FIO SB80 Env Hazard Management Plan.pdf

U.S

For

Final E

. Army Envi West Ov

2450 Conne rt Sam Hous

Environ

CC

Com

Co ironmental C versight Bran l Road, Bldg ston, TX 782 nmental

CSB0004

Hawa mpliance

Oahu ontract No.:

Delivery

Pre

Command nch g 2264 234-7664

Pre

WESTON S

841 Bishop

Honol

A

Hazard

4 80-5 U aii Phase

Related u, Hawa

W91ZLK-0

y Order No.:0 epared For:

O epared By:

SOLUTION

p Street, Suit lulu, HI 968

April 2012 d Manag

UST Site e II d Cleanu aii

05-D-0018

Office of the U.S. Arm 851 Wrig

Schofield

NS, INC.

te 2301 gement P e up e Garrison C my Garrison, ght Avenue, d Barracks, H

Plan

Commander Hawaii

WAAF

HI 96857

This page intentionally left blank.

Hawaii MMRP Phase II Final Environmental Hazard Management Plan

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W91ZLK-05-D-0018 i Final Delivery Order 0002 April 2012

TABLE OF CONTENTS

1.0 Introduction ..................................................................................................................... 1-1

2.0 Background ..................................................................................................................... 2-1

2.1 Site Location and Setting .............................................................................................. 2-1

2.2 Site History .................................................................................................................... 2-2

3.0 Hazard Management ...................................................................................................... 3-1

3.1 Asphalt Cap ................................................................................................................... 3-1

3.2 Development and Future Land Use ............................................................................... 3-1

3.2.1 Engineering Controls ............................................................................................. 3-1

3.2.2 Soil Management ................................................................................................... 3-1

3.2.3 Water Management ................................................................................................ 3-7

3.2.4 Soil Vapor .............................................................................................................. 3-7

4.0 References ........................................................................................................................ 4-1

LIST OF TABLES

Table 3-1 Environmental Hazards Associated with Future C/I Land Use ............................. 3-3

LIST OF FIGURES

Figure 2-1 Site Location Map .................................................................................................. 2-3 Figure 2-2 Site Vicinity Map ................................................................................................... 2-5 Figure 2-3 Site Location Map .................................................................................................. 2-7 Figure 3-1 Hazard Management Area ..................................................................................... 3-5

LIST OF APPENDICIES

Appendix A Remedial Design Construction Completion Report (CD Only) Appendix B HDOH No Further Action with EHMP Recommendation

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W91ZLK-05-D-0018 ii Final Delivery Order 0002 April 2012

LIST OF ACRONYMS AND ABBREVIATIONS

AAFES Army and Air Force Exchange Services

AEC United States Army Environmental Command bgs below ground surface

BTEX Benzene, Toluene, Ethylbenzene, and Xylenes

COC Chemicals of Concern

DPW Directorate of Public Works

EHMP Environmental Hazard Management Plan

HAR Hawaii Administrative Rules

HDOH Hawaii Department of Health

HEER Hazard Evaluation and Emergency Response

KyA Kunia Silty Clay

MtBE Methyl tert-Butyl Ether

OSHA Occupational Safety and Health Association

PID Photo Ionization Detector

REC Record of Environmental Consideration

SHWB Solid and Hazardous Waste Branch

TGM Technical Guidance Manual

TPH-GRO Total Petroleum Hydrocarbons Gasoline Range Organics

USAG-HI United States Army Garrison Hawaii

UST Underground Storage Tank

WESTON Weston Solutions, Inc.

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W91ZLK-05-D-0018 1-1 Final Delivery Order 0002 April 2012

1.0 INTRODUCTION

Weston Solutions, Inc. (WESTON®), under contract agreement number W91ZLK-05-D-0018, Delivery Order number 0002 with the United States Army Environmental Command (AEC), has prepared this Final Environmental Hazard Management Plan (EHMP) for the United States Army Garrison Hawaii (USAG-HI) based on WESTON’s Final Site Characterization Report and completed Remedial Design (Appendix A) for site CCSB0004 80-5 Underground Storage Tank (UST) Site located at Schofield Barracks, Oahu, Hawaii. The site will be referenced as “SB 80- 5” for the duration of this EHMP. USAG-HI is working with the Hawaii Department of Health (HDOH) Solid and Hazardous Waste Branch (SHWB) to manage and mitigate the potential hazards associated with SB 80-5 and close the site with a No Further Action with EHMP recommendation (Appendix B).

