Agenda packet — Yorba Linda City Council, January 20, 2026 (part 5 of 17)

This software is registered to: Leighton Group, Inc
:: Vertical settlements estimation for saturated sands ::

Depth
(ft)
D50
(in)
qc/N ev
(%)
Δh
(ft)
s
(in)
ev
weight
factor

30.00 0.00 5.00 0.49 2.03 5.00 1.217

35.00 0.00 5.00 0.41 0.00 5.00 0.000

40.00 0.00 5.00 0.32 0.00 10.00 0.000

50.00 0.00 5.00 0.15 0.00 10.00 0.000

60.00 0.00 5.00 0.00 0.00 0.50 0.000
Abbreviations
Cumulative settlements: 1.935
D50:
qc/N:
ev:

Δh:
s:

Median grain size (in)
Ratio of cone resistance to SPT
Post liquefaction volumetric strain (%)
Thickness of soil layer to be considered (ft)
Estimated settlement (in)
:: Lateral displacements estimation for saturated sands ::

Depth
(ft)
(N1)60 Dr
(%)
γmax
(%)
dz
(ft)
LDI LD
(ft)

5.00 60 100.00 0.00 5.00 0.000 0.00

10.00 44 100.00 0.00 5.00 0.000 0.00

15.00 27 72.75 10.03 5.00 0.000 0.00

20.00 54 100.00 0.00 5.00 0.000 0.00

25.00 82 100.00 0.00 5.00 0.000 0.00

30.00 10 44.27 51.20 5.00 0.000 0.00

35.00 77 100.00 0.00 5.00 0.000 0.00

40.00 93 100.00 0.00 10.00 0.000 0.00

50.00 58 100.00 0.00 10.00 0.000 0.00

60.00 106 100.00 0.00 0.50 0.000 0.00

0.00 Abbreviations
Cumulative lateral displacements:

Dr:
γmax:
dz:

LDI:

LD:

Relative density (%)
Maximum amplitude of cyclic shear strain (%)
Soil layer thickness (ft)
Lateral displacement index (ft)
Actual estimated displacement (ft)
Project File: P:\INFOCUS PROJECTS\13501-14000\13867 MTC Yorba Linda\001\Analyses\LiqSV\9-11-24\13867.001_LiqSV_LRM - ev on.lsvs LiqSVs 2.3.2.11 - SPT & Vs Liquefaction Assessment Software Page: 34

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S P T B A S E D L I Q U E F A C T I O N A N A L Y S I S R E P O R T :: Input parameters and analysis properties ::

Analysis method:

Fines correction method:

Sampling method:

Borehole diameter:

Rod length:

Hammer energy ratio:

NCEER 1998
NCEER 1998
Standard Sampler
65mm to 115mm

3.30 ft

1.41 G.W.T. (in-situ):

G.W.T. (earthq.):

Earthquake magnitude Mw:

Peak ground acceleration:

Eq. external load:

Project title : Yorba Linda Widening
Location :

SPT Name: LB-8

40.75 ft

31.00 ft

6.67 0.66 g

0.00 tsf
Raw SPT Data
SPT Count (blows/ft)
0 20 40
Depth (ft)
100
95 90
85 80
75 70
65 60
55 50
45 40
35 30
25 20
15 10
5 Raw SPT Data
Insitu
CSR - CRR Plot

CSR - CRR

10.80.60.40.20 Depth (ft)
100
95 90
85 80
75 70
65 60
55 50
45 40
35 30
25 20
15 10
5 CSR - CRR Plot
During earthq.

FS Plot
Factor of Safety

21.510.50
Depth (ft)
100
95 90
85 80
75 70
65 60
55 50
45 40
35 30
25 20
15 10
5 FS Plot
During earthq.

LPI
Liquefaction potential
0 5
Depth (ft)
100
95 90
85 80
75 70
65 60
55 50
45 40
35 30
25 20
15 10
5 LPI
During earthq.

CRR 7.50 clean sand curve
Corrected Blow Count N1(60),cs
1050 15 20 25 30 35 40 45 50
Cyclic Stress Ratio*

0.8 0.7

0.6 0.5

0.4 0.3

0.2 0.1

0.0 CRR 7.50 clean sand curve
Liquefaction
No Liquefaction
F.S. color scheme
Almost certain it will liquefy
Very likely to liquefy
Liquefaction and no liq. are equally likely
Unlike to liquefy
Almost certain it will not liquefy
LPI color scheme
Very high risk
High risk
Low risk
Project File: P:\INFOCUS PROJECTS\13501-14000\13867 MTC Yorba Linda\001\Analyses\LiqSV\9-11-24\13867.001_LiqSV_LRM - ev on.lsvs LiqSVs 2.3.2.11 - SPT & Vs Liquefaction Assessment Software Page: 35

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This software is registered to: Leighton Group, Inc
Raw SPT Data
SPT Count (blows/ft)
50403020100
Depth (ft)
100
95 90
85 80
75 70
65 60
55 50
45 40
35 30
25 20
15 10
5 Raw SPT Data
Insitu
CSR - CRR Plot

CSR - CRR

10.80.60.40.20 Depth (ft)
100
95 90
85 80
75 70
65 60
55 50
45 40
35 30
25 20
15 10
5 CSR - CRR Plot
During earthq.

FS Plot
Factor of Safety
0 1.510.5 2
Depth (ft)
100
95 90
85 80
75 70
65 60
55 50
45 40
35 30
25 20
15 10
5 FS Plot
During earthq.

Vertical Liq. Settlements
Cuml. Settlement (in)
0 0.5 1
Depth (ft)
100
95 90
85 80
75 70
65 60
55 50
45 40
35 30
25 20
15 10
5 Vertical Liq. Settlements
During earthq.

Lateral Liq. Displacements
Cuml. Displacement (ft)
0 Depth (ft)
100
95 90
85 80
75 70
65 60
55 50
45 40
35 30
25 20
15 10
5 Lateral Liq. Displacements
During earthq.
:: Overall Liquefaction Assessment Analysis Plots ::

Project File: P:\INFOCUS PROJECTS\13501-14000\13867 MTC Yorba Linda\001\Analyses\LiqSV\9-11-24\13867.001_LiqSV_LRM - ev on.lsvs LiqSVs 2.3.2.11 - SPT & Vs Liquefaction Assessment Software Page: 36

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This software is registered to: Leighton Group, Inc
Test
Depth
(ft)
:: Field input data ::

SPT Field
Value
(blows)
Fines
Content
(%)
Unit
Weight
(pcf)
Infl.

Thickness
(ft)
Can
Liquefy

5.00 9 60.00 125.68 5.00 No

10.00 3 60.00 120.00 5.00 Yes

15.00 6 60.00 120.00 5.00 Yes

20.00 7 60.00 120.00 0.50 Yes

20.50 7 60.00 120.00 4.50 Yes

25.00 4 15.00 120.00 5.00 Yes

30.00 13 3.90 120.00 5.00 Yes

35.00 23 5.00 120.00 5.00 Yes

40.00 19 5.00 120.00 5.00 Yes

45.00 17 8.90 120.00 5.00 Yes

50.00 45 5.00 120.00 5.00 Yes

55.00 39 5.60 120.00 5.00 Yes

60.00 53 5.00 120.00 5.00 Yes

65.00 38 5.00 120.00 5.00 Yes

70.00 2 80.00 120.00 2.50 No

72.50 2 31.50 120.00 2.50 No

75.00 32 5.00 120.00 5.00 Yes

80.00 37 5.00 120.00 5.00 Yes

85.00 37 5.00 120.00 5.00 Yes

90.00 100 10.00 120.00 5.00 Yes

95.00 100 10.00 120.00 5.00 Yes
100.00 100 10.00 120.00 1.50 Yes
Abbreviations
Depth:

SPT Field Value:

Fines Content:

Unit Weight:

Infl. Thickness:

Can Liquefy:

Depth at which test was performed (ft)
Number of blows per foot
Fines content at test depth (%)
Unit weight at test depth (pcf)
Thickness of the soil layer to be considered in settlements analysis (ft) User defined switch for excluding/including test depth from the analysis procedure :: Cyclic Resistance Ratio (CRR) calculation data ::

Depth CRR7.5
(ft)
SPT
Field
Value
CN CE CB CR CS (N1)60 Fines α β (N1)60cs
Content
(%)
σv
(tsf)
uo
(tsf)
σ'vo
(tsf)
Unit
Weight
(pcf)

5.00 9 125.68 0.31 0.00 0.31 1.47 1.41 1.00 0.75 1.00 14 60.00 5.00 1.20 22 4.000

10.00 3 120.00 0.61 0.00 0.61 1.24 1.41 1.00 0.85 1.00 4 60.00 5.00 1.20 10 4.000

15.00 6 120.00 0.91 0.00 0.91 1.07 1.41 1.00 0.85 1.00 8 60.00 5.00 1.20 15 4.000

20.00 7 120.00 1.21 0.00 1.21 0.94 1.41 1.00 0.95 1.00 9 60.00 5.00 1.20 16 4.000

20.50 7 120.00 1.24 0.00 1.24 0.93 1.41 1.00 0.95 1.00 9 60.00 5.00 1.20 16 4.000

25.00 4 120.00 1.51 0.00 1.51 0.84 1.41 1.00 0.95 1.00 4 15.00 2.50 1.05 7 4.000

30.00 13 120.00 1.81 0.00 1.81 0.75 1.41 1.00 1.00 1.00 14 3.90 0.00 1.00 14 4.000

35.00 23 120.00 2.11 0.00 2.11 0.69 1.41 1.00 1.00 1.00 22 5.00 0.00 1.00 22 0.242

40.00 19 120.00 2.41 0.00 2.41 0.63 1.41 1.00 1.00 1.00 17 5.00 0.00 1.00 17 0.185

45.00 17 120.00 2.71 0.13 2.58 0.60 1.41 1.00 1.00 1.00 14 8.90 0.53 1.02 15 0.163

50.00 45 120.00 3.01 0.29 2.73 0.58 1.41 1.00 1.00 1.00 37 5.00 0.00 1.00 37 4.000

55.00 39 120.00 3.31 0.44 2.87 0.56 1.41 1.00 1.00 1.00 31 5.60 0.01 1.00 31 4.000

60.00 53 120.00 3.61 0.60 3.01 0.54 1.41 1.00 1.00 1.00 41 5.00 0.00 1.00 41 4.000

65.00 38 120.00 3.91 0.76 3.16 0.53 1.41 1.00 1.00 1.00 28 5.00 0.00 1.00 28 0.348

70.00 2 120.00 4.21 0.91 3.30 0.51 1.41 1.00 1.00 1.00 1 80.00 5.00 1.20 6 4.000 Project File: P:\INFOCUS PROJECTS\13501-14000\13867 MTC Yorba Linda\001\Analyses\LiqSV\9-11-24\13867.001_LiqSV_LRM - ev on.lsvs LiqSVs 2.3.2.11 - SPT & Vs Liquefaction Assessment Software Page: 37

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This software is registered to: Leighton Group, Inc
:: Cyclic Resistance Ratio (CRR) calculation data ::

Depth CRR7.5
(ft)
SPT
Field
Value
CN CE CB CR CS (N1)60 Fines α β (N1)60cs
Content
(%)
σv
(tsf)
uo
(tsf)
σ'vo
(tsf)
Unit
Weight
(pcf)

72.50 2 120.00 4.36 0.99 3.37 0.50 1.41 1.00 1.00 1.00 1 31.50 4.80 1.17 6 4.000

75.00 32 120.00 4.51 1.07 3.45 0.49 1.41 1.00 1.00 1.00 22 5.00 0.00 1.00 22 0.242

80.00 37 120.00 4.81 1.22 3.59 0.48 1.41 1.00 1.00 1.00 25 5.00 0.00 1.00 25 0.285

85.00 37 120.00 5.11 1.38 3.73 0.47 1.41 1.00 1.00 1.00 24 5.00 0.00 1.00 24 0.269

90.00 100 120.00 5.41 1.54 3.88 0.45 1.41 1.00 1.00 1.00 64 10.00 0.87 1.02 66 4.000

95.00 100 120.00 5.71 1.69 4.02 0.44 1.41 1.00 1.00 1.00 62 10.00 0.87 1.02 64 4.000 100.00 100 120.00 6.01 1.85 4.17 0.43 1.41 1.00 1.00 1.00 60 10.00 0.87 1.02 62 4.000 σv:
uo:
σ'vo:

CN:

CE:

CB:

CR:

CS:

N1(60):
α, β:

N1(60)cs:

CRR7.5:

Total stress during SPT test (tsf)
Water pore pressure during SPT test (tsf)
Effective overburden pressure during SPT test (tsf)
Overburden corretion factor
Energy correction factor
Borehole diameter correction factor
Rod length correction factor
Liner correction factor
Corrected NSPT to a 60% energy ratio
Clean sand equivalent clean sand formula coefficients
Corected N1(60) value for fines content
Cyclic resistance ratio for M=7.5
Abbreviations
σv,eq
(tsf)
rd CSR MSF CSReq,M=7.5 Ksigma CSR*
:: Cyclic Stress Ratio calculation (CSR fully adjusted and normalized) ::

Depth
(ft)
Unit
Weight
(pcf)
uo,eq
(tsf)
σ'vo,eq
(tsf)
α FS

5.00 125.68 0.31 0.00 0.31 0.99 1.00 0.425 1.35 0.315 1.00 0.315 2.000

10.00 120.00 0.61 0.00 0.61 0.98 1.00 0.420 1.35 0.311 1.00 0.311 2.000

15.00 120.00 0.91 0.00 0.91 0.97 1.00 0.416 1.35 0.308 1.00 0.308 2.000

20.00 120.00 1.21 0.00 1.21 0.96 1.00 0.411 1.35 0.304 0.97 0.313 2.000

20.50 120.00 1.24 0.00 1.24 0.96 1.00 0.410 1.35 0.304 0.97 0.314 2.000

25.00 120.00 1.51 0.00 1.51 0.94 1.00 0.404 1.35 0.299 0.93 0.322 2.000

30.00 120.00 1.81 0.00 1.81 0.92 1.00 0.395 1.35 0.293 0.90 0.326 2.000

35.00 120.00 2.11 0.12 1.99 0.89 1.00 0.406 1.35 0.301 0.88 0.341 0.708

40.00 120.00 2.41 0.28 2.13 0.85 1.00 0.413 1.35 0.306 0.87 0.352 0.525

45.00 120.00 2.71 0.44 2.28 0.80 1.00 0.411 1.35 0.304 0.86 0.355 0.461

50.00 120.00 3.01 0.59 2.42 0.75 1.00 0.402 1.35 0.298 0.85 0.351 2.000

55.00 120.00 3.31 0.75 2.57 0.70 1.00 0.390 1.35 0.289 0.84 0.345 2.000

60.00 120.00 3.61 0.90 2.71 0.66 1.00 0.377 1.35 0.280 0.83 0.337 2.000

65.00 120.00 3.91 1.06 2.85 0.62 1.00 0.366 1.35 0.271 0.82 0.331 1.052

70.00 120.00 4.21 1.22 3.00 0.59 1.00 0.357 1.35 0.265 0.81 0.326 2.000

72.50 120.00 4.36 1.29 3.07 0.58 1.00 0.353 1.35 0.262 0.81 0.324 2.000

75.00 120.00 4.51 1.37 3.14 0.57 1.00 0.350 1.35 0.259 0.80 0.322 0.750

80.00 120.00 4.81 1.53 3.29 0.55 1.00 0.345 1.35 0.255 0.80 0.320 0.890

85.00 120.00 5.11 1.68 3.43 0.53 1.00 0.341 1.35 0.252 0.79 0.319 0.843

90.00 120.00 5.41 1.84 3.57 0.52 1.00 0.338 1.35 0.250 0.78 0.319 2.000

95.00 120.00 5.71 2.00 3.72 0.51 1.00 0.335 1.35 0.248 0.78 0.319 2.000 100.00 120.00 6.01 2.15 3.86 0.50 1.00 0.333 1.35 0.247 0.77 0.320 2.000 Project File: P:\INFOCUS PROJECTS\13501-14000\13867 MTC Yorba Linda\001\Analyses\LiqSV\9-11-24\13867.001_LiqSV_LRM - ev on.lsvs LiqSVs 2.3.2.11 - SPT & Vs Liquefaction Assessment Software Page: 38

Page 722 of 2424 ends

This software is registered to: Leighton Group, Inc
σv,eq
(tsf)
rd CSR MSF CSReq,M=7.5 Ksigma CSR*
:: Cyclic Stress Ratio calculation (CSR fully adjusted and normalized) ::

Depth
(ft)
Unit
Weight
(pcf)
uo,eq
(tsf)
σ'vo,eq
(tsf)
α FS
σv,eq:
uo,eq:
σ'vo,eq:
rd :
α:

CSR :

MSF :

CSReq,M=7.5:

Ksigma:

CSR*:

FS:

Total overburden pressure at test point, during earthquake (tsf) Water pressure at test point, during earthquake (tsf)
Effective overburden pressure, during earthquake (tsf)
Nonlinear shear mass factor
Improvement factor due to stone columns
Cyclic Stress Ratio (adjusted for improvement)
Magnitude Scaling Factor
CSR adjusted for M=7.5
Effective overburden stress factor
CSR fully adjusted (user FS applied)***
Calculated factor of safety against soil liquefaction
Abbreviations

1.00 *** User FS:
:: Liquefaction potential according to Iwasaki ::

Depth
(ft)
FS F Thickness
(ft)
wz IL

5.00 2.000 0.00 9.24 5.00 0.00

10.00 2.000 0.00 8.48 5.00 0.00

15.00 2.000 0.00 7.71 5.00 0.00

20.00 2.000 0.00 6.95 5.00 0.00

20.50 2.000 0.00 6.88 0.50 0.00

25.00 2.000 0.00 6.19 4.50 0.00

30.00 2.000 0.00 5.43 5.00 0.00

35.00 0.708 0.29 4.67 5.00 2.07

40.00 0.525 0.48 3.90 5.00 2.83

45.00 0.461 0.54 3.14 5.00 2.58

50.00 2.000 0.00 2.38 5.00 0.00

55.00 2.000 0.00 1.62 5.00 0.00

60.00 2.000 0.00 0.86 5.00 0.00

65.00 1.052 0.00 0.09 5.00 0.00

70.00 2.000 0.00 0.00 0.00 0.00

72.50 2.000 0.00 0.00 0.00 0.00

75.00 0.750 0.00 0.00 0.00 0.00

80.00 0.890 0.00 0.00 0.00 0.00

85.00 0.843 0.00 0.00 0.00 0.00

90.00 2.000 0.00 0.00 0.00 0.00

95.00 2.000 0.00 0.00 0.00 0.00
100.00 2.000 0.00 0.00 0.00 0.00

7.49 IL = 0.00 - No liquefaction
IL between 0.00 and 5 - Liquefaction not probable
IL between 5 and 15 - Liquefaction probable
IL > 15 - Liquefaction certain
Overall potential IL :
:: Vertical settlements estimation for dry sands ::

Depth
(ft)
(N1)60 τav p Gmax
(tsf)
α b γ
(%)
ε15 Nc εNc
(%)
ΔS
(in)
Δh
(ft)

5.00 14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.00 0.000 Project File: P:\INFOCUS PROJECTS\13501-14000\13867 MTC Yorba Linda\001\Analyses\LiqSV\9-11-24\13867.001_LiqSV_LRM - ev on.lsvs LiqSVs 2.3.2.11 - SPT & Vs Liquefaction Assessment Software Page: 39

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This software is registered to: Leighton Group, Inc
:: Vertical settlements estimation for dry sands ::

Depth
(ft)
(N1)60 τav p Gmax
(tsf)
α b γ
(%)
ε15 Nc εNc
(%)
ΔS
(in)
Δh
(ft)

10.00 4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.00 0.000

15.00 8 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.00 0.000

20.00 9 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.50 0.000

20.50 9 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.50 0.000

25.00 4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.00 0.000

30.00 14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 5.00 0.000 Abbreviations
τav:
p:

Gmax:
α, b:
γ:
ε15:

Nc:
εNc:

Δh:

ΔS:

Average cyclic shear stress
Average stress
Maximum shear modulus (tsf)
Shear strain formula variables
Average shear strain (%)
Volumetric strain after 15 cycles
Number of cycles
Volumetric strain for number of cycles Nc (%)
Thickness of soil layer (in)
Settlement of soil layer (in)
Cumulative settlemetns: 0.000
:: Vertical settlements estimation for saturated sands ::

Depth
(ft)
D50
(in)
qc/N ev
(%)
Δh
(ft)
s
(in)
ev
weight
factor

35.00 0.00 5.00 0.41 0.88 5.00 0.527

40.00 0.00 5.00 0.32 0.86 5.00 0.516

45.00 0.00 5.00 0.24 0.70 5.00 0.421

50.00 0.00 5.00 0.15 0.00 5.00 0.000

55.00 0.00 5.00 0.07 0.00 5.00 0.000

60.00 0.00 5.00 0.00 0.00 5.00 0.000

65.00 0.00 5.00 0.00 0.00 5.00 0.000

70.00 0.00 5.00 0.00 0.00 2.50 0.000

72.50 0.00 5.00 0.00 0.00 2.50 0.000

75.00 0.00 5.00 0.00 0.00 5.00 0.000

80.00 0.00 5.00 0.00 0.00 5.00 0.000

85.00 0.00 5.00 0.00 0.00 5.00 0.000

90.00 0.00 5.00 0.00 0.00 5.00 0.000

95.00 0.00 5.00 0.00 0.00 5.00 0.000
100.00 0.00 5.00 0.00 0.00 1.50 0.000
Abbreviations
Cumulative settlements: 1.464
D50:
qc/N:
ev:

Δh:
s:

Depth
(ft)
(N1)60 Dr
(%)
γmax
(%)
dz
(ft)
LDI LD
(ft)
Project File: P:\INFOCUS PROJECTS\13501-14000\13867 MTC Yorba Linda\001\Analyses\LiqSV\9-11-24\13867.001_LiqSV_LRM - ev on.lsvs LiqSVs 2.3.2.11 - SPT & Vs Liquefaction Assessment Software Page: 40

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This software is registered to: Leighton Group, Inc
:: Lateral displacements estimation for saturated sands ::

Depth
(ft)
(N1)60 Dr
(%)
γmax
(%)
dz
(ft)
LDI LD
(ft)

5.00 14 52.38 0.00 5.00 0.000 0.00

10.00 4 28.00 0.00 5.00 0.000 0.00

15.00 8 39.60 0.00 5.00 0.000 0.00

20.00 9 42.00 0.00 0.50 0.000 0.00

20.50 9 42.00 0.00 4.50 0.000 0.00

25.00 4 28.00 0.00 5.00 0.000 0.00

30.00 14 52.38 0.00 5.00 0.000 0.00

35.00 22 65.67 8.67 5.00 0.000 0.00

40.00 17 57.72 22.70 5.00 0.000 0.00

45.00 14 52.38 34.10 5.00 0.000 0.00

50.00 37 85.16 0.00 5.00 0.000 0.00

55.00 31 77.95 0.00 5.00 0.000 0.00

60.00 41 89.64 0.00 5.00 0.000 0.00

65.00 28 74.08 2.76 5.00 0.000 0.00

70.00 1 14.00 0.00 2.50 0.000 0.00

72.50 1 14.00 0.00 2.50 0.000 0.00

75.00 22 65.67 7.35 5.00 0.000 0.00

80.00 25 70.00 4.48 5.00 0.000 0.00

85.00 24 68.59 5.23 5.00 0.000 0.00

90.00 64 100.00 0.00 5.00 0.000 0.00

95.00 62 100.00 0.00 5.00 0.000 0.00
100.00 60 100.00 0.00 1.50 0.000 0.00

0.00 Abbreviations
Cumulative lateral displacements:

Dr:
γmax:
dz:

LDI:

LD:

Page 725 of 2424 ends

S P T B A S E D L I Q U E F A C T I O N A N A L Y S I S R E P O R T :: Input parameters and analysis properties ::

Analysis method:

Fines correction method:

Sampling method:

Borehole diameter:

Rod length:

Hammer energy ratio:

NCEER 1998
NCEER 1998
Standard Sampler
65mm to 115mm

3.30 ft

1.46 G.W.T. (in-situ):

G.W.T. (earthq.):

Earthquake magnitude Mw:

Peak ground acceleration:

Eq. external load:

Project title : Yorba Linda Widening
Location :

SPT Name: LB-9

50.00 ft

20.00 ft

6.67 0.66 g

0.00 tsf
Raw SPT Data
SPT Count (blows/ft)
50403020100
Depth (ft)
40 38
36 34
32 30
28 26
24 22
20 18
16 14
12 10
8 6
4 Raw SPT Data
Insitu
CSR - CRR Plot

CSR - CRR

10.80.60.40.20 Depth (ft)
40 38
36 34
32 30
28 26
24 22
20 18
16 14
12 10
8 6
CSR - CRR Plot
During earthq.

FS Plot
Factor of Safety

21.510.50
Depth (ft)
40 38
36 34
32 30
28 26
24 22
20 18
16 14
12 10
8 6
FS Plot
During earthq.

LPI
Liquefaction potential
0 Depth (ft)
40 38
36 34
32 30
28 26
24 22
20 18
16 14
12 10
8 6
LPI
During earthq.

CRR 7.50 clean sand curve
Corrected Blow Count N1(60),cs
1050 15 20 25 30 35 40 45 50
Cyclic Stress Ratio*

0.8 0.7

0.6 0.5

0.4 0.3

0.2 0.1

Page 726 of 2424 ends

This software is registered to: Leighton Group, Inc
Raw SPT Data
SPT Count (blows/ft)
50403020100
Depth (ft)
41 40
39 38
37 36
35 34
33 32
31 30
29 28
27 26
25 24
23 22
21 20
19 18
17 16
15 14
13 12
11 10
9 8
7 6
5 4
Raw SPT Data
Insitu
CSR - CRR Plot

CSR - CRR

10.80.60.40.20 Depth (ft)
40 39
38 37
36 35
34 33
32 31
30 29
28 27
26 25
24 23
22 21
20 19
18 17
16 15
14 13
12 11
10 9
8 7
6 5
CSR - CRR Plot
During earthq.

FS Plot
Factor of Safety
0 0.5 1 1.5 2
Depth (ft)
40 39
38 37
36 35
34 33
32 31
30 29
28 27
26 25
24 23
22 21
20 19
18 17
16 15
14 13
12 11
10 9
8 7
6 5
FS Plot
During earthq.

Vertical Liq. Settlements
Cuml. Settlement (in)
0 0.2 0.4 0.6
Depth (ft)
40 39
38 37
36 35
34 33
32 31
30 29
28 27
26 25
24 23
22 21
20 19
18 17
16 15
14 13
12 11
10 9
8 7
6 5
Vertical Liq. Settlements
During earthq.

Lateral Liq. Displacements
Cuml. Displacement (ft)
0 Depth (ft)
40 39
38 37
36 35
34 33
32 31
30 29
28 27
26 25
24 23
22 21
20 19
18 17
16 15
14 13
12 11
10 9
8 7
6 5
Lateral Liq. Displacements
During earthq.
:: Overall Liquefaction Assessment Analysis Plots ::

Project File: P:\INFOCUS PROJECTS\13501-14000\13867 MTC Yorba Linda\001\Analyses\LiqSV\9-11-24\13867.001_LiqSV_LRM - ev on.lsvs LiqSVs 2.3.2.11 - SPT & Vs Liquefaction Assessment Software Page: 43

Page 727 of 2424 ends

This software is registered to: Leighton Group, Inc
Test
Depth
(ft)
:: Field input data ::

SPT Field
Value
(blows)
Fines
Content
(%)
Unit
Weight
(pcf)
Infl.

