Eastvale City Council
September 9, 2026

Project Number 1-0602 Page 19
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

Table 7-1
Foundation Design Parameters*
Allowable Bearing 2000 lbs/ft2 assuming a minimum footing width and embedment of 12 inches.

Lateral Bearing 250 lbs/ft2 at a depth of 12 inches plus 250 lbs/ft2 for each additional 12 inches of embedment to a maximum of 2000
lbs/ft2
Sliding Coefficient 0.35
Differential Settlement Dynamic: 0.5-inches in 40 feet
Static: 1.0-inch in 40 feet
*These values may be increased as allowed by Code to resist transient loads such as wind or seismic. Building code and structural design considerations may govern depth and reinforcement requirements and should be evaluated.

7.1.2 Post-Tensioned Slabs/Foundation Design Recommendations Post-tensioned slabs for the project may be preliminarily designed utilizing the parameters presented in Tables 7-1 and 7-2. The parameters presented herein are based on methodology provided in the Design of Post-Tensioned Slabs-On-Ground, Third Edition, by the Post-Tensioning Institute, in accordance with the 2022 CBC.

Project Number 1-0602 Page 20
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

TABLE 7-2

POST-TENSION SLAB DESIGN PARAMETERS
Category Expansion Potential Minimum
Embedment
Edge Lift Center Lift
Em (ft) Ym
(inch) Em (ft) Ym (inch)
I Very Low to Low 12 inches* 5.4 0.61 9.0 0.26
Slab Subgrade Moisture
Category I Minimum 110% of optimum moisture to a depth of 12 inches prior to pouring concrete
Embedment*
The minimum outer footing embedment presented herein are based on expansion indexes. The structural engineer should verify the minimum embedment based on the number of floors supported by the footings, the structural loading, and the requirements of the latest California Building Code. If mat slabs are utilized, alternate embedment depths can be provided.

Moisture Barrier
A moisture barrier should be provided in accordance with the recommendations presented in Section 7.2 The parameters presented herein are based on procedures presented in the Design of Post-Tensioned Slabs-OnGround, Third Edition. No corrections for vertical barriers at the edge of the slab, or for adjacent vegetation have been assumed. The design parameters are based on a Constant Suction Value of 3.9 pF.

7.2 Moisture Barrier
A moisture and vapor retarding system should be placed below the slabs-ongrade in portions of the structure considered to be moisture sensitive and should be capable of effectively preventing the migration of water and reducing the transmission of water vapor to acceptable levels. Historically, a 10-mil plastic membrane, such as Visqueen, placed between one to four inches of clean sand, has been used for this purpose. The use of this system or other systems can be considered, at the discretion of the designer, provided the system reduces the vapor transmission rates to acceptable levels.

Project Number 1-0602 Page 21
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

7.3 Seismic Design
The site classes were determined based on the referenced reports and published geologic maps in the area in general conformance with Chapter 20 of ASCE 7-16.

Based on the density of the underlying soils, a Site Class of D (shear wave velocity of 259 m/s) was selected. The seismic design parameters were calculated using a program based on the USGS website and ASCE 7-16 procedures. The resulting values are presented in Table 7-3. These values are applicable providing the exceptions presented in Supplements 2 and 3 of ASCE 7-16 are utilized in the design of the structure. If the design does not include the exception methodology, then a site-specific analysis shall be conducted.

TABLE 7-4 Seismic Ground Motion Values
2022 CBC and ASCE 7-16
Parameter Value
Site Class D
Site Latitude 33.9531
Site Longitude -117.6099
Spectral Response Acceleration Parameter, SS 1.714
Spectral Response Acceleration Parameter, S1 0.600
Site Coefficient, Fa 1.0
Site Coefficient, Fv 1.7
MCE Spectral Response Acceleration Parameter, SMS 1.714 MCE Spectral Response Acceleration Parameter, SM1 1.020 Design Spectral Response Acceleration Parameter, SDS 1.143 Design Spectral Response Acceleration Parameter, SD1 0.680 Peak Ground Acceleration, PGAM 0.768

Project Number 1-0602 Page 22
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

7.4 Block Walls
Block walls, if used, should be embedded a minimum of 2 feet below the lowest adjacent grade. Construction joints (not more than 20 feet apart) should be included in the block wall construction. Side yard walls should be structurally separated from the rear yard wall.

7.5 Footing Excavations
Soils from the footing excavations should not be placed in slab-on-grade areas unless properly compacted and tested. The excavations should be cleaned of all loose/sloughed materials and be neatly trimmed at the time of concrete placement. The Project Geotechnical Consultant should observe the footing excavations prior to the placement of concrete to determine that the excavations are founded in suitably compacted material.

7.6 Retaining Walls
Retaining walls should be founded on engineered fill and should be backfilled with granular soils that allow for drainage behind the wall. Foundations may be designed in accordance with the recommendations presented in Table 7-1, above. Unrestrained walls, free to horizontally move 0.0005H (for dense cohesionless backfill), may be designed to resist lateral pressures imposed by a fluid with a unit weight determined in accordance with the Table 7-5 below. The table also presents design parameters for restrained (at-rest) retaining walls.

These parameters may be used to design retaining walls that may be considered as restrained due to the method of construction or location (corner sections of unrestrained retaining walls).

TABLE 7-5
Equivalent Fluid Pressures for 90% Compacted Fill (Select Material) Backfill Active Pressure (psf/ft) At-Rest Pressure (psf/ft) Level 35 55

Project Number 1-0602 Page 23
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

Per the requirements of the 2022 CBC, the seismic force acting on the retaining walls with backfill exceeding 6-feet in height may be resolved utilizing the formula

15.5H2 lb/lineal ft (H=height of the wall). This force acts at approximately 0.6H above the base of the wall (inverted triangle). The seismic value can be converted as required by the retaining wall engineer. Retaining walls should be designed in general accordance with Section 1807A.2 of the 2022 CBC.  Restrained retaining walls should be designed for “at-rest” conditions.  The design loads presented in the above table are to be applied on the retaining wall in a horizontal fashion and as such friction between wall and retained soils should not be allowed in the retaining wall analyses.  Additional allowances should be made in the retaining wall design to account for the influence of construction loads, temporary loads, and possible nearby structural footing loads.
 Select backfill should be granular, structural quality backfill with a Sand Equivalent of 20 or better and an ASCE Expansion Index of 20 or less. The backfill must encompass the full active wedge area. The upper one foot of backfill should be comprised of native on-site soils (see Plate A).  The wall design should include waterproofing (where appropriate) and backdrains or weep holes for relieving possible hydrostatic pressures. The backdrain should be comprised of a 4-inch perforated PVC pipe in a 1 ft. by 1 ft., ¾-inch gravel matrix, wrapped with a geofabric. The backdrain should be installed with a minimum gradient of 2 percent and should be outletted to an appropriate location. For subterranean walls this may include drainage by sump pumps.
 No backfill should be placed against concrete until minimum design strengths are achieved.

It should be noted that the allowable bearing and lateral bearing values presented in Table 7-1 are based on level conditions at the toe. Modified design parameters can be presented for retaining walls with sloping condition at the toe.

Other conditions should be evaluated on a case-by-case basis.

RETAINING WALL BACKFILL DETAIL
NATIVE

BACKFILL
12 tN. MtN.
*OR AS MODIFIED

BY A SPECIFIC REPORT
DRAIN I.ATERALLY,

OR PROVIDE WEEP

HOLES AS REQUIRED

TO DMIN
PIPE: 4-INCH PERFORATED PVC, SCHEDULE 40, SDR35 OR APPROVED ALTERNATE MINIMUM 8 PERFORATIONS (1/4-IN. DIA.) PER LINEAL FT. IN BOTTOM HALF OF PIPE
ROCK: MINIMUM VOLUME OF 1 CU. FT. OF 3/4_IN. MAX. ROCK PER. LINEAL FOOT

OF PIPE, OR APPROVED ALTERNATE
FILTER FABRIC: MIRAFI 140 FILTER FABRIC OR APPROVED EQUIVALENT "64
ALTA cALTFoRNTA eEorEcl{NrcAL, tNc,
'vER, tTto PI-ATE A
PATH: S\Drofllns\ALTA GEoTECHNICAI\GRAoING DETAIIS\PLATE A.dws

Project Number 1-0602 Page 24
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

7.7 Exterior Slabs and Walkways
Exterior concrete slabs and walkways should be designed and constructed in consideration of the following recommendations.

7.7.1 Subgrade Compaction
The subgrade below exterior concrete slabs should be compacted to a minimum of 90 percent relative compaction as determined by ASTM Test Method: D 1557.

7.7.2 Subgrade Moisture
The subgrade below concrete slabs should be moisture conditioned to a minimum of 110 percent of optimum moisture (low expansion) prior to concrete placement.

7.7.3 Concrete Slab Thickness
Concrete flatwork and driveways should be designed utilizing four-inch minimum thickness.

7.7.4 Concrete Slab Reinforcement
Utilization of reinforcement for flatwork and driveways is subject to a cost/benefit analysis. Reinforcement will decrease the amount of cracking that may occur in flatwork, however, planning for occasional repairs may be more cost effective. Utilizing closely spaced control joints is likely more cost-effective than utilizing reinforcement. The majority of the soils onsite are classified as very low in expansion potential.

Consideration should be given to reinforcing flatwork with irregular (nonsquare/rectangular) shapes.

7.7.5 Control Joints
Weakened plane joints should be installed on walkways at intervals of approximately eight feet (maximum) or less. Exterior slabs should be designed to withstand shrinkage of the concrete.

Project Number 1-0602 Page 25
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

7.8 Concrete Design
As stated in Section 5.1.7, negligible concentrations of sulfates were detected in the onsite soils. Therefore, the use of sulfate resistant concrete is not required per ACI 318-14 at this time. Post-grading conditions should be evaluated, and final recommendations made at that time.

7.9 Corrosion
Based on preliminary testing, the onsite soils are corrosive to buried metal objects. Consideration should be given to protecting buried metals from corrosion. Typical measures may include using non-corrosive backfill, protective coatings, wrapping, plastic pipes, or a combination of these methods. A corrosion engineer should be consulted if specific design recommendations are required by the improvement designer.

Per ACI 318-14, an exposure class of C1 would be applicable to metals encased in concrete (rebar in footings) due to being exposed to moisture from surrounding soils. Per Table 19.3.2.1 of ACI 318-14, the requirements for concrete with an exposure class of C1 are a minimum compressive strength of 2500 psi and a maximum water-soluble chloride ion content in concrete of 0.30 (percent by weight of cement).

7.10 Site Drainage
Positive drainage away from the proposed structures should be provided and maintained. Roof, pad and lot drainage should be collected and directed away from the structures toward approved disposal areas through drainage terraces, gutters, down drains, and other devices. Design fine grade elevations should be maintained through the life of the structure or if design fine grade elevations are altered, adequate area drains should be installed in order to provide rapid discharge of water, away from structures. Residents or Homeowner Associations should be made aware that they are responsible for maintenance and cleaning of

Project Number 1-0602 Page 26
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.
all drainage terraces, down drains, and other devices that have been installed to promote site and structure drainage.

7.11 Pavement Design
Pavement sections for the proposed streets shall be designed based on laboratory testing conducted on samples taken from the soil subgrade.

Preliminarily, based on an assumed R-Value of 30, the pavement may be designed utilizing the sections presented in Table 7-6. These sections should be verified upon the completion of grading, based on R-Value testing.

Table 7-6
Preliminary Pavement Sections
Traffic
Index
Pavement Section Options
OR

5.0 3-inch AC on 5.5-inch AB 4-inch AC on 4-inch AB

5.5 3-inch AC on 7-inch AB 4-inch AC on 5-inch AB

6.0 3.5-inch AC on 7.5-inch AB 4-inch AC on 6.5-inch AB AC-Asphalt Concrete
AB-Caltrans Class II Base
The underlying subgrade soil should be suitably moisture conditioned, processed and compacted to a minimum 90 percent of the laboratory maximum density (ASTM: D 1557) to at least twelve (12) inches below subgrade. After subgrade compaction, the exposed grade should then be "proof"-rolled with heavy equipment to ensure the grade does not "pump" and is verified as non-yielding.

Aggregate base should consist of Class 2 (Caltrans) aggregate base and should be compacted to at least 95 percent of the maximum laboratory dry density as determined in accordance with ASTM Test Method: D 1557.

Preparation for compaction operations and pavement construction operations should be accomplished in accordance with the current requirements of the City of Eastvale and under the observation and testing of the project geotechnical consultant.

Project Number 1-0602 Page 27
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

8.0 LOT MAINTENANCE
Ongoing maintenance of the improvements is essential to the long-term performance of structures. As such, the owners must implement certain maintenance procedures. The attached " Maintenance and Improvement Considerations" presented in the Appendix E may be included as part of the sales packet to educate the owners in issues related to drainage, maintenance, backyard improvements, etc. The following recommendations should also be implemented.

8.1 Lot Drainage
Roof, pad and lot drainage should be collected and directed away from structures and slopes and toward approved disposal areas. Design fine grade elevations should be maintained through the life of the structure or if design fine grade elevations are altered, adequate area drains should be installed in order to provide rapid discharge of water, away from structures and slopes. Residents should be made aware that they are responsible for maintenance and cleaning of all drainage terraces, down drains, and other devices that have been installed to promote structure and slope stability.

8.2 Burrowing Animals
Residents or owners should undertake a program for the elimination of burrowing animals.

9.0 FUTURE PLAN REVIEWS
This report represents a geotechnical review of the site. As the project design for the project progresses, site specific geologic and geotechnical issues should be considered in the design and construction of the project. Consequently, future plan reviews may be necessary. These reviews may include reviews of:
 Grading Plans
 Foundation Plans
 Utility Plans

Project Number 1-0602 Page 28
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

These plans should be forwarded to the project Geotechnical Consultant for review.

10.0 CLOSURE

10.1 Geotechnical Review
For the purposes of this report, multiple working hypotheses were established for the project, utilizing the available data and the most probable model is used for the analysis. Future information collected during the proposed grading operations is intended to evaluate the hypothesis and as such, some of the assumptions summarized in this report may need to be changed. Some modifications of the grading recommendations may become necessary, should the conditions encountered in the field differ from the conditions hypothesized in this report.

Plans and sections of the project specifications should be reviewed by Alta to evaluate conformance with the intent of the recommendations contained in this report. If the project description or final design varies from that described in herein, Alta must be consulted regarding the applicability of the recommendations contained herein and whether any changes are required. Alta accepts no liability for any use of its recommendations if the project description or final design varies and Alta is not consulted regarding the alterations.

10.2 Limitations
This report is based on the following: 1) the project as presented on the attached plan; 2) the information obtained from Alta's laboratory testing included herein; and 3) from the information presented in the referenced reports. The findings and recommendations are based on the results of the subsurface investigation, laboratory testing, and office analysis combined with an interpolation and extrapolation of conditions between and beyond the subsurface excavation locations. However, the materials adjacent to or beneath those observed may have different characteristics than those observed, and no precise

Project Number 1-0602 Page 29
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.
representations are made as to the quality or extent of the materials not observed. The results reflect an interpretation of the direct evidence obtained.

Work performed by Alta has been conducted in a manner consistent with the level of care and skill ordinarily exercised by members of the geotechnical profession currently practicing in the same locality under similar conditions. The methods used to develop the recommendations do not comprise an exact science and are not a guarantee that the interaction between the soils and proposed structures shall perform as planned. No other representation, either expressed or implied, and no warranty or guarantee is included or intended.

The recommendations presented in this report are based on the assumption that an appropriate level of field review will be provided by a geotechnical consultant who is familiar with the design and site geologic conditions. That field review shall be sufficient to confirm that geotechnical and geologic conditions exposed during grading are consistent with the geologic representations and corresponding recommendations presented in this report.

The conclusions and recommendations included in this report are applicable to the specific design of this project as discussed in this report. They have no applicability to any other project or to any other location and any and all subsequent users accept any and all liability resulting from any use or reuse of the data, opinions, and recommendations without the prior written consent of Alta.

Alta has no responsibility for construction means, methods, techniques, sequences, procedures, safety precautions, programs in connection with the construction, acts or omissions of the CONTRACTOR or any other person performing any of the construction, or for the failure of any of them to carry out the construction in accordance with the final design drawings and specifications.

ALTA CALIFORNIA GEOTECHNICAL, INC.

APPENDIX A

REFERENCES

Project Number 1-0602 Page A-1
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

APPENDIX A
Selected References
California Geological Survey, 2018, Earthquake Fault Zones, A Guide for Government Agencies, Property Owners/Developers, and Geoscience Practitioners for Assessing Fault Rupture Hazards in California, Special Publication 42, Revised 2018.

California Geological Survey, 2000, Earthquake Zones of Required Investigation Ontario Quadrangle, Scale 1:24,000, Official Map Released November 17, 2000.

California Code of Regulations, 2022, California Building Code, Title 24, Part 2, Volume 2, Based on the 2021 International Building Code, Effective Date January 1, 2023.

California Department of Transportation (Caltrans), 2022, Caltrans Geotechnical Manual, published March, 2022.

California Department of Water Resources, Water Data Library (WDL) Station Map, https://wdl.water.ca.gov/, accessed December, 2024.

Historic Aerials, 2024, www.historicaerials.com, by NETROnline, Copyright 2023, accessed December, 2024, online review of vintage air photos from 1938-2018.

Jennings, C. W., 1985, An explanatory text to accompany the 1:750,000 scale fault and geologic maps of California: California Division of Mines and Geology, Bulletin 201, 197 p.

Jennings, C.W., and Bryant, W.A., 2010, Fault Activity Map of California: California Geological Survey Geologic Data Map No. 6, map scale 1:750,000.

Jennings, C. W., and Bryant, W.A., 2010, An explanatory text to accompany the 1:750,000 scale fault and geologic map of California: California Division of Mines and Geology, special publication 42, revised 1985, 24 p.

Morton, D. M., 2003, Preliminary Geologic Map of the Fontana 7.5’ Quadrangle, Riverside and San Bernardino Counties, California, U.S. Geological Survey, Open-Fire Report OF-2003-418.

