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Phase II Subsurface InvestigationUnderground Storage Tank
UT-55(LU FT #94045)Building 05 5Santa Susana Field
LaboratoryVentura County, California
Prepared fo r
Boeing No rth American,Rocketdyne Divisio n
Prepared b y
Ogden Environmental and Energy Services Co ., Inc .5510
Morehouse Driv eSan Diego , California 92121(619) 458-9044
November 1997Project No . 313150002
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Ogden Environmental and Energy Services Co . Inc ., (Ogden) has
prepared this work plan
for Boeing North American, Inc ., Rocketdyne Division
(Rocketdyne) to conduct a
Phase II subsurface investigation at the former location of
underground storage tank
UT-55 . The UT-55 site is located at the southwestern corner of
Building 055 in Area IV
of the Santa Susana Field Laboratory (SSFL) in Ventura County,
California . This site is
under the jurisdiction of Ventura County Environmental Health
Division (VCEHD) as
Leaking Underground Fuel Tank (LUFT) Site #C94045 .
1 .0 BACKGROUND
The SSFL is located in hilly terrain along the crest of the Simi
Hills which lie between
the San Fernando Valley to the east and the Simi Valley to the
northwest . The geology of
the Simi Hills in the area of the SSFL is comprised of the
Cretaceous-age Chatsworth
Formation, consisting of sandstone bluffs with occasional
siltstone and claystone
interbeds . Sandy alluvium, also with occasional finer interbeds
of silts and clays, overlies
the Chatsworth Formation between bedrock outcrops . In the
vicinity of the Building 055
site, the alluvium is approximately 20 feet thick . The depth to
static ground water near
the site measured during November 1996 in monitoring well RD-13
was approximately
46 feet below ground surface (bgs) (Groundwater Resources
Consultants, 1997) .
Monitoring well RD-13 is completed within the Chatsworth
Formation and located
500 feet southwest of Building 055 .
UT-55 was a 1,000-gallon capacity underground tank used to store
fuel oil . It was
removed by Rocketdyne under the oversight of VCEHD on February
21, 1986 (Tank
Abandonment Permit #225) . Two soil samples were collected from
the tank excavation
and found to contain 11,000 milligrams per kilogram (mg/kg) and
13,000 mg/kg total
petroleum hydrocarbons (TPH) . The soil samples were analyzed by
the SSFL laboratory
for total extractable hydrocarbons using gas chromatography with
a solvent extraction
(modified 8015) . Based on these results, 45 cubic yards of soil
were excavated from
around the former tank location .
Four soil samples were collected from the base and sidewalls of
the excavation and
analyzed for TPH. The four sidewall samples reported TPH
concentrations at nondetect,
10, 33, and 60 mg/kg. Two other samples, presumably collected
from the bottom of
excavation, contained TPH concentrations of 1,400 mg/kg and
1,000 mg/kg (Rocketdyne,
1994) .
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A Phase I subsurface soil investigation w as conducted by A.E .
Schmidt Environmental
(AESE) during July 1995 (AESE, 1995). Two borings, UT-55-S1 and
UT-55-S2, were
drilled within the outline of the former UT-55 excavation
(Figure 1 ) . Soil samples were
collected at five foot intervals . Both boreholes encountered
bedrock at 20 feet bgs .
The 10 and 15 foot samples from each boring were selected for
chemical analysis based
on soil conditions (odor, staining, etc .) and head-space
measurements . The four soil
samples were analyzed at Curtis & Tompkins Laboratory,
located in Irvine, California,
for TPH (diesel) using U .S. Environmental Protection Agency
(EPA) Method 8015M and
for benzene, toluene, ethylbenzene, and xylenes (BTEX) using EPA
Method 8020 .
Analytical results of these samples are presented in Table 1
(AESE, 1995). TPH
concentrations of 6,100 mg/kg and 14 , 000 mg/kg were detected
in the 10 foot samples of
UT-55-S1 and UT-55-S2, respectively . Slightly elevated
concentrations of benzene,
ethylbenzene , and xylenes were also detected in these samples .