The tentatively identified hazards associated with SB 80-5 include contaminant migration due to infiltration of rainwater within the UST island, and exposure to potentially impacted soil directly below the UST’s. Chemicals of concern (COC) associated with potential site hazards include:

total petroleum hydrocarbons gasoline range organics (TPH-GRO), benzene, toluene, ethylbenzene, xylenes (BTEX) and methyl tert-butyl ether (MtBE). The contaminant migration hazard has been mitigated by the construction of an impermeable asphalt cap on the UST island.

Development (construction, demolition, maintenance etc.) and future land use that requires direct contact with impacted soils should be managed in accordance with this EHMP (WESTON, 2011). This EHMP will be incorporated into the Installation Master Plan to ensure that the hazards are addressed if the asphalt cap is modified or direct contact with impacted soils is necessary. The Directorate of Public Works (DPW) Record of Environmental Consideration (REC) approval process will be used to identify future projects that have the potential to disturb the asphalt cap.

The purpose of an EHMP is threefold: 1) document the extent and magnitude of contaminated soil left in place at a site, 2) summarize identified environmental concerns posed by the contamination and 3) provide a framework for long-term management of the contamination (HDOH, 2007). The procedures in this EHMP must be followed for the management of the asphalt cap and potentially impacted soil that may be encountered during development and future land use activities. The EHMP should be supplemental to any construction, demolition and/or future land use plans including but not limited to Work Plans, Best Management Practices, and Health and Safety Plans (site plans) associated with SB 80-5. All contractors’ have the responsibility to manage their operations in a safe manner and in compliance with all State and Federal occupational health and safety and environmental requirements.

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W91ZLK-05-D-0018 1-2 Final Delivery Order 0002 April 2012

This Final EHMP was developed utilizing guidance from the HDOH Office of Hazard Evaluation and Emergency Response (HEER) Technical Guidance Manual (TGM) interim final dated 21 June 2009. The Final EHMP sections are presented as follows:

Section 1 – Introduction

Section 2 – Site Location and Setting

Section 3 – Hazard Management

Section 4 – Reference

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W91ZLK-05-D-0018 2-1 Final Delivery Order 0002 April 2012

2.0 BACKGROUND

The following sections describe SB 80-5’s location, climate, geology, hydrology and site history.

2.1 Site Location and Setting

Schofield Barracks is located on the central plateau (also known as the Schofield Plateau) of Oahu, Hawaii (Figure 2-1) and is home to the Army’s 25th Infantry Division, also known as the Tropic Lightning Division. SB 80-5 is located near the Foote Gate entrance to Schofield Barracks, within the Army and Air Force Exchange Services (AAFES) Car Care Center. The Car Care Center is located on the south side of Foote Avenue near the intersection of Foote Avenue and Kunia Road (Figure 2-2). The Car Care Center is operated by AAFES and provides petroleum fuels and automotive services to military personnel and their dependents.

The SB 80-5 site has been used as a fueling station since 1957, with the current facilities being constructed in 1986. The former fuel station was located just to the northeast of the current Car Care Center building (E2, 2009). During construction in 1986 the current gas station layout was established, which included five double walled fiberglass-reinforced plastic 10,000-gallon gasoline tanks and a sixth double walled fiberglass-reinforced plastic 10,000-gallon diesel tank.

The tanks are located to the south of the fuel dispensers within the asphalt capped UST island near the parking lot.

The climate of Schofield Barracks area is characterized by moderate temperatures, which remain relatively constant throughout the year. Average daily temperatures range from a mean low temperature of 60 °F in February to a mean high temperature of 83°F in September. The average annual rainfall in the vicinity of Schofield Barracks is 68 inches, of which more than half occurs during the wet season from November through February (HCS, 2009).