Thickness
(ft)
Can
Liquefy

5.00 16 25.00 132.80 5.00 Yes

10.00 14 60.00 120.00 5.00 Yes

15.00 12 21.00 132.40 1.30 Yes

16.25 12 5.00 120.00 3.80 Yes

20.00 56 5.00 120.00 5.00 Yes

25.00 100 5.00 120.00 5.00 Yes

30.00 100 5.00 120.00 5.00 Yes

35.00 100 60.00 120.00 1.00 Yes

36.00 100 5.00 120.00 4.00 Yes

40.00 100 10.00 120.00 1.50 Yes
Abbreviations
Depth:

SPT Field Value:

Fines Content:

Unit Weight:

Infl. Thickness:

Can Liquefy:

Depth CRR7.5
(ft)
SPT
Field
Value
CN CE CB CR CS (N1)60 Fines α β (N1)60cs
Content
(%)
σv
(tsf)
uo
(tsf)
σ'vo
(tsf)
Unit
Weight
(pcf)

5.00 16 132.80 0.33 0.00 0.33 1.45 1.46 1.00 0.75 1.00 25 25.00 4.29 1.11 32 4.000

10.00 14 120.00 0.63 0.00 0.63 1.22 1.46 1.00 0.85 1.00 21 60.00 5.00 1.20 30 4.000

15.00 12 132.40 0.96 0.00 0.96 1.04 1.46 1.00 0.85 1.00 16 21.00 3.78 1.09 21 4.000

16.25 12 120.00 1.04 0.00 1.04 1.01 1.46 1.00 0.85 1.00 15 5.00 0.00 1.00 15 4.000

20.00 56 120.00 1.26 0.00 1.26 0.92 1.46 1.00 0.95 1.00 71 5.00 0.00 1.00 71 4.000

25.00 100 120.00 1.56 0.00 1.56 0.82 1.46 1.00 0.95 1.00 114 5.00 0.00 1.00 114 4.000

30.00 100 120.00 1.86 0.00 1.86 0.74 1.46 1.00 1.00 1.00 108 5.00 0.00 1.00 108 4.000

35.00 100 120.00 2.16 0.00 2.16 0.68 1.46 1.00 1.00 1.00 99 60.00 5.00 1.20 124 4.000

36.00 100 120.00 2.22 0.00 2.22 0.67 1.46 1.00 1.00 1.00 97 5.00 0.00 1.00 97 4.000

40.00 100 120.00 2.46 0.00 2.46 0.62 1.46 1.00 1.00 1.00 91 10.00 0.87 1.02 94 4.000 σv:
uo:
σ'vo:

CN:

CE:

CB:

CR:

CS:

N1(60):
α, β:

N1(60)cs:

CRR7.5:

Depth
(ft)
Unit
Weight
(pcf)
uo,eq
(tsf)
σ'vo,eq
(tsf)
α FS

5.00 132.80 0.33 0.00 0.33 0.99 1.00 0.425 1.35 0.315 1.00 0.315 2.000

10.00 120.00 0.63 0.00 0.63 0.98 1.00 0.420 1.35 0.311 1.00 0.311 2.000 Project File: P:\INFOCUS PROJECTS\13501-14000\13867 MTC Yorba Linda\001\Analyses\LiqSV\9-11-24\13867.001_LiqSV_LRM - ev on.lsvs LiqSVs 2.3.2.11 - SPT & Vs Liquefaction Assessment Software Page: 44

Page 728 of 2424 ends

This software is registered to: Leighton Group, Inc
σv,eq
(tsf)
rd CSR MSF CSReq,M=7.5 Ksigma CSR*
:: Cyclic Stress Ratio calculation (CSR fully adjusted and normalized) ::

Depth
(ft)
Unit
Weight
(pcf)
uo,eq
(tsf)
σ'vo,eq
(tsf)
α FS

15.00 132.40 0.96 0.00 0.96 0.97 1.00 0.416 1.35 0.308 1.00 0.308 2.000

16.25 120.00 1.04 0.00 1.04 0.97 1.00 0.414 1.35 0.307 1.00 0.307 2.000

20.00 120.00 1.26 0.00 1.26 0.96 1.00 0.411 1.35 0.304 0.97 0.315 2.000

25.00 120.00 1.56 0.16 1.41 0.94 1.00 0.449 1.35 0.333 0.94 0.352 2.000

30.00 120.00 1.86 0.31 1.55 0.92 1.00 0.474 1.35 0.351 0.93 0.379 2.000

35.00 120.00 2.16 0.47 1.70 0.89 1.00 0.488 1.35 0.361 0.91 0.397 2.000

36.00 120.00 2.22 0.50 1.72 0.88 1.00 0.489 1.35 0.362 0.91 0.399 2.000

40.00 120.00 2.46 0.62 1.84 0.85 1.00 0.489 1.35 0.362 0.90 0.405 2.000 σv,eq:
uo,eq:
σ'vo,eq:
rd :
α:

CSR :

MSF :

CSReq,M=7.5:

Ksigma:

CSR*:

FS:

1.00 *** User FS:
:: Liquefaction potential according to Iwasaki ::

Depth
(ft)
FS F Thickness
(ft)
wz IL

5.00 2.000 0.00 9.24 5.00 0.00

10.00 2.000 0.00 8.48 5.00 0.00

15.00 2.000 0.00 7.71 5.00 0.00

16.25 2.000 0.00 7.52 1.25 0.00

20.00 2.000 0.00 6.95 3.75 0.00

25.00 2.000 0.00 6.19 5.00 0.00

30.00 2.000 0.00 5.43 5.00 0.00

35.00 2.000 0.00 4.67 5.00 0.00

36.00 2.000 0.00 4.51 1.00 0.00

40.00 2.000 0.00 3.90 4.00 0.00

0.00 IL = 0.00 - No liquefaction
IL between 0.00 and 5 - Liquefaction not probable
IL between 5 and 15 - Liquefaction probable
IL > 15 - Liquefaction certain
Overall potential IL :
:: Vertical settlements estimation for dry sands ::

Depth
(ft)
(N1)60 τav p Gmax
(tsf)
α b γ
(%)
ε15 Nc εNc
(%)
ΔS
(in)
Δh
(ft)

5.00 25 0.14 0.22 616.44 0.13 15770.75 0.12 0.00 8.42 0.07 5.00 0.084

10.00 21 0.27 0.42 802.50 0.14 10717.78 0.17 0.00 8.42 0.12 5.00 0.149

15.00 16 0.40 0.65 904.76 0.15 8324.52 0.27 0.00 8.42 0.27 1.30 0.084

16.25 15 0.43 0.70 919.34 0.15 7958.23 0.29 0.00 8.42 0.32 3.80 0.293 Project File: P:\INFOCUS PROJECTS\13501-14000\13867 MTC Yorba Linda\001\Analyses\LiqSV\9-11-24\13867.001_LiqSV_LRM - ev on.lsvs LiqSVs 2.3.2.11 - SPT & Vs Liquefaction Assessment Software Page: 45

Page 729 of 2424 ends

This software is registered to: Leighton Group, Inc
:: Vertical settlements estimation for dry sands ::

Depth
(ft)
(N1)60 τav p Gmax
(tsf)
α b γ
(%)
ε15 Nc εNc
(%)
ΔS
(in)
Δh
(ft)
Abbreviations
τav:
p:

Gmax:
α, b:
γ:
ε15:

Nc:
εNc:

Δh:

ΔS:

Average cyclic shear stress
Average stress
Maximum shear modulus (tsf)
Shear strain formula variables
Average shear strain (%)
Volumetric strain after 15 cycles
Number of cycles
Volumetric strain for number of cycles Nc (%)
Thickness of soil layer (in)
Settlement of soil layer (in)
Cumulative settlemetns: 0.610
:: Vertical settlements estimation for saturated sands ::

Depth
(ft)
D50
(in)
qc/N ev
(%)
Δh
(ft)
s
(in)
ev
weight
factor

20.00 0.00 5.00 0.66 0.00 5.00 0.000

25.00 0.00 5.00 0.58 0.00 5.00 0.000

30.00 0.00 5.00 0.49 0.00 5.00 0.000

35.00 0.00 5.00 0.41 0.00 1.00 0.000

36.00 0.00 5.00 0.39 0.00 4.00 0.000

40.00 0.00 5.00 0.32 0.00 1.50 0.000
Abbreviations
Cumulative settlements: 0.000
D50:
qc/N:
ev:

Δh:
s:

Depth
(ft)
(N1)60 Dr
(%)
γmax
(%)
dz
(ft)
LDI LD
(ft)

5.00 25 70.00 0.00 5.00 0.000 0.00

10.00 21 64.16 0.00 5.00 0.000 0.00

15.00 16 56.00 0.00 1.30 0.000 0.00

16.25 15 54.22 0.00 3.80 0.000 0.00

20.00 71 100.00 0.00 5.00 0.000 0.00

25.00 114 100.00 0.00 5.00 0.000 0.00

30.00 108 100.00 0.00 5.00 0.000 0.00

35.00 99 100.00 0.00 1.00 0.000 0.00

36.00 97 100.00 0.00 4.00 0.000 0.00

40.00 91 100.00 0.00 1.50 0.000 0.00
Project File: P:\INFOCUS PROJECTS\13501-14000\13867 MTC Yorba Linda\001\Analyses\LiqSV\9-11-24\13867.001_LiqSV_LRM - ev on.lsvs LiqSVs 2.3.2.11 - SPT & Vs Liquefaction Assessment Software Page: 46

Page 730 of 2424 ends

This software is registered to: Leighton Group, Inc
:: Lateral displacements estimation for saturated sands ::

Depth
(ft)
(N1)60 Dr
(%)
γmax
(%)
dz
(ft)
LDI LD
(ft)

0.00 Abbreviations
Cumulative lateral displacements:

Dr:
γmax:
dz:

LDI:

LD:

Page 731 of 2424 ends

References
⦁ Ronald D. Andrus, Hossein Hayati, Nisha P. Mohanan, 2009. Correcting Liquefaction Resistance for Aged Sands Using Measured to Estimated Velocity Ratio, Journal of Geotechnical and Geoenvironmental Engineering, Vol. 135, No. 6, June 1 ⦁ Boulanger, R.W. and Idriss, I. M., 2014. CPT AND SPT BASED LIQUEFACTION TRIGGERING PROCEDURES. DEPARTMENT OF

CIVIL & ENVIRONMENTAL ENGINEERING COLLEGE OF ENGINEERING UNIVERSITY OF CALIFORNIA AT DAVIS ⦁ Dipl.-Ing. Heinz J. Priebe, Vibro Replacement to Prevent Earthquake Induced Liquefaction, Proceedings of the GeotechniqueColloquium at Darmstadt, Germany, on March 19th, 1998 (also published in Ground Engineering, September 1998), Technical paper 12-57E
⦁ Robertson, P.K. and Cabal, K.L., 2007, Guide to Cone Penetration Testing for Geotechnical Engineering. Available at no cost at http://www.geologismiki.gr/
⦁ Youd, T.L., Idriss, I.M., Andrus, R.D., Arango, I., Castro, G., Christian, J.T., Dobry, R., Finn, W.D.L., Harder, L.F., Hynes, M.E., Ishihara, K., Koester, J., Liao, S., Marcuson III, W.F., Martin, G.R., Mitchell, J.K., Moriwaki, Y., Power, M.S., Robertson, P.K., Seed, R., and Stokoe, K.H., Liquefaction Resistance of Soils: Summary Report from the 1996 NCEER and 1998 NCEER/NSF Workshop on Evaluation of Liquefaction Resistance of Soils, ASCE, Journal of Geotechnical & Geoenvironmental Engineering, Vol. 127, October, pp 817-833
⦁ Zhang, G., Robertson. P.K., Brachman, R., 2002, Estimating Liquefaction Induced Ground Settlements from the CPT, Canadian Geotechnical Journal, 39: pp 1168-1180
⦁ Zhang, G., Robertson. P.K., Brachman, R., 2004, Estimating Liquefaction Induced Lateral Displacements using the SPT and CPT, ASCE, Journal of Geotechnical & Geoenvironmental Engineering, Vol. 130, No. 8, 861-871 ⦁ Pradel, D., 1998, Procedure to Evaluate Earthquake-Induced Settlements in Dry Sandy Soils, ASCE, Journal of Geotechnical & Geoenvironmental Engineering, Vol. 124, No. 4, 364-368
⦁ R. Kayen, R. E. S. Moss, E. M. Thompson, R. B. Seed, K. O. Cetin, A. Der Kiureghian, Y. Tanaka, K. Tokimatsu, 2013. ShearWave Velocity–Based Probabilistic and Deterministic Assessment of Seismic Soil Liquefaction Potential, Journal of Geotechnical and Geoenvironmental Engineering, Vol. 139, No. 3, March 1 LiqSVs 2.3.2.11 - SPT & Vs Liquefaction Assessment SoftwarePage 732 of 2424 Attachment F Page 733 of 2424

PHASE I

INITIAL SITE ASSESSMENT
Savi Ranch Parkway Widening/
Connect Savi Ranch Project
Yorba Linda, California
Federal Project No. STPCML-5402(034)
Prepared in General Accordance with:

ASTM E 1527-21 Standard Practice for Environmental Site Assessments For:

CALIFORNIA DEPARTMENT OF TRANSPORTATION-DISTRICT 12
1750 E. 4th Street, Suite 100
Santa Ana, CA 92705
By:
5 Hutton Centre Drive, Suite 500
Santa Ana, California 92707
October 2, 2025
JN 204674

Page 734 of 2424 ends

5 Hutton Centre Drive, Suite 500 | Santa Ana, CA 92707
MBAKERINTL.COM Office: 949.472.3505 | Fax: 949.472.8373 October 2, 2025 JN 204674

CALIFORNIA DEPARTMENT OF TRANSPORTATION
DISTRICT 12
1750 E. 4th Street, Suite 100
Santa Ana, CA 92705
SUBJECT: Phase I Initial Site Assessment for the Savi Ranch Parkway Widening/ Connect Savi Ranch Project located in the City of Yorba Linda, California To Whom It May Concern:

Michael Baker International (Michael Baker), is pleased to submit this Phase I Initial Site Assessment (ISA) for the above referenced project, herein referenced as the “subject site.” The goal of this Phase I ISA is to identify recognized environmental conditions (RECs) associated with the subject site. This Phase I ISA has been prepared for the sole use of the California Department of Transportation-District 12 and the City of Yorba Linda for the above-referenced subject site.

Neither this Phase I ISA, nor any of the information contained herein, shall be used or relied upon for any purpose by any person or entity other than the California Department of TransportationDistrict 12 and the City of Yorba Linda.

The Phase I ISA was prepared using methods consistent with the ASTM International (ASTM) E 1527-21 Standard Practice for Environmental Site Assessments, the California Department of Transportation’s Standard Environmental Reference (SER), the scope of services, and inherent limitations presented in our proposal. The Phase I ISA is not intended to present specific quantitative information as to the actual presence of hazardous substances on or adjacent to the subject site, but is to identify RECs based on available information.

Should you or your staff have any questions or concerns after reviewing the enclosed report, please do not hesitate to contact me at 949/855-5747.

Sincerely,
Kristen Bogue
Environmental Professional
Planning/Environmental Services

Page 735 of 2424 ends

STATEMENT OF ENVIRONMENTAL PROFESSIONAL
I [We] declare that, to the best of my [our] professional knowledge and belief, I[we] meet the definition of Environmental Professional as defined in §312.10 of Title 40, Code of Federal Regulations (CFR) 312 and I[we] have the specific qualifications based on education, training, and experience to assess a property of the nature, history, and setting of the subject property. I[we] have developed and performed all appropriate inquiries in conformance with the standards and practices set forth in 40 CFR Part 312.
____________________________________
Signature of Michael Baker Environmental Professional
Kristen Bogue

Page 736 of 2424 ends

Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | i

TABLE OF CONTENTS
Executive Summary .............................................................................................................................. E-1 Section 1.0 Introduction ..................................................................................................................1-1

1.1 Project Description...........................................................................................1-8

1.2 Purpose of the Phase I ISA............................................................................1-13

1.3 Detailed Scope of Services ............................................................................1-13

1.4 Significant Assumptions ...............................................................................1-14

1.5 Limitations, Deviations, and Exceptions ....................................................1-14

1.6 User Responsibilities .....................................................................................1-15

1.7 Special Terms and Conditions .....................................................................1-19

1.8 User Reliance ..................................................................................................1-19 Section 2.0 User Provided Information ........................................................................................2-1

2.1 Previous Documents........................................................................................2-1

2.2 Litigation/Administrative Proceedings .......................................................2-1

2.3 Governmental Notices.....................................................................................2-2

2.4 Environmental Liens .......................................................................................2-2

2.5 Activity and Use Limitations .........................................................................2-2

2.6 Specialized Knowledge or Experience..........................................................2-2

2.7 Commonly Known or Reasonably Ascertainable Information.................2-2

2.8 Valuation Reduction for Environmental Issues...........................................2-2

2.9 Degree of Obviousness....................................................................................2-2

2.10 Reason for Performing Phase I.......................................................................2-3 Section 3.0 Records Review............................................................................................................3-1

3.1 Physical Setting Sources..................................................................................3-1

3.2 Standard Environmental Records Sources...................................................3-7

3.3 File Record Reviews ......................................................................................3-14

3.4 Historical Use Information
on the Subject Site and Adjoining Properties.............................................3-19 Section 4.0 Site Reconnaissance ....................................................................................................4-1

4.1 Methodology and Limiting Conditions........................................................4-1

4.2 On-Site Observations.......................................................................................4-1

4.3 Off-Site Observations ......................................................................................4-8

Page 737 of 2424 ends

Table of Contents
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | ii Section 5.0 Interviews......................................................................................................................5-1

5.1 Property Owner ...............................................................................................5-1

5.2 Key Site Manager/Operator...........................................................................5-1

5.3 Occupants..........................................................................................................5-2

5.4 Local Government Officials............................................................................5-2

5.5 Other Persons ...................................................................................................5-3 Section 6.0 Evaluation......................................................................................................................6-1

6.1 Findings and Opinions....................................................................................6-1

6.2 Conclusions.....................................................................................................6-15

6.3 Recommendations .........................................................................................6-15

6.4 Limiting Conditions/Deviations .................................................................6-16 Section 7.0 References .....................................................................................................................7-1 List of Exhibits

1. Regional Vicinity..............................................................................................1-2

2. Site Vicinity.......................................................................................................1-3

3. Subject Site ........................................................................................................1-4 4a. Conceptual Site Plan – Savi Ranch Parkway Widening.............................1-5 4b. Conceptual Site Plan – Multi-Use Trail Improvements..............................1-6

5. Existing and Proposed Right-of-Way ...........................................................1-7

6. Overview Map..................................................................................................3-8

7. On-Site Photographs .......................................................................................4-2

8. Off-Site Photographs .......................................................................................4-3 List of Tables
E-1. Phase I ISA Findings, Opinions, and Conclusions................................... ES-1 1-1. Proposed ROW Acquisition Areas ..............................................................1-12 1-2. Groundwater Plume Dimension Assumptions .........................................1-14 3-1. Database Summaries .......................................................................................3-9 3-2. Identified Regulatory Sites of Concern.......................................................3-11 3-3 Historical Uses Summary .............................................................................3-22 3-4 Proposed ROW Acquisition Areas
Land Use Designations and Zoning............................................................3-26 6-1 Proposed ROW Acquisition Areas
Findings and Opinions..................................................................................6-12

Page 738 of 2424 ends

Table of Contents
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | iii Appendices
Appendix A: ASTM Terminology
Appendix B: Database Records Searches
Appendix C: Documentation
Appendix D: ISA Checklist
Appendix E: Qualifications of the Environmental Professional

Page 739 of 2424 ends

Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | iv

LIST OF ACRONYMS
AAI All Appropriate Inquiries
ACM asbestos-containing materials
APN Assessor’s Parcel Number
AST Aboveground Storage Tank
AULs activity and use limitations
CalGEM California Department of Conservation, Geologic Energy Management Division (formerly DOGGR)
Caltrans California Department of Transportation
CERCLA Comprehensive Environmental Response, Compensation, and Liability Act CFR Code of Federal Regulations
DTSC Department of Toxic Substances Control
EDR Environmental Data Resources
EC engineering control
EPA United States Environmental Protection Agency
EPCRA Emergency Planning and Community Right to Know Act (also known as SARA Title III), 42 U.S.C. §§ 11001-11050 et seq.)
ERNS emergency response notification system
ESA environmental site assessment
FEMA Federal Emergency Management Agency
FIRMette Flood Insurance Rate Map
FR Federal Register
HREC historical recognized environmental condition
IC Institutional Control
LBP lead-based paints
LLP Landowner Liability Protection under the Brownfields Amendments LUFT Leaking Underground Fuel Tank
LUST Leaking Underground Storage Tank
MSDS Material Safety Data Sheet
msl mean sea level
NCP National Contingency Plan
NFRAP sites where no further remedial action is planned under CERCLA NPDES National Pollutant Discharge Elimination System
NPL National Priorities List
PAHs Polynuclear Aromatic Hydrocarbon
PCBs polychlorinated biphenyls

Page 740 of 2424 ends

List of Acronyms
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | v pCi/L Picocuries per liter
POLs petroleum, oil and lubricants
REC recognized environmental condition
RCRA Resource Conservation and Recovery Act (as amended, 42 U.S.C. §§6901 et seq.) RWQCB Regional Water Quality Control Board
SBBM San Bernardino Base and Meridian
SCS Soil Conservation Service
SEMS Standardized Emergency Management System
TPH total petroleum hydrocarbons
TRI Toxics Release Inventory
USC United States Code
USDA United States Department of Agriculture
USGS United States Geological Survey
UST Underground Storage Tank

Page 741 of 2424 ends

Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | ES-1

EXECUTIVE SUMMARY
The Savi Ranch Parkway Widening/Connect Savi Ranch Project site (herein referenced as the “subject site”) is situated in the southeastern portion of the City of Yorba Linda (City), along the border between the cities of Yorba Linda and Anaheim, in the County of Orange; refer to Exhibit 1, Regional Vicinity. The proposed roadway improvements would be located on Savi Ranch Parkway between Yorba Linda Boulevard and Mirage Street, on Mirage Street between Crystal Drive and Old Canal Road, and on Yorba Linda Boulevard from Savi Ranch Parkway to approximately 480 feet south of Savi Ranch Parkway; refer to Exhibit 2, Site Vicinity, and Exhibit 3, Subject Site. The proposed multi-use trail would extend along Savi Ranch Parkway to Mirage Street, to Old Canal Road, and terminate at the intersection of Old Canal Road and Eastpark Drive. The subject site is located within Savi Ranch. Surrounding land uses of the subject site include commercial, industrial, residential, open space/recreation, and transportation uses.

This Phase I ISA was conducted in accordance with the ASTM International (ASTM) E 1527-21 Standard Practice for Environmental Site Assessments (Standard Practice) and satisfies the requirements of 40 Code of Federal Regulations (CFR) Part 312 titled Standards and Practices for All Appropriate Inquiries, as required under Section 101(35)(B)(ii) and (iii) of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). The purpose of conducting this Phase I ISA is to identify Recognized Environmental Conditions (RECs).

FINDINGS AND OPINIONS
Michael Baker International’s (Michael Baker’s) findings and opinions are based upon a review of reasonably ascertainable referenced material available during the preparation of this Phase I ISA, which included a review of historical aerial photographs, historical topographic maps, regulatory databases, and other documentation, as well as interviews and site reconnaissance.

Table E-1, Phase I ISA Findings, Opinions, and Conclusions, summarizes Michael Baker’s findings, opinions, and conclusions made during the preparation of this Phase I ISA.

Table E-1
Phase I ISA Findings, Opinions, and Conclusions
Finding Opinion Conclusion1
Current On-Site Uses
Existing Roadway Uses
Polychlorinated Biphenyls (PCBs). PCBs could be associated with transformers. No transformers are observed within project boundary during the May 7, 2025 site visit. As no transformers are located on-site, it is Michael Baker’s opinion that no REC has resulted in this regard.

No REC

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Lead-Based Paints (LBPs) Associated With Traffic Striping Materials. LBPs were commonly used in traffic striping materials before the discontinued use of lead chromate pigment in traffic striping/marking materials and hot-melt Thermoplastic stripe materials (discontinued in 1997 and 2006, respectively).

Michael Baker observed traffic striping along on-site roadways during the May 7, 2025 site visit. Traffic striping materials appear to be in fair condition and relatively recently resurfaced/stripped (March 2023), and there was no evidence to suggest a release. Thus, it is Michael Baker’s opinion that no REC has resulted.

No REC
Past On-Site Uses
Past Agricultural Uses
Based upon evaluation of the documented land use as demonstrated in the reviewed resources, the series of historical aerial photographs and maps, and the site inspection, majority of the adjoining uses appears to have been historically utilized for agricultural purposes (from prior to 1938 through the 1970’s, possibly up to 1985), by 1985, the subject site and surrounding properties were graded. Based on the year of former agricultural activities, a combination of several commonly used pesticides (i.e., DDD, DDT, DDE), which are now banned, may have been used throughout the property. The historical use of agricultural pesticides may have resulted in pesticide residues of certain persistence in soil at concentrations that are considered to be hazardous based on established federal regulatory levels. The primary concern with historical pesticide residues is human health risk from inadvertent ingestion of contaminated soil, particularly by children. The presence of moderately elevated pesticide residuals in soil presents potential health and marketplace concerns.

Given the years of past agricultural use (1940s through the 1960s), pesticide residues of certain persistence in soil could be of concern in on-site soils.

However, this property was heavily graded in the 1980s and then developed with the existing on-site commercial uses and roadways. As such, it is unlikely that elevated concentrations of pesticide residues in soil from past agricultural use remain. Further, there is no evidence that these former agricultural uses did not use good customary practices. As such, it is the opinion of Michael Baker that residual pesticides are a de minimis condition, if any, and no REC has resulted in this regard.

No REC
(de minimis)
Past Roadway Uses
Aerially Deposited Lead (ADL). ADL refers to lead deposited on highway shoulders from past leaded fuel vehicle emissions. According to the Caltrans ADL webpage (Caltrans 2014), although leaded fuel has been prohibited in California since the 1980’s, ADL may still be present in soils adjacent to highways in use prior to that time.

The project site has encompassed the on-site roadways since the 1980s, other than Yorba Linda Boulevard, which has been present as early as 1938, if not No REC
(de minimis)

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older. However, these roadways do not appear to have been heavily traveled until after the 1980s. Therefore, the potential for elevated levels of aerially deposited lead contamination from vehicle exhaust to exist within soils along on-site roadways is unlikely. It is the opinion of Michael Baker that ADL is a de minimis condition and has not resulted in a REC on the subject site.

Current Adjoining Properties
Current Adjoining
Properties associated with
areas of ROW acquisition
Staples at APN 352-112-03 (5511 Mirage Street). Proposed partial ROW acquisition of parcel with APN 316-160-002 includes the acquisition of landscaping and/or paved areas for commercial use (Staples) on the site.

Based on a review of historical documentation, commercial structure and associated surface parking lot at this site were developed by 1994. Staples has been listed at this address (5511 Mirage Street) since 2005. Based on EDR, this facility is reported for the storage, bulking, and/or transfer of typical retail waste (waste from returned and/or broken retail items) off-site without treatment/recovery generates waste from consumer product returns and broken items. Based on available records, no releases to soil, soil gas, or groundwater from this existing commercial use were recorded. As no evidence of a release was noted, it is the opinion of Michael Baker that no REC has resulted from the current commercial use on this site.

No REC
PetSmart at APN 352-112-04 (5521 Mirage Street). Proposed partial ROW acquisition of parcel with APN 352-112-04 includes the acquisition of landscaping and/or paved areas for commercial use (PetSmart) on the site.

Based on EDR, the current occupant, PetSmart, is reported for the storage, bulking, and/or transfer of typical retail waste (waste from returned and/or broken retail items) off-site without treatment/recovery. Hazardous waste containers were stored closed and properly labeled. No indications of illegal disposal was observed. Based on available records, no releases to soil, soil gas, or groundwater from this existing commercial use were recorded. As no evidence of a release was noted, it is the opinion of Michael Baker that no REC has resulted from the current commercial use on this site.

No REC
Surface Parking Lot at APN 352-113-01 (No Address). Proposed partial ROW acquisition of parcel with APN 352-113-01 includes the acquisition of landscaping and/or paved areas, as well as existing surface parking lot serving the adjoining commercial use (Sprouts).

Based on a review of historical documentation, this surface parking lot were developed by 2002. Based on the information reviewed as part of this Phase I ISA, there are no indications that this surface parking lot use handled/stored/transported hazardous materials in reportable quantities. It is the opinion of Michael Baker that this land use has not resulted in a REC at the time of this Phase I ISA.

No REC
Sprouts at APN 352-113-02 (22401 Old Canal Road). Proposed partial ROW acquisition of parcel with APN 352-113-02 includes the acquisition of landscaping and/or paved areas for commercial use (Sprouts) on the site.

Based on a review of historical documentation, this existing use (Sprouts Farmers Market) has been listed under this address since 2014. Based on EDR, this facility is reported for the storage, bulking, and/or transfer of typical retail waste (waste from returned and/or broken retail items) off-site without treatment/recovery generates waste from consumer product returns and broken items. Several administrative violations were reported, mostly related to hazardous materials documentation. Based on available records, no releases to soil, soil gas, or groundwater from this existing commercial use were recorded. As no evidence of a release was noted, it is the opinion of No REC

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Michael Baker that no REC has resulted from the current commercial use on this site.

Taco Bell at APNs 352-117-01, -02, and -03 (22300 Old Canal Road).

Proposed partial ROW acquisition of parcel with APNs 352-117-01, -02, and - 03 includes the acquisition of landscaping and/or paved areas for off-site commercial use (Taco Bell).

Based on the information reviewed as part of this Phase I ISA, there are no indications that this commercial restaurant use handled/stored/transported hazardous materials in reportable quantities. It is the opinion of Michael Baker that this commercial use has not resulted in a REC at the time of this Phase I ISA.

