Soil Investigation Sampling & Analysis Plan, Historical

Lockheed Martin Supplemental Soil Investigation Sampling and Analysis Plan Beaumont Site 1 Historical Operational Areas A, B, and C Beaumont, California

December 2006

Prepared for Lockheed Martin Corporation Corporate Energy, Environmental Safety and Health Burbank, California

Prepared by Tetra Tech, Inc. San Bernardino, California

______Thomas Villeneuve Beaumont Program Manager

______Brenda Meyer Deputy Beaumont Program Manager

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

TABLE OF CONTENTS

Section Page

1.0 INTRODUCTION ...... 1-1

2.0 SITE HISTORY...... 2-1 2.1 Area Description...... 2-1 2.2 Previous Site Investigations ...... 2-1 2.2.1 Previous Investigations for Historical Operational Area A...... 2-4 2.2.2 Previous Investigations for Historical Operational Area B ...... 2-7 2.2.3 Previous Investigations for Historical Operational Area C ...... 2-14

3.0 INVESTIGATION APPROACH...... 3-1 3.1 Introduction...... 3-1 3.2 Feature Specific Investigation Scheme ...... 3-2 3.2.1 Historical Operational Area A (Eastern Aerojet Range) ...... 3-2 3.2.2 Historical Operational Area B (Rocket Motor Project Area) ...... 3-2 3.2.3 Historical Operational Area C (Burn Pit Area) ...... 3-9 3.2.4 Percolation Tests ...... 3-12 3.2.5 Potentially Uncharacterized Features ...... 3-16

3.3 Soil Investigation Program...... 3-16 3.3.1 Soil Boring Investigation...... 3-18 3.3.2 Soil Gas Survey ...... 3-20 3.3.3 Percolation Tests ...... 3-20 3.3.4 Geophysical Survey and Surface Soil Sampling ...... 3-20

4.0 REFERENCES...... 4-1

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE i FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

LIST OF FIGURES Page Figure 1-1 Location Map...... 1-3 Figure 2-1 Historical Operational Areas Map...... 2-2 Figure 2-2 Historical Operational Area A, Eastern Aeroject Range (Avanti) Previous Soil Sample Locations ...... 2-5 Figure 2-3 Historical Operational Area B, Rocket Motor Production Area (Northern Portion) Previous Soil Sample Locations...... 2-8 Figure 2-4 Historical Operational Area B, Rocket Motor Production Area (Southern Portion), Previous Soil Sample Locations...... 2-9 Figure 2-5 Previous Soil Sampling Locations, Historical Operational Area C...... 2-15 Figure 3-1 Historical Operational Area A, Eastern Aerojet Range (Avanti), Planned Soil Boring Location Map ...... 3-5 Figure 3-2 Historical Operational Area B, Rocket Motor Production Area (Southern Portion), Planned Soil Boring Location Map ...... 3-6 Figure 3-3 Historical Operational Area C–Feature 22, Burn Pit Area, Planned Soil Boring and Soil Gas Location Map...... 3-10 Figure 3-4 Historical Operational Area C–Feature 23, Planned Soil Boring Location Map ...... 3-11 Figure 3-5 Historical Operational Area B, Rocket Motor Production Area (Southern Portion), Planned Percolation Test Location Map...... 3-14 Figure 3-6 Historical Operational Area C, Burn Pit Area, Planned Percolation Test Location Map...... 3-15 Figure 3-7 Geophysical Survey Area...... 3-17

LIST OF TABLES

Table 2-1 Summary of Investigation and Remediation Documents Reviewed for Historical Operational Areas A, B, and C...... 2-3 Table 2-2 Summary of Previous Investigations Performed by Tetra Tech within Historical Operational Area A ...... 2-6 Table 2-3 Summary of Previous Investigations Performed by Tetra Tech within Historical Operational Area B ...... 2-10 Table 2-4 Summary of Previous Investigations Performed by Tetra Tech within Historical Operational Area B ...... 2-16 Table 3-1 Summary of Sampling and Analysis Plan for Historical Operational Areas A through C. 3-3 Table 3-2 Summary of Percolation Tests ...... 3-13

APPENDICES Appendix A Supplemental Information - Previous Soil Boring and Monitoring Well Locations and Previous Soil Boring Perchlorate Results

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE ii FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

Acronyms

1,1-DCE 1,1-dichloroethene 1,1,1-TCA 1,1,1-trichloroethane 1,2-DCA 1,2-dichloroethane bgs below ground surface BPA Burn Pit Area ESA Environmental Site Assessment HASP Health and Safety Plan LMC Lockheed Martin Corporation LPC Lockheed Propulsion Company mg/kg milligrams/kilogram (parts per million) mm millimeter µg/kg micrograms per kilogram (parts per billion) µg/L micrograms per liter MTBE methyl tert butyl ether PCB polychlorinated biphenyl PCE tetrachloroethene ppbv parts per billion by volume QAPP quality assurance project plan REC Recognized Environmental Condition RMPA Rocket Motor Production Area SAP Sampling and Analysis Plan SRAM short range attack missile SVOC semivolatile organic compound TCE trichloroethene TPH total petroleum hydrocarbons VEW vapor extraction well VOC volatile organic compound

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE iii FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

SECTION 1 INTRODUCTION

On behalf of Lockheed Martin Corporation (LMC), Tetra Tech, Inc. has prepared the following Sampling and Analysis Plan (SAP) to perform a supplemental subsurface soil investigation in Historical Operational Area A (Eastern Aerojet Range), Area B (Rocket Motor Production Area), and Area C (Burn Pit Area) at LMC’s Beaumont Site 1. In general, Beaumont Site 1 (also known as Potrero Creek) consists of approximately 9,100 acres and is located approximately 70 miles east of Los Angeles in the City of Beaumont, California (Figure 1- 1). Historically, the facility was used primarily for the assembly and testing of rocket motors, and ballistics testing.

This subsurface soil investigation in Historical Operational Areas A, B, and C at Beaumont Site 1 are follow-on activities to site the investigation conducted between September 30 and November 11, 2004 (Tetra Tech, 2005). The proposed investigations will be conducted through a combined soil boring and soil gas sampling and analysis program. This SAP presents an overview of historical chemical usage and previous investigations conducted in Historical Operational Areas A, B, and C as defined in the Site 1 & 2, Phase I Environmental Site Assessment (Tetra Tech, 2003b) and the Soil Investigation Report, Historical Operational Areas A, B, and C (Tetra Tech, 2005). In addition, the SAP provides the proposed soil boring and soil gas sampling locations, sampling intervals, and analytical scheme. The information from this supplemental subsurface soil investigation will serve as a guide to delineate chemically impacted soil in Historical Operational Areas A, B, and C at Beaumont Site 1.

The Lockheed Beaumont Facilities, Preliminary Site Investigation Work Plan, Volume 1 (Tetra Tech, 2003c) presents a brief site history and summary of the technical approach to site investigations. The Work Plan also includes the Quality Assurance Project Plan (QAPP) and Health and Safety Plan (HASP). The content of the Work Plan, QAPP, and HASP remain appropriate for implementation as part of this SAP, unless amended herein.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 1-1 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

This SAP for Historical Operational Areas A, B, and C is organized as follows: • Section 2 - Site History: This section provides a summary of historical operations and chemical usage at Historical Operational Areas A, B, and C and a summary of previous environmental investigations conducted in these areas.

• Section 3 – Sampling Approach: This section provides a description of the planned subsurface soil investigation. The information presented includes a list of each assessment feature, the rationale for assessment, and the proposed soil boring and soil gas/sampling locations, sampling intervals, and analytical scheme.

• Section 4 – References: This section lists all documents referenced for this SAP.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 1-2 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

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H i s t o r i c a l O p e r a t i o n a l A r e a s A , B a n d C

SECTION 2 SITE HISTORY

2.1 AREA DESCRIPTION

Historical Operational Areas A, B, and C occupy the northeastern and eastern portion of Beaumont Site 1 (Figure 2-1). A brief description of each Area is presented below:

• Historical Operational Area A: Also known as the Eastern Aerojet Range (Avanti), Area A was primarily used by the Aerojet Corporation for research and development experimentation on several types of ammunition for long-range 30 millimeter (mm) weapons. Other unknown classified activities, such as the Avanti project, were conducted in this area.

• Historical Operational Area B: Also known as the Rocket Motor Production Area (RMPA), Area B was used for the processing and mixing of solid rocket motor propellant.

• Historical Operational Area C: Also known as the Burn Pit Area (BPA), Area C was used for the burning/burial of hazardous materials (solid rocket propellant), storage of chemicals, and testing of beryllium research motors.

2.2 PREVIOUS SITE INVESTIGATIONS

A total of 25 historical features have been identified as potential recognized environmental concerns (RECs) within Historical Operational Areas A, B, and C. Various soil investigations, soil gas surveys, and remediation activities have been performed in Historical Operational Areas A, B, and C of Beaumont Site 1 since 1986. Various reports were reviewed to identify areas of known or suspected chemical usage and/or storage. A summary of each document reviewed is presented in Table 2-1.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 2-1 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

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S u p p l e m e n t a l S o i l I n v e s t i g a t i o n , S a m p l i n g a n d A n a l y s i s P l a n f o r

H i s t o r i c a l O p e r a t i o n a l A r e a s A , B a n d C

Table 2-1 Summary of Investigation and Remediation Documents Reviewed for Historical Operational Areas A, B, and C

