Hitachi Chloroform Release Area Figure 2-4-24...GW-028J-Z 24' 1.8 Sample ID Sample Depth Chloroform...

Sample IDSample Depth Chlo ro fo rm

5 ' 245 ' 20

10 ' 0 .34SG-TR-11

Sample IDSam ple Depth Chlo ro fo rm

5 ' 1210 ' 16

SG-TR-12


5 ' 4 .55 ' 4 .3

10 ' 7 .9SG-0 28J-4

Sam ple IDSample Depth Chlo ro fo rm

5 ' 0 .235 ' < 0 .1 7

10 ' 0 .2 3SG-0 28 J-2


5 ' < 0 .0 81 0 ' < 0 .0 8

SG-0 28 J-1


5 ' < 0 .0 81 0 ' 0 .4 5

SG-TR-1 3


5 ' 0 .3 61 0 ' 1 .8

SG-02 8 J-5


5 ' < 0 .0 81 0 ' 1 .2

SG-0 28 J-8


5 ' < 0 .0 81 0 ' < 0 .0 8

SG-0 2 8 J-1 0

Sam ple IDSam ple Depth Chlo ro fo rm

5 ' < 0 .0 810 ' < 0 .08

SG-0 2 8J-1 1


5 ' < 0 .0 81 0 ' 0 .1 6

SG-0 2 8 J-1 2


5 ' 0 .1 610 ' 1 .1

SG-0 2 8J-1 3


5 ' < 0 .0 810 ' < 0 .08

SG-0 2 8J-1 4


5 ' < 0 .0810 '