Only TPH was detected
at a concentration of 41 mg /kg in the 15 foot sample from
UT-55-SS2 .
Table 1
PHASE I SAMPLING RESULTS (JULY 1995 )
Sample TPH-diesel Benzene Toluene Ethylbenzen XylenesDesignation
(mg/kg) (µg/kg) (µg/kg) e (mg/kg) (gg/kg)
UT-55-S1-10' 6,100 ND ND 390 1,200UT-55-S1-15' ND ND ND ND
ND
UT-55-S2-10' 14,000 28 24 540 520UT-55-S2-15 41(a) ND ND ND
ND
(a) Longer chain hydrocarbons detected (> C22)ND = Not
detected
2.0 OBJECTIVE AND SCOPE
The overall objective of the proposed Phase II soil
investigation is to assess the lateral
and vertical extent of fuel-impacted soil in the area of the
former UT-55 .
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Three borings are proposed for the Phase II investigation
surrounding the former tank
location (Figure 1) . One boring will be located northwest and
another southeast of
UT-55-SS2, the previous bo ring with the highest detected
concentrations . A third boring
will be located southwest of the former tank location . Each bo
ring will be located
approximately 25 feet from the previous boring locations . These
bo ring locations are
proposed based on the overall drainage at the site because soil
thickness in this port ion of
the site generally follows the surface topography .
Soil samples will be collected at 5 foot intervals in the
subsurface until bedrock is
encountered. Soil samples will be analyzed at a
California-certified onsite mobile
laboratory for TPH using EPA Method 8015M for gasoline,
kerosene, diesel, and oil
components (C6 to C30), and for volatile organic compounds
(VOCs) using EPA Method
8021 .
If elevated concentrations are detected in the borings collected
during this investigation,
results will be discussed with a VCEHD representative and
additional step-out locations
proposed if necessary . Drilling additional step-out locations
would be performed during
the Phase II investigation since a mobile laboratory is onsite
and provide real-time
analytical results .
3.0 FIELD IMPLEMENTATION
The Phase II investigation is proposed to be conducted by Ogden
during the RCRA
Facility Investigation (RFI) field program currently being
implemented at the SSFL under
the oversight of the Department of Toxic Substances Control
(DTSC) . All field
sampling and safety protocols proposed and approved for the RFI
will be followed for the
Building 55 investigation (Ogden 1996) . The RFI Health and
Safety Plan (HSP) has been
modified to include the UT-55 site, and pertinent portions of
the HSP are provided in this
work plan (Attachment A) . Field sampling protocols proposed for
the UT-55
investigation are described below, and additional information is
available in the Standard
Operating Procedures Appendix of the RFI Work Plan (Ogden 1996)
. The drilling
subcontractor being used for the RFI is Interphase, Inc . and
the onsite state certified
laboratory analysis is being performed by Columbia Analytical
Services (CAS) .
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Prior to conducting any subsurface field activities the proposed
boring locations will be
surveyed for the possible presence of underground utilities by
Utility Locating Service
(ULS), a qualified utility locating subcontractor. Surveys will
be conducted using
electromagnetic conductivity and ground penetrating radar .
VCEHD will be notified prior to implementation of the proposed
sampling. The
proposed soil bo rings will be advanced to approximately 3 feet
bgs using a hand auger,
and then to depth using a Geoprobe d rill rig . Soil samples
will be collected at five-foot
intervals from 5 feet bgs to a depth of 20 feet bgs and every 10
foot thereafter until
bedrock is encountered . Based on site data, sampling depths are
anticipated to be 5, 10,
15, and 20 feet bgs . Additional samples will be collected if
staining is noted or lithologic
changes occur.
The soil samples will be collected using a drive sampler lined
with pre-cleaned stainless
steel tubes . The sample sleeves will be sealed with
polyethylene end caps, individually
labeled and storage at the drilling site in an insulated cooler
until transported to the
mobile laboratory . Chain of custody procedures for all sampling
will be followed and
sampling information documented in a field notebook .