Document Title, Author and Date Report Findings Hydrogeologic Study Report, This investigation details the findings of additional site characterization work in order to Lockheed Propulsion Company, provide a better definition of the vertical and lateral extent of contamination in the soil Beaumont Test Facilities, Radian vapor and groundwater and to gain a better understanding of the physical characteristics of Corporation, December 1986 the aquifer. During the investigation, soil vapor, soil, and groundwater samples were collected from areas near or adjacent to the burn pit area. Soil vapor analytical results showed that volatile organic compound (VOC) concentrations range from 50 to approximately 6,400 parts per billion by volume (ppbv) in shallow soils and generally increased with depth within the burn pit area. Soil samples collected during the investigation reported low concentrations of 1,2-dichloroethane (1,2-DCA); 1,1,1- trichloroethane (1,1,1-TCA); and trichloroethene (TCE). Although low concentrations of VOCs were detected in the soil samples collected, the high soil vapor concentrations suggest that some residual concentrations reside in the vadose zone soils. The total VOCs concentration ranged from 2.2 to 12,000 micrograms per liter (µg/L) in groundwater. Final Source and Hydrologeologic The source investigation involved removal of the low-level radioactive burial area and Investigation, Lockheed Propulsion locating and sampling suspect areas within the previously identified sanitary landfill, burn Company, Beaumont Test pit areas, and rocket motor production area to identify waste materials and contaminant Facilities, Radian Corporation, sources. Waste, soil, soil gas, and groundwater samples were collected and analyzed for February 1990 VOCs, semi-volatile organic compounds (SVOCs), and metals during the investigation. The majority of the VOC and SVOC analytical results for soil and soil gas reported in the investigation were mostly assumed to have been due to laboratory contamination. However, validated reports of 1,1,1-TCA; 1,1-dichloroethene (1,1-DCE); TCE; tetrachloroethene (PCE) were detected at low concentrations in both soil and soil gas. Iron was also detected at low concentrations in soil. Burn Pit Area Removal Action This report documents the remediation activities performed at the burn pit area of the former Report, Lockheed Propulsion Lockheed Propulsion Company Beaumont Site No. 1. The scope of work for this Company, Beaumont Test investigation included: 1) removing all burn pit wastes and 2) collecting confirmation soil Facilities, Radian Corporation, samples to ensure that no burn pit or possible contaminated material remain. A total of nine June 1993 burn pit areas were excavated and all debris removed and stockpiled. A total of 10 confirmation soil samples were collected from beneath the debris to ensure that no impacted soil or debris remained. Based on the analytical results, all underlying soils were considered to be clean. Approximately 48,600 cubic yards of topsoil and overburden soils were removed and replaced. Approximately 4,112 tons of non-hazardous material was excavated from the burn pits. Approximately 18.6 tons of specific wastes (e.g. a drum containing an oily substance, large chunks of unburned rocket propellant, and a blue burn rate modifier) were excavated from the burn pits and shipped off-site for disposal. June 1996 Vapor Sampling Report, Soil vapor samples were collected from 12 soil vapor wells and 3 air stripper locations and Lockheed Beaumont No. 1, Radian analyzed for volatile organic compounds using an on-site mobile laboratory. The results of International LLC, October 10, the samples collected and analyzed in this round were compared to previous sampling 1996 results which indicated that the soil vapor concentrations are slowly diminishing over time. August 1997 Vapor Sampling Soil vapor samples were collected from 16 soil vapor wells and 3 air stripper locations and Report, Lockheed Beaumont No. 1, analyzed for VOCs using an on-site mobile laboratory. After comparing results to previous Revised, Radian International LLC, sampling episodes, the soil vapor concentrations appear to be slowly diminishing over time. August 17, 1997 The same contaminants continue to be present with no new contaminants observed during this sampling round.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 2-3 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

Table 2-1 (continued) Summary of Investigation and Remediation Documents Reviewed for Historical Operational Areas A, B, and C

Document Title, Author and Date Report Findings Supplemental Site Characterization A total of 40 soil and soil gas samples were collected and analyzed from 20 locations (10 Report, Beaumont Site 1, Lockheed within the RMPA and 10 within the BPA) at depths of 5 and 15 feet below ground surface Martin Corporation, Tetra Tech, (bgs). Soil gas samples collected from within the BPA contained detectable concentrations Inc., September 2002 of 1,1-DCE, 1,1-DCA, 1,1,1-TCA, and TCE. All detected VOCs in soil gas were within 250 feet of vapor extraction well VEW-11, which correlates to the areas of highest VOC- affected groundwater. Soil gas samples collected from the RMPA reported detectable concentrations of TCE, 1,1-DCE, and fuel components. The chlorinated solvents were detected near the former motor casing washout area. The fuel components were detected near the northern portion of the RMPA. Concentrations of perchlorate were present in 3 out of 10 soil samples collected at the BPA and 8 out of 10 soil samples from the RMPA. The maximum concentration of perchlorate in soil was 1,260 micrograms per kilogram (µg/kg). Lockheed Beaumont, Site 1 & 2, The Phase I ESA summarized available documentation regarding historical and current Phase 1 Environmental Site potential RECs that may have resulted from past and/or current property usage. The ESA Assessment, Lockheed Martin reported: storage, handling, and disposal practices of chemicals and hazardous materials; Corporation, Beaumont, California, historical process lines, storage vessels, underground storage tanks and other features that Tetra Tech, March 2003 may have served as discharge points for chemicals; and the historical use and operations that may have environmentally affected the properties during the past 50 years. Fifty-four (54) historical or potential RECs were identified at Beaumont Site 1. Soil Investigation Report, A total of 293 samples were collected and analyzed from 64 borings at depths ranging from Historical Operational Areas A, B, 0.5 to 60 feet bgs. Soil samples were analyzed for one or more of the following and C, Beaumont Site 1, Lockheed constituents: VOCs, SVOCs, 1,4-dioxane, perchlorate, Title 22 metals, polychlorinated Martin Corporation, Tetra Tech, biphenyls (PCBs), total petroleum hydrocarbons (TPH) , and explosive residues. PCBs, 1,4- Inc., August 2005 dioxane, and explosive residues were not detected at concentrations above their respective reporting limits. VOCs were detected at concentrations ranging from 0.93 to 700 µg/kg. SVOCs were detected at concentrations ranging from 0.59 to 4.5 milligrams per kilogram (mg/kg). Perchlorate was detected at concentrations ranging from 23.6 to 171,000 µg/kg. Metals were detected with arsenic detected at concentrations up to 60.8 mg/kg. In addition, soil gas concentrations above reporting limits were detected for TCE, PCE, 1,1-DCE, Freon- 113, and 1,1,1-TCA.

2.2.1 Previous Investigations for Historical Operational Area A

A total of seven historical features (Figure 2-2) were identified as potential RECs within Historical Operational Area A during the Phase I ESA performed by Tetra Tech (Tetra Tech, 2003b). A brief summary of investigations performed by Tetra Tech at these features is presented in Table 2-2.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 2-4 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

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S u p p l e m e n t a l S o i l I n v e s t i g a t i o n , S a m p l i n g a n d A n a l y s i s P l a n f o r

H i s t o r i c a l O p e r a t i o n a l A r e a s A , B a n d C

Table 2-2 Summary of Previous Investigations Performed by Tetra Tech within Historical Operational Area A

Feature Feature Source Investigation Summary No. Description 1 Avanti The revetments were utilized for storage of explosive materials and motors. Chemicals Storage stored and/or used at this feature are unknown. Revetments Tetra Tech, Two soil borings were drilled and sampled to 10 feet bgs at this feature. Soil samples 2005 were analyzed for VOCs, SVOCs, perchlorate, Title 22 metals, PCBs, TPH, 1,4- dioxane, and explosive residue. Perchlorate, PCBs, TPH, 1,4-dioxane, and explosive residues were not detected at concentrations above their respective reporting limits. VOCs (i.e., acetone, ethylbenzene, n-propylbenzene, and toluene) were detected at concentrations ranging from 0.95 to 34 µg/kg and are compounds associated with laboratory cross-contamination. One SVOC (bis[2-ethylhexyl]phthalate) was detected at a concentration of 0.59 mg/kg. Metals were detected with arsenic detected at concentrations up to 38.6 mg/kg. No further investigations are proposed for this feature. 2 Test Firing The test firing area was utilized for research and development of experimentation on several types of rounds for long-range 30-mm weapons and possibly explosives. Area Tetra Tech, One soil boring was drilled and sampled to 10 feet bgs at this feature. Soil samples 2005 were analyzed for Title 22 metals and explosive residue. Explosive residues were not detected at concentrations above reporting limits. Metals were detected with arsenic detected at concentrations up to 2.38 mg/kg. No further investigations are proposed for this feature. 3 Unknown The structure consists of a concrete pad with hinged I-beams and gravel pad. The Structure historical activities at this structure are unknown. Chemicals stored and/or used at this feature are unknown. Tetra Tech, Two soil borings were drilled and sampled to 10 feet bgs at this feature. Soil samples 2005 were analyzed for VOCs, SVOCs, 1,4-dioxane, and Title 22 metals. SVOCs and 1,4- dioxane were not detected at concentrations above their respective reporting limits. VOCs (i.e., 1,1-DCE, acetone, and toluene) were detected in samples at concentrations ranging from 1.0 to 38 µg/kg. Detected concentrations of acetone and toluene are associated with laboratory cross-contamination. Metals were detected with arsenic detected at concentrations up to 60.8 mg/kg. No further investigations are proposed for this feature. 4 Storage The revetments were utilized for storage of explosive materials. Chemicals stored Revetments and/or used at this feature are unknown. Tetra Tech, Two soil borings were drilled and sampled to 10 feet bgs at this feature. Soil samples 2005 were analyzed for VOCs, PCBs, Title 22 metals, TPH, 1,4-dioxane, and explosive residues. VOCs, PCBs, TPH, 1,4-dioxane, and explosive residues were not detected at concentrations above their respective reporting limits. Metals were detected with arsenic detected at concentrations up to 26.8 mg/kg. No further investigations are proposed for this feature. 5 Gate House The area consisted of an entrance gate with supporting guardhouse. An electric gate Area may have been used at this feature. PCBs in mineral oil and fuels may have been used at this feature. Tetra Tech, One soil boring was drilled and sampled to 5 feet bgs at this feature. Soil samples were 2005 analyzed for VOCs, PCBs, TPH, and 1,4-dioxane. VOCs, PCBs, TPH, and 1,4-dioxane were not detected at concentrations above their respective reporting limits. No further investigations are proposed for this feature. 6 Old Rocket This area consisted of what appeared to be an old rocket motor casing. Upon further Motor inspection it was determined to be a tank. The interior wall of the tank was coated with Casing a tar-like substance. The former content and use of the tank are unknown. Due to a technical oversight, samples were collected one-third of a mile south of this feature.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 2-6 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

Table 2-2 (continued) Summary of Previous Investigations Performed by Tetra Tech within Historical Operational Area A

Feature Feature Source Investigation Summary No. Description 6 Old Rocket Tetra Tech, One soil boring was drilled and sampled to 5 feet bgs at one-third of a mile south of (Cont.) Motor 2005 this feature. Soil samples were analyzed for VOCs, SVOCs, perchlorate, Title 22 Casing metals, and 1,4-dioxane. SVOCs, perchlorate, and 1,4-dioxane were not detected at concentrations above their respective reporting limits. VOCs (i.e., acetone and benzene) were detected at concentrations ranging from 1.3 to 26 µg/kg and are from compounds associated with laboratory cross-contamination. Metals were detected with arsenic detected at concentrations up to 2.27 mg/kg. No further investigations are proposed for the location sampled. However, the previously identified feature location will be further investigated for soil contamination. 7 55-Gallon This empty, rusted, 55-gallon drum was found approximately 200 feet east of Feature Drum No. 1. The former content and use of the drum are unknown. Tetra Tech, One soil boring was drilled and sampled to 5 feet bgs at this feature. Soil samples were 2005 analyzed for VOCs, SVOCs, perchlorate, PCBs, Title 22 metals, and 1,4-dioxane. Perchlorate, PCBs, 1,4-dioxane, and SVOCs were not detected at concentrations above their respective reporting limits. VOCs (i.e., ethylbenzene, n-propylbenzene, and toluene) were detected at concentrations ranging from 1.3 to 4.7 µg/kg. Detected concentrations of acetone and toluene are associated with laboratory cross- contamination. Metals were detected with arsenic detected at concentrations up to 28.5 mg/kg. No further investigations are proposed for this feature. Historical Operational Tetra Tech, A human health and ecological risk assessment will be performed for Historical Area A – Area Wide 2005 Operational Area A. As part of the risk assessment, a background assessment will be Investigation performed to evaluate naturally occurring metals (e.g., arsenic) at Historical Operational Area A.