Romanoff, Melvin, 1989, Underground Corrosion, NBS Circular 579, Reprinted by NACE, Houston, TX, 1989.

U.S. Geological Survey, 2008, National Seismic Hazards Maps – Source Parameters, http://geohazards.usgs.gov/cfusion/hazfaults_2008_search/query_main.cfm.

ALTA CALIFORNIA GEOTECHNICAL, INC.

APPENDIX B
Subsurface Investigation

Project Number 1-0602 Page B-1
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

APPENDIX B
Subsurface Investigation
Alta's subsurface investigation consisted of excavating, logging, and sampling five (5) hollowstem auger borings. Details of the subsurface investigation are presented in Table B. The approximate location of the exploratory excavation is shown on the accompanying Plate 1 and the Geotechnical Logs are attached.

TABLE B

SURFACE INVESTIGATION DETAILS
Equipment Range of
Depths
Sampling Methods Sample Locations
Hollowstem auger Up to 51.5
feet

1. Bulk

2. Ring Samples

3. SPT Samples

1. Bulk-Select Depth

2. Every 2.5 to 5-feet

3. At depths below 30 feet.

UNIFIED SOI L CLASSIFIICATION SYSTEM
Major Divisions lfl tr Description Major Divisions an tr Coarse
Grained
Soils
N4ore than
50%
retained on
No 200
steve
Gravel
and
Sravelly
Soils
han 50%
frachon
relained
on No, 4
'l
ts
*
,-l*
EIF
GW
Well-graded grcvels or gravel sand
mixtures, little or no fines
Fine
(lrained
isoils
l\lore than
Silts
And
Clays
LL,<50
n
ML
Inorganic silts and very fine sands,
rock flour, silty or clayey fine sands
or clavev silts with slioht olasticitv
GP
Poorly-graded gravels or gravel
sand mixture, little or no fines CL
Inorganic clays of low to medium
plasticity, gravelly clays, sandy
clays, silty clays, lean clays Silty gravels, gravel-sand-silt mixtures
OL
Organic silts and organic silt-clays
of low plasticity
Clayey gravels, gravel-sand-clay
mixtures
Silts
And
Clays
LL,<50
MF
Inorganic silts, micaceous or
diatomaceous fine or silty soils,
elastic silts Sand
and
Sandy
Soils
than 50%
fraclion
Passes
on No, 4
i'+.
3_'. JV!
Well-graded sands or gravelly
sands, little or no fines
on No 200
steve VH
Inorganic clays of high plasticity,
fat clays SP
Poorly-graded sands or gravelly
sands, little or no fines
SM Silty sands, sarrd-silt mixtures OF
Organic clays of medium to high
plasticity
sc Clayey sands, and-clay mixtures Highly Organic
Soils PT Peat and other highly organic soils
BoUNDARY CLASSIFICATIoN: Soils possessing characteristics of two groups are designated by combinations of group symbols PARTICLE SIZ:E LIMITS
U.S. STANDA,RD SiERIES SIEVE
200 40 10 4

CLEAR SQUARE SIEVE OPENINGS
3t4" 3,, ,t2"

LABORATORY TESTS
Symbol Tesl
DS
DSR
cc)N
SA
MAX
RV
EI
SE
AL
CHEM
HY
Direct Shear
Direct Shear
(Remolded)
Sieve Analysis
Maximum Density
Resistance (R) Value
Expansion Index
Sand Equivalent
Atterberg Limits
Chemical Analysis
Hydrometer Analysis

SOIL MOISTURE

SIZE PROPORTIONS
Trace - <5%
Few-5to10%
Some - 15 to 25%
Increasing \/isual Moisture Content
Silts
an0
Clays
Sand Gravel
Cobbles Boulders
Fine Medium Coarsi€r Fine Coarse

RELATIVE DENSITY
Sands and Gravels Blows/Foot (SPT)
Very Loose
Loose
Medium Dense
Dense
Very Dense
<4
4-10
11-30
31 -50
>50

CON SI STENCY C IASSI FI CATI ON
Silts and Clays Criteria
Very Soft
Soft
Firm
stiff
Very Stiff
Thumb penetrates soil >1 in.

Thumb penetrates soil 1 in,
Thumb penetrates soil 1/4 in
Readily indented with thumbnail
Thumbnail will not indent soil

HARDNESS
KEY TO EXPLORATORY BORING LOGS}
,n
/L>//J, ALTA CALIFORNTA GEOTECHNTCAL tNC.
/\

PI-ATE B

CL
ML
CL
SC
SP
SC
SP
YOUNG ALLUVIAL FAN DEPOSITS (Qyf): SILTY CLAY, pale
brown, dry, stiff, trace roots.
@ 2.0 ft. light gray, very stiff.
@5.0 ft. SANDY SILT, pale brown, dry, very stiff, carbonates. @9.6 ft SANDY CLAY, olive brown, iron oxides, slightly moist, very stiff, trace gravel, fine grained sand.
@15.0 ft. fine to coarse sand.
@20.0 ft. CLAYEY SAND, fine to medium grained, grayish brown, iron oxides, moist, medium dense, lenses of light grayish brown sand.
@25.0 ft. SAND, fine to medium grained, light grayish brown, iron oxides, moist, very dense, trace clay.
@30.0 ft. CLAYEY SAND, fine to medium grained, dark yellowish brown, iron oxides, moist, medium dense, trace gravel.
@35.0 ft. SAND, fine to coarse grained, dark yellowish brown, iron oxides, moist, very dense, trace clay, trace gravel.

Continued;
R
R
R
R
R
R
S
S
28 22
16 33
24 39,50 for
5"
7,7,11
28,22,44
81 90
87 34
105
102
102
108

23.2 18.3

17.6 21.2

20.4 6.9

19.8 6.0
140 lbs
7500 Hellman Ave
1 OF 2
30 in.

B-1
40 580
5 10
15 20
25 30
35 TYPE OF DRILL RIG
DRILLER SAT- MOISTURE CONT (%)
4/17/25
(%) URATION
DATE STARTED 4/17/25
580
575
570
565
560
555
550
545
540

GEOTECHNICAL DESCRIPTION OTHER TESTS

S SPT (SPLIT SPOON) SAMPLE

R RING (DRIVE) SAMPLE
SAMPLE TYPES:

SHEET
NOTE

LOGGED BY GROUP
J: JOINTING
B: BEDDING
S: SHEAR
C: CONTACT
F: FAULT
RS: RUPTURE SURFACE
1-0602

GROUNDWATER

SEEPAGE
(Feet)
PROJECT NO.

GEOTECHNICAL BORING LOG
GROUND ELEV.
8" Hollow Stem Auger
2R Drilling Inc. SYMBOL LITHOLOGY BLOWS
B BULK SAMPLE T TUBE SAMPLE TYPE SAMPLE ELEV DRY (pcf) DENSITY BORING DESIG.

DROP
DRIVE WT.

GW DEPTH (FT)

PROJECT NAME

DATE FINISHED NL DEPTH
Alta California Geotechnical, Inc.

P.N. 1-0602 PLATE B-1

Continued;
YOUNG ALLUVIAL FAN DEPOSITS (Qyf): SAND, fine to coarse grained, grayish brown, iron oxides, wet, dense, trace gravel. @40.1 ft. Groundwater Encountered
@45.0 ft. trace clay.
@50.0 ft. medium dense.

TOTAL DEPTH : 51.5 FEET
GROUNDWATER ENCOUNTERED @ 40.08 FEET

NO CAVING OBSERVED
S
S
S
18,22,26
20,19,25
12,8,12

20.0 17.0

15.0 140 lbs
7500 Hellman Ave
2 OF 2
30 in.

B-1
40 580
45 50

TYPE OF DRILL RIG
DRILLER SAT- MOISTURE CONT (%)
4/17/25
(%) URATION
DATE STARTED 4/17/25
540
535
530

GEOTECHNICAL DESCRIPTION OTHER TESTS

S SPT (SPLIT SPOON) SAMPLE

R RING (DRIVE) SAMPLE
SAMPLE TYPES:

SHEET
NOTE

LOGGED BY GROUP
J: JOINTING
B: BEDDING
S: SHEAR
C: CONTACT
F: FAULT
RS: RUPTURE SURFACE
1-0602

GROUNDWATER

SEEPAGE
(Feet)
PROJECT NO.

GEOTECHNICAL BORING LOG
GROUND ELEV.
8" Hollow Stem Auger
2R Drilling Inc. SYMBOL LITHOLOGY BLOWS
B BULK SAMPLE T TUBE SAMPLE TYPE SAMPLE ELEV DRY (pcf) DENSITY BORING DESIG.

DROP
DRIVE WT.

GW DEPTH (FT)

PROJECT NAME

DATE FINISHED NL DEPTH
Alta California Geotechnical, Inc.

P.N. 1-0602 PLATE B-1

CL
SC
CL
SC
YOUNG ALLUVIAL FAN DEPOSITS (Qyf): SILTY CLAY, pale
brown, dry, stiff, trace roots.
@2.0 ft. light gray, very stiff.
@5.0 ft. pale brown, slightly moist, carbonates.
@10.0 ft. CLAYEY SAND, fine to coarse grained, olive brown, iron oxides, moist, medium dense, trace gravel.
@15.0 ft. SANDY CLAY, dark grayish brown, iron oxides, moist, very stiff, trace roots, fine grained sand.
@20.0 ft. brown, stiff.
@25.0 ft. CLAYEY SAND, fine grained, light grayish brown, iron oxides, moist, dense.

TOTAL DEPTH : 26 FEET

NO GROUNDWATER ENCOUNTERED

NO CAVING OBSERVED
R
R
R
R
R
R
66 26
27 21
12 34
32 76
77 95
85 119
91 89

15.5 11.5

11.1 23.8

46.7 30.6
140 lbs
7500 Hellman Ave
1 OF 1
30 in.
580 B-2
5 10
15 20
25 TYPE OF DRILL RIG
DRILLER SAT- MOISTURE CONT (%)
4/17/25
(%) URATION
DATE STARTED 4/17/25
580
575
570
565
560
555

GEOTECHNICAL DESCRIPTION OTHER TESTS

S SPT (SPLIT SPOON) SAMPLE

R RING (DRIVE) SAMPLE
SAMPLE TYPES:

SHEET
NOTE

LOGGED BY GROUP
J: JOINTING
B: BEDDING
S: SHEAR
C: CONTACT
F: FAULT
RS: RUPTURE SURFACE
1-0602

GROUNDWATER

SEEPAGE
(Feet)
PROJECT NO.

GEOTECHNICAL BORING LOG
GROUND ELEV.
8" Hollow Stem Auger
2R Drilling Inc. SYMBOL LITHOLOGY BLOWS
B BULK SAMPLE T TUBE SAMPLE TYPE SAMPLE ELEV DRY (pcf) DENSITY BORING DESIG.

DROP
DRIVE WT.

GW DEPTH (FT)

PROJECT NAME

DATE FINISHED NL DEPTH
Alta California Geotechnical, Inc.

P.N. 1-0602 PLATE B-2

CL
ML
SP
CL
SC
YOUNG ALLUVIAL FAN DEPOSITS (Qyf): SILTY CLAY, pale
brown, dry, stiff, trace roots.
@2.0 ft. moist, very stiff, iron oxides, carbonates, some fine grained sand, trace roots.
@5.0 ft. SANDY SILT, brown, moist, very stiff, iron oxides, carbonates, fine grained sand.
@10.0 ft. olive brown, fine to medium grained sand.
@15.0 ft. SAND, fine to coarse grained, light yellowish brown, iron oxides, moist, very dense.
@20.0 ft. SANDY CLAY, grayish brown, iron oxides, moist, stiff, fine grained sand.
@25.0 ft. CLAYEY SAND, fine to medium grained, grayish brown, iron oxides, moist, medium dense.

TOTAL DEPTH : 26 FEET

NO GROUNDWATER ENCOUNTERED

NO CAVING OBSERVED
R
R
R
R
R
R
24 48
19 56
11 24
83 83
44 99
106
105
114
89 30.0

17.5 18.1

7.5 45.8

32.0 140 lbs
7500 Hellman Ave
1 OF 1
30 in.
580 B-3
5 10
15 20
25 TYPE OF DRILL RIG
DRILLER SAT- MOISTURE CONT (%)
4/17/25
(%) URATION
DATE STARTED 4/17/25
580
575
570
565
560
555

GEOTECHNICAL DESCRIPTION OTHER TESTS

S SPT (SPLIT SPOON) SAMPLE

R RING (DRIVE) SAMPLE
SAMPLE TYPES:

SHEET
NOTE

LOGGED BY GROUP
J: JOINTING
B: BEDDING
S: SHEAR
C: CONTACT
F: FAULT
RS: RUPTURE SURFACE
1-0602

GROUNDWATER

SEEPAGE
(Feet)
PROJECT NO.

GEOTECHNICAL BORING LOG
GROUND ELEV.
8" Hollow Stem Auger
2R Drilling Inc. SYMBOL LITHOLOGY BLOWS
B BULK SAMPLE T TUBE SAMPLE TYPE SAMPLE ELEV DRY (pcf) DENSITY BORING DESIG.

DROP
DRIVE WT.

GW DEPTH (FT)

PROJECT NAME

DATE FINISHED NL DEPTH
Alta California Geotechnical, Inc.

P.N. 1-0602 PLATE B-3

CL
SM
CL
SP
SC
CL
YOUNG ALLUVIAL FAN DEPOSITS (Qyf): SILTY CLAY, light
brown, dry, stiff, trace roots.
@2.0 ft. light gray, very stiff, trace gravel.
@5.0 ft. SILTY SAND, very fine to fine grained, brown, slightly moist, dense, carbonates.
@10.0 ft. SANDY CLAY, light brown, moist, vey stiff, trace gravel, fine to coarse grained sand.
@15.0 ft. yellowish brown, iron oxides, fine to medium grained sand. @20.0 ft. dark grayish brown, manganese oxides, stiff, fine grained sand.
@25.0 ft. SAND, fine to coarse grained, grayish brown, moist, very dense, trace clay.
@30.0 ft. CLAYEY SAND, fine grained, dark gray, iron oxides, moist, loose, trace roots.
@35.0 ft. SANDY CLAY, dark gray, moist, firm. manganese oxides, fine grained sand.

Continued;
R
R
R
R
R
R
S
S
76 30
24 22
11 66
7,3,4
3,3,3
72 48
98 88
91 99
83 98

6.0 17.1

22.2 12.2

36.8 22.8

36.3 140 lbs
7500 Hellman Ave
1 OF 2
30 in.
580 B-4
5 10
15 20
25 30
35 TYPE OF DRILL RIG
DRILLER SAT- MOISTURE CONT (%)
4/17/25
(%) URATION
DATE STARTED 4/17/25
580
575
570
565
560
555
550
545
540

GEOTECHNICAL DESCRIPTION OTHER TESTS

S SPT (SPLIT SPOON) SAMPLE

R RING (DRIVE) SAMPLE
SAMPLE TYPES:

SHEET
NOTE

LOGGED BY GROUP
J: JOINTING
B: BEDDING
S: SHEAR
C: CONTACT
F: FAULT
RS: RUPTURE SURFACE
1-0602

GROUNDWATER

SEEPAGE
(Feet)
PROJECT NO.

GEOTECHNICAL BORING LOG
GROUND ELEV.
8" Hollow Stem Auger
2R Drilling Inc. SYMBOL LITHOLOGY BLOWS
B BULK SAMPLE T TUBE SAMPLE TYPE SAMPLE ELEV DRY (pcf) DENSITY BORING DESIG.

DROP
DRIVE WT.

GW DEPTH (FT)

PROJECT NAME

DATE FINISHED NL DEPTH
Alta California Geotechnical, Inc.

P.N. 1-0602 PLATE B-4

CL
CL
Continued;
YOUNG ALLUVIAL FAN DEPOSITS (Qyf): SILTY CLAY, gray,
moist, firm, manganese oxides.
@45.0 ft. SANDY CLAY, gray, moist, firm, fine grained sand. @50.0 ft. light yellowish brown, iron oxides, moist, very stiff, fine to medium grained.

TOTAL DEPTH : 51.5 FEET

NO GROUNDWATER ENCOUNTERED

NO CAVING OBSERVED
S
S
S
1,2,3
1,3,5
10,11,12

35.0 28.0
140 lbs
7500 Hellman Ave
2 OF 2
30 in.
580 B-4
45 50

TYPE OF DRILL RIG
DRILLER SAT- MOISTURE CONT (%)
4/17/25
(%) URATION
DATE STARTED 4/17/25
540
535
530

GEOTECHNICAL DESCRIPTION OTHER TESTS

S SPT (SPLIT SPOON) SAMPLE

R RING (DRIVE) SAMPLE
SAMPLE TYPES:

SHEET
NOTE

LOGGED BY GROUP
J: JOINTING
B: BEDDING
S: SHEAR
C: CONTACT
F: FAULT
RS: RUPTURE SURFACE
1-0602

GROUNDWATER

SEEPAGE
(Feet)
PROJECT NO.

GEOTECHNICAL BORING LOG
GROUND ELEV.
8" Hollow Stem Auger
2R Drilling Inc. SYMBOL LITHOLOGY BLOWS
B BULK SAMPLE T TUBE SAMPLE TYPE SAMPLE ELEV DRY (pcf) DENSITY BORING DESIG.

DROP
DRIVE WT.

GW DEPTH (FT)

PROJECT NAME

DATE FINISHED NL DEPTH
Alta California Geotechnical, Inc.

P.N. 1-0602 PLATE B-4

CL
CL
SP
YOUNG ALLUVIAL FAN DEPOSITS (Qyf): SILTY CLAY, pale
brown, dry, stiff, trace roots.
@2.0 ft. SANDY CLAY, light brown, slightly moist, very stiff, carbonates, trace roots, fine grained sand.
@5.0 ft. moist, trace gravel.
@10.0 ft. light yellowish brown.
@15.0 ft. light brown, stiff.
@20.0 ft. iron oxides, very stiff, trace roots.
@25.0 ft. SAND, fine grained, gray, iron oxides, moist, dense, trace clay, trace roots.