Bo ring Num ber

Sam ple Depth Chlo ro fo rm

0 ' < 4 .95 ' < 5 .0

10 ' < 4 .915 ' < 4 .920 ' < 4 .9

28J-1

Bo ring Num ber


0 ' < 5 .05 ' < 4 .8

10 ' < 4 .915 ' < 5 .020 ' 14

28J-3

Bo ring Num ber


0 ' < 4 .95 ' 8 .5

11 ' 1416 ' 1720 ' 15

28J-4

Boring Num ber


0 ' < 4 .95 ' < 5 .0

10 ' < 5 .016 ' 5 .720 ' < 4 .9

2 8J-5

Boring Num ber


0 ' < 4 .95 ' < 5 .0

10 ' < 5 .015 ' < 5 .020 ' < 4 .9

2 8J-6

Boring Num ber


0 ' < 4 .95 ' < 4 .8

10 ' < 5 .015 ' 7 .220 ' 10

2 8J-7

Boring Num ber


0 ' < 4 .95 ' < 5 .0

10 ' < 4 .815 ' 8 .720 ' 10

2 8J-8

Bo ring Num ber


5 ' 510 ' < 4 .815 ' 1320 ' 21

28 J-A

Boring Num ber


5 ' 5 .810 ' 5 .315 ' 1820 ' 21

28 J-B

Boring Num ber


5 ' 1810 ' < 5 .015 ' 1620 ' 22

2 8J-C

Bo ring Num ber


5 ' 6 .71 0 ' < 4 .51 5 ' 212 0 ' 16

28 J-D

Bo ring Num ber


5 ' 5 .31 0 ' 6 .11 5 ' 212 0 ' 31

2 8J-E

Bo ring Num ber


5 ' < 8 .51 0 ' < 8 .21 5 ' 162 0 ' 10

28 J-F

Bo ring Num ber


5 ' 51 0 ' < 7 .81 5 ' 202 0 ' 27

28 J-G

Boring Num ber


5 ' < 4 .210 ' < 4 .815 ' 9 .220 ' 15

2 8J-H

Bo ring Num ber


5 ' < 3 .81 0 ' < 5 .91 5 ' < 4 .02 0 ' < 4 .3

28J-I

Boring Num ber


5 ' < 4 .010 ' < 4 .415 ' 7 .620 ' 9 .7

2 8J-J

Boring Num ber


5 ' < 4 .410 ' < 4 .915 ' 620 ' 7 .1

02 8J-K

Bo ring Num ber


5 ' 5 .91 0 ' < 4 .21 5 ' 9 .32 0 ' 11

02 8J-L

Boring Num ber


5 ' 610 ' < 4 .415 ' 5 .920 ' 9 .1

02 8J-M

Bo ring Num ber


5 ' < 4 .41 0 ' < 4 .81 5 ' < 4 .02 0 ' < 4 .1

028 J-N

Boring Num ber


5 ' < 4 .010 ' < 4 .215 ' < 4 .420 ' < 4 .1

02 8J-PBoring

Num berSam ple Depth Chlo ro fo rm

5 ' < 4 .710 ' < 4 .515 ' < 4 .120 ' < 4 .125 ' < 4 .3

02 8J-O

Bo ring Num ber


0 ' < 4 .95 ' < 4 .8

10 ' < 4 .915 ' < 5 .020 ' < 4 .9

28J-2

Boring Num ber

Sample Depth Chlo ro fo rm

W V-0 3 -1 5 ' < 4 .8

Boring Num ber


W V-0 3 -2 5 ' < 4 .9

Bo ring Number


TR-9 ~4 .5 ' < 4 .9


GW -028 J-X 24 ' 73


GW -02 8 J-Z 24 ' 1 .8


GW -28 J-O 27 ' 3 .5


GW -02 8J-3 26 ' < 1


GW -0 28J-2 2 6 ' < 4


GW -0 28J-4 2 7 ' < 1


GW -0 28 J-5 24 ' < 2


GW -0 28 J-6 26 ' < 1


GW -0 28J-7 2 5 ' 28


GW -02 8J-1 2 26 ' 9 .2


GW -02 8J-13 2 9 ' 120


GW -02 8J-15 2 9 ' < 1


GW -02 8J-16 30 ' < 4


GW -2 8 J-Q 2 9 ' < 2


GW -028 J-Y 2 6 ' < 1Sam ple ID


GW -028J-1 27 ' < 4


GW -028J-S 30 ' 8


GW -28 J-R 2 9 ' < 2


GW -02 8J-T 33 '

Sample ID Sample Date ChloroformMay-07 49Sep-07 15Nov-07 15Jan-08 19Feb-08 17Apr-08 17May-08 14Aug-08 9.1Oct-08 11

EW-1

Sample ID Sample Date ChloroformMay-07 95Sep-07 31Nov-07 28Jan-08 22Feb-08 19Apr-08 17May-08 21Aug-08 7.6Oct-08 8.9

EW-2

Sample ID Sample Date ChloroformMay-07 2.0Sep-07 2.2Nov-07


CP T-1 44 -4 6 ' 3 .8

Sam ple IDSample Depth Chloro fo rm

CP T-2 4 4 -4 6 ' < 1 .0


CP T-5 4 4-4 6 ' 34


CP T-6 4 7 -4 9 ' < 1 .0CP T-6 -DUP 4 7 -4 9 ' < 1 .0


CP T-8 4 7 -49 ' < 1 .0

FORMERBUILDING

028J

EW-1

EW-2

EW-3

EW-7

EW-6

EW-5

EW-4

EW-9

EW-10

EW-11

EW-12

EW-14

EW-13 EW-15

EW-8

20,00

0-gallo

n

Holdin

g Tan

k

17,000-gallonHolding Tank

20-FootGate

20-FootGate

2-PHASE Extraction Skidwith Heat Exchanger and two1,000-pound Carbon Vessels

TM

Standby CarbonVessels

Well Manifold

Diesel-PoweredGenerator withSecondaryContainment

EW-17

EW-16

EW-18

Remediation Area LayoutHitachi GSTSan Jose, California

10

EXPLANATION:

Groundwater Monitoring/ Extraction Well

Construction Fence

12-foot Security Fence

Aboveground ExtractionWell Piping

EW-12

Building 028J and all otherbackground structures shownhave been demolished.

AIR/WATERSEPARATOR

"C1" 1,000 LBVAPOR-PHASE CARBON VESSEL

"C2" 1,000 LBVAPOR-PHASE CARBON VESSEL

HOLDING TANK

TM2-PHASE Extraction Process Flow DiagramHitachi GSTSan Jose, California 11

Figure

Drafter: Date: Contract Number: Approved: Revised:EC 9/28/07 03-11903E

q:\D

RA

WIN

GS

\0311903E

\11903E

-SO

IL V

AP

OR

PF

D

PVC Well Casing

1" PVC Suction Pipe

Extraction Line

("STINGER")

Vacuum/VaporSampling Port

Water LevelMeasurement Port

TM

Revised:Approved:Contract Number:Date:Drafter:

Figure

Q:\D

RA

WIN

GS

\03

11

90

3E

\11

90

3E

-EX

-7-2

.dw

g -

Wed

, 2

5 J

un 2

00

8 -

10

:46

am

EC 9/28/07 03-11903E

Schematic of 2-Phase Extraction Well HeadHitachi GSTSan Jose, California 12

Groundwater Elevations in Monitoring Wells June 2007 – October 2008Hitachi GSTSan Jose, California

CJR 10/27/08 03-11903E

13

153

154

155

156

157

158

159

160

161

162

163

May 1, 2007June 6, 2007July 12, 2007August 17, 2007September 22, 2007

October 28, 2007December 3, 2007

January 8, 2008February 13, 2008

March 20, 2008April 25, 2008May 31, 2008July 6, 2008August 11, 2008September 16, 2008

October 22, 2008November 27, 2008

Date

Gro

undw

ater

Ele

vatio

n (fe

et, M

SL

Dat

um)

EW-1 EW-3 EW-7 EW-8 EW-12 EW-15

Chloroform Concentrations in Extracted Vapor and Cumulative Mass RemovalHitachi GSTSan Jose, California