2.2.2 Previous Investigations for Historical Operational Area B

A total of 14 historical features were identified as potential RECs within Historical Operational Area B during the Phase I ESA (Figure 2-3 and 2-4) performed by Tetra Tech (Tetra Tech, 2003b). A brief summary of the investigations performed by Tetra Tech at Historical Operational Area B features is presented in Table 2-3.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 2-7 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

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R o c k e t M o t o r P r o d u c t i o n A r e a

( N

o r t h e r n P o r t i o n )

P r e v i o u s S o i l S a m p l e L o c a t i o n s

T e t r a T e c h , I n c . D e c e m b e r 2 0 0 6

L o c k h e e d M a r t i n B e a u m o n t S i t e 1

S u p p l e m e n t a l S o i l I n v e s t i g a t i o n , S a m p l i n g a n d A n a l y s i s P l a n f o r

H i s t o r i c a l O p e r a t i o n a l A r e a s A , B a n d C

7 9

\ L

O }

D e t a i l

a p A r e a

0 1 0 0 2 0 0 3 0 0 F e e t

B e a u m o n t S i t e 1

A d a p t e d f r o m :

2 0 0 3 a e r i a l p h o t o g r a p h .

C h e m c a l S t o r a g e

Q u o n s e t H u t

( B u l d n g 3 1 9 )

i i

F u e l S l u r r y S t a t o n ( F e a t u r e # 1 2 )

( B u l d n g 3 1 7 )

i i

( F e a t u r e # 1 1 )

P a r t a l l y B u r e d D r u m

i i

( F e a t u r e # 2 1 )

C o n c r e t e P a d

t h D r y W e l l

w i

L E G E N D

( F e a t u r e # 1 4 )

r e v i o u s S o i l S a m p l e L o c a t i o n

( B u l d n g 3 1 5 )

i i

r e v i o u s S o i l B o r i n g a n d

P r o p e l l a n t n g S t a t o n

i x i i

S o i l G a s S a m p l e L o c a t i o n

( F e a t u r e # 1 0 )

( 3 1 5 A ) E l e c t r c a l E n c l o s u r e

i s t o r i c S i t e o r A s s e s s m e n t

B l u e o t o r

( F e a t u r e # 1 5 )

i n d i n g L o c a t i o n

B u r n P t

( F e a t u r e # 8 )

C o n c r e t e U t l t y P a d

i i

( F e a t u r e # 2 0 )

C o n c r e t e P a d o n B e r m

( F e a t u r e # 1 9 )

o t o r W a s h o u t A r e a

( F e a t u r e # 9 )

B e a u m o n t S i t e 1

F i g u r e 2 4

( B u l d n g 3 1 6 ) C a s t

i i

H i s t o r i c a l O p e r a t i o n a l A r e a B

a n d C u r e S t a t o n

E l e c t r c a l E n c l o s u r e ( 6 0 )

R o c k e t M o t o r P r o d u c t i o n A r e a

( F e a t u r e # 1 8 )

F e a t u r e # 1 6 )

( S

o u t h e r n P o r t i o n )

S S

P r e v i o u s o i l a m p l e L o c a t i o n s

T e t r a T e c h , I n c . D e c e m b e r 2 0 0 6

L o c k h e e d M a r t i n B e a u m o n t S i t e 1

S u p p l e m e n t a l S o i l I n v e s t i g a t i o n , S a m p l i n g a n d A n a l y s i s P l a n f o r

H i s t o r i c a l O p e r a t i o n a l A r e a s A , B a n d C

Table 2-3 Summary of Previous Investigations Performed by Tetra Tech within Historical Operational Area B

Feature Feature Source Investigation Summary No. Description 8 Blue Motor Four short-range attack missile (SRAM) motors with Maloy Blue propellant Burn Pit were reported to have been burned and disposed of at this location. Solvents, ammonium perchlorate, ferrocene, and diesel fuels were reported to have been used at the feature. Tetra Tech, Two soil borings were drilled and sampled to 20 feet bgs. Soil samples were 2005 analyzed for VOCs, SVOCs, perchlorate, Title 22 metals, PCBs, TPH, and 1,4-dioxane. SVOCs, perchlorate and 1,4-dioxane were not detected at concentrations above their respective reporting limits. TPH was detected at a concentration of 6.8 mg/kg. VOC (i.e., acetone and ethanol) concentrations ranged from 23 to 700 µg/kg. Detected concentrations of acetone are associated with laboratory cross-contamination. Metals were detected at low concentrations. A limited soil gas survey for VOCs and fuel hydrocarbons was also performed. No VOCs or fuel hydrocarbons were detected in soil gas. No further investigations are proposed for this feature. 9 Motor Washout Defective solid rocket propellant was washed out of the motor casings with a Area high-pressure water jet in this area. The water slurry produced from the washout activities was collected in a lined catch basin and later brought to the burn pit landfill for incineration. Additionally, a flamethrower was applied to the ground surface of the washout area to burn off any residual propellant. Solvents, ammonium perchlorate, ferrocene, and diesel fuels were reported to have been used at the feature. Tetra Tech, Two soil borings and soil gas locations were drilled to approximately 15 feet 2002 bgs in the vicinity of the motor washout area. Samples were analyzed for VOCs, 1,4-dioxane, and perchlorate. Perchlorate was reported with a maximum concentration of 178 µg/kg in soil. VOCs and 1,4-dioxane were not detected at concentrations above their respective reporting limits. VOCs were not detected above their reporting limits in soil gas. Tetra Tech, Nine soil borings were drilled and sampled to 40 feet bgs at this feature. 2005 The soil samples were analyzed for VOCs, SVOCs, perchlorate, Title 22 metals, TPH and 1,4-dioxane. SVOCs, TPH and 1,4-dioxane were not detected at concentrations above their respective reporting limits. VOCs (i.e., acetone, chloroform, methylene chloride, and TCE) were detected at concentrations ranging from 1.2 to 64 µg/kg. Detected concentrations of acetone and methylene chloride are associated with laboratory cross- contamination. Perchlorate was detected at concentrations ranging from 26.7 to 1,250 µg/kg. Metals were detected with arsenic detected at concentrations up to 9.98 mg/kg. TCE and 1,1-DCE were detected in soil gas at concentrations up to 1.2 µg/L and 0.9 µg/L, respectively. Further investigations are proposed to provide additional soil contamination delineation. 10 Propellant This feature consisted of a 300-gallon mixer. At the mix station, dry Mixing Station oxidizer, primarily ammonium perchlorate, was blended in the mixer with (Bldg 315) liquid ingredients consisting of butadiene derivatives and a burn rate modifier (primarily ferrocene). Solvents, ammonium perchlorate, ferrocene, and other fuels were reported to have been used at the feature. Tetra Tech, Two soil and soil gas borings were drilled to approximately 15 feet bgs in 2002 the vicinity of the former propellant mixing station. Samples were collected and analyzed for VOCs, perchlorate, and 1,4-dioxane. Perchlorate was detected to a maximum concentration of 1,260 µg/kg. VOCs and 1,4- dioxane were not detected at concentrations above their respective reporting limits. VOCs were not detected above their reporting limits in soil gas.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 2-10 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

Table 2-3 (continued) Summary of Previous Investigations Performed by Tetra Tech within Historical Operational Area B Feature Feature Source Investigation Summary No. Description 10 Propellant Tetra Tech, Four soil borings were drilled and sampled to 40 feet bgs at this feature. The (Cont.) Mixing Station 2005 soil samples were analyzed for VOCs, SVOCs, perchlorate, Title 22 metals, (Bldg 315) TPH, and 1,4-dioxane. 1,4-dioxane was not detected at concentrations above the reporting limit. Low levels of TPH, perchlorate, Title 22 metals, SVOCs and VOCs (i.e., acetone and toluene) were detected in samples from this feature. The TPH concentrations ranged from 27 to 620 mg/kg. Perchlorate concentrations ranged from 29 to 4,610 µg/kg. VOC concentrations were 1.1 and 26 µg/kg. Detected concentrations of acetone and toluene are associated with laboratory cross-contamination. Detected concentrations of SVOCs (polyaromatic hydrocarbons, phthalates, and phenols) ranged from 0.66 to 4.5 mg/kg. Metals were detected with arsenic detected at concentrations up to 18.1 mg/kg. Further investigations are proposed to provide additional soil contamination delineation. 11 Fuel Slurry The Fuel Slurry Station was used primarily to weigh and premix liquid fuel Station (Bldg prior to propellant mixing activities. Perchlorate and solvents (primarily 317) butadiene) were used at this feature. Tetra Tech, Two soil and soil gas borings were drilled and sampled to approximately 15 2002 feet bgs in the vicinity of the fuel slurry station. Samples were analyzed for VOCs, perchlorate and 1,4-dioxane. 1,4-dioxane was not detected at concentrations above its reporting limit in soil. Perchlorate was reported with a maximum concentration of 88.4 µg/kg in soil. VOCs were reported above their reporting limits. Methyl-tert butyl ether (MTBE) was reported at a maximum concentration of 1.5 µg/L in soil gas. Tetra Tech, Four soil borings were drilled and sampled to 40 feet bgs at this location. 2005 Soil samples were analyzed for VOCs, SVOCs, and perchlorate. A limited soil gas survey was performed for VOCs. VOCs (i.e., 1,1-dichloroethane, acetone, benzene, toluene, and trichloroethane) were detected at concentrations ranging 0.93 to 50 µg/kg. Detected concentrations of acetone, benzene, and toluene are associated with laboratory cross- contamination. Perchlorate was detected at concentrations ranging from 29.2 to 328 µg/kg. TCE and 1,1-DCE were detected in the soil gas. Further investigations are proposed to provide additional soil contamination delineation. 12 Chemical This 40- by 80-foot storage building was possibly used to store perchlorate, Storage Quonset solvents, ferrocene, and other chemicals. Hut Tetra Tech, Two soil and soil gas borings were drilled and sampled to approximately 15 2002 feet bgs in the vicinity of the chemical storage Quonset hut. The samples were analyzed for VOCs, perchlorate, and 1,4-dioxane. VOCs, perchlorate, and 1,4-dioxane were not detected at concentrations above their respective reporting limits in soil. Benzene, toluene and xylenes were detected in the soil gas samples at concentrations of 0.5 µg/L, 0.8 µg/L and 1.5 µg/L, respectively. Tetra Tech, Two soil borings were drilled and sampled to 20 feet bgs at this location. 2005 Soil samples were analyzed for VOCs, SVOCs, perchlorate, 1,4-dioxane, Title 22 metals, PCBs, and TPH. VOCs, SVOCs, 1,4, dioxane, TPH, and PCBs were not detected at concentrations above their respective reporting limit. Perchlorate concentrations were detected at concentrations ranging from 23.6 to 95.8 µg/kg. Metals were detected with arsenic detected at concentrations up to 9.51 mg/kg. A limited soil gas survey was performed for this feature. TCE was detected in the soil gas at 20 feet bgs. No further investigations are proposed for this feature.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 2-11 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

