new semiannual groundwater monitoring report fourth quarter … · 2020. 9. 11. · tetra tech,...

Prepared for: Prepared by:

TETRA TECH348 W. Hospitality Lane, Suite 100San Bernardino, California 92408TC# 22289-0103 / March 2009

Semiannual Groundwater Monitoring ReportFourth Quarter 2007 and First Quarter 2008

Lockheed Martin Corporation, Beaumont Site 2Beaumont, California

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TETRA TECH, INC. MARCH 2009

Semiannual Groundwater Monitoring Report i Fourth Quarter 2007 and First Quarter 2008 Beaumont Site 2

TABLE OF CONTENTS

1.0 INTRODUCTION ........................................................................................................................1-1 1.1 SITE BACKGROUND....................................................................................................1-1

2.0 SUMMARY OF MONITORING ACTIVITIES ..........................................................................2-1 2.1 GROUNDWATER LEVEL MEASUREMENTS...........................................................2-1 2.2 GROUNDWATER SAMPLING.....................................................................................2-1 2.3 SURFACE WATER SAMPLING...................................................................................2-8 2.4 ANALYTICAL DATA QA/QC ......................................................................................2-8 2.5 HABITAT CONSERVATION........................................................................................2-8

3.0 GROUNDWATER MONITORING RESULTS ..........................................................................3-1 3.1 GROUNDWATER ELEVATION...................................................................................3-1 3.2 GROUNDWATER FLOW..............................................................................................3-1 3.3 GROUNDWATER GRADIENTS...................................................................................3-1 3.4 ANALYTICAL DATA SUMMARY ............................................................................3-10

3.4.1 Data Quality Review.........................................................................................3-10 3.5 CHEMICALS OF POTENTIAL CONCERN ...............................................................3-14

3.5.1 Organic Analytes ..............................................................................................3-14 3.5.2 Organic COPCs ................................................................................................3-17 3.5.3 Inorganic Analytes............................................................................................3-17 3.5.4 Inorganic COPCs ..............................................................................................3-20

3.6 SURFACE WATER SAMPLING RESULTS...............................................................3-20 3.7 HABITAT CONSERVATION......................................................................................3-20

4.0 SUMMARY AND CONCLUSIONS ...........................................................................................4-1 4.1 GROUNDWATER ELEVATION AND FLOW.............................................................4-1

4.1.1 Groundwater Gradients.......................................................................................4-1 4.2 WATER QUALITY MONITORING..............................................................................4-2 4.3 GROUNDWATER MONITORING PROGRAM AND THE GROUNDWATER

QUALITY MONITORING NETWORK ........................................................................4-3 5.0 REFERENCES .............................................................................................................................5-1 6.0 ACRONYMS AND ABBREVIATIONS .....................................................................................6-1

LIST OF FIGURES

Figure 1-1 Regional Location Map of Beaumont Site 2 ............................................................................1-2 Figure1-2 Historical Operational Areas and Site Features ........................................................................1-4 Figure 2-1 Site Map ...................................................................................................................................2-3 Figure 2-2 Fourth Quarter 2007 Sample Locations ...................................................................................2-6 Figure 2-3 First Quarter 2008 Sample Locations.......................................................................................2-7 Figure 2-4 Storm Water Sampling Locations ............................................................................................2-9 Figure 3-1 Fourth Quarter 2007 Changes in Groundwater Elevations ......................................................3-3 Figure 3-2 First Quarter 2008 Changes in Groundwater Elevations..........................................................3-4 Figure 3-3 Fourth Quarter 2007 Groundwater Contours for First Groundwater .......................................3-5 Figure 3-4 Fourth Quarter 2007 Groundwater Contours for San Timoteo Formation...............................3-6 Figure 3-5 First Quarter 2008 Groundwater Contours for First Groundwater...........................................3-7


Semiannual Groundwater Monitoring Report ii Fourth Quarter 2007 and First Quarter 2008 Beaumont Site 2

Figure 3-6 First Quarter 2008 Groundwater Contours for San Timoteo Formation ..................................3-8 Figure 3-7 Perchlorate and TCE Concentrations – Fourth Quarter 2007 ................................................3-18 Figure 3-8 Perchlorate and TCE Concentrations – First Quarter 2008....................................................3-19

LIST OF TABLES

Table 2-1 Sampling Schedule and Analysis Method - Fourth Quarter 2007 .............................................2-4 Table 2-2 Sampling Schedule and Analysis Method - First Quarter 2008 ................................................2-5 Table 3-1 Groundwater Elevation Data - Fourth Quarter 2007 and First Quarter 2008............................3-2 Table 3-2 Summary of Horizontal and Vertical Groundwater Gradient....................................................3-9 Table 3-3 Summary of Detected Validated Organic Analytes - Fourth Quarter 2007 and First

Quarter 2008 ....................................................................................................................................3-12 Table 3-4 Summary of Detected Validated Inorganic Analytes – Fourth Quarter 2007 and First

Quarter 2008 ....................................................................................................................................3-13 Table 3-5 Summary Statistics of Validated Organic and Inorganic Analytes Detected Fourth

Quarter 2007 and First Quarter 2008 ...............................................................................................3-16 Table 3-6 Summary of Detected Validated Organic and Inorganic Analytes –Surface Water First

Quarter 2008 ....................................................................................................................................3-21

LIST OF APPENDICES

APPENDIX A Recent Environmental Activities and Conceptual Site Model

APPENDIX B Consolidated Data Summary Table

APPENDIX C Water Level Hydrographs and Precipitation Data

APPENDIX D Copies of the Field Data Sheets

APPENDIX E Well Construction Table

APPENDIX F Summary of Calculated Horizontal and Vertical Groundwater Gradients

APPENDIX G Validated Sample Results by Analytical Method

APPENDIX H Laboratory Analytical Data Packages

APPENDIX I COPC Time-Series Graphs


Semiannual Groundwater Monitoring Report 1-1 Fourth Quarter 2007 and First Quarter 2008 Beaumont Site 2

1.0 INTRODUCTION This Semiannual Groundwater Monitoring Report (Report) prepared by Tetra Tech, Inc. (Tetra Tech), on

behalf of Lockheed Martin Corporation (LMC), presents the results of the Fourth Quarter 2007 and First

Quarter 2008 groundwater quality monitoring activities of the Beaumont Site 2 (Site) Groundwater

Monitoring Program (GMP). The Site is located southwest of the City of Beaumont, Riverside County,

California (Figure 1-1). Currently, the Site is inactive with the exception of ongoing investigative

activities performed under Consent Order (88/89 034) with the Department of Toxic Substances Control

(DTSC).

The objectives of this Report are to:

• Briefly summarize the Site history;

• Document the water quality monitoring procedures and results;

• Analyze and evaluate the water quality monitoring data generated; and

• Re-evaluate the current Site GMP.

This Report is organized into the following sections: 1) Introduction, 2) Summary of Monitoring

Activities, 3) Groundwater Monitoring results, 4) Summary and Conclusions.

1.1 SITE BACKGROUND

The Site is a 2,668 acre parcel located southwest of Beaumont, California. The parcels that comprise the

Site were owned by individuals and the United States (U.S.) government prior to 1958. Between 1958 and

1960, portions of the Site were purchased by the Grand Central Rocket Company (GCR) and utilized as a

remote test facility for early space and defense program efforts. In 1960, Lockheed Aircraft Corporation

(LAC) purchased one-half interest in GCR. GCR became a wholly-owned subsidiary of LAC in 1961.

The remaining parcels of land that comprise the Site were purchased from the U.S. government between

1961 and 1964. In 1963, Lockheed Propulsion Company (LPC) became an operating division of LAC and

was responsible for the operation of the Site until its closure in 1974. The Site was utilized by GCR and

LPC from 1958 to 1974 for small rocket motor assembly, testing operations, propellant incineration, and

minor disposal activities. Ogden Labs is known to have leased portions of the Site in the 1970s (Radian,

1986a).

In 1989, the DTSC issued a consent order requiring LMC to cleanup contamination at the Site related to

past testing activities (CDHS, 1989). Based on investigative and cleanup activities performed at the Site,

the DTSC issued a no further remedial action letter to LMC in 1993.

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Based on regulatory interest in perchlorate and 1,4-dioxane, a groundwater sample was collected from an

inactive groundwater production well (identified as W2-3) at the Site in January 2003. The sample was

analyzed for volatile organic compounds (VOCs), perchlorate, and 1,4-dioxane to determine the potential

presence and concentration of those chemicals in groundwater. The analytical results indicated that VOCs

and 1,4-dioxane were not present at or above their respective method detection limits (MDLs). However,

perchlorate was reported at a concentration of 4,080 micrograms per liter (µg/L), which exceeded the

California Department of Health Services drinking water notification level (DWNL) of 6 µg/L. Based on

the detection of perchlorate in the groundwater sample collected, the DTSC reopened the Site for further

assessment.

Four (4) primary historical operational areas have been identified at the Site (Figure 1-2). Each

operational area was responsible for various activities associated with rocket motor assembly, testing, and

propellant incineration. A brief description of each operational area follows:

Historical Operational Area J (Area J) –Final Assembly

Rocket motor casings with solid propellant were transported to Building 250 where final assembly of the

rocket hardware was conducted. The building was used from 1970 to 1974 for final assembly and

shipment of short range attack missile rocket motors. Rocket motor assembly operations included

installation of the nozzle and headcap, pressure check of the motor, installation of electrical systems, and

preparations for shipment. During plant closure in 1974, all usable parts of this facility were dismantled,

taken off the Site, and sold (Radian, 1986a).

Historical Operational Area K (Area K) – Test Bays and Miscellaneous Facilities

The primary features included a large earthen structure known as the “Prism,” conditioning chambers, a

centrifuge, and four test bays and two associated bunkers.

The Prism was reportedly built between 1984 and 1990 and was used to test radar by General Dynamics

(Tetra Tech, 2007a). Details concerning construction of the Prism are not available, but it appears to have

been constructed with soils from near the test bays.

The conditioning chambers were used to examine the effects of extreme temperatures on rocket motors

and to meet specification requirements (Radian, 1986a). A centrifuge was located in the northwestern

portion of Area K, where rocket motors were tested in order to determine if the solid propellant would

separate from its casing under increased gravitational forces.

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Previously, only three test bays were known; however, a former employee reported during a recent

interview that a fourth test bay [located north of the other three bays] was also previously used in Area K.

The initial testing activities had a history of explosions that destroyed complete test areas, especially

during the period when GCR operated at the Site (Radian, 1986a). While vestiges from three test bays are

currently visible at the Site, the fourth was reportedly destroyed by such an explosion during testing. Also

reportedly, after motor failure, the area was checked to recover unburned propellant.