TOTAL DEPTH : 26 FEET

NO GROUNDWATER ENCOUNTERED

NO CAVING OBSERVED
R
R
R
R
R
R
27 21
44 13
24 43
87 88
59 22
92 89
97 95

14.8 26.1

13.4 28.5

15.8 6.1
140 lbs
7500 Hellman Ave
1 OF 1
30 in.
580 B-5
5 10
15 20
25 TYPE OF DRILL RIG
DRILLER SAT- MOISTURE CONT (%)
4/17/25
(%) URATION
DATE STARTED 4/17/25
580
575
570
565
560
555

GEOTECHNICAL DESCRIPTION OTHER TESTS

S SPT (SPLIT SPOON) SAMPLE

R RING (DRIVE) SAMPLE
SAMPLE TYPES:

SHEET
NOTE

LOGGED BY GROUP
J: JOINTING
B: BEDDING
S: SHEAR
C: CONTACT
F: FAULT
RS: RUPTURE SURFACE
1-0602

GROUNDWATER

SEEPAGE
(Feet)
PROJECT NO.

GEOTECHNICAL BORING LOG
GROUND ELEV.
8" Hollow Stem Auger
2R Drilling Inc. SYMBOL LITHOLOGY BLOWS
B BULK SAMPLE T TUBE SAMPLE TYPE SAMPLE ELEV DRY (pcf) DENSITY BORING DESIG.

DROP
DRIVE WT.

GW DEPTH (FT)

PROJECT NAME

DATE FINISHED NL DEPTH
Alta California Geotechnical, Inc.

P.N. 1-0602 PLATE B-5

CL
SC
YOUNG ALLUVIAL FAN DEPOSITS (Qyf): SILTY CLAY, pale
brown, dry, stiff, trace roots.
@2.0 ft. light gray.
@5.0 ft. pale brown, slightly moist, carbonates.
@10.0 ft. CLAYEY SAND, fine to coarse grained, olive brown, iron oxides, moist, medium dense, trace gravel.

TOTAL DEPTH : 10 FEET

NO GROUNDWATER ENCOUNTERED

NO CAVING OBSERVED
N/A
7500 Hellman Ave
1 OF 1
N/A
580 P-1
5 10

TYPE OF DRILL RIG
DRILLER SAT- MOISTURE CONT (%)
4/17/25
(%) URATION
DATE STARTED 4/17/25
580
575
570

GEOTECHNICAL DESCRIPTION OTHER TESTS

S SPT (SPLIT SPOON) SAMPLE

R RING (DRIVE) SAMPLE
SAMPLE TYPES:

SHEET
NOTE

LOGGED BY GROUP
J: JOINTING
B: BEDDING
S: SHEAR
C: CONTACT
F: FAULT
RS: RUPTURE SURFACE
1-0602

GROUNDWATER

SEEPAGE
(Feet)
PROJECT NO.

GEOTECHNICAL BORING LOG
GROUND ELEV.
8" Hollow Stem Auger
2R Drilling Inc. SYMBOL LITHOLOGY BLOWS
B BULK SAMPLE T TUBE SAMPLE TYPE SAMPLE ELEV DRY (pcf) DENSITY BORING DESIG.

DROP
DRIVE WT.

GW DEPTH (FT)

PROJECT NAME

DATE FINISHED NL DEPTH
Alta California Geotechnical, Inc.

P.N. 1-0602 PLATE B-6

CL
CL
YOUNG ALLUVIAL FAN DEPOSITS (Qyf): SILTY CLAY, light
brown, dry, stiff, trace roots.
@2.0 ft. light gray, very stiff, trace gravel.
@4.8 ft. brown, slightly moist, carbonates.
@10.0 ft. SANDY CLAY, light brown, moist, very stiff, trace gravel, fine to coarse grained sand.

TOTAL DEPTH : 10 FEET

NO GROUNDWATER ENCOUNTERED

NO CAVING OBSERVED
N/A
7500 Hellman Ave
1 OF 1
N/A
580 P-2
5 10

TYPE OF DRILL RIG
DRILLER SAT- MOISTURE CONT (%)
4/17/25
(%) URATION
DATE STARTED 4/17/25
580
575
570

GEOTECHNICAL DESCRIPTION OTHER TESTS

S SPT (SPLIT SPOON) SAMPLE

R RING (DRIVE) SAMPLE
SAMPLE TYPES:

SHEET
NOTE

LOGGED BY GROUP
J: JOINTING
B: BEDDING
S: SHEAR
C: CONTACT
F: FAULT
RS: RUPTURE SURFACE
1-0602

GROUNDWATER

SEEPAGE
(Feet)
PROJECT NO.

GEOTECHNICAL BORING LOG
GROUND ELEV.
8" Hollow Stem Auger
2R Drilling Inc. SYMBOL LITHOLOGY BLOWS
B BULK SAMPLE T TUBE SAMPLE TYPE SAMPLE ELEV DRY (pcf) DENSITY BORING DESIG.

DROP
DRIVE WT.

GW DEPTH (FT)

PROJECT NAME

DATE FINISHED NL DEPTH
Alta California Geotechnical, Inc.

P.N. 1-0602 PLATE B-7

ALTA CALIFORNIA GEOTECHNICAL, INC.

APPENDIX C
Laboratory Testing

Project Number 1-0602 Page C-1
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

LABORATORY TESTING
The following laboratory tests were performed on a representative sample in accordance with the applicable latest standards or methods from the ASTM, California Building Code (CBC) and California Department of Transportation.

Classification
Soils were classified with respect to the Unified Soil Classification System (USCS) in accordance with ASTM D-2487 and D-2488.

Particle Size Analysis
Modified hydrometer testing was conducted to aid in classification of the soil. The results of the particle size analysis are presented in Table C.

Maximum Density/Optimum Moisture
The maximum dry density and optimum moisture content of one representative bulk sample was evaluated in accordance with ASTM D-1557. The results are summarized in Table C.

Expansion Index Tests
One (1) expansion index tests were performed to evaluate the expansion potential of typical on-site soil. Testing was carried out in general conformance with ASTM Test Method D-4829.

The results are presented in Table C.

Chemical Analyses
Chemical testing was performed on one select samples by Alta. The results of these tests (sulfate content, resistivity, chloride content and pH) are presented on Table C.

B-1 5 Sandy Silt (Qyf) ML 92.0 24.8 2 32 45 21 25 MinResist:903 Ohmcm pH:7.1,Chl:775ppm,So4:0.02%
B-3 5 Sandy Silt (Qyf) ML 8 33 37 22 SEE PLATE
C-1
B-4 2 Silty Sand (Qyf) SM 25 44 16 15 pH:6.6,Chl:235ppm,So4:0.01%

OTHER TESTS

REMARKS

BORING DEPTH
(FEET)

SOIL DESCRIPTION GROUP
SYMBOL
DIRECT
SHEAR

EXPANSION
INDEX
UBC 18-2

MAXIMUM

DENSITY
(PCF)

TABLE C

SUMMARY OF LABORATORY TEST DATA
P.N. 1-0602

OPTIMUM

MOISTURE

CONTENT
(%)
CONSOL
SILT
(0.075mm-0.005mm)
(%)
SAND
(4.76mm-0.075mm)
(%)
PLUS NO.4 SEIVE
(plus 4.76mm)
(%)
CLAY
(minus 0.005mm)
(%)
Alta California Geotechnical, Inc.

-2.0
-1.0
0 1.0

2.0 3.0

4.0 5.0

6.0 7.0

8.0 0.1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 910
REMARKS: WATER ADDED AT 1.07 TSF

CONSOLIDATION CURVE PERCENT CHANGE IN HEIGHT
PLATE C-1

COMPRESSIVE STRESS IN TSF
group typical names density (pcf) symbolsieve (%)

17.5 moist. (%)
in situdry depth (ft.)

5.0B-3
satur. (%)
106
-200
ML Sandy Silt (Qyf)
boring in situ
83 59
Alta California Geotechnical, Inc.

P.N. 1-0602

ALTA CALIFORNIA GEOTECHNICAL, INC.

APPENDIX D
Maintenance and Improvement Considerations

Project Number 1-0602 Page D-1
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

MAINTENANCE AND IMPROVEMENT CONSIDERATIONS
General
Owners purchasing property must assume a certain degree of responsibility for improvements and for maintaining conditions around their home. Of primary importance from a geotechnical standpoint are maintaining drainage patterns and minimizing the soil moisture variation below all improvements. Such design, construction and owner maintenance provisions may include:
 Employing contractors for improvements who design and build in recognition of local building codes and specific site soils conditions.
 Establishing and maintaining positive drainage away from all foundations, walkways, driveways, patios, and other improvements.
 Avoiding the construction of planters adjacent to structural improvements.

Alternatively, planter sides/bottoms can be sealed with an impermeable membrane and drained away from the improvements via subdrains into approved disposal areas.  Sealing and maintaining construction/control joints within concrete slabs and walkways to reduce the potential for moisture infiltration into the subgrade soils.  Utilizing landscaping schemes with vegetation that requires minimal watering. Watering should be done in a uniform manner, as equally as possible on all sides of the foundation, keeping the soil "moist" but not allowing the soil to become saturated.  Maintaining positive drainage away from structures and providing roof gutters on all structures with downspouts that are designed to carry roof runoff directly into area drains or discharged well away from the foundation areas.  Avoiding the placement of trees closer to the proposed structures than a distance of one-half the mature height of the tree.
 Observation of the soil conditions around the perimeter of the structure during extremely hot/dry or unusually wet weather conditions so that modifications can be made in irrigation programs to maintain relatively uniform moisture conditions.

Project Number 1-0602 Page D-2
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.

Sulfates
Owners should be cautioned against the import and use of certain inorganic fertilizers, soil amendments, and/or other soils from offsite sources in the absence of specific information relating to their chemical composition. Some fertilizers have been known to leach sulfate compounds into soils and increase the sulfate concentrations to potentially detrimental levels.

Site Drainage
 The owners should be made aware of the potential problems that may develop when drainage is altered through construction of hardscape improvements. Ponded water, drainage over the slope face, leaking irrigation systems, overwatering, or other conditions which could lead to ground saturation must be avoided.  No water should be allowed to flow over the slopes. No alteration of pad gradients should be allowed that would prevent pad and roof runoff from being directed to approved disposal areas.
 Drainage patterns have been established at the time of the fine grading should be maintained throughout the life of the structure. No alterations to these drainage patterns should be made unless designed by qualified professionals in compliance with local code requirements and site-specific soils conditions.

Slope Drainage
 Residents should be made aware of the importance of maintaining and cleaning all interceptor ditches, drainage terraces, down drains, and any other drainage devices, which have been installed to promote slope stability.
 Subsurface drainage pipe outlets may protrude through slope surfaces and/or wall faces. These pipes, in conjunction with the graded features, are essential to slope and wall stability and must be protected in-place. They should not be altered or damaged in any way.

Planting and Irrigation of Slopes
 Seeding and planting of the slopes should be planned to achieve, as rapidly as possible, a well-established and deep-rooted vegetal cover requiring minimal watering.  It is the responsibility of the landscape architect to provide such plants initially and of the residents to maintain such planting. Alteration of such a planting scheme is at the resident's risk.
 The resident is responsible for proper irrigation and for maintenance and repair of properly installed irrigation systems. Leaks should be fixed immediately.

Project Number 1-0602 Page D-3
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.
 Sprinklers should be adjusted to provide maximum uniform coverage with a minimum of water usage and overlap. Overwatering with consequent wasteful runoff and serious ground saturation must be avoided.
 If automatic sprinkler systems are installed, their use must be adjusted to account for seasonal and natural rainfall conditions.

Burrowing Animals
 Residents must undertake a program to eliminate burrowing animals. This must be an ongoing program in order to promote slope stability.

Owner Improvement
Owner improvements (pools, spas, patio slabs, retaining walls, planters, etc.) should be designed to account for the terrain of the project, as well as expansive soil conditions and chemical characteristics. Design considerations on any given lot may need to include provisions for differential bearing materials, ascending/descending slope conditions, bedrock structure, perched (irrigation) water, special geologic surcharge loading conditions, expansive soil stresses, and long-term creep/settlement.

All owner improvements should be designed and constructed by qualified professionals utilizing appropriate design methodologies, which account for the on-site soils and geologic conditions.

Each lot and proposed improvement should be evaluated on an individual basis.

Setback Zones
Manufactured slopes maybe subject to long-term settlement and creep that can manifest itself in the form of both horizontal and vertical movement. These movements typically are produced as a result of weathering, erosion, gravity forces, and other natural phenomenon. A setback adjacent to slopes is required by most building codes, including the California Building Code. This zone is intended to locate and support the residential structures away from these slopes and onto soils that are not subject to the potential adverse effects of these natural phenomena.

The owner may wish to construct patios, walls, walkways, planters, swimming pools, spas, etc. within this zone. Such facilities may be sensitive to settlement and creep and should not be

Project Number 1-0602 Page D-4
May 16, 2025
ALTA CALIFORNIA GEOTECHNICAL, INC.
constructed within the setback zone unless properly engineered. It is suggested that plans for such improvements be designed by a professional engineer who is familiar with grading ordinances and design and construction requirements. In addition, we recommend that the designer and contractor familiarize themselves with the site specific geologic and geotechnical conditions on the specific lot.

ALTA CALIFORNIA GEOTECHNICAL, INC.

APPENDIX E
Earthwork Specifications

ALTA CALIFORNIA GEOTECHNICAL, INC.

APPENDIX F
Grading Details

PLN25-20102 – Eastvale 3 Project
City of Eastvale

APPENDIX E

PALEONTOLOGICAL RESOURCES

ASSESSMENT REPORT

PALEONTOLOGICAL RESOURCES ASSESSMENT REPORT
EASTVALE 3 PROJECT AT 7500 HELLMAN AVENUE
Assessor’s Parcel Numbers 144-070-016,-017, -018, and -020 City of Eastvale, San Bernardino County, California
For Submittal to:

City of Eastvale
Community Development Department, Planning Division
12363 Limonite Avenue, Suite 910
Eastvale, CA 91752
Prepared for:

Warmington Residential, Southern California Division
3090 Pullman Street
Costa Mesa, CA 92626
Prepared by:

Ron Schmidtling, Principal Paleontologist
Elizabeth Beckner, Report Writer

CRM TECH
1016 East Cooley Drive, Suite A/B
Colton, CA 92324
March 10, 2026
Approximately 3.22 acres
USGS Corona North, Calif., 7.5’ (1:24,000) quadrangle
T2S R7W, San Bernardino Baseline and Meridian (Rancho Jurupa land grant) CRM TECH Contract No. 4355P

i

EXECUTIVE SUMMARY
Between November 2025 and March 2026, at the request of Warmington Residential, Southern California Division, CRM TECH performed a paleontological resource assessment on 3.22 acres of vacant urban land in the City of Eastvale, Riverside County, California. The subject property of the study consists of Assessor’s Parcel Numbers 144-070-016, -017, -018, and -020, located at 7500 Hellman Avenue, north of Walter Street, in a portion of the Rancho Jurupa land grant lying within what would be Section 34 of Township 2 South, Range 7 West, San Bernardino Baseline and Meridian, as depicted in the United States Geological Survey Corona North, California,

7.5’ quadrangle.

The study is a part of the environmental review process for the proposed subdivision of the property for the development of 35 single-family homes. The City of Eastvale, as the lead agency for the project, required the study in compliance with the California Environmental Quality Act (CEQA). The purpose of the study is to provide the City with the necessary information and analysis to determine whether the proposed project would potentially disrupt or adversely affect any significant, nonrenewable paleontological resources, as mandated by CEQA.

In order to identify any paleontological resource localities that may exist in or near the project area and to assess the possibility for such resources to be encountered in future excavation and construction activities, CRM TECH requested records searches from the appropriate repositories, conducted a literature search, and carried out a systematic field survey in accordance with the guidelines of the Society of Vertebrate Paleontology. The results of these research procedures indicate that the extensively disturbed surface soils in the project area are low in paleontological sensitivity, but the subsurface sediments are considered to be high in paleontological sensitivity.

Based on these findings, CRM TECH recommends that a paleontological resource impact mitigation program be developed and implemented during the project to prevent project impact on significant, nonrenewable paleontological resources or reduce such impact to a level less than significant. As the primary component of the mitigation program, paleontological monitoring should be required during all earth-moving operations reaching beyond the depth of two feet. Under this condition, CRM TECH further recommends that the project may be cleared to proceed in compliance with CEQA provisions on paleontological resources.

ii

TABLE OF CONTENTS
EXECUTIVE SUMMARY ................................................................................................................... i INTRODUCTION ................................................................................................................................ 1 PALEONTOLOGICAL RESOURCES................................................................................................ 4 Definition .......................................................................................................................................... 4 Significance Criteria ......................................................................................................................... 4 Paleontological Sensitivity................................................................................................................ 5 SETTING.............................................................................................................................................. 6 METHODS AND PROCEDURES....................................................................................................... 7 Records Search.................................................................................................................................. 7 Literature Review.............................................................................................................................. 7 Field Survey...................................................................................................................................... 7 RESULTS AND FINDINGS................................................................................................................ 7 Records Search.................................................................................................................................. 7 Literature Review.............................................................................................................................. 8 Field Survey...................................................................................................................................... 8 CONCLUSION AND RECOMMENDATIONS ................................................................................. 8 REFERENCES ................................................................................................................................... 10 APPENDIX 1: Personnel Qualifications............................................................................................ 12 APPENDIX 2: Records Search Results.............................................................................................. 14

LIST OF FIGURES
Figure 1. Project vicinity....................................................................................................................... 1 Figure 2. Project area ............................................................................................................................ 2 Figure 3. Satellite image of the project area ......................................................................................... 3 Figure 4. Overview of the project area ................................................................................................. 6 Figure 5. Geologic map of the project area........................................................................................... 9

1 INTRODUCTION
Between November 2025 and March 2026, at the request of Warmington Residential, Southern California Division, CRM TECH performed a paleontological resource assessment on 3.22 acres of vacant urban land in the City of Eastvale, Riverside County, California (Figure 1). The subject property of the study consists of Assessor’s Parcel Numbers 144-070-016, -017, -018, and -020, located at 7500 Hellman Avenue, north of Walter Street, in a portion of the Rancho Jurupa land grant lying within what would be Section 34 of Township 2 South, Range 7 West, San Bernardino Baseline and Meridian, as depicted in the United States Geological Survey (USGS) Corona North, California, 7.5’ quadrangle (Figures 2, 3).