The soil borings will be logged using the Untied Soils
Classification System (USCS) by a
registered geologist and recorded on a boring log . Each sample
will be screened for
VOCs in the field using a photoionizing detector (PID) . The
drilling and sampling
equipment will be cleaned using a mild detergent and rinsed
twice with de-ionized water
between boring locations .
The borings will be backfilled with bentonite clay chips and
hydrated in place . Wash
water and soil cuttings from the borings will be contained in
designated and approved
containers onsite . Storage and disposal of waste will be
managed by Rocketdyne .
One water rinsate and duplicate soil sample will be collected
during the field
investigation to ensure that correct field sampling and
laboratory analysis protocols are
followed.
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4.0 REPORTING
Data gathered during the investigation will be evaluated and
recommendations made in a
Phase II report . The report will document the procedures used
to perform the soil
investigation and sample analysis, results of the investigation,
and recommendations for
either (1) further work, or (2) no further action .
5.0 REFERENCES CITE D
Groundwater Resources Consultants, Inc . 1996 . Annual
Groundwater MonitoringReport, Santa Susana Field Laboratory, 1997 .
February.
A.E. Schmidt Environmental . 1995 . Site Assessment Report for
Underground StorageTank UT-55 (VCEHD Site #C94045) . September
.
Ogden Environmental and Energy Services Co ., Inc . 1996. RCRA
Facility InvestigationWork Plan Addendum, Santa Susana Field
Laboratory, Ventura County,California, Volumes I-III . September
.
Rockwell International Corporation, Rocketdyne Division. 1994 .
Underground TankRemoval Reports, Santa Susana Field Laboratory,
Ventura County, California,Volumes I and II . July .
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JZ AREA IV LOFTBUILDING 55 UST SIT E
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PROPOSED PHASE II SOIL SAMPLING LOCATIONSBUILDING 55 UST SITE
1
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ATTACHMENT A
RCRA FACILITY INVESTIGATIONWORK PLAN ADDENDUM
HEALTH AND SAFETY PLAN - APPENDIX DADDENDUM, NOVEMBER 1997
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This Health and Safety Plan Addendum was prepared to amend the
existing Health and SafetyPlan (HSP) dated March 1995 and the
Health and Safety Addendum dated October 1997 . Sincethe completion
of this HSP two UT sites have been added to the scope of work . The
followinginformation will accompany the existing HSP and the
addendums and the acceptance form shallbe signed by all site
personnel .
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EMERGENCY REFERENCE LIS T(Keep posted in vehicles and near
communication system )
MEDICAL EMERGENCIES* : See Hospital Route Map in Figure 1 ;
hospital route must be verifiedby the Site Health and Safety
Coordinator (SHSC) and Field Manger (FM) once onsite .
Hospital Name : West Hills Regional Medical Cente r
Hospital Address : 7300 Medical Center Dr . West Hills, CA
91307
Hospital Telephone : (818) 712-4100
Directions : From the site of incident, use the facility map to
return to front gate of the SantaSusana Field Laboratory (SSFL),
proceed down Woolsey Canyon . Turn right onto Valley CircleBlvd.
Follow Valley Circle Blvd. to Roscoe Blvd. and turn left. Follow
Roscoe Blvd . toFallbrook. Follow Fallbrook to Sherman Way and turn
right. The hospital is about a half miledown Sherman Way on the
right hand side .
CALL LIST :
Title Name Telephone Number
H&S Manager Denise Daggett (619) 458-9044 ext . 328Office
HSC Gina Kackman (619) 458-9044 ext . 24 1Project Manager,
Rocketdyne Art Lenox (818) 586-5695Rocketdyne Security (818)
586-5333Rocketdyne Health & Safety (818) 586-2275Poison Control
CenterHartford SRS*
(800) 962-1253
* In the event of an occupational accident or incident, please
indicate to the medical facility that this is a
workers' compensation case, that your employer is Ogden Allied,
and that the insurance carrier isHartford SRS. Subcontractors will
provide internal workers' comp . policy information ; this should
beprovided to the SHSC at the prework meeting .
