MW-184S34.6/6

MW-185S15/5.6

MW-186S15.2/5.8

MW-188S16.8/7.2

MW-193S14.4/5.2

MW-193S24.2/4.8

MW-194S14.7/5.1

MW-195S14.3/6.8

MW-196S22.2/3

MW-205S22.6/5.6

?

?

?

??

?

Am

eri c

an

Av

e

Plymouth

Rd

Fri

en

ds

Rd

Am

eri

ca

n A

ve

Sunset Rd

Northern Disputed Plume Area

Orc

ha

rd R

d

Bn Ranch Rd

Ha

rpe

rs W

ay

Halsted Rd

Hin

kle

y R

d

Grass Hopper

Fossil Bed Rd

MW-111S12.3/3.2

MW-113S23/3

MW-111.3/1.4

MW-123S12/1.9

MW-1242.6/2.6

MW2.1

MW-125S12.3/2.7

MW-126S12.4/3

MW-126S21.5/1.7

MW-127S2.5/3.1

MW-1271.3/2.1

MW-130S23.8/4.3

MW-131S12.5/3.6

MW-133S17.6/7.4

MW-135S13.6/4.4

MW-136S13.7/3.6

MW-136S2ND/ND

MW-137S14.7/4.9

MW-137S33.4/5.5

MW-139S14.6/4.6 MW-140S

4.8/4.9

MW-142S15.2/5.3

MW-154S111/11

MW-154S21.7/1.9

MW-156S1/1.2

MW-157S1.8/2

MW-161S13.4/3.5

MW-162S14/4.4

MW-170S1.8/2.2

MW-171S2.5/3.1

MW-172S12.8/4.1

MW-172S20.51/1

MW-173S13.4/3.5

MW-174S13.4/3.5

MW-175S13.3/3.7

4.2/4.8

MW-193S34.4/8.8

MW-200S11.2/2.9

MW-204S24/3.9

MW-212S13.1/3.5

MW1.8

MW-83D0.59/1.2

MW-83S1.5/2.3

M1.

MW-89S2.7/3.2

DW-031.6/1.6

MW-62A

MW-61.3/2.

MW-ND/N

MW-89D0.76/1

15-051.2/2.0

15-061.5/1.715-08

1.3/1.5

15-132.5/2.9

21-03

22-1032.1/2.1

22-1080.13/ND

22-212.0/2.1

22-39ND/ND

22-481.4/1.4

22-621.2/1.2 22-65

ND/ND

22-731.9/1.9

22-75

22-80ND/ND22-82

1.1/1.1

22-933.2/3.4

23-303.4/3.5

The 3.1/3.2-µg/L contour is shown as "- -?- -" where inferred and cannot be fully delineated byFirst Quarter 2016 monitoring data.

?

?

?

?

?

?

?

?

?