Schofield Barracks is located in the physiographic province known as the Schofield Plateau, which is bounded on the east by the Koolau Mountain Range and on the west by the Waianae Mountain Range. Surficial material at Schofield Barracks consists of soil formed by in-situ geochemical decomposition and weathering of the basaltic bedrock, which has reached depths of approximately 100 to 200 feet bgs. The decomposition and weathering has resulted in the formation of residual surface soil underlain by saprolite. Locally, boulders within the saprolite represent remnants of massive portions of lava flows. The decomposed rock grades, with depth, from a structure less soil in the upper five to ten feet into saprolite containing features of the original rock texture and structure, such as vesicles and fractures (HLA, 1992).

Soils at SB 80-5 are comprised primarily of the Kunia Series, more specifically Kunia Silty Clay (KyA). The Kunia Series is found on the foot of the slopes of the Waianae range, and are geographically associated with Kolekole, Lahaina, and Wahiawa soils. These soils are well-drained, permeability is moderate, runoff is slow, and the erosion hazard is no more than slight

(USDA, 1972).

SB 80-5 overlies the Schofield High-Level Water Body (SHLWB) of the Central Aquifer Sector.

This aquifer consists of a high level, unconfined, dike-type aquifer system of dike impounded freshwater. This aquifer is currently used as a drinking water source, is irreplaceable, and has a high vulnerability to contamination (Mink and Lau, 1990). The primary source of freshwater

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W91ZLK-05-D-0018 2-2 Final Delivery Order 0002 April 2012 recharge to the SHLWB is underflow from higher elevations in the eastern part of the Schofield Plateau, the upper slopes of the Koolau Mountain Range, and the upper slopes of the Waianae Mountain Range. The Koolau Mountain Range is generally considered the major source of freshwater recharge.

The nearest surface water bodies include Wahiawa Reservoir which is approximately 2,000 feet northeast of SB 80-5 and Waikele Stream which is approximately 3,000 feet southwest of SB 80-

5. During rainfall events storm water flows in a southeasterly direction with eventual drainage to the local storm drain conveyance system. There are three storm drain inlets on site between 50 feet to 175 feet north of SB 80-5, and approximately four shallow swales to the south. The storm drain outlet and four shallow swales converge approximately 300 feet south-southwest of SB 80- 5, and storm water continues in the southwesterly direction along Kunia Road.

2.2 Site History

One of the five 10,000-gallon gasoline USTs (SB 80-5) in the UST island (southeast side) failed a leak detection test in 1992 and was taken out of service (Figure 2-3) in 1994. Taking the tank out of service included exposing the tank, disconnecting and capping the piping, cleaning the tank, and collecting soil samples from beneath the tank. The tank was closed in place in 1998 by filling it with limestone sand. Subsequent environmental investigations conducted at SB 80-5 detected evidence of petroleum impacted soil in the subsurface. There is no record of a large loss of fuel or actual leaking from SB 80-5 and it is not known where or when the tank leak occurred (E2, 2009).

On 20 August 2009, an inadvertent release of petroleum (HDOH release ID No. 090031) occurred at UST SB 80-1. The release occurred inside the fill port vault for SB 80-1. It was determined that any hazards associated with the SB 80-1 release would be mitigated by the remedial action for SB 80-5 and implementation of this EHMP.

Remedial activities including the construction of the asphalt cap was conducted by WESTON between 30 August 2011 and 05 October 2011. The cap consists of compacted base course with a minimum thickness of four inches and compacted asphalt (State Mix V) with a minimum thickness of two inches.