EMERGENCY EQUIPMENT : Maintained in field vehicle (V), in the
Clean Zone (CZ), except for *items that will be kept in the
Exclusion Zone (EZ) and as applicable in the field trailer (FT).
Allitems must be checked and maintained by the SHSC at least weekly
or after used .
(x) First-aid Kit, V/FT (x) Fire Extinguisher, V/EZ ( ) Field
showers, FT or V( ) SCBA, V/FT ( ) Escape Packs ( ) Alarms*,
V/EZ(x) Spill Equipment, V ( ) Mobile Phone, V/FT ( ) Fire
Blanket*, V/EZ( ) Other (x) Hospital Route Map, V/FT
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GENERAL INFORMATIO N
Project: Resource Conservation and Recovery Act (RCRA) Facility
Investigation (RFI) at SSFL
Project Manager (PM): Dixie Hambrick
Health and Safety Manager (HSM) : Denise Daggett
Field Manager (FM):Don Barrie
Field Personnel : Don Barrie , Karen Jamieson , Tom Burton ,
Abbas Sam
Site Health and Safety Coordinator (SHSC) : Don Barrie
Subcontractors : Interphase , ULS, Columbia Laboratories
SITE DESCRIPTION AND FEATURE S
The SSFL is owned and operated by the Rocketdyne Division of
Rockwell International(Rocketdyne) and the National Aeronautics and
Space Administration (NASA) . A 90-acreportion of the SSFL owned by
Rocketdyne is leased to the U .S. Department of Energy (DoE) .The
SSFL is located 29 miles northwest of Los Angeles, California, in
the southeast corner ofVentura County . The site occupies
approximately 2,600 acres of hilly terrain, with approximately700
feet of topographic relief near the crest of the Simi Hills . The
Simi Hills are bordered on theeast by the San Fernando Valley and
to the north by the Simi Valley . The site is divided into
fouroperational areas (Areas I, II, III, and IV) and a Buffer Zone
. The site is surrounded by fences .Entrance and exit are limited
to Woolsey Canyon in the northeast corner of the site and
theentrance gate is controlled by site security officers .
Perimeter land use around SSFL is primarilyresidential with a few
farms nearby .
SCOPE OF WORK/PLANNED SITE ACTIVITIE S
The additional scope of field work at the SSFL facility includes
the following tasks :
1 . Conduct site reconnaissance of two additional areas .
2. Soil sampling . Soil sampling will be performed using a
direct-push technology .
3 . Decontamination of equipment .
4 . Management of investigative-derived waste (IDW) .
The duration of field work has been proposed for 2 weeks .
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A brief history of hazardous materials handling of the
additional sites is summarized as follows :
Site Site HistoryB55, UT-55 The UT-55 was 1 .000 gallon tank
used to store fuel oil . The tank was
removed on February 21, 1986 . Two soil samples were collected
from
the tank excavation at the time of the removal and were found
to
contain 11 .000 ppm and 13,000 ppm of total extractable
hydrocarbons
(TEH). As a result, 45 cubic yards of soil was excavated from
around
the former tank bottom.
Additional soil sampling was performed at the former tank
location in1995 . Boring sample results indicated elevated concen
trations ofBTEX, and TEH.
B62, UT-70 UT-70 was a 2,500 gallon carbon steel tank used to
store fuel oil foruse in generators . It was installed in early
1960 and its removal date isunknown. The depth of the excavation is
believed to be approximately10 feet below ground surface. No soil
investigation has beenconducted at the former UST location .
CHEMICAL EXPOSURE
The primary entry route of potential chemicals of concern and
hazardous materials is inhalationof vapors or breathable
particulates of the chemicals . Refer to Table 2 ; Chemical
HazardProperties and Exposure Information from the original HSP
dated June 1996 for the chemicalinformation. All required personal
protective equipment (PPE) as specified in the HazardAnalysis of
Field Tasks section of the original HSP dated June 1996 shall be
followed .