Historical Operational Area L (Area L) – Propellant Burn Area

Solid propellant was reportedly transported to the burn area and set directly on the ground surface for

burning (Radian, 1986a). No pits or trenches were dug as part of the burning process. The solid propellant

was saturated with diesel fuel to initiate combustion. Reportedly, the solid propellant would burn rapidly.

There is no evidence or physical features that identify the precise location of burning activities. Two

production wells were located in this area (W2-1 and W2-3). W2-1 was reported to have been part of the

agricultural homestead. The origin of W2-3 is unknown. The use of the wells is unknown. A waste

discharge permit from 1962 was recently discovered indicating that up to 5,000 gallons per year of waste

water from rocket testing operations could be discharged into small surface depressions located in a small

side canyon just south of Area L.

Historical Operational Area M (Area M) – Garbage Disposal Site

A garbage disposal area was located adjacent to a small creek at the Site (Radian, 1986a). Scrap metal,

paper, wood, and concrete materials were disposed of at the disposal site by LPC. Hazardous materials,

including explosives and propellants, were never disposed of at the disposal site by LPC according to

employee interviews. Ogden Labs, a company that tested valves and explosive items, also used this

disposal site. Reportedly, Ogden Labs disposed hazardous waste at the disposal site. In 1972, a Lockheed

Safety Technician was exposed to toxic vapors of unsymmetrical dimethyl hydrazine (u-DMH) from a

pressurized gas container located within the disposal site. Based on potential exposure risks to occupants,

LPC’s safety group required Ogden Labs to take measures to remove any potentially hazardous materials

at the disposal site. Shortly thereafter, a disposal company was contracted by Ogden Labs to clean up the

disposal site (Radian, 1986a)



2.0 SUMMARY OF MONITORING ACTIVITIES Section 2 summarizes the Fourth Quarter 2007 and First Quarter 2008 groundwater monitoring events

conducted at the Site. The results from these monitoring events are discussed in Section 3.0.

2.1 GROUNDWATER LEVEL MEASUREMENTS

The Fourth Quarter 2007 groundwater level measurements were collected from 21 monitoring wells and

one (1) piezometer on November 8, 2007. Prior to the start of the First Quarter 2008 monitoring event,

five (5) new wells were installed at the site. Therefore, for the First Quarter 2008 monitoring event

groundwater level measurements were collected from 26 monitoring wells and one (1) piezometer on

February 18, 2008. Figure 2-1 presents a site map showing the well locations. Copies of the field data

sheets from the water quality monitoring events are presented in Appendix D. A summary of well

construction details is presented in Appendix E.

2.2 GROUNDWATER SAMPLING

The groundwater monitoring schedule is reviewed annually during the Second Quarter groundwater

monitoring event. Fourth Quarter 2007 and First Quarter 2008 follow the schedule proposed in the

Second and Third Quarter 2006 monitoring report (Tetra Tech, 2007a) which was presented to the DTSC

in February 2007 and approved with no comments. The Fourth Quarter 2007 groundwater samples were

collected from 24 monitoring wells between November 15, 2007 and January 9, 2008. The First Quarter

2008 groundwater samples were collected from 18 monitoring wells between March 27 and 30, 2008.

Table 2-1 and 2-2 lists the wells monitored for the Fourth Quarter 2007 and First Quarter 2008

monitoring events, analytical methods, sampling dates, and Quality Assurance/Quality Control (QA/QC)

samples collected. Groundwater sampling, analytical, and QA/QC procedures for the monitoring event

were described in the Groundwater Monitoring Well Installation Work Plan (Tetra Tech, 2004a) and the

Groundwater Sampling and Analysis Plan (Tetra Tech, 2007b). Figures 2-2 and 2-3 illustrate the well

locations sampled.

The following water quality field parameters were observed and recorded on field data sheets (Appendix

D) during well purging activities: water level, temperature, pH, electrical conductivity (EC), turbidity,

dissolved oxygen (DO) and oxidation reduction potential (ORP). Collection of water quality parameters

was initiated when at least one (1) discharge hose / pump volume had been removed and purging was

considered complete when the above parameters had stabilized, or the well was purged dry (evacuated).

Stabilization of water quality parameters was used as an indication that representative formation water

had entered the well and was being purged. The criteria for stabilization of these parameters are as

follows: water level ± 0.1 foot, pH ± 0.1, and EC ± 3%, turbidity < 10 nephelometric turbidity units



(NTUs) (if > 10 NTUs ± 10%), DO ± 0.3 mg/L and ORP ± 10 mV. Sampling instruments and equipment

were maintained, calibrated, and operated in accordance with the manufacturer’s specifications,

guidelines, and recommendations. Groundwater samples were collected from the monitoring wells by

low-flow purging and sampling through bladder-type pumps. Dedicated bladder type pumps are installed

in all of the monitoring wells on the Site with the exception of TT-MW2-3 where a portable bladder pump

is used.

For the Fourth Quarter 2007 and First Quarter 2008 monitoring events, every effort was made to collect

groundwater samples in order of increasing perchlorate concentration. Samples were placed in

appropriate EPA method specified containers. A sample identification label was affixed to each sample

container, and sample custody was maintained by a chain-of-custody record. Groundwater samples

collected for the monitoring events were chilled and transported to Emax Laboratories, Inc., a state-

accredited analytical laboratory, via courier, thus maintaining proper temperatures and sample integrity.

Trip blanks (LTBs) were collected for the monitoring events to assess cross-contamination potential of

water samples while in transit. Equipment blanks (LEBs) were collected when sampling with non-

dedicated equipment to assess cross-contamination potential of water samples via sampling equipment.

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TT-M

W2-

2

TT-M

W2-

3

TT-M

W2-

5

TT-P

Z2-1

TT-M

W2-

8TT

-MW

2-7

TT-M

W2-

7D

TT-M

W2-

6STT

-MW

2-6D

TT-M

W2-

14

TT-M

W2-

16

TT-M

W2-

4DTT

-MW

2-4S

TT-M

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13

TT-M

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9S

TT-M

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9D

TT-M

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X:\GIS\Lockheed 22289-0103\Site.mxd



Table 2-1 Sampling Schedule and Analysis Method - Fourth Quarter 2007

Monitoring Well Location Sample Date VOCs (EPA

8260B) Perchlorate (EPA 314.0)

SVOCs (EPA 8270)

CAM 17 Metals Total

(SW6010B/ 7470)

Comments and QA /QC Samples

TT-MW2-1 11/15/07 X X

TT-MW2-3 11/20/07 X X

TT-MW2-4S 11/16/07 X X

TT-MW2-5 11/20/07 X X

TT-MW2-6S 11/19/07 X X

TT-MW2-6D 11/19/07 X X

TT-MW2-7 11/19/07 X X

TT-MW2-7D 01/09/08 X X

TT-MW2-8 11/19/07 X X

TT-MW2-9S 11/16/07 X X

TT-MW2-9D 11/16/07 X X

TT-MW2-10 11/15/07 X X

TT-MW2-11 11/15/07 X X

TT-MW2-12 11/16/07 X X

TT-MW2-13 11/15/07 X X MS/MSD, Duplicate

TT-MW2-14 11/16/07 X X

TT-MW2-16 11/15/07 X X

TT-MW2-17S 11/16/07 X X

TT-MW2-17D 11/16/07 X X Duplicate

TT-MW2-18 11/15/07 X X

TT-MW2-21 01/09/08 X X X X

TT-MW2-22 01/09/08 X X X X Duplicate

TT-MW2-23 01/09/08 X X X X

TT-MW2-24 01/09/08 X X X X MS/MSD

Fourth Quarter 2007: Total Sample Locations: 24 Total Samples Collected: 24

Notes: EPA - United States Environmental Protection Agency. QA / QC - Quality Assurance / Quality Control.

VOCs - Volatile Organic Compounds MS / MSD- Matrix Spike / Matrix Spike Duplicate.



Table 2-2 Sampling Schedule and Analysis Method - First Quarter 2008

Monitoring Well Location Sample Date VOCs (EPA

8260B) Perchlorate (EPA

314.0) Comments and

QA /QC Samples

TT-MW2-7 02/28/08 X X Duplicate

TT-MW2-7D 02/27/08 X X

TT-MW2-8 02/28/08 X X

TT-MW2-9S 02/27/08 X X

TT-MW2-9D 02/27/08 X X

TT-MW2-10 02/26/08 X X

TT-MW2-11 02/26/08 X X

TT-MW2-12 02/26/08 X X

TT-MW2-13 02/26/08 X X

TT-MW2-14 02/25/08 X X

TT-MW2-16 02/25/08 X X

TT-MW2-17S 02/25/08 X X

TT-MW2-17D 02/25/08 X X

TT-MW2-18 02/26/08 X X

TT-MW2-21 02/27/08 X X MS/MSD

TT-MW2-22 02/28/08 X X

TT-MW2-23 02/27/08 X X

TT-MW2-24 02/28/08 X X Duplicate First Quarter 2008: Total Sample Locations: 18

Total Samples Collected: 18 Notes: EPA - United States Environmental Protection Agency.

QA / QC - Quality Assurance / Quality Control. VOCs - Volatile Organic Compounds

MS / MSD- Matrix Spike / Matrix Spike Duplicate.

His

toric

al O

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l Are

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c. F

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al O

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l Are

a J

Fina

l Ass

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l Are

a M

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l Are

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l Are

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1962

RW

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id W

aste

Dis

posa

l Are

a

TT-M

W2-

1

TT-M

W2-

3

TT-M

W2-

5

TT-M

W2-

8TT

-MW

2-7

TT-M

W2-

21

TT-M

W2-

7D

TT-M

W2-

6S

TT-M

W2-

6D

TT-M

W2-

9STT

-MW

2-9D

TT-M

W2-

14

TT-M

W2-

23

TT-M

W2-

22

TT-M

W2-

24

TT-M

W2-

4S

TT-M

W2-

13

TT-M

W2-

10

TT-M

W2-

11

TT-M

W2-

18

TT-M

W2-

12TT-M

W2-

16

TT-M

W2-

17S/

D

Beau

mon

t Site

2

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-2Fo

urth

Qua

rter

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7Sa

mpl

e Lo

catio

ns

01,

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2,00

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from

:Ap

ril 2

007

aeria

l pho

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rea

Bou

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B P

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rea

X:\GIS\Lockheed 22289-0103\Samp_Points Q407.mxd

His

toric

al O

pera

tiona

l Are

a K

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Bay

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Mis

c. F

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ies

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toric

al O

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tiona

l Are

a J

Fina

l Ass

embl

y

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toric

al O

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tiona

l Are

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bage

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l Are

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l Are

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-MW

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TT-M

W2-

21

TT-M

W2-

7D

TT-M

W2-

9STT

-MW

2-9D

TT-M

W2-

18

TT-M

W2-

14

TT-M

W2-

23

TT-M

W2-

22

TT-M

W2-

24

TT-M

W2-

13

TT-M

W2-

10TT

-MW

2-11

TT-M

W2-

12

TT-M

W2-

16

TT-M

W2-

17S/

D

Beau

mon

t Site

2

Figu

re 2

-3Fi

rst Q

uart

er 2

008

Sam

ple

Loca

tions

01,

000

2,00

0 Feet

Ada

pted

from

:Ap

ril 2

007

aeria

l pho

togr

aph.