No REC
Other Current Adjoining
Commercial Uses
Costco Wholesale #445 (Gas Station) (5500 Mirage Street). This facility adjoins the site to the northeast (east of Mirage Street near the northern terminus of the subject site). This facility is identified as the Costco gasoline service station in use since 2014. Four double-walled underground storage tanks (USTs) were reported to be installed at this site in 2014. Based on UST FINDER, these USTs contain regular and premium unleaded petroleum as well as other types of petroleum. This site was also reported to store a 55-gallon drum of waste gasoline and a 55-gallon drum of waste gasoline debris in October 2024. In 2019, this facility was reported on CERS for failure to keep water out of the secondary containment of UST systems as the turbine sump was observed with approximately half gallon of fuel; this site has returned to compliance on October 30, 2019. In 2023, this facility was reported on CERS due to the spill bucket, for the fuel additive, failed initial testing; this site has returned to compliance on October 12, 2023. Several other administrative violations were reported, mostly related to hazardous materials documentation. No release, other than minor releases to secondary containment that were brought to compliance, were reported.

Relationship to the Subject Site
Based on the information reviewed as part of this Phase I ISA, the USTs at this facility appear to be situated approximately 107 feet north and east from the subject site and greater than 360 feet down gradient from proposed areas of excavation and drilling activities. Based on available records, there is no evidence to suggest a past release to soil, soil gas, or groundwater has occurred on this site. As there is no history of release and existing USTs are located down-gradient and over 100 feet from the subject site and greater than 360 feet from areas of excavation/drilling (refer to Table 1-2), this adjoining use does not present a concern to soil, soil gas, and/or groundwater at the subject site. It is the opinion of Michael Baker that no REC has resulted.

No REC
Costco Wholesale #445 (22633 Savi Ranch Parkway). This facility adjoins the site to the northeast (east of Mirage Street near the northern terminus of the subject site). This facility is identified as General Merchandise Stores. This facility was reported as a small quantity generator handling non-RCRA hazardous liquid (water-based products), potentially waste from consumer product returns, as well as metal sludge, possibly from handling lead acid batteries. This property is also reported for the storage, bulking, and/or transfer of off-specification, aged or surplus organics off site. Several administrative violations were reported, related to hazardous materials documentation. No releases were reported.

Relationship to the Subject Site
No REC

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Based on the information reviewed as part of this Phase I ISA, this off-site property has not resulted in a release of hazardous materials to the soil, soil gas, and/or groundwater. As such, it is the opinion of Michael Baker that no REC has resulted in this regard.

Aero Mobility Inc / Weir Canyon Chevrolet (1001 North Weir Canyon Boulevard). This facility adjoins the subject site to the west across Yorba Linda Boulevard. This site has been an automobile dealership with related service bays since at least 2005. Based on EDR, this facility was a Chevrolet dealership from 2005 to 2009; Aero Mobility Inc. (also an automobile dealership) is the current occupant and has reported as a handler, not a generator, of non-RCRA hazardous waste solid (oily solid waste/used metal oil filters) since 2019. Automobile services usually involve the storage and handling of hazardous materials related to automotive maintenance activities.

Based on EDR database listings, the previous occupant Chevrolet was reported the presence of a 1,660-gallon aboveground storage tank (AST). No violations were reported for the Chevrolet listing; however, several administrative violations were reported under Aero Mobility Inc pertaining to maintenance of documentation. No releases were reported in association with this property.

Relationship to the Subject Site
Based on the site visit and information reviews as part of this Phase I ISA, it is the opinion of Michael Baker, based on the current building configuration, that a potential AST at this property is likely situated at least approximately 330 feet, or greater, cross-gradient from subject site. Since no evidence to suggest that this off-site adjoining property has impacted soil, soil gas and/or groundwater, it is the opinion of Michael Baker that no REC has resulted.

No REC
Valvoline Instant Oil Change Gn0043 (985 N Weir Canyon Boulevard). This facility adjoins the subject site to the west across Yorba Linda Boulevard. This facility provides oil change services which typically involve handling of hazardous materials. A 1,987-gallon AST containing unknown materials was reported. Additionally, a 55-gallon non RCRA hazardous waste liquid was also reported. No releases were reported at this property.

Based on available records, there is no evidence to suggest a past release to soil, soil gas, or groundwater has occurred at this property. Thus, it is the opinion of Michael Baker that no REC has resulted.

No REC
Savi Ranch Circle K 76 (945 North Weir Canyon Boulevard). This facility adjoins the subject site to the southwest across Yorba Linda Boulevard. Three USTs were reported at this property. Based on files reviewed, USTs included one 20,000-gallon UST containing regular unleaded petroleum, one 8,000- gallon UST containing diesel fuel; and one 12,000-gallon UST containing premium unleaded. This facility has been listed as a service station from 2003 through 2014. Although several violations have been reported involving failure of the leak detection equipment, no releases have been reported at this property.

No REC

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Relationship to the Subject Site
Based on the May 7, 2025 site visit and information revised as part of this Phase I ISA, the USTs at this facility are anticipated to be located approximately 190 feet southwest . This site is considered up-gradient from the site.

Based on available records, there is no evidence to suggest a past release to soil, soil gas, or groundwater has occurred on this site. The project would involve disturbance of existing sidewalks, and landscaping and/or paved areas associated with partial ROW acquisition at APNs 52-117-01, -02, and -03, which is approximately 190 feet northeast from the USTs at this site. This site is considered up- and cross-gradient from the site. As there is no evidence to suggest that these USTs have impacted soil, soil gas and/or groundwater, it is the opinion of Michael Baker that no REC has resulted.

John Force Racing Inc (22722 Old Canal Road). This facility adjoins the subject site to the southeast (south of Old Canal Road and east of Eastpark Drive, near the eastern terminus of the subject site). This facility was reported as a Small Quantity Generator and handler of tetrachloroethylene (liquid), unspecified organic liquid mixture, unspecified solvent mixture, liquids with halogenated organic compounds, and oil/water separation sludge. No releases were reported.

Relationship to the Subject Site
Based on the information reviewed as part of this Phase I ISA, this off-site property is anticipated to be associated with automobile service uses. This property has not reported any releases nor reported the presence of any USTs or ASTs. As such, it is the opinion of Michael Baker that no REC has resulted in this regard.

No REC
Kaiser Foundation Hospital-Yorba Linda Medical Offices (22550 Savi Ranch Parkway). This facility adjoins the subject site to the east (south of Mirage Street and north of Old Canal Road). This facility provides medical services and is listed in RCRA Listings as a large quantity generator. Variations of medical-related chemicals/waste were reported at this site. No releases were reported.

Relationship to the Subject Site
Based on the information reviewed as part of this Phase I ISA, this property has not reported any release. As such, it is the opinion of Michael Baker that no REC has resulted in this regard.

No REC
Existing Bridge Structure
It is acknowledged that one bridge structure (Yorba Linda Boulevard over Old Canal Road) is present adjoining the Yorba Linda Boulevard portion of the site.

No modifications to the existing bridge structure are proposed. As such, it is the opinion of Michael Baker that no REC has resulted and the project is not anticipated to involve bridge-structure related asbestos-containing materials (ACMs) and/or lead-based paints (LBPs).

No REC
Past Adjoining Uses
Past Adjoining Agricultural
Uses
Based upon evaluation of the documented land use as demonstrated in the reviewed resources, the series of historical aerial photographs and maps, and the site inspection, majority of the adjoining uses appears to have been historically utilized for agricultural purposes (from at least 1938 through mid1980’s). Therefore, a combination of several commonly used pesticides (i.e., DDD, DDT, DDE), which are now banned, may have been used throughout the subject site. The historical use of agricultural pesticides may have resulted in No REC

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pesticide residues of certain persistence in soil at concentrations that are considered to be hazardous based on established federal regulatory levels.

The primary concern with historical pesticide residues is human health risk from inadvertent ingestion of contaminated soil, particularly by children. The presence of moderately elevated pesticide residuals in soil presents potential health and marketplace concerns. Furthermore, a water well is located to the north of the site, possibly associated with past agricultural use.

Given the length of past agricultural use adjoining and surrounding the subject site, pesticide residues of certain persistence in soil could be of concern.

However, from 1980s onward, the subject site and its surrounding area were heavily graded and then developed with commercial, industrial, and residential development. As such, it is unlikely that elevated concentrations of pesticide residues in soil from past adjoining agricultural use impacted on-site soils.

Further, there is no evidence that these former agricultural uses did not use good customary practices. As such, it is the opinion of Michael Baker that no REC has resulted in this regard.

Multiple adjoining structure area noted surrounding the subject property during this time period. Such structures appear to be associated with agricultural uses and/or consist of ancillary residences. In addition, one large operation is noted to the north of the subject site, but south of the river. Based on the EDR database search, no evidence of a release of hazardous materials from these past adjoining activities have been noted. It is the opinion of Michael Baker that no REC has resulted in association with these past adjoining structures.

Past Adjoining Commercial
Uses Associated with ROW
Acquisition Areas
Past Commercial Use (UPS Alliance Shipping Partner) at APN 352-112-03 (5511 Mirage Street). Based on the information reviewed as part of this Phase I ISA, UPS Alliance Shipping Partner was listed at this property, along with Staples, as of 2020. Based on historical information reviewed, no other former land uses other than those discussed in this Phase I ISA were noted. Based on available regulatory listings, no past releases to soil, soil gas, or groundwater from this past commercial use were recorded. As such, it is the opinion of Michael Baker that no REC has resulted.

No REC
Past Commercial Use (Pet Hospital) at APN 352-112-04 (5521 Mirage Street).

Based on available records, no past releases to soil, soil gas, or groundwater from past uses of this site (i.e., Banfield the Pet Hospital and Medical Management International) were recorded. Based on the information reviewed as part of this Phase I ISA, no other historical land uses other than those commercial use discussed were located on this site since its development. As such, it is the opinion of Michael Baker that no REC has resulted from this past commercial use.

No REC
Past Commercial Use (Border Books & Music) at APN 352-113-02 (22401 Old Canal Road). Based on a review of historical documentation, Borders Books & Music was listed as an occupant of the site in 2005. Based on EDR, no other historical land uses different from commercial use were located on this site since its development. Based on available records, no past releases to soil, soil gas, or groundwater from past use of this site were recorded. As such, it is the opinion of Michael Baker that no REC has resulted from past use(s) on this site.

No REC

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Past Adjoining Commercial
Uses
Charmilles Technologies (22667 Old Canal Road). This facility adjoins the subject site to the north (along Old Canal Road, near the eastern terminus of the subject site). This facility is listed on an EDR-maintained database as a former drycleaner. EDR reported this use as active from 2002 until 2012. No violations or releases were reported in the EDR database search.

Relationship to the Subject Site
This property is located approximately 1,710 feet east of the proposed areas of drill pile locations (proposed for the installation of retaining walls).

As a dry cleaner, this facility has a high likelihood to result in a release.

However, proposed areas in proximity to this location only involve resurfacing activities and are not anticipated to result in any excavations of significance.

Further, proposed areas of excavation and deeper drilling activities for proposed retaining wall piles are located approximately 1,710 feet to the east (cross and down gradient). As such, it is the opinion of Michael Baker that this dry cleaner facility has potentially resulted in a release at the subject site.

However, based on the proposed activities, roadway resurfacing and retaining wall excavations and drilling pile activities, this release is likely a de minimis condition. As such, it is the opinion of Michael Baker that no REC has resulted.

No REC
(de minimis)
Current and Past Adjacent Uses
Adjacent Oil Field/Oil Well
Use
Based on a review of documentation, it is acknowledged that multiple oil fields are present to the west of the subject site (e.g., Richfield, Yorba Linda [ABD], as well as the smaller fields Esperanza, Kraemer Northeast [ABD] and Kramer [ABD]. The nearest fields (Kramer and Kramer Northeast) are abandoned and situated greater than 0.5-mile from the subject site. One idle oil well is noted approximately 1,820 feet north of the subject site across the Santa Ana River.

Based on the direction of groundwater flow, the distance to the subject site (1,820 feet north of the subject site), and the status of the well, it is the opinion of Michael Baker that no REC has resulted.

No REC
ROW Acquisition Findings and Opinions
352-112-03
5511 Mirage Street, Yorba
Linda

0.057-acre (partial)
Staples at APN 352-112-03 (5511 Mirage Street). Proposed partial ROW acquisition of parcel with APN 316-160-002 includes the acquisition of landscaping and/or paved areas for commercial use (Staples) on the site.

No REC
Past Commercial Use (UPS Alliance Shipping Partner) at APN 352-112-03 (5511 Mirage Street). Based on the information reviewed as part of this Phase I ISA, UPS Alliance Shipping Partner was listed at this property, along with Staples, as of 2020. Based on historical information reviewed, no other former land uses other than those discussed in this Phase I ISA were noted. Based on available regulatory listings, no past releases to soil, soil gas, or groundwater from this past commercial use were recorded. As such, it is the opinion of Michael Baker that no REC has resulted.

No REC
Past Agricultural Uses. Based upon evaluation of the documented land use as demonstrated in the reviewed resources, the series of historical aerial

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photographs and maps, and the site inspection, majority of the adjoining uses appears to have been historically utilized for agricultural purposes (from at least 1963 through the 1970’s, possibly up to 1985), by 1985, this property, and surrounding properties were graded.

Given the years of past agricultural use (1960s), pesticide residues of certain persistence in soil could be of concern in on-site soils. However, this property was heavily graded in the 1980s and then developed with the existing on-site commercial uses and roadways. As such, it is unlikely that elevated concentrations of pesticide residues in soil from past agricultural use remain.

Further, there is no evidence that these former agricultural uses did not use good customary practices. As such, it is the opinion of Michael Baker that residual pesticides are a de minimis condition, if any, and no REC has resulted in this regard.
352-112-04
5521 Mirage Street, Yorba
Linda

0.106-acre (partial)
Existing Commercial Use (PetSmart) at APN 352-112-04 (5521 Mirage Street).

Proposed partial ROW acquisition of parcel with APN 352-112-04 includes the acquisition of vacant landscaped areas and/or paved areas associated with a surface parking lot for the off-site commercial (PetsMart) building.

Based on a review of historical documentation, this commercial property was developed by 1994 and the structure has been occupied by PetsMart since at least 2005. Based on EDR, the current occupant, PetSmart, is reported for the storage, bulking, and/or transfer of typical retail waste (waste from returned and/or broken retail items) off-site without treatment/recovery. Hazardous waste containers were stored closed and properly labeled. No indications of illegal disposal were observed. In addition to the PetsMart operation, Medical Management International Inc Dba Banfield Pet Hospital #0098 was reported at this address from 2018 through 2021; this facility was reported for the storage, bulking and/or transfer of waste medicine off-site. Based on available records, no releases to soil, soil gas, or groundwater from this existing commercial use were recorded. As no evidence of a release was noted, it is the opinion of Michael Baker that no REC has resulted from the current commercial use on this site.

No REC
Past Commercial Use (Pet Hospital) at APN 352-112-04 (5521 Mirage Street).

No REC
Past Agricultural Uses. Based upon evaluation of the documented land use as demonstrated in the reviewed resources, the series of historical aerial photographs and maps, and the site inspection, majority of the adjoining uses appears to have been historically utilized for agricultural purposes (from at least 1963 through the 1970’s, possibly up to 1985), by 1985, this property, and surrounding properties were graded.

No REC
(de minimis)

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Given the years of past agricultural use (1960s), pesticide residues of certain persistence in soil could be of concern in on-site soils. However, this property was heavily graded in the 1980s and then developed with the existing on-site commercial uses and roadways. As such, it is unlikely that elevated concentrations of pesticide residues in soil from past agricultural use remain.

0.068-acre (partial)
Existing Commercial Use (Surface Parking Lot) at APN 352-113-01. Proposed partial ROW acquisition of parcel with APN 352-113-01 includes the acquisition of landscaping and/or paved areas. Paved areas encompass a surface parking lot serving the adjoining commercial use (Sprouts).

Based on a review of historical documentation, this surface parking lot was developed between 1994 and 2002 in order to serve the adjoining Sprouts building. Based on the information reviewed as part of this Phase I ISA, there are no indications that this surface parking lot used/stored/transported hazardous substances in reportable quantities. It is the opinion of Michael Baker that this use has not resulted in a REC at the time of this Phase I ISA.

No REC
Past Agricultural Uses. Based upon evaluation of the documented land use as demonstrated in the reviewed resources, the series of historical aerial photographs and maps, and the site inspection, majority of the adjoining uses appears to have been historically utilized for agricultural purposes (from at least 1946 through the 1970’s, possibly up to 1985), by 1985, this property, and surrounding properties were graded.

No REC
(de minimis)
352-113-02
22401 Old Canal Road,
Yorba Linda

0.150-acre (partial)
Existing Commercial Use (Sprouts) at APN 352-113-02 (22401 Old Canal Road). Proposed partial ROW acquisition of parcel with APN 352-113-02 includes the acquisition of landscaping and/or paved areas for commercial use (Sprouts) on the site.

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since its development. Based on available records, no past releases to soil, soil gas, or groundwater from past use of this site were recorded. As such, it is the opinion of Michael Baker that no REC has resulted from past use(s) on this site.

Past Adjoining Agricultural Uses. Based upon evaluation of the documented land use as demonstrated in the reviewed resources, the series of historical aerial photographs and maps, and the site inspection, majority of the adjoining uses appears to have been historically utilized for agricultural purposes (from at least 1938 through mid-1980’s).

Given the length of past agricultural use adjoining and surrounding the subject site, pesticide residues of certain persistence in soil could be of concern.

However, from 1980s onward, the subject site and its surrounding area were highly disturbed with commercial, transportation, and industrial development.

Specifically, the roadways were substantially widened/improved since 1980s.

As such, it is unlikely that elevated concentrations of pesticide residues in soil from past adjoining agricultural use impacted on-site soils. Additionally, there is no evidence that these agricultural use areas were not operated in accordance with good customary practices. As such, it is the opinion of Michael Baker that no REC has resulted in this regard.

No REC
(de minimis)
352-117-01
352-117-02
352-117-03
22300 Old Canal Road,
Yorba Linda

0.004-acre (partial)
Taco Bell at APNs 352-117-01, -02, and -03 (22300 Old Canal Road).

Proposed partial ROW acquisition of parcel with APNs 352-117-01, -02, and - 03 includes the acquisition of landscaping and/or paved areas for off-site commercial use (Taco Bell).

No REC
Past Adjoining Agricultural Uses. Although no on-site agricultural uses were noted at this property, multiple adjoining structures were noted in this area and appear to be associated with agricultural uses and/or consist of ancillary structures. Based on the EDR database search, no evidence of a release of hazardous materials from these past adjoining activities have been noted. It is the opinion of Michael Baker that no REC has resulted in association with these past structures.

No REC
Notes:

1. The following definitions apply to the Conclusions column identified above.

REC – A recognized environmental condition (REC) is the presence or likely presence of any hazardous substances or petroleum products in, on, or at a property: (1) due to any release to the environment; (2) under conditions indicative of a release to the environment; or (3) under conditions that pose a material threat of a future release to the environment.

CREC – A recognized environmental condition (REC) resulting from a past release of hazardous substances or petroleum products that has been addressed to the satisfaction of the applicable regulatory authority (for example, as evidenced by the issuance of a no further action letter or equivalent, or meeting risk-based criteria established by regulatory authority), with hazardous substances or petroleum products allowed to remain in place subject to the implementation of required controls (for example, property use restrictions, activity and use limitations, institutional controls, or engineering controls).

De minimis – A condition that generally does not present a threat to human health or the environment and that generally would not be the subject of an enforcement action if brought to the attention of appropriate governmental agencies. Conditions determined to be de minimis conditions are not RECs nor controlled recognized environmental conditions (CRECs).

HREC – A past release of any hazardous substances or petroleum products that has occurred in connection with the property and has been addressed to the satisfaction of the applicable regulatory authority or meeting unrestricted use criteria established by a regulatory authority, without subjecting the property to any required controls (for example, property use restrictions, activity and use limitations, institutional controls,

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CONCLUSIONS
Michael Baker has performed a Phase I ISA in conformance with the scope and limitations of ASTM E 1527-21 Standard Practice of the Savi Ranch Parkway Widening/Connect Savi Ranch Project site, City of Yorba Linda, California, the subject site. Any exceptions to, or deletions from, this practice are described in Section 6.4, Limiting Conditions/Deviations, of this Phase I ISA. This Phase I ISA has revealed no evidence of RECs in connection with the subject site.

RECOMMENDATIONS
The following recommendations are based on the findings, opinions of the Environmental Professional (Michael Baker International), and conclusions made during the course of this Phase I ISA.

No recommendations are provided herein as no areas have been identified as RECs or hazardous waste impacts.

Finding Opinion Conclusion1
or engineering controls). Before calling the past release a historical environmental condition (HREC), the environmental professional must determine whether the past release is a REC at the time the Phase I ISA is conducted (for example, if the Environmental Professional considers the past release to be a REC at the time the Phase I ISA is conducted, the condition shall be included in the conclusions section of the report as a REC.

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 1-1 SECTION 1.0

INTRODUCTION
The Savi Ranch Parkway Widening/Connect Savi Ranch Project site (herein referenced as the “subject site”) is situated in the southeastern portion of the City of Yorba Linda (City), along the border between the cities of Yorba Linda and Anaheim, in the County of Orange; refer to Exhibit 1, Regional Vicinity. The subject site is located within Savi Ranch. The proposed roadway improvements are located on Savi Ranch Parkway (between Yorba Linda Boulevard and Mirage Street), on Mirage Street (between Crystal Drive and Old Canal Road), and on Yorba Linda Boulevard (from Savi Ranch Parkway to approximately 480 feet south of Savi Ranch Parkway); refer to Exhibit 2, Site Vicinity, and Exhibit 3, Subject Site. The proposed multi-use trail would extend along Savi Ranch Parkway to Mirage Street, to Old Canal Road, and terminate at the intersection of Old Canal Road and Eastpark Drive. Surrounding land uses of the subject site include commercial, industrial, residential, open space/recreation, and transportation uses.

The City proposes roadway and multi-use trail improvements within and surrounding Savi Ranch. Savi Ranch, located within the southeastern portion of the City, is a primary job center and consists of retail, commercial, industrial, and office uses. The project includes roadway improvements along Savi Ranch Parkway, Yorba Linda Boulevard, and Mirage Street in addition to a multi-use pedestrian and bicycle trail along Savi Ranch Parkway, Mirage Street, and Old Canal Road; refer to Exhibit 4a, Conceptual Site Plan – Savi Ranch Parkway Widening, and Exhibit 4b, Conceptual Site Plan – Multi-Use Trail Improvements. The temporary and permanent right-ofway (ROW) acquisitions associated with the project’s roadway improvements are depicted in Exhibit 5, Existing and Proposed Right-of-Way. As the region continues to grow in population and development, the proposed circulation improvements would improve mobility and provide additional opportunities for active transportation within the project area.

Page 754 of 2424 ends

SAVI RANCH PARKWAY WIDENING/CONNECT SAVI RANCH PROJECT

PHASE I INITIAL SITE ASSESSMENT
Exhibit 1
Regional Vicinity

P A C I F I C O C E A N
USMC
Camp Pendleton
101
395
405
405
605
105
210
210
710
110
215
215
5 5
5 15
15 15
15 10
10 10
73 55
57 91 91
90 60 71
83 66
91 60
38 18
18 22
39 1
2 14
18 18
138
138 173
24 74
74 1
1 133
261
241
330
241

SAN BERNARDINO
COUNTY

RIVERSIDE
COUNTY

SAN DIEGO
COUNTY

LOS ANGELES
COUNTY
ORANGE
COUNTY
Victorville
Adelanto
Hesperia
Apple Valley
Lake
Arrowhead
Running
Springs
Riverside
Fontana
Ontario Pomona
Rancho
Cucamonga
Chino
Rialto
Corona
Norco
Lake
Elsinore
Heme
Beaumon
Redlands
Temecula
Fallbrook
Oceanside
Murrieta
Palmdale
Pasadena
West
Covina
Whittier
Burbank
Glendora
Los
Angeles
Torrance
Long
Beach
Newport
Beach
Huntington
Beach
San
Clemente
Dana
Point
Laguna
Beach San Juan
Capistrano
Santa
Ana
Costa
Mesa
Garden
Grove
Fullerton
Yorba
Linda
Irvine
Moreno
Valley
Sun
City
San
Fernando
Perris
San
Bernardino
Subject
Site

NOT TO SCALE
05/2025 • JN 204674 Page 755 of 2424
Historical Topo Map
page
SITE NAME:

ADDRESS:

CLIENT:

This report includes information from the
following map sheet(s).
-
W E

SW S SE

NW N NE
2022
0 Miles 0.25 0.5 1 1.5

SAVI RANCH PROJECT
Old Canal Road/Mirage Street
Yorba Linda, CA 92887
Michael Baker International
TP, Black Star Canyon, 2022, 7.5-minute
NE, Prado Dam, 2022, 7.5-minute
SW, Orange, 2022, 7.5-minute
NW, Yorba Linda, 2022, 7.5-minute
7974180 4 8

SAVI RANCH PARKWAY WIDENING/CONNECT SAVI RANCH PROJECT

PHASE I INITIAL SITE ASSESSMENT
Exhibit 2
Site Vicinity NOT TO SCALE
05/2025 • JN 204674
Subject Site

Page 756 of 2424 ends

SAVI RANCH PARKWAY WIDENING/CONNECT SAVI RANCH PROJECT

PHASE I INITIAL SITE ASSESSMENT
Exhibit 3
Subject Site

SANTA ANA RIVER

E CRYSTAL DR

PULLMAN ST

MIRAGE STMIRAGE ST

SAVI RANCH PKWY

OLD CANAL RD

EASTPARK DR

OAKCREST CR

RIVERSIDE FWY

YORBA LINDA BLVDYORBA LINDA BLVD

SANTA ANA RIVERSANTA ANA RIVER

LA PALMA AVELA PALMA AVE

SAVI RANCH PARKWAY WIDENING

MULTI-USE TRAIL IMPROVEMENTS

SUBJECT SITE
05/2025 • JN 204674

NOT TO SCALE
Source: Google Earth Pro, May 2025

Page 757 of 2424 ends

SAVI RANCH PARKWAY WIDENING/CONNECT SAVI RANCH PROJECT

PHASE I INITIAL SITE ASSESSMENT
Exhibit 4a
Conceptual Site Plan – Savi Ranch Parkway Widening 05/2025 • JN 204674

NOT TO SCALE
Source: Mark Thomas, January 2025

Page 758 of 2424 ends

SAVI RANCH PARKWAY WIDENING/CONNECT SAVI RANCH PROJECT

PHASE I INITIAL SITE ASSESSMENT
Exhibit 4b
Conceptual Site Plan – Multi-Use Trail Improvements 05/2025 • JN 204674

NOT TO SCALE
Source: Mark Thomas, March 2025

SANTA ANA CANYON
Project Location Map
Connect Savi Ranch
Project
Legend
Project Location
Santa Ana River Trail

Page 759 of 2424 ends

SAVI RANCH PARKWAY WIDENING/CONNECT SAVI RANCH PROJECT

PHASE I INITIAL SITE ASSESSMENT
Exhibit 5
Existing and Proposed Right-of-Way 05/2025 • JN 204674

NOT TO SCALE
Source: Mark Thomas, January 2025
U
PIPE
PIPE

EASEMENT REQUIREMENTS FOR PETSMART, SPROUTS AND TACO BELL 40'

EXIST R/W TEMPORARY

CONSTRUCTION EASEMENT

PROPOSED EASEMENT FOR

PUBLIC STREET, DRAINAGE,

PUBLIC SERVICES AND

UTILITY EASEMENT

COUNTY OF

ORANGE EASEMENT
15' CITY OF YORBA LINDA

SEWER EASEMENT

OCFCD EASEMENT
30' OCSD UNDERGROUND

PUBLIC SEWER EASEMENT
25' YLWD

PIPELINE

EASEMENT
10' SCE EASEMENT

EXIST R/W

PROPOSED EASEMENT FOR

PUBLIC STREET, DRAINAGE,

PUBLIC SERVICES AND

UTILITY EASEMENT

PROPOSED EASEMENT

FOR PUBLIC STREET,

DRAINAGE, PUBLIC

SERVICES AND UTILITY

EASEMENT

TEMPORARY

CONSTRUCTION

EASEMENT PROPOSED EASEMENT FOR

PUBLIC STREET, DRAINAGE,

PUBLIC SERVICES AND

UTILITY EASEMENT

EXIST R/W

TEMPORARY

CONSTRUCTION

EASEMENT
10' 10' SCE EASEMENT
15' STORM DRAIN EASEMENT

PROPOSED EASEMENT FOR

PUBLIC STREET, DRAINAGE,

PUBLIC SERVICES AND

UTILITY EASEMENT

TEMPORARY

CONSTRUCTION EASEMENT

COUNTY OF

ORANGE EASEMENT

EXIST R/W

3.5± CITY OF YORBA LINDA

PUBLIC STREET, HIGHWAY,

DRAINAGE, LANDSCAPING, PUBLIC

SERVICES & UTILITY EASEMENT

PARCEL LINE
10' SCE EASEMENT
30' OCSD UNDERGROUND

PUBLIC SEWER EASEMENT
APN
352-112-03
352-112-04
352-113-01
352-113-02
352-117-01/02/03
2,367
4,632
2,985
6,547
194

ROADWAY

AND UTILITY

EASEMENT

TEMPORARY

CONSTRUCTION

EASEMENT
9,554
8,643
2,716
8,394
2,609
16,725 31,916

SQ FT SQ FT
LEGEND:

ROADWAY AND UTILITY PUBLIC EASEMENT

TEMPORARY CONSTRUCTION EASEMENT

PETSMART

STAPLES

SPROUTS

TACO BELL

CHICK-FIL-A
APN: 352-112-04
APN: 352-112-03
APN: 352-113-02
APN: 352-117-01/02/03
APN: 352-117-04
APN: 352-113-01

EASEMENT REQUIREMENTS FOR PETSMART, SPROUTS AND TACO BELL 40'

EXIST R/W TEMPORARY

CONSTRUCTION EASEMENT

PROPOSED EASEMENT FOR

PUBLIC STREET, DRAINAGE,

PUBLIC SERVICES AND

UTILITY EASEMENT

COUNTY OF

ORANGE EASEMENT
15' CITY OF YORBA LINDA

SEWER EASEMENT

OCFCD EASEMENT
30' OCSD UNDERGROUND

PUBLIC SEWER EASEMENT
25' YLWD

PIPELINE

EASEMENT
10' SCE EASEMENT

EXIST R/W

PROPOSED EASEMENT FOR

PUBLIC STREET, DRAINAGE,

PUBLIC SERVICES AND

UTILITY EASEMENT

PROPOSED EASEMENT

FOR PUBLIC STREET,

DRAINAGE, PUBLIC

SERVICES AND UTILITY

EASEMENT

TEMPORARY

CONSTRUCTION

EASEMENT PROPOSED EASEMENT FOR

PUBLIC STREET, DRAINAGE,

PUBLIC SERVICES AND

UTILITY EASEMENT

EXIST R/W

TEMPORARY

CONSTRUCTION

EASEMENT
10' 10' SCE EASEMENT
15' STORM DRAIN EASEMENT

PROPOSED EASEMENT FOR

PUBLIC STREET, DRAINAGE,

PUBLIC SERVICES AND

UTILITY EASEMENT

TEMPORARY

CONSTRUCTION EASEMENT

COUNTY OF

ORANGE EASEMENT

EXIST R/W

3.5± CITY OF YORBA LINDA

PUBLIC STREET, HIGHWAY,

DRAINAGE, LANDSCAPING, PUBLIC

SERVICES & UTILITY EASEMENT

PARCEL LINE
10' SCE EASEMENT
30' OCSD UNDERGROUND

PUBLIC SEWER EASEMENT
APN
352-112-03
352-112-04
352-113-01
352-113-02
352-117-01/02/03
2,367
4,632
2,985
6,547
194

ROADWAY

AND UTILITY

EASEMENT

TEMPORARY

CONSTRUCTION

EASEMENT
9,554
8,643
2,716
8,394
2,609
16,725 31,916

SQ FT SQ FT
LEGEND:

ROADWAY AND UTILITY PUBLIC EASEMENT

TEMPORARY CONSTRUCTION EASEMENT
Mirage St
Savi Ranch Pkwy
Yorba Linda Blvd
Old Canal Rd
NORTH

Page 760 of 2424 ends

Section 1.0 | Introduction
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 1-8

1.1 PROJECT DESCRIPTION

1.1.1 EXISTING CONDITIONS
Savi Ranch occurs in a predominantly urbanized and developed area, with the Santa Ana River located west of the project site with an east to west orientation. As discussed above, surrounding land uses of the subject site include commercial, industrial, residential, open space/recreation, and transportation uses.

