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

HDMSeOO104232

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) .

313150002 1

HDMSe00104233

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 .

313150002 2

HDMSe00104234

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) .

313150002 3

HDMSe00104235

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.

313150002 4

HDMSe00104236

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 .

313150002 5

HDMSe00104237

JZ AREA IV LOFTBUILDING 55 UST SIT E

Exhaust Stac k

Bldg200

0

F Street

m

dp

m

Fm

m

m

m

0

2 ts S

VO HOCsTPH- ` 5 15 20

5, 10,15,2 y~l S 1 ti UT-55-S1-. . . ~. G. Stet. . .

155

Legend

■ Completed HSA Sample Location■ Proposed GP Sample Location

GP Geoprob eHSA Hollow Stem Auge r

Base Map LegendExisti ng Buildings Ground Elevatio nor Structures Contours

nksS l t T AIC Curbi na ,o ven gR Indicates Removed

Di rt RoadtillLllWlll]

Petroleum Fue l/Oil Tanks ,R Indicates Removed Pond sHydrazine (MMH,UDMH,HZ)

Fence sTanks, R Indicates Remove d

Other Tanks, Pipe sR Indicates Removed

k?xvx~ Awnings

Cree s

RD-5 Rock Outcrop s0 Monito ring Well

0

FEET

50

RocketdyneSANTA SUSANA FIELD LABORATOR Y

FIGUR E

tikrv ;p~nxYl 4oiVfiquryabba r p d 55

PROPOSED PHASE II SOIL SAMPLING LOCATIONSBUILDING 55 UST SITE 1

ATTACHMENT A

RCRA FACILITY INVESTIGATIONWORK PLAN ADDENDUM

HEALTH AND SAFETY PLAN - APPENDIX DADDENDUM, NOVEMBER 1997

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 .

313150002 - HSP Addendum 2 1

HDMSe00104240

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

313150002 - HSP Addendum 2 2

HDMSe00104241

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 .

313150002 - HSP Addendum 2 3

HDMSe00104242

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 .

313150002 - HSP Addendum 2 4

HDMSe00104243

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

313150002 - HSP Addendum 2 5

HDMSe00104244

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

313150002 - HSP Addendum 2 6

HDMSe00104245

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 .

3131 50002 - HSP Addendum 2 7

HDMSe00104246