Table 2-3 (continued) Summary of Previous Investigations Performed by Tetra Tech within Historical Operational Area B Feature Feature Source Investigation Summary No. Description 13 Vault - Proposed This concrete vault structure was possibly used for utilities or an electrical transformer. PCBs may have been used at this feature. Tetra Tech, One soil boring was drilled and sampled to 5 feet bgs at this location. 2005 Samples collected were analyzed for PCBs and VOCs. PCBs were not detected at this feature. One VOC (i.e., acetone) was detected at a concentration of 35 µg/kg. The detected concentration of acetone is associated with laboratory cross-contamination. No further investigations are proposed for this feature. 14 Pad with Dry This feature consists of a concrete pad with an adjacent dry well. Historical Well use of the pad and dry well is unknown. Tetra Tech, Two soil borings were drilled and sampled to 5 feet (dry well) and 10 feet 2005 bgs at this location. Samples collected were analyzed for VOCs, SVOCs, perchlorate, Title 22 metals, PCBs and TPH. SVOCs, PCBs, 1,4-dioxane, and TPH were not detected at concentrations above their respective reporting limits. Perchlorate was detected at concentrations ranging from 312 to 20,400 µg/kg. One VOC (i.e., acetone) was detected at a concentration of 62 µg/kg. Metals were detected with arsenic detected at concentrations up to 3.39 mg/kg. A soil gas survey was also performed for this feature. VOCs were not detected in the soil gas. Further investigations are proposed to provide additional soil contamination delineation. 15 Electrical This structure possibly housed an electrical transformer. PCBs may have Enclosure – been used at this feature. Bldg 315A Tetra Tech, One soil boring was drilled and sampled to 5 feet bgs at this location. 2005 Samples were analyzed for PCBs and VOCs. PCBs were not detected at concentrations above the reporting limits. VOCS (i.e., acetone and benzene) were detected at concentrations ranging from 1.6 to 130 µg/kg. The detected concentrations of acetone and benzene are associated with laboratory cross- contamination. No further investigations are proposed for this feature. 16 Electrical This structure possibly housed an electrical transformer. PCBs may have Enclosure – been used at this feature. South of Motor Tetra Tech, One soil boring was drilled and sampled to 5 feet bgs at this location. Washout Area 2005 Samples were analyzed for PCBs and VOCs. PCBs were not detected at concentrations above the reporting limits. One VOC (i.e., acetone) was detected at a concentration of 32 µg/kg. The detected concentration of acetone is associated with laboratory cross-contamination. No further investigations are proposed for this feature. 17 Electrical This structure possibly housed an electrical transformer. PCBs may have Enclosure/Sub- been used at this feature. Station Main Tetra Tech, One soil boring was drilled and sampled to 5 feet bgs at this location. Service 2005 Samples collected were analyzed for PCBs and VOCs. PCBs and VOCs were not detected above their respective reporting limits. No further investigations are proposed for this feature. 18 Cast and Cure After the propellant mixing process, the mix was brought to the Cast and Station Cure Station for casting and curing by heating the propellant cast to 140˚ F for several days. Perchlorate and possibly solvents (primarily butadiene) were used at this feature. Tetra Tech, Two soil and soil gas borings were drilled and sampled to approximately 15 2002 feet bgs in the vicinity of the fuel slurry station. The samples were analyzed for VOCs, perchlorate and 1,4-dioxane. VOCs and 1,4-dioxane were not detected at concentrations above their respective reporting limits. Perchlorate was detected with a maximum concentration of 47.1 µg/kg. VOCs were not detected above their reporting limits in soil gas.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 2-12 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

Table 2-3 (continued) Summary of Previous Investigations Performed by Tetra Tech within Historical Operational Area B Feature Feature Source Investigation Summary No. Description 18 Cast and Cure Tetra Tech, Two soil borings were drilled and sampled to 20 feet bgs at this location. (Cont.) Station 2005 Samples collected were analyzed for VOCs, 1,4-dioxane, SVOCs, perchlorate, and Title 22 metals. VOCs, 1,4-dioxane, and SVOCs were not detected at concentrations above their respective reporting limits. Perchlorate concentrations in soil samples ranged from 62.3 to 9,976 µg/kg. One VOC (i.e., acetone) was detected at a concentration of 62 µg/kg. The detected concentration of acetone is associated with laboratory cross- contamination. Metals were detected with arsenic detected at concentrations up to 2.99 mg/kg. A limited soil gas survey was also performed for this feature. TCE was detected in the soil gas at 20 feet bgs. Further investigations are proposed to provide additional soil contamination delineation. 19 Pad on Berm This feature appears to have been used as a test stand. Chemicals stored and/or used at this feature are unknown. Tetra Tech, One soil boring was drilled and sampled to 5 feet bgs at this location. 2005 Samples were analyzed for VOCs, SVOCs, perchlorate, 1,4-dioxane, Title 22 metals, and PCBs. VOCs, SVOCs, PCBs, and 1,4-dioxane were not detected at concentrations above their respective reporting limits. Perchlorate concentrations ranged from 85.3 to 90.6 µg/kg. Metals were detected with arsenic detected at concentrations up to 7.48 mg/kg. Further investigations are proposed to provide additional soil contamination delineation. 20 Pad South of This concrete pad appears to have been used as a utility pad. Mix Station Tetra Tech, One soil boring was drilled and sampled to 5 feet bgs at this location. Bunker – Bldg 2005 Samples were analyzed for VOCs, SVOCs, perchlorate, 1,4-dioxane, Title 315A 22 metals, and PCBs. SVOCs, perchlorate, 1,4-dioxane, and PCBs were not detected at concentrations above their respective reporting limits. Perchlorate concentrations ranged from 310 to 402 µg/kg. One VOC (i.e., acetone) was detected at a concentration of 49 µg/kg. The detected concentration of acetone is associated with laboratory cross-contamination. Metals were detected at low concentrations. Further investigations are proposed to provide additional soil contamination delineation. 21 55-Gallon Drum This empty, rusted, 55-gallon drum is partially buried. The former content and use of the drum is unknown. PCBs and other chemicals may have been used at this feature. Tetra Tech, One soil boring was drilled and sampled to 5 feet bgs at this location. 2005 Samples collected were analyzed for VOCs, SVOCs, perchlorate, 1,4- dioxane, Title 22 metals, and PCBs. SVOCs, perchlorate, 1,4-dioxane, and PCBs were not detected at concentrations above their respective reporting limits. One VOC (i.e., acetone) was detected at concentrations ranging from 28 to 49 µg/kg. The detected concentration of acetone is associated with laboratory cross-contamination. Metals were detected with arsenic detected at concentrations up to 1.72 mg/kg. No further investigations are proposed for this feature. Historical Operational Area Tetra Tech, A human health and ecological risk assessment will be performed for B – Area Wide 2005 Historical Operational Area B. As part of the risk assessment, a background Investigation assessment will be performed to evaluate naturally occurring metals (e.g., arsenic) at Historical Operational Area B.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 2-13 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

2.2.3 Previous Investigations for Historical Operational Area C

A total of four (4) historical features were identified as potential RECs within Historical Operational Area C during the Phase I ESA (Figure 2-5) performed by Tetra Tech (Tetra Tech, 2003b). Two historical features, Burn Pit Landfill (Feature No. 22) and Beryllium Motor Test Stand (Feature No. 24) were previously investigated. A brief summary of the previous investigations performed at these features is presented in Table 2-4.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 2-14 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

7 9

\ L

O }

D e t a i l

0 1 0 0 2 0 0 3 0 0 4 0 0 F

a p A r e a

e e t

B e a u m o n t S i t e 1

A d a p t e d f r o m :

2 0 0 3 a e r i a l p h o t o g r a p h .

B u r n P i t A r e a

L E G E N D

( F

e a t u r e # 2 2 )

r e v i o u s S o i l B o r i n g L o c a t i o n

r e v i o u s S o i l B o r i n g a n d

S o i l G a s S a m p l e L o c a t i o n

i s t o r i c a l O p e r a t i o n a l

A r e a B o u n d a r y

B u r n P i t M a g a z i n e

( F

e a t u r e # 2 5 )

T e m p o r a r y W a s t e

t o r a g e A r e a

( F

e a t u r e # 2 3 )

B e r y l l i u m M o t o r

B e a u m o n t S i t e 1

T e s t t a n d

( F

e a t u r e # 2 4 )

F i g u r e 2 5

H i s t o r i c a l O p e r a t i o n a l A r e a C

B u r n P i t A r e a

P r e v i o u s S o i l S a m p l e L o c a t i o n s

T e t r a T e c h , I n c . D e c e m b e r 2 0 0 6

L o c k h e e d M a r t i n B e a u m o n t S i t e 1

S u p p l e m e n t a l S o i l I n v e s t i g a t i o n , S a m p l i n g a n d A n a l y s i s P l a n f o r

H i s t o r i c a l O p e r a t i o n a l A r e a s A , B a n d C

Table 2-4 Summary of Previous Investigations within Historical Operational Area C Feature Feature Source Investigation Summary No. Description 22 Burn Pit Waste material from both Beaumont Sites was placed in trenches, incinerated, and Landfill buried in the burn pit landfill area. Materials burned in the trenches included: ammonium perchlorate, diesel fuel, wet propellant, dry propellant, out-of- specification propellant, adhesives, resin, metal drums, plastic bags, paper, and solvents. Burn pits were approximately 6 to 8 feet wide by 50 to 100 feet long and 4 to 6 feet deep. A total of 20 to 40 burn pits were previously reported to be within the burn pit landfill area. Radian, In 1990, a total of eight (8) shallow exploratory trenches approximately 3 feet wide 1990 and 5 to 6 feet deep were excavated to determine the lateral extent of the burn pit area. Samples were collected from the waste material excavated from the trenches and analyzed for VOCs, SVOCs, metals and nitrates. VOCs, SVOCs and metals were detected above their respective reporting limits from the waste material samples. Four composite soil samples were collected from beneath the burn material layer and analyzed for VOCs, SVOCs, metals and nitrates. Due to quality control issues (i.e., sample handling, blank contamination) with the samples, the VOC and SVOC analytical results were deemed to be invalid. In addition to the trenching activities, five soil borings were drilled within the burn pit trenches and samples were collected from beneath the burn waste. The samples were analyzed for VOCs. Only 1,1,1- TCA was detected above the reporting limit at a concentration of 35 µg/kg. Radian, Soil gas probes were drilled and installed within the Burn Pit Area at depths ranging 1992 from 4 inches to 78 feet bgs. Analytical results from the surface probes (4 inches bgs) reported low total VOC concentrations ranging from 1 to 23 parts per billion (ppb). The results from the shallow probes (3.5 to 7 feet bgs) reported total VOC concentrations ranging from 50 to approximately 6,400 ppb. The analytical results from the deeper probes reported a maximum total soil gas VOC concentration of 1,000,000 ppbv. Radian, In 1992, Radian Corporation performed a burn pit remedial action program within the 1992 burn pit landfill. During the removal activities, a total of nine (9) trenches were identified and 21 former burn pits were excavated. Approximately 18.6 tons of specific wastes (i.e., drums, unburned rocket propellant, and blue burn rate modifier) were excavated from the trenches. Overall, 48,600 cubic yards of soil was removed and later backfilled into the excavation trenches. Confirmation soil samples were collected from below the excavated materials and analyzed for Title 22 metals, VOCs, and SVOCs. Analytical results from the confirmation soil samples detected metal concentrations below their respective total threshold limit concentrations and below ten times soluble threshold limit concentrations. Additionally, no VOCs or SVOCs were reported above their respective method detection limits. None of the confirmation soil samples were analyzed for perchlorate and 1,4-dioxane. Tetra A total of 10 soil and soil gas borings were drilled to an approximate depth of 15 feet Tech, bgs within the burn pit area. A total of 10 soil and soil gas samples were collected and 2002 analyzed for VOCs, 1,4-dioxane, and perchlorate. Perchlorate was reported at a maximum concentration of 259 µg/kg in soil. Neither VOCs nor 1,4-dioxane was reported above their respective reporting limits in soil. The maximum concentration of VOCs (1,1-dichloroethane) was 152 µg/L in soil gas.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 2-16 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