CJR 11/6/08 03-11903E

14

0

2

4

6

8

10

12

14

16

July 25, 2007August 22, 2007September 19, 2007


December 12, 2007

January 9, 2008February 6, 2008March 5, 2008April 2, 2008April 30, 2008May 28, 2008June 25, 2008July 23, 2008August 20, 2008

Date

Chl

orof

orm

Con

cent

ratio

n (u

g/L)

0

1

2

3

4

5

6

7

8

9

Chlo

rofo

rm R

emov

al (p

ound

s)

System Off11/3 to 12/4

Cumulative Chloroform Removed(bars represent estimation error)

Chloroform Concentrationin Extracted Vapor

EW-16Added

EW-17 and EW-18Added

Chloroform Mass Removal Rate Versus TimeHitachi GSTSan Jose, California

CJR 11/6/08 03-11903E

15

0

0.5

1

1.5

2

2.5

July 25, 2007August 22, 2007September 19, 2007


December 12, 2007

January 9, 2008February 6, 2008March 5, 2008April 2, 2008April 30, 2008May 28, 2008June 25, 2008July 23, 2008August 20, 2008

Date/Time

Chl

orof

orm

Mas

s R

emov

al R

ate

(pou

nds/

wee

k)

System Off

11/3 to 12/4

EW-16 Added

EW-17 and EW-18Added

Location ID Depth Sep-07 Nov-07 Aug-08 Oct-085'

Chloroform Concentration Trend in Area of Residual Chloroform WellsHitachi GSTSan Jose, California

CJR 11/6/08 03-11903E

17

673

468

118160169

243253 248

188

237

187

124163

211

250268

230

0

100

200

300

400

500

600

700

800

May 1, 2007June 6, 2007July 12, 2007August 17, 2007September 22, 2007

October 28, 2007

December 3, 2007

January 8, 2008February 13, 2008

March 20, 2008April 25, 2008May 31, 2008July 6, 2008August 11, 2008September 16, 2008


Date

Chlo

rofo

rm C

once

ntra

tion

(ug/

L)

Average of EW-5, EW-9, EW-10, and EW-13Average of EW-5, EW-9, EW-10, EW-13, and EW-16Risk-Based Target Concentration (assuming vapor migration into a home)RWQCB-SF Cleanup Goal (assuming use as a drinking water source)

FORMERBUILDING

028J

EW-1

EW-2

EW-3

EW-7

EW-6

EW-5

EW-4

EW-9

EW-10

EW-11

EW-12

EW-14

EW-13EW-15

EW-8

20,00

0-gallo

n

Holdin

g Tan

k

17,000-gallonHolding Tank

20-FootGate

20-FootGate

SB-2

SB-1

SB-3

SB-4

SB-5

SB-6

SB-7SB-8

EW-17

EW-16

EW-18

18

Soil Boring Location -April 2008

Groundwater Monitoring /Extraction Well

Construction Fence

12-foot Security Fence

EXPLANATION:

EW-12

Location of April/May 2008 Soil BoringsHitachi GSTSan Jose, California

Location ID Depth Unit Chloroform5.5 Vadose Zone

EW-1

EW-2

EW-3

EW-7

EW-6

EW-4

EW-10

EW-11

EW-14

EW-13

EW-8CPT-8CPT-7

CPT-3

CPT-4

CPT-6

CPT-2CPT-1

EW-15

CPT-5

EW-12

EW-9

A

A'

B'

B

FORMERBUILDING

028J

SB-2

SB-3

SB-4

SB-5

SB-6

SB-7SB-8EW-17

EW-5

SB-1

EW-16

EW-18

C

C'

Hydrostratigraphic Cross-SectionLocation MapHitachi GSTSan Jose, California

20

EXPLANATION:

Groundwater Monitoring/ Extraction Well

EW-12

CPT Location(April 17-19, 2007)

Soil Boring Location(April 2008)

Building 028J and all otherstructures shown have beendemolished. Structures shownare for reference only.

Figure 24Approximate Mass and Extent of Chloroform Before and After Remediation

Vadose

A AquiferA/B Aquitard

B Aquifer

Vadose

A AquiferA/B Aquitard

B Aquifer

Before RemediationMarch 2007

After RemediationOctober 2008

2.08 pounds

4.66 pounds>0.53 pounds

0.0066 pounds

0.07 to 0.24 pounds0.25 to 0.81 pounds

Total Estimated Chloroform Mass >7.27 Pounds Total Estimated Chloroform Mass ~ 0.68 Pounds

Soil Gas >RBTCs

200 feet

170 feet

Groundwater >80 ug/L

75 feet

50 feet

Groundwater >80 ug/L

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Hitachi Chloroform Release Area Figure 2-4-24...GW-028J-Z 24' 1.8 Sample ID Sample Depth Chloroform...

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