LEG

END

Not

e:Be

aum

ont S

ite 2

pro

perty

bou

ndar

y fro

mH

illwig

-Goo

drow

sur

vey,

May

200

4.

Gro

undw

ater

Mon

itorin

gW

ell L

ocat

ion

X:\GIS\Lockheed 22289-0103\Samp_Points Q108.mxd

Bea

umon

t Site

1P

rope

rty B

ound

ary

His

toric

al O

pera

tiona

lA

rea

Bou

ndar

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RW

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B P

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char

ge A

rea



2.3 SURFACE WATER SAMPLING

Surface water samples were collected from six (6) locations during a storm event on January 28, 2008.

Samples were tested for VOCs, perchlorate and total and dissolved Title 22 metals. No other surface

water samples were collected during this reporting period. Figure 2-4 presents the storm water locations

sampled.

2.4 ANALYTICAL DATA QA/QC

The groundwater samples collected were analyzed using approved EPA methods. Since the analytical

data were obtained by following EPA-approved method criteria, the data were validated using the EPA-

approved evaluation methods described in the National Functional Guidelines (EPA, 1999 and EPA,

2004).

Quality control parameters used in validating data results include: holding times, field blanks, laboratory

control samples, method blanks, duplicate environmental samples, spiked samples, and surrogate and

spike recovery data.

2.5 HABITAT CONSERVATION

All monitoring activities were performed in accordance with the U.S. Fish and Wildlife Service approved

Habitat Conservation Plan (HCP) [USFWS, 2005] and subsequent clarifications (LMC, 2006a and 2006b)

of the HCP. Groundwater sampling activities were conducted with light duty vehicles and as specified in

the Low Affect HCP do not require biological monitoring.

Parking Area

Water Tanks andPump House

Parking Area

Small Bunker

Building 250Rocket Assembly

Building

Prism

Test Bays

T-Revetment Conditioning Chambers

Historical Operational Area MGarbage Disposal Area

Historical Operational Area LPropellant Burn Area

Historical Operational Area JFinal Assembly

Historical Operational Area KTest Bays & Misc. Facilities

Transformer Pad

Concrete Mount

Centrifuge

Conditioning Chambers

Instrument Building

Reported PropellantBurn Site

Disposal Site

Gilman Springs Road

SW-4 (Dry)

Large Bunker

Liquid WasteDiscahrge Area

TT-MW2-20S/D

TT-MW2-19S/D

TT-MW-21

TT-MW-23

TT-MW-22TT-MW-24

TT-MW2-1

TT-MW2-2

TT-MW2-3

TT-MW2-5

TT-PZ2-1

TT-MW2-8TT-MW2-7

TT-MW2-7D

TT-MW2-4DTT-MW2-4S

TT-MW2-6STT-MW2-6D

TT-MW2-13

TT-MW2-9STT-MW2-9D

TT-MW2-10

TT-MW2-11

TT-MW2-18

TT-MW2-14

TT-MW2-16

TT-MW2-12

TT-MW2-17S/D

SW-7

SW-6

SW-5

SW-3

SW-2

SW-1

Beaumont Site 2

Stormwater Sampling Locations0 1,000 2,000

Feet

Adapted from: April 2007 aerial photograph.

LEGEND

Figure 2-4

Historical Operational Area Boundary

Beaumont Site 2 Property Boundary

Groundwater Monitoring Well

Stormwater Sampling Location

X:\GIS

\Lockheed 22289-0103\Surface W

ater B2.mxd



3.0 GROUNDWATER MONITORING RESULTS The results of the Fourth Quarter 2007 and First Quarter 2008 groundwater monitoring events are

presented in the following subsections. These subsections include tabulated summaries of the

groundwater elevation and water quality data collected groundwater elevation maps, and analyte results

figures.

3.1 GROUNDWATER ELEVATION

Based on the groundwater levels measured during the Fourth Quarter 2007 and First Quarter 2008

monitoring events, depth to groundwater at the Site ranges from about 60 feet bgs in the northern portion

(elevation of 2,078 feet msl, TT-MW2-16) to about 18 feet bgs in the southern portion (elevation of 1,818

feet msl, TT-MW2-8). A tabulated summary of groundwater depths and elevations is presented in Table

3-1. Changes in groundwater elevations from the previous monitoring event for wells monitored for the

Fourth Quarter 2007 and First Quarter 2008 monitoring events are shown on Figures 3-1 and 3-2,

respectively, and hydrographs for individual wells are presented in Appendix C.

In comparison to the Third Quarter 2007 quarterly monitoring event, groundwater levels measured during

the Fourth Quarter 2007 monitoring event increased in QAL/wSTF screened monitoring wells an average

of 0.08 feet and decreased in STF screened monitoring wells an average of 0.10 feet.

In comparison to the Fourth Quarter 2007 quarterly monitoring event, groundwater levels measured

during the First Quarter 2008 monitoring event increased in QAL/wSTF screened monitoring wells an

average of 0.04 feet and increased in STF screened monitoring wells an average of 0.01 feet.

3.2 GROUNDWATER FLOW

Groundwater contour maps for first groundwater and the STF HSU from Fourth Quarter 2007

groundwater levels are presented in Figures 3-3 and 3-4 and from First Quarter 2008 groundwater levels

are presented in Figures 3-5 and 3-6, respectively. Hydrographs for individual wells are presented in

Appendix C.

3.3 GROUNDWATER GRADIENTS

The horizontal groundwater gradients calculated between TT-MW2-16 and TT-MW2-6S from the Fourth

Quarter 2007 and First Quarter 2008 groundwater monitoring events for the QAL/wSTF HSU were 0.029

ft/ft. The horizontal groundwater gradients calculated between TT-MW2-2 and TT-MW2-6D for the

Fourth Quarter 2007 and First Quarter 2008 groundwater monitoring events for the STF HSU was 0.030

ft/ft



Table 3-1 Groundwater Elevation Data - Fourth Quarter 2007 and First Quarter 2008

Fourth Quarter 2007 First Quarter 2008

Well ID HSU Date

Measured

Groundwater Elevation (feet msl)

Groundwater Elevation

Change from Third

Quarter 2007 (feet)

Date Measured

Groundwater Elevation (feet msl)

Groundwater Elevation

Change from Fourth

Quarter 2007 (feet)

Tt-MW2-1 QAL / wSTF 11/08/07 1979.25 -0.24 02/18/08 1978.82 -0.43 Tt-MW2-2 STF 11/08/07 2068.55 0.01 02/18/08 2068.44 -0.11 Tt-MW2-3 QAL / wSTF 11/08/07 2024.61 0.06 02/18/08 2024.47 -0.14 Tt-MW2-4S STF 11/08/07 1936.73 -0.08 02/18/08 1936.66 -0.07 Tt-MW2-4D STF 11/08/07 1930.54 -0.08 02/18/08 1930.59 0.05 Tt-MW2-5 QAL / WwSTF 11/08/07 1872.79 -0.26 02/18/08 1872.89 0.10 Tt-MW2-6S QAL / wSTF 11/08/07 1873.08 -0.17 02/18/08 1873.62 0.54 Tt-MW2-6D STF 11/08/07 1872.25 -0.17 02/18/08 1872.60 0.35 Tt-MW2-7 QAL / wSTF 11/08/07 1819.83 0.00 02/18/08 1820.90 1.07 Tt-MW2-7D STF NA NA NA 02/18/08 1821.82 NA Tt-MW2-8 QAL / wSTF 11/08/07 1818.58 0.12 02/18/08 1819.87 1.29 Tt-MW2-9S QAL / wSTF 11/08/07 1901.43 -0.19 02/18/08 1901.72 0.29 Tt-MW2-9D STF 11/08/07 1897.07 -0.21 02/18/08 1897.44 0.37 Tt-MW2-10 QAL / wSTF 11/08/07 1944.07 0.07 02/18/08 1944.00 -0.07 Tt-MW2-11 QAL / wSTF 11/08/07 1956.41 -0.20 02/18/08 1956.11 -0.30 Tt-MW2-12 STF 11/08/07 1966.36 0.03 02/18/08 1966.26 -0.10 Tt-MW2-13 QAL / wSTF 11/08/07 1983.27 0.02 02/18/08 1983.04 -0.23 Tt-MW2-14 QAL / wSTF 11/08/07 2008.37 -0.03 02/18/08 2008.24 -0.13 Tt-MW2-16 QAL / wSTF 11/08/07 2078.20 0.60 02/18/08 2077.26 -0.94 Tt-MW2-17S QAL / wSTF 11/08/07 2024.82 0.13 02/18/08 2024.47 -0.35 Tt-MW2-17D QAL / wSTF 11/08/07 2025.38 1.06 02/18/08 2024.43 -0.95 Tt-MW2-18 STF 11/08/07 1979.43 -0.18 02/18/08 1979.00 -0.43 Tt-MW2-21 QAL / wSTF NA NA NA 02/18/08 1912.66 NA Tt-MW2-22 QAL / wSTF NA NA NA 02/18/08 1911.00 NA Tt-MW2-23 QAL / wSTF NA NA NA 02/18/08 1912.79 NA Tt-MW2-24 QAL / wSTF NA NA NA 02/18/08 1910.69 NA Tt-MW2-PZ1 QAL / wSTF 11/08/07 1828.45 0.19 02/18/08 1829.35 0.90 Notes: NA - Not applicable msl - Mean sea level QAL / wSTF - Quaternary alluvium / weathered San Timoteo Formation

HSU - Hydrostratigraphic Unit #.## - Denotes an increase in groundwater elevation

STF - San Timoteo Formation - #.## - Denotes a decrease in groundwater elevation

Vertical groundwater gradients at the Site are generally downward. The vertical gradients range from

negative 0.229 to positive 0.022. A summary of calculated horizontal and vertical groundwater gradients

is presented in Table 4-2 and in Appendix F.