Tindall Rd

n

Rd

Bla

nc

a R

d

Burn

tT

ree

Rd

Pu

eb

lo R

d

Se

rra

Rd

Pe

tra

Rd

Sonoma St

Salinas Rd

Roy RdHolstead Rd

FossilBed

RdA

me

rica

n

Wa

y

Orc

ha

rd S

t

Mo

un

tain

Vie

w R

d

Hin

kle

y R

d

Holstead Rd

Manacor Rd

MW-104S11.4/1

MW-105S2.8/2.9

MW-106S2.9/3.1

MW-107S2.4/2.9

MW-117S21.3/1.4

MW-124S12.6/2.6

MW-124S22.1/2.2

MW-127S12.5/3.1

MW-127S21.3/2.1

MW-128S13.1/3.9

MW-128S23.5/3.7

MW-128S31.8/2

MW-138S15.1/5.2

MW-140S14.8/4.9

MW-141S24.2/4.9

MW-166S1ND/ND

MW-197S11.2/1

MW-206S2.1/2.8

MW-207S18.7/9

MW-68S1.7/2

MW-69S1.8/2.2

MW-70S1.6/2.1

MW-71S0.88/2

MW-72S4.5/5.5

MW-79S5.5/5.3

MW-80S4.5/4.3

MW-84S1.8/1.9

MW-85S1.7/1.7

MW-89S2.7/3.2

MW-94S6.6/6.5

MW-97S5.8/6.2

DW-031.6/1.6

EX-315.2/5.3

EX-32ND/ND

EX-334.4/4.4

EX-352.7/3

G-2R1.9/1.8 G-5R

2.1/2.8

EX-241.6/1.6

MW-104D0.096/ND

MW-105D0.29/ND

MW-106DND/1.2

MW-55AND/ND

MW-68D2.7/3.3

MW-69D1.3/2.6

MW-70D0.67/ND

MW-71D2.1/2.4

MW-79DND/ND

MW-84DND/ND

MW-85DND/ND

W-89D.76/1

G-1R1.8/1.6

23-303.4/3.5

30E-011.6/1.5

BGS-48ND/ND

?

?

?

d

oma St

Thompson Rd

Co

on

Ca

ny

on

Rd

Alcudia Rd

Coon Canyon Rd

Co

on

Ca

ny

on

Rd

Bu

rnt

Tr e

eR

d

Mountain General Rd

Mountain General Rd

SEE FOOTNOTE 2

SEE

FOOTNOTE 3

Northern Disputed Plume Area

MW-178S180/200

CA-MW-108S15/NS

SC-MW-12S400/380

MW-108S40/43

MW-10913/14

MW-118S2.5/2.7

MW-119S2.2/2.6

MW-121S2.3/2.5

MW-147S2.2/2.1

MW-155S0.33/NS

MW-159D5.7/5.4

MW-159S6.5/6.1

MW-163DND/ND

MW-163S8.7/9.1

MW-169S22.4/2.7

MW-177S0.75/NS

MW-180RS140/NS

MW-181S0.8/NS

MW-182S5.1/NS

MW-183S27/NS

MW-202S1.4/1.9

MW-203S3/2.9

MW-28A15/16

MW-294.8/5.1

MW-3653/52

MW-371.3/1.5

MW-38A1.2/1.5

MW-45A2.4/2.7

MW-54ND/1.2

MW-580.55/1.1

MW-631.1/2.1

MW-66A3.7/3.9

MW-73S1.1/NS

MW-76S3.6/3.5

MW0.83

SA-MW-01S240/250

SA-M410/4

SA-MW-11S310/NS

SA-MW-16S310/340

SA-MW-180/220

SA-MW-26S270/290

CA-MW-201ND/NS

CA-MW-3011.7/2.3

CA-MW-302SND/ND

CA-MW-4015.3/4.9

CA-MW-402S27/27

CA-MW-403S0.33/ND

CA-MW-404S31/30

CA-MW-501S4/4.1

DW-021.7/1.8

DW-031.6/1.6

EX-052.8/2.9

EX-17ND/ND

MW-04410/460

SC-MW-13S120/120 SC-MW-2

470/480

EX-155/4.8

EX-164.4/4.3

EX-209.1/8.6

EX-212.8/2.7

EX-2223/22

EX-299.3/9.2

EX-3031/32

IW-0123/25

EX18

EX-016/16

EX-033.2/3.2

EX-232.1/2.2

EX-361.6/1.6

IN-01

IN-02

IN-03

IN-04

IN-05

IN-06

IN-03R

EX-044.5/4.8

MW-08ND/NS

MW-119D1.7/2.4

MW-121D3.6/3.6

MW-122DND/ND

MW-153S4.1/5.3

MW-155DND/NS

MW-164DND/ND

MW-177D1.6/NS

MW-181D1.1/NS

MW-182D13/NS

MW-183D26/NS

MW-203D0.26/1.4

M24

MW-23B17/17

MW-28B8.2/9.4

MW-32.5/2

MW-38B29/30

MW-40ND/ND

MW-42B121/22

MW-42B247/48

MW-45.3/5

MW-44B1.7/2.1

MW-45B1.2/1.8

MW-472/2.7

MW-62A2/2.2

MW-73D0.76/NS

CA-MW-312D33/32

CA-MW-412D27/28

SC-MW-11DND/ND

MW-101D2.6/2.4

MW-178D240/NS

MW-1826/NS

MW-180RD200/NS

MW-67B0.55/NS

SA-MW-02DND/1.2

SA-MW-07D370/NS

SA-MW-11D35/NS SA-MW-18

100/99

SA-MW-26D0.99/1.6

CA-MW

CA-MW-204D14/NS

CA-MW-302D110/110

CA-MW-402DND/ND

CA-MW-404DND/NS

CA-MW-506D12/12

EX-100

EX-3713/13

02-02B0.28/ND

02-230.6/ND

27-431.6/1.6

02-02A0.32/ND

21-030.2/ND

22-731.9/1.9

22-751.9/1.9

26-6ND/N

20.