The study is a part of the environmental review process for the proposed subdivision of the property for the development of 35 single-family homes. The City of Eastvale, as the lead agency for the project, required the study in compliance with the California Environmental Quality Act (CEQA; PRC §21000 et seq.). The purpose of the study is to provide the City with the necessary information and analysis to determine whether the proposed project would potentially disrupt or adversely affect any significant, nonrenewable paleontological resources, as mandated by CEQA.

In order to identify any paleontological resource localities that may exist in or near the project area and to assess the possibility for such resources to be encountered in future excavation and construction activities, CRM TECH requested records searches from the appropriate repositories, conducted a literature search, and carried out a systematic field survey in accordance with the guidelines of the Society of Vertebrate Paleontology. The following report is a complete account of the methods, results, and final conclusion of the study. Personnel who participated in the study are named in the appropriate sections below, and their qualifications are provided in Appendix 1.

Figure 1. Project vicinity. Based on USGS San Bernardino and Santa Ana, Calif., 120’x60’ quadrangles, 1969/1979 edition.

2 Figure 2. Project area. Based on USGS Corona North and Prado Dam, Calif., 7.5’ quadrangles, 1981 edition.

3 Figure 3. Satellite image of the project area.Based on Google Earth imagery.

4 PALEONTOLOGICAL RESOURCES
The following section presents an overview of common paleontological resource types, along with criteria used in assessing resource significance and paleontological sensitivity.

DEFINITION
Paleontological resources represent the remains of prehistoric life, exclusive of any human remains, and include the localities where fossils were collected as well as the sedimentary rock formations in which they were found. The defining character of fossils or fossil deposits is their geologic age, typically older than recorded human history and/or older than the middle Holocene Epoch, which dates to circa 5,000 radiocarbon years (Society of Vertebrate Paleontology 2010:11).

Common fossil remains include marine and freshwater mollusk shells; the bones and teeth of fish, amphibians, reptiles, and mammals; leaf imprint assemblages; and petrified wood. Fossil traces, another type of paleontological resource, include internal and external molds (impressions) and casts created by these organisms. These items can serve as important guides to the age of the rocks and sediments in which they are contained and may prove useful in determining the temporal relationships between rock deposits from one area and those from another as well as the timing of geologic events. They can also provide information regarding evolutionary relationships, development trends, and environmental conditions.

Fossil resources generally occur only in areas of sedimentary rock (e.g., sandstone, siltstone, mudstone, claystone, or shale). Because of the infrequency of fossil preservation, fossils, particularly vertebrate fossils, are considered nonrenewable paleontological resources. Occasionally fossils may be exposed at the surface through the process of natural erosion or because of human disturbances; however, they generally lie buried beneath the surficial soils. Thus, the absence of fossils on the surface does not preclude the possibility of their being present within subsurface deposits, while the presence of fossils at the surface is often a good indication that more remains may be found in the subsurface.

SIGNIFICANCE CRITERIA
According to guidelines proposed by Eric Scott and Kathleen Springer (2003) of the San Bernardino County Museum, paleontological resources can be considered to be of significant scientific interest if they meet one or more of the following criteria:

1. The fossils provide information on the evolutionary relationships and developmental trends exhibited among organisms, living or extinct;

2. The fossils provide data useful in determining the age(s) of the rock unit or sedimentary stratum, including data important in determining the depositional history of the region and the timing of geologic events therein;

3. The fossils provide data regarding the development of biological communities or the interactions between paleobotanical and paleozoological biotas;

4. The fossils demonstrate unusual or spectacular circumstances in the history of life; and/or

5. The fossils are in short supply and/or in danger of being depleted or destroyed by the elements, vandalism, or commercial exploitation, and are not found in other geographic locations.

5 PALEONTOLOGICAL SENSITIVITY
The fossil record is unpredictable, and the preservation of organic remains is rare, requiring a particular sequence of events involving physical and biological factors. Skeletal tissue with a high percentage of mineral matter is the most readily preserved within the fossil record; soft tissues not intimately connected with the skeletal parts, however, are the least likely to be preserved (Raup and Stanley 1978). For this reason, the fossil record contains a biased selection not only of the types of organisms preserved but also of certain parts of the organisms themselves. As a consequence, paleontologists are unable to know with certainty, the quantity of fossils or the quality of their preservation that might be present within any given geologic unit.

Sedimentary units that are paleontologically sensitive are those geologic units (mappable rock formations) with a high potential to contain significant nonrenewable paleontological resources.

More specifically, these are geologic units within which vertebrate fossils or significant invertebrate fossils have been determined by previous studies to be present or are likely to be present. These units include, but are not limited to, sedimentary formations that contain significant paleontological resources anywhere within their geographical extent as well as sedimentary rock units temporally or lithologically amenable to the preservation of fossils.

A geologic formation is defined as a stratigraphic unit identified by its lithic characteristics (e.g., grain size, texture, color, and mineral content) and stratigraphic position. There is a direct relationship between fossils and the geologic formations within which they are enclosed and, with sufficient knowledge of the geology and stratigraphy of a particular area, it is possible for paleontologists to reasonably determine the formation’s potential to contain significant nonrenewable vertebrate, invertebrate, marine, or plant fossil remains.

The paleontological sensitivity for a geologic formation is determined by the potential for that formation to produce significant nonrenewable fossils. This determination is based on what fossil resources the particular geologic formation has produced in the past at other nearby locations.

Determinations of paleontologic sensitivity must consider not only the potential for yielding vertebrate fossils but also the potential of yielding a few significant fossils that may provide new and significant taxonomic, phylogenetic, and/or stratigraphic data.

The Society of Vertebrate Paleontology issued a set of standard guidelines intended to assist paleontologists to assess and mitigate any adverse effects/impacts to nonrenewable paleontological resources. The guidelines defined four categories of paleontological sensitivity for geologic units that might be impacted by a proposed project, as listed below (Society of Vertebrate Paleontology 2010:1-2):
• High Potential: Rock units from which vertebrate or significant invertebrate, plant, or trace fossils have been recovered.
• Undetermined Potential: Rock units for which little information is available concerning their paleontological content, geologic age, and depositional environment. • Low Potential: Rock units that are poorly represented by fossil specimens in institutional collections, or based on general scientific consensus only preserve fossils in rare circumstances. • No Potential: Rock units that have no potential to contain significant paleontological resources, such as high-grade metamorphic rocks and plutonic igneous rocks.

6 SETTING
The proposed project is located in the northern portion of the Peninsular Ranges province, which is bounded on the north by the Transverse Ranges province, on the northeast by the Colorado Desert province, and on the west by the Pacific Ocean (Jenkins 1980:40-41; Harms 1996:150). More specifically, the project area lies within the Santa Ana River Valley portion of the Peninsular Ranges province, a structurally depressed trough filled with sediments of Miocene through Recent age (Clarke 1978-1979:15).

The Santa Ana River Valley is one of the many tectonically controlled valleys within the valley-andridge systems found in the Perris Block. Defined by English (1926) as a region between the San Jacinto and Elsinore-Chino fault zones, the Perris Block is bounded on the north by the Cucamonga (San Gabriel) Fault and on the south by a vaguely delineated boundary near the southern end of the Temecula Valley. This structural block is considered to have been active since Pliocene time (Woodford et al. 1971:3421). The Pliocene- and Pleistocene-age non-marine sedimentary rocks filling the valley areas have produced a few vertebrate fossils, as well as a few invertebrate fossil remains (Mann 1955:13).

The L-shaped project area is situated on the western edge of the Eastvale city limits, wrapping around the northern and eastern sides of a formerly rural residential property at the northeastern corner of Hellman Avenue and Walters Street. It is surrounded by suburban residential neighborhoods on the west, north, and east, with the Rondo Elementary School of Discovery across Walters Street to the south. Elevations within the project boundaries range approximately from 573 feet to 582 feet above mean sea level, and the terrain is relatively level with a slight incline towards the north. Vegetation observed on the property includes grasses throughout, with large California pepper trees in the center of the project area. Also present on the property are several debris mounds with various types of domestic refuse (Figure 4).

Figure 4. Overview of the project area, view to the north. (Photograph taken on December 17, 2025)

7 METHODS AND PROCEDURES

RECORDS SEARCH
On December 3, 2025, CRM TECH requested paleontological records searches on this property from the San Bernardino County Museum (SBCM) in Redlands and the Western Science Center (WSC) in Hemet. These institutions maintain files of regional paleontological localities as well as supporting maps and documents. The records search results are used to identify known previously performed paleontological resource assessments as well as known paleontological localities within a one-mile radius of the project area. The SBCM provided the records search results in a letter dated January 9, 2026, but the WSC was unable to process the records search request in time. A copy of the records search results from the SBCM is attached to this report in Appendix 2.

LITERATURE REVIEW
In conjunction with the records searches, CRM TECH report writer Elizabeth Beckner reviewed geological literature pertaining to the project vicinity under the direction of principal paleontologist Ron C. Schmidtling. Sources consulted during this part of the research include primarily topographic, geologic, and soil maps and historical aerial/satellite photographs of the surrounding region, published geologic literature pertaining to the project location, and other materials in the CRM TECH library, including unpublished reports produced during similar surveys on nearby properties.

FIELD SURVEY
On December 17, 2025, CRM TECH paleontological surveyor Melissa Portilla carried out the field survey of the project area under Ron Schmidtling’s direction. The survey was completed by walking a series of parallel east-west transects spaced 15 meters (approximately 50 feet) apart. In this way, the ground surface in the entire project area was systematically and carefully examined to determine the soil types, to verify the geological formations, and to look for any indications of paleontological remains. Visibility of the native soils was poor (0-5%) in most of the project area because the ground was obscured by dense vegetation. In the areas with some exposed soils, mainly underneath the trees, visibility was fair (5-10%), although much of the ground was covered in a layer of dead vegetation. Considering the history of past disturbances to the ground surface within the project area, the level of visibility was deemed to be acceptable for the purpose of this study.

RESULTS AND FINDINGS

RECORDS SEARCH
The paleontological resources records search by the SBCM identified no known vertebrate paleontological localities within the project area. However, the SBCM reported four fossil localities that produced fossils of Bison sp. and Camelidae less than half a mile northeast of the project location (Kottkamp 2026; see Appendix 2). According to the SBCM, all four localities are assigned to Qoa, or “fluvial, mottled, brown-green silty clay or green-brown clayed sand,” while the surface sediments within the majority of the project area consist of Qyfa, or “young alluvial fan deposits of

8 early Holocene and late Pleistocene age (ibid.). Older alluvial deposits occur nearby and may underlie the Qyfa surface sediments found within the project area (ibid.). The SBCM did not offer recommendations regarding the proposed project but noted that “Pleistocene age sediments commonly underlie surface deposits by 5 feet or less in northwestern Riverside County and are often fossiliferous” (ibid.).

LITERATURE REVIEW
Rogers (1965) maps the surface geology at the project location Qal (alluvium of Recent age). Knecht (1971:Map Sheet 22) maps the surface soil within the project area as Ce (Chino silt loam, drained).

Morton and Gray (2002) map the surface geology as Qyfa, described as young alluvial fan deposits from the Holocene and late Pleistocene that are “gray-hued sand and cobble- and gravel-sand deposits derived from lithic diverse sedimentary units” (Figure 5). Morton and Miller (2006) map the surface geology in the project area as Qyf3a, young alluvial-fan deposits from Unit 3 that date to the middle Holocene and is defined as “slightly to moderately consolidated silt, sand, and coarsegrained sand to bouldery alluvial-fan deposits having slightly to moderately dissected surfaces.” Historical aerial and satellite photographs indicate that land use in the project vicinity was dominated by agriculture, with cultivated fields and orchards occupying most of the land, until the post-WWII era (NETR 1938-1980). The project area evidently remains undeveloped until 1980, when the southeastern portion of the property was graded and a metal holding pen was constructed along Walters Street (NETR 1980). By 1985, the majority of the project area had been graded (NETR 1985). A building was constructed on the property during the 1990s but was removed in recent years, while the rest of the land was used for the storage of large trucks and shipping containers (NETR 1994-2022; Google Earth 2023-2025).

FIELD SURVEY
The field survey yielded negative findings for potential paleontological resources, and no surficial indications of any fossil remains were observed within or adjacent to the project area. Field observations confirmed that the ground surface in the project area has been extensively disturbed by past development since the 1980s. Today, it is littered with piles of debris and refuse, with some remnants of the development still present, such as the holding pen, a ramp, an asphalt drive, and a concrete walkway.

CONCLUSION AND RECOMMENDATIONS
CEQA guidelines (Title 14 CCR App. G, Sec. V(c)) require that public agencies in the State of California determine whether a proposed project would “directly or indirectly destroy a unique paleontological resource” during the environmental review process. The present study, conducted in compliance with this provision, is designed to identify any significant, nonrenewable paleontological resources that may exist within or adjacent to the project area and to assess the possibility for such resources to be encountered in future excavation and construction activities.

In summary of the research results outlined above, the surface sediments in the project area are relatively recent in age and have been extensively disturbed over the past few decades. Therefore,

9 Figure 5. Geologic map of the project area. Based on Morton and Gray 2002 and Dibblee 2001.

10 they are considered to be low in potential for significant nonrenewable paleontological resources.

However, the surface sediments likely overlie older alluvial deposits of Pleistocene age, which are high in paleontological sensitivity. While no vertebrate fossil localities have been identified in the immediate vicinity of the project area, fossil remains have been recovered nearby from the alluvium and rock sequences that also occur subsurface in and around the project area.

Based on these findings, CRM TECH recommends that a paleontological resource impact mitigation program be developed and implemented during the project to prevent project impact on significant, nonrenewable paleontological resources or reduce such impact to a level less than significant. As the primary component of the mitigation program, paleontological monitoring should be required during all earth-moving operations in sediments identified as likely to contain fossil remains. The mitigation program should be developed in accordance with the provisions of CEQA as well as the proposed guidelines of the Society of Vertebrate Paleontology (2010), and should include but not be limited to the following components:
• Earth-moving operations reaching beyond the depth of two feet should be monitored by a qualified paleontological monitor. The monitor should be prepared to quickly salvage fossils as they are unearthed to avoid construction delays and should collect samples of sediments that are likely to contain fossil remains of small vertebrates or in vertebrates. However, the monitor must have the power to temporarily halt or divert grading equipment to allow for the removal of abundant or large specimens.
• Collected samples of sediment should be processed to recover small fossils, and all recovered specimens should be identified and curated at a repository with permanent retrievable storage. • A report of findings, including an itemized inventory of recovered specimens, should be prepared upon completion of the procedures outlined above. The report should include a discussion of the significance of the paleontological findings, if any. The report and the inventory, when submitted to the City of Eastvale, would signify completion of the program to mitigate potential impacts on paleontological resources.

REFERENCES
Clarke, Anthony Orr
1978-1979 Quaternary Evolution of the San Bernardino Valley. Quarterly of the San Bernardino County Museum Association XXVI(2/3), Winter 1978/Spring 1979.

Dibblee, Thomas W., Jr.
2001 Geologic Map of the Yorba Linda and Prado Dam Quadrangles (Eastern Puente Hills), Los Angeles, Orange, San Bernardino, and Riverside Counties, California. Dibblee Geological Foundation Map #75. Santa Barbara, California.

English, W.A.
1926 Geology and Oil Resources of the Puente Hills Region, Southern California. U.S.

Geological Survey Bulletin 146. Washington, D.C.

Google Earth
2023-2025 Aerial/satellite photographs of the project vicinity. Available through Google Earth software.

11 Harms, Nancy S.
1996 A Precollegiate Teachers Guide to California Geomorphic/Physiographic Provinces.

National Association of Geoscience Teachers, Far West Section, Concord, California.

Jenkins, Olaf P.
1980 Geomorphic Provinces Map of California. California Geology 32(2):40-41. California Division of Mines and Geology, Sacramento.

Knecht, Arnold A.
1971 Soil Survey of Western Riverside Area, California. U.S. Department of Agriculture, Soil Conservation Service, Washington, D.C.

Kottkamp, Scott
2026 Paleontology Records Review, Proposed Site of Proposed Eastvale 3 Project (CRM TECH Contract No. 4355P). Prepared by the San Bernardino County Museum, Division of Earth Sciences, Redlands, California.

Mann, John F., Jr.
1955 Geology of a Portion of the Elsinore Fault Zone, California. California Division of Mines Special Report 43. San Francisco.

McLeod, Samuel A.
2007 Paleontological Resources for the Proposed Eastvale Site Project, CRM TECH No. 3199P, in the City of Eastvale, Riverside County. Prepared by the Natural History Museum of Los Angeles County, Vertebrate Paleontology Section, Los Angeles.

Morton, Douglas M., and C.H. Gray
2002 Geologic Map of the Corona North 7.5’ Quadrangle, Riverside and San Bernardino Counties, California; Version 1.0. United States Geologic Survey Open-File Report 2002-22.

Digital Preparation by K. R. Bovard and M. Dawson.

Morton, Douglas M., and F.K. Miller
2006 Geologic Map of the San Bernardino and Santa Ana 30’x60’ Quadrangle, California.

U.S. Geological Survey Open-File Report 2006-1217.

NETR (Nationwide Environmental Title Research Online)
1938-2022 Aerial/satellite photographs of the project vicinity; taken in 1938, 1948, 1959, 1966, 1967, 1980, 1985, 1994, 1998, 1999, 2002, 2005, 2009, 2010, 2012, 2014, 2016, 2018, 2020, and 2022. http://www.historicaerials.com.

Raup, David M., and Steven M. Stanley
1978 Principles of Paleontology. W.H. Freeman and Company, San Francisco.

Rogers, Thomas H.
1965 Geological Map of California, Santa Ana Sheet (1:250,000). California Division of Mines and Geology, Sacramento, California.