Parking Area


Parking Area

Small Bunker


Building

Prism

4 Test Bays


Liquid WasteDischarge Area





Transformer Pad

Concrete Mount

Centrifuge


Instrument Building


Disposal Site

1962 RWQCB PermittedDischarge Area

Large Bunker

TT-MW2-11979.25'

TT-MW2-22068.55'

TT-MW2-32024.61'

TT-MW2-51872.79'

TT-PZ2-11828.45' TT-MW2-8

1818.58'

TT-MW2-71819.83'

TT-MW2-162078.20'

TT-MW2-4D1930.54'

TT-MW2-4S1936.73'

TT-MW2-6S1873.08'

TT-MW2-6D1872.25'

TT-MW2-131983.27'

TT-MW2-9S1901.43'

TT-MW2-9D1897.07'

TT-MW2-111956.41'

TT-MW2-121966.36'

TT-MW2-142008.37'

TT-MW2-17D2025.38'

TT-MW2-101944.07'

TT-MW2-181979.43'

TT-MW2-17S2024.82'

0.6

0.12

0.19

0.07

0.03 -0.2

0.02

0.06

1.06

0.13

0.01

-0.17

-0.17-0.26

-0.21

-0.19

-0.08

-0.08

-0.24

-0.03

-0.18

Beaumont Site 2

Changes inGroundwater Elevations

Fourth Quarter November 2007

0 500 1,000Feet


LEGEND

Note:

Figure 3-1Historical Operational Area Boundary

Mean sea levelmsl -(feet) Compared to Third Quarter 2007groundwater elevations

*


Groundwater Elevation Increase *

Groundwater Elevation Decrease *

0.22

-0.20

Groundwater Monitoring WellLocation with Elevation (feet msl)

RWQCB PermittedDischarge Area

Stable Groundwater Elevation

X:\GIS

\Lockheed 22289-0103\Elev_C

hange_Q407.m

xd

Parking Area


Parking Area

Small Bunker


Building

Prism

4 Test Bays







Transformer Pad

Concrete Mount

Centrifuge


Instrument Building


Disposal Site


Large Bunker

TT-MW2-221911.00'

TT-MW2-101944.00'

TT-MW2-181979.00'

TT-MW2-71820.90'

TT-MW2-11978.82'

TT-MW2-22068.44'

TT-MW2-32024.47'

TT-MW2-6D1872.60'

TT-MW2-51872.89'

TT-PZ2-11829.35' TT-MW2-8

1819.87'

TT-MW2-211912.66'

TT-MW2-241910.69'

TT-MW2-7D1821.82'

TT-MW2-4D1930.59'

TT-MW2-4S1936.66'

TT-MW2-6S1873.62'

TT-MW2-131983.04'

TT-MW2-9S1901.72'

TT-MW2-9D1897.44'

TT-MW2-111956.11'

TT-MW2-121966.26'

TT-MW2-142008.24'

TT-MW2-162077.26'

TT-MW2-17D2024.43'

TT-MW2-231912.79'

TT-MW2-17S2024.47'

0.05

0.54

0.350.10

0.90

1.29

1.07

0.29

0.37

-0.95

-0.07

-0.43

-0.11

-0.14

-0.23

-0.07-0.30

-0.43

-0.10

-0.13

-0.35

-0.94

Beaumont Site 2

Changes inGroundwater Elevations

First Quarter February 2008

0 500 1,000Feet


LEGEND

Note:


Mean sea levelmsl -(feet) Compared to Fourth Quarter 2007groundwater elevations

*

Beaumont Site 2 Property BoundaryGroundwater Elevation Increase *

Groundwater Elevation Decrease *

0.22-0.20


RWQCB PermittedDischarge Area

Data Not Available

X:\GIS

\Lockheed 22289-0103\Elev_C

hange_Q108.m

xd

Parking Area


Parking Area

Small Bunker


Building

Prism

4 Test Bays







Transformer Pad

Concrete Mount

Centrifuge


Instrument Building


Disposal Site


Large Bunker

1960'

2020'

TT-MW2-11979.25'

TT-MW2-51872.79'

TT-PZ2-11828.45'

TT-MW2-81818.58'TT-MW2-7

1819.83'

TT-MW2-162078.20'

TT-MW2-6S1873.08'

TT-MW2-131983.27'

TT-MW2-9S1901.43'

TT-MW2-101944.07'

TT-MW2-111956.41'

TT-MW2-142008.37'

TT-MW2-17S2024.82'

1920'

2000'

2020'

1940'

1900'

1860'

1960'

1880'

1840'

2060'

2040'

1980'

Beaumont Site 2

First Groundwater ContoursFourth Quarter (November) 2007

0 500 1,000Feet


LEGEND

Note:


Beaumont Site 2 property boundary fromHillwig-Goodrow survey, May 2004.

20-foot groundwater contour interval.

Groundwater elevations in feet MSL.



RWQCB Permitted Discharge Area

X:\GIS

\Lockheed 22289-0103\GW

_ELEV

_ALUV

_Q407.m

xd

Groundwater Flow Direction

Groundwater Elevation Contour1860'

Parking Area


Parking Area

Small Bunker


Building

Prism

4 Test Bays







Transformer Pad

Concrete Mount

Centrifuge


Instrument Building


Disposal Site


Large Bunker

TT-MW2-7DNA

TT-MW2-22068.55'

TT-MW2-4D1930.54'

TT-MW2-4S1936.73'

TT-MW2-6D1872.25'

TT-MW2-9D1897.07'

TT-MW2-181979.43'

TT-MW2-121966.36'

1920'

2040'

1960'

2020'

1980'

1900'

1940'

1880'

2000'

2060'

Beaumont Site 2

Groundwater Contours forSan Timoteo Formation

Fourth Quarter (November) 2007

0 350 700Feet


LEGEND

Note:

Figure 3-4

Historical Operational Area BoundaryBeaumont Site 2 property boundary fromHillwig-Goodrow survey, May 2004.20-foot groundwater contour interval.Groundwater elevations in feet MSL.NA - Not available.




X:\GIS


_ELEV

_SAN

TIM_Q

407.mxd



Parking Area


Parking Area

Small Bunker


Building

Prism

4 Test Bays







Transformer Pad

Concrete Mount

Centrifuge


Instrument Building


Disposal Site


Large Bunker

1960'

2020'

TT-MW2-101944.00'

TT-MW2-71820.90'

TT-MW2-11978.82'

TT-MW2-51872.89'

TT-PZ2-11829.35'

TT-MW2-81819.87'

TT-MW2-6S1873.62'

TT-MW2-9S1901.72'

TT-MW2-111956.11'

TT-MW2-142008.24'

TT-MW2-162077.26'

TT-MW2-17S2024.47'

TT-MW2-131983.04'

1920'

2000'

1980'

1900'

1960'

1860'

1880'

2060'

1820'

2020'

2040'

1840'

1940'

TT-MW2-211912.66'

TT-MW2-231912.79'

TT-MW2-221911.00'

TT-MW2-241910.69'

Beaumont Site 2

First Groundwater Contours forFirst Quarter (February) 2008

0 500 1,000Feet


LEGEND

Note:


Beaumont Site 2 property boundary fromHillwig-Goodrow survey, May 2004.20-foot groundwater contour interval.Groundwater elevations in feet MSL.NA - Not available.




X:\GIS


_ELEV

_ALUV

_Q108.m

xd



Parking Area


Parking Area

Small Bunker


Building

Prism

4 Test Bays







Transformer Pad

Concrete Mount

Centrifuge


Instrument Building


Disposal Site


Large Bunker

1820'

TT-MW2-181979.00

TT-MW2-22068.44'

TT-MW2-6D1872.60'

TT-MW2-7D1821.82'

TT-MW2-4D1930.59'

TT-MW2-4S1936.66'

TT-MW2-9D1897.44'

TT-MW2-121966.26'

1920'

1960'

2040'

2020'

1900'

1880'

1940'

1860'

2000'

1840'

1980'

2060'

Beaumont Site 2

Groundwater Contours forSan Timoteo Formation

First Quarter (February) 2008

0 500 1,000Feet


LEGEND

Note:


Beaumont Site 2 property boundary fromHillwig-Goodrow survey, May 2004.20-foot groundwater contour interval.Groundwater elevations in feet MSL.




X:\GIS


_ELEV

_SAN

TIM_Q

108.mxd



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3.4 ANALYTICAL DATA SUMMARY

Groundwater samples collected during the Fourth Quarter 2007 monitoring event were tested for VOCs,

perchlorate, and select wells were sampled for SVOCs, total and dissolved CAM 17 metals. VOCs and

perchlorate are contaminants of potential concern at the Site. Groundwater samples collected during the

First Quarter 2008 monitoring event were tested for VOCs and perchlorate.

Summaries of validated laboratory analytical results for analytes detected above their respective MDLs

during the monitoring events are presented in Tables 3-3 and 3-4. A complete list of the analytes tested

along with validated sample results by analytical method are provided in Appendix G. VOC and

perchlorate sample results above the published MCL (federal or state, whichever is lower) or DWNL are

bolded in Tables 3-3 and 3-4. Laboratory analytical data packages, which include all environmental, field

QC, and laboratory QC results, are provided in Appendix H. A consolidated laboratory data summary

table is presented in Appendix B.

3.4.1 Data Quality Review

The quality control samples were reviewed as described in the Groundwater Sampling and Analysis Plan

(Tetra Tech, 2007). The data for the groundwater sampling activities were contained in nine analytical

data packages (07K249, 07K269, 07K298, 08A073, 08A259, 08B274, 08B286, 08B306, and 08B326).

The results for groundwater samples collected for analytical testing were reviewed using the latest

versions of the National Functional Guidelines for Organic and Inorganic Data Review documents from

the EPA (EPA, 1999 and 2004).

Holding times, field blanks, laboratory control samples, method blanks, duplicate environmental samples,

spiked samples, and surrogate and spike recovery data were reviewed. Within each environmental sample

the sample specific quality control spike recoveries were examined. These data examinations include

comparing statistically calculated control limits to percent recoveries of all spiked analytes and duplicate

spiked analytes. The results are compared to Relative Percent Difference control limits. Surrogate

recoveries were examined for all organic compound analyses and compared to their control limits.

Environmental samples were analyzed by the following methods: Method E314.0 for perchlorate, Method

SW6010B for CAM 17 metals, Methods SW7470A and SW7471A for mercury, Method SW8260B for

VOCs, and Method SW8270C for SVOCs. Unless discussed below, all data results met required criteria,

are of known precision and accuracy, did not require any qualification, and may be used as reported.

Methylene chloride was detected in the field and/or laboratory blanks collected during the Third Quarter

2007 monitoring event. Qualified data results are denoted with a “B” flag. The validity of “B” qualified

data is suspect because the results are considered to have not originated from the native sample. These



results are considered to be due to cross-contamination from field and/or laboratory operations. The levels

of contaminants detected in the field or method blanks will qualify similar levels of the same detected

analytes in environmental samples. These blank detections qualified three methylene chloride

environmental samples. Data so qualified are denoted with a “B” flag, are generally considered not usable

and will not be included in subsequent analysis.

For Method SW8260B, holding time violations qualified 25 percent of the data as estimated. The holding

time violations were minor (less then a few hours) and are not expected to degrade target analyte

concentrations in the samples. Therefore, data comparability with historic data should not be affected by

these holding time violations. The laboratory was contacted, and they are undertaking corrective action to

avoid a recurrence of this error. The data was “J” qualified and are usable for their intended purpose.