27-161.3/1.3

27-261.3/1.4

27-420.35/ND

27-480.63/ND

27-490.83/ND

28-16ND/ND

28-201.2/1.3

28-212.2/2.1

28-361.1/2.8

28-373.1/3.0

28-383.2/3.1 28-51

ND/ND

28-522.4/2.7

28-620.58/ND

28-663.9/4.1

34-38ND/ND

34-500.9/ND

34-630.72/ND

34-770.63/ND

Approximate 10-µg/L outline of Cr(VI) or Cr(T) concentrations in the Upper Aquifer, First Quarter 2016.

Approximate 50-µg/L outline of Cr(VI) or Cr(T) concentrations in the Upper Aquifer, First Quarter 2016. (Dashed where inferred)

Approximate outline of Cr(VI) or Cr(T) concentrationsin the Upper Aquifer exceeding 3.1 and 3.2 µg/L, respectively, First Quarter 2016.

Alcudia Rd

Front ier RdH

op

e S

t

Park Ave

Acacia St

Sy

ca

mo

re S

t

Hid

de

n R

ive

r R

d

Ind

ian

We

lls

Rd

Lo

cu

st

Rd

Re

d R

oc

k R

d

Hil

lvie

w R

d

Granada Rd

Willow Springs Rd

Kinski Rd

Flo

we

rR

d

Se

rra

Rd

Mo

un

tain

Vie

w R

d

Va

lle

y W

ell

s R

d

Hin

kle

y R

d

Carson Rd

Aquarius Rd

SEE

FOOTNOTE 3

Riverview Rd

R:\PGEHINKLEY20000353\MAPFILES\2016\GMP\Q1\FIG5-5_PLUMEMAP_UA_1Q16.MXD 5/5/2016

LEGEND:

Groundwater Monitoring Well

Agricultural Supply Well

Domestic Supply Well

Other Supply Well

Groundwater Extraction Well (Active)

Multiuse Test Well, or Inactive Extraction/Injection Well

Freshwater Injection Well

PG&E-Owned Property

PG&E Compressor Station

County Parcel

Transmission Line

Approximate Limit of Saturated Alluvium Upper Aquifer

Approximate Location of Lockhart Fault; Fault Trace is Inferred, and There is No Surface

Expression (Stamos et al., 2001)

Bedrock Exposed at Ground Surface

NOTES:

1. Chromium results are shown for Site-wide Groundwater Monitoring Program and domestic wells sam the reporting period, the most recent results are shown.

2. The concentration contours are based on First Quarter 2016 chromium results for the groundwater m Upper Aquifer as noted on Figures 5-1 and 5-2. Results for domestic wells (brown-colored labels) w pursuant to the Lahonton Regional Water Quality Control Board's Cleanup and Abatement Order dat

3. Pursuant to the Lahonton Regional Water Quality Control Board's Cleanup and Abatement Order da if they are located in the areas southwest of the Lockhart Fault and on or east of Dixie Road. Monito United States Geological Survey investigations.

4. Chromium plume contours in the general area south of Highway 58, were developed using a larger s and Northwest Freshwater Injection Projects (Arcadis 2016). Select wells from that program are sho

WORKS CITED:

Stamos, C.L., P. Martin, T. Nishikawa, and B.F. Cox. 2001. Simulation of Ground-Water Flow in the

Mojave River Basin, California. U.S. Geological Survey Water-Resources Investigations Report 01-4002, Version 3. Prepared in cooperation with the Mojave Water Agency.