Table 2-4 (continued) Summary of Previous Investigations within Historical Operational Area C Feature Feature Source Investigation Summary No. Description 22 (Cont.) Burn Pit Tetra Fifteen soil borings were drilled and sampled from 10 to 40 feet and 5 to 60 feet bgs Landfill Tech, at this location. The soil samples collected were analyzed for VOCs, SVOCs, 1-4- 2005 dioxane, perchlorate, Title 22 metals, and TPH. SVOCs, TPH, and 1,4-dioxane were not detected at concentrations above their respective reporting limits. Perchlorate was detected at concentrations ranging from 22.6 to 171,000 µg/kg. VOCs (i.e., acetone, benzene, chloroethane, and toluene) were detected at concentrations ranging from 1.1 to 40 µg/kg. The detected concentrations of acetone, benzene, and toluene are associated with laboratory cross-contamination. Metals were detected with arsenic detected at concentrations up to 1.20 mg/kg. A limited soil gas survey for VOCs will be performed for this feature. TCE, PCE, 1,1-DCE, 1,1,1-TCA and Freon- 113 were detected in the soil gas. Further investigations are proposed to provide additional soil contamination delineation. 23 Temporary This concrete pad area was used to temporarily store 55-gallon waste storage drums Storage Area prior to incinerating activities. The contents of the drums are unknown. Tetra Two soil borings were drilled to 20 feet bgs at this location. Samples were analyzed Tech, for VOCs, SVOCs, perchlorate, Title 22 metals, and 1,4-dioxane. SVOCs and 1,4- 2005 dioxane were not detected at concentrations above their respective reporting limits. Perchlorate was detected at concentrations ranging from 43.6 to 505 µg/kg. One VOC (i.e., acetone) was detected at concentrations ranging from 26 to 45 µg/kg. The detected concentration of acetone is associated with laboratory cross-contamination. Metals were detected with arsenic detected at concentrations up to 1.31 mg/kg. No VOCs were detected in soil gas samples. Further investigations are proposed to provide additional soil contamination delineation. 24 Beryllium This concrete pad with test mount was reported to have been used to test an Motor Test experimental beryllium motor. Stand Radian, Beryllium sampling was conducted in the area. The beryllium analytical results were 1986b reported at low concentrations over a wide area and concluded to be representative of background levels. Tetra Two soil borings were drilled to 5 feet bgs at this location. Samples collected were Tech, analyzed for VOCs and PCBs. PCBs were not detected above the reporting limits. 2005 VOCs (i.e., acetone and benzene) were detected at concentrations ranging from 2 to 85 µg/kg. The detected concentrations of acetone and benzene are associated with laboratory cross-contamination. No further investigations are proposed for this feature. 25 Burn Pit This feature consists of a concrete pad that was used as an equipment storage area. Magazine The type of chemicals stored at this feature are unknown. Tetra Three soil borings were drilled to 5 feet bgs at this location. Samples were analyzed Tech, for VOCs, SVOCs, 1,4-dioxane, and TPH. SVOCs, 1,4-dioxane, and TPH were not 2005 detected at concentrations above their respective reporting limits. VOCs (i.e., acetone and benzene) were detected at concentrations ranging from 39 to 46 µg/kg. The detected concentrations of acetone and benzene are associated with laboratory cross- contamination. No further investigations are proposed for this feature. Historical Operational Area Tetra A human health and ecological risk assessment will be performed for Historical C – Area Wide Investigation Tech, Operational Area C. As part of the risk assessment, a background assessment will be 2005 performed to evaluate naturally occurring metals (e.g., arsenic) at Historical Operational Area C.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 2-17 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

SECTION 3 INVESTIGATION APPROACH

3.1 INTRODUCTION

The subsurface soil investigation program is based on assessing site-specific features (i.e., burn pits, wash out areas, and subsurface structures, etc.) to complete a general overall assessment of the subsurface soil at Beaumont Site 1. Class 1 or Class 2 soil borings will be completed to provide additional information to the area of impact identified in the Soil Investigation Report for Historical Operational Areas A, B, and C at Beaumont Site 1 (Tetra Tech, 2005). “Class I” soil borings will address potential deep soil impacts by drilling method. “Class II” soil borings will address areas where impacts are not expected to extend into deep soils and direct push and hand auger techniques can be used to collect samples. The Class 1 borings will be completed to slightly above the groundwater table based on water level measurements from September 2005 to evaluate the potential for impact to groundwater. Only those features identified in Section 2 as requiring additional characterization are discussed below. Sampling locations were selected to further delineate the affected area. If impacts to soil were not delineated in any specific direction during previous investigations, soil sampling has been proposed to fill the data gap. Additional sampling may be required if this supplemental soil investigation program does not fully delineate impacts to soil from historical operations.

Additional maps are provided in Appendix A for each of the Historical Operational Areas. These maps include an operational area overview of the locations of previous and planned borings, existing monitoring wells; feature maps at a larger scale with locations of previous and planned borings, existing monitoring wells; and maps with graphical representations of perchlorate results from previous borings.

As specified in the Soil Investigation Work Plan I (Tetra Tech, 2003c), the locations of all sampling points will be surveyed in the field using global positioning surveying (GPS) techniques. The surveyed locations will be provided in the investigation report to be completed after the activities described in this supplemental sampling and analysis plan are complete.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 3-1 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

3.2 FEATURE SPECIFIC INVESTIGATION SCHEME

3.2.1 Historical Operational Area A (Eastern Aerojet Range)

Based on a review of previous investigations, one (1) feature of potential concern was identified in Historical Operational Area A as requiring supplemental investigation. A detailed description of the feature and planned soil boring is presented in Table 3-1, shown in Figure 3-1, and discussed in the following section. One Class 2 soil boring will be used to delineate the area of impact.

Planned Class 2 Soil Boring Based on a review of data from previous soil investigations, one (1) Class 2 soil boring has been planned for Historical Operational Area A, as follows:

Feature No. 6 Old Rocket Motor Casing is located in the northwestern portion of Historical Operational Area A. One (1) soil boring is proposed to characterize potential soil impact at the Old Rocket Motor Casing area. Soil samples collected at this feature will be analyzed for VOCs, SVOCs, perchlorate, Title 22 Metals, and 1,4-dioxane.

3.2.2 Historical Operational Area B (Rocket Motor Production Area)

Based on a review of previous investigations, seven (7) features of potential concern were identified in Historical Operational Area B as requiring supplemental investigation. A detailed description of each feature and planned soil borings is presented in Table 3-1, shown in Figure 3-2, and discussed in the following section. Class I soil borings will be used to further the area of impact. Two groundwater monitoring wells are proposed and will be drilled to a depth of about 15 feet below static groundwater. At the monitoring well locations, soil samples will be collected above the groundwater table.

Planned Class 1 Soil Borings Based on a review of data from previous soil investigations, a total of twenty (20) Class 1 soil borings have been planned for Historical Operational Area B, as follows:

Feature No. 9 Motor Washout Area is located in the south central portion of Historical Operational Area B. Perchlorate was detected in soil samples collected from soil borings at this feature (Tetra Tech, 2005). Three (3) additional soil borings are

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 3-2 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

Table 3-1 Summary of Sampling and Analysis Plan for Historical Operational Areas A through C

Old Rocket Soil borings 6 A Motor A6-HAS1 Class 2 1 5' bgs - - 2 - 2 2 2 2 2 Casing 0.5' and 5'

B9- Motor HSAS1 to Soil borings 9 B Washout Class 1 3 20' bgs - - 9 - - - 9 - - B9- Area 0.5', 5', 10', 15' and 20' HSAS3

Propellant B10- Soil borings Mixing HSAS4 to 10 B Class 1 4 30' bgs - - 0.5', 5', 10', 15', 20', 25' 15 - - - 15 - - Station B10- (Bldg 315) HSAS7 and 30'

B11- HSAS8 to B11- Soil borings Fuel Slurry HSAS10 0.5', 5', 10', 15', 20', 25' 11 B Station And Class 1 3 30' bgs 3 30' bgs and 30' 9 9 - - 9 - - (Bldg 317) B11-GS8 Soil gas probes to B11- 10', 20', and 30' GS10

B14- Soil borings Pad with HSAS11 0.5', 5', 10', 15', 20', 25' 14 B Class 1 3 30' bgs - - 9 - - - 9 - - Dry Well to B14- and 30' HSAS13

Cast and B18- Cure HSAS14 Soil borings 18 B Class 1 3 20' bgs - - 9 - - - 9 - - Station to B18- 0.5', 5', 10', 15' and 20' (Bldg 316) HSAS16

B19- Pad on HSAS17 Soil borings 19 B Class 1 2 20' bgs - - 6 - - - 6 - - Berm to B19- 0.5', 5', 10', 15' and 20' HSAS18 Pad South of Mix B20- Soil borings Station HSAS19 20 B Class 1 2 30' bgs - - 0.5', 5', 10', 15', 20', 25' 3 - - - 3 - - Bunker to B20- (Bldg HSAS20 and 30' 315A)

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 3-3 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

Table 3-1 Summary of Sampling and Analysis Plan for Historical Operational Areas A through C

Supplemental Soil Investigation Number Tested Sampling Plan Approach Samples Analytical Scheme of Tested Soil Samples Historical Feature Borehole Borehole Perchlorat Operational Feature Number Number VOCs SVOCs 1,4-dioxane No. No. Class e Title 22 Area of Soil Depth of Soil Gas Depth Sampling Interval Soil Soil Gas Method Method Method Method Metals Borings Points 8260B 8270C 8270SIM 314.6 Soil borings C22-HSAS21 to C22- HSAS24 0.5', 5', 10', 15', 20’, 25’, 30’, 35’, 40’, 45’, 50’, 55’, and 60' C22- C22-HSAS25 to C22- HSAS21 HSAS26 to C22- 0.5', 5', 10', 15', 20’, Burn Pit HSAS26 4-60' bgs 4-50' bgs 22 C Class 1 6 6 25’, 30’, 35’, 40’, 45’, 18 28 18 - 18 - - Landfill and 2-50’ bgs 2-40’ bgs C22-GS21 and 50’ to C22- Soil gas probes GS26 C22-GS21 to C22- GS24 10', 20’, 30’, 40’, and 50’ C22-GS25 to C22- GS26 10', 20’, 30’, and 40’

C22- Soil borings Temporary HSAS-27 0.5', 5', 10', 15', 20’, 23 C Storage Class 1 2 2-40’bgs - - 6 ------and C22- Area 25’, 30’, 35’ and 40’ HSAS-28

C23-SS1 New Surface Surface Samples 8 (Beryllium C to 8 0.5’bgs - - 8 - - - - - AOC Samples C23SSS8 0.5’ only)

One borehole at Features 10 and 14 will be converted to a groundwater monitoring well. “Class I” soil borings will address potential deep soil impacts by drilling method. “Class II” soil borings will address areas where impacts are not expected to extend into deep soils and direct push and hand auger techniques can be used to collect samples. bgs- below ground surface Soil gas probes will be placed within boring of same locational number. The sample label shall consist of: “C” = Historical Operational Area Number = Feature Number “HSA”= Hollow Stem Auger or “G” = Soil Gas “S”=Supplemental Soil Investigation Number = Activity Number Sample Depth

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 3-4 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

7 9

\ L

O }

F o r m e r G a t e H o u s e ( 2 2 )

D e t a i l

( F e a t u r e # 5 )

E m p t y 2 5 G a l l o n

0 5 0 0 1 , 0 0 0 1 , 5 0 0

9 M

a p A r e a

D r u m ( 2 4 )

F e e t

( F e a t u r e # 7 )

B e a u m o n t S i t e 1

A d a p t e d f r o m :

R e v e t m e n t s f o r

2 0 0 3 a e r i a l p h o t o g r a p h .