Scott, Eric, and Kathleen B. Springer
2003 CEQA and Fossil Preservation in California. Environmental Monitor Fall:4-10.

Association of Environmental Professionals, Sacramento, California.

Society of Vertebrate Paleontology
2010 Standard Procedures for the Assessment and Mitigation of Adverse Impacts to Paleontological Resources. http//:vertpaleo.org/Membership/Member-Resources/SVP_Impact_ Mitigation_Guidelines.aspx.

Woodford, Alfred O., John S. Shelton, Donald O. Doehring, and Richard K. Morton 1971 Pliocene-Pleistocene History of the Perris Block, Southern California. Geological Society of America Bulletin 82(12):3421-3448.

12 APPENDIX 1:

PERSONNEL QUALIFICATIONS

PRINCIPAL PALEONTOLOGIST
Ron Schmidtling, M.S.

Education
1995 M.S., Geology, University of California, Los Angeles. 1991 Pasadena City College, Pasadena, California.
1985 B.A., Archaeology, Paleontology, Ancient Folklore, and Art History, University of Southern Mississippi, Hattiesburg.

Professional Experience:
2020- Principal Paleontologist, CRM TECH, Colton, California. 2014- Instructor of Earth Science, History of Life, Ecology, and Evolutionary Biology, Columbia College Hollywood, Reseda, California.
2013, 2015 Volunteer, excavation of a camarasaur and a diplodocid in southern Utah, Natural History Museum of Los Angeles County, California.
1993-2014 Consultant, Getty Conservation Institute, Brentwood, California. • Geological Consultant on the Renaissance Bronze Project, characterizing constituents of bronze core material;
• Paleontological Consultant for Antiquities/Conservation, identifying the foraminifera and mineral constituents of a limestone torso of Aphrodite; • Scientific Consultant on the Brentwood Site Building Project, testing building materials for their suitability in the museum galleries. 1999-2001 Archaeological and Paleontological Monitor, Michael Brandman Associates, Irvine, California.
1997 Department of Archaeology, University of California, Los Angeles. 1994 Scientific Illustrator and Teaching Assistant, Department of Earth and Space Sciences and Department of Biological Sciences, University of California, Los Angeles.

Memberships
AAPS (Association of Applied Paleontological Sciences), USA; CSEOL (Center for the Study of Evolution and the Origin of Life), Department of Earth Sciences, University of California, Los Angeles.

Publications and Reports
Author, co-author, and contributor on numerous paleontological publications and paleontological resource management reports.

13 REPORT WRITER
Elizabeth L. Beckner, Ph.D.

Education
2024 Ph.D., Anthropology, University of California, Riverside. 2017 M.A., Anthropology, University of California, Riverside. 2016 B.A., Anthropology, University of California, Riverside. 2014 A.A., Anthropology, Chaffey College, Rancho Cucamonga, California.

Professional Experience
2025- Project Archaeologist/Report Writer, CRM TECH, Colton, California. 2025 Lecturer, California State University, San Bernardino. 2019- Adjunct Instructor, Chaffey College, Rancho Cucamonga, California. 2019 Archaeologist, Dudek, Pasadena, California
2017-2019 Teaching Assistant, University of California, Riverside. 2018 Archaeologist, Proyecto Sacbé Cobá-Yaxuna (Sacbé Cobá-Yaxuna Project), Cobá, Quintana Roo, Mexico.
2016-2017 Field Assistant, Proyecto de Interacción Política del Centro de Yucatán (Political Interaction Project of Central Yucatan), Yaxuna, Yucatan, Mexico. 2015-2017 Information Officer, Eastern Information Center, Riverside, California.

PALEONTOLOGICAL SURVEYOR
Melissa A. Portilla, B.A.

Education
2023 A.A. (cum laude), Anthropology, Fullerton College. 2019 B.A., Ancient History: Classics, University of Hawaii, Manoa. • Cross-trained in paleontological field procedures and identifications by CRM TECH Principal Geologist/Paleontologist Ron Schmidtling.

Professional Experience
2023- Project Archaeologist/Paleontological Surveyor, CRM TECH, Colton, California. 2023-2024 Project Archaeologist, Psomas, Pasadena, California. 2020 Collections Assistant, Museum of Us, San Diego, California.

14 APPENDIX 2

RECORDS SEARCH RESULTS

15

16

PLN25-20102 – Eastvale 3 Project
City of Eastvale

APPENDIX F

PHASE I ESA

7500 Hellman Avenue
Eastvale, California 92880
Phase I Environmental Site
Assessment
May 1, 2025
Prepared for:

Warmington Residential
3090 Pullman Street
Costa Mesa, California 92626
Prepared by:

Stantec Consulting Services Inc.
735 East Carnegie Drive, Suite 280
San Bernardino, California 92408
Project No.: 185806936

Sign-off Sheet and Signatures of Environmental Professionals Project No.: 185806936
This document entitled Phase I Environmental Site Assessment (Report) was prepared by Stantec Consulting Services Inc. (“Stantec”) for the account of Warmington Residential (the “Client”). The conclusions in the Report are Stantec’s professional opinion, as of the time of the Report, and concerning the scope described in the Report. The opinions in the document are based on conditions and information existing at the time the scope of work was conducted and do not take into account any subsequent changes. The Report relates solely to the specific project for which Stantec was retained and the stated purpose for which the Report was prepared. The Report is not to be used or relied on for any variation or extension of the project, or for any other project or purpose, and any unauthorized use or reliance is at the recipient’s own risk.

Stantec has assumed all information received from the “Client” and third parties in the preparation of the Report to be correct. While Stantec has exercised a customary level of judgment or due diligence in the use of such information, Stantec assumes no responsibility for the consequences of any error or omission contained therein.

This Report is intended solely for use by the Client in accordance with Stantec’s contract with the Client.

While the Report may be provided to applicable authorities having jurisdiction and others for whom the Client is responsible, Stantec does not warrant the services to any third party. The report may not be relied upon by any other party without the express written consent of Stantec, which may be withheld at Stantec’s discretion.

I declare that, to the best of my professional knowledge and belief, I meet the definition of Environmental Professional as defined in § 312.10 of Title 40 of the Code of Federal Regulations, Part 312, (40 CFR 312). I have the specific qualifications based on education, training, and experience to assess a property of the nature, history, and setting of the property. I have developed and performed all the appropriate inquiries in conformance with the standards and practices set forth in 40 CFR Part 312.

Author:

Jennifer Alvarado
Associate Scientist
Quality Reviewer:

Alicia Jansen
Senior Scientist
Independent Reviewer:

Kyle D. Emerson, C.E.G.

Managing Principal

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Project No.: 185806936 i
Table of Contents
ABBREVIATIONS .....................................................................................................................III

1.0 EXECUTIVE SUMMARY..............................................................................................1.1

2.0 INTRODUCTION..........................................................................................................2.1

2.1 SUBJECT PROPERTY DESCRIPTION .......................................................................2.2

2.2 SPECIAL TERMS, CONDITIONS, AND ADDITIONAL ASSUMPTIONS ......................2.2

2.3 EXCEPTIONS AND LIMITING CONDITIONS ..............................................................2.3

2.4 PERSONNEL QUALIFICATIONS.................................................................................2.4

3.0 USER-PROVIDED INFORMATION..............................................................................3.1

4.0 RECORDS REVIEW ....................................................................................................4.1

4.1 PHYSICAL SETTING ...................................................................................................4.1

4.1.1 Subject Property Topography and Surface Water Flow...............................4.1

4.1.2 Regional and Subject Property Geology......................................................4.2

4.1.3 Regional and Subject Property Hydrogeology .............................................4.2

4.2 FEDERAL, STATE AND TRIBAL ENVIRONMENTAL RECORDS................................4.2

4.2.1 Listings for Subject Property........................................................................4.2

4.2.2 Listings for Adjoining and Nearby Sites with Potential to Impact Subject Property..........................................................................................4.3

4.3 LOCAL/REGIONAL ENVIRONMENTAL RECORDS ....................................................4.3

4.3.1 Environmental Health Department...............................................................4.4

4.3.2 Fire Department ..........................................................................................4.4

4.3.3 City and County Department Records.........................................................4.4

4.3.4 State Department Records..........................................................................4.5

4.4 HISTORICAL RECORDS REVIEW ..............................................................................4.6

4.4.1 Land Title Records/Deeds...........................................................................4.6

4.4.2 Aerial Photographs......................................................................................4.6

4.4.3 City Directories............................................................................................4.7

4.4.4 Historical Fire Insurance Maps....................................................................4.7

4.4.5 Historical Topographic Maps.......................................................................4.7

4.4.6 Other Historical Sources .............................................................................4.8

5.0 SITE RECONNAISSANCE...........................................................................................5.1

5.1 SITE RECONNAISSANCE METHODOLOGY ..............................................................5.1

5.2 GENERAL DESCRIPTION...........................................................................................5.1

5.3 HAZARDOUS SUBSTANCES AND PETROLEUM PRODUCTS..................................5.2

5.4 INTERIOR OBSERVATIONS .......................................................................................5.2

5.5 EXTERIOR OBSERVATIONS......................................................................................5.2

5.6 UNDERGROUND STORAGE TANKS/STRUCTURES.................................................5.3

5.7 ABOVEGROUND STORAGE TANKS..........................................................................5.3

5.8 ADJOINING PROPERTIES..........................................................................................5.3

5.8.1 Current Uses of Adjoining Properties ..........................................................5.3

5.8.2 Observed Evidence of Past Uses of Adjoining Properties ...........................5.4

5.8.3 Pits, Ponds, or Lagoons on Adjoining Properties.........................................5.4

5.9 OBSERVED PHYSICAL SETTING...............................................................................5.4

6.0 EVALUATION..............................................................................................................6.1

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Project No.: 185806936 ii

6.1 FINDINGS AND OPINIONS .........................................................................................6.1

6.2 DATA GAPS.................................................................................................................6.1

6.3 CONCLUSIONS...........................................................................................................6.2

7.0 NON-SCOPE CONSIDERATIONS...............................................................................7.1

7.1 LEAD-BASED PAINT ...................................................................................................7.1

7.2 ASBESTOS..................................................................................................................7.1

7.3 RADON ........................................................................................................................7.1

7.4 FLOOD ZONES............................................................................................................7.2

8.0 REFERENCES.............................................................................................................8.1

LIST OF FIGURES
FIGURE 1 Subject Property and Vicinity Map
FIGURE 2 Subject Property Map

LIST OF APPENDICES
APPENDIX A PHOTOGRAPHS OF THE PROPERTY AND VICINITY..................................... A APPENDIX B STANTEC RESUMES......................................................................................... B APPENDIX C USER PROVIDED RECORDS............................................................................ C APPENDIX D ENVIRONMENTAL AGENCY DATABASE SEARCH REPORT ......................... E APPENDIX E HISTORICAL RECORDS.................................................................................... F APPENDIX F AGENCY RECORDS........................................................................................... F

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Project No.: 185806936 iii
Abbreviations
AAI All Appropriate Inquiries
AP Alquist-Priolo
APN Assessor’s Parcel Number
AST Aboveground Storage Tank
ASTM ASTM International
AUL Activity Use Limitation
BER Business Environmental Risk
Bgs Below Ground Surface
CERCLA Comprehensive Environmental Response, Compensation, and Liability Act CFR Code of Federal Regulation
CREC Controlled Recognized Environmental Conditions
EP Environmental Professional
EPA Environmental Protection Agency
ESA Environmental Site Assessment
DTSC Department of Toxic Substances Control
ft amsl Feet above mean sea level
HREC Historical Recognized Environmental Conditions
LUST Leaking Underground Storage Tank
PCBs Polychlorinated Biphenyls
RCRA Resource Conservation and Recovery Act
REC Recognized Environmental Conditions
SVOC Semi-Volatile Organic Compounds
USDA-NRCS United States Department of Agriculture-Natural Resources Conservation Service
USGS United States Geological Survey
UST Underground Storage Tank
VEC Vapor Encroachment Condition
VES Vapor Encroachment Screen
VOCs Volatile Organic Compounds

PHASE I ENVIRONMENTAL SITE ASSESSMENT
ExecutIve Summary
May 1, 2025
Project No.: 185806936 1.1

1.0 EXECUTIVE SUMMARY
Stantec Consulting Services Inc. (Stantec) has completed a Phase I Environmental Site Assessment (ESA) report of the property associated with Assessor’s Parcel Numbers (APNs) 144-070-016; 144-070- 017; 144-070-018; and 144-070-020, located at 7500 Hellman Avenue, northeast of the intersection of Hellman Avenue and Walters Street, Eastvale, Riverside County, California 92880 (the “Subject Property”), on behalf of Warmington Residential (the “Client”). The work was performed according to Stantec’s proposal and terms and conditions dated April 7, 2025. Warmington Residential (the “User”) has been designated as the User of this report. The intended use of this Phase I ESA is for due diligence in support of potential redevelopment.

The Phase I ESA was conducted in conformance with the requirements of ASTM International (ASTM) Designation E1527-21, and All Appropriate Inquiries (AAI) as defined by the United States Environmental Protection Agency (EPA) in Title 40 of the Code of Federal Regulations, Part 312 (40 CFR 312), except as may have been modified by the scope of work, and terms and conditions, requested by the Client. Any exceptions to, or deletions from, the ASTM or AAI practice are described in Section 2.3.

The Subject Property consists of approximately 3.2 acres of land associated with APNs 144-070-016; 144-070-017; 144-070-018; and 144-070-020, located at 7500 Hellman Avenue, northeast of the intersection of Hellman Avenue and Walters Street, Eastvale, Riverside County, California 92880. The Subject Property is currently vacant land. Adjoining properties, as well as the nearby area, include a concrete drainage channel to the north followed by residential structures; residential structures to the east and west; and an elementary school to the south. A Subject Property Location Map is provided as Figure

1. A Subject Property Vicinity Map illustrating the main features of the Subject Property and vicinity is provided as Figure 2. Photographs taken during the site reconnaissance visit are provided in Appendix A.

Based on review of historical sources including aerial photographs and city directory listings, the Subject Property was formerly utilized for livestock holding and a storage area of the trucks and trailers used in the transportation of livestock. During the site reconnaissance, a former cattle pen was observed in the southern portion of the Subject Property along Walters Avenue. Based on the historic aerial photographs and public record the property does not appear to have been used as a dairy or for any holding of cows and no signs of significant quantities of animal waste was observed. However, debris piles with various household debris, used tires, and building demolition waste were also observed in the center of the Subject Property.

As discussed in the following text in section 4.2.2 Rondo Elementary School south-southwest of the subject Property was a former dairy. An assessment of that property did not identify methane related to the former dairy’s operations. The Department of Toxic Substances Control (DTSC) oversaw the assessment of that property and determined that no issues exist to affect the development of the property into a school. There does not appear that any neighboring properties or the history of the subject Site would draw concern for the presence of methane that would affect the residential development of this Property.

Additionally, during the site reconnaissance, an irrigation well was observed in the northern portion of the Subject Property. The presence of an irrigation well is not considered an environmental concern to the

PHASE I ENVIRONMENTAL SITE ASSESSMENT
ExecutIve Summary
May 1, 2025
Project No.: 185806936 1.2
Subject Property, however, if the well is not going to be used in the future it should be decommissioned in accordance with applicable regulatory requirements before grading activities occur.

We have performed a Phase I ESA in conformance with the scope and limitations of ASTM Practice E1527-21 of the Subject Property. Any exceptions to, or deletions from, this practice are described Section 2.3 of this report. This assessment has revealed no recognized environmental conditions (RECs), Controlled RECs (CRECs), or significant data gaps in connection with the Subject Property. No further investigation appears to be warranted at this time.

This assessment has revealed the following items of note in connection with the Subject Property:
• Debris piles with various household debris, used tires, and building demolition waste were also observed in the center of the Subject Property. The discarded building materials should be tested for the presence of asbestos-containing materials (ACMs) before off-site disposal in accordance with applicable federal and local regulations. • Additionally, during the site reconnaissance, an irrigation well was observed in the northern portion of the Subject Property. The presence of an irrigation well is not considered an environmental concern to the Subject Property, however, if the well is not going to be used in the future it should be decommissioned in accordance with applicable regulatory requirements before grading activities occur.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Introduction
May 1, 2025
Project No.: 185806936 2.1

2.0 INTRODUCTION
The objective of this Phase I ESA was to perform AAI into the past ownership and uses of the Subject Property consistent with good commercial or customary practice as outlined by ASTM International (ASTM) in “Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process,” Designation E1527-21. “All Appropriate Inquiries” is the process for evaluating a property’s environmental conditions for the purpose of qualifying for landowner liability protections under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) following final rule of Part 312 of Title 40, Code of Federal Regulations (40 CFR Part 312). The purpose of this Phase I ESA was to identify, to the extent feasible, adverse environmental conditions including recognized environmental conditions (“RECs”) of the Subject Property.

The ASTM E1527-21 standard indicates that the goal of the Phase I ESA is to identify RECs, as well as historical recognized environmental conditions (“HRECs”) and controlled recognized environmental conditions (“CRECs”) that may exist at a property. The term “recognized environmental conditions” is defined as:
1) the presence of 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 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.

ASTM defines a “HREC” as a previous release of hazardous substances or petroleum products affecting the Subject Property that has been addressed to the satisfaction of the applicable regulatory authority and meets current unrestricted use criteria established by a regulatory authority, without subjecting the property to any required controls (e.g., activity and use limitations or other property use limitations). A HREC is not considered a REC.

ASTM defines a “CREC” as a REC resulting from a past release of hazardous substances or petroleum products that has been addressed to the satisfaction of the applicable regulatory authority (e.g., as evidenced by the issuance of a no further action letter or equivalent, or meeting risk-based criteria established by regulatory authority), but with hazardous substances or petroleum products allowed to remain in place subject to the implementation of required controls (e.g., activity and use limitations, institutional controls, or engineering controls).