The project includes roadway improvements along Yorba Linda Boulevard, Savi Ranch Parkway, and Mirage Street, and multi-use trail improvements along Savi Ranch Parkway, Mirage Street, and Old Canal Road. A description of each of these existing roadways is provided below:
• Savi Ranch Parkway: Savi Ranch Parkway between Yorba Linda Boulevard and Mirage Street consists of two westbound lanes and two eastbound lanes divided by a raised median. The eastbound Savi Ranch Parkway at the Mirage Street intersection is signalized and includes two left-turn lanes, one through lane, and one free-right turn lane. The westbound Savi Ranch Parkway intersection with Yorba Linda Boulevard is signalized and consists of two right turn lanes and two left turn lanes. • Yorba Linda Boulevard: Yorba Linda Boulevard includes three through lanes in each direction within the project area. The intersection of Yorba Linda Boulevard and Savi Ranch Parkway is signalized; northbound Yorba Linda Boulevard at Savi Ranch Parkway currently consists of one left-turn lane, three through lanes, and a free-right turn lane.

Southbound Yorba Linda Boulevard at the Savi Ranch Parkway intersection currently consists of one left turn lane, three through lanes, and one right turn lane. • Mirage Street: The intersection of Mirage Street and Savi Ranch Parkway is signalized.

Northbound Mirage Street at Savi Ranch Parkway currently consists of one left-turn lane and two through lanes. Southbound Mirage Street at the Savi Ranch Parkway intersection currently consists of one left turn lane, one through lane, and a free-right turn lane. The intersection of Mirage Street and Old Canal Street is four-way stop controlled.

Page 761 of 2424 ends

Section 1.0 | Introduction
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 1-9 Mirage Street is four-way stop controlled. Westbound Old Canal Road consists of one left turn, one through lane, and one right turn lane, and eastbound Old Canal Road consists of one left turn and one through lane.

Currently, there are no dedicated bicycle facilities along roadways within the project site. The Orange County Transportation Authority (OCTA) Master Plan of Arterial Highways (MPAH) designates Yorba Linda Boulevard as a Major arterial, Savi Ranch Parkway as a Primary arterial, and Old Canal Road as a Collector; Mirage Street is not identified in the MPAH.

1.1.2 PURPOSE AND NEED
As noted above, Savi Ranch is a major retail and economic center within the City. Savi Ranch Parkway is the single point of ingress/egress to Savi Ranch, and this segment of the roadway experiences substantial congestion during peak hours (particularly in the westbound direction during PM peak hours). The westbound left turn traffic volumes exceed the current capacity, producing long queues that extend through the Savi Ranch Parkway/Mirage Street intersection that block movements at that intersection. Additionally, the existing free right-turn lanes from Yorba Linda Boulevard onto eastbound Savi Ranch Parkway and Mirage Street onto westbound Savi Ranch Parkway have resulted in queue spillback due to the short length of Savi Ranch Parkway between Yorba Linda Boulevard and Mirage Street.

The project would improve the circulation system around Savi Ranch in order to better facilitate ingress and egress, address operational issues related to queuing, and improve mobility near high-volume freeway ramps and interchanges near the state highway system. The proposed project would construct a multi-use trail to address the need for multimodal facilities in Savi Ranch that increase mobility and enhance safety.

1.1.3 PROJECT CHARACTERISTICS
The project would include a range of roadway and multi-use trail improvements along Savi Ranch Parkway, Yorba Linda Boulevard, Mirage Street, and Old Canal Road. The following describes in further detail the proposed roadway and trail improvements associated with the proposed project.

1.1.3.1 Roadway Improvements
• Savi Ranch Parkway: The proposed project would widen Savi Ranch Parkway to provide a third westbound left-turn lane at the Yorba Linda Boulevard intersection. The

Page 762 of 2424 ends

Section 1.0 | Introduction
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 1-10 westbound free right-turn lane from Mirage Street would be reconfigured into a signalized right-turn lane, and the existing median at this location would be removed. The eastbound free right-turn lane at Mirage Street would be eliminated for pedestrian safety and increase vehicular mobility, and the existing eastbound left-turn lane would be lengthened from 300 feet to 430 feet in order to allow additional storage. Other roadway improvements would include median layout modifications and traffic signal modifications at the Yorba Linda Boulevard and Mirage Street intersections. Refer to Exhibit 4a.
• Yorba Linda Boulevard: The proposed project would eliminate the eastbound free rightturn and adjacent raised median at Savi Ranch Parkway; this improvement is intended to address pedestrian safety and increase vehicular mobility. The project would widen Yorba Linda Boulevard on the easterly side to provide two right-turn lanes while maintaining the existing through lanes. A length of 450 feet would be provided for rightturn storage. Additional improvements include a modification to the existing sidewalk connecting to an adjacent restaurant use (Taco Bell) and relocation of an existing Savi Ranch monument sign. Refer to Exhibit 4a.
• Mirage Street: The proposed project would eliminate the existing southbound yield rightturn at Savi Ranch Parkway; this improvement is intended to address pedestrian safety and increase vehicular mobility. Additional improvements at this segment include a sidewalk on the westerly side of Mirage Street from Savi Ranch Parkway to the existing driveway for the PetSmart and Staples parking lot, and Americans with Disabilities Act (ADA) access ramps and paths of travel. Refer to Exhibit 4a.

1.1.3.2 Multi-Use Trail
The project would include a Class I off-street multi-use path on Savi Ranch Parkway and Mirage Street and a Class IV separated bikeway along Old Canal Road; refer to Exhibit 4b. The proposed bikeways would be 12 feet wide with an asphalt concrete surface.

1.1.3.3 Retaining Walls
The proposed project would install four retaining walls; refer to Exhibit 4a. These retaining walls would require excavation of 24 feet low ground surface (bgs), with footings (to be installed via drilled piles) reaching a maximum of 40 feet bgs.
• A new retaining wall along the west side of Mirage Street would have a length of approximately 79 feet and a maximum height of approximately eight feet;

Page 763 of 2424 ends

Section 1.0 | Introduction
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 1-11 • An existing retaining wall along the north side of Savi Ranch Parkway would be replaced by a new retaining wall with a length of approximately 472 feet and a maximum height of approximately 12 feet;
• A new retaining wall along the south side of Savi Ranch Parkway would have a length of approximately 300 feet and a maximum height of approximately 10 feet; and • A new retaining wall along the east side of Yorba Linda Boulevard would have a length of approximately 92 feet and a maximum height of approximately nine feet.

1.1.3.4 Traffic Signage and Lighting
The project would require the removal and/or relocation of streetlights along existing roadways; all street lighting removals, relocations, and/or installation would be conducted by Southern California Edison per plans approved by the City. New illuminated traffic signs would be installed at the intersections of Yorba Linda Boulevard/Savi Ranch Parkway and Savi Ranch Parkway/Mirage Street.

1.1.3.5 Landscaping and Irrigation
Vegetation clearing and grubbing would be required for roadway and multi-use trail improvements. The project would include new landscaping consisting of Natchez Crape Myrtle tree, a variety of shrubs including Little John dwarf, flower carpet white rose, Cleveland sage, and pine muhly, and Pacific mist manzanita groundcover. Irrigation would be provided by lateral sprinklers, tree drip water bubblers, a root water system for shrubs, and subsurface inline drip, all connected to existing water lines.

1.1.3.6 Site Drainage and Utilities
The project proposes to remove two existing catch basins, and install two new catch basins; one catch basin would be located at the corner of Mirage Street and Crystal Drive and would incorporate biofiltration, and the other catch basin would be located at the southwest corner of Savi Ranch Parkway and Mirage Street. Additionally, tree wells for new planted trees would include filters for biofiltration.

Project implementation would require that existing utilities are removed, relocated, or adjusted to grade. Coordination with all utility providers would be required in order to prevent disruption

Page 764 of 2424 ends

Section 1.0 | Introduction
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 1-12 of services and to protect in place existing lines to the extent feasible. Additionally, connections to existing water lines would be required for landscape irrigation.

1.1.4 RIGHT-OF-WAY ACQUISITION
The temporary and permanent right-of-way (ROW) acquisitions associated with the project’s roadway improvements are depicted in Exhibit 5. As depicted in Exhibit 5, the roadway improvements would require permanent public utility and roadway easements as well as temporary construction easements. Specifically, Assessor’s Parcel Numbers (APNs) 352-112-03 (Staples), 352-112-04 (PetSmart), 352-113-01, 352-113-02 (Sprouts), and 352-117-01, -02, and -03 (Taco Bell) would be permanently acquired. In total, the roadway improvements would require approximately 16,725 square feet in permanent ROW acquisition, and require approximately 31,916 square feet for temporary construction easements.

For the purpose of this Phase I ISA, temporary easements are not considered, as such activities would be temporary in nature and no permanent property acquisition would result. A summary of proposed areas of permanent ROW acquisition is provided in Table 1-1, Proposed ROW Acquisition Areas.

Table 1-1
Proposed ROW Acquisition Areas
Assessor’s
Parcel Number
(APN)
Address
Area of ROW
Acquisition (Partial
or Full)
Existing Use
Proposed City ROW Acquisition
352-112-03 5511 Mirage Street,
Yorba Linda 0.057-acre (partial)
Landscaping and/or paved areas for commercial
use (one-story commercial structure occupied by
Staples)
352-112-04 5521 Mirage Street,
Yorba Linda 0.106-acre (partial)
Landscaping and/or paved areas for commercial
use (one-story commercial structure occupied by
PetSmart)
352-113-01 NA 0.068-acre (partial)
Landscaping and/or paved areas, as well as
surface parking lot serving the adjoining
commercial use (Sprouts)
352-113-02 22401 Old Canal Road,
Yorba Linda 0.150-acre o (partial)
Landscaping and/or paved areas for commercial
use (one-story commercial structure occupied by
Sprouts)
352-117-01, -02,
and -03
22300 Old Canal Road,
Yorba Linda 0.004-acre (partial)
Landscaping and/or paved areas for commercial
use (one-story commercial structure occupied by
Taco Bell)

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Section 1.0 | Introduction
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 1-13

1.2 PURPOSE OF THE PHASE I ISA
The purpose of conducting this Phase I ISA is to identify RECs as defined by the ASTM E 1527- 21 Standard Practice for Environmental Site Assessments (Standard Practice). The ASTM E 1527- 21 Standard Practice defines the term REC as “(1) the presence of any hazardous substances or petroleum products in, on, or at the subject property due to a release to the environment; (2) the likely presence of hazardous substances or petroleum products in, on, or at the subject property due to a release or likely release to the environment; or (3) the likely presence of hazardous substances or petroleum products in, on, or at the subject property under conditions that pose a material threat of a future release to the environment.” De minimis conditions are conditions related to a release that generally do not present a threat to human health or the environment and that generally would not be the subject of an enforcement action if brought to the attention of appropriate governmental agencies. A de minimis condition is not a REC. This Phase I ISA was conducted in accordance with the ASTM E 1527-21 Standard Practice and satisfies the requirements of 40 CFR Part 312 titled Standards and Practices for All Appropriate Inquiries, as required under Section 101(35)(B)(ii) and (iii) of the CERCLA. The purpose of conducting an All Appropriate Inquiries (AAI) investigation into the previous ownership and uses of a property is to meet the provisions necessary for the innocent landowner, contiguous property owner, or bona fide prospective purchaser to qualify for certain landowner liability protections under CERCLA.

To assist in understanding the terminology contained in this Phase I ISA, a glossary of terms associated with the ASTM E 1527-21 Standard Practice is provided in Appendix A, ASTM Terminology.

1.3 DETAILED SCOPE OF SERVICES
This scope of work follows the ASTM E 1527-21 Standard Practice. The ASTM E 1527-21 Standard Practice outlines a procedure for completing Phase I ISAs that includes review of Federal, tribal, State, and local government records; site reconnaissance; interviews with current owners, operators, occupants, and government officials; and report preparation. This practice does not include any testing or sampling of materials (for example, soil, water, air, building materials, etc.).

This Phase I ISA is not intended to provide specific qualitative or quantitative information as to the actual presence of hazardous substances at the subject site, but is to merely identify the potential presence based on available information.

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Section 1.0 | Introduction
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 1-14

1.4 SIGNIFICANT ASSUMPTIONS
Unless stated otherwise in this Phase I ISA, Michael Baker assumes that groundwater flow follows the topography. Based on on-site topography, the groundwater flow on-site is expected to be generally in a northwesterly direction.

In lieu of reasonably available public information pertaining to groundwater contamination, Michael Baker assumes that groundwater plume dimensions are within the 90th percentile of plumes determined by research conducted as part of ASTM E 2600-10 Standard Guide for Vapor Encroachment Screening on Property Involved in Real Estate Transactions, which described in detail in Table 1-2, Groundwater Plume Dimension Assumptions.

Table 1-2
Groundwater Plume Dimension Assumptions
Chemical Contamination Length of Plume UpGradient From Source Length of Plume DownGradient from SourceMaximum Width of Plume From Source
Chemical of Concern 100 feet 1,760 feet 365 feet
Petroleum Hydrocarbon Chemical of Concern
With Free Product 100 feet 528 feet 165 feet
Dissolved 100 feet 528 feet 95 feet
Notes: These dimension assumptions are based on research conducted as part of ASTM E 2600-10 Standard Guide for Vapor Encroachment Screening on Property Involved in real Estate Transactions, which has determined that 90 percent of plumes are these dimensions or less.

Source: Anthony J. Buonicore, Methodology for Identifying the Area of Concern Around a Property Potentially Impacted by Vapor Migration from Nearby Contaminated Sources, Paper 2011-A-301-AWMA, June 2011.

1.5 LIMITATIONS, DEVIATIONS, AND

EXCEPTIONS
Michael Baker was unable to identify, within a five-year interval, the year (between 1966 and 1972) that the southern portion of the site along Yorba Linda Boulevard has been developed.

Although Michael Baker did not achieve data within a five-year interval of a change in use at the subject site, no other records reviewed as part of this Phase I ISA has suggested that land uses other than those noted have been associated with the subject site. Thus, it is the opinion of Michael Baker that this deviation is not a significant data gap.

Not all files were reviewed for reported adjoining regulatory properties, as the Anaheim Fire & Rescue (Anaheim Fire) has requested an extension on May 27, 2025. As such, Anaheim Fire records were not available for review at the time of this Phase I ISA. However, based on the available historical documentation reviewed as part of this Phase I ISA, it is the opinion of Michael Baker that these files would not have increased the knowledge of the Environmental Professional

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Section 1.0 | Introduction
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 1-15 such that the conclusions of this Phase I ISA would change. Thus, it is the opinion of Michael Baker that this deviation is not a significant data gap.

The existing property owners associated with ROW acquisition areas (owned by private entities) were not interviewed during the preparation of this Phase I ISA. However, based on the available historical documentation reviewed as part of this Phase I ISA, it is the opinion of Michael Baker that interviews of these existing property owners associated with ROW acquisition areas would not have increased the knowledge of the Environmental Professional such that the conclusions of this Phase I ISA would change. Thus, it is the opinion of Michael Baker that this deviation is not a significant data gap.

Further, no additional scope items, or items outside of the scope of a Phase I ISA E 1527-21 Standard Practice, were conducted as part of this Phase I ISA.

1.6 USER RESPONSIBILITIES
This Phase I ISA does not satisfy continuing obligations under CERCLA liability protections provided for innocent landowners, bona fide prospective purchasers, and contiguous property owners, which includes, but is not limited to, duties required after property acquisition (i.e., compliance with land use restrictions and institutional controls, undertaking “reasonable steps” with respect to hazardous substances releases, compliance with other obligations such as reporting obligations and information requests, etc.).

ASTM E 1527-21 Standard Practice defines the user as “the party seeking to use Practice E 1527 to complete an environmental site assessment of the subject property.” The purpose of this section is to describe tasks to be performed by the user that will help identify the possibility of recognized environmental conditions in connection with the subject site. These tasks do not require the technical expertise of an Environmental Professional and are not required to be performed by Environmental Professional performing a Phase I ESA [or ISA]. The user questionnaire utilized within this Phase I ISA is optional to the user and aids the Environmental Professional in gathering information from the user that may be material to identifying RECs (refer to Section 2.0, User Provided Information, for a discussion of the User Questionnaire conducted as part of this Phase I ISA. It should be noted that the following tasks are required, by the user of this Phase I ISA, to satisfy the requirements of conducting all appropriate inquiries.

1.6.1 REVIEW TITLE AND JUDICIAL RECORDS FOR

ENVIRONMENTAL LIENS OR ACTIVITY AND USE

LIMITATIONS (AULS)

Page 768 of 2424 ends

Section 1.0 | Introduction
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 1-16 To meet the requirements of 40 CFR 312.20 and 312.25, a search for the existence of environmental liens and AULs that are filed or recorded against the subject property must be conducted. To meet this requirement, users may rely on either of the two methods detailed below.

1.6.1.1 Method 1: Transaction-Related Title Insurance Documentation Such as Preliminary Title Reports and Title Commitments
The user may rely on title insurance documentation, commonly fashioned as preliminary title reports or title commitments, which are prepared in the course of offering title insurance for the subject property transaction to identify environmental liens or AULs filed or recorded against the subject property. Title insurance documentation involves a reliable review of land title records or judicial records discussing title insurance documentation). However, the user (or a title professional engaged by the user) should closely review the title insurance documentation, particularly the areas of the documentation listing subject property encumbrances or “restrictions on record,” for indications of AULs or environmental liens.

1.6.1.2 Method 2: Title Search Information Reports Such as Condition of Title, Title Abstracts, and AUL/Environmental Lien Reports
Alternatively, users may rely on title search information reports to identify environmental liens or AULs filed or recorded against the subject property. Title search information reports, commonly fashioned as Condition of Title, Title Abstract, AUL/Environmental Lien, or similarly titled reports, provide the results of land title record and/or judicial records research (as applicable) for information purposes only, rather than for the purposes of offering title insurance.

Users may rely on title search information reports as long as the title search information reports meet the following scope: Title search information reports shall identify environmental covenants, environmental easements, land use covenant and agreements, declaration of environmental land use restrictions, environmental land use controls, environmental use controls, environmental liens, or any other recorded instrument that restricts, affects, or encumbers the title to the subject property due to restrictions or encumbrances associated with the presence of hazardous substances or petroleum products. Title search information reports shall review land title records for documents recorded between 1980 and the present. If judicial records are not reviewed, the title search information report shall include a statement providing

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 1-17 that the law or custom in the jurisdiction at issue does not require a search for judicial records in order to identify environmental liens.

1.6.1.3 Role of the Environmental Professional
The user’s responsibility to search for environmental liens and AULs required by this section is in addition to the environmental professional’s search of institutional control and engineering control registries. Unless this task is expressly added by a change in the scope of work to be performed by the Environmental Professional (refer to Section 1.5, Limitations, Deviations, and Exceptions), the user requirements do not impose on the Environmental Professional the responsibility to undertake a review of land title records or judicial records for environmental liens or AULs.

Any environmental liens or AULs identified under the requirements of Section 1.6.1, Review Land Title and Judicial Records for Environmental Liens and Activity and Use Limitations (AULs), or otherwise known to the user, should be reported to the Environmental Professional conducting the environmental site assessment. The Environmental Professional shall request that the user provide the results of user-performed AUL and environmental lien searches performed.

Environmental professionals shall describe in their report whether they received the results of the environmental lien and AUL search. The environmental professional does not need to review, assess, or otherwise evaluate the land title records or the user’s conclusions as to whether AULs or environmental liens were identified. The Environmental Professional only needs to identify whether they received land title records from the user and whether the user identified AULs or environmental liens.

1.6.1.4 Reasonably Ascertainable Title and Judicial Records for Environmental Liens and Activity and Use Limitations
Environmental liens and AULs that are recorded or filed in any place other than land title records or judicial records (as applicable) are not considered to be reasonably ascertainable unless applicable Federal, tribal, State, or local statutes or regulations specify a place other than land title records or judicial records (as applicable) for recording or filing of environmental liens and AULs.

1.6.2 SPECIALIZED KNOWLEDGE OR EXPERIENCE OF THE USER
Users must take into account their specialized knowledge to identify conditions indicative of releases or threatened releases. If the user has any specialized knowledge or experience that is material to RECs in connection with the subject property, the user should communicate any

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 1-18 information based on such specialized knowledge or experience to the environmental professional. The user should do so before the Environmental Professional conducts the site reconnaissance.

1.6.3 ACTUAL KNOWLEDGE OF THE USER
If the user has actual knowledge of any environmental lien or AULs encumbering the subject property or in connection with the subject property, the user should communicate such information to the environmental professional. The user should do so before the Environmental Professional conducts the site reconnaissance.

1.6.4 REASON FOR SIGNIFICANTLY LOWER PURCHASE PRICE
In a transaction involving the purchase of a parcel of commercial real estate, the user shall consider the relationship of the purchase price of the subject property to the fair market value of the subject property if the subject property was not affected by hazardous substances or petroleum products. The user should try to identify an explanation for a lower price which does not reasonably reflect fair market value if the subject property were not contaminated, and make a written record of such explanation. Among the factors to consider will be the information that becomes known to the user pursuant to the Phase I ISA. The ASTM E 1527-21 Standard Practice does not require that a real estate appraisal be obtained in order to ascertain fair market value of the subject property. The user should inform the Environmental Professional if the user believes that the purchase price of the subject property is lower than the fair market value due to contamination. The user is not required to disclose the purchase price to the environmental professional.

1.6.5 COMMONLY KNOWN OR REASONABLY ASCERTAINABLE

INFORMATION
Commonly known or reasonably ascertainable information within the local community about the subject property must be taken into account by the user. If the user is aware of any commonly known or reasonably ascertainable information within the local community about the subject property that is material to recognized environmental conditions in connection with the subject property, the user should communicate such information to the environmental professional. The user should do so before the Environmental Professional conducts the site reconnaissance. The user must gather such information to the extent necessary to identify conditions indicative of releases or threatened releases of hazardous substances or petroleum products.

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1.6.6 DEGREE OF OBVIOUSNESS
The user must consider the degree of obviousness of the presence or likely presence of releases or threatened releases at the subject property and the ability to detect releases or threatened releases by appropriate investigation including the information collected under the following sections within this Phase I ISA:
• Section 1.6.1, Review Land Title and Judicial Records for Environmental Liens and Activity and Use Limitations (AULs);
• Section 1.6.2, Specialized Knowledge or Experience of the User; • Section 1.6.4, Reason for Significantly Lower Purchase Price; • Section 1.6.5, Commonly Known or Reasonably Ascertainable Information; • Section 3.2, Standard Environmental Records Sources;
• Section 3.4, Historical Use Information on the Subject Site and Adjoining Properties; • Section 4.0, Site Reconnaissance; and
• Section 5.0, Interviews.

1.6.7 OTHER
Either the user shall make known to the Environmental Professional the reason why the user wants to have the Phase I ISA performed or, if the user does not identify the purpose of the Phase I ISA, the Environmental Professional shall assume the purpose is to qualify for a Landowner Liability Protection (LLP) to CERCLA liability and state this in the report.

1.7 SPECIAL TERMS AND CONDITIONS
No special terms and conditions were identified for this scope of work.

1.8 USER RELIANCE
No person or entity is entitled to rely upon any finding, conclusion, or other information set forth in this report at any time after 180 days from the issuance date of this report. This report and all supporting data, notes, and documentation where applicable (collectively referred to hereinafter as “information”), were prepared or collected by Michael Baker for its clients, City of Yorba Linda and Caltrans. Michael Baker’s client may release the information to third parties, who may use and rely upon the information at their discretion; however, any use of or reliance upon the information by a party other than those specifically named above, shall be solely at the risk of such third party and without legal recourse against Michael Baker, its parent company, or its

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 1-20 subsidiaries and affiliates or their respective employees, officers, or directors, regardless of whether the action in which recovery of damages is sought is based upon contract, tort (including the sole, concurrent or other negligence and strict liability of Michael Baker), statute or otherwise.

No other warranty, expressed or limited, is included in or intended by this report.

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 2- 1 SECTION 2.0

USER PROVIDED INFORMATION
Per ASTM E 1527-21, the user of the Phase I ISA has an obligation to answer all questions posed by the User Questionnaire, in good faith, to the extent of his or her actual knowledge or to designate a key site manager to do so. If answers to questions are unknown or partially unknown to the user or such key site manager, this section shall not thereby be deemed incomplete.

The City of Yorba Linda and Caltrans are the ‘user(s)’ of this Phase I ISA and have provided Michael Baker with information regarding the proposed project for the subject site. The City has requested this Phase I ISA to support Caltrans-lead environmental documentation for the proposed project. Other information/documentation provided by the City and/or Caltrans are also referenced throughout this Phase I ISA, as applicable.

2.1 PREVIOUS DOCUMENTS
The user(s) provided the following technical reports prepared for this project as part of the Environmental Compliance Documentation for the purpose of the California Environmental Quality Act (CEQA) and National Environmental Policy Act (NEPA):
• Water Quality Technical Memorandum
• Natural Environment Study (Minimal Impacts)
• Visual Impact Assessment Memorandum
• Community Impact Assessment Memorandum
• Air Quality Technical Memorandum
• Noise Technical Memorandum

2.2 LITIGATION/ADMINISTRATIVE

PROCEEDINGS
The user(s) did not provide any information pertaining to any pending, threatened, or past litigation and/or administrative proceedings relevant to hazardous substances or petroleum products in, on, or from the property during the course of this Phase I ISA.

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 2-2

2.3 GOVERNMENTAL NOTICES
The user(s) did not provide any information pertaining to any notices from any governmental entity regarding any possible violation of environmental laws or possible liability relating to hazardous substances or petroleum products during the course of this Phase I ISA.

2.4 ENVIRONMENTAL LIENS
The user(s) did not provide any environmental lien information during the course of this Phase I ISA.