A v a n t i M o t o r S t o r a g e

( F e a t u r e # 1 )

S t o r a g e R e v e t m e n t s

( F e a t u r e # 4 )

L E G E N D

S u p p l e m e n t a l I n v e s t i g a t i o n

S o i l B o r i n g L o c a t i o n

A 6 H A S 1

r e v i o u s S o i l B o r i n g L o c a t i o n

l d R o c k e t

M o t o r C a s i n g

r e v i o u s S o i l B o r i n g a n d

( F e a t u r e # 6 )

S o i l G a s S a m p l e L o c a t i o n

B e a u m o n t S i t e 1

r o p e r t y B o u n d a r y

i s t o r i c a l O p e r a t i o n a l

A r e a B o u n d a r y

U n k n o w n S t r u c t u r e

( F e a t u r e # 3 )

B e a u m o n t S i t e 1

F i g u r e 3 1

T e s t F i r i n g A r e a

( F e a t u r e # 2 )

H i s t o r i c a l O p e r a t i o n a l A r e a A

E a s t e r n A e r o j e t R a n g e ( A v a n t i )

P l a n n e d S o i l B o r i n g L o c a t i o n M a p

T e t r a T e c h , I n c . D e c e m b e r 2 0 0 6

L o c k h e e d M a r t i n B e a u m o n t S i t e 1

S u p p l e m e n t a l S o i l I n v e s t i g a t i o n , S a m p l i n g a n d A n a l y s i s P l a n f o r

H i s t o r i c a l O p e r a t i o n a l A r e a s A , B a n d C

7 9

\ L

O }

D e t a i l

a p A r e a

0 1 0 0 2 0 0 3 0 0 F e e t

B e a u m o n t S i t e 1

A d a p t e d f r o m :

2 0 0 3 a e r i a l p h o t o g r a p h .

C h e m c a l S t o r a g e

B 1 1 H S A S 8

Q u o n s e t H u t

( B u l d n g 3 1 9 )

i i

F u e l S l u r r y S t a t o n

( F e a t u r e # 1 2 )

( B u l d n g 3 1 7 )

i i

( F e a t u r e # 1 1 )

B 1 1 H S A S 1 0

C o n c r e t e P a d

B 1 1 H S A S 9

B 1 4 H S A S 1 1

t h D r y W e l l

w i

L E G E N D

( F e a t u r e # 1 4 )

B 1 4 H S A S 1 2

S u p p l e m e n t a l I n v e s t i g a t i o n S o i l

B 1 0 H S A S 4

B o r i n g S a m p l e L o c a t i o n

( B u l d n g 3 1 5 )

i i

r e v i o u s S o i l B o r i n g a n d

B 1 4 H S A S 1 3

P r o p e l l a n t n g S t a t o n

i x i i

S o i l G a s S a m p l e L o c a t i o n

( F e a t u r e # 1 0 )

( 3 1 5 A ) E l e c t r c a l E n c l o s u r e

i s t o r i c S i t e o r A s s e s s m e n t

B 1 0 H S A S 7

B l u e o t o r

( F e a t u r e # 1 5 )

i n d i n g L o c a t i o n

B u r n P t

B 1 0 H S A S 5

C o n c r e t e U t l t y P a d

i i

( F e a t u r e # 8 )

( F e a t u r e # 2 0 )

B 1 0 H S A S 6

B 2 0 H S A S 2 0

B 2 0 H S A S 1 9

B 1 9 H S A S 1 7

C o n c r e t e P a d o n B e r m

B 9 H S A S 1 ( F e a t u r e # 1 9 )

B 1 9 H S A S 1 8

o t o r

W a s h o u t

B 9 H S A S 2

A r e a

B 9 H S A S 3

B 1 8 H S A S 1 4

B e a u m o n t S i t e 1

F i g u r e 3 2

B 9 H S A S 1 6

( B u l d n g 3 1 6 ) C a s t

i i

H i s t o r i c a l O p e r a t i o n a l A r e a B

a n d C u r e S t a t o n

E l e c t r c a l E n c l o s u r e ( 6 0 )

R o c k e t M o t o r P r o d u c t i o n A r e a

( F e a t u r e # 1 8 )

F e a t u r e # 1 6 )

( S

o u t h e r n P o r t i o n )

P l a n n e d o i l B o r i n g L o c a t i o n M a p

B 1 8 H S A S 1 5

T e t r a T e c h , I n c . D e c e m b e r 2 0 0 6

L o c k h e e d M a r t i n B e a u m o n t S i t e 1

S u p p l e m e n t a l S o i l I n v e s t i g a t i o n , S a m p l i n g a n d A n a l y s i s P l a n f o r

H i s t o r i c a l O p e r a t i o n a l A r e a s A , B a n d C

proposed to further delineate perchlorate contamination to the east, west and north of the Motor Washout Area where the limits of soil impact have not been defined. Soil samples collected at this feature will be analyzed for perchlorate.

Feature No. 10 Propellant Mixing Station (Building 315) is located in the central portion of Historical Operational Area B. Perchlorate was detected in soil samples collected from soil borings at this feature (Tetra Tech, 2005). Four (4) additional soil borings are proposed to further delineate perchlorate contamination to the east, west and south of the Propellant Mix Station where the limits of soil impact have not been defined. Soil samples collected at this feature will be analyzed for perchlorate. One groundwater monitoring well is proposed to be installed at Feature No. 10 to determine if soil impact at this feature has impacted groundwater. The monitoring well will be installed in the boring of B10-HSAS5. This monitoring well will be installed, developed and sampled in accordance with the procedures described in the Final Groundwater Well Installation Work Plan (Tetra Tech, 2004) and the Revised Groundwater Sampling and Analysis Plan (Tetra Tech, 2003a). It is estimated that the monitoring well may be up to 30 feet in depth, but shallow bedrock may be encountered due to the proximity of the feature to bedrock outcrops. The well is expected be installed with up to 20 feet of screen. The screen length was selected to be 20 feet because water level fluctuations exceeding 25 feet have been observed in years of high rainfall. However, the exact depth of the monitoring well and the length of the screen interval will be based on site conditions and will be determined in the field by the geologist. The collected groundwater sample will be analyzed for VOCs, 1,4-dioxane, and perchlorate. If impacted groundwater is detected, further assessment will be performed under the groundwater characterization program. Feature No. 11 Fuel Slurry Station (Building 317) is located in the central portion of Historical Operational Area B. Perchlorate was detected in soil samples collected from soil borings at this feature (Tetra Tech, 2005). Three (3) additional soil borings are proposed to further delineate perchlorate contamination to the southeast, southwest and northeast of the Fuel Slurry Station. Soil samples collected at this feature will be analyzed for perchlorate where the limits of soil impact have not been defined.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 3-7 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

A limited soil gas survey will be performed for VOCs with soil gas probes placed in the borings drilled for soil sampling. Feature No. 14 Pad with Dry Well is located in the central portion of Historical Operational Area B. Perchlorate was detected in soil samples collected from soil borings at this feature (Tetra Tech, 2005). Three (3) additional soil borings are proposed to further delineate perchlorate contamination to the north and east of the Pad with Dry Well where the limits of soil impact have not been defined. Soil borings drilled and sampled to the east of Feature No. 10 (Propellant Mixing Station) may also provide information relevant to this feature. Soil samples collected at this feature will be analyzed for perchlorate. One groundwater monitoring well is proposed to be installed at Feature No. 14 to determine if soil impact at this feature has impacted groundwater. The monitoring well will be installed in the boring of B14-HSAS11 near the pad. This monitoring well will be installed, developed and sampled as described for the monitoring well at Feature 10. If impacted groundwater is detected, further assessment will be performed under the groundwater characterization program. Feature No. 18 Cast and Cure Station (Building 316) is located in the southern portion of Historical Operational Area B. Perchlorate was detected in soil samples collected from soil borings at this feature (Tetra Tech, 2005). Three (3) additional soil borings are proposed to further delineate perchlorate contamination to the east, west and south of the Cast and Cure Station. Soil samples collected at this feature will be analyzed for perchlorate. Feature No. 19 Pad on Berm is located in the southern portion of Historical Operational Area B. Perchlorate was detected in soil samples collected from soil borings at this feature (Tetra Tech, 2005). Two (2) additional soil borings are proposed to further delineate perchlorate contamination to the north and south of the Pad on Berm where the limits of soil impact have not been defined. Soil samples collected at this feature will be analyzed for perchlorate. Feature No. 20 Pad South of Mix Station Bunker (Building 315A) is located in the central portion of Historical Operational Area B. Perchlorate was detected in soil samples collected from soil borings at this feature (Tetra Tech, 2005). Two (2) additional soil borings are proposed to further delineate perchlorate contamination to the southeast and southwest of the Pad South of the Mix Station Bunker where the

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 3-8 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

limits of soil impact have not been defined. Soil samples collected at this feature will be analyzed for perchlorate.

3.2.3 Historical Operational Area C (Burn Pit Area)

Based on a review of previous investigations, a total of two (2) historical features were identified in Historical Operational Area C as requiring additional investigation. A detailed description of each feature and the planned soil and soil gas boring locations are presented in Table 3-1, shown in Figure 3-3 and 3-4, and discussed in the following section.

Planned Class 1 Soil Borings and Soil Gas Points Based on a review of data from previous soil investigations, a total of eight (8) Class 1 soil borings have been planned for Historical Operational Area C, as follows:

Feature No. 22. Burn Pit Landfill is located in the eastern portion of Historical Operational Area C. Perchlorate was detected in soil samples collected from soil borings at this feature, and TCE and 1-1-DCE was detected in soil gas (Tetra Tech, 2005). Six (6) additional soil borings are proposed to further delineate perchlorate contamination to the southeast and southwest of the Burn Pit Landfill where the limits of soil impact have not been defined and unevaluated former pits are located. Should impacts to soil be detected in pits in these areas, additional borings may be required. Soil samples collected at this feature will be analyzed for perchlorate and VOCs. Up to 10 soil samples may be tested for dioxins and furans by Method 8290 and n-nitrosodimethylamine (NDMA) by Method 1625A. The samples tested for dioxins and furans and NDMA will be selected based on assessment of soil from the boring. Samples will be selected from locations beneath burn pits below any fill materials that were placed during the remediation of the burn pit area. A limited soil gas survey will be performed for VOCs.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 3-9 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

7 9

\ L

O }

D e t a i l

0 1 0 0 2 0 0 3 0 0 F

a p A r e a

e e t

B e a u m o n t S i t e 1

A d a p t e d f r o m :

2 0 0 3 a e r i a l p h o t o g r a p h .