SB 80-5 is currently an active gas station within the AAFES Car Care Center and provides petroleum fuels and automotive services to military personnel and their dependents. The gas station has a canopy covering the six dispenser islands that include 12 gasoline dispensers and one diesel dispenser. SB 80-5 is zoned for commercial/industrial use, which is unlikely to change in the foreseeable future.

o o

8o

6o

0o

PA

C

IF

IC

O C

AN

Ka ua i Ni ih au

Oa hu

M au i

M ol ok ai

La na i Ka ho ol aw e Ha w ai i

HA

W

AI

I

LO

CA

TI

ON

M

AP

W A

I A

A

R A

N G E

K O

O L A U

R A G E

M a ini Gl

W ai m ea

G

Hu l ai Gl aloi l

H no l u i l

Kau na la Gl am na nu i

S r

Malaekana Str

KaluauiSr Punl

St r ahan a

Str aunawiliStr

P lo lo

Sr

ManoaStr

Kaihi

S r

M oa na lu a St r N

Hal aw

St r

W im al u tr ai m an o

St r ip ap

S r

Nanauli St r

Mailii lii

S r a k ua

St

Maka l ha Str

K au on a u

Str oa m o

St r o t

Fo k pa e u la St

A a ul i v r akha

St r

K up uniSr

W ai ke le

Str

Waia a

Str

OioStr

H el e an o St r

So u th Fo rk

H al aw a

St

W ai he eSt r

Nu an

S tr

Ala Wai

Can al

Ka ne oh e

S tr

Kahalu u

Str

W ah ia w a Re se rv oi r

W ai m an al o

Ba y

KA

NE

OH

E

BA

Y

Ka ha na Ba y

Pe ar l

H bo r

M

AM

AL

A

B

AY

M au na lu a B ay

8o 10

7o 50

7o 40 o 40 o 30 o 20

8o

C E

N T

R A

L W

I N

D W

A R

D

H O

N O

L U

L U

W A

I A

N

E

HO

NO

LU

LU

W ai ki ki

Ka ilu a

Ka ne oh e

M ak ah a W ai an ae M ai li

Na na ku li

Ew a

Be ac h

Ew a

W ai al uaHa le iw a

Su ns et Be ac h

Ka hu ku

La ie

Ka aa w a

W ai m an al o

Ha w ai i

Ka i

Ai na

Ha in a

W ai pa hu

W ai pi o

M ili la ni

Sc ho fie ld

Ba rra ck s

W ah ia w a

Ka hu ku P oi nt

M ak ap uu

Po in t

Ba rb er s

Po in t

Di am on d

He ad

Ko ko

H ea d

Pu nc hb ow l

Ka en a Po in t

Ai ea

0 0

M

IL

ES

KI

LO

M

ET

ER

S

S.

M ac M ill an

NO

VE

M

BE

R

NO

VE

M

BE

R

W

ZL

K-

-D

-0

S.

M ac M ill an

SB

0-

EN

VI

RO

NM

EN

TA

L H

AZ

AR

D M

AN

AG

EM

EN

T

PL

AN

SC

H

OF

IE

LD

B

AR

RA

CK

S, O

AH

U

, H

AW

AI

I

Si te

L oc at io n M ap

2-

Re fe re nc e:

B as e m od ifi ed fr om

U .S

. G eo lo gi ca l S ur ve y Na tio na l H yd ro gr ap hy

D at as et

, A lb er s eq ua l a re a pr oj ec tio n, s ta nd ar d pa ra lle ls

1°

’4 0” a nd

1°

’2

0” ce nt ra l m er id ia n

7° da tu m N

AD

. R el ie f f ro m

U .S

Ge ol og ic al

S ur ve y di gi ta l e le va tio n m od el s, :2

4, EX

PL

AN

AT

IO

N

BO

UN

DA

RY

B

ET

W

EE

N

P

HY

SI

OG

RA

PH

IC

Z

ON

ES

TO

PO

GR

AP

HI

C

DI

VI

DE

ND

OU

ND

AR

Y

BE

TW

EE

N

P

HY

SI

OG

RA

PH

IC

Z

ON

ES

Si te

L oc at io n aw ai i M

M R

P P ha se

I I

Fi na l E nv ir on m en ta l H az ar d M an ag em en t P la

SB

0-

Sc ho fi el d B ar ra ck s

O ah u, H aw ai i

C on tr ac t N o.