2.5 ACTIVITY AND USE LIMITATIONS
The user(s) did not provide any activity and use limitation information during the course of this Phase I ISA.

2.6 SPECIALIZED KNOWLEDGE OR EXPERIENCE
The user(s) did not provide any specialized knowledge or experience related to the subject site during the course of this Phase I ISA.

2.7 COMMONLY KNOWN OR REASONABLY

ASCERTAINABLE INFORMATION
The user(s) did not provide any commonly known or reasonably ascertainable information during the course of this Phase I ISA.

2.8 VALUATION REDUCTION FOR

ENVIRONMENTAL ISSUES
The user(s) did not report valuation reduction for environmental issues.

2.9 DEGREE OF OBVIOUSNESS
The user(s) did not report any obvious indicators that point to the presence or likely presence of releases at the property during the course of this Phase I ISA.

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2.10 REASON FOR PERFORMING PHASE I
This Phase I ISA has been requested by the Caltrans as part of the environmental clearance for the proposed project.

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-1 SECTION 3.0

RECORDS REVIEW

3.1 PHYSICAL SETTING SOURCES
Physical setting sources typically provide information regarding geologic, hydrogeologic, hydrologic, or topographic characteristics of a property. The following information is primarily based on review of the United States Geological Survey’s (USGS’) Black Star Canyon, Prado Dam, Orange, and Yorba Linda quadrangles, all dated 2022; and a site visit conducted by Michael Baker on May 7, 2025. Other miscellaneous resources utilized within this section and throughout the Phase I ISA are referenced in Section 7.0, References.

3.1.1 SUBJECT SITE DESCRIPTION

3.1.1.1 Location
The subject site is situated in the southeastern portion of the City, along the border between the cities of Yorba Linda and Anaheim, in the County of Orange; refer to Exhibit 1. Specifically, the subject site is located within Savi Ranch, a major retail and economic center within the City (Sections 29 and 32, Township 03S and Range 08W, San Bernardino Base and Meridian [SBBM]).

The proposed roadway improvements would be located on Savi Ranch Parkway (between Yorba Linda Boulevard and Mirage Street), on Mirage Street (between Crystal Drive and Old Canal Road), and on Yorba Linda Boulevard (from Savi Ranch Parkway to approximately 480 feet south of Savi Ranch Parkway); refer to Exhibit 2 and Exhibit 3. The proposed multi-use trail would extend along Savi Ranch Parkway to Mirage Street, to Old Canal Road, and terminate at the intersection of Old Canal Road and Eastpark Drive.

3.1.1.2 Current Use(s) of the Subject Site
Currently, the subject site consists of roadways (Yorba Linda Boulevard, Savi Ranch Parkway, Mirage Street, and Old Canal Road); as well as areas of permanent ROW acquisition, which consist of vacant portions of commercial (Staples, Sprouts, PetSmart, Taco Bell) land uses; refer to Table 1-1.

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3.1.1.3 Description of On-Site Structures and Roads
A description of the existing roadways on-site is provided below:
• Savi Ranch Parkway: Savi Ranch Parkway between Yorba Linda Boulevard and Mirage Street consists of two westbound lanes and two eastbound lanes divided by a raised median. The eastbound Savi Ranch Parkway at the Mirage Street intersection is signalized and includes two left-turn lanes, one through lane, and one free-right turn lane. The westbound Savi Ranch Parkway intersection with Yorba Linda Boulevard is signalized and consists of two right turn lanes and two left turn lanes. • Yorba Linda Boulevard: Yorba Linda Boulevard includes three through lanes in each direction within the project area. The intersection of Yorba Linda Boulevard and Savi Ranch Parkway is signalized; northbound Yorba Linda Boulevard at Savi Ranch Parkway currently consists of one left-turn lane, three through lanes, and a free-right turn lane.

Southbound Mirage Street at the Old Canal Road consists of one right-turn lane and one shared lane for-through traffic or left turns. Northbound Mirage Street at Old Canal Road consists of one-through lane.
• Old Canal Road: Old Canal Road within the project area has one through lane in each direction separated by a shared center turn lane. The intersection of Old Canal Street and Mirage Street is four-way stop controlled. Westbound Old Canal Road consists of one left turn, one through lane, and one right turn lane, and eastbound Old Canal Road consists of one left turn and one through lane.

As detailed in Table 1-1, proposed permanent ROW acquisition areas include the landscaped and/or paved areas of commercial uses (APNs 352-112-03 [Staples, located at 5511 Mirage Street], 352-112-04 [PetSmart, located at 5521 Mirage Street], 352-113-02 [Sprouts, located at 22401 Old Canal Road], and 352-117-01, -02, and -03 [Taco Bell, located at 22300 Old Canal Road]) as well as landscaped and/or paved areas of surface parking lot at APN 352-113-01; refer to Table 1-1.

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-3 Proposed partial ROW acquisition areas a consist of also landscaped and/or paved areas (including surface parking lot) associated with off-site commercial structures.

3.1.2 TOPOGRAPHY
The USGS maps show geological formations and their characteristics, describing the physical setting of an area through contour lines and major surface features including lakes, rivers, streams, buildings, landmarks, and other factors that impact the spread of contamination.

Additionally, the maps depict topography through color and contour lines and are helpful in determining elevations and site latitude and longitude.

Based on the USGS’ Black Star Canyon, Prado Dam, Orange, and Yorba Linda quadrangles, all dated 2022, on-site topography is approximately 320 to 360 feet above mean sea level (msl) and generally sloping down-gradient to the northwest towards the Santa Ana River, which flows in a southwestern direction. According to the EDR GeoCheck Report (provided in Appendix B, Database Records Searches), the subject site is at approximately 340 feet above msl on average. The Santa Ana River flows towards Santa Ana River Lake approximately five miles southwest of the subject site, and ultimately into the Pacific Ocean further southwest. No on-site pits, ponds, or lagoons are noted within the boundaries of the subject site. Other built features in the general area include SR-91 to the south.

3.1.3 CURRENT USES OF ADJOINING PROPERTIES
For the scope of this Phase I ISA, properties are defined and categorized based upon their physical proximity to the subject site. An adjoining property is considered any real property or properties the border of which is contiguous or partially contiguous with that of the subject site, or that would be contiguous or partially contiguous with that of the subject site but for a street, road, or other public thoroughfare separating them. The subject site is surrounded by urban development including commercial, industrial, residential, open space/recreation, and transportation uses.

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-4 • South: SR-91 ROW is situated to the south of the subject site, in addition to commercial uses (i.e., Taco Bell, McDonalds, Chick-fil-A, Denny’s, Maserati of Anaheim Hills, Ayres Suites Yorba Linda, and Extended Stay America); and
• West: Commercial (i.e., J Star Chrysler Dodge Jeep Ram of Anaheim Hills, Aero Mobility, Valvoline Instant Oil Change, 76 gas station, etc.) are located to the west.

3.1.4 GEOLOGIC CONDITIONS

3.1.4.1 Geology
The USGS Geological Map Index was searched by EDR for available Geological Maps that cover the subject site and surrounding areas. These Geological Maps indicate geological formations that are overlaid on a topographic map. Some maps focus on specific issues (i.e., bedrock, sedimentary rocks, etc.) while others may identify artificial fills (including landfills). Geological maps can be effective in estimating permeability and other factors that influence the spread of contamination.

According to the EDR GeoCheck Report (provided in Appendix B), the subject site consists of stratified sequence (sedimentary rocks) from the Cenozoic era.

3.1.4.2 Soils
The U.S. Department of Agriculture’s (USDA) Soil Conservation Service (SCS) leads the National Cooperative Soil Survey (NCSS) and is responsible for collecting, storing, maintaining and distributing soil survey information for privately owned lands in the United States. A soil map in a soil survey is a representation of soil patterns in a landscape.

The USDA SCS Soil Survey Maps were searched for available soils within the subject site; refer to Appendix C, Documentation.
• San Emigdio fine sandy loam, 0 to 2 percent slopes (194): Approximately 3.4 acres (52 percent) of this soil is included in the subject site and/or proposed ROW acquisition areas.

This well-drained soil has a very low runoff class and generally occurs on alluvial fans with alluvium derived from sedimentary rocks.
• Yorba cobbly sandy loam, 9 to 30 percent slopes (225): Approximately 1.7 acres (25.7 percent) of this soil is included in the subject site and/or proposed ROW acquisition areas.

This well-drained soil generally occurs on terraces with sandy and gravelly alluvium.

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-5 • Riverwash (191): Approximately 1.2-acre (18.3 percent) of this soil is included in the subject site and/or proposed ROW acquisition areas. This well-drained soil has a negligible runoff class and generally occurs on fans with sandy and gravelly alluvium. • San Emigdio fine sandy loam, 2 to 9 percent slopes (195): Approximately 0.2-acres (3.5 percent) of this soil is included in the subject site and/or proposed ROW acquisition areas.

This well-drained soil has a low runoff class and generally occurs on alluvial fans with mixed alluvium derived from igneous, metamorphic and sedimentary rock. • Mocho sandy loam, 0 to 2 percent slopes (165): Nominal (approximately 0.5-percent) amount of this soil is included in the subject site and/or proposed ROW acquisition areas.

This well-drained soil has a low runoff class and generally occurs on alluvial fans with alluvium derived from sedimentary rocks.

3.1.4.3 Radon
Radon is a radioactive gas that is found in certain geologic environments and is formed by the natural breakdown of radium, which is found in the earth’s crust. Radon is an invisible, odorless, inert gas that emits alpha particles, known to cause lung cancer. Radon levels are highest in basements (areas in close proximity to the soil) that are poorly ventilated. A radon survey was not included within the scope of this investigation.

According to the EDR GeoCheck Report (provided in Appendix B), the subject site is located within Zone 3, which has a predicted average indoor screening level of less than 2.0 Picocuries per liter (pCi/L). EPA recommends remedial actions when radon levels are greater than 4.0 pCi/L.

3.1.5 BIOLOGICAL SETTING
Currently, the subject site consists of paved roadways and shoulder/sidewalk, and/or ornamental landscaping. Areas of permanent ROW acquisition consist of ornamentallylandscaped vacant areas associated with off-site commercial uses (i.e., Staples, Sprouts, PetSmart, Taco Bell); refer to Table 1-1.

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3.1.6 DRAINAGE/HYDROLOGY

3.1.6.1 Drainage
As discussed above under Section 3.1.2, Topography, on-site topography is approximately 320 to 360 feet above msl generally sloping down-gradient to the northwest towards the Santa Ana River. The Santa Ana River flows towards Santa Ana River Lake approximately five miles southwest of the subject site, and ultimately into the Pacific Ocean.

Drainage of the subject site is accomplished by overland sheet flow, into the municipal stormwater system.

3.1.6.2 Flood Hazards
Flood Prone Area Maps published by the USGS show areas prone to 100-year floods overlaid on a topographical map. These maps are not considered the official Federal Emergency Management Agency (FEMA) flood maps; therefore, in cases where a property is located immediately adjacent to or within the flood prone boundary, a FEMA map should be obtained.

According to the FEMA Flood Insurance Rate Map (FIRMette), the subject site is not located within a 100-year flood zone. The majority of the subject site is located within Zone X/0.2 Percent Annual Flood Hazard Area. A portion of the subject site along Yorba Linda Boulevard (as well as off-site areas to the west of Yorba Linda Boulevard) are located within Zone X/Area with Reduced Flood Risk due to Levee (refer to Appendix C). Zone X is defined as areas with a 0.2- percent annual chance flood hazard, and areas of one-percent annual chance flood with average depth less than one foot or with drainage areas of less than one square mile.

3.1.6.3 Groundwater
Michael Baker assumes that groundwater flow would follow the slope of the ground surface elevations towards the nearest open body of water or intermittent stream. The direction of this flow on-site is expected to be generally in a northwesterly direction towards the Santa Ana River, then southwest following the river. Further, according to the Water Quality Technical Memorandum, exploratory borings encountered groundwater at depths between 27 and 31 feet in the subject site boundaries.

3.1.6.4 Water Wells
According to the EDR GeoCheck Report (Appendix B), one water well is noted within the boundaries of the subject site. However, based on interviews conducted with the City's Project

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-7 Manager, Rick Yee, on June 1, 2025, no water wells are present on-site. Multiple water wells were reported within a one-mile radius of the subject site.

3.1.6.5 Oil Wells/Pipelines
According to the EDR GeoCheck Report (Appendix B), no oil/gas wells are noted within the boundaries of the subject site; a total of 11 oil/gas wells were reported within a one-mile radius of the subject site.

According to the California Department of Conservation Geologic Energy Management Division’s (CalGEM) online mapping application Well Finder, one idle oil well is noted approximately 1,820 feet north of the subject site across the Santa Ana River (refer to Appendix C). Based on interviews conducted with the City's Project Manager, Rick Yee, on June 1, 2025, no oil wells are present on-site.

According to the United States Department of Transportation’s National Pipeline Mapping System (NPMS), no active natural gas transmission pipelines or hazardous liquid pipelines are noted within the boundaries, or within 100 feet, of the subject site (refer to Appendix C). The nearest active hazardous liquid pipeline is situated approximately one-mile west of the subject site along Esperanza Road.

3.2 STANDARD ENVIRONMENTAL RECORDS

SOURCES
The governmental sources have been searched by EDR (at the request of Michael Baker) for sites within the subject site and within an approximate one-mile radius of the subject site boundaries.

Upon completion of their search, EDR provided Michael Baker with their findings dated April 30, 2025. Michael Baker makes no claims as to the completeness or accuracy of the referenced sources. Our review of EDR’s findings can only be as current as their listings and may not represent all known or potential hazardous waste or contaminated sites. To reduce the potential for omitting possible hazardous material sites on the subject site and within the surrounding area, sites may be listed in this report if there is any doubt as to the location because of discrepancies in map location, zip code, address, or other information. Refer to Appendix B, for a listing and description of the Federal, tribal, State, and local records searched. Refer to Exhibit 6, Overview Map, for a map with listed sites relative to the subject site.

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EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc.EDR Inc. 0-69 kV

SAVI RANCH PARKWAY WIDENING/CONNECT SAVI RANCH PROJECT

PHASE I INITIAL SITE ASSESSMENT
Exhibit 6
Overview Map NOT TO SCALE
05/2025 • JN 204674 Page 784 of 2424
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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-9

3.2.1 SUBJECT SITE
The lists that were reviewed by EDR reported no regulatory properties within the subject site boundaries. Refer to Appendix B, for a complete listing of all listed properties.

3.2.2 OFF-SITE PROPERTIES
The lists identified multiple off-site regulatory properties within a one-mile radius of the subject site. For a complete list of sites identified and their status, refer to Appendix B. Distance from the subject site, direction of anticipated groundwater flow, and/or site status were considered to determine the potential impact on the subject site.

Adjoining Properties
There are 11 regulatory properties reported adjoining the subject site. Of the 15 adjoining properties, three listed adjoining regulatory sites are situated on properties proposed for permanent ROW acquisition. However, the areas of ROW acquisition encompass areas of ornamental landscaping and paved/surface parking lot areas; no areas within the boundaries of the subject site are associated with active land use areas. Refer to Table 3-1, Database Summaries, for a description of the regulatory databases reported in association with the listed properties.

Refer to Table 3-2, Identified Regulatory Sites of Concern, for further evaluation of the listed properties.

Adjacent Properties
No properties was reported adjacent to the subject site and also presents a potential concern to soil, soil gas, and/or groundwater underlying the subject site due to the site status, distance/location, and/or no release was reported. Refer to Appendix B for a complete listing of all adjacent properties reported.

Table 3-1
Database Summaries
Database Description
AST
[Lists of state and tribal registered
storage tanks]
Aboveground Petroleum Storage Tank Facilities. List of aboveground petroleum storage tank locations.

CERS
[Other Ascertainable Records]
The CalEPA Regulated Site Portal database combines data about environmentally regulated sites and facilities in California into a single database. It combines data from a variety of state and federal databases, and provides an overview of regulated activities across the spectrum of environmental

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-10 Database Description
programs for any given location in California. These activities include hazardous materials and waste, state and federal cleanups, impacted ground and surface waters, and toxic materials

CERS HAZ WASTE
[Local Lists of Hazardous Waste /
Contaminated Sites]
List of sites in the California Environmental Protection Agency (CalEPA) Regulated Site Portal which fall under the Hazardous Chemical Management, Hazardous Waste Onsite Treatment, Household Hazardous Waste Collection, Hazardous Waste Generator, and RCRA LQ HW Generator programs.

Update quarterly.

CERS TANKS
[Local Lists of Registered Storage
Tanks]
California Environmental Reporting System (CERS) Tanks is a list of sites in the California Environmental Protection Agency (CalEPA) Regulated Site Portal which fall under the Aboveground Petroleum Storage and Underground Storage Tank regulatory programs.

CIWQS
[Other Ascertainable Records]
The California Integrated Water Quality System (CIWQS) is a computer system used by the State and Regional Water Quality Control Boards to track information about places of environmental interest, manage permits and other orders, track inspections, and manage violations and enforcement activities.

DRY CLEANERS
[Other Ascertainable Records]
A list of drycleaner related facilities that have EPA ID numbers. These are facilities with certain SIC codes: power laundries, family and commercial; garment pressing and cleaner's agents; linen supply; coin-operated laundries and cleaning; drycleaning plants, except rugs; carpet and upholster cleaning; industrial launderers; laundry and garment services. Update annually.

ECHO
[Other Ascertainable Records]
Enforcement & Compliance History Information (ECHO) provides integrated compliance and enforcement information for about 800,000 regulated facilities nationwide. Update quarterly.

EDR Hist Auto
[EDR High Risk Historical
Records]
EDR Exclusive Historical Auto Stations: EDR has searched selected national collections of business directories and has collected listings of potential gas station/filling station/service station sites that were available to EDR researchers. EDR's review was limited to those categories of sources that might, in EDR's opinion, include gas station/filling station/service station establishments. The categories reviewed included, but were not limited to gas, gas station, gasoline station, filling station, auto, automobile repair, auto service station, service station, etc. This database falls within a category of information EDR classifies as "High Risk Historical Records", or HRHR. EDR's HRHR effort presents unique and sometimes proprietary data about past sites and operations that typically create environmental concerns, but may not show up in current government records searches.

E MANIFEST
[Other Ascertainable Records]
EPA established a national system for tracking hazardous waste shipments electronically. This system, known as e-Manifest, will modernize the nation’s cradle-to-grave hazardous waste tracking process while saving valuable time, resources, and dollars for industry and states.

FINDS
[Other Ascertainable Records]
Facility Index System (FINDS) contains both facility information and 'pointers' to other sources that contain more detail. EDR includes the following FINDS databases in this report: PCS (Permit Compliance System), AIRS (Aerometric Information Retrieval System), DOCKET (Enforcement Docket used to manage and track information on civil judicial enforcement cases for all environmental statutes), FURS (Federal Underground Injection Control), C-DOCKET (Criminal Docket System used to track criminal enforcement actions for all environmental statutes), FFIS (Federal Facilities Information System), STATE (State Environmental Laws and Statutes), and PADS (PCB Activity Data System).

Update quarterly.

HAZNET
[Other Ascertainable Records]
Facility and Manifest Data. The data is extracted from the copies of hazardous waste manifests received each year by the DTSC. The annual volume of manifests is typically 700,000 - 1,000,000 annually, representing approximately 350,000 - 500,000 shipments. Data are from the manifests submitted without correction, and therefore many contain some invalid values for data elements such as generator ID, TSD ID, waste category, and disposal method. This database begins with calendar year 1993.

HWTS
[Other Ascertainable Records]
DTSC maintains the Hazardous Waste Tracking System (HWTS) that stores ID number information since the early 1980s and manifest data since 1993. The system collects both manifest copies from the generator and destination facility.

RCRA NonGen/NLR
[Other Ascertainable Records]
RCRAInfo is EPA’s comprehensive information system, providing access to data supporting the Resource Conservation and Recovery Act (RCRA) of 1976 and the Hazardous and Solid Waste

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Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-11 Database Description
Amendments (HSWA) of 1984. The database includes selective information on sites which generate, transport, store, treat and/or dispose of hazardous waste as defined by the Resource Conservation and Recovery Act (RCRA). Non-Generators do not presently generate hazardous waste.

RCRA-LQG
[Lists of Federal RCRA
generators]
RCRA-LQG: RCRAInfo is EPA’s comprehensive information system, providing access to data supporting the Resource Conservation and Recovery Act (RCRA) of 1976 and the Hazardous and Solid Waste Amendments (HSWA) of 1984. The database includes selective information on sites which generate, transport, store, treat and/or dispose of hazardous waste as defined by the Resource Conservation and Recovery Act (RCRA). Large quantity generators (LQGs) generate over 1,000 kilograms (kg) of hazardous waste, or over 1 kg of acutely hazardous waste per month.

RCRA-SQG
[Lists of Federal RCRA
generators]
RCRA-SQG: RCRAInfo is EPA’s comprehensive information system, providing access to data supporting the Resource Conservation and Recovery Act (RCRA) of 1976 and the Hazardous and Solid Waste Amendments (HSWA) of 1984. The database includes selective information on sites which generate, transport, store, treat and/or dispose of hazardous waste as defined by the Resource Conservation and Recovery Act (RCRA). Small quantity generators (SQGs) generate between 100 kg and 1,000 kg of hazardous waste per month.

UST
[Lists of state and tribal registered
storage tanks]
The Underground Storage Tank database contains registered USTs. USTs are regulated under Subtitle I of the Resource Conservation and Recovery Act (RCRA). The data come from the State Water Resources Control Board’s Hazardous Substance Storage Container Database.

UST FINDER
[Other Ascertainable Records]
EPA developed UST Finder, a web map application containing a comprehensive, state-sourced national map of underground storage tank (UST) and leaking UST (LUST) data. It provides the attributes and
locations of active and closed USTs, UST facilities, and LUST sites from states and from Tribal lands and US territories . UST Finder contains information about proximity of UST facilities and LUST sites to: surface and groundwater public drinking water protection areas; estimated number of private domestic wells and number of people living nearby; and flooding and wildfires.

Table 3-2
Identified Regulatory Sites of Concern
EDR
Map
ID#1
Site Name(s) and Address(es)
Direction
from
Subject Site
Regulatory
Database EDR Site Status
Potential for an
REC on the
Subject Site?
20 21

STAPLES THE
OFFICE

SUPERSTORE

EAST INC
STORE 0304 /

STAPLES THE
OFFICE

SUPERSTORE
#0304
5511 MIRAGE
ST
Adjoining
(associated
with ROW
acquisition)

CERS HAZ WASTE

E MANIFEST
RCRA NonGen / NLR
This site is on-site associated with ROW
acquisition (APN 352-112-03). Reported
as a facility that generates waste from
consumer product returns and broken
items. No violations or release reported
Yes; records
were
requested for
this site. Refer
to Section 3.3,
File Record
Review,
below.
17 18
19 PETSMART
#0098 /

PETSMART /

MEDICAL

MANAGEMEN
T

INTERNATION
5521 MIRAGE
ST
Adjoining
(associated
with ROW
acquisition)

CERS HAZ WASTE
RCRA NonGen / NLR

E MANIFEST
This site is on-site associated with ROW
acquisition (APN 352-112-04). Medical
Management International Inc Dba
Banfield Pet Hospital #0098 was reported
at this address from 2018 through 2021;
this facility was reported for storage,
Yes; records
were
requested for
this site. Refer
to Section 3.3,
File Record

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Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-12 EDR
Map
ID#1
Site Name(s) and Address(es)
Direction
from
Subject Site
Regulatory
Database EDR Site Status
Potential for an
REC on the
Subject Site?

AL INC DBA

BANFIELD
bulking and/or transfer waste medicine off
site.

The PetSmart facility currently generates
retail hazardous waste. Hazardous waste
containers were stored closed and
properly labeled. No indication of illegal
disposal was observed.

Review,
below.

B3
B4

SPROUTS/

SPROUTS

FARMERS
MARKET
22401 OLD

CANAL ROAD
Adjoining
(associated
with ROW
acquisition)
CERS

CERS HAZ WASTE

E MANIFEST
HAZNET
HWTS
RCRA NonGen / NLR
This property is on-site associated with
ROW acquisition (APN 352-113-02). This
site is reported for storage, bulking, and/or
transfer waste off-site without treatment/
recovery. Reported on CERS for
administrative violations on reporting. No
release reported.

Yes; records
were
requested for
this site. Refer
to Section 3.3,
File Record
Review,
below.

CHARMILLES

TECHNOLOGI
ES
22667 OLD
CANAL RD Adjoining DRYCLEANERS
This property is an adjoining use. This is
former drycleaner was reported active
from 2002 until 2012. No release reported.

Yes; records
were
requested for
this site. Refer
to Section 3.3,
File Record
Review,
below.

C5
23 24
COSTCO

WHOLESALE
#445 (GAS

STATION)
5500 MIRAGE
ST Adjoining
CERS

CERS HAZ WASTE

CERS TANKS
UST

UST FINDER
This site is an adjoining use. This site has
four double-walled USTs installed around
2014. These USTs contain regular and
premium unleaded petroleum as well as
other petroleum on UST FINDER. This site
is also reported to store one 55 gal. drums
of Waste Gasoline and one 55 gal. drum
of Waste Gasoline Debris in Oct 2024.

In 2019, reported on CERS for failure to
keep water out of the secondary
containment of UST systems as the 87B
turbine sump was observed with
approximately 1/2 gallon of fuel; this site
has returned to compliance on
10/30/2019.

In 2023, reported on CERS as the spill
bucket for the fuel additive failed initial
testing; this site has returned to
compliance on 10/12/2023.

Yes; records
were
requested for
this site. Refer
to Section 3.3,
File Record
Review,
below.

E7
E8
34 AERO

MOBILITY INC
/
1001 N WEIR

CANYON RD /
1001 N WEIR
CANYON BLVD Adjoining
AST
CERS

CERS HAZ WASTE

E MANIFEST
HAZNET
This site is an adjoining use. A 1,660
gallons AST was reported on AST.

Reported on E Manifest to handle nonRCRA hazardous waste solid (oily solid waste/used metal oil filters); no violations
Yes; records
were
requested for
this site. Refer
to Section 3.3,

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Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-13 EDR
Map
ID#1
Site Name(s) and Address(es)
Direction
from
Subject Site
Regulatory
Database EDR Site Status
Potential for an
REC on the
Subject Site?
WEIR
CANYON

CHEVROLET
HWTS
RCRA NonGen / NLR
in this regard were found. Reported for
administrative violations on CERS. No
release.

File Record
Review,
below.

E9
E10
E11
E12

VALVOLINE

INSTANT OIL
CHANGE
GN0043
985 N WEIR

CANYON RD /
985 N WEIR
CANYON BLVD Adjoining
AST
CERS

CERS HAZ WASTE

CERS TANKS

E MANIFEST
RCRA NonGen / NLR
This site is an adjoining use. A 1,987
gallons AST was reported on AST. A 55
gallon of non-RCRA hazardous waste
liquid was reported on E Manifest. No
release.

Yes; records
were
requested for
this site. Refer
to Section 3.3,
File Record
Review,
below.

E13
14 15
16 26

SAVI RANCH
CIRCLE K 76 /

SAVY RANCH
UNION 76

CIRCLE K
945 N WEIR

CANYON RD /
945 N WEIR
CANYON BLVD Adjoining
CERS

CERS TANKS
EDR Hist Auto
HWTS
RCRA NonGen / NLR

CERS HAZ WASTE
UST

UST FINDER
This site is an adjoining use. Three USTs
reported in use on UST. As reported on
UST FINDER, one 20,000-gallon tank
containing regular unleaded petroleum;
one 8,000-gal tank containing diesel fuel;
and one 12,000 premium unleaded.

Reported on EDR HIST AUTO from 2003
through 2014 as a gasoline service station.

Reported several times for failure of the
leak detection equipment to be installed,
calibrated, operated, and/or maintained
properly. No release reported.

Yes; records
were
requested for
this site. Refer
to Section 3.3,
File Record
Review,
below.
22 JOHN FORCE

RACING INC
22722 OLD
CANAL RD Adjoining

E MANIFEST
ECHO
FINDS
HAZNET
HWTS

RCRA-SQG
This site is an adjoining use. Reported as
a Small Quantity Generator. Reported on
HAZ NET for the storage, bulking, and/or
transfer of unspecified organic liquid
mixture, unspecified solvent mixture,
liquids with halogenated organic
compounds > 1000 mg/l, and oil/water
separation sludge, off site without
treatment or recovery. No release found.

Yes; records
were
requested for
this site. Refer
to Section 3.3,
File Record
Review,
below.
27 KAISER

FOUNDATION
HOSPITALYORBA LINDA

MEDICAL

OFFICES
22550 SAVI
RANCH PKW Adjoining

E MANIFEST

RCRA-LQG
This site is an adjoining use. Reported for
handling various typical hospital related
chemical
Yes; records
were
requested for
this site. Refer
to Section 3.3,
File Record
Review,
below.
29 30
31 COSTCO #445
/
COSTCO

WHOLESALE
#445
22633 SAVI
RANCH
PARKWAY Adjoining
CERS

CERS HAZ WASTE
CIWQS

E MANIFEST
ECHO
FINDS
HAZNET
This site is an adjoining use. Reported as
a small quantity generator handling
various chemicals, including metal sludge.