L E G E N D

S u

p p l e m e n t a l I n v e s t i g a t i o n

S S

o i l B o r i n g a n d o i l G a s

C 2 2 H S A S 2 2

a m p l e L o c a t i o n

u S S

P r e v i o s o i l B o r i n g a n d o i l

G a s a m p l e L o c a t i o n

i s t o r i c a l O p e r a t i o n a l

A r e a B o n d a r y

C 2 2 H S A S 2 1

B r n P i t T r e n c h L o c a t i o n

C 2 2 H S A S 2 6

C 2 2 H S A S 2 5

C 2 2 H S A S 2 3

C 2 2 H S A S 2 4

B e a u m o n t S i t e 1

F i g u r e 3 3

H i s t o r i c a l O p e r a t i o n a l A r e a C F e a t u r e 2 2

B u r n P i t A r e a

P l a n n e d S o i l B o r i n g

a n d S o i l G a s L o c a t i o n M a p

T e t r a T e c h , I n c . D e c e m b e r 2 0 0 6

L o c k h e e d M a r t i n B e a u m o n t S i t e 1

S u p p l e m e n t a l S o i l I n v e s t i g a t i o n , S a m p l i n g a n d A n a l y s i s P l a n f o r

H i s t o r i c a l O p e r a t i o n a l A r e a s A , B a n d C

7 9

\ L

O }

D e t a i l

0 1 0 0 2 0 0 3 0 0 4 0 0 F

a p A r e a

e e t

B e a u m o n t S i t e 1

A d a p t e d f r o m :

2 0 0 3 a e r i a l p h o t o g r a p h .

L E G E N D

S u p p l e m e n t a l I n v e s t i g a t i o n S o i l

B u r n P i t A r e a

( F

B o r i n g L o c a t i o n e a t u r e # 2 2 )

S u p p l e m e n t a l I n v e s t i g a t i o n

S u r f a c e S o i l S a m p l e L o c a t i o n

r e v i o u s S o i l B o r i n g L o c a t i o n

r e v i o u s S o i l B o r i n g a n d

S o i l G a s S a m p l e L o c a t i o n

i s t o r i c a l O p e r a t i o n a l

A r e a B o u n d a r y

B u r n i t T r e n c h L o c a t i o n

B u r n P i t M a g a z i n e

( F

T e a t u r e # 2 5 )

e m p o r a r y W a s t e

C 2 3 H S A S 2 7

t o r a g e A r e a

( F

e a t u r e # 2 3 )

C 2 3 H S A S 2 8

B e r y l l i u m M o t o r

C 2 3 S S 1

e s t t a n d

B e a u m o n t S i t e 1

( F

e a t u r e # 2 4 )

C 2 3 S S 2

C 2 3 S S 3

F i g u r e 3 4

C 2 3 S S 4

C 2 3 S S 5

H i s t o r i c a l O p e r a t i o n a l A r e a C F e a t u r e 2 3

B u r n P i t A r e a

C 2 3 S S 6

P l a n n e d S o i l B o r i n g L o c a t i o n M a p

C 2 3 S S 8

C 2 3 S S 7

T e t r a T e c h , I n c . D e c e m b e r 2 0 0 6

L o c k h e e d M a r t i n B e a u m o n t S i t e 1

S u p p l e m e n t a l S o i l I n v e s t i g a t i o n , S a m p l i n g a n d A n a l y s i s P l a n f o r

H i s t o r i c a l O p e r a t i o n a l A r e a s A , B a n d C

Feature No. 23. Temporary Storage Area is located in the eastern portion of Operational Area C. Perchlorate was detected in soil samples collected from the soil boring at this feature (Tetra Tech, 2005). Two (2) additional borings are proposed to further delineate perchlorate contamination to the east and south of the Temporary Storage Area. Soil samples at this feature will be analyzed for perchlorate. A discussion of surface sampling south of Feature 23 is presented in Section 3.2.5.

3.2.4 Percolation Tests

Percolation tests are also proposed to provide preliminary data for evaluation of potential future remedial actions. The percolation tests will provide an initial assessment of the ability to deliver an electron donor to support bioremediation of potentially affected soils at Beaumont Site 1. The percolation tests will provide a preliminary evaluation on the feasibility of percolating treatment fluid through the vadose zone to groundwater. This information will be used to design treatability tests. The percolation tests will be conducted at Feature No. 9 in Historical Operational Area B and at Feature No. 22 in Historical Operational Area C.

Percolation testing will consist of drilling holes with minimum 10-inch diameter augers to various depths, saturation of the surrounding soils with water, and measurement of the rate of water percolation. The percolation test holes will be drilled to the test depths shown in Table 3-2 at the locations shown in Figures 3-5 and 3-6. Approximately 2 feet of coarse sand will be placed at the base of the borehole through the augers. Piping consisting of a 5-foot section of PVC drain pipe and sufficient solid pipe to reach ground surface will be installed in the borehole through the augers. Coarse sand will be placed through the augers around the bottom 6 feet of the piping while the augers are being withdrawn. A one-foot layer of bentonite will be placed on top of the sand. After the sand pack and bentonite is placed, the drill rig will be moved from the drilling location.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 3-12 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

Table 3-2 Summary of Percolation Tests

Feature Historical Percolation Test Test Depths Feature No. Operational Area Number (feet bgs)

Motor Washout 9 B B9-PERCA 10 Area

22 C Burn Pit Landfill C22-PERCB 10, 20, 30, and 40

22 C Burn Pit Landfill C22-PERCC 10, 20, 30, and 40

bgs- below ground surface

The percolation test will consist of a soak period followed by monitoring of the rate of percolation. During the soak period, potable water will be poured down the piping and maintained at a level approximately 5 feet from the bottom of the piping. The water level will be measured with a transducer or water level indicator every 10 to 15 minutes and water added as needed to bring the level back to about 5 feet from the bottom of the piping. After 4 hours of soaking, the rate of percolation will be measured. To measure the rate of percolation, a transducer or water level indicator will be lowered to the base of the piping and the water level will again be brought to the 5-foot level. The transducer will be left in the piping to monitor water level drop until the water level has dropped below the base of the piping or 12 hours have passed, whichever is shorter.

At the completion of the test, the piping will be pulled from the borehole and the borehole backfilled with bentonite.

The drop in water level will be qualitatively evaluated to determine the relative ease of infiltrating an electron donor into potentially affected soils.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 3-13 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

C h e m c a l S t o r a g e

Q u o n s e t H u t

u e l S l u r r y S t a t o n

0 1 0 0 2 0 0 3 0 0 F e e t

A d a p t e d f r o m :

2 0 0 3 a e r i a l p h o t o g r a p h .

C o n c r e t e P a d

t h D r y W e l l

w i A

P r o p e l l a n t n g

i x i

S t a t o n

( 3 1 5 A ) E l e c t r c a l E n c l o s u r e

L E G E N D

e r c o l a t i o n T e s t L o c a t i o n

i s t o r i c S i t e o r A s s e s s m e n t

i n d i n g L o c a t i o n

o t o r

W a s h o u t

A r e a 9

D e t a i l

a p A r e a

B 9 P E R C A

C a s t a n d

B e a u m o n t S i t e 1

C u r e S t a t o n

F i g u r e 3 5

B e a u m o n t S i t e 1

H i s t o r i c a l O p e r a t i o n a l A r e a B

R o c k e t M o t o r P r o d u c t i o n A r e a

( S

o u t h e r n P o r t i o n )

P l a n n e d P e r c o l a t i o n T e s t L o c a t i o n M a p

T e t r a T e c h , I n c . D e c e m b e r 2 0 0 6

L o c k h e e d M a r t i n B e a u m o n t S i t e 1

S u p p l e m e n t a l S o i l I n v e s t i g a t i o n , S a m p l i n g a n d A n a l y s i s P l a n f o r

H i s t o r i c a l O p e r a t i o n a l A r e a s A , B a n d C

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0 1 0 0 2 0 0 3 0 0 F

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B e a u m o n t S i t e 1

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2 0 0 3 a e r i a l p h o t o g r a p h .

B u r n P i t A r e a

L E G E N D

( F

e a t u r e # 2 2 )

e r c o l a t i o n T e s t L o c a t i o n

i s t o r i c a l O p e r a t i o n a l

B u

A r e a o n d a r y

B u P

r n i t T r e n c h L o c a t i o n

C 2 2 P E R C B

B e a u m o n t S i t e 1

F i g u r e 3 6

H i s t o r i c a l O p e r a t i o n a l A r e a C

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C 2 2 P E R C C T T

e t r a e c h , I n c . D e c e m b e r 2 0 0 6

L o c k h e e d M a r t i n B e a u m o n t S i t e 1

S u p p l e m e n t a l S o i l I n v e s t i g a t i o n , S a m p l i n g a n d A n a l y s i s P l a n f o r

H i s t o r i c a l O p e r a t i o n a l A r e a s A , B a n d C

3.2.5 Potentially Uncharacterized Features

During recent interviews with two former Lockheed Propulsion Company (LPC) employees with personal knowledge of historical activities at Site 1, additional area rocket motor test areas and burn pits were tentatively identified. Three to four tests of a rocket motor reportedly may have occurred near the intersection of Historical Operational Areas B, C, and D, which may have included firing of a 50-caliber machine gun into rocket motors. Testing of a perchlorate-based propellant with aluminum was believed to have been performed east of the Burn Pit Area. The former employee also believed that testing of the beryllium motors occurred to the south of the Temporary Waste Storage Area (Feature 25) and east of current Burn Pit Landfill (Feature 22). Additional burn pits may have been located between the Feature 22 boundary and the Propellant Mix Station (Feature 10).

A geophysical survey will be performed in the areas identified as containing the potential uncharacterized features. The geophysical survey will measure electrical conductivity in a grid pattern with approximate spacing of 10 feet over the surface area shown in Figure 3-7. An electromagnetic induction instrument, Geonics model EM-31 or equivalent, will be used to measure the apparent electrical conductivity of the ground at the burn pit landfill. This instrument is used to locate trenches or pits containing metallic and/or nonmetallic debris.

Surface soil sampling is proposed south of the Temporary Waste Storage Area (Feature 25) in the area identified as a beryllium motor test location. Since testing of these motors that used beryllium as a propellant would have caused impacts to surface soil and beryllium has low mobility in soils, the soil samples will be taken from the ground surface to 0.5 feet in depth using hand sampling techniques at the locations shown in Figure 3-4. The soil samples will be tested for beryllium.

3.3 SOIL INVESTIGATION PROGRAM

The following subsections present the planned drilling and soil gas probe locations along with the sampling depths and analytical scheme in Historical Operational Areas A, B, and C of Beaumont Site 1. No changes to the soil investigations described in this Sampling and Analysis Plan will be implemented without prior approval from the DTSC.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 3-16 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

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a p A r e a

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( 3 1 5 A ) E l e c t r c a l E n c l o s u r e B e a u m o n t S i t e 1

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( F e a t u r e # 1 5 )

2 0 0 3 a e r i a l p h o t o g r a p h .