Table 3-3 Summary of Detected Validated Organic Analytes - Fourth Quarter 2007 and First Quarter 2008

Sample Location

Sample Date

Carbon Disulfide

µg/L

Chloromethane µg/L

Chloroform µg/L

1, 1-Dichloroethane

µg/L

1, 2-Dichloroethane

µg/L

1, 1-Dichloroethene

µg/L

Methylene Chloride

µg/L

Toluene µg/L

1, 1, 2 - Trichloroethane

µg/L

Trichloroethene µg/L

Vinyl Chloride

µg/L

TT-MW2-1 11/15/2007 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

TT-MW2-3 11/20/2007 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 3.7 <0.2

TT-MW2-4S 11/16/2007 <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe 0.74 Bjekq <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe

TT-MW2-5 11/20/2007 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

TT-MW2-6D 11/19/2007 0.74 Jq <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

TT-MW2-6S 11/19/2007 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

11/19/2007 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 0.6 BJkq <0.2 <0.2 <0.2 <0.2 TT-MW2-7

2/28/2008 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

1/9/2008 0.21 Jq 0.24 Jq <0.2 <0.2 <0.2 <0.2 <0.5 0.26 Jq <0.2 <0.2 <0.2 TT-MW2-7D

2/27/2008 1.2 0.29 Jq <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

11/19/2007 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2 TT-MW2-8

2/28/2008 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

11/16/2007 0.22 Jeq <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.5 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe TT-MW2-9D

2/27/2008 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

11/16/2007 <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.5 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe TT-MW2-9S

2/27/2008 0.35 Jq <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

11/15/2007 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2 TT-MW2-10

2/26/2008 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

11/15/2007 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 7.3 <0.2 TT-MW2-11

2/26/2008 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 7.6 <0.2

11/16/2007 0.29 Jeq <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.5 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe TT-MW2-12

2/26/2008 0.28 Jq <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

11/15/2007 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2 TT-MW2-13

2/26/2008 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

11/16/2007 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 83 <0.2 <0.2 <0.2 <0.2 TT-MW2-14

2/25/2008 <2 <2 <2 <2 <2 <2 4.6 <2 <2 <0.2 <0.2

11/15/2007 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2 TT-MW2-16

2/25/2008 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

11/16/2007 <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.5 UJe <0.2 UJe <0.2 UJe 0.55 Jeq <0.2 UJe TT-MW2-17D

2/25/2008 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 0.46 Jq <0.2

11/16/2007 0.21 Jeq <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.5 UJe <0.2 UJe <0.2 UJe <0.2 UJe <0.2 UJe TT-MW2-17S

2/25/2008 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

11/15/2007 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2 TT-MW2-18

2/26/2008 <0.2 <0.2 0.59 Jq <0.2 <0.2 <0.2 <0.5 <0.2 <0.2 <0.2 <0.2

1/9/2008 0.54 Jq 0.56 Jq <0.2 <0.2 <0.2 <0.2 <0.5 1.2 <0.2 <0.2 <0.2 TT-MW2-21

2/27/2008 0.55 Jq 0.41 Jq <0.2 <0.2 <0.2 <0.2 0.76 Jq 0.21 Jq <0.2 <0.2 <0.2

1/9/2008 0.66 Jq 0.52 Jq 1 0.48 Jq 2.1 5 170 Jr 0.24 Jq <0.2 47 <0.2 TT-MW2-22

2/28/2008 <0.2 0.65 Jq 0.81 Jq 0.45 Jq 2 4.8 200 Jr <0.2 <0.2 50 <0.2

1/9/2008 0.44 Jq <0.2 <0.2 <0.2 <0.2 <0.2 <0.5 1.4 <0.2 <0.2 <0.2 TT-MW2-23

2/27/2008 3 0.97 Jq <0.2 <0.2 <0.2 <0.2 <0.5 1.2 <0.2 <0.2 <0.2

1/9/2008 <0.2 0.27 Jq 2.8 0.63 Jq 0.55 Jq 1.1 <0.5 0.27 Jq 0.45 Jq 58 Jr <0.2 TT-MW2-24

2/28/2008 <0.2 0.23 Jq 3.2 0.77 Jq 0.75 Jq 1.6 0.75 BJkq <0.2 0.53 Jq 86 Jr 0.22 Jq

Method Detection Limit 5.0 0.20 0.20 0.20 0.2 0.20 0.50 0.20 0.20 0.20 0.20

MCL (unless noted) / DWNL - 160 (1) - 5.0 0.5 6.0 5 150 5 5 0.3 (1)

Notes: Only analytes positively detected in samples are presented in this table. For a complete list of constituents analyzed, refer to the laboratory data package.

MCL - California Department of Health Maximum Contaminant Level. " - " MCL/DWNL not established.

DWNL - California Department of Health Services drinking water notification level. < # - Method detection limit concentration is shown.

(1) - DWNL µg/L - Micrograms per liter

B - The sample result was less than 5 times blank contamination. Cross contamination is suspected. Bold - Maximum Contaminant Level exceeded.

J - The analyte was positively identified, but the concentration is an estimated value. e - A holding time violation occurred.

U - The analyte was analyzed for , but was not detected above the MDL. k - The analyte was found in the field blank.

q - The analyte detection was below the Practical Quantitation Limit (PQL). r - The result is above the instrument's calibration range.



Table 3-4 Summary of Detected Validated Inorganic Analytes – Fourth Quarter 2007 and First Quarter 2008

Sample Location

Sample Date

Filter Status

Perchlorate -µg/L

Arsenic -mg/L

Barium -mg/L

Copper -mg/L

Lead -mg/L

Mercury -mg/L

Molybdenum -mg/L

Vanadium -mg/L

Zinc -mg/L

TT-MW2-1 11/15/2007 Unfiltered 8950 NA NA NA NA NA NA NA NA


TT-MW2-4S 11/15/2007 Unfiltered <0.5 NA NA NA NA NA NA NA NA


TT-MW2-6D 11/15/2007 Unfiltered <0.5 NA NA NA NA NA NA NA NA

TT-MW2-6S 11/15/2007 Unfiltered 262 NA NA NA NA NA NA NA NA

11/15/2007 Unfiltered 469 NA NA NA NA NA NA NA NA TT-MW2-7

2/28/2008 Unfiltered 494 NA NA NA NA NA NA NA NA

1/9/2008 Unfiltered <0.5 0.0207 0.00709 Jq 0.00535 Jq 0.00764 Jq <0.0001 0.0186 Jq 0.0341 0.0121

1/9/2008 Filtered NA 0.0223 0.00278 Jq 0.0158 0.00613 Jq <0.0001 0.0189 Jq 0.0276 <0.005 TT-MW2-7D

2/27/2008 Unfiltered <0.5 NA NA NA NA NA NA NA NA



11/16/2007 Unfiltered <0.5 NA NA NA NA NA NA NA NA TT-MW2-9D


11/16/2007 Unfiltered 203 NA NA NA NA NA NA NA NA TT-MW2-9S


11/15/2007 Unfiltered <0.5 NA NA NA NA NA NA NA NA TT-MW2-10




11/16/2007 Unfiltered <0.5 NA NA NA NA NA NA NA NA TT-MW2-12

2/26/2008 Unfiltered 1.94 Jq NA NA NA NA NA NA NA NA





11/15/2007 Unfiltered 2.72 NA NA NA NA NA NA NA NA TT-MW2-16

2/25/2008 Unfiltered 4.23 NA NA NA NA NA NA NA NA

11/16/2007 Unfiltered 45100 NA NA NA NA NA NA NA NA TT-MW2-17D 2/25/2008 Unfiltered 40300 NA NA NA NA NA NA NA NA

11/16/2007 Unfiltered 2710 NA NA NA NA NA NA NA NA TT-MW2-17S 2/25/2008 Unfiltered 2270 NA NA NA NA NA NA NA NA



1/9/2008 Unfiltered <0.5 0.0129 0.00409 Jq <0.005 0.00554 Jq <0.0001 0.0224 Jq <0.005 0.0735

1/9/2008 Filtered NA 0.0134 0.00334 Jq <0.005 0.00494 Jq <0.0001 0.022 Jq <0.005 <0.005 TT-MW2-21


1/9/2008 Unfiltered <0.5 0.0097 0.01320 <0.005 0.00551 Jq 0.000103 Jq 0.0286 Jq <0.005 0.0195

1/9/2008 Filtered NA 0.00965 Jq 0.01230 <0.005 0.0054 Jq <0.0001 0.027 Jq 0.00505 Jq 0.00812 Jq TT-MW2-22


1/9/2008 Unfiltered <0.5 0.00547 Jq 0.18800 <0.005 0.0224 <0.0001 0.0281 Jq 0.0284 0.0499

1/9/2008 Filtered NA <0.0050 0.01310 <0.005 0.00633 Jq <0.0001 0.0271 Jq 0.00584 Jq <0.005 TT-MW2-23


1/9/2008 Unfiltered 10900 <0.0050 0.02320 0.00841 Jq 0.00747 Jq <0.0001 0.0306 Jq <0.005 0.0115

1/9/2008 Filtered NA 0.00593 Jq 0.02290 0.00788 Jq 0.00774 Jq <0.0001 0.0296 Jq <0.005 0.00839 Jq TT-MW2-24


Method Detection Limit 0.5 0.0050 0.002 0.005 0.003 0.0001 0.010 0.005 0.005

MCL (unless noted) / DWNL 6 0.01 1 1.3 0.015 0.002 - 0.05 (1) -

Notes: Only analytes positively detected in samples are presented in this table. For a complete list of constituents analyzed, refer to the laboratory data package.

B - The sample result was less than 5 times blank contamination. Cross contamination is suspected. µg/L - Micrograms per liter

J - The analyte was positively identified, but the concentration is an estimated value. e - A holding time violation occurred.

MCL - California Department of Health Maximum Contaminant Level. k - The analyte was found in the field blank. DWNL - California Department of Health Services drinking water notification level. q - The analyte detection was below the Practical Quantitation Limit (PQL).

(1) - DWNL Bold - Maximum Contaminant Level exceeded.

" - " MCL/DWNL not established. < # - Method detection limit concentration is shown.

NA - Not analyzed. mg/L - Milligrams per liter



3.5 CHEMICALS OF POTENTIAL CONCERN

COPCs are evaluated annually as part of the summer monitoring event. Because a significant number of

new wells have been installed and are being monitored quarterly for their first year after installation,

COPCs will be evaluated at this time as well. The results were screened against the MCLs or DWNLs (if

an MCL is not established). The analytes were organized and evaluated in two (2) groups, organic and

inorganic analytes, and divided into primary and secondary COPC. Laboratory analytical results from the

Fourth Quarter 2007 and First Quarter 2008 monitoring events are presented in the following two (2)

subsections. Table 3-5 presents a summary of validated organic and inorganic analytes detected during

the monitoring events. Data which are B qualified because of association with either laboratory or field

contamination are not included in the COPC evaluation. Trend analysis was not performed, this task will

be performed annually as part of the summer monitoring event.