µg/LCr(VI)Cr(T)IRZNDNS

micrograms per literhexavalent chromiumtotal dissolved chromiumIn Situ Reactive Zonenot detectednot sampled

ABBREVIATIONS:

Groundwater Cr(VI) concentrations in monitoring wells:

More than 1,000 μg/L

100 to 1,000 μg/L

50 to 100 μg/L

10 to 50 μg/L

3.1 to 10 μg/L

Less than 3.1 μg/L or ND

Well IDCr(VI)/Cr(T) concentrations in µg/L; maximum of primary and duplicate samples during First Quarter 2016 sampling.

MW-77S0.88/ND

CA-MW-102SND/NS

MW-071.4/1.4

MW-110S4.1/6.2

MW-112S3.1/3.4

MW-12AND/NS

MW-145S3.3/3.4

MW-14A3.2/3

MW-14S30/34

MW-167.1/7.3

MW-17110/NS

MW-179S0.6/NS

MW-192S4.2/4.5

MW-20ND/ND

MW-208S2600/2800

MW-209S69/67

MW-210S0.16/ND

MW-211S0.89/1.1

MW-21A4.1/5.5

MW-27A11/12

MW-32S3.3/4.1

MW-33A1.8/2.2

MW-3921/24

MW-41S10/10

MW-460.62/NS

MW-49S4/5

MW-50S15/17

MW-55S2.5/3.5

MW-631.1/2.1

MW-77S0.83/ND

MW-78S1.1/NS

MW-86S1.7/1.7

MW-87S3.3/4.2

MW-88S6.1/7.1

MW-95S8.3/9.4

MW-96S2.8/2.8

PMW-050.43/NS

MW-01S/250

SA-MW-03SND/ND

SA-MW-04S330/320

SA-MW-06S410/410

SA-MW-09S56/NS

SA-MW-17S180/220

SA-MW-25S2.8/2.7

-26S

SA-MW-27S0.32/ND

SA-SM-01S480/NS

SA-SM-02S2000/NS

SA-SM-05SND/NS

SA-SM-07SND/NS

SA-SM-10SND/NS

SC-MW-01S0.54/1.1

SC-MW-02S1.2/1.5

BW-01S3.9/4.2

C-026.3/6.7

C-032.2/1.9

CA-MW-201ND/NS

CA-MW-2020.21/NS

CA-MW-310S12/11

CA-MW-317S5.1/4.9

-MW-403S3/ND

-MW-404S30

CA-MW-406ND/1.7

CA-MW-411S25/25

CA-MW-508S1.6/1.8

CA-MW-510S6.7/6.5

DW-031.6/1.6

5.2/5.3

FW-011/1.1

MW-01650/710

MW-050.65/ND

MW-062.8/2.8

SC-MW-03S7/6.8

SC-MW-04S0.8/NDSC-MW-05S

1.4/ND

SC-MW-06S1/1

SC-MW-07S1.7/1.5

SC-MW-08S2.1/2.1

SC-MW-09S2.3/2.1

SC-MW-10S2.4/2.3

SC-MW-14S0.91/ND

SC-MW-15S0.69/1.1

SC-MW-16S0.77/1.1

SC-MW-21S470/480

SC-MW-38S1.1/NS

Y-015.4/4.9

Y-036/5.7

EX-2223/22

IW-0123/25 IW-02

13/14

IW-035.2/5.2

EX-0118/18

EX-0216/16

X-23.1/2.2

EX-241.6/1.6

EX-255.1/7.2

EX-3423/24

EX-3832/33

EX-39110/130

EX-50320/340

X-112.7/NS

X-167.4/NS

X-04 X-05

X-10X-12X-13

MW-08ND/NS

MW-091.8/1.7

MW-110D1.5/1.8

MW-116D11.6/2

MW-14B30/31

MW-179D30/NS

MW-17D1.2/NS

MW-192D4.5/5

MW-21B112/12

MW-22B24/25

-23B7

MW-27B7.4/8.3

MW-312.5/2.3

MW-39D28/NS

MW-435.3/5.5

MW-49B1.8/1.9

MW-50B2.3/2.4

MW-565.6/5.3

2.7/3.3

MW-78D1.6/NS

MW-86D1.5/2

MW-87D2.4/2.9

MW-88D1/1.2

SA-MW-05D1500/1600

SA-MW-10D330/350

SA-MW-15D81/NS

SA-MW-25D0.86/ND

SA-MW-27D1.6/1.8

SA-SM-11D94/93

SC-MW-03D310/320

BW-01D4.6/4.3

CA-MW-107DND/NS