C o n c r e t e U t l t y P a d

i i

( F e a t u r e # 2 0 )

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L E G E N D

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r o p e r t y B o u n d a r y

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E l e c t r c a l E n c l o s u r e ( 6 0 )

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N o t e :

P t A r e a

P o s s i b l e b e r m s o u t h o f B a l l i s t i c s T u n n e l c o r r e s p o n d s

t o l o c a t i o n o f C l a s s A S t o r a g e s u r v e y a r e a b o u n d a r y .

B e a u m o n t S i t e 1

P o s s l e B e r m

i b

T e t r a T e c h , I n c . D e c e m b e r 2 0 0 6

L o c k h e e d M a r t i n B e a u m o n t S i t e 1

S u p p l e m e n t a l S o i l I n v e s t i g a t i o n , S a m p l i n g a n d A n a l y s i s P l a n f o r

H i s t o r i c a l O p e r a t i o n a l A r e a s A , B a n d C

3.3.1 Soil Boring Investigation

Based on the data from previous soil investigations, a total of 10 assessment features were identified within Historical Operational Areas A, B, and C as requiring additional delineation of contamination. These features will be assessed by drilling and sampling subsurface soil at or near to the feature. Figures 3-1 through 3-4 show the locations of the 10 assessment features in Historical Operational Areas A, B, and C. Table 3-1 presents the features identified as requiring further information to delineate soil impact, number of soil borings, soil gas probes, assessment depths, and feature specific analyses. The sampling procedure and analytical protocols for the soil sampling program are presented in the Site Specific Quality Assurance Project Plan (QAPP) in Appendix A of the Site Investigation Work Plan, (Tetra Tech, 2003c). Quality assurance samples will include trip blanks for VOC testing, equipment blanks, and replicate samples. Trip blanks for VOC testing and equipment blanks will be taken daily and replicate samples will be taken at a frequency of 10% of the environmental samples. The data will be validated based on US Environmental Protection Agency standards. An evaluation will be made of laboratory procedures for quality control issues identified during data validation.

Class 1 Soil Borings Based on historical operations and findings, a total of 28 Class I soil borings will be drilled within Historical Operational Areas B and C, as shown in Figures 3-2 through 3-4. Twenty (20) borings are within Historical Operational Area B and 8 are within Historical Operational Area C. The 28 Class 1 soil borings will involve drilling 940 linear feet and collecting a total of 84 soil samples.

Two groundwater monitoring wells will be installed in borings in Historical Operational Area B.

Test Sample Selection Protocol A minimum of three samples will be selected for testing from each boring. The samples shall be selected based on conditions encountered during drilling and information from previous investigations. Additional samples may also be selected if indicated by field conditions that the minimum three samples per boring are not sufficient to establish the vertical extent and range of impacts to soil in a boring.

For borings deeper than 20 ft bgs, one sample shall be selected from the depth of interval of 0 to 10 ft bgs. For borings away from the likely source of contamination, sample shall be selected for testing such that (in the approximate order of priority):

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 3-18 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

– If OVA readings of a sample exceed 10 times background, the sample shall be selected for testing; – If during drilling, staining or odors are noted indicative of a chemical release, soil samples shall be selected for testing at a minimum interval of 10 ft throughout the impacted depths in the boring; – The test sample selected shall be at a depth equal to or deeper than the shallowest sample in which contamination was found in the nearest boring closer to the likely source; – The degree of impact with depth in nearby boring shall be considered (e.g. if contamination at 5 feet in depth in the nearby boring is 100 times that of the 0.5 foot sample, the selected sample should be at 5 or 10 feet, depending on field conditions); – The selected test sample should contain fine-grained materials (e.g. a sample with fine-grained material would be selected over a clean sand); and – If no contamination was detected in the 0 to10 ft range in the nearby boring, the 10 ft bgs sample shall be selected for testing if the main contaminant of concern is perchlorate and the 5 ft bgs sample shall be selected for testing if the main contaminant of concern is PCBs. A minimum of two samples shall be selected from the depth interval of 15 ft bgs to total depth based on the following (in the approximate order of priority): – If OVA readings of a sample exceed 10 times background, the sample shall be selected for testing. – If during drilling, staining or odors are noted indicative of a chemical release, soil samples shall be selected for testing at a minimum interval of 10 ft throughout the impacted depths in the boring and a sample 10 ft below the impacted interval or the deepest sample in the boring, whichever is shallowest, shall also be selected. – Depending on soil type as described above, one of the two deepest samples shall be selected for testing; – The test sample selected shall be at a depth equal to or deeper than the sample with the highest concentration of the contaminant of concern at or below 15 ft bgs in the nearest boring closer to the likely source considering the degree of impact as discussed above; and – The selected test sample should contain fine-grained materials (e.g. a sample with fine-grained material would be selected over a clean sand).

For borings drilled to 20 feet, two samples shall be selected from the depth of interval of 0 to 15 ft bgs as described above and 20 foot sample shall be selected for testing unless otherwise indicated by field conditions.

For borings within possible source areas such as the Burn Pit Area, the following procedures shall be used for test sample selection for the depth interval of 0 to 10 ft bgs: – If OVA readings of a sample exceed 10 times background, the sample shall be selected for testing. – In the Burn Pit Area the 10 foot sample shall be selected because the remedial action removed surface soils (unless evidence of burned or stained soils is observed during drilling); – If evidence of burned or stained soils is observed during drilling in the Burn Pit Area, these soils shall be selected for tested; and – The selected test sample should contain fine-grained materials (e.g. a sample with fine-grained material would be selected over a clean sand).

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 3-19 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

Class 2 Soil Borings Based on historical operations and findings, one (1) Class 2 soil boring will be drilled within Historical Operational Area A, as shown in Figure 3-1. The Class 2 soil boring will involve drilling 5 linear feet and collecting a total of 2 soil samples.

3.3.2 Soil Gas Survey

In conjunction with the soil boring program, a limited soil gas survey will also be performed to further delineate volatile organic compounds (VOCs) in the soil pore space. A total of three (3) soil gas sampling locations are planned within Historical Operational Area B and six (6) soil gas sampling locations within Historical Operational Area C. Three to five soil gas probes will be placed within a soil boring at depths of 10 to 50 feet bgs. Overall, a total of 37 soil vapor probes will be installed and sampled for VOCs using modified EPA Test Method 8260B. Table 3-1 presents a summary of the sample locations and the soil gas sampling depths. The soil gas sample locations are shown in Figures 3-2 and 3-3.

The sampling procedure and analytical protocols for the limited soil gas program are presented in the Site Specific QAPP in Appendix A of the Site Investigation Work Plan (Tetra Tech, 2003c).

3.3.3 Percolation Tests

Three sets of percolation tests will be performed in Historical Operational Areas B and C. The tests will be performed to test the relative percolation rate of soils from 10 feet bgs to about 10 feet above the water table. Test depths are provided in Table 3-2 and the test locations are shown in Figures 3-5 and 3-6.

3.3.4 Geophysical Survey and Surface Soil Sampling

A geophysical survey will be performed in the area shown in Figure 3-7 to attempt to locate buried metallic and non-metallic debris associated with former testing operations. These areas were identified as possible former test locations of rocket motors and burn pits during recent interviews with former LPC employees.

Eight surface soil samples will be collected south of Feature 23 in Historical Operational Area C as shown in Figure 3-4. The soil samples will be tested for beryllium to assess potential impacts from beryllium rocket motor testing.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 3-20 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

SECTION 4 REFERENCES

Radian Corporation, 1986a. Hydrogeologic Study Report, Lockheed Propulsion Company, Beaumont Test Facilities. December 1986a. ______, 1986b. Preliminary Remedial Investigation, Lockheed Propulsion Company Beaumont Test Facilities. December 1986. ______, 1990. Final Source and Hydrogeologic Investigation, Lockheed Propulsion Company Beaumont Test Facilities. February 1, 1990. ______,1992. Hydrogeologic Study, Lockheed Propulsion Company Beaumont Test Facilities. December 1992. ______, 1993. Burn Pit Area Removal Action Report, Lockheed Propulsion Company Beaumont Test Facilities. June 1993. Radian International, LLC, 1996. June 1996 Vapor Sampling Report, Lockheed Beaumont No. 1. October 10, 1996. ______1997. August 1997 Vapor Sampling Report; Revised, Lockheed Beaumont No. 1. August 17, 1997. Tetra Tech, Inc., 2002. Supplemental Site Characterization Report Beaumont Site 1 Lockheed Martin Corporation. September 2002. ______, 2003a. Revised Groundwater Sampling and Analysis Plan, Beaumont Site 1, Lockheed Martin Corporation, Beaumont, California. April 2003. ______, 2003b. Lockheed Beaumont, Site 1 & 2, Phase 1 Environmental Site Assessment, Beaumont, California. March 2003. ______, 2003c. Lockheed Beaumont Facilities, Preliminary Site Investigation Work Plan, Volume I, Beaumont, California. September 26, 2003. ______, 2004. Lockheed Martin Corporation, Final Groundwater Monitoring Well Installation Work Plan, Beaumont Site 2, Beaumont, California. January 2004. ______, 2005. Lockheed Martin Corporation, Soil Investigation Report, Beaumont Site 1, Historical Operational Areas A, B, and C, Beaumont, California. May 2005 with revisions of August 2005.

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN PAGE 4-1 FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

Appendix A Supplemental Information Previous Soil Boring and Monitoring Well Locations Previous Soil Boring Perchlorate Results

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

Appendix A Supplemental Information Previous Soil Boring and Monitoring Well Locations Previous Soil Boring Perchlorate Results

List of Figures

Figure A-1 Historical Operation Area A, Eastern Aerojet Range (Avanti), Previous and Planned Soil Borings and Existing Monitoring Wells Figure A-2 Historical Operation Area A, Eastern Aerojet Range (Avanti), Previous Soil Boring Perchlorate Results Figure A-3 Historical Operation Area B, Rocket Motor Production Area, Previous and Planned Soil Borings and Existing Monitoring Wells Figure A-4 Historical Operation Area B, Rocket Motor Production Area, Previous Soil Boring Perchlorate Results Figure A-5 Historical Operation Area B, Rocket Motor Production Area (Central East Portion), Previous and Planned Soil Borings and Existing Monitoring Wells Figure A-6 Historical Operation Area B, Rocket Motor Production Area (Central West Portion), Previous and Planned Soil Borings and Existing Monitoring Wells Figure A-7 Historical Operation Area B, Rocket Motor Production Area (South Central Portion), Previous and Planned Soil Borings and Existing Monitoring Wells Figure A-8 Historical Operation Area C, Burn Pit Area, Previous and Planned Soil Borings and Existing Monitoring Wells Figure A-9 Historical Operation Area C, Burn Pit Area, Previous Soil Boring Perchlorate Results

BEAUMONT SITE 1 SUPPLEMENTAL SOIL INVESTIGATION SAMPLING AND ANALYSIS PLAN FOR HISTORICAL OPERATIONAL AREAS A, B, AND C

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B 1 4 H S A S 1 2

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