Also reported for the storage, bulking,
and/or transfer of off-specification, aged or
surplus organics off site. Admin violations
found. No release history.

Yes; records
were
requested for
this site. Refer
to Section 3.3,
File Record

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Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-14 EDR
Map
ID#1
Site Name(s) and Address(es)
Direction
from
Subject Site
Regulatory
Database EDR Site Status
Potential for an
REC on the
Subject Site?
HWTS

RCRA-SQG
Review,
below.

3.2.3 UNMAPPED PROPERTIES
According to EDR’s ESA Report Desktop Reference, dated 1996, some reported sites are unmappable as exact locations remain undefined. Listings in publicly available records, which do not have adequate address information, are not generally considered practically reviewable.

For the purposes of this Phase I ISA, practically reviewable is defined as information provided in a manner and in a form that yields information without the need for extraordinary analysis of irrelevant data. Although the location of these sites may be unknown, the site and detail information are often available through EDR.

Michael Baker’s review of Unmapped Properties consisted of a verification, based solely on the professional judgment of the Environmental Professional, that the subject site is not listed (i.e., referenced by name or street address) and a review to identify if any of the Unmapped Properties cause a likely potential to create an REC within the boundaries of the subject site. Three unmapped properties appear to be present in the general vicinity; refer to Appendix B. Among these sites, Kramer Oil Field (listed at Esperanza Road) was part of the adjacent properties described below and California Cleaners (listed at 22224 #B East La Palma Avenue) appears to be of greater than 1,700 feet from the subject property (too far to likely impact the subject property).

3.3 FILE RECORD REVIEWS
If the subject site or any of the adjoining properties are identified on one or more of the standard environmental record sources, pertinent regulatory files and/or records associated with the listing should be reviewed. The purpose of the regulatory file review is to obtain sufficient information to assist the environmental professional in determining if a REC, HREC, CREC, or a de minimis condition exists at the property in connection with the listing. If, in the environmental professional’s opinion, such a review is not warranted, the environmental professional must explain the justification for not conducting the regulatory file review.

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Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-15

3.3.1 AGENCY FILE REQUESTS
Michael Baker requested files for all properties listed in Table 3-2 from the following agencies:
• Department of Toxic Substances Control (DTSC): Michael Baker requested files on May 6, 2025. An email response was received on May 6, 2025, stating that no records pertaining to the sites/facilities referenced were found; refer to Appendix B. Michael Baker reviewed available DTSC records obtained online.
• Orange County Health Care Agency (HCA) Environmental Health Division (DEH):

Michael Baker requested files on May 6, 2025 via the “Request for Public Records” online portal. From May 6, 2025 to May 8, 2025, staff requested further clarifications regarding the requested addressed. On May 16, 2025, staff notified Michael Baker that the agency needs an extension of time to prepare its initial response, and such response will be provided on or before May 30, 2025. An email response was received on May 28, 2025, providing links to digital records available; refer to Appendix B. Michael Baker reviewed available records obtained online.
• Santa Ana Regional Water Quality Control Board (Santa Ana RWQCB): Michael Baker contacted staff on May 6, 2025 and May 15, 2025 to inquire about available files for identified regulatory sites; refer to Appendix C. An email response was received on May 6, 2025 and May 20, 2025, stating that, for those properties that have records, the requested records are available online.
• Anaheim Fire & Rescue (Anaheim Fire): Michael Baker requested files on May 15, 2025 via the “Request for Public Records” online portal. An email response was received on May 27, 2025, stating that the agency needs an additional fourteen days to respond; refer to Appendix B. No other responses have been received at this time.

3.3.2 FILES RECEIVED
Files were received from one or more of these agencies and/or obtained via their online databases. Refer to Appendix B for copies of records reviewed.

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Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-16

3.3.3 FILE REVIEW CONDUCTED

3.3.3.1 CHARMILLES TECHNOLOGIES (22667 OLD CANAL ROAD)
This facility adjoins the subject site to the north (of Old Canal Road, near the eastern terminus).

This facility is listed on EDR as a former drycleaner active from 2002 until 2012. No violations or releases were reported on EDR. No releases were reported at this property.

3.3.3.2 SPROUTS FARMERS MARKET (22401 OLD CANAL ROAD)
This facility is located on APN 352-113-02 and is associated with areas of ROW acquisition. Areas of acquisition encompass ornamental landscaping areas. The Sprouts facility/areas of operation are situated off-site at this property. Therefore, this listed property is considered off-site, adjoining. This facility is reported for the storage, bulking, and/or transfer of typical retail waste (waste from returned and/or broken retail items) off-site without treatment/recovery. Several administrative violations were reported, mostly related to hazardous materials documentation.

No releases were reported at this property.

3.3.3.3 COSTCO WHOLESALE #445 (GAS STATION) (5500 MIRAGE STREET) This facility adjoins the site to the north (of Mirage Street near the northern terminus). This facility is identified as the Costco gasoline service station in use since at least 2014. Four double-walled underground storage tanks (USTs) were reported to be installed at this site in 2014. Based on UST FINDER, these USTs contain regular and premium unleaded petroleum as well as other types of petroleum. This site was also reported to store a 55-gallon drum of waste oil and a 55-gallon drum of waste oil debris in October 2024. In 2019, this facility was reported on CERS for failure to keep water out of the secondary containment of UST systems as the turbine sump was observed with approximately half gallon of fuel; this site has returned to compliance on October 30, 2019. In 2023, this facility was again reported on CERS as the spill bucket for the fuel additive failed initial testing; this site has returned to compliance on October 12, 2023. Several other administrative violations were reported, mostly related to hazardous materials documentation. No releases were reported. As this facility contain USTs, this facility is regulated by the OC Environmental Health Division.

3.3.3.4 COSTCO WHOLESALE #445 (22633 SAVI RANCH PARKWAY) This facility adjoins the site to the north (of Mirage Street near the northern terminus). This facility is identified as General Merchandise Stores. This facility was reported as a small quantity generator handling non-RCRA hazardous liquid (water-based products), potentially waste from consumer product returns, as well as metal sludge, possibly from handling lead acid batteries.

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Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-17 This site is also reported for the storage, bulking, and/or transfer of off-specification, aged or surplus organics off site. Several administrative violations were reported, mostly related to hazardous materials documentation. No releases were reported at this property.

3.3.3.6 AERO MOBILITY INC / WEIR CANYON CHEVROLET (1001 NORTH

WEIR CANYON BOULEVARD)
This facility adjoins the subject site to the west across Yorba Linda Boulevard. This site has been an automobile dealership with related service bays since at least 2005. Based on EDR, this facility was a Chevrolet dealership from 2005 to 2009; Aero Mobility Inc. (also an automobile dealership) is the current occupant and has reported as a handler, not a generator, of non-RCRA hazardous waste solid (oily solid waste/used metal oil filters) since 2019. Automobile services usually involve the storage and handling of hazardous materials related to automotive maintenance activities.

Based on EDR, the previous occupant Chevrolet reported the presence of a 1,660-gallon aboveground storage tank (AST). No violations in this regard were reported for Chevrolet; however, several administrative violations were reported under Aero Mobility Inc pertaining to maintenance of documentation. No releases were reported at this property.

3.3.3.7 VALVOLINE INSTANT OIL CHANGE GN0043 (985 N WEIR CANYON

BOULEVARD)
This facility adjoins the subject site to the west across Yorba Linda Boulevard. This facility provides oil change services which typically involve handling of hazardous materials. A 1,987- gallon AST containing unknown materials was reported on AST. Additionally, a 55-gallon non RCRA hazardous waste liquid was also reported. No releases were reported at this property.

3.3.3.8 SAVI RANCH CIRCLE K 76 (945 NORTH WEIR CANYON BOULEVARD) This facility adjoins the subject site to the southwest across Yorba Linda Boulevard. Three USTs were reported in use. As reported on UST FINDER, this facility houses one 20,000-gallon tank containing regular unleaded petroleum; one 8,000-gallon tank containing diesel fuel; and one 12,000-gallon tank containing premium unleaded. This facility was reported on EDR HIST AUTO from 2003 through 2014 as a gasoline service station. Several violations involving failure of the leak detection equipment to be installed, calibrated, operated, and/or maintained properly were reported. No releases were reported at this property.

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Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-18

3.3.3.9 PETSMART #0098 / MEDICAL MANAGEMENT INTERNATIONAL INC DBA BANFIELD (5521 MIRAGE STREET)
This facility is located on APN 352-112-04 and is associated with areas of ROW acquisition.

Therefore, this listed property is considered on-site. Medical Management International Inc Dba Banfield Pet Hospital #0098 was reported at this address from 2018 through 2021; this facility was reported for the storage, bulking and/or transfer of waste medicine off site. The current occupant - PetSmart - is reported for the storage, bulking, and/or transfer of typical retail waste (waste from returned and/or broken retail items) off-site without treatment/recovery. Hazardous waste containers were stored closed and properly labeled. No indication of illegal disposal was observed. No releases were reported at this property.

3.3.3.10 STAPLES THE OFFICE SUPERSTORE #0304 (5511 MIRAGE STREET) This facility is located on APN 352-112-03 and is associated with areas of ROW acquisition.

Therefore, this listed property is considered on-site. This facility is reported for the storage, bulking, and/or transfer of typical retail waste (waste from returned and/or broken retail items) off-site without treatment/recovery generates waste from consumer product returns and broken items. No violations or releases were reported at this property.

3.3.3.11 JOHN FORCE RACING INC (22722 OLD CANAL ROAD)
This facility adjoins the subject site to the southeast (of Old Canal Road, near the eastern terminus). This facility was reported as a Small Quantity Generator and handler of tetrachloroethylene (liquid), unspecified organic liquid mixture, unspecified solvent mixture, liquids with halogenated organic compounds, and oil/water separation sludge. No releases were reported at this property.

3.3.3.13 KAISER FOUNDATION HOSPITAL-YORBA LINDA MEDICAL OFFICES (22550 SAVI RANCH PARKWAY)
This facility adjoins the subject site to the east (of Mirage Street). This facility provides medical services and is listed in RCRA Listings as a large quantity generator. Variations of medical-related chemicals were reported at this site. No releases were reported at this property.

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Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-19

3.4 HISTORICAL USE INFORMATION ON THE

SUBJECT SITE AND ADJOINING PROPERTIES
The objective of consulting historical sources is to develop a history of the previous uses of the property and surrounding area, in order to help identify the likelihood of past uses having led to RECs in connection with the property. The Environmental Professional shall exercise professional judgment and consider the possible releases that might have occurred at a property in light of the historical uses and, in concert with other relevant information gathered as part of the Phase I ISA process, use this information to assist in identifying RECs (discussed in Section 6.0, Evaluation, of this Phase I ISA).

Sources of historical information identified by ASTM E 1527-21 can include library information, historical societies, government agencies, local building permit/inspection department records, current owners and occupants of the subject site or vicinity, local government officials or employees with knowledge of the subject site, map preparation companies, private resellers of historical property information, and prior assessments. The standard historical resources identified by ASTM E 1527-21 include data, imagery, documents, records, and other resources that typically provide useful information about the historical uses of properties. Typically, reasonably ascertainable standard historical resources include aerial photographs, fire insurance maps, local street directories, topographic maps, building department records, interviews, property tax files, zoning/land use records, and other historical sources (i.e., any source or sources, other than those listed, that are credible to a reasonable person and that identify past uses of properties). The focus is on usage rather than ownership, which is why a chain-of-title is not sufficient by itself.

3.4.1 METHODOLOGY AND LIMITING CONDITIONS

3.4.1.1 Methodology
Data failure (a subset of a data gap) occurs when all of the standard historical sources that are reasonably ascertainable and likely to be useful have been reviewed and yet the historical source review objectives have not been met.

INTERVALS
Review of standard historical sources at less than approximately five year intervals is not required by ASTM E 1527-21 Standard Practice. If the specific use of the property appears unchanged over a period longer than five years, then it is not required by ASTM E 1527-21 Standard Practice to research the use during that period.

Page 795 of 2424 ends

Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-20 Michael Baker was unable to identify, within a five-year interval, the year (between 1966 and 1972) that the southern portion of the site along Yorba Linda Boulevard has been developed.

USES OF THE PROPERTY
Per ASTM E 1527-21 Standard Practice, “All obvious uses of the subject property shall be identified from the present, back to the subject property’s first developed use, or back to 1940, whichever is earlier.” The term “developed use” includes agricultural uses and placement of fill dirt, and other uses that may not involve structures. This task requires reviewing only as many of the standard historical sources as are necessary and both reasonably ascertainable and likely to be useful. Sources reviewed have been cited throughout this section and are referenced in Section 7.0, References, of this Phase I ISA.

Historical information for the subject site was obtained from 1901 to the present, at which time, the subject site consisted of vacant land and a roadway.

USES OF ADJOINING PROPERTIES
Per the ASTM E 1527-21 Standard Practice, during research of the subject site, uses of the adjoining properties that are obvious shall be identified to evaluate the likelihood that past uses of the adjoining properties have led to a REC, in connection with the subject site.

Historical information for adjoining properties has been cited throughout this Phase I ISA, as applicable and relevant, and are referenced in Section 7.0, of this Phase I ISA accordingly.

USES OF PROPERTIES IN SURROUNDING AREA
Per the ASTM E 1527-21 Standard Practice, uses in the area surrounding a property shall be identified in the Phase I ISA, but this task is only required to the extent that this information is revealed in the course of researching the property itself. If the environmental professional uses sources that include the surrounding area, surrounding uses should be identified to a distance determined at the discretion of the environmental professional. Factors to consider in making this determination include, but are not limited to:
• The extent to which information is reasonably ascertainable; • The time and cost involved in reviewing surrounding uses; • The extent to which information is useful, accurate, and complete in light of the purpose of the records review;
• The likelihood of the information being significant to RECs in connection with the property;

Page 796 of 2424 ends

Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-21 • The extent to which potential concerns are obvious;
• Known hydrogeologic/geologic conditions that may indicate a high probability of hazardous substances or petroleum products migration to the property; • How recently local development has taken place;
• Information obtained from interviews and other sources; and • Local good commercial and customary practice.

Surrounding land uses have been noted throughout the Phase I ISA, as applicable, and are referenced in Section 7.0 accordingly.

3.4.1.2 Limiting Conditions
Michael Baker did not encounter any conditions that limited the historical use review during the course of this Phase I ISA.

3.4.2 STANDARD HISTORICAL SOURCES

3.4.2.1 Historical Uses Summary
Table 3-3, Historical Uses Summary, summarizes Michael Baker’s review of historical sources for on-site, adjoining, and surrounding uses. Based upon the evaluation of the sources reviewed, the surrounding area appears to have consisted of the Santa Ana River and associated canals, a railroad, unimproved roadways, and vacant land uses since at least 1896. Since at least the late 1930s, orchards, associated rural residential, and vacant land uses are prominent in the area. A major highway (previously identified as Highway 18; current SR-91) was developed by 1938. By 1972, the SR-91 interchange directly south of the site was developed, and the vicinity has since been developed with urban uses (commercial and industrial uses) that are prominent in the area until today.

The subject site appears to have consisted of waterway trending east to west since 1902, with unpaved roadways, orchards, open space, and/or vacant land uses observed on-site by 1938. The on-site waterway was channeled as the Santa Ana Valley Canal by 1949. By 1972, the southern portion of the site along Yorba Linda Boulevard has been developed along with SR-91 interchange to the south; this built feature may consist of the existing Yorba Linda Boulevard bridge over Old Canal Road adjoining the site. By 1985, all on-site roadways, including Yorba Linda Boulevard, Savi Ranch Parkway, Mirage Street, and Old Canal Road, were developed and paved; all orchards previously on-site were removed and the general area appears to have been graded for future development. From at least 1989 until 1994, the Savi Ranch commercial structures associated with

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Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-22 permanent ROW acquisition areas were developed. Past uses of these commercial structures were similar to existing uses at the time of this Phase I ISA (restaurants, retail, and office uses).

Adjoining uses consist of transportation, agricultural (orchard), open space, rural residential, and/or vacant land uses since at least 1938. A structure was developed by 1972 to the southwest of the site, and all other adjoining uses were either graded or developed with commercial/ industrial and office uses (area where current North County Business Center is located).

Table 3-3
Historical Uses Summary
Year On-Site Uses Adjoining Uses Surrounding Uses Source 1896 Unmapped Unmapped
Santa Ana River is identified in
the general vicinity. A east-west
trending railroad and several
roadways are identified to the
north of the Santa Ana River.

Mountainous features are
identified to the northwest of the
site.

Topographic
Maps
1898 Unmapped Unmapped No changes noted. Topographic
Maps
1901 Unmapped Unmapped Several waterways flow
alongside the Santa Ana River.

Topographic
Maps
1902 The subject site encompasses a
waterway trending east to west.

An unpaved roadway is
identified to the east of the site.

The east-west trending railroad
is identified as “R.R.” Similar to
the north, mountainous features
are also identified to the south of
the site.

Topographic
Maps
1932 Unmapped Unmapped
Horseshoe Bend is identified to
the north of the site. The eastwest trending railroad is identified as “AT&SF”.

Topographic
Maps
1938
An unpaved roadway, situated
along the current Old Canal
Road, is identified alongside the
previously identified waterway
trending east-west. Several
other unpaved roadways/trails
are situated near the current
Savi Ranch Parkway and Yorba
Linda Boulevard have also been
identified. Orchards, open
space, and/or vacant land uses
are identified throughout the
site.

Orchard use is identified to the
north of Old Canal Road.

Transportation and open space
are identified to the north.

Remote residential/agricultural
structure and graded lands are
identified to the south of the site.

Mostly agricultural, associated
rural residential, and vacant
land uses are noted in the
vicinity. Open spaces are noted
to the alongside the Santa Ana
River. A freeway is noted south
of the site.

Aerial
Photographs
1941 Unmapped Unmapped
Areas south of the subject site
are unmapped. On the mapped
areas, no changes are noted.

Topographic
Maps
1942 No changes noted. No changes noted. Remote residential/agricultural use structures in the area. A
Topographic
Maps

Page 798 of 2424 ends

Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-23 Year On-Site Uses Adjoining Uses Surrounding Uses Source freeway identified as “18” is
noted to the south.
1946 No changes noted. No changes noted. No changes noted. Aerial Photographs
1949 On-site waterway is identified as
Santa Ana Valley Canal. No changes noted.

Santa Ana Canyon is noted to
the northwest of the site across
the Santa Ana River. Anaheim
Union Canal is noted to the
northeast of the site. Freeway to
the south previously identified
as “18” has been identified with
“18” and “91”. Diversion Dam is
noted to the east of the site.

Topographic
Maps
1950 No changes noted. No changes noted. No changes noted. Topographic Maps
1953 No changes noted. No changes noted. No changes noted. Aerial Photographs
1963
Areas where the current Savi
Ranch Parkway alignment is
has been graded.

Gaded areas to the south are
now identified as orchards. Area
to the southwest of where
current Savi Ranch Parkway
alignment is located are
developed with orchard use.

Increased agricultural/ orchard
uses are noted in the vicinity.

Aerial
Photographs
1964
A water well appear to the
immediately north of Savi
Ranch Parkway near the
landscaped areas of current
PetSmart (APN 352-112-04)
where ROW acquisition would
occur.

Adjoining uses to the north,
east, south, and west of the site
are all orchards.

Several water wells are noted in
the vicinity; freeway to the south
is labeled 91 with four-lane.

Topographic
Maps
1965 No relevant records available. No relevant records available. No relevant records available. City Directory
1966 No changes noted. No changes noted. No changes noted. Aerial Photographs
1972
The southern portion of the site
along Yorba Linda Boulevard
has been developed along with
the new SR-91 interchange to
the south. This area may consist
of the existing Yorba Linda
Boulevard over Old Canal
Road.

A structure is noted southwest
of Old Canal Road and Yorba
Linda Boulevard areas.

A large building is noted to the
north of the site; SR-91 freeway
interchange is developed to the
south.

Topographic
Maps
1973 No relevant records available. No relevant records available. No relevant records available. City Directory
1974 No changes noted. No changes noted.

Area southeast of the site
(where current Extra Space
Storage and a substation are
located) appear developed.

Topographic
Maps
1975 No changes noted. No changes noted. No changes noted. Aerial Photographs
1976 No changes noted. No changes noted. No relevant records available. City Directory

Page 799 of 2424 ends

Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-24 Year On-Site Uses Adjoining Uses Surrounding Uses Source 1977 No changes noted. No changes noted. No changes noted. Aerial Photographs
1981 Unmapped Unmapped
Areas south and southeast of
the subject site are unmapped.

On the mapped areas, no
changes are noted.

Topographic
Maps
1982 No changes noted. No changes noted.

Areas north and west of the
subject site are unmapped. On
the mapped areas, no changes
are noted.

Topographic
Maps, City
Directory
1985
On-site roadways, including
Yorba Linda Boulevard, Savi
Ranch Parkway, Mirage Street,
and Old Canal Road, appear
developed and paved. All
orchards previously on-site
have vanished and appear
graded for future development.

Adjoining uses north of Old
Canal Road is developed with
commercial/ industrial and office
uses (areas where current North
County Business Center is
located); all other adjoining
undeveloped sites have been
graded.

Commercial and/or industrial
and residential uses are noted
in the vicinity.

Aerial
Photographs
1987 No relevant records available. No relevant records available. No relevant records available. City Directory
1988 No changes noted.

Commercial/industrial and office
uses are identified to the east of
Old Canal Road.

Areas north and west of the
subject site are unmapped. On
the mapped areas, the
previously identified large
building to the north of the site is
no longer identified on the map;
residential development are
noted to the southeast.

Topographic
Maps
1989
A structure and associated
surface parking lot is identified
on the site where Taco Bell is
located.

No changes noted.

Additional commercial and/or
industrial as well as residential
uses are noted in the vicinity.

Aerial
Photographs
1992 Taco Bell is listed at 22300 Old
Canal Road.

Yorba Linda Infiniti is listed at
22722 Old Canal Road. No relevant records available. City Directory 1994
Commercial structures with
associated surface parking lots
are identified on the sites where
Sprouts, PetSmart, and Staples
are located.

The adjoining use south of the
site is developed with two
structures, possibly Chick-fil-A
restaurant and McDonalds
restaurant. Adjoining use to the
west where VCA Yorba
Regional Animal Hospital would
be located is developed with
one structure. Adjoining use to
the north where current Costco
Wholesale is located has been
developed with one structure.

Commercial/ industrial uses are
developed east of Old Canal
Road and Eastpark Drive
intersection.

No changes noted. Aerial
Photographs
1995 No changes noted.

Yoba Linda Volkswagen is also
listed on 22722 Old Canal
Road. Sierra Cybernetics Inc is
listed at 22667 Old Canal Road.

No relevant records available. City
Directory

Page 800 of 2424 ends

Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-25 Year On-Site Uses Adjoining Uses Surrounding Uses Source 1997 No changes noted.

Additional commercial/
industrial uses have been
developed to the north and east
of Old Canal Road.

Areas north and west of the
subject site are unmapped. On
the mapped areas, no changes
are noted.

Topographic
Maps
2000 No changes noted. Force, John U is listed at 22722 Old Canal Road. No relevant records available. City Directory 2002
Surface parking lot is developed
on ROW acquisition parcel with
APN 352-113-01.

Kaiser Permanente is
developed. Extended Stay
America is identified to the
south of the site. Area west of
Yorba Linda Boulevard (current
Aero Mobility, Valvoline Instant
Oil Change, 76 gas station,
carwash locations) appear to be
developed with commercial
uses similar to the current use.

The subject site vicinity are all
developed with urban uses.

Aerial
Photographs
2005
Taco Bell resumed to be listed
at 22300 Old Canal Road;
Borders Books & Music is listed
at 22401 Old Canal Road;
Staples is listed at 5511 Mirage
Street, and Banfield the Pet
Hospital, Medical Management
International, and PetSmart are
listed under 5521 Mirage Street.

John Force Race
Station/Racing Inc are listed at
22722 Old Canal Road.

Charmilles is listed at 22667 Old
Canal Road.

No relevant records available.

Aerial
Photographs,
City
Directory
2009 No changes noted. No changes noted. No changes noted. Aerial Photographs
2010 No changes noted.

Business at 22667 Old Canal
Road has updated entity title to
GF Agie Charmilles.

No relevant records available. City
Directory
2012 No changes noted. Costco gas station appears
developed No changes noted.

Aerial
Photographs,
Topographic
Maps
2014 Sprouts Farmers Market is
listed at 22401 Old Canal Road.

Business at 22667 Old Canal
Road has updated entity title to
Agie Charmilles LLC.

No relevant records available. City
Directory
2015 No changes noted. No changes noted. No changes noted. Topographic Maps
2016 No changes noted. No changes noted. No changes noted. Aerial Photographs
2017 No changes noted. No changes noted. No changes noted. City Directory
2018 No changes noted. No changes noted. No changes noted. Topographic Maps
2020
UPS Alliance Shipping Partner
is listed at 5511 Mirage Street
along with Staples; Sprint are
listed at 5521 Mirage Street.

Multi-family residential use
(Oakcrest Heights) to the
southeast of the site has been
developed. Force Family
Investment LLC, force John
Race Station Store, and John
Force, are listed at 22722 Old
Canal Road.

No relevant records available.

Aerial
Photographs,
City
Directory

Page 801 of 2424 ends

Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-26 Year On-Site Uses Adjoining Uses Surrounding Uses Source 2022 No changes noted. No changes noted. No changes noted. Topographic Maps
Notes:

Bold denotes an interval gap, as described in Section 3.4.1.1, Methodology, Intervals.

Other sources reviewed, but that which did not include information pertaining to the subject site included the following: Sanborn Maps.

Source: Refer to Section 7.0, References, and Appendix C, Documentation, for full citation and documentation of sources utilized in this table.

3.4.2.2 Zoning/Land Use Records
Zoning/land use records generally consist of records of the local government in which the subject site is located and indicate the use permitted by the local government in particular zones within its jurisdiction. The records may consist of maps and/or written records.

The subject site consists of roadways. As such, no Yorba Linda General Plan (General Plan) land use designation or zoning apply to the subject site. The Orange County Transportation Authority (OCTA) Master Plan of Arterial Highways (MPAH) designates Yorba Linda Boulevard as a Major arterial, Savi Ranch Parkway as a Primary arterial, and Old Canal Road as a Collector; Mirage Street is not identified in the MPAH.

Several properties are proposed for partial and permanent roadway ROW acquisition by the City; it is acknowledged that no ROW acquisition is proposed for Caltrans ROW acquisition. A summary of proposed areas of acquisition and their associated land use designation and zoning are summarized in Table 3-4, Proposed ROW Acquisition Areas Land Use Designations and Zoning.

Table 3-4
Proposed ROW Acquisition Areas Land Use Designations and Zoning Assessor’s
Parcel
Number
(APN)
Address
Area of ROW
Acquisition
(Partial or
Full)
Existing Use Land Use
Designation1 Zoning2
Proposed City ROW Acquisition
352-112-03
5511 Mirage
Street, Yorba
Linda

0.057-acre or
2,465 square
feet (partial)
Landscaping and/or paved
areas for commercial use
(one-story commercial
structure occupied by
Staples)
I-Manufacturing
Planned
Development –
Savi Ranch (PD17)
352-112-04
5521 Mirage
Street, Yorba
Linda

0.106-acre or
4,635 square
feet (partial)
Landscaping and/or paved
areas for commercial use
(one-story commercial
I-Manufacturing
Planned
Development –
Savi Ranch (PD17)

Page 802 of 2424 ends

Section 3.0 | Records Review
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 3-27 Assessor’s
Parcel
Number
(APN)
Address
Area of ROW
Acquisition
(Partial or
Full)
Existing Use Land Use
Designation1 Zoning2
structure occupied by
PetSmart)
352-113-01 NA

0.068-acre or
2,970 square
feet (partial)
Landscaping and/or paved
areas, as well as surface
parking lot serving the
adjoining commercial use
(Sprouts)
I-Manufacturing
Planned
Development –
Savi Ranch (PD17)
352-113-02
22401 Old
Canal Road,
Yorba Linda

0.150-acre or
6,540 square
feet (partial)
Landscaping and/or paved
areas for commercial use
(one-story commercial
structure occupied by
Sprouts)
I-Manufacturing
Planned
Development –
Savi Ranch (PD17)
352-117-01, -
02, and -03
22300 Old
Canal Road,
Yorba Linda

0.004-acre or
195 square feet
(partial)
Landscaping and/or paved
areas for commercial use
(one-story commercial
structure occupied by Taco
Bell)
I-Manufacturing
Planned
Development –
Savi Ranch (PD17)
Notes:

1. City of Yorba Linda, 2016 General Plan Land Use Map, 2016.

2. City of Yorba Linda, City of Yorba Linda, Official Zoning Map, February 12, 2019.

3.4.2.3 Other Historical Sources
Other historical sources include miscellaneous maps, newspaper archives, and records in the files and/or personal knowledge of the property owner and/or occupants. No other historical sources were reviewed.