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Table 1
SITE CHARACTERIZATION
Area IV LUFT Site , B55 UT-55
ANTICIPATED CHEMICAL(S) & THEIR PHYSICAL STATE : Fuels and
TPH
( Liquid ( ) Sludge ( ) UnknownSolid (x) Gas/Vapors (x) Other:
Pollutants adsorbed to soi l(
Notes : It is anticipated that almost none of the suspected
chemicals at the site will be in the form of freeproduct .
Anticipated chemicals are those either detected during previous
sampling or that will besampled for during the RFI .
MATRIX :
(x) Surface soil s
( ) Soils at depth( ) Surface water ( ) Free product( ) Ground
water ( ) Othe r
POTENTIAL HAZARDOUS PROPERTIES :
( Corrosive (x) Flammable ( ) RadioactiveToxic (x) Volatile ( )
ReactiveInert (x) Carcinogenic ( ) UnknownAsphyxiant ( ) Compressed
gas ( ) Other
(((
CONTAINER/STORAGE SYSTEM INFORMATION :
(x) Tanks () Landfills/Dumps (x) Surface( ) Drums ()
Impoundments () Subsurfac e( ) Pipes () Other ()
Uncontainerized
CONDITION OF CONTA INER/STORAGE SYSTEM(S) :
( ) Sound/Undamaged (x) Confirmed leaks () N/A( )
Deteriorated/Unsound () Suspected leaks () Unknown(x) Remove d
ORIGIN OR INDUSTRIAL APPLICATION OF CHEMICALS OF CONCERN:
( ) Manufacturing ( ) N/A( ) Maintenance/Repair (x) Previous
Use( ) Painting/Coating ( ) Storage( ) Power Generation ( )
Other
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Table 1
SITE CHARACTERIZATION
Area IV LUFT Site, B62 UT-70
ANTICIPATED CHEMICAL(S) & THEIR PHYSICAL STATE : Fuels and
TPH
( ) Liquid ( ) Sludge ( ) Unknown( ) Solid (x) Gas/Vapors (x)
Other: Pollutants adsorbed to soi l
Notes : It is anticipated that almost none of the suspected
chemicals at the site will be in the form of freeproduct .
Anticipated chemicals are those that will be sampled for during the
RFI .
MATRIX :
(x) Surface soils () Surface water ( ) Free product(x) Soils at
depth () Ground water ( ) Other
POTENTIAL HAZARDOUS PROPERTIES :
( ) Corrosive (x) Flammable () Radioactive(x) Toxic (x) Volatile
() Reactive( ) Inert (x) Carcinogenic ( ) Unknown( ) Asphyxiant ( )
Compressed gas ( ) Other
CONTAINER/STORAGE SYSTEM INFORMATION :
(x) Tanks () Landfills/Dumps (x) Surface( ) Drums ()
Impoundments () Subsurfac e( ) Pipes () Other ()
Uncontainerized
CONDITION OF CONTAINER /STORAGE SYSTEM(S) :
( ) Sound/Undamaged ( ) Confirmed leaks ( ) N/A( )
Deteriorated/Unsound (x) Suspected leaks ( ) Unknown(x) Remove
d
ORIGIN OR INDUSTRIAL APPLICATION OF CHEMICALS OF CONCERN :
( ) Manufacturing ( ) N/A( ) Maintenance/Repair (x) Previous
Use( ) Painting/Coating (x) Storage( ) Power Generation ( )
Other
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ADDENDUMHEALTH AND SAFETY PLAN ADDENDUM ACCEPTANCE
I have had the opportunity to read and ask questions about this
HSP. My signature certifies that Iunderstand the procedures ,
equipment , and restrictions of this plan and agree to abide by
them .
Signature* Printed Name Company Date
* This acceptance form is required for all routine site staff
and subcontracting personnel .
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