD): A public document that explains which cleanup
generated during remedial study and consideration of public comments
and community
REMEDIAL ACTION The actual construction implementation phase that follows the
remedial design and the selected cleanup alternative at a site on the
studies usually performed at the same time, and together referred to as the They are
intended to: (1) gather the data necessary to determine the type and extent of contamination at a
site; (2 ) establish criteria for cleaning up the site; (3) identify and screen cleanup
alternatives for remedial action; and (4) analyze in detail the technology and costs of the
alternatives in
RESPONSE: A long-term action that stops or substantially reduces a release
threatened release of hazardous substances that is serious, but dose not pose an immediate threat
to public health the environment.
REMOVAL ACTION: An immediate action performed to address a release or threatened release
of substances.
RESOURCE CONSERVATION AND RECOVERY ACT A federal law that
established a regulatory system to track hazardous substances the of generation to
disposal. The law requires safe and secure procedures to be used in treating, transporting,
and disposing of hazardous substances+RCRA is designed to prevent new, uncontrolled hazardous
waste sites.
RESPONSE ACTION: As defined by Section of CERCLA, a response action means
remove or remedial action, including enforcement activities related thereto +
SUMMARY: A summary of oral and written public received
by the lead agency during a comment period on key documents, and the response to these
comments prepared by the lead agency. The responsiveness summary is a key part of the ROD,
highlighting community for USEPA
SECONDARY DRINKING WATER STANDARDS: Secondary drinking water regulations are set by the USEPA and the FDEP. These guidelines are not designed to protect public health;
instead they are intended to protect "public welfare' by providing guidelines regarding the taste,
odor, color, and other aesthetic aspects of drinking water which do no present a health risk.
past hazardous waste disposal sites and current releases or threats of releases of non-petroleum
products Superfund is often divided into removal, remedial and enforcement components
enacted October 17, to reauthorize the funding provisions, and amend the authorities
and requirements of CERCLA and associated laws. Section of S A R A requires that all federal
comply with, t h i s act the same manner and the same extent as any
non-governmental entity
WATER: Bodies of water are such as rivers, lakes, and
VOLATILE ORGANIC COMPOUND: An organic compound that
evaporates (volatilizes) readily at temperature
Appendix B Responsiveness Summary
Overview
At the time of the public period, the Navy had selected a preferred remedy to
was in coordination with the and the FDEP. The NAS Pensacola
Restoration Advisory Board, a group of volunteers, reviewed the details of
the selected remedy and raised no fundamental objections to its selection.
The sections below describe the background of involvement on the project and
received during the public comment period.
Background of Community Involvement
the site's the community has been kept abreast of site activities through press
releases to the newspaper and television stations reporting site activities
available to the public in the administrative record at information
repositories maintained at the NAS Pensacola Library and the John Pace Library of the
University of West Florida.
In December 1997, newspaper announcements were placed to the public comment period
(December 1997 through 22, present the for a public meeting, and
included a short synopsis of the proposed These advertisements ran in the
on 12, In conjunction with these newspaper announcements, addresses
on the Site 42 mailing were sent the proposed plan.
were
•
SUllmlary of COIllltlents Received During the Public Comment Period
were
•
SUllmlary of COIllltlents Received During the Public Comment Period
were No comments received during the public comment period,