Page 803 of 2424 ends

Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 4-1 SECTION 4.0

SITE RECONNAISSANCE
According to the ASTM E 1527-21 Standard Practice, the objective of the site reconnaissance is to obtain information indicating the likelihood of identifying RECs in connection with the subject site.

4.1 METHODOLOGY AND LIMITING

CONDITIONS

4.1.1 METHODOLOGY
Michael Baker performed a visual observation of readily accessible areas of the subject site and immediately adjoining properties on May 7, 2025. At this time, the subject site was visually inspected. Refer to Exhibit 7, On-Site Photographs, and Exhibit 8, Off-Site Photographs, for photograph documentation conducted during the site visit. The subject site was viewed from all public thoroughfares. If roads or paths with no apparent outlet are observed on the subject site, the use of the road or path was identified to determine whether it was likely to have been used as an avenue for disposal of hazardous substances or petroleum products.

4.1.2 LIMITING CONDITIONS
Michael Baker did not encounter limiting conditions during the May 7, 2025 site visit.

4.2 ON-SITE OBSERVATIONS

4.2.1 DESCRIPTION OF ON-SITE USES
Currently, the subject site consists of roadways (Yorba Linda Boulevard, Savi Ranch Parkway, Mirage Street, and Old Canal Road); areas of permanent ROW acquisition consist of vacant areas of ornamental landscaping associated with off-site commercial land uses (i.e., Staples, Sprouts, PetSmart, Taco Bell); refer to Table 1-1 and Exhibit 7.

Page 804 of 2424 ends

View looking northwest at the southeast corner of the Yorba Linda Boulevard and Savi Ranch Parkway intersection.

View looking west at the Yorba Linda Boulevard over Old Canal Road bridge structure.

View looking southeast at the southeast corner of Savi Ranch Parkway/Mirage Street intersection.

View looking west along Old Canal Road.

SAVI RANCH PARKWAY WIDENING/CONNECT SAVI RANCH PROJECT

PHASE I INITIAL SITE ASSESSMENT
Exhibit 7
On-Site Photographs 06/2025 • JN 204674 Page 805 of 2424 View looking south at a utility shed along Old Canal Road.

View looking northwest at the adjoining commercial uses located northeast of the Savi Ranch Parkway and Mirage Street intersection.

View looking northwest at the adjoining light industrial and commercial uses along Old Canal Road.

View looking southwest at the adjoining commercial uses along Yorba Linda Boulevard.

SAVI RANCH PARKWAY WIDENING/CONNECT SAVI RANCH PROJECT

PHASE I INITIAL SITE ASSESSMENT
Exhibit 8
Off-Site Photographs 06/2025 • JN 204674 Page 806 of 2424 Section 4.0 | Site Reconnaissance
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 4-4

4.2.2 DESCRIPTION OF ON-SITE STRUCTURES AND ROADS
As described above, the subject site consists of roadway ROW (Yorba Linda Boulevard, Savi Ranch Parkway, Mirage Street, and Old Canal Road) and ornamental landscaping associated with off-site commercial land uses (i.e., Staples, Sprouts, PetSmart, Taco Bell) land uses. A description of the existing roadways on-site is provided below:
• Savi Ranch Parkway: The subject site consists of Savi Ranch Parkway between Yorba Linda Boulevard and Mirage Street.
• Yorba Linda Boulevard: The subject site consists of Yorba Linda Boulevard between Savi Ranch Parkway and approximately 180 feet north of SR-91 off-ramp. • Mirage Street: The subject site consists of Mirage Street between East Crystal Drive and Old Canal Road.
• Old Canal Road: The subject site consists of Old Canal Road segment that begins approximately 180 feet west of Mirage Street and Old Canal Road intersection and terminates at Eastpark Drive and Old Canal Road intersection to the east.

As detailed in Table 1-1, proposed permanent ROW acquisition areas include the landscaped and/or paved areas associated with off-site commercial uses (APNs 352-112-03 [Staples, located at 5511 Mirage Street], 352-112-04 [PetSmart, located at 5521 Mirage Street], 352-113-02 [Sprouts, located at 22401 Old Canal Road], and 352-117-01, -02, and -03 [Taco Bell, located at 22300 Old Canal Road]) as well as landscaped and/or paved areas of surface parking lot use at APN 352- 113-01. A total of four one-story off-site commercial structures are located on these properties associated with ROW acquisition. No structures are located on-site.

4.2.3 DESCRIPTION OF PAST USES OF THE SUBJECT SITE
Based on a review of historical sources, past uses of the subject site consist of waterway, transportation, agricultural (orchard), and open space/recreation uses. Past uses of the areas of ROW acquisition are reported to consist of similar uses including waterway, transportation, agricultural (orchard), and open space/recreation uses, as well as commercial uses (restaurants, retail, and office uses) similar to today’s uses.

Page 807 of 2424 ends

Section 4.0 | Site Reconnaissance
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 4-5

4.2.4 HAZARDOUS SUBSTANCES AND PETROLEUM PRODUCTS
Michael Baker did not observe hazardous substances or petroleum products on-site during the May 7, 2025 site visit. However, based on a review of historical sources, off-site commercial uses associated with areas of permanent ROW acquisition (i.e., PetsSmart, Staples, and Sprouts) involve handling of small amounts of hazardous materials. No such activities were observed during the May 7, 2025 site visit.

4.2.5 CHEMICAL STORAGE TANKS (ASTS AND USTS)
During the May 7, 2025 site visit, the subject site was inspected for fill pipes, vent pipes, areas of abnormal or heavy staining, manways, manholes, access covers, concrete pads not homogenous with surrounding surfaces, concrete build-up areas potentially indicating pump islands, abandoned pumping equipment, or fuel pumps. No evidence of manholes or hazardous material storage that appeared to be associated with chemical storage tanks was noted.

4.2.6 SPILLS
No visual or physical evidence of stained catch basins, drip pads, sumps, or stained soils was observed during the May 7, 2025 site visit.

4.2.7 SOLID WASTE DISPOSAL
No indication of major solid waste disposal practices (i.e., landfills) was apparent during the May 7, 2025 site visit.

4.2.8 UTILITIES
Several utilities (underground sewer and water line; and storm drains) were noted within the boundaries of the subject site and permanent ROW acquisition area during the May 7, 2025 site visit. No overhead power lines or underground petroleum or natural gas pipe line markers were observed. No staining or leakage was noted with respect to on-site utilities.

4.2.8.1 Polychlorinated Biphenyls (PCBs)
No transformers were observed within the subject site during the May 7, 2025 site visit.

Page 808 of 2424 ends

Section 4.0 | Site Reconnaissance
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 4-6

4.2.8.2 Wells
No water wells were observed within the boundaries of the subject site during the May 7, 2025 site visit. No evidence of monitoring, oil, injection, or dry wells were observed on-site during the May 7, 2025 site visit.

4.2.8.3 Potable Water Supply
The surrounding area is served by the City’s local water system, based on water facilities that were observed during the May 7, 2025 site visit.

4.2.8.4 Sewage Disposal System
The surrounding area appears to be served by the City’s local sewer system, which was noted via sewer manhole covers noted in roadway ROW. No evidence of other sewage disposal systems (including septic systems) was noted during the May 7, 2025 site visit.

4.2.8.5 Heating/Cooling
Michael Baker did not observe any heating or cooling systems on-site during the May 7, 2025 site visit.

4.2.9 DRAINS AND SUMPS
Michael Baker did not observe drains or sumps during the site visit, as the subject site is associated with roadways and vacant areas associated with ROW acquisition consist of landscaping and/or paved areas for off-site commercial uses. Typical curb/gutter and catch basins associated with the City’s storm drain system were observed throughout the subject site.

4.2.10 PITS, PONDS, LAGOONS
No evidence of pits, ponds, or lagoons was observed during the May 7, 2025 site visit.

4.2.11 ASBESTOS-CONTAINING MATERIAL
Asbestos is a strong, incombustible, and corrosion resistant material, which was used in many commercial products since prior to the 1940s and up until the early 1970s. If inhaled, asbestos fibers can result in serious health problems. Asbestos containing materials (ACMs) are building materials containing more than one percent asbestos (some state and regional regulators impose a 0.1 percent threshold).

Page 809 of 2424 ends

Section 4.0 | Site Reconnaissance
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 4-7 The subject site and areas associated with ROW acquisition; no structures are located on-site.

Further, the project does not propose any modifications to the existing Yorba Linda Boulevard overpass, over Old Canal Road. Thus, there is no potential for ACMs to be found on-site from onsite structures.

4.2.12 LEAD-BASED PAINTS
Lead-Based Paints (LBPs) were commonly used in traffic striping materials before the discontinued use of lead chromate pigment in traffic striping/marking materials and hot-melt Thermoplastic stripe materials (discontinued in 1996 and 2004, respectively). Traffic striping was observed along roadway segments within or adjoining the subject site. Thus, LBPs may be present within traffic striping. Traffic striping along on-site roadways were noted to be in good condition during the May 7, 2025 site visit.

Until 1978, when the U.S. Consumer Product Safety Commission (CPSC) phased out the sale and distribution of residential paint containing lead, many homes were treated with paint containing some amount of lead. It is estimated that over 80 percent of all housing built prior to 1978 contains some LBP. The mere presence of lead in paint may not constitute a material to be considered hazardous. In fact, if in good condition (no flaking or pealing), most intact LBP is not considered to be a hazardous material. In poor condition LBPs can create a potential health hazard for building occupants, especially children. The subject site and areas associated with ROW acquisition do not include any structures proposed for modification and/or demolition. Thus, there exist no potential for LBPs to be found on-site from on-site structures.

4.2.13 TREATED WOOD WASTE
Treated wood waste comes from old wood that has been treated with chemical preservatives.

These chemicals help protect the wood from insect attack and fungal decay while it's being used.

Fence posts, sill plates, landscape timbers, pilings, guardrails, and decking, to name a few, are all examples of chemically treated wood. Treated wood waste contains hazardous chemicals that pose a risk to human health and the environment. Arsenic, chromium, copper, creosote, and pentachlorophenol are among the chemicals used to preserve wood and are known to be toxic or carcinogenic. Harmful exposure to these chemicals may result from touching, inhaling or ingesting treated wood waste particulate (e.g., sawdust and smoke).

No treated wood was observed within the boundaries of the subject site.

Page 810 of 2424 ends

Section 4.0 | Site Reconnaissance
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 4-8

4.3 OFF-SITE OBSERVATIONS
An adjoining property is considered any real property or properties that the border of which is contiguous or partially contiguous with that of the subject site, or that would be contiguous or partially contiguous with that of the subject site but for a street, road, or other public thoroughfare separating them. An adjacent property is any real property located off-site, which is not adjoining.

Visual observations of the publicly accessible portions of adjoining properties were conducted on May 7, 2025 as part of this Phase I ISA and are described below.

4.3.1 DESCRIPTION OF CURRENT AND

PAST USES OF THE SURROUNDING AREA
Currently, the subject site is surrounded by urban development including commercial, industrial, residential, open space/recreation, and transportation uses. Surrounding past off-site uses appeared to consist of agricultural (orchard), commercial, industrial, rural residential, and open space/recreation uses. Further north, open space/recreation uses along waterway (Santa Ana River) were noted. No additional off-site uses have been noted during the May 7, 2025 site visit.

4.3.2 DESCRIPTION OF CURRENT USES AND

STRUCTURES AT ADJOINING PROPERTIES
Current adjoining properties to the north consist of residential, vacant, and industrial land uses.

The following is a detailed description of each adjoining land use observed on May 7, 2025:
• North: Commercial (i.e., Costco Wholesale and Costco Gas Station) and open space/recreation uses along Santa Ana River are located to the north of the subject site; • East: Commercial (i.e., Kaiser Permanente) and business parks with light industrial, commercial, office, and institutional uses (i.e., Euroline Steel Windows & Doors, Arbon Equipment Corporation, Church of Grace, John Force racing, etc.) are located to the north of Old Canal Road (east of Mirage Street);
• South: Commercial (i.e., Taco Bell, McDonalds, Chick-fil-A, Denny’s, Maserati of Anaheim Hills, Ayres Suites Yorba Linda, and Extended Stay America) uses are located to the south; and
• West: Commercial (i.e., J Star Chrysler Dodge Jeep Ram of Anaheim Hills, Aero Mobility, Valvoline Instant Oil Change, 76 gas station, etc.) are located to the west.

Page 811 of 2424 ends

Section 4.0 | Site Reconnaissance
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 4-9 During a preliminary observation of adjoining properties from public thoroughfares, no visible or physical evidence was observed to suggest that a surface release of petroleum-based material has recently occurred. No unusual or suspicious materials handling or storage practices were observed with respect to adjacent properties during the May 7, 2025 site visit.

4.3.3 DESCRIPTION OF PAST USES AND

STRUCTURES AT ADJOINING PROPERTIES
Surrounding past off-site uses appeared to consist of agricultural (orchard), commercial, industrial, rural residential, and open space/recreation uses. No evidence to suggest other past uses were observed during the May 7, 2025 site visit.

4.3.4 OBSERVATIONS OF OFF-SITE PROPERTIES

4.3.4.1 Utilities
Typical utilities (e.g., power lines; pad-mounted transformers; underground sewer and water line; utility (AT&T) structure; and storm drains) were noted within adjoining and adjacent properties during the May 7, 2025 site visit. No staining or leaking was observed with respect to off-site utilities during the May 7, 2025 site visit.

4.3.4.2 Chemical Storage Tanks
Evidence of USTs, via fuel islands, were observed at the adjoining 76 gas station facility and Costco Gasoline facility. ASTs/55-gallon waste oil drums are anticipated to be present at the adjoining Valvoline Instant Oil Change. However, no was evidence of a release was observed during the May 7, 2025. No other unusual or suspicious materials handling or storage practices were observed with respect to off-site properties as observed from the subject site.

4.3.4.3 Hazardous Materials
Based on a review of historical sources, several adjoining and adjacent commercial/light industrial uses are anticipated to involve the handling of small amounts of hazardous materials.

No evidence of hazardous materials or a release was observed during the May 7, 2025 site visit.

No unusual or suspicious materials handling or storage practices were observed with respect to adjacent properties as observed from the subject site.

Page 812 of 2424 ends

Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 5-1 SECTION 5.0

INTERVIEWS
The ASTM E 1527-21 Standard Practice indicates that the objective of interviews is to obtain information indicating RECs in connection with the subject site. Interviews with past and present owners, operators, and occupants of the subject site consist of questions to be asked in the manner and of persons as described in the ASTM E 1527-21 Standard Practice. The content of questions to be asked shall attempt to obtain information about uses and conditions observed during the site reconnaissance as well as the documentation review. The content of questions to be asked of State and/or local government officials shall be decided in the discretion of the environmental professional(s) conducting the Phase I ISA, provided that the questions shall generally be directed towards identifying RECs in connection with the subject site.

5.1 PROPERTY OWNER
The subject site consists of roadways (owned by the City) and proposed ROW acquisition areas (owned by private entities). Refer to Section 2.0, User Provided Information, for information provided by the City at the time of this Phase I ISA. Due to the nature of the project (proposed roadway right-of-way improvements, the property owners associated with ROW acquisition areas were not available readily available for interview during the preparation of this Phase I ISA.

5.2 KEY SITE MANAGER/OPERATOR
A key site manager, identified by the property owner, is a person with good knowledge of the uses and physical characteristics of the property. Often the Key Site Manager is the property manager, the chief physical plant supervisor, or head maintenance person. If the user is the current property owner, the user has an obligation to identify a key site manager, even if it is the user himself or herself.

The Deputy Director Public Works/Assistant City Engineer, Mr. Rick Yee, P.E., was available for interview at the time of this Phase I ISA. Mr. Yee’s team provided information associated with ROW acquisition parcels (as shown on Table 1-1) via email correspondence on April 24, 2025 (refer to Appendix C). Mr. Yee also provided as-built plans for on-site roadways (refer to Section

5.4.1 below) on April 24, 2025 (refer to Appendix C). Further, on June 1, 2025, Mr. Yee confirmed that there are no known on-site water wells and/or oil/gas wells present.

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Section 5.0 | Interviews
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 5-2

5.3 OCCUPANTS
No residential uses are located on-site. Therefore, no occupants were interviewed during the course of this Phase I ISA.

5.4 LOCAL GOVERNMENT OFFICIALS

5.4.1 City of Yorba Linda Public Works Department
As the user of this Phase I ISA, the City of Yorba Linda provided Michael Baker with information, referenced throughout this Phase I ISA, accordingly. Specifically, the Deputy Director Public Works/Assistant City Engineer, Mr. Rick Yee, P.E., coordinated with the City of Yorba Linda Public Works Department to request available information regarding roadway striping for roadway segments within or adjoining the subject site; refer to Appendix C for such correspondence. On behalf of the City of Yorba Linda Public Works Department, Mr. Rick Yee provided as-built plans for on-site roadways. In follow up correspondence from the City of Yorba Linda, received, July 8, 2025, staff confirmed that on-site roadways were last restriped in March 2023.

5.4.2 Anaheim Fire & Rescue (Anaheim Fire)
Michael Baker contacted staff on May 15, 2025 to inquire about available files for identified regulatory sites; refer to Appendix C for such correspondence. An email response was received on May 27, 2025, stating that the agency needs an additional fourteen days to respond; refer to Appendix B. No other responses have been received at this time. • Orange County Health Care Agency (HCA) Environmental Health Division (DEH):

Michael Baker requested files on May 6, 2025 via the “Request for Public Records” online portal. From May 6, 2025 to May 8, 2025, staff requested further clarifications regarding the requested addressed. On May 16, 2025, staff notified Michael Baker that the agency needs an extension of time to prepare its initial response, and such response will be provided on or before May 30, 2025. An email response was received on May 28, 2025, providing links to digital records available; refer to Appendix B. Michael Baker reviewed available records obtained online.
• Santa Ana Regional Water Quality Control Board (Santa Ana RWQCB): Michael Baker requested files on May 6, 2025. An email response was received on May 6, 2025, stating that records for most facilities could be found online through various databases; refer to Appendix B. Michael Baker requested additional files on May 15, 2025, and an email

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Section 5.0 | Interviews
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 5-3 response was received on May 20, 2025. Michael Baker reviewed available Santa Ana RWQCB records obtained online.

5.4.3 Department of Toxic Substances Control (DTSC)
Michael Baker contacted staff on May 6, 2025 to inquire about available files for identified regulatory sites; refer to Appendix C for such correspondence. An email response was received on May 6, 2025, stating that no records pertaining to the sites/facilities referenced were found.

5.4.4 Orange County Health Care Agency (HCA) Environmental Health Division (DEH)
Michael Baker contacted staff on May 6, 2025 to inquire about available files for identified regulatory sites; refer to Appendix C for such correspondence. From May 6, 2025 to May 8, 2025, staff requested further clarifications regarding the requested addressed. On May 16, 2025, staff notified Michael Baker that the agency needs an extension of time to prepare its initial response, and such response will be provided on or before May 30, 2025. No other response has been received at this time.

5.4.5 Santa Ana Regional Water Quality Control Board (Santa Ana RWQCB)
Michael Baker contacted staff on May 6, 2025 and May 15, 2025 to inquire about available files for identified regulatory sites; refer to Appendix C for such correspondence. An email response was received on May 6, 2025 and May 20, 2025, stating that, for those properties that have records, the requested records are available online.

5.5 OTHER PERSONS
No other persons were interviewed during the course of this Phase I ISA.

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-1 SECTION 6.0

EVALUATION
Michael Baker has performed a Phase I ISA in general conformance with the scope of services and limitations of ASTM E 1527-21 Standard Practice of the Savi Ranch Parkway Widening/Connect Savi Ranch Project site, also known as the subject site within this Phase I ISA.

Any exceptions to, or deletions from, this practice are described in the Section 6.4, Limiting Conditions/Deviations, of this report. This Phase I ISA has revealed the following in connection with the subject site.

6.1 FINDINGS AND OPINIONS
The following findings and opinions are based upon review of reasonable ascertainable referenced material available to Michael Baker during the preparation of this Phase I ISA, which included a review of historical aerial photographs, historical topographic maps, regulatory databases, and other documentation, as well as interviews and site reconnaissance.

6.1.1 CURRENT ON-SITE USES
Currently, the subject site consists of roadways (Yorba Linda Boulevard, Savi Ranch Parkway, Mirage Street, and Old Canal Road); areas of permanent ROW acquisition consist of commercial (Staples, Sprouts, PetSmart, Taco Bell) and vacant land uses; refer to Table 1-1 and Exhibit 7.

6.1.1.1 Existing Roadway Uses
Polychlorinated Biphenyls (PCBs). PCBs could be associated with transformers. No transformers are observed within project boundary during the May 7, 2025 site visit. As no transformers are located on-site, it is Michael Baker’s opinion that no REC has resulted in this regard.

Lead-Based Paints (LBPs) Associated With Traffic Striping Materials. LBPs were commonly used in traffic striping materials before the discontinued use of lead chromate pigment in traffic striping/marking materials and hot-melt Thermoplastic stripe materials (discontinued in 1997 and 2006, respectively). Michael Baker observed traffic striping along on-site roadways during the May 7, 2025 site visit. Traffic striping materials appear to be in fair condition and relatively

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-2 recently resurfaced/stripped (March 2023), and there was no evidence to suggest a release. Thus, it is Michael Baker’s opinion that no REC has resulted.

As the project proposes disturbance of on-site traffic striping materials, demolition of these materials presents a potential hazardous waste impact. The contractor would be required to determine the specific traffic striping/pavement marking material proposed for removal (whether it is yellow thermoplastic, yellow pavement markings, and/or non-yellow pavement markings) prior to disturbance. Disposal of traffic striping materials at an appropriate, permitted disposal facility should be conducted as determined by a lead specialist; a recommendation has been included accordingly.

6.1.2 PAST ON-SITE USES
Based on a review of historical sources, past uses of the subject site and areas of ROW acquisition consist of agricultural land uses. Upon removal and grading of agricultural uses, the site was developed into commercial uses similar to existing conditions at this time of this Phase I ISA.

Based on the past on-site uses, the following findings with respect to the subject site are noted:

6.1.2.1 Past Agricultural Uses
Based upon evaluation of the documented land use as demonstrated in the reviewed resources, the series of historical aerial photographs and maps, and the site inspection, majority of the adjoining uses appears to have been historically utilized for agricultural purposes (from prior to 1938 through the 1970’s, possibly up to 1985), by 1985, the subject site and surrounding properties were graded. Based on the year of former agricultural activities, a combination of several commonly used pesticides (i.e., DDD, DDT, DDE), which are now banned, may have been used throughout the property. The historical use of agricultural pesticides may have resulted in pesticide residues of certain persistence in soil at concentrations that are considered to be hazardous based on established federal regulatory levels. The primary concern with historical pesticide residues is human health risk from inadvertent ingestion of contaminated soil, particularly by children. The presence of moderately elevated pesticide residuals in soil presents potential health and marketplace concerns.

Given the years of past agricultural use (1940s through the 1960s), pesticide residues of certain persistence in soil could be of concern in on-site soils. However, this property was heavily graded in the 1980s and then developed with the existing on-site commercial uses and roadways. As such, it is unlikely that elevated concentrations of pesticide residues in soil from past agricultural use remain. Further, there is no evidence that these former agricultural uses did not use good

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-3 customary practices. As such, it is the opinion of Michael Baker that residual pesticides are a de minimis condition, if any, and no REC has resulted in this regard.

6.1.2.2 Past Roadway Uses
Aerially Deposited Lead (ADL). ADL refers to lead deposited on highway shoulders from past leaded fuel vehicle emissions. According to the Caltrans ADL webpage (Caltrans 2014), although leaded fuel has been prohibited in California since the 1980’s, ADL may still be present in soils adjacent to highways in use prior to that time.

The project site has encompassed the on-site roadways since the 1980s, other than Yorba Linda Boulevard, which has been present as early as 1938, if not older. However, these roadways do not appear to have been heavily traveled until after the 1980s. Therefore, the potential for elevated levels of aerially deposited lead contamination from vehicle exhaust to exist within soils along on-site roadways is unlikely. It is the opinion of Michael Baker that ADL is a de minimis condition and has not resulted in a REC on the subject site.

6.1.3 CURRENT ADJOINING PROPERTIES
Based on available information reviewed as part of this Phase I ISA, current adjoining properties are known to handle/store/maintain hazardous substances and/or petroleum products. These uses include the following:

6.1.3.1 Current Adjoining Properties Associated with ROW Acquisition Areas Staples at APN 352-112-03 (5511 Mirage Street)
Proposed partial ROW acquisition of parcel with APN 316-160-002 includes the acquisition of landscaping and/or paved areas for commercial use (Staples) on the site.

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-4 PetSmart at APN 352-112-04 (5521 Mirage Street)
Proposed partial ROW acquisition of parcel with APN 352-112-04 includes the acquisition of landscaping and/or paved areas for commercial use (PetSmart) on the site.

Based on EDR, the current occupant, PetSmart, is reported for the storage, bulking, and/or transfer of typical retail waste (waste from returned and/or broken retail items) off-site without treatment/recovery. Hazardous waste containers were stored closed and properly labeled. No indications of illegal disposal were observed. Based on available records, no releases to soil, soil gas, or groundwater from this existing commercial use were recorded. As no evidence of a release was noted, it is the opinion of Michael Baker that no REC has resulted from the current commercial use on this site.

Surface Parking Lot at APN 352-113-01 (No Address)
Proposed partial ROW acquisition of parcel with APN 352-113-01 includes the acquisition of landscaping and/or paved areas, as well as existing surface parking lot serving the adjoining commercial use (Sprouts).

Based on a review of historical documentation, this surface parking lot were developed by 2002.

Based on the information reviewed as part of this Phase I ISA, there are no indications that this surface parking lot use handled/stored/transported hazardous materials in reportable quantities. It is the opinion of Michael Baker that this land use has not resulted in a REC at the time of this Phase I ISA.

Sprouts at APN 352-113-02 (22401 Old Canal Road)
Proposed partial ROW acquisition of parcel with APN 352-113-02 includes the acquisition of landscaping and/or paved areas for commercial use (Sprouts) on the site.

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-5 Taco Bell at APNs 352-117-01, -02, and -03 (22300 Old Canal Road) Proposed partial ROW acquisition of parcel with APNs 352-117-01, -02, and -03 includes the acquisition of landscaping and/or paved areas for off-site commercial use (Taco Bell).

6.1.3.2 Other Current Adjoining Commercial Uses
Costco Wholesale #445 (Gas Station) (5500 Mirage Street) This facility adjoins the site to the northeast (east of Mirage Street near the northern terminus of the subject site). This facility is identified as the Costco gasoline service station in use since 2014.

Four double-walled underground storage tanks (USTs) were reported to be installed at this site in 2014. Based on UST FINDER, these USTs contain regular and premium unleaded petroleum as well as other types of petroleum. This site was also reported to store a 55-gallon drum of waste gasoline and a 55-gallon drum of waste gasoline debris in October 2024. In 2019, this facility was reported on CERS for failure to keep water out of the secondary containment of UST systems as the turbine sump was observed with approximately half gallon of fuel; this site has returned to compliance on October 30, 2019. In 2023, this facility was reported on CERS due to the spill bucket, for the fuel additive, failed initial testing; this site has returned to compliance on October 12, 2023.

Several other administrative violations were reported, mostly related to hazardous materials documentation. No release, other than minor releases to secondary containment that were brought to compliance, were reported.

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-6 Costco Wholesale #445 (22633 Savi Ranch Parkway)
This facility adjoins the site to the northeast (east of Mirage Street near the northern terminus of the subject site). This facility is identified as General Merchandise Stores. This facility was reported as a small quantity generator handling non-RCRA hazardous liquid (water-based products), potentially waste from consumer product returns, as well as metal sludge, possibly from handling lead acid batteries. This property is also reported for the storage, bulking, and/or transfer of off-specification, aged or surplus organics off site. Several administrative violations were reported, related to hazardous materials documentation. No releases were reported.

Relationship to the Subject Site
Based on the information reviewed as part of this Phase I ISA, this off-site property has not resulted in a release of hazardous materials to the soil, soil gas, and/or groundwater. As such, it is the opinion of Michael Baker that no REC has resulted in this regard.

Aero Mobility Inc / Weir Canyon Chevrolet (1001 North Weir Canyon Boulevard) This facility adjoins the subject site to the west across Yorba Linda Boulevard. This site has been an automobile dealership with related service bays since at least 2005. Based on EDR, this facility was a Chevrolet dealership from 2005 to 2009; Aero Mobility Inc. (also an automobile dealership) is the current occupant and has reported as a handler, not a generator, of non-RCRA hazardous waste solid (oily solid waste/used metal oil filters) since 2019. Automobile services usually involve the storage and handling of hazardous materials related to automotive maintenance activities.

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-7 Valvoline Instant Oil Change Gn0043 (985 N Weir Canyon Boulevard) This facility adjoins the subject site to the west across Yorba Linda Boulevard. This facility provides oil change services which typically involve handling of hazardous materials. A 1,987- gallon AST containing unknown materials was reported. Additionally, a 55-gallon non RCRA hazardous waste liquid was also reported. No releases were reported at this property.