3.5.1 Organic Analytes

Three organic analytes (TCE, 1,2-DCA and methylene chloride) were detected above a published MCL or

DWNL. Table 3-3 presents a summary of validated organic analyte concentrations reported in

groundwater samples collected during the Fourth Quarter 2007 and First Quarter 2008 groundwater

monitoring events

1,2-DCA was reported in groundwater samples collected from two monitoring wells in Liquid Waste

Discharge Area sampled during the Fourth Quarter 2007 and First Quarter 2008 monitoring events at

concentrations ranging from 0.55 to 2.1 µg/L. The MCL for 1,2-DCA is 0.5 µg/L.

Methylene chloride was reported in groundwater samples collected from two monitoring wells in two

locations sampled during the Fourth Quarter 2007 monitoring event at concentrations ranging from 83 to

170 µg/L. During the First Quarter 2008 monitoring event, methylene chloride was reported in

groundwater samples collected from three monitoring wells in two locations sampled at concentrations

ranging from 0.76 to 200 µg/L. The MCL for methylene chloride is 5 µg/L.

TCE was reported in groundwater samples collected from five monitoring wells in three locations

sampled during the Fourth Quarter 2007 monitoring event at concentrations ranging from 0.55 to 58 µg/L.

During the First Quarter 2008 monitoring event, TCE was reported in groundwater samples collected

from four monitoring wells in three locations sampled at concentrations ranging from 0.46 to 86 µg/L.

The TCE MCL is 5 µg/L. TCE has not been reported in any of the other groundwater samples collected.

Figures 3-7 and 3-8 present groundwater sampling analytical results for TCE concentrations reported for

the Fourth Quarter 2007 and First Quarter 2008 monitoring events, respectively. Time-series graphs of

TCE and perchlorate are provided in Appendix I.



Other organic analytes detected at low levels and below their respective MCLs or DWNLs during the

Fourth Quarter 2007 and First Quarter 2008 groundwater monitoring events were carbon disulfide,

chloromethane, chloroform, 1,1-DCA, 1,1-DCE, toluene, 1,1,2-trichloroethane, and vinyl chloride. None

of these compounds exceeded their MCL or DWNL, and generally they were not detected consistently

from monitoring event to event.



Table 3-5 Summary Statistics of Validated Organic and Inorganic Analytes Detected Fourth Quarter 2007 and First Quarter 2008

Fourth Quarter 2007

Compounds Detected

Total Number of

Samples Analyzed (1)

Total Number of Detections

(1)

Number of Detections Exceeding MCL or

DWNL (1)

Corresponding MCL (unless

noted) / DWNL

Minimum Concentration

Detected

Maximum Concentration

Detected Organic Analytes:

Carbon Disulfide 24 8 0 160 µg/L (3) 0.21 µg/L 0.74 µg/L Chloromethane 24 4 - - µg/L 0.24 µg/L 0.56 µg/L

Chloroform 24 2 - - µg/L 1.0 µg/L 2.8 µg/L 1, 1-Dichloroethane 24 2 0 5 µg/L 0.48 µg/L 0.63 µg/L 1, 2-Dichloroethane 24 2 2 0.5 µg/L 0.55 µg/L 2.1 µg/L 1, 1-Dichloroethene 24 2 0 6 µg/L 1.1 µg/L 5.0 µg/L Methylene Chloride 24 2 2 5 µg/L 83 µg/L 170 µg/L

Toluene 24 5 0 150 µg/L 0.24 µg/L 1.2 µg/L 1, 1, 2-Trichloroethane 24 1 0 5 µg/L 0.45 µg/L 0.45 µg/L

Trichloroethene 24 5 3 5 µg/L 0.55 µg/L 58 µg/L Inorganic Analytes (2):

Perchlorate 24 15 14 6 µg/L 2.72 µg/L 109000 µg/L Arsenic 10 8 0 0.05 mg/L 0.00547 mg/L 0.0223 mg/L Barium 10 10 0 1 mg/L 0.00278 mg/L 0.188 mg/L Copper 10 4 0 1.3 mg/L 0.00535 mg/L 0.0158 mg/L Lead 10 10 1 0.015 mg/L 0.00494 mg/L 0.0224 mg/L

Mercury 10 1 1 0.002 mg/L 0.103 mg/L 0.103 mg/L Molybdenum 10 10 - - mg/L 0.0186 mg/L 0.0306 mg/L

Vanadium 10 5 0 0.05 mg/L (3) 0.00505 mg/L 0.0341 mg/L Zinc 10 7 - - mg/L 0.00812 mg/L 0.0735 mg/L

First Quarter 2008

Compounds Detected

Total Number of

Samples Analyzed (1)

Total Number of Detections

(1)

Number of Detections Exceeding MCL or

DWNL (1)

Corresponding MCL (unless

noted) / DWNL

Minimum Concentration

Detected

Maximum Concentration

Detected Organic Analytes:

Carbon Disulfide 18 5 0 160 µg/L (3) 0.28 µg/L 3 µg/L Chloromethane 18 5 - - µg/L 0.23 µg/L 0.97 µg/L

Chloroform 18 2 - - µg/L 0.81 µg/L 3.2 µg/L 1, 1-Dichloroethane 18 2 0 5 µg/L 0.45 µg/L 0.77 µg/L 1, 2-Dichloroethane 18 2 1 0.5 µg/L 0.75 µg/L 2.0 µg/L 1, 1-Dichloroethene 18 2 0 6 µg/L 1.6 µg/L 4.8 µg/L Methylene Chloride 18 3 1 5 µg/L 0.76 µg/L 200 µg/L

Toluene 18 2 0 150 µg/L 0.21 µg/L 1.2 µg/L 1, 1, 2-Trichloroethane 18 1 0 5 µg/L 0.53 µg/L 0.53 µg/L

Trichloroethene 18 4 3 5 µg/L 0.46 µg/L 86 µg/L Vinyl Chloride 18 1 0 0.5 µg/L 0.22 µg/L 0.22 µg/L

Inorganic Analytes (2): Perchlorate 18 12 10 6 µg/L 1.93 µg/L Jq 41200 µg/L

Notes: Only analytes positively detected in groundwater or surface water samples are presented in this table. For a complete list of constituents analyzed, refer to the laboratory data package.

(1) - Number of detections exclude sample duplicates, trip blanks, and equipment blanks. (2) - Unfiltered results are utilized for Title 22 metals. (3) - DWNL.

MCL - California Department of Health Maximum Contaminant Level. DWNL - California Department of Health Services state drinking water notification level.

µg/L - Micrograms per liter. mg/L - Milligrams per liter.



3.5.2 Organic COPCs

Based on the analysis above and the concentrations detected during previous groundwater monitoring

events, no organic primary COPCs have been identified at the Site. Based on the limited and relatively

low TCE, methylene chloride, and RDX concentrations reported in groundwater samples collected from

the Site, they are regarded as secondary COPCs. Their distribution and concentration in groundwater will

continue to be monitored and the results evaluated.

3.5.3 Inorganic Analytes

Three inorganic analytes (perchlorate, arsenic, and lead) were detected in groundwater above a published

MCL. Table 3-4 presents a summary of validated inorganic analyte concentrations reported in

groundwater samples collected during the Fourth Quarter 2007 and First Quarter 2008 groundwater

monitoring events.

Perchlorate was reported in groundwater samples collected from 12 of 24 locations sampled during the

Fourth Quarter 2007 groundwater monitoring event and 12 of 18 locations sampled during the First

Quarter 2008 monitoring event, at concentrations up to 109,000 and 136,000 µg/L, respectively. The

MCL for perchlorate is 6 µg/L.

Figure 3-7 presents groundwater sampling analytical results for perchlorate concentrations reported for

the Fourth Quarter 2007 monitoring event. Figure 3-8 presents groundwater sampling analytical results

for perchlorate concentrations reported for the First Quarter 2008 monitoring event. Time-series graphs of

perchlorate are provided in Appendix I.

Arsenic was detected in five groundwater monitoring wells during the Fourth Quarter 2007 groundwater

monitoring event. The concentrations ranged from 0.00547 to 0.0223 mg/L. Two of the wells had

concentration that exceeded the 0.01 mg/L MCL for arsenic.

Lead was detected in five groundwater monitoring wells during the Fourth Quarter 2007 groundwater

monitoring event. The concentration ranged from 0.00494 to 0.0224 mg/L with one well, TT-MW2-23,

exceeding the MCL of 0.015 mg/L.

Parking Area

Parking Area

Small Bunker

Prism

Test Bays


2200'

2100

'220

0'






BuildingWater Tanks and

Pump House

Transformer Pad

Concrete Mount

Centrifuge


Instrument Building

Reported Propellant Burn Site

Disposal Site


Large Bunker

Liquid WasteDischage Area

W 2-1

W 2-3

W 2-2W 2-5

MW 2-2

MW 2-4

MW 2-5

MW 2-6

2200'

2300

'

2000

'

2100

'

1900'

1900'

2200'

2400'

2400

'

2300'

2300'

1800'

2400'

2000'

2500'

2200'

2200'

2200'

2100'

2300'

2200'

2200'

2300'

2200'

2400

'

2200'

2300'

2400'

2200'

2400'

2400'

1800'

2200'

2000'

2400'

2200'

2200'

2400'

2300'

2300'

2400

'

1800' 2200'

2000'

2200'

2200'

1800'

2400'

2400'

2200'

2200

'

2400'

2100'

2500'2400'2100'

1800'

TT-MW2-3Perchlorate 7220TCE 3.7

TT-MW2-22Perchlorate <0.5TCE 47

TT-MW2-8Perchlorate 312 TCE <0.2 TT-MW2-7

Perchlorate 469 TCE <0.2

TT-MW2-1Perchlorate 8950 TCE <0.2

TT-MW2-6SPerchlorate 262 TCE <0.2


TT-MW2-14Perchlorate 49500 TCE <2

TT-MW2-24Perchlorate 109000 TCE 58 Jr

TT-MW2-16Perchlorate 2.72 TCE <0.2

TT-MW2-21Perchlorate <0.5TCE <0.2

TT-MW2-7DPerchlorate <0.5TCE <0.2


TT-MW2-9SPerchlorate 203 TCE <0.2 UJe


TT-MW2-9DPerchlorate <0.5TCE <0.2 UJe

TT-MW2-11Perchlorate 469 TCE 7.3


TT-MW2-18Perchlorate 15400TCE <0.2

TT-MW2-17DPerchlorate 45100TCE 0.55 Jeq


TT-MW2-17SPerchlorate 2710TCE <0.2 UJe

TT-MW2-4SPerchlorate <0.5TCE <0.2 UJe

TT-MW2-12Perchlorate <0.5TCE <0.2 UJe

TT-MW2-2

TT-MW2-4D

TT-PZ2-1

Beaumont Site 2

Perchlorate and TCEConcentrations -Fourth Quarter

(November) 2007 (µg/L)

0 500 1,000Feet


Topographic Contour (100-foot interval)2200'

Note: Beaumont Site 2 property boundary fromHillwig-Goodrow survey, May 2004.