As defined by ASTM, RECs can include hazardous substances or petroleum products present under conditions in compliance with laws if that presence represents a material threat of future release. The release of hazardous substances or petroleum products is, however, not a REC if that presence is a de minimis condition. De minimis conditions are minor releases that generally do not present a material risk to human health and would not likely be subject to enforcement action if brought to the attention of governmental agencies. ASTM also considers the potential for a business environmental risk (BER),

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Introduction
May 1, 2025
Project No.: 185806936 2.2
defined as a risk which can have a material environmental or environmentally driven impact on the business associated with the current or planned use of the Subject Property, not necessarily limited to those environmental issues required to be investigated by the ASTM standard. Consideration of BERs may involve addressing one or more ASTM non-scope considerations.

This Phase I ESA was conducted in accordance with our proposal to Warmington Residential dated April 7, 2025. The scope of work conducted during this Phase I ESA consisted of a visual reconnaissance of the Subject Property, interviews with key individuals, and review of reasonably ascertainable documents.

The scope of work did not include an assessment for environmental regulatory compliance of any facility ever operated at the Subject Property (past or present), or sampling and analyzing of environmental media. Stantec was not contracted to perform an independent evaluation of the purchase or lease price of the Subject Property and its relationship to current fair market value. The conclusions presented in this Phase I ESA report are professional opinions based on data described herein. The opinions are subject to the limitations described in Section 2.3.

ASTM E1527-21 notes that the availability of record information varies from source to source. The User or Environmental Professional (EP) is not obligated to identify, obtain, or review every possible source that might exist with respect to a property. Instead, ASTM identifies record information that is reasonably ascertainable from standard sources. “Reasonably ascertainable” means:

1. Information that is publicly available;

2. Information that is obtainable from its source within reasonable time and cost constraints; and

3. Information that is practicably reviewable.

2.1 SUBJECT PROPERTY DESCRIPTION
The Subject Property consists of approximately 3.2 acres of land associated with APNs 144-070-016; 144-070-017; 144-070-018; and 144-070-020, located at 7500 Hellman Avenue, northeast of the intersection of Hellman Avenue and Walters Street, Eastvale, Riverside County, California 92880. The Subject Property is currently vacant land. Adjoining properties, as well as the nearby area, include a concrete drainage channel to the north followed by residential structures; residential structures to the east and west; and an elementary school to the south. A Subject Property Location Map is provided as Figure

1. A Subject Property Vicinity Map illustrating the main features of the Subject Property and vicinity is provided as Figure 2. Photographs taken during the site reconnaissance visit are provided in Appendix A.

The Subject Property Owner is identified as Eastvale Ventures Inc.

2.2 SPECIAL TERMS, CONDITIONS, AND ADDITIONAL

ASSUMPTIONS
There were no special terms, conditions, or additional assumptions associated with this Phase I ESA.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Introduction
May 1, 2025
Project No.: 185806936 2.3

2.3 EXCEPTIONS AND LIMITING CONDITIONS
This report documents work that was performed in accordance with generally accepted professional standards at the time and location in which the services were provided and given the schedule and budget constraints established by the client. No other representations, warranties, or guarantees are made concerning the accuracy or completeness of the data or conclusions contained within this report, including no assurance that this work has uncovered all potential and actual liabilities and conditions associated with the Subject Property.

This report provides an evaluation of selected environmental conditions associated with the Subject Property that was assessed at the time the work was conducted and is based on information obtained by and/or provided to Stantec at that time. There are no assurances regarding the accuracy and completeness of this information received from others.

Conclusions made within this report consist of Stantec’s professional opinion as of the time of the writing of this report and are based solely on the scope of work described in the report, the limited data available, and the results of the work. They are not a certification of the Subject Property’s environmental condition.

Stantec did not obtain historical records that document the property history in 5-year intervals, and this resulted in data gaps. Although this represents data gaps, these data gaps are not considered to impact the EPs ability to identify RECs unless stated as such. Based on the information obtained during the course of this ESA and general knowledge of development at and near the Subject Property, the absence of this information did not affect the ability of the EPs to identify RECs, HRECs, CRECs, or de minimis conditions.

This report has been prepared for the exclusive use of the client identified herein and any use of or reliance on this report by any third party is prohibited, except as may be consented to in writing by Stantec or as required by law. The provision of any such consent is at Stantec’s sole and unfettered discretion and will only be authorized pursuant to the conditions of Stantec’s standard form reliance letter.

Stantec assumes no responsibility for losses, damages, liabilities, or claims, howsoever arising, from third party use of this report.

Project Specific limiting conditions are provided in Section 2.2.

The locations of any utilities, buildings and structures, and property boundaries illustrated in or described within this report, if any, including pole lines, conduits, water mains, sewers and other surface or subsurface utilities and structures, are not guaranteed. Before starting site work, the exact location of all such utilities and structures must be confirmed by the client and the party performing the work, and Stantec assumes no liability resulting from damage to such utilities and structures.

The conclusions are based on the conditions encountered at the Subject Property by Stantec at the time the work was conducted. Accordingly, additional studies and actions may be required.

As the purpose of this report is to identify Subject Property conditions which may pose an environmental risk; the identification of non-environmental risks to structures or people on the Subject Property is beyond the scope of this assessment.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Introduction
May 1, 2025
Project No.: 185806936 2.4
The findings, observations, and conclusions expressed by Stantec in this report are not an opinion concerning the compliance of any past or present owner or operator of the Subject Property which is the subject of this report with any Federal, state, provincial or local law or regulation.

This report presents professional opinions and findings of a scientific and technical nature. It does not and shall not be construed to offer a legal opinion or representations as to the requirements of, nor compliance with, environmental laws, rules, regulations, or policies of Federal, state, provincial or local governmental agencies.

Stantec specifically disclaims any responsibility to update the conclusions in this report if new or different information later becomes available or if the conditions or activities on the property subsequently change.

2.4 PERSONNEL QUALIFICATIONS
This Phase I ESA was conducted by, or under the supervision of, an individual that meets the ASTM definition of an EP. The credentials of the EP and other key Stantec personnel involved in conducting this Phase I ESA are provided in Appendix B.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
User-Provided Information
May 1, 2025
Project No.: 185806936 3.1

3.0 USER-PROVIDED INFORMATION
ASTM E1527-21 describe responsibilities of the User to complete certain tasks in connection with the performance of “All Appropriate Inquiries” into the Subject Property. The ASTM standard requires that the EP request information from the User on the results of those tasks because that information can assist in the identification of RECs, CRECs, HRECs, or de minimis conditions in connection with the Subject Property. Towards that end, Stantec requested that the User provide the following documents and information:

Description of Information
Provided
(Yes / No) Description and/or Key Findings
User Questionnaire and/or Interview Yes The User Questionnaire was completed by Bret Ilich, Project Manager with Warmington
Residential, on April 22, 2025. Mr. Ilich was
not aware of any environmental concerns
associated with the Subject Property.

Environmental Liens or Activity and Use
Limitations (AUL)
N/A No environmental liens and/or activity and
use limitations were identified in the
Preliminary Title Reports provided by First
American Title Company dated February 28,
2025.

Previous Environmental Permits or
Reports Provided by User
No None provided.

Purpose of the Phase I ESA Yes The intended use of the Phase I ESA is for redevelopment.

User-provided documents are provided in Appendix C.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Records Review
May 1, 2025
Project No.: 185806936 4.1

4.0 RECORDS REVIEW
The objective of consulting historical sources of information is to develop the history of the Subject Property and surrounding area and evaluate if past uses may have resulted in RECs. Physical setting records are evaluated to determine if the physical setting may have contributed to adverse environmental conditions in connection with the Subject Property. During the review of historical records, Stantec attempted to identify uses of the Subject Property from the present to the first developed use of the Subject Property. Stantec’s research included the reasonably ascertainable and useful records described in this section.

4.1 PHYSICAL SETTING
A summary of the physical setting of the Subject Property is provided in the table below with additional details in the following subsections:

Topography: According to the United States Geologic Survey (USGS) Corona North topographic map provided in the
Environmental Data Resources Inc. (EDR) Physical Setting Source Addendum (Appendix D), the topographic gradient in the vicinity of the Subject Property is to the south-southeast and the Subject Property is located at approximately 576 feet above mean sea level (ft. amsl).

Soil/Bedrock Data: The United States Department of Agriculture – Natural Resources Conservation Service (USDA-NRCS), Web Soil
Survey identifies the soils beneath the Subject Property as:
• Chino silt loam, with well-drained soil with
moderately coarse textures. A typical soil profile is
comprised of fine grained silty-clay (0-59 inches).

Estimated Depth to Groundwater/
Estimated Direction of Gradient:

Site specific groundwater investigations were not conducted during this ESA; however, according to a 2012 groundwater monitoring report for a site located approximately two miles southeast of the Subject Property, groundwater in the vicinity is approximately 23-28 feet below ground surface (bgs) with a flow direction to the south southeast.

NOTE:

Site-specific groundwater flow direction and depth can only be determined by conducting site-specific testing, which Stantec has not conducted.

4.1.1 Subject Property Topography and Surface Water Flow The Subject Property is located at an elevation of approximately 576 ft amsl. Based on the topography and existing surface conditions, general surface water flow is to the south-southeast.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Records Review
May 1, 2025
Project No.: 185806936 4.2

4.1.2 Regional and Subject Property Geology
The Subject Property is located with the Upper Santa Ana Valley Groundwater Basin, Chino Subbasin (8- 002.01). The Chino Subbasin is bound by the Rialto-Colton Fault to the east; the Jurupa Mountains to the southeast; the Puente Hills and Chino Fault to the south; the San Jose Fault to the northwest; and the San Gabriel Mountains and Cucamonga Fault to the north. Surface water drains south via San Antonio Creek and Cucamonga Creek towards Santa Ana River. Several of the faults create groundwater barriers which in turn generate changes in ground water elevations throughout the subbasin. Water-bearing formations within the subbasin are Holocene and Upper Pleistocene alluvium. The total groundwater storage capacity in the subbasin is approximately 18,300,000 acre-feet (DWR, 2003).

According to California DOC Earthquake Zone Map (Department of Conservation Map Server (ca.gov)), the Subject Property is not located within an Alquist-Priolo (AP) Earthquake Fault Zone boundary. The nearest fault is located approximately four miles to the west of the Subject Property.

4.1.3 Regional and Subject Property Hydrogeology
The Subject Property is located with the Upper Santa Ana Valley Groundwater Basin, Chino Subbasin (8- 002.01). Several faults that lie within the subbasin create groundwater barriers which in turn generate changes in ground water elevations throughout the subbasin. Water-bearing formations within the subbasin are Holocene and Upper Pleistocene alluvium. The total groundwater storage capacity in the subbasin is approximately 18,300,000 acre-feet (DWR, 2003).

Site specific groundwater investigations were not conducted during this ESA; however, according to a 2012 groundwater monitoring report for a site located approximately two miles southeast of the Subject Property, groundwater in the vicinity is approximately 23-28 feet below ground surface (bgs) with a flow direction to the south-southeast.

4.2 FEDERAL, STATE AND TRIBAL ENVIRONMENTAL RECORDS
A regulatory agency database search report was obtained from EDR, a third-party environmental database search firm. A complete copy of the database search report, including the date the report was prepared, the date the information was last updated, and the definition of databases searched, is provided in Appendix D.

Stantec evaluated the information listed within the database relative to potential impact to the Subject Property, assessing the potential for impacts based in part on the physical setting. As part of this process, inferences have been made regarding the likely groundwater flow direction at or near the Subject Property. As described in 4.1.3, the inferred shallow groundwater flow direction is likely to be to the southeast. Observations about the Subject Property and adjoining properties made during the Subject Property reconnaissance are provided in more detail in Section 5.

4.2.1 Listings for Subject Property
The Subject Property is not listed in the EDR databases.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Records Review
May 1, 2025
Project No.: 185806936 4.3

4.2.2 Listings for Adjoining and Nearby Sites with Potential to Impact Subject Property
Stantec assessed data presented in the environmental agency database search report to evaluate the potential for conditions on adjoining and nearby sites to pose a REC, CREC, or HREC for the Subject Property. The evaluation included an opinion of the potential for contamination by hazardous substances or petroleum products to migrate to the Subject Property from an adjoining or nearby site, including by vapor migration or encroachment (i.e., potential for a vapor encroachment condition [VEC]. ASTM E2600- 22 Standard Guide for Vapor Encroachment Screening on Property Involved in Real Estate Transactions (ASTM, 2022) was used as the basis for a Tier I Vapor Encroachment Screen (VES) for the Subject Property. This included evaluation of release sites within 1/10 mile for Petroleum Hydrocarbon releases, and 1/3 mile for volatile and semi-volatile organic compound (VOC, SVOC), plus other potential vapor phase contaminants (such as mercury).

Listed Facility Name/Address Database Listing Distance/Direction from Property
REC?
(YES / NO)
Rondo Elementary School
Southeast Corner of Hellman
Avenue and Walters Street
Eastvale, CA 92880
ENVIROSTOR; SCHO Approximately 226 feet
to the south-southwest
No
The site had been used as a dairy operation from approximately 1961 to 2004. The dairy included two residences, milking barn and workshop building, cattle enclosure pens and water troughs. The barn was also used for vehicle maintenance and repairs. A Preliminary Environmental Assessment (PEA) was submitted on April 12, 2017, to the California Department of Toxic Substances Control (DTSC).

The PEA investigation activities included lead from lead]based paints, heavy metals associated with stockpiles suspected to have been stored onsite, total petroleum hydrocarbons (TPH) associated with machinery and/or an underground storage tank (UST) that may have been used at the Site, volatile organic compounds (VOCs) associated with fuels and solvents or septic tanks, organochlorine pesticides (OCPs) associated with past farming and pest control activities, and methane from decay of dairy related organic waste that may pose a threat to human health and the environment. Based on review of the PEA, neither a release of hazardous material nor the presence of a naturally occurring hazardous material, which would pose a threat to public health or the environment under unrestricted land use, was indicated at the Site. Therefore, DTSC concurred with the conclusion of the PEA that further environmental investigation of the Site was not required and approved the PEA. Therefore, this site is not considered a REC to the Subject Property.

The remaining listings in the database search report, including listings of Orphan Sites provided in Appendix D do not constitute a potential REC for the Subject Property.

4.3 LOCAL/REGIONAL ENVIRONMENTAL RECORDS
Stantec checked the following sources to obtain information pertaining to Subject Property use and/or indications of RECs in connection with the Subject Property:

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Records Review
May 1, 2025
Project No.: 185806936 4.4

4.3.1 Environmental Health Department
Agency Name
Contact Information Finding
Custodian of Records
Riverside County Department of
Environmental Health
Via online:
rivcoeh.org
Submitted on April 17, 2025
A written request subject to the Freedom of Information Act (FOIA) was submitted to the Riverside County Department of Environmental Health to review their files regarding the Subject Property. The information requested included file information regarding permits, hazardous materials, waste, complaints, violations, underground or aboveground storage tanks, remedial action, and case closure documentation, or any records that indicate environmental concern at the
Subject Property.

On April 18, 2025, the agency responded that they have no records for the Subject Property.

4.3.2 Fire Department
Agency Name
Contact Information Findings
Custodian of Records
Riverside County Fire Department
Via online:
rvcfire.org
Date Submitted: April 17, 2025
A written request subject to the FOIA was submitted to the County Fire Department to review their files regarding the Subject Property. The information requested included file information regarding permits, hazardous materials, waste, complaints, violations, underground or aboveground storage tanks, remedial action, and case closure documentation, or any records that indicate environmental concern at the
Subject Property.

On April 18, 2025,the agency responded that they have no records for the Subject Property .

4.3.3 City and County Department Records
Agency Name
Contact Information Findings
Custodian of Records
City of Eastvale
Date Submitted: April 17, 2025
A written request subject to the FOIA was submitted to the City to review their files regarding the Subject Property. The information requested included file information regarding permits, hazardous materials, waste, complaints, violations, underground or aboveground storage tanks, remedial action, and case closure documentation, or any records that indicate environmental concern at the Subject Property.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Records Review
May 1, 2025
Project No.: 185806936 4.5
Agency Name
Contact Information Findings
As of the writing of this report, a complete response has not been received from the agency.

4.3.4 State Department Records
Agency Name
Contact Information Finding
Custodian of Records
Santa Ana Regional Water Quality Control Board
(SARWQCB)
Via email: [email protected]
Submitted and accessed on April 17, 2025
Stantec researched Geotracker, the California
Regional Water Quality Control Board public
database, to evaluate if there are any reported
releases at the Subject Property or on adjoining
properties. There were no release sites listed for
the Subject Property or adjoining properties.

Additionally, the SARWQCB responded on April
18, 2025, that they do not have current or historical
records for the Subject Property.

Department of Toxic Substances Control (DTSC),
Envirostor database
Cypress Regional Office
Online database:
https://www.envirostor.dtsc.ca.gov/public/
Via email:
[email protected]
Submitted and accessed on April 17, 2025
Stantec researched Envirostor, the DTSC public
database, to evaluate if there are any reported
releases at the Subject Property or on adjoining
properties. There were no release sites listed for
the Subject Property.

Additionally, the DTSC responded on April 21,
2025, that they have no current or historical
records for the Subject Property.

California Geologic Energy Management
(CalGEM)
Online database:
https://maps.conservation.ca.gov/doggr/wellfinder
Accessed: April 17, 2025
The California Department of Conservation
Geologic Energy Management Division (CalGEM)
database was searched to identify the potential
existence of oil and gas production wells within the
vicinity of the Subject Property. No oil or gas wells
were located within the Subject Property
boundaries. The closest well is located
approximately ½ mile to the south and is listed as
dry plugged hole (API 0406500131). No releases
are reported for this well. This well is not expected
to represent an environmental concern for the
Subject Property.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Records Review
May 1, 2025
Project No.: 185806936 4.6

4.4 HISTORICAL RECORDS REVIEW

4.4.1 Land Title Records/Deeds
No environmental liens and/or activity and use limitations were identified in the Preliminary Title Reports provided by First American Title Company dated February 28, 2025. No other land title records, deeds, environmental liens, and activity and use limitation documentation were provided by the User, and public records were not searched by Stantec.