W

Z L

K -0

5- D

-0

2-

Fi na l

D el iv er y O rd er pr il

T hi s pa ge in te nt io na ll y le ft b la nk

0-

EN

VI

RO

NM

EN

TA

L

HA

ZA

RD

M

AN

AG

EM

EN

P

LA

N

SC

HO

FI

EL

D

BA

RR

AC

KS

, O

AH

U, H

AW

AI

I ai i M

M R

P P ha se

I I

F in al E nv ir on m en ta l H az ar d

M an ag em en t P

0-

S ch of ie ld B ar ra ck s

O ah u, H aw ai i

C on tr ac t N o.

W

Z L

K -0

5- D

-0

2-

F in al

D el iv er y O rd er il

Th is p ag e in te nt io na ll y le ft bl an k.

0-

EN

VI

RO

NM

EN

TA

L

HA

ZA

RD

M

AN

AG

EM

EN

T

PL

AN

SC

HO

FI

EL

D

BA

RR

AC

KS

, O

AH

U, H

AW

AI

I ai i M

M R

P P ha se

I I

F in al E nv ir on m en ta l H az ar d

M an ag em en t P

0-

S ch of ie ld B ar ra ck s

O ah u, H aw ai i

C on tr ac t N o.

W

Z L

K -0

5- D

-0

2-

F in al

D el iv er y O rd er il

Th is p ag e in te nt io na ll y le ft bl

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W91ZLK-050D00018 3-1 Final Delivery Order 0002 April 2012

3.0 HAZARD MANAGEMENT

The COC migration/infiltration hazard has been mitigated by the impermeable asphalt cap that was constructed across the UST island. The remaining impacted soil could pose a direct exposure hazard if development and future land use requires excavation to depths greater than 10 feet bgs within the UST island and around the southwest side (outside of UST island).

Development and future site use that requires this change and/or access will require the remaining contamination to be managed in accordance with this EHMP (WESTON, 2011).

COC’s and the associated environmental hazards are presented in Table 3-1. Figure 3-1 illustrates the areas in and around the UST island where potential environmental hazards exist.

3.1 Asphalt Cap

COC associated with the potential migration hazard include: TPH-GRO, BTEX and MtBE. The asphalt cap covering the UST island mitigates the migration of COC in the subsurface by impeding the infiltration of rainwater. The asphalt cap’s integrity must be maintained to mitigate the migration hazard. The cap should be visually inspected to ensure its integrity. The visual inspection should include but is not limited to observations on deformation, erosion, cracks or deterioration. Any observations made during the inspection that are deficient should be corrected immediately as maintaining the caps impermeability to rainwater infiltration is imperative.

3.2 Development and Future Land Use

The COC associated with the potential direct exposure hazard is benzene. Development and future land use activities include but are not limited to excavation, trenching, maintenance and construction. These activities should manage potentially impacted soil according to this EHMP.

3.2.1 Engineering Controls

Direct exposure pathways include, inhalation and ingestion of fugitive dust and vapors, and dermal contact with COC impacted soil and possibly impacted water (interstitial, perched etc.).

Engineering controls need to eliminate the exposure pathways for construction workers and future site users. Development of the UST island has the potential for construction workers and future site users to be exposed to impacted soil. Fugitive dust mitigation procedures and respiratory protection for site workers should be addressed in future site plans. The site plans must comply with current Hawai‘i Administrative Rules (HAR) and the Occupational Safety and Health Administration (OSHA) guidelines for each pathway and COC.

3.2.2 Soil Management

In general, petroleum impacted soil may be identified by the presence of free product, staining, and/or odor. Free product is liquid fuel in its natural state (weathered or not). Staining is not always consistent, but varies depending on the nature of the fuel, soil type, and age of the release. Staining associated with old petroleum contamination often has a greenish hue, but may

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W91ZLK-050D00018 3-2 Final Delivery Order 0002 April 2012 also be brown or black. Impacted soil at the site does not have visible signs of free product, but staining and petroleum odor are present in the vadose zone.