Figure 3-7

Depths are below ground surface.

Bold indicates corresponding MCL exceeded.

Concentrations shown are in microgramsper liter (µg/L)

MCL - Maximum Contaminant Level


X:\GIS

\Lockheed 22289-0103\Perchlorate-TC

E Q

407.mxd

LEGEND


Groundwater Monitoring Well Location

Destroyed Monitoring Well Location

Destroyed Production Well Location


Well Not Sampled

Reported Production Well Location

Parking Area

Parking Area

Small Bunker

Prism

Test Bays


2200'

2100

'220

0'






BuildingWater Tanks and

Pump House

Transformer Pad

Concrete Mount

Centrifuge


Instrument Building

Reported Propellant Burn Site

Disposal Site


Large Bunker

Liquid WasteDischage Area

W 2-1

W 2-3

W 2-2W 2-5

MW 2-2

MW 2-4

MW 2-5

MW 2-6

2200'

2300

'

2000

'

2000'

2100

'

1900'

1900'

2200'250

0'

2400'

2400

'

2300'

2300'

1800'

2400'

2000'

2500'

2200'

2200'

2200'

2100'

2300'

2200'

2200'

2300'

2200'

2400

'

2200'

2300'

2400'

2200'

2400'

2400'

1800'

2200'

2000'

2400'

2200'

2200'

2400'

2300'

2300'

2400

'

1800' 2200'

2000'

2200'

2200'

2200'

1800'

2400'

2400'

2200'

2200

'

2400'

2100'

2500'2400'2100'

1800'

TT-MW2-11Perchlorate 314TCE 7.6

TT-MW2-22Perchlorate <0.5TCE 50



TT-MW2-9SPerchlorate 469TCE <0.2

TT-MW2-24Perchlorate 136000TCE 86 Jr

TT-MW2-16Perchlorate 4.23TCE <0.2



TT-MW2-17SPerchlorate 2270TCE <0.2






TT-MW2-17DPerchlorate 40300TCE 0.46 Jq


TT-MW2-12Perchlorate 1.94 JqTCE <0.2

TT-MW2-1

TT-MW2-2

TT-MW2-5

TT-MW2-4DTT-MW2-4S

TT-MW2-6S

TT-MW2-6D

TT-MW2-3

TT-PZ2-1

Beaumont Site 2

Perchlorate and TCEConcentrations -First Quarter

(February) 2008 (µg/L)

0 500 1,000Feet


Note:Beaumont Site 2 property boundary fromHillwig-Goodrow survey, May 2004.

Figure 3-8

Depths are below ground surface.Bold indicates corresponding MCL exceeded.Concentrations shown are in microgramsper liter (µg/L)

MCL - Maximum Contaminant Level

X:\GIS

\Lockheed 22289-0103\Perchlorate-TC

E Q

108.mxd

LEGEND


Groundwater Monitoring Well Location

Destroyed Monitoring Well Location

Topographic Contour (100-foot interval)2200'

Destroyed Production Well Location


RWQCB Permitted Discharge AreaWell Not Sampled

Reported Production Well Location



3.5.4 Inorganic COPCs

Based on the analysis above and the concentrations detected during previous groundwater monitoring

events, perchlorate is the only inorganic primary COPC identified at the Site. No secondary COPCs were

identified. Metals will continue to be evaluated on an annual basis and as additional monitoring points are

added to the network.

3.6 SURFACE WATER SAMPLING RESULTS

Surface water samples were collected from six locations during a storm event on January 28, 2008. One

organic analyte (acetone) was detected at a concentration of 7.2 µg/L. Acetone does not have a published

MCL or DWNL. Seven inorganic analytes (perchlorate, arsenic, barium, beryllium, cadmium, lead, and

vanadium) were detected above a published MCL. Table 3-6 presents a summary of validated organic and

inorganic analyte concentrations reported in surface water samples collected during the First Quarter 2008

groundwater monitoring event.

Perchlorate was detected in one sample (SW-02) located in Area K downgradient of the Prism at a

concentration of 38.3 µg/L. The MCL for perchlorate is 6 µg/L.

Lead was detected in all six of the surface water samples; five of the six had a concentration that

exceeded the MCL of 0.015 mg/L. The concentration ranged from 0.0065 to 0.0725 mg/L. Vanadium was

detected in all six of the surface water samples; two of the six had a concentration that exceeded the

DWNL of 0.05 mg/L. The concentration ranged from 0.0113 to 0.21 mg/L. Arsenic, barium, beryllium,

and cadmium, were detected above the MCLs in one sample (SW-07).

3.7 HABITAT CONSERVATION

Consistent with the U.S. Fish and Wildlife Service (USFWS) approved HCP (USFWS, 2005) and

subsequent clarifications (LMC, 2006a and 2006b) of the HCP describing environmental activities

proposed at the Site, all field activities were performed under the supervision of a Section 10A permitted

or sub-permitted biologist who monitored each work location. As a result, no impact to SKR occurred

during the performance of the field activities related to the Fourth Quarter 2007 and First Quarter 2008

monitoring events.

TETR

A T

ECH

, IN

C.

M

AR

CH

200

9

Sem

iann

ual G

roun

dwat

er M

onito

ring

Rep

ort

3-21

Fo

urth

Qua

rter

200

7 an

d Fi

rst Q

uart

er 2

008

Beau

mon

t Site

2

Tab

le 3

-6 S

umm

ary

of D

etec

ted

Val

idat

ed O

rgan

ic a

nd In

orga

nic

Ana

lyte

s –Su

rfac

e W

ater

Fir

st Q

uart

er 2

008

Sam

ple

Nam

e Sa

mpl

e D

ate

Filte

r St

atus

A

ceto

ne

-ug/

L

Perc

hlor

ate

-ug/

L

Ars

enic

-m

g/L

B

ariu

m

-mg/

L

Ber

ylliu

m

-mg/

L

Cad

miu

m

-mg/

L

Cob

alt -

mg/

L

Chr

omiu

m

-mg/

L

Cop

per

-mg/

L

Lea

d -

mg/

L

Nic

kel -

mg/

L

Van

adiu

m

-mg/

L

Zin

c -

mg/

L

SW-0

1 1/

28/2

008

Unf

ilter

ed

<5

<0.5

<0

.005

0.

592

0.00

19 Jq

<0

.002

0.

0137

<0

.005

0.

0151

0.

0229

0.

0127

Jq

0.05

21

0.03

55

SW-0

2 1/

28/2

008

Unf

ilter

ed

<5

38.3

<0

.005

0.

0828

<0

.001

<0

.002

<0

.005

<0

.005

<0

.005

0.

0065

Jq

<0.0

1 0.

0113

<0

.005

SW

-03

1/28

/200

8 U

nfilt

ered

<5

<0

.5

<0.0

05

0.66

6 0.

0015

6 Jq

<0

.002

0.

0096

7 Jq

<0

.005

0.

0141

0.

0188

<0

.01

0.04

42

0.02

28

SW-0

5 1/

28/2

008

Unf

ilter

ed

<5

<0.5

<0

.005

0.

658

0.00

141

Jq

<0.0

02

0.00

804

Jq

<0.0

05

0.01

24

0.01

72

<0.0

1 0.

0397

0.

0207

SW

-06

1/28

/200

8 U

nfilt

ered

<5

<0

.5

<0.0

05

0.66

9 0.

0017

Jq

<0.0

02

0.01

06

<0.0

05

0.01

39

0.02

51

<0.0

1 0.

0456

0.

0363

SW

-07

1/28

/200

8 U

nfilt

ered

7.

2 Jq

<0

.5

0.03

09

1.99

0.

0062

Jq

0.00

695

Jq

0.03

82

0.01

1 0.

0751

0.

0725

0.

0326

0.

21

0.13

1 M

etho

d D

etec

tion

Lim

it

5 0.

5 0.

0050

0.

002

0.00

1 0.

002

0.00

5 0.

005

0.00

5 0.

003

0.01

0.

005

0.00

5 M

CL

(unl

ess n

oted

) / D

WN

L

-

6 0.

01

1 0.

004

0.00

5 -

0.

05

1.3

0.01

5 0.

1 0.

05 (1

) -

N

otes

: O

nly

anal

ytes

pos

itive

ly d

etec

ted

in sa

mpl

es a

re p

rese

nted

in th

is ta

ble.

For

a c

ompl

ete

list o

f con

stitu

ents

ana

lyze

d, re

fer t

o th

e la

bora

tory

dat

a pa

ckag

e.

MC

L -

Cal

iforn

ia D

epar

tmen

t of H

ealth

Max

imum

Con

tam

inan

t Lev

el.

< #

- M

etho

d de

tect

ion

limit

conc

entra

tion

is sh

own.

D

WN

L -

Cal

iforn

ia D

epar

tmen

t of H

ealth

serv

ices

drin

king

wat

er n

otifi

catio

n le

vel.

µg/L

- M

icro

gram

s per

lite

r (1

) -

DW

NL

mg/

L -

Mill

igra

ms p

er li

ter

"

- "

MC

L/D

WN

L no

t est

ablis

hed.

J -

Th

e an

alyt

e w

as p

ositi

vely

iden

tifie

d, b

ut th

e co

ncen

tratio

n is

an

estim

ated

val

ue.

Bol

d -

Max

imum

Con

tam

inan

t Lev

el e

xcee

ded.

q

- Th

e an

alyt

e de

tect

ion

was

bel

ow th

e Pr

actic

al Q

uant

itatio

n Li

mit

(PQ

L).



4.0 SUMMARY AND CONCLUSIONS These subsections summarize the results of the Fourth Quarter 2007 and First Quarter 2008 groundwater

monitoring events. During the Fourth Quarter 2007 monitoring event 21 monitoring well locations and

one piezometer were measured for groundwater levels and 24 monitoring wells were sampled for

groundwater quality. During the First Quarter 2008 monitoring event 26 monitoring well locations and

one piezometer were measured for groundwater levels and 18 monitoring wells were sampled for

groundwater quality. Additionally surface water samples were collected from six locations during a storm

event.

4.1 GROUNDWATER ELEVATION AND FLOW

During the Fourth Quarter 2007 and First Quarter 2008 monitoring events, depth to water at the Site

ranged from approximately 60 feet bgs (elevation of 2,078 feet msl) upgradient in the northern most well

to 18 feet bgs (elevation of 1,818 feet msl) downgradient in the southern most well.