Relationship to the Subject Site
Based on the May 7, 2025 site visit and information revised as part of this Phase I ISA, it is the opinion of Michael Baker that an AST at this facility would likely be located at least approximately 172 feet up- and cross-gradient from the subject property. Based on available records, there is no evidence to suggest a past release to soil, soil gas, or groundwater has occurred at this property.

Thus, it is the opinion of Michael Baker that no REC has resulted.

Savi Ranch Circle K 76 (945 North Weir Canyon Boulevard) This facility adjoins the subject site to the southwest across Yorba Linda Boulevard. Three USTs were reported at this property. Based on files reviewed, USTs included one 20,000-gallon UST containing regular unleaded petroleum, one 8,000-gallon UST containing diesel fuel; and one 12,000-gallon UST containing premium unleaded. This facility has been listed as a service station from 2003 through 2014. Although several violations have been reported involving failure of the leak detection equipment, no releases have been reported at this property.

Relationship to the Subject Site
Based on the May 7, 2025 site visit and information revised as part of this Phase I ISA, the USTs at this facility are anticipated to be located approximately 190 feet southwest . This site is considered up-gradient from the site.

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-8 John Force Racing Inc (22722 Old Canal Road)
This facility adjoins the subject site to the southeast (south of Old Canal Road and east of Eastpark Drive, near the eastern terminus of the subject site). This facility was reported as a Small Quantity Generator and handler of tetrachloroethylene (liquid), unspecified organic liquid mixture, unspecified solvent mixture, liquids with halogenated organic compounds, and oil/water separation sludge. No releases were reported at this property.

Kaiser Foundation Hospital-Yorba Linda Medical Offices (22550 Savi Ranch Parkway) This facility adjoins the subject site to the east (south of Mirage Street and north of Old Canal Road). This facility provides medical services and is listed in RCRA Listings as a large quantity generator. Variations of medical-related chemicals/waste were reported at this site. No releases were reported.

6.1.3.2 Existing Bridge Structure
It is acknowledged that one bridge structure (Yorba Linda Boulevard over Old Canal Road) is present adjoining the Yorba Linda Boulevard portion of the site. No modifications to the existing bridge structure are proposed. As such, it is the opinion of Michael Baker that no REC has resulted, and the project is not anticipated to involve bridge-structure related asbestos-containing materials (ACMs) and/or lead-based paints (LBPs).

6.1.4 PAST ADJOINING USES
Based upon the evaluation of the documented land use as demonstrated in the resources reviewed as part of this Phase I ISA, past adjoining uses appear to have been associated with

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-9 agricultural land uses since at least 1938. By 1985, the area was graded for development of the existing commercial/industrial and office uses. The following findings are made in relation to such adjoining past uses:

6.1.4.1 Past Adjoining Agricultural Uses
Based upon evaluation of the documented land use as demonstrated in the reviewed resources, the series of historical aerial photographs and maps, and the site inspection, majority of the adjoining uses appears to have been historically utilized for agricultural purposes (from at least 1938 through mid-1980’s). Therefore, a combination of several commonly used pesticides (i.e., DDD, DDT, DDE), which are now banned, may have been used throughout the subject site. The historical use of agricultural pesticides may have resulted in pesticide residues of certain persistence in soil at concentrations that are considered to be hazardous based on established federal regulatory levels. The primary concern with historical pesticide residues is human health risk from inadvertent ingestion of contaminated soil, particularly by children. The presence of moderately elevated pesticide residuals in soil presents potential health and marketplace concerns. Furthermore, a water well is located to the north of the site, possibly associated with past agricultural use.

Given the length of past agricultural use adjoining and surrounding the subject site, pesticide residues of certain persistence in soil could be of concern. However, from 1980s onward, the subject site and its surrounding area were heavily graded and then developed with commercial, industrial, and residential development. As such, it is unlikely that elevated concentrations of pesticide residues in soil from past adjoining agricultural use impacted on-site soils. Further, there is no evidence that these former agricultural uses did not use good customary practices. As such, it is the opinion of Michael Baker that no REC has resulted in this regard.

Multiple adjoining structure area noted surrounding the subject property during this time period.

Such structures appear to be associated with agricultural uses and/or consist of ancillary residences. In addition, one large operation is noted to the north of the subject site, but south of the river. Based on the EDR database search, no evidence of a release of hazardous materials from these past adjoining activities have been noted. It is the opinion of Michael Baker that no REC has resulted in association with these past adjoining structures.

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-10

6.1.4.2 Past Adjoining Uses Associated with ROW Acquisition Past Commercial Use (UPS Alliance Shipping Partner) at APN 352-112-03 (5511 Mirage Street)
Based on the information reviewed as part of this Phase I ISA, UPS Alliance Shipping Partner was listed at this property, along with Staples, as of 2020. Based on historical information reviewed, no other former land uses other than those discussed in this Phase I ISA were noted. Based on available regulatory listings, no past releases to soil, soil gas, or groundwater from this past commercial use were recorded. As such, it is the opinion of Michael Baker that no REC has resulted.

Past Commercial Use (Pet Hospital) at APN 352-112-04 (5521 Mirage Street) Based on a review of historical documentation, commercial structure and associated surface parking lot at this site were developed by 1994. Based on historical documentation, Banfield the Pet Hospital, Medical Management International, and PetSmart (current use) were listed under 5521 Mirage Street since 2005. Medical Management International Inc Dba Banfield Pet Hospital #0098 was reported at this address from 2018 through 2021; this facility was reported for the storage, bulking and/or transfer of waste medicine off site. Based on available records, no past releases to soil, soil gas, or groundwater from past uses of this site (i.e., Banfield the Pet Hospital and Medical Management International) were recorded. Based on the information reviewed as part of this Phase I ISA, no other historical land uses other than those commercial use discussed were located on this site since its development. As such, it is the opinion of Michael Baker that no REC has resulted from this past commercial use.

Past Commercial Use (Border Books & Music) at APN 352-113-02 (22401 Old Canal Road)
Based on a review of historical documentation, Borders Books & Music was listed as an occupant of the site in 2005. Based on EDR, no other historical land uses different from commercial use were located on this site since its development. Based on available records, no past releases to soil, soil gas, or groundwater from past use of this site were recorded. As such, it is the opinion of Michael Baker that no REC has resulted from past use(s) on this site.

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-11

6.1.4.3 Other Past Adjoining Commercial Uses
Charmilles Technologies (22667 Old Canal Road)
This facility adjoins the subject site to the north (along Old Canal Road, near the eastern terminus of the subject site). This facility is listed on an EDR-maintained database as a former drycleaner.

EDR reported this use as active from 2002 until 2012. No violations or releases were reported in the EDR database search.

Relationship to the Subject Site
This property is located approximately 1,710 feet east of the proposed areas of drill pile locations (proposed for the installation of retaining walls).

As a dry cleaner, this facility has a high likelihood to result in a release. However, proposed areas in proximity to this location only involve resurfacing activities and are not anticipated to result in any excavations of significance. Further, proposed areas of excavation and deeper drilling activities for proposed retaining wall piles are located approximately 1,710 feet to the east (cross and down gradient). As such, it is the opinion of Michael Baker that this dry cleaner facility has potentially resulted in a release at the subject site. However, based on the proposed activities, roadway resurfacing and retaining wall excavations and drilling pile activities, it is the opinion of Michael Baker that this release is likely a de minimis condition and no REC has resulted.

6.1.5 CURRENT AND PAST ADJACENT USES

6.1.5.1 Adjacent Oil Fields/Oil Wells
Based on a review of documentation, it is acknowledged that multiple oil fields are present to the west of the subject site (e.g., Richfield, Yorba Linda [ABD], as well as the smaller fields Esperanza, Kraemer Northeast [ABD] and Kramer [ABD]. The nearest fields (Kramer and Kramer Northeast) are abandoned and situated greater than 0.5-mile from the subject site. One idle oil well is noted approximately 1,820 feet north of the subject site across the Santa Ana River. Based on the direction of groundwater flow, the distance to the subject site (1,820 feet north of the subject site), and the status of the well, it is the opinion of Michael Baker that no REC has resulted.

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-12

6.1.6 ROW Acquisition Summary
Table 6-1
Proposed ROW Acquisition Areas Findings and Opinions
APN/Address/Area of
ROW Acquisition Finding and Opinion Conclusion
352-112-03
5511 Mirage Street, Yorba
Linda

No REC
(de minimis)
352-112-04
5521 Mirage Street, Yorba
Linda

0.106-acre (partial)
Existing Commercial Use (PetSmart) at APN 352-112-04 (5521 Mirage Street).

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-13 containers were stored closed and properly labeled. No indications of illegal disposal were observed. In addition to the PetsMart operation, Medical Management International Inc Dba Banfield Pet Hospital #0098 was reported at this address from 2018 through 2021; this facility was reported for the storage, bulking and/or transfer of waste medicine off-site. Based on available records, no releases to soil, soil gas, or groundwater from this existing commercial use were recorded. As no evidence of a release was noted, it is the opinion of Michael Baker that no REC has resulted from the current commercial use on this site.

Past Commercial Use (Pet Hospital) at APN 352-112-04 (5521 Mirage Street).

Based on a review of historical documentation, commercial structure and associated surface parking lot at this site were developed by 1994. Based on historical documentation, Banfield the Pet Hospital, Medical Management International, and PetSmart (current use) were listed under 5521 Mirage Street since 2005. Medical Management International Inc Dba Banfield Pet Hospital #0098 was reported at this address from 2018 through 2021; this facility was reported for the storage, bulking and/or transfer of waste medicine off site. Based on available records, no past releases to soil, soil gas, or groundwater from past uses of this site (i.e., Banfield the Pet Hospital and Medical Management International) were recorded. Based on the information reviewed as part of this Phase I ISA, no other historical land uses other than those commercial use discussed were located on this site since its development. As such, it is the opinion of Michael Baker that no REC has resulted from this past commercial use.

No REC
(de minimis)
352-113-01
No Address

No REC

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-14 Past Agricultural Use. Based upon evaluation of the documented land use as demonstrated in the reviewed resources, the series of historical aerial photographs and maps, and the site inspection, majority of the adjoining uses appears to have been historically utilized for agricultural purposes (from at least 1963 through the 1970’s, possibly up to 1985), by 1985, this property, and surrounding properties were graded.

Further, there is no evidence that these former agricultural uses did not use good customary practices. As such, it is the opinion of Michael Baker that residual pesticides are a de minis condition, if any, and no REC has resulted in this regard.

No REC
(de minimis)
352-113-02
22401 Old Canal Road, Yorba
Linda

0.150-acre (partial)
Existing Commercial Use (Sprouts) at APN 352-113-02 (22401 Old Canal Road).

Proposed partial ROW acquisition of parcel with APN 352-113-02 includes the acquisition of landscaping and/or paved areas for commercial use (Sprouts) on the site.

As no evidence of a release was noted, it is the opinion of Michael Baker that no REC has resulted from the current commercial use on this site.

No REC
Past Adjoining Agricultural Uses. Based upon evaluation of the documented land use as demonstrated in the reviewed resources, the series of historical aerial photographs and maps, and the site inspection, majority of the adjoining uses appears to have been historically utilized for agricultural purposes (from at least 1938 through mid-1980’s).

Given the length of past agricultural use adjoining and surrounding the subject site, pesticide residues of certain persistence in soil could be of concern.

However, from 1980s onward, the subject site and its surrounding area were highly disturbed with commercial, transportation, and industrial development.

Specifically, the roadways were substantially widened/improved since 1980s. As such, it is unlikely that elevated concentrations of pesticide residues in soil from past adjoining agricultural use impacted on-site soils. Additionally, there is no evidence that these agricultural use areas were not operated in accordance with good customary practices. As such, it is the opinion of Michael Baker that no REC has resulted in this regard.

No REC
(de minimis)

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-15 352-117-01
352-117-02
352-117-03
22300 Old Canal Road, Yorba
Linda

0.004-acre (partial)
Taco Bell at APNs 352-117-01, -02, and -03 (22300 Old Canal Road). Proposed partial ROW acquisition of parcel with APNs 352-117-01, -02, and -03 includes the acquisition of landscaping and/or paved areas for off-site commercial use (Taco Bell).

Based on the information reviewed as part of this Phase I ISA, there are no indications that this commercial restaurant use handled/stored/ transported hazardous materials in reportable quantities. It is the opinion of Michael Baker that this commercial use has not resulted in a REC at the time of this Phase I ISA.

No REC

6.1.7 DATA GAPS
A data gap is a lack of or inability to obtain information required by the ASTM E 1527-21 Standard Practice despite good faith efforts by the Environmental Professional to gather such information.

Data gaps may result from incompleteness in any of the activities required by this practice, including but not limited to site reconnaissance (for example, an inability to conduct the site visit) and interviews (for example, an inability to interview the key site manager, regulatory officials, etc.). A data gap by itself is not inherently significant. For example, if a property’s historical use in not identified back to 1940 because of data failure, but the earliest source shows that the property was undeveloped, this data gap by itself would not be significant. A data gap is only significant if other information and/or professional experience raises reasonable concerns involving the data gap. For example, if a building on the property is inaccessible during the site visit, and the Environmental Professional’s experience indicates that such a building often involves activity that leads to a REC, the inability to inspect the building would be a significant data gap warranting comment.

It is the opinion of Michael Baker that identified limiting conditions/deviations encountered as part of the Phase I ISA are not considered significant data gaps at the time of this Phase I ISA and no REC has resulted in this regard.

6.2 CONCLUSIONS
Michael Baker has performed a Phase I ISA in conformance with the scope and limitations of ASTM E 1527-21 Standard Practice of the Savi Ranch Parkway Widening/Connect Savi Ranch Project site, City of Yorba Linda, California, the subject site. Any exceptions to, or deletions from,

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Section 6.0 | Evaluation
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 6-16 this practice are described in Section 6.4, Limiting Conditions/Deviations, of this Phase I ISA. This Phase I ISA has revealed no evidence of RECs in connection with the subject site.

6.3 RECOMMENDATIONS
The following recommendations are based on the findings, opinions of the Environmental Professional (Michael Baker International), and conclusions made during the course of this Phase I ISA.

No recommendations are provided herein as no areas have been identified as RECs or hazardous waste impacts.

6.4 LIMITING CONDITIONS/DEVIATIONS
Michael Baker was unable to identify, within a five-year interval, the year (between 1966 and 1972) that the southern portion of the site along Yorba Linda Boulevard has been developed.

Some files were not reviewed for reported adjoining regulatory properties, as the Anaheim Fire & Rescue (Anaheim Fire) has requested an extension on May 27, 2025 and has not responded to Michael Baker’s file review request (initiated on May 15, 2025) at the time of this Phase I ISA.

However, based on the available historical documentation reviewed as part of this Phase I ISA, it is the opinion of Michael Baker that these files would not have increased the knowledge of the Environmental Professional such that the conclusions of this Phase I ISA would change. Thus, it is the opinion of Michael Baker that this deviation is not a significant data gap.

Further, no additional scope items, or items outside of the scope of a Phase I ISA E 1527-21 Standard Practice, were conducted as part of this Phase I ISA.

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 7-1 SECTION 7.0

REFERENCES
ASTM International, Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process, Designation: E 1527 – 21
ASTM International, Screening for Vapor Encroachment onto Properties Involved in Real Estate Transactions Course, November 14, 2013.

California Department of Conservation, Well Finder,
https://www.conservation.ca.gov/calgem/Pages/WellFinder.aspx, accessed on May 12, 2025.

City of Yorba Linda, 2016 General Plan Land Use Map, 2016.

City of Yorba Linda, City of Yorba Linda, Official Zoning Map, February 12, 2019.

Environmental Data Resources, Inc., Certified Sanborn Map Report, dated April 30, 2025.

Environmental Data Resources, Inc., EDR Historical Topo Map Report With QuadMatchTM, dated April 30, 2025.

Environmental Data Resources, Inc., The EDR-City Directory Image Report, dated May 2, 2025.

Environmental Data Resources, Inc., The EDR Aerial Photo Decade Package, dated April 30, 2025.

Environmental Data Resources, Inc., The EDR Radius MapTM with GeoCheck®, dated April 30, 2025.

Federal Emergency Management Agency, National Flood Hazard Layer FIRMette, https://msc.fema.gov/portal/home, accessed May 12, 2025.

Interview, Mr. Rick Yee, P.E., City of Yorba Linda Deputy Director Public Works/Assistant City Engineer, April 24, 2025 and May 20, 2025, follow up on July 8, 2025.

Michael Baker International, Water Quality Technical Memorandum, Savi Ranch Parkway Widening/Connect Savi Ranch Project, May 2025.

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Section 7.0 | References
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | 7-2 Site Visit, conducted on May 7, 2025.

U.S. Department of Agriculture, Web Soil Survey,
https://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx, accessed May 12, 2025.

U.S. Department of Transportation, National Pipeline Mapping System, https://www.npms.phmsa.dot.gov/, accessed May 12, 2025.

U.S. Environmental Protection Agency, EPA Map of Radon Zones, 1993.

United States Geological Survey, Black Star Canyon quadrangle (Map), 2022.

United States Geological Survey, Prado Dam quadrangle (Map), 2022.

United States Geological Survey, Orange quadrangle (Map), 2022.

United States Geological Survey, Yorba Linda quadrangle (Map), 2022.

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APPENDICES

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APPENDIX A:

ASTM TERMINOLOGY

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Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | A-1

ASTM TERMINOLOGY
The following definitions and descriptions of terms are from the ASTM E1527-21 Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process. abandoned property – property that can be presumed to be deserted, or an intent to relinquish possession or control can be inferred from the general disrepair or lack of activity thereon such that a reasonable person could believe that there was an intent on the part of the current owner to surrender rights to the property.
activity and use limitations – legal or physical restrictions or limitations on the use of, or access to, a site or facility: (1) to reduce or eliminate potential exposure to hazardous substances or petroleum products in the soil, soil vapor, groundwater, and/or surface water on the property, or (2) to prevent activities that could interfere with the effectiveness of a response action, in order to ensure maintenance of a condition of no significant risk to public health or the environment. These legal or physical restrictions, which may include institutional and/or engineering controls, are intended to prevent adverse impacts to individuals or populations that may be exposed to hazardous substances and petroleum products in the soil, soil vapor, groundwater, and/or surface water on a property. actual knowledge – knowledge actually possessed by an individual who is a real person, rather than an entity. Actual knowledge is to be distinguished from constructive knowledge that is knowledge imputed to an individual or entity.
adjoining properties – any real property or properties the border of which is contiguous or partially contiguous with that of the subject property, or that would be contiguous or partially contiguous with that of the subject property but for a street, road, or other public thoroughfare separating them.
aerial photographs – photographs taken from an aerial platform with sufficient resolution to allow identification of development and activities.
all appropriate inquiry – that inquiry constituting all appropriate inquiries into the previous ownership and uses of the subject property consistent with good commercial and customary practice as defined in CERCLA, 42 U.S.C. § 9601(35)(B) and 40 C.F.R. Part 312, that will qualify a party to a commercial real estate transaction for one of the threshold criteria for satisfying the LLPs to CERCLA liability (42 U.S.C. §§ 9601(35)(A) & (B), §

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Appendix A | ASTM Terminology
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | A-2 9607(b)(3), § 9607(q), and § 9607(r)), assuming compliance with other elements of the defense.
approximate minimum search distance – the area for which records must be obtained and reviewed pursuant to Section 8 subject to the limitations provided in that section. This may include areas outside the subject property and shall be measured from the nearest subject property boundary. This term is used in lieu of radius to include irregularly shaped properties.
bona fide prospective purchaser (42 U.S.C. § 9607[r]) – person may qualify as a bona fide prospective purchaser if, among other requirements, such person made “all appropriate inquiries into the previous ownership and uses of the facility in accordance with generally accepted good commercial and customary standards and practices.” Knowledge of contamination resulting from all appropriate inquiries would not generally preclude this liability protection. A person must make all appropriate inquiries on or before the date of purchase. The facility must have been purchased after January 11, 2002. brownfields Amendments – amendments to CERCLA pursuant to the Small Business Liability Relief and Brownfields Revitalization Act, Pub. L. No. 107-118 (2002), 42 U.S.C. § 9601 et seq.
building department records – those records of the local government in which the subject property is located indicating permission of the local government to construct, alter, or demolish improvements on a property.
business environmental risk – a risk which can have a material environmental or environmentally-driven impact on the business associated with the current or planned use of commercial real estate, not necessarily related to those environmental issues required to be investigated in ASTM E 1527-21 Standard Practice. Consideration of BER issues may involve addressing one or more non-scope considerations, some of which are identified in ASTM E 1527-21 Standard Practice Section 13. commercial real estate – any real property except a dwelling or property with no more than four dwelling units exclusively for residential use (except that a dwelling or property with no more than four dwelling units exclusively for residential use is included in this term when it has a commercial function, as in the construction of such dwellings for profit). This term includes but is not limited to undeveloped real property and real property used for industrial, retail, office, agricultural, other commercial, medical, or educational purposes; property used for residential purposes that has more than four residential dwelling units;

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Appendix A | ASTM Terminology
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | A-3 and property with no more than four dwelling units for residential use when it has a commercial function, as in the building of such dwellings for profit. commercial and real estate transaction – a transfer of title to or possession of real property or receipt of a security interest in real property, except that it does not include transfer of title to or possession of real property or the receipt of a security interest in real property with respect to an individual dwelling or building containing fewer than five dwelling units, nor does it include the purchase of a lot or lots to construct a dwelling for occupancy by a purchaser, but a commercial real estate transaction does include real property purchased or leased by persons or entities in the business of constructing or developing dwelling units.
construction debris – concrete, brick, asphalt, and other such building materials discarded in the construction of a building or other improvement to property. contaminated public wells – public wells used for drinking water that have been designated by a government entity as contaminated by hazardous substances (for example, chlorinated solvents) or petroleum products, or as having water unsafe to drink without treatment. contiguous property owner (42 U.S.C. § 9607[q]) – a person may qualify for the contiguous property owner liability protection if, among other requirements, such person owns real property that is contiguous to, and that is or may be contaminated by hazardous substances from other real property that is not owned by that person. Furthermore, such person conducted all appropriate inquiries at the time of acquisition of the subject property and did not know or have reason to know that the subject property was or could be contaminated by a release or threatened release from the contiguous property. The all appropriate inquiries must not result in knowledge of contamination. If it does, then such person did “know” or “had reason to know” of contamination and would not be eligible for the contiguous property owner liability protection. controlled recognized environmental condition – recognized environmental condition affecting the subject property that has been addressed to the satisfaction of the applicable regulatory authority or authorities with hazardous substances or petroleum products allowed to remain in place subject to implementation of required controls (for example, activity and use limitations or other property use limitations). data failure – failure to achieve the historical research objective in ASTM E 1527-21 Standard Practice Section 8.3.1 even after reviewing the standard historical resources in Sections

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Appendix A | ASTM Terminology
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | A-4

8.3.4.1 through 8.3.4.8 that are reasonably ascertainable and likely to be useful. Data failure is one type of data gap.
data gap – a lack of or inability to obtain information required by this practice despite good faith efforts by the environmental professional to gather such information. Data gaps may result from incompleteness in any of the activities required by this practice, including, but not limited to, site reconnaissance (for example, an inability to conduct the site visit), and interviews (for example, an inability to interview the key site manager, regulatory officials, etc.).
de minimis condition – a condition related to a release that generally does not present a threat to human health or the environment and that generally would not be the subject of an enforcement action if brought to the attention of appropriate governmental agencies. A condition determined to be a de minimis condition is not a recognized environmental condition nor a controlled recognized environmental condition. demolition debris – concrete, brick, asphalt, and other such building materials discarded in the demolition of a building or other improvement to a property. drum – a container (typically, but not necessarily, holding 55 gal (208 L) of liquid) that may be used to store hazardous substances or petroleum products. dry wells – underground areas where soil has been removed and replaced with pea gravel, coarse sand, or large rocks. Dry wells are used for drainage, to control storm runoff, for the collection of spilled liquids (intentional and nonintentional), and wastewater disposal (often illegal).
due diligence – the process of inquiring into the environmental characteristics of commercial real estate or other conditions, usually in connection with a commercial real estate transaction.

The degree and kind of due diligence vary for different properties, and differing purposes. dwelling – structure or portion thereof used for residential habitation. engineering controls (EC) – physical modifications to a site or facility (for example, capping, slurry walls, or point of use water treatment) to reduce or eliminate the potential for exposure to hazardous substances or petroleum products in the soil or groundwater on a property. Engineering controls are a type of activity and use limitation (AUL).

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Appendix A | ASTM Terminology
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | A-5 environment – environment shall have the same meaning as the definition of environment in CERCLA 42 U.S.C. § 9601[8]).
environmental compliance audit – the investigative process to determine if the operations of an existing facility are in compliance with applicable environmental laws and regulations.

This term should not be used to describe this practice, although an environmental compliance audit may include an environmental site assessment or, if prior audits are available, may be part of an environmental site assessment. environmental lien – a charge, security, or encumbrance upon title to a property to secure the payment of a cost, damage, debt, obligation, or duty arising out of response actions, cleanup, or other remediation of hazardous substances or petroleum products upon a property, including (but not limited to) liens imposed pursuant to CERCLA 42 U.S.C. §§ 9607(1) & 9607(r) and similar state or local laws.
environmental professional – a person meeting the education, training, and experience requirements as set forth in 40 C.F.R. § 312.10(b). The person may be an independent contractor or an employee of the user.
environmental site assessment (ESA) – the process by which a person or entity seeks to determine if a subject property is subject to recognized environmental conditions. At the option of the user, an environmental site assessment may include more inquiry than that constituting all appropriate inquiries or, if the user is not concerned about qualifying for the LLPs, less inquiry than that constituting all appropriate inquiries. An environmental site assessment is both different from and often less rigorous than an environmental compliance audit.

ERNS list – EPA’s emergency response notification system list of reported CERCLA hazardous substance releases or spills in quantities greater than the reportable quantity, as maintained at the National Response Center. Notification requirements for such releases or spills are codified in 40 C.F.R. Parts 302 and 355.
fill dirt – dirt, soil, sand, or other earth, that is obtained off-site, that is used to fill holes or depressions, create mounds, or otherwise artificially change the grade or elevation of real property. It does not include material that is used in limited quantities for normal landscaping activities.
fire insurance maps – maps originally produced for fire insurance purposes that indicate uses of properties at specified dates.

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Appendix A | ASTM Terminology
Savi Ranch Parkway Widening/Connect Savi Ranch Project Phase I ISA | A-6 good faith – absence of any intention to seek an unfair advantage or to defraud another party; an honest and sincere intention to fulfill one’s obligations in the conduct or transaction concerned.
hazardous substance – a substance defined as a hazardous substance pursuant to CERCLA 42 U.S.C. § 9601(14), as interpreted by EPA regulations and the courts: “(A) any substance designated pursuant to section 1321(b)(2)(A) of Title 33, (B) any element, compound, mixture, solution, or substance designated pursuant to section 9602 of this title, (C) any hazardous waste having the characteristics identified under or listed pursuant to section 3001 of the Resource Conservation and Recovery Act of 1976 (RCRA), as amended, (42 U.S.C. § 6921) (but not including any waste the regulation of which under RCRA (42 U.S.C. § 6901 et seq.) has been suspended by Act of Congress), (D) any toxic pollutant listed under section 1317(a) of Title 33, (E) any hazardous air pollutant listed under section 112 of the Clean Air Act (42 U.S.C. § 7412), and (F) any imminently hazardous chemical substance or mixture with respect to which the Administrator (of EPA) has taken action pursuant to section 2606 of Title 15. The term does not include petroleum, including crude oil or any fraction thereof which is not otherwise specifically listed or designated as a hazardous substance under subparagraphs (A) through (F) of this paragraph, and the term does not include natural gas, natural gas liquids, liquefied natural gas, or synthetic gas usable for fuel (or mixtures of natural gas and such synthetic gas).” hazardous waste – any hazardous waste having the characteristics identified under or listed pursuant to section 3001 of RCRA, as amended, (42 U.S.C. § 6921) (but not including any waste the regulation of which under RCRA (42 U.S.C. §§ 6901-6992k) has been suspended by Act of Congress). RCRA is sometimes also identified as the Solid WasteDisposal Act.

RCRA defines a hazardous waste, at 42 U.S.C. § 6903, as: “a solid waste, or combination of solid wastes, which because of its quantity, concentration, or physical, chemical, or infectious characteristics may: (A) cause, or significantly contribute to an increase in mortality or an increase in serious irreversible, or incapacitating reversible, illness, or (B) pose a substantial present or potential hazard to human health or the environment when improperly treated, stored, transported, or disposed of, or otherwise managed.” hazardous waste/contaminated sites – sites on which a release has occurred, or is suspected to have occurred, of any hazardous substance, hazardous waste, or petroleum products, and that release or suspected release has been reported to a government entity. historical recognized environmental condition – a previous release of hazardous substances or petroleum products affecting the subject property that has been addressed to the

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Yorba Linda City CouncilJanuary 20, 2026

Yorba Linda City Council
January 20, 2026