4.4.2 Aerial Photographs
Stantec reviewed historical aerial photographs provided by EDR. The general type of activity on a property and land use changes can often be discerned from the type and layout of structures visible in the photographs. However, specific elements of a facility's operation usually cannot be discerned from aerial photographs alone. The following table summarizes Stantec’s observations of the reviewed historical aerial photographs. Copies of the historical aerial photographs are provided in Appendix E.

Year Scale Observations of Subject Property and Adjoining/Nearby Properties 1931
1938
1948
1”=500’ The Subject Property appears undeveloped roadways along the western and southern boundaries. Adjoining properties appear to be vacant and agriculturally developed.
1953 1”=500’ The Subject Property remains vacant land. Small structures appear to the southeast, south, and southwest. A river appears approximately 500 feet to the east-southeast.
1967
1975
1985
1”=500’ The Subject Property remains vacant land with a small structure along the southern boundary. This may be the existing cattle pen. A dairy appears to the south. Additional small structures appear to the east and west. Vacant and agricultural land appears to the north and west.
1989
1990
1994
1”=500’ The northern portion of the Subject Property remains vacant land. Small structures likely associated with cattle appear in the southern portion of the Subject Property. The surrounding area appears similar to the previous photographs.
2002 1”=500’ Small structures, storage containers, or trucks appear in the eastern and northern portions of the Subject Property. Additional small buildings appear adjacent to the east. The remaining surrounding area appears similar to the previous photographs.
2006
2009
1=500’ The Subject Property appears similar to the previous photographs. Grading for a large residential development appears to the east and north. The remaining surrounding area appears similar to the previous photograph. 2012
2016
1=500’ The Subject Property appears similar to the previous photographs. Dense residential development appears to the east and north. Grading activities have occurred to the west beyond the roadway.
2020 1=500’ The Subject Property appears similar to the previous photographs. A school appears to the south beyond the roadway. The remaining surrounding area appears similar to the previous photograph.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Records Review
May 1, 2025
Project No.: 185806936 4.7
Aerial photographs source: The EDR Aerial Photo Decade Package The historical agricultural use of the Subject Property constitutes a REC.

4.4.3 City Directories
Stantec retained a third party to research available city directories for the Subject Property and adjoining and nearby properties, in approximately five-year intervals. Copies of the city directory listings are provided in Appendix E. The Subject Property is listed in the city directory between 1992 and 2020 as Dean Visscher / Visscher Livestock Transportation / Cow Truck Inc. Adjoining properties and properties within the vicinity include primarily residential listings.

4.4.4 Historical Fire Insurance Maps
Fire insurance maps were developed for use by insurance companies to depict facilities, properties, and their uses for many locations throughout the United States. These maps provide information on the history of prior land use and are useful in assessing whether there may be potential environmental contamination on or near the Subject Property. These maps, which have been periodically updated since the late 19th century, often provide valuable insight into historical Subject Property and adjoining and nearby property uses.

Stantec requested fire insurance maps from EDR; however, no coverage exists for the Subject Property.

The Sanborn® Map Search Report indicating “No Coverage” is presented in Appendix E.

4.4.5 Historical Topographic Maps
Stantec reviewed historical USGS 7.5-minute Topographic Maps of the Corona North and Corona and Vicinity, California Quadrangles (scales 1:24,000 and 1:31,680), the historical USGS 15-minute Topographic Maps of the Corona, California Quadrangles (scale 1:50,000), and the historical USGS 30- minute Topographic Maps of the Corona, California (scale 1:125,000) to help identify past Subject Property and adjoining and nearby property usage and areas of potential environmental concern. Copies of the historical maps are provided in Appendix E.

The following table summarizes the maps reviewed and our observations.

Year Scale
Observations of Subject Property and Adjoining/Nearby
Properties
1902 1:125,000 The Subject Property and adjoining properties are not depicted. 1942
1947
1:31,680
1:50,000
The Subject Property and adjoining properties are undeveloped. The county line appears along the western Subject Property boundary. A dirt roadway appears adjacent to the south.
1950/1954
1967
1973
1:24,000
1:24,000
1:24,000
The Subject Property and adjoining properties are undeveloped.

Small structures appear to the southeast and southwest. The levee for the Cucamonga Creek appears within ¼ mile to the eastsoutheast.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Records Review
May 1, 2025
Project No.: 185806936 4.8
Year Scale
Observations of Subject Property and Adjoining/Nearby
Properties
1975
1981
1:24,000
1:24,000
2012
2015
2018
2022
1:24,000
1:24,000
1:24,000
1:24,000
No site details are depicted. Roadways appear in their current configuration.

Historical topographic maps source: The EDR Historical Topographic Map Report No RECs were identified in the EDR Historical Topographic Map Report.

4.4.6 Other Historical Sources
No other historical sources were searched as a part of this assessment.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Site Reconnaissance
May 1, 2025
Project No.: 185806936 5.1

5.0 SITE RECONNAISSANCE
A visit to the Subject Property and its vicinity was conducted by Hiram Romero, Geologic Staff with Stantec, on April 28, 2025. Stantec was unaccompanied during the Subject Property visit. Figure 2 provides information about the Subject Property and adjoining sites and the location of potential areas of environmental concern. Detailed Subject Property features are shown on Figure 2. Photographs collected during the site reconnaissance are included in Appendix A.

5.1 SITE RECONNAISSANCE METHODOLOGY
The site reconnaissance focused on observation of current conditions and observable indications of past uses and conditions of the Subject Property that may indicate the presence of RECs. The reconnaissance of the Property was conducted on foot and Stantec utilized the following methodology to observe the Property:
• Traverse the outer Subject Property boundary
• Traverse transects across the Subject Property
Weather conditions during the visit to the Subject Property were clear and sunny. There were no weatherrelated Subject Property access restrictions encountered during the reconnaissance visit. The interior of the residential structure was not accessible during the site reconnaissance.

5.2 GENERAL DESCRIPTION
Subject Property and Area
Description:

The Subject Property is located s northeast of the intersection of Hellman Avenue and Walters Street, Eastvale, Riverside County, California 92880. The surrounding area consists of a concrete drainage channel, an elementary school, and residential structures.

Subject Property
Operations:

Undeveloped land.

Structures, Roads, Other
Improvements:

A locked chain linked fence surrounds the Subject Property.

Subject Property Size
(acres):

3.2 acres
Estimated % of Subject
Property Covered by
Buildings and/or Pavement:
0%
Observed Current Subject
Property Use/Operations:

Undeveloped land.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Site Reconnaissance
May 1, 2025
Project No.: 185806936 5.2
Observed Evidence of Past
Subject Property Use(s):

Former cattle pens appear along the southern Subject Property boundary.

Sewage Disposal Method
(and age):

Jurupa Community Services District
Potable Water Source: Jurupa Community Services District Electric and Natural Gas
Utilities:

Southern California Edison and SoCal Gas.

5.3 HAZARDOUS SUBSTANCES AND PETROLEUM PRODUCTS
The following table summarizes Stantec’s observations during the Subject Property reconnaissance.

Observations Description/Location
Hazardous Substances and
Petroleum Products as Defined by
CERCLA 42 U.S.C. § 9601(14) with
identified uses:

None observed.

Drums/Totes/Intermediate Bulk
Containers (≥ 5 gallons):

None observed.

Strong, Pungent, or Noxious
Odors:

None observed.

Pools of Liquid: None observed.

Unidentified Substance Containers: None observed.

Polychlorinated biphenyl (PCB)-
Containing Equipment:

None observed
Other Observed Evidence of
Hazardous Substances or
Petroleum Products:

None observed.

5.4 INTERIOR OBSERVATIONS
No structures were present on the Subject Property.

5.5 EXTERIOR OBSERVATIONS
Stantec made the following observations during the site reconnaissance of exterior areas of the Subject Property and/or identified the following information during the interview or records review portions of the assessment:

Observations Description
On-site Pits, Ponds, or Lagoons: A pool was observed in the southeastern portion of the Subject Property.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Site Reconnaissance
May 1, 2025
Project No.: 185806936 5.3
Observations Description
Stained Soil or Pavement: None observed.

Stressed Vegetation: None observed.

Waste Streams and Waste
Collection Areas:

Debris piles with various household debris, used tires, and building demolition waste were also observed in the center of the Subject Property
Solid Waste Disposal: None observed.

Potential Areas of Fill Placement: No mounds, piles, or depressions suggesting the placement of fill material were observed on the Subject Property.

Wastewater: No exterior wastewater discharge was observed.

Stormwater: Stormwater is expected to infiltrate the soil.

Wells: An irrigation well appears in the northern portion of the Subject Property.

Septic Systems: No visible evidence of the existence of a septic system was observed.

Other Exterior Observations: A former cattle pen was observed in the southern portion of the Subject Property along Walters Avenue. .

5.6 UNDERGROUND STORAGE TANKS/STRUCTURES
Existing
USTs:

No visible evidence (fill pipes, vent pipes, dispensers, surface patches), which would indicate the presence of USTs, was discovered during the site reconnaissance.

Former
USTs:

No visible evidence (fill pipes, vent pipes, dispensers, surface patches), reports, or other evidence of the former presence of USTs was discovered during this Phase I ESA.

Other
Underground
Structures:

None observed.

5.7 ABOVEGROUND STORAGE TANKS
Existing
ASTs:

No visible evidence (fill pipes, vent pipes, dispensers, surface stains), reports, or other evidence of the presence of ASTs was discovered during this Phase I ESA.

Former
ASTs:

No visible evidence (fill pipes, vent pipes, dispensers, surface stains), reports, or other evidence of the former presence of ASTs was discovered during this Phase I ESA.

5.8 ADJOINING PROPERTIES

5.8.1 Current Uses of Adjoining Properties
As viewed from the Subject Property and/or from public rights-of-way, Stantec made the following observations about use and activities on adjoining sites:

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Site Reconnaissance
May 1, 2025
Project No.: 185806936 5.4
NORTH Concrete drainage channel.

EAST Residential.

SOUTH Walters Avenue beyond which is an elementary school.

WEST Hellman Avenue beyond which are residential structures.

Refer to Figure 2.

5.8.2 Observed Evidence of Past Uses of Adjoining Properties Observations of adjoining sites providing indications of past use and activities, if any, are described below.

NORTH None observed.

EAST None observed.

SOUTH None observed.

WEST None observed.

5.8.3 Pits, Ponds, or Lagoons on Adjoining Properties
As viewed from the Subject Property and/or from public rights-of-way, Stantec made the following observations about the presence of pits, ponds, and lagoons on adjoining sites:

NORTH None observed.

EAST None observed.

SOUTH None observed.

WEST None observed.

5.9 OBSERVED PHYSICAL SETTING
Topography of the
Subject Property and
Surrounding Area:

The Subject Property and surrounding area are relatively flat.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Evaluation
May 1, 2025
Project No.: 185806936 6.1

6.0 EVALUATION
This section provides a summary overview of or Findings, Opinions, and Conclusions.

6.1 FINDINGS AND OPINIONS
Information gathered from interviews, reviews of existing data, and an inspection was evaluated to determine if RECs are present in connection with the Subject Property. Based on this information, Stantec made the following findings and developed the following opinions. • Based on review of historical sources including aerial photographs and city directory listings, the Subject Property was formerly utilized for livestock holding and a storage area of the trucks and trailers used in the transportation of livestock. During the site reconnaissance, a former cattle pen was observed in the southern portion of the Subject Property along Walters Avenue. No evidence of dairy operations or agricultural use was observed on the Subject Property. • An environmental records search was performed and identified sites within their respective ASTM E1527-21 search radii of the Subject Property that may represent RECs, CRECs, HRECs, or de minimis conditions.

Based on one or more of the following reasons: distance from the Subject Property, position of sites with respect to assumed groundwater flow direction, the type of native soils, and regulatory status, none of the sites identified in the environmental records search report are expected to impact soil or groundwater quality at the Subject Property. The environmental records search identified no RECs, CRECs, HRECs or de minimis conditions at or near the Subject Property. • During the site reconnaissance, an irrigation well was observed in the northern portion of the Subject Property. The presence of an irrigation well is not considered an environmental concern to the Subject Property; however, if the well is not going to be used in the future it should be decommissioned in accordance with applicable regulatory requirements before grading activities occur.
• Debris piles with various household debris, used tires, and building demolition waste were also observed in the center of the Subject Property. The discarded building materials should be tested for the presence of asbestos-containing materials (ACMs) before off-site disposal in accordance with applicable federal and local regulations.

6.2 DATA GAPS
The federal AAI final rule [40 CFR 312.10(a)] and ASTM E1527-21 identify a “data gap” as the lack or inability to obtain information required by the standards and practices of the rule despite good faith efforts by the EP or the User.

Any data gaps resulting from the Phase I ESA described in this report are listed and discussed below.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Evaluation
May 1, 2025
Project No.: 185806936 6.2
Gap Discussion
Deletions or Exceptions from
Scope of Work Referenced in
Section 1.4:

None.

Weather-Related Restrictions to
Site Reconnaissance:

None.

Facility Access Restrictions to
Site Reconnaissance:

None.

Other Site Reconnaissance
Restrictions:

None.

Data Gaps from Environmental
Records Review:

None.

Data Gaps from Historical
Records Review:

None.

Data Gaps from Interviews: Due to the sensitive nature of the transaction no on-site interview was conducted. Given the historical documents, the lack of an on-site interview is not considered to impact the findings of this report.

Other Data Gaps: None.

6.3 CONCLUSIONS
We have performed a Phase I ESA in conformance with the scope and limitations of ASTM Practice E1527-21 of the Subject Property. Any exceptions to, or deletions from, this practice are described Section 2.3 of this report. This assessment has revealed no recognized environmental conditions (RECs), Controlled RECs (CRECs), or significant data gaps in connection with the Subject Property. No further investigation appears to be warranted at this time.

This assessment has revealed the following items of note in connection with the Subject Property:
• Debris piles with various household debris, used tires, and building demolition waste were also observed in the center of the Subject Property. The discarded building materials should be tested for the presence of asbestos-containing materials (ACMs) before off-site disposal in accordance with applicable federal and local regulations. • Additionally, during the site reconnaissance, an irrigation well was observed in the northern portion of the Subject Property. The presence of an irrigation well is not considered an environmental concern to the Subject Property, however, if the well is not going to be used in the future it should be decommissioned in accordance with applicable regulatory requirements before grading activities occur.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Non-Scope Considerations
May 1, 2025
Project No.: 185806936 7.1

7.0 NON-SCOPE CONSIDERATIONS
The following ASTM E1527-13 non-scope services were performed as part of this Phase I ESA:

7.1 LEAD-BASED PAINT
Concern for LBP is primarily related to residential structures. The EPA’s Final Rule on Disclosure of LeadBased Paint in Housing (40 CFR Part 745) defines LBP as paint or other surface coatings that contain lead equal to or in excess of 1.0 milligram per square centimeter or 0.5 percent by weight.

The risk of lead toxicity in LBP varies based upon the condition of the paint and the year of its application.

The U.S. Department of Housing and Urban Development (HUD) has identified the following risk factors:
• The age of the dwelling as follows:
− Maximum risk is from paint applied before 1950.
− There is severe risk from paint applied before 1960.
− There is moderate risk from deteriorated paint applied before 1970. − There is slight risk from the paint that is intact but applied before 1977. • The condition of the painted surfaces.
• The presence of children and certain types of households in the building. • Previously reported cases of lead poisoning in the building or area.

Given there are no structures present LBP is not considered an environmental concern.

7.2 ASBESTOS
Asbestos can be found in many applications, including sprayed-on or blanket-type insulation, pipe wraps, mastics, floor and ceiling tiles, wallboard, mortar, roofing materials, and a variety of other materials commonly used in construction. The greatest asbestos-related human health risks are associated with friable asbestos, which is ACM that can be reduced to powder by hand pressure. Friable asbestos can become airborne and inhaled, which has been associated with specific types of respiratory disease. The manufacturing and use of asbestos in most building products was curtailed during the late 1970s.

The building material debris pile should be tested for asbestos before it is disposed of off-site.

7.3 RADON
Radon is a colorless, tasteless radioactive gas with an EPA-specified action level of 4.0 PicoCuries per liter of air (pCi/L) for residential properties. Radon gas has a very short half-life of 3.8 days. The health risk potential of radon is primarily associated with its rate of accumulation within confined areas near or in the ground, such as basements, where vapors can readily transfer to indoor air from the ground through foundation cracks or other pathways. Large, adequately ventilated rooms generally present limited risk for

PHASE I ENVIRONMENTAL SITE ASSESSMENT
Non-Scope Considerations
May 1, 2025
Project No.: 185806936 7.2
radon exposure. The radon concentrations in buildings and homes depend on many factors, including soil types, temperature, barometric pressure, and building construction (EPA, 1993).

Stantec reviewed regional data published by the EPA on average indoor radon concentrations in the vicinity of the Property (http://www.epa.gov/radon/zonemap.html).

EPA Radon Zones (w/Average Measured Indoor Radon concentrations) Zone 1 – High
(>4.0 pCi/L)
Zone 2 – Moderate
(2 to 4 pCi/L)
Zone 3 – Low
(<2 pCi/L)
X
Normally occupied sub grade areas present? (i.e., basement apartments, offices, stores, etc.) No subgrade areas currently present at the Property.

The Subject Property is located in Zone 2 and is considered to have a moderate potential for radon. To determine Subject Property-specific radon levels, a radon survey would have to be conducted. However, because the Subject Property does not have any occupied subgrade areas and is planned for redevelopment, further investigation of indoor radon issues does not appear to be warranted.

7.4 FLOOD ZONES
According to the Physical Setting summary portion of the EDR report, the eastern border (adjoining the Santa Ana River) of the Subject Property is located within a 0.2% Annual Chance Flood Hazard Zone.

PHASE I ENVIRONMENTAL SITE ASSESSMENT
References
May 1, 2025
Project No.: 185806936 8.1

8.0 REFERENCES
ASTM International, 2021, Standard Practice for Environmental Site Assessments: Phase 1 Environmental Site Assessment Process, Designation: E 1527-21.

ASTM International, 2022, Standard Guide for Vapor Encroachment Screening on Subject Property Involved in Real Estate Transactions, Designation E 2600-22.