Based on the measured groundwater elevations, the current CSM, and the southward sloping topography

at the Site, groundwater flow in the QAL/wSTF and STF HSUs appears to be southerly and generally

follow the topography of Laborde Canyon. Groundwater flow will be refined as additional data are

acquired.

Generally, groundwater elevation at the Site is relatively stable demonstrating a limited but delayed

seasonal rise and fall. There is insufficient data to discuss any long term trends in groundwater elevation

at this time.

4.1.1 Groundwater Gradients

Horizontal groundwater gradients across the Site are relatively constant. The horizontal groundwater

gradients calculated between TT-MW2-16 and TT-MW2-6S from the Fourth Quarter 2007 and First

Quarter 2008 groundwater monitoring events for the QAL/wSTF HSU were 0.029 ft/ft. The horizontal

groundwater gradients calculated between TT-MW2-2 and TT-MW2-6D for the Fourth Quarter 2007 and

First Quarter 2008 groundwater monitoring events for the STF HSU was 0.030 ft/ft.

Vertical groundwater gradients are calculated from individual clusters of wells. Well clusters are used to

measure the differences in static water level at different depths within the aquifer. The vertical gradient is

a comparison of static water level between wells at different depths within the aquifer and is an indication

of the vertical flow of groundwater (downward – negative gradient, upward – positive gradient). Vertical

groundwater gradients at the Site are generally downward. The vertical gradients range from negative



0.229 to positive 0.022. A summary of calculated horizontal and vertical groundwater gradients is

presented in Table 3-2 and in Appendix F.

4.2 WATER QUALITY MONITORING

Groundwater samples collected during the Fourth Quarter 2007 and First Quarter 2008 monitoring events

were tested for VOCs and perchlorate. Select wells were tested for total and dissolved metals and SVOCs.

Based on the historical operations at the Site and groundwater monitoring results, perchlorate was

identified as a primary COPC and TCE; methylene chloride and RDX were identified as secondary

COPCs.

Perchlorate was reported in groundwater samples collected from 12 of 24 and 12 of 18 locations sampled

during the Fourth Quarter 2007 and First Quarter 2008 monitoring events, respectively. During the Fourth

Quarter 2007 monitoring event, perchlorate was reported in groundwater samples collected ranging from

2.72 to 109,000 µg/L, and the perchlorate MCL of 6 µg/L was exceeded in 14 of the 24 groundwater

samples collected. During the First Quarter 2008 monitoring event, perchlorate was reported in

groundwater samples collected ranging from 1.94 to 136,000 µg/L and the perchlorate MCL was

exceeded in 10 of the 18 groundwater samples collected. The highest concentrations of perchlorate were

detected in groundwater samples collected from monitoring wells TT-MW2-24, located in the Liquid

Waste Discharge Area and TT-MW2-14, located in Area K.

Perchlorate has been detected in the groundwater in Area J below the MCL (6.0 µg/L). In area K,

perchlorate in the groundwater has been detected as high as 79,300 µg/L (TT-MW2-17D, Second Quarter

2008). Area L, downgradient of both Areas J and K has had concentrations as high as 19,700 µg/L

detected in the groundwater (TT-MW2-18, Fourth Quarter 2006). There are currently no indications that a

source of perchlorate is present in Area L. The perchlorate detected in the groundwater in this Area

appears to have originated in Area K. Concentrations as high as 469 µg/L (TT-MW2-11, Fourth Quarter

2007) have been detected in the groundwater in Area M. The highest concentrations of perchlorate,

136,000 µg/L (TT-MW2-24, First Quarter 2008), have been detected in the Liquid Waste Discharge Area

which is downgradient of the operational areas (areas J, K, L, and M). Concentrations as high as 1070

µg/L (TT-MW2-5, Fourth Quarter 2006) have been detected in the groundwater in the lower section of

Laborde Canyon, downgradient of both the Operational Areas and the Liquid Waste Discharge Area. The

available data suggests the waste discharge disposal area may be the source of the perchlorate found in

the groundwater in this downgradient area.

TCE was reported in groundwater samples from 5 of 24 and 4 of 18 locations sampled during the Fourth

Quarter 2007 and First Quarter 2008 monitoring events, respectively. TCE was reported in groundwater



samples collected from monitoring wells TT-MW2-3, TT-MW2-11, TT-MW2-17D, TT-MW2-22, and

TT-MW2-24 sampled during the Fourth Quarter 2007 monitoring event at concentrations of 3.7, 7.3,

0.55, 47, and 58 µg/L, respectively. During the First Quarter monitoring event groundwater samples

collected from monitoring wells TT-MW2-11 TT-MW2-17D, TT-MW2-22, and TT-MW2-24 had

concentrations of 7.6, 0.46, 50, and 86 µg/L, respectively. The TCE MCL of 5 µg/L was exceeded in the

samples from TT-MW2-11, TT-MW2-22, and TT-MW2-24 during Fourth Quarter 2007 and First Quarter

2008. Based on the data available at this time, the extent of the TCE plumes in groundwater appear to be

isolated to three small areas and it does not extend off Site.

Methylene chloride was initially reported in groundwater samples collected from TT-MW2-14 during the

Fourth Quarter 2006 at a concentration of 380 µg/L. Since the initial detection the concentration of

methylene chloride in TT-MW2-14 has dropped each quarter to the present concentration of 4.6 µg/L

(First Quarter 2008). Methylene chloride has recently been detected in a newly installed well located in

the Former Liquid Waste Discharge Area (TT-MW2-22) during the Fourth Quarter 2007 and First

Quarter 2008 monitoring events at concentrations of 170 and 200 µg/L, respectively. The methylene

chloride MCL is 5 µg/L. The source of the methylene chloride is not known at this time; however,

repeated detections seems to indicate its presence is not spurious or related to undetected laboratory cross-

contamination.

RDX samples were not collected during the Fourth Quarter 2007 and First Quarter 2008 monitoring

events. RDX samples are collected annually during the Second Quarter sampling event.

4.3 GROUNDWATER MONITORING PROGRAM AND THE GROUNDWATER QUALITY MONITORING NETWORK

Fourteen (14) quarters of water quality monitoring have been conducted at the Site since the September

2004 well installation activities. Groundwater samples have been routinely analyzed for VOCs and

perchlorate. Selected testing for CAM 17 metals, general minerals, 1,4-dioxane, RDX, NDMA, 1,2,3-

TCP and hexavalent chromium has also been performed. A groundwater monitoring sampling and

analysis plan (SAP) was prepared to optimize and better define the GMP at the Site (Tetra Tech, 2007b).

In concurrence with the DTSC, groundwater monitoring will be performed in accordance with the SAP.

Perchlorate was the only analyte identified to be a primary COPC and all monitored wells will be tested

for perchlorate semiannually. Two VOCs, TCE and methylene chloride were identified as secondary

COPCs, and all monitored wells will be tested for VOCs annually. Because of the continued low level

detection of RDX in well TT-MW2-1and the recent detection in well TT-MW2-13, sampling for RDX

will continue to be conducted annually in and around these wells. Because of the detection of arsenic and



vanadium above the MCL, until background levels for metals can be determined, metals will be tested for

in all monitored wells annually.

The analytical scheme will be evaluated annually and changes may be proposed to accommodate

expanded Site knowledge or changing Site conditions. The classifications of the wells in the network and

the corresponding sampling frequency will also be evaluated annually and modified to accommodate

expanded Site knowledge or changing Site conditions.



5.0 REFERENCES Air Force Center for Environmental Excellence (AFCEE)

2002 Monitoring and Remediation Optimization System (MAROS), SOFTWARE User’s Guide, Version 1.1, AFCEE HQ, Brooks AFB, TX, October 30, 2002.

California Department of Health Services (CDHS) 1989 Lockheed Beaumont Consent Order, June 16, 1989.

California Groundwater Bulletin (CGB) 2004 Upper Santa Ana Valley Groundwater Basin, San Timoteo Subbasin, updated February

27, 2004.

Department of Water Resources (DWR) 1959 Effects of Differences in Water Quality, Upper Santa Ana Valley and Coastal San Diego

County, Pasadena, CA November 1959.

Dibblee, T.W. 1981 Geologic Map of Banning (15 minute) Quadrangle, California, South Coast Geologic

Society Map 2.

2003 Geologic Map of the San Jacinto Quadrangle (7.5-minute), Riverside County, California, Santa Barbara Museum of Natural History.

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Review, EPA-540/R-99-008 (PB99-963506), October 1999.

2004 USEPA Contract Laboratory Program National Functional Guidelines for Inorganic Data Review, OSWER 9240.1-45, EPA-540-R-04-004, October 2004

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Guay, Joel R. 2002 Rainfall–Runoff Characteristics and Effects of Increased Urban Density on Streamflow

and Infiltration in the Eastern Part of the San Jacinto River Basin, Riverside County, California, U.S. Geological Survey, Water-Resources Investigations Report 02-4090, 2002.

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6.0 ACRONYMS AND ABBREVIATIONS ARCH air rotary casing hammer

bgs below ground surface

btoc below top of casing

BOS bottom of screen

CAM California Assessment Manual

CDHS California Department of Health Services

COPCs chemical(s) of potential concern

CSM Conceptual Site Model

DTSC Department of Toxic Substances Control

DWNL drinking water notification level

EC electrical conductivity

EPA United States Environmental Protection Agency

ft/ft feet per foot

ft/day feet per day

GCR Grand Central Rocket Company

GMP Groundwater Monitoring Program

HCP Habitat Conservation Plan

HSA hollow stem auger

HSUs hydrostratigraphic units

K hydraulic conductivity.

LAC Lockheed Aircraft Corporation

LEBs Lockheed equipment blanks

LMC Lockheed Martin Corporation

LPC Lockheed Propulsion Company

LR Linear Regression

LTBs Lockheed trip blanks

MW monitoring well

MCLs maximum contaminant levels

MDLs method detection limits



mg/L milligrams per liter

MS matrix spike

MSD matrix spike duplicate

msl mean sea level

µg/L micrograms/liter

NA not applicable

NDMA N-nitrosodimethylamine

NWS National Weather Service

PW production well

PVC polyvinyl chloride

PZ piezometer

QAL Quaternary alluvium

QA/QC quality assurance/quality control

RDX Royal Demolition Explosives

SAP sampling and analysis plan

SKR Stephens’ Kangaroo rat

SS stainless steel

STF San Timoteo Formation

SVOCs semi-volatile organic compounds

TCE trichloroethene

1,2,3-TCP 1,2,3-trichloropropane

TOC top of casing

TOS top of screen

Unk. unknown

u-DMH unsymmetrical dimethyl hydrazine

U.S. United States

USFWS United States Fish and Wildlife Service

VOCs volatile organic compounds

WCA West Coast Analytical Services, Inc.

wSTF weathered San Timoteo Formation

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