CA-MW-510D9.1/9.1

FW-030.27/ND

FW-040.31/ND

MW-03A2.4/NS

SC-MW-04D1/1.1

SC-MW-06D1.1/1.1

-11D

SC-MW-14D0.84/1

SC-MW-15D1.2/1.7

SC-MW-16D1.1/1.6

MW-102D2.5/3.1

MW-11B35/NS

MW-12B13/NS

MW-1326/25

MW-178D240/NS

MW-1826/NS

-180RDNS

MW-32B14.7/4.7

MW-32B23.7/3.6

MW-33B1.7/1.8

MW-350.85/ND

MW-49A3.5/3.5

PMW-030.28/NSPMW-04

3/NS

PMW-06ND/NS

PT2-MW-103.4/NS

SA-MW-07D370/NS

SA-MW-09DND/NS

SA-MW-18D100/99

SA-MW-20D80/79SA-SM-08D

710/770

SA-SM-10D29/NS

SC-MW-01D0.99/1.4

SC-MW-02D180/200

CA-MW-102DND/NS

CA-MW-104D1.5/NS

CA-MW-106DND/NS

CA-MW-315D71/72

MW-404D/NS

CA-MW-405D86/82

-MW-506D12

CA-MW-508D6.3/6.2

SC-MW-05D1.2/1.2

SC-MW-07D1.2/1.3

SC-MW-08D1.7/1.6

SC-MW-26D760/NS

SC-MW-38D23/27

EX-4124/23

EX-4775/74

EX-527.1/9.1

FW-021.1/1.2

EX-40140/140

EX-42260/280

EX-43140/130

EX-44100/100

EX-45350/360

EX-4669/69

EX-4858/63

EX-49160/170

EX-5118/17

X-06

X-09

01-01A0.46/ND

25-162.6/2.6

26-65ND/ND

26-660.3/ND

36-260.81/1.4

36-412.2/2.3

Approximate 1000-µg/L outlineof Cr(VI) or Cr(T) concentrations in the Upper Aquifer, First Quarter 2016.

Fa

irv

iew

Rd

Dix

ie R

d

Acacia S

t

Dix

ie R

d

Highcrest Rd

Alcudia Rd

Community Blvd

Santa Fe Ave

Lenwood Rd

Le

nw

oo

d R

dL

en

wo

od

Rd

Riv

erv

iew

Rd

58

Su

mm

ers

et

Rd

FIGURE 5-5

CHROMIUM RESULTS FOR FIRST QUARTER 2016

GROUNDWATER GROUNDWATER MONITORING AND

DOMESTIC WELL SAMPLING AND MAXIMUM

COMPOSITE PLUME OUTLINE IN UPPER AQUIFER

FIRST QUARTER 2016 GROUNDWATER MONITORING REPORT AND DOMESTIC WELL RESULTSSITE-WIDE GROUNDWATER MONITORING PROGRAM PACIFIC GAS AND ELECTRIC COMPANY HINKLEY COMPRESSOR STATIONHINKLEY, CALIFORNIA

tic wells sampled in the First Quarter (January through March) 2016 monitoring period. For wells sampled multiple times during

oundwater monitoring and extraction wells that are completed in the shallow zone and deep zone of theed labels) were not used for chromium plume contouring except for those in the northern area, nt Order dated November 4, 2015.

nt Order dated November 4, 2015, groundwater monitoring wells are not used for chromium contouringoad. Monitoring wells sampled southwest of Lockhart Fault and east of Dixie Road were sampled in support of

ng a larger set of monitoring data which is presented in the the April 15, 2016 First Quarter 2016 Monitoring Report for the In Situ Reactive Zone ram are shown here for reference.

0 1,000 2,000

Feet