Soil excavated from below the UST island and the surrounding impacted area should be screened using visual and olfactory techniques and with a photo ionization detector (PID) to determine the presence of COC. Soils should be separated into non-impacted and impacted stockpiles to reduce offsite disposal volumes. Impacted soil should be contained with earthen berms lined with plastic sheeting. The stockpiles should be covered with plastic sheeting as soon as active stock piling is complete. Once the stock piles are covered the plastic sheeting should be secured with sand bags. Using berms and plastic sheeting will prevent run-on and run-off of surface waters and cross contamination with non-impacted soils.

Impacted soil stock piles must be characterized for disposal in accordance with current Federal, State, and the treatment and/or disposal facilities requirements. Potentially contaminated soil should be analyzed by a State-approved analytical laboratory for THP-GRO, benzene, toluene, ethylbenzene, total xylenes, and MtBE at a minimum.

a b le

-1

E n vi ro n m e n ta l H az a rd s

A s s o ci a te d w it h F u tu re C o m m er c ia l/ In d u s tr ia l

L an d U se

H a w ai i M M

R P

P ha se

II

F in al E nv iro nm e nt al

H a za rd

M an a ge m en t P la n

S B

0-

S ch o fie ld

B ar ra ck s O a hu

, H a w ai i

T P

H -G

R O

N o

H az d

Y s

N o ne

B e nz en e 1.

0.

M N o N on e

T o lu e ne 5.

3.

M

N o

N on e

E th yl be nz e n e

4.

1.

M N o N on e

X yl en e

.1

2.

M N o N on e

M tB

E

.0

.0

N o H a za rd

Y es

N on e

N o te s:

F u tu re la n d u se is c o m m e rc ia l/i n d u st ria l, gr ou nd w at e r is a d ri nk in g w at e r so ur ce a n d su rf a ce w at er is m et er s a w ay

H D

O H

H a w a ii

D e pa rt m e nt o f H ea lth

E

L

E nv iro n m en ta l A ct io n L ev el m g/ kg m ill ig ra m s pe r ki lo gr a m bg s be lo w g ro u nd s u rf ac e M

M ig ra tio n d ue to r ai n w at e r in fil tr at io n

B as is fo r

F in al H

D O

H C om m e rc ia l/I nd us tr ia l L a nd U se E

A L

T P

H -G

R O

T ot a l P e tr o le um

H yd ro ca rb on s G as ol in e

R an ge O rg an ic s

B o ld

E xc ee d a nc e o f H

D O

H C om m e rc ia l/I n du st ria l L an d U se E

A L

M tB

E m et hy l t e rt b u ty l e th er

S o il V a p o r

V a p or in tr us io n is n ot co ns id er ed a h az ar d si nc e th er e ar e no p er m an en t e nc lo se d st ru ct u re s in o r a ro u n d th e U

S T is la n d, a n d al ls ha llo w so il re su lts a re be lo w t he v ap or in tr u si on

E A

L

S a m p le s co lle ct e d fr o m b en e ith

U S

T

0-di d no t e xc ee d th e co m m e rc ia l/i n du st ri a l E

A L s, ho w ev e r, if p et ro le u m n im pa ct ed so il is en co un te re d be ne ith th e

U S

T is la nd t he s oi l s h ou ld b e m a na g e d in a cc o rd an ce w ith t h is

E H

M P

BelowHDOHFinal Commercial/Industrial Land UseEAL

Anticipated EnvironmentalHazard

C o n cl u si o n

Soil (Highest detected values <15 feet bgs) m g

/k g

T h e a sp ha lt ca p co ve ri ng th e U

S T is la n d m iti g at es th e m ig ra tio n ha za rd

T he ca p sh ou ld be in sp ec te d vi su a lly to en su re its in te g rit y.

T h is E

H M

P w ill b e in co rp or at e d in to th e

In st a lla tio n

M a st er

P la n to en su re th at th e id en tif ie d m ig ra tio n h az ar d is a dd re ss ed if th e as ph al t ca p is m od ifi ed ca p in te gr ity

M d ia

C h em ic a l o f C o n ce rn

U n it s

MaximumDetection (at15'bgs)

HDOHFinal Commercial/Industrial Land UseEAL

TentativeEnvironmental Hazard

G ro u n d w at er

S h al lo w pe rc h e d g ro un dw at e r w a s no t en co un te re d in an y o f th e bo ri ng s du ri ng ch ar ac te riz at io n a ct iv iti es

D ep th to b as al g ro un dw at er is ap pr ox im at e ly fe et bg s an d w as n ot in ve st ig at ed

R eg io n a lg ro u nd w at e r is kn o w n to b e im pa ct ed w ith pe tr ol e um pr od uc ts so lv en ts an d pe st ic id e s.

C o nt am in an t m ig ra tio n fr om

S B

-5 is n ot c o n si de re d to b e a c on tr ib u tin g so u rc e to th e b as al a qu ife r co n ta m in a tio n.

ai i M

M R

P P ha se

I I

Fi na l E nv ir on m en ta l H az ar d M an ag em en t P

0-

Sc ho fi el d B ar ra ck s

O ah u, H aw ai i

C on tr ac t N o.

W

Z L

K -0

D

3-

Fi na l

D el iv er y O rd er il hi s pa ge in te nt io na ll y le ft b la nk ai i M

M R

P P ha se

I I

F in al E nv ir on m en ta l H az ar d

M an ag em en t P

0-

S ch of ie ld B ar ra ck s

O ah u, H aw ai i

C on tr ac t N o.

W

Z L

K -0

D

3-

F in al

D el iv er y O rd er il

Th is p ag e in te nt io na ll y le ft bl

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W91ZLK-050D00018 3-7 Final Delivery Order 0002 April 2012

3.2.3 Water Management

Current data and observations do not indicate that there is perched water in subsurface soils. In general, petroleum impacted water can be identified as having a sheen (rainbow) on the surface and/or a petroleum odor. Contractors who come in contact with water (interstitial and/or perched) should screen the water using visual and olfactory techniques. If visual and olfactory techniques indicate water has been impacted by the potentially impacted soil, it should be further analyzed by a State-approved analytical laboratory for THP-GRO, benzene, toluene, ethylbenzene, total xylenes, and MtBE at a minimum.

3.2.4 Soil Vapor

Vapor intrusion is not a hazard since there are no permanent enclosed structures in or around the UST island. Furthermore, shallow impacted soil does not exceed the vapor intrusion EAL.

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W91ZLK-050D00018 3-8 Final Delivery Order 0002 April 2012

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W91ZLK-050D00018 4-1 Final Delivery Order 0002 April 2012

4.0 REFERENCES

Element Environmental, LLC. (E2) 2009. Final Report UST SB 80-5 Remedial Investigation Schofield Barracks, Oahu, Hawaii. May 2009

Hawaii Climate Summaries (HCS). 1961 - 2005 Western Regional Climate Center. 3 September, 2009. <http://www.wrcc.dri.edu/cgi-bin/cliMAIN.pl?hihobs>

HDOH. 2007. Long-Term Management of Petroleum-Contaminated Soil and Groundwater. June 2007.

Harding Lawson and Associates (HLA). 1992. Final RI/1FS Stage 2 Technical Report, Installation Restoration Program for Hickam Air Force Base Petroleum, Oil, and Lubricant Storage Annexes and Pipeline, Oahu, Hawaii. Contract No. F33615-85-D4536, Delivery Order 007.

Mink, J.F. and Lau, S. 1990. Aquifer Identification and Classification for the Island of Oahu Groundwater Protection Strategy for Hawaii. Water Resources Research Center, University of Hawaii. Technical Report 186. February 1990.

United States Department of Agriculture Soil Conservation Service (USDA), 1973, Soil Survey of the Islands of Kauai, Oahu, Maui, Molokai and Lanai, State of Hawaii.

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W91ZLK-050D00018 4-2 Final

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W9ZLK-05-D-0018 Final

Appendix A Remedial Design Construction Completion Report (CD Only)

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W9ZLK-05-D-0018 Final

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W9ZLK-05-D-0018 Final

Appendix B HDOH No Further Action with EHMP Recommendation

SB 80-5

Schofield Barracks

Oahu, Hawaii

Contract No. W9ZLK-05-D-0018 Final