California Department of Toxic Substances Control, 2025, EnviroStor.

California Department of Water Resources (DWR), 2003. California’s Groundwater Bulletin 118: Santa Ana Valley Groundwater Basin, Chino Subbasin.

California State Department of Water Resources Control Board, 2025, GeoTracker.

California State Department of Water Resources SGMA Portal (SGMA), 2025, GeoTracker.

Environmental Data Resources, Inc. (EDR), 2024. EDR Radius Map with Geocheck, Inquiry Number 7961809.2s, dated April 17, 2025.
_____, Certified Sanborn Map Report, Inquiry Number 7961809.3, dated April 17, 2025. _____, Historical Topographic Map Report, Inquiry Number 7961809.4, dated April 17, 2025. _____, Aerial Photo Decade Package, Inquiry Number 7961809.8, dated April 17, 2025. _____, City Directory Abstract, Inquiry Number 7961809.5 dated April 18, 2025.

FIGURES

Project No.:

Scale:

Date:

Dwn. By:

App'd By:

Stantec Consulting Ltd.

Client:

NOTE: THIS DRAWING ILLUSTRATES SUPPORTING INFORMATION SPECIFIC TO A STANTEC SERVICES INC. REPORT AND MUST NOT BE USED FOR OTHER PURPOSES. 185806936 Fig. No.:
1 AS SHOWN
25/05/02
CD
KE

SUBJECT PROPERTY LOCATION MAP

PHASE I ENVIRONMENTAL SITE ASSESSMENT
7500 HELLMAN AVENUE, EASTVALE, CALIFORNIA 92880

WARMINGTON RESIDENTIAL
© 2025
DM
SC2025050013
0 2500
SCALE : AS SHOWN
5000 7500 ft

SUBJECT PROPERTY

Stantec Consulting Ltd.

NOTE: THIS DRAWING ILLUSTRATES SUPPORTING INFORMATION SPECIFIC TO A STANTEC CONSULTING LTD. REPORT AND MUST NOT BE USED FOR OTHER PURPOSES.

Client:

Project No.:

Scale:

Date:

Dwn. By:

App'd By:
185806936 Fig. No.:
2 AS SHOWN
25/05/02
CS
KE

SUBJECT PROPERTY DETAILS

PHASE I ENVIRONMENTAL SITE ASSESSMENT
7500 HELLMAN AVENUE, EASTVALE, CALIFORNIA 92880
WARMINGTON RESIDENTIAL © 2025
DM
SC2025050014
LEGEND

SUBJECT PROPERTY

BOUNDARY
SCALE : AS SHOWN
0 50 100 150 200FT

TRASH PILE - VARIOUS

ITEMS INCLUDING

REFRIGERATORS AND

OTHER UNKNOWN
WASTE
WATER WELL 6" -

STEEL WITH PUMP
INSIDE - 2" RISER PIPE

TRASH PILE - LARGE

AMOUNTS OF TIRES
OBSERVED. OTHER

DEBRIS INCLUDING

APPLIANCES ALSO

OBSERVED

BUILDING DEMO WASTE -

UNKNOWN AGE OF

MATERIALS POTENTIAL

FOR ASBESTOS

DEPENDING ON AGE OF

BUILDINGS

CATTLE CLEANING

WALKUP STRUCTURE

RESIDENTIAL
VACANT
SCHOOL

RESIDENTIAL RESIDENTIAL

RESIDENTIAL

W A L T E R S S T R E E T H E L L M A N A V E N U E S I L V E R S A D D L E C T

B R I D A L T R A I L C I R C L E

RESIDENTIAL

APPENDICES

APPENDIX A

PHOTOGRAPHS OF THE

PROPERTY AND VICINITY

Photographs of the Property
Site Address: 7500 Hellman Avenue, Eastvale, CA 92880
Date: April 28, 2025

Photo #1 View of remaining cattle pen in the southern portion of the Subject Property.

Photo #2 View of irrigation well on the northern portion of the Subject Property.

Photographs of the Property
Site Address: 7500 Hellman Avenue, Eastvale, CA 92880
Date: April 28, 2025

Photo #3 View of the debris piles in the center of the Subject Property.

Photo #4 View of the used tire debris piles in the center of the Subject Property.

Photographs of the Property
Site Address: 7500 Hellman Avenue, Eastvale, CA 92880
Date: April 28, 2025

Photo #5 View of the Subject Property looking north.

Photo #6 View of Walters Avenue and the elementary school to the south.

APPENDIX B

STANTEC RESUMES

* denotes projects completed with other firms
Alicia Jansen CAC, LRCIA
Senior Scientist
21 years of experience
Alicia is a Senior Scientist with over twenty years of
experience in Phase I and II Environmental
Assessments, with strong emphasis in water quality
and environmental research. Alicia has managed the
preparation of environmental documents, training
programs, and environmental compliance during large
scale environmental monitoring projects. Alicia’s
environmental consulting experience includes
performing asbestos and lead-based paint surveys,
oversight of contractors during asbestos abatement,
hazardous materials surveys, and Phase I
Environmental Site Assessments (ESAs) in
accordance with the practices identified in the
American Society for Testing and Materials (ASTM)
Standard Practice for Environmental Site
Assessments: Phase I Environmental Site
Assessment Process, ASTM Designation E 1527-21
and the Standard Practice for Environmental Site
Assessments for Forestland or Rural Property, ASTM
Designation E 2247-16.

EDUCATION
BA, Environmental Studies, San Jose State University,
San Jose, California, 2004

CERTIFICATIONS & TRAINING
Residential Measurement Provider, 108212, National
Radon Proficiency Program, Anaheim, California, 2015

REGISTRATIONS
Certified Asbestos Consultant #CAC #15-5379, State of
California Division of Occupational Safety and Health
Lead Inspector/Risk Assessor #LRC-00005363,
California Department of Public Health

MEMBERSHIPS
Member, Groundwater Resources Association of
California

PROJECT EXPERIENCE

HEALTH, SAFETY & INDUSTRIAL HYGIENE
Cochise County, Asbestos, Lead-Based Paint, and
Hazardous Materials Survey | Arizona | Field Lead and
Certified Asbestos Consultant
Alicia conducted with site inspections for asbestos, leadbased paint, and hazardous materials at multiple vacant structures including schools, multi-tenant apartment
buildings, and commercial structures. The scope of work involved sample collection for asbestos and lead-based
paint in addition to the quantification of universal wastes (PCBs, mercury containing equipment, refrigerants, etc.) that would require special handling and disposal. She
assisted with the preparation of reports summarizing
findings. Role: Field Lead | Dates involved: 2020-2022
Confidential Health Care Company, Asbestos, LeadBased Paint, and Hazardous Materials Survey | Northern California | Staff
Alicia assisted with site inspections for asbestos, leadbased paint, and hazardous materials at multiple occupied hospitals and office spaces. The scope of work involved sample collection for asbestos and lead-based paint in
addition to the quantification of universal wastes (PCBs, mercury containing equipment, refrigerants, etc.) that
would require special handling and disposal. She
assisted with the preparation of reports summarizing
findings. Role: Field Lead | Dates involved: 2013-2020
State of California General Services, Asbestos, LeadBased Paint, and Hazardous Materials Survey | Northern California | 2009 | Technical Support
Alicia assisted with site inspections for asbestos, leadbased paint, and hazardous materials at multiple communication towers in remote areas. The scope of
work involved sample collection for asbestos and leadbased paint in addition to the quantification of universal wastes (PCBs, mercury containing equipment,
refrigerants, etc.) that would require special handling and disposal. She assisted with the preparation of reports
summarizing findings. Role: Technical Support | Cost:

Unknown | Dates involved: 10/2009-10/2009
Indoor Air Quality Assessments* | San Jose, California | 2002-2005 | Staff
Alicia performed site inspections, interviews, and collected air samples to be analyzed for various air pollutants and molds including formaldehyde, penicillium, aspergillus, cladosporium, and stachybotry. She prepared reports
summarizing findings and made recommendations.

Veteran's Administration of Puget Sound, Asbestos and
Lead-Based Paint Survey | Seattle, Washington | 2009 |
Project Scientist
Alicia served as the Project Scientist responsible for
hazardous building material assessments, specifically
asbestos and lead-based paint. These services were
required as part of the pre-design tasks for this project.

Over 300 samples were collected over the span of four
days culminating in a final hazardous building materials report to be incorporated into the facility design as well as demolition activities once the construction phase of the

* denotes projects completed with other firms
project commences.

Interim Remedial Action, Indoor Air Sampling, and SubSlab Soil Gas Sampling | Sunnyvale, California | 2004– 2014 | Task Manager and Field Support
Alicia conducted an indoor air sampling survey using air sampling pumps, dosimeter badges, and flame ionization
detector (FID) during a sump excavation. She performs
semi-annual sub-slab soil vapor sampling and indoor air quality surveys using summa canisters. She assists with the preparation and submittal of reports summarizing the findings and provides recommendations to the local
regulatory agency. Role: Indoor Air Sampling Survey |
Cost: Unknown | Dates involved: 09/2004-09/2014
Lead Dust Assessment and Abatement Oversight |
Fremont, California | 2009 | Technical Support
Alicia assisted with the evaluation of lead dust in an
industrial facility. A total of 307 dust wipe samples were collected in order to evaluate the potential presence of lead dust throughout the two-story, 500,000 square foot manufacturing building. Role: Technical Support | Cost:

Unknown | Dates involved: 01/2009-03/2009
Former Tesoro Coke Facility, Asbestos, Lead-Based
Paint Survey | Pittsburg, California | Technical Support Alicia assisted with an asbestos and lead paint survey of 20 structures at the facility ultimately scheduled for
demolition. More than 200 samples were collected over
the span of two days. She prepared a report for
demolition while also providing the information needed
for worker safety during demolition activities at the
facility. Role: Technical Support | Cost: Unknown | Dates involved: 04/2009-04/2009
State of California General Services, Asbestos and LeadBased Paint Survey | Southern California | 2014-2019 | Certified Asbestos Consultant
Alicia conducted with site inspections for asbestos and lead-based paint at multiple bridges, maintenance
stations, and roadways throughout Southern California.

The scope of work involved sample collection for
asbestos and lead-based paint that would require special handling and disposal. She assisted with the review and approval of reports summarizing findings. Role: Certified Asbestos Consultant | Cost: Unknown | Dates involved:
9/2014-10/2019
Confidential Client, Asbestos and Lead-Based Paint
Survey | Multiple Sites, California | Task Manager and
Certified Asbestos Consultant
Alicia conducts pre-demolition asbestos and lead paint
surveys of structures ultimately scheduled for demolition.

She prepared a report for demolition while also providing the information needed for worker safety during
demolition activities at the facility. Role: Task Manager and Certified Asbestos Consultant| Dates involved: 2006 - present

PERMITTING, COMPLIANCE, AUDITING
Tesoro Refinery, Initial Study* | Benicia, California | 2005 | Staff
Alicia assisted with the background research and
preparation of applicant-prepared initial study for the upgrade of a refinery.

Transmission Line Upgrade* | San Mateo to San
Francisco, California | 2005 | Environmental Research
and Compliance Staff
Alicia supported the environmental compliance program
for the construction of a 27-mile 230 kV underground and overhead transmission line. She assisted with the
preparation and submittal of variance requests, extra work space requests, and daily and weekly reports for submittal to the California Public Utilities Commission. She also conducted research and assisted with training and report preparation.

REMEDIAL INVESTIGATIONS & ASSESSMENTS
California Department of Transportation Portfolio | Multiple Sites, Northern California and Southern California,
California | 2008-2019 | Task Lead Manager
Alicia prepared quarterly groundwater monitoring reports, subsurface investigation reports, sensitive receptor
surveys, and preferential pathway studies for various
California Department of Transportation locations
throughout Northern California. She assisted with the
utility locating, work plan preparation, field coordination, archived data onto the State Water Resource Control
Board’s (RWQCB) Geotracker electronic filing system.

Alicia currently conducts site inspections for asbestos, lead-based paint, and hazardous materials for bridges,
salt barns, and maintenance buildings associated with
California Department of Transportation locations
throughout Southern California. The scope of work
involves sample collection for asbestos and lead-based
paint that would require special handling and disposal.

She assists with the preparation of reports summarizing findings. Role: Task Lead Manager | Cost: Unknown |
Dates involved: 06/2008-02/2019
Soil Gas Sampling and Human Health Risk Assessment |
San Jose, California | 2014 | Project Lead
Alicia performed a soil vapor survey in conformance with the DTSC Advisory Active Soil Gas Investigations, using soil vapor sampling devices and a mobile laboratory for onsite chemical analysis. She also assisted with the
report preparation summarizing the findings and providing recommendations for further assessment. Role: Task
Lead Manager | Cost: Unknown | Dates involved: 2014
Confidential Clients, Phase I Environmental Site
Assessments | Multiple Sites, California, Arizona, New
Mexico, Texas, Virginia | Task Manager
Alicia performs Phase I Environmental Site Assessments
for multiple confidential clients in accordance with the practices identified in the American Society for Testing and Materials (ASTM) Standard Practice for
Environmental Site Assessments: Phase I Environmental
Site Assessment Process, ASTM Designation E 1527-13;
ASTM E 1527-21; and Standard Practice for
Environmental Site Assessments for Forestland or Rural
Property, ASTM Designation E 2247-16 to achieve
compliance with requirements of the “All Appropriate
Inquiries” rule required to obtain protection from liability under the federal Comprehensive Environmental
Response, Cleanup and Liability Act (CERCLA). Previous
sites include large industrial warehouses, multi-tenant

* denotes projects completed with other firms
commercial buildings, large lots of vacant land, and
residential properties. She reviews topographic maps,
Sanborn Fire Insurance Maps, and files at local
regulatory agencies. She interviews present and former
property owners and performed site and adjacent
property reconnaissance. She prepares reports
summarizing the findings and provides recommendations
for further assessment if applicable. Role: Task Lead
Manager | Cost: $3,000-8,000 per report. | Dates
involved: 2006-present
Goodyear Portfolio | California and Hawaii | 2005–2020 | Project Lead
Alicia performed Phase I Environmental Site
Assessments (ESA) and Phase II Site Assessments for
various Goodyear Tire & Rubber Company locations
throughout California and Hawaii. She assisted with the installation of monitoring wells and exploratory borings; underground storage tank removals; site restoration;
product removal with passive recovery system; archived
data onto the State Water Resource Control Board’s
Geotracker electronic filing system; and assisted with the preparation of quarterly groundwater monitoring reports, sensitive receptor surveys, site conceptual models, and subsurface investigation reports. Approximately 250 Sites • Cost: $8,000 per site.

* denotes projects completed with other firms
Jenny Alvarado
Project Biologist
9 years of experience
A wildlife biologist who specializes in the avian and
botanical fields, Jenny performs threatened and
endangered species surveys, protocol nesting bird
surveys, biological resource assessments, habitat
characterization surveys, and restoration monitoring
across Southern California. Jenny has prepared
permit applications for CDFG Streambed Alteration
Agreements (CDFG Section 1600), Regional Water
Quality Control Board Water Quality Certifications
(Clean Water Act Section 401), and U.S. Army Corps
of Engineers Permits (Clean Water Act Section 404).

Jenny is also experienced with California
Environmental Quality Act and National Environmental
Policy Act compliance. Although her background is
mainly avian biology, she has experience identifying
mammals, reptiles, and aquatic species. She performs
compliance monitoring for a wide array of clients,
including Southern California Gas Company, Plains All
American Pipeline, and Caltrans. She assists in
preparing Initial Studies, Mitigated Negative
Declarations, Environmental Assessments, and
Environmental Impact Reports for a variety of land
uses. Additionally, she has experience assisting with
asbestos and lead building surveys in California and
Hawaii.

EDUCATION
Ecology, Zoology, Ornithology, Santa Barbra City
College, Santa Barbara, California, 2011
BA, Physical Anthropology, University of California,
Santa Barbra, Santa Barbara, California, 2008
AA, Liberal Arts, Ventura College, Ventura, California, 2005

CERTIFICATIONS & TRAINING
Asbestos Building Inspector Initial, Natec International, Inc., Thousand Oaks, California, 2016
Asbestos 40-Hr Contractor/Supervisor, Natec
International, Inc., Thousand Oaks, California, 2016
CPR and First Aid Certification, American Red Cross,
Port Hueneme, California, 2015
California Plant Family Identification Workshop, California Native Plant Society, Ojai, California, 2015
40-Hr HAZWOPER, OSHA, Temecula, California, 2015
Desert Tortoise Field Techniques Workshop, Desert
Tortoise Council, Ridgecrest, California, 2014
Metrolink Contractor Safety Railroad Training, Metrolink, Pico Rivera, California, 2014
10-Hr Industrial Safety Training, OSHA, Ventura,
California, 2014

REGISTRATIONS
Certified Erosion, Sediment and Storm Water Inspector
#1586, Certified Inspector of Sediment and Erosion
Control
Certified Erosion, Sediment and Storm Water Inspector
#1586, CISEC, Inc., 6/30/2018

PROJECT EXPERIENCE

WILDLIFE BIOLOGY
Los Angeles County Beaches and Harbors Beach Berm
Construction* | Los Angeles County, California | Snowy
Plover Monitor
Jenny conducted snowy plover monitoring on five Los
Angeles County beaches during berm construction and
deconstruction. Daily monitoring reports were submitted to the County.

United Water District, Least Tern Surveys* | United Water Conservation District | Saticoy, California | Biologist Jenny conducted weekly least tern surveys over two
nesting seasons at the United Water facility. She drafted the final results report for the District.

McGrath State Beach Tidewater Goby and Water Quality
Monitoring* | California Department of Fish and Wildlife | Ventura, California | Biologist
Jenny conducted daily tidewater goby sein netting surveys and relocation for an emergency construction project in the Santa Clara River estuary. She also performed daily water quality sampling and invasive species removal.

Ormond Beach Snowy Plover and Least Tern Surveys* |
California Department of Fish and Wildlife | Ventura,
California | Biologist
Jenny conducted protocol nesting bird surveys for the
snowy plover and least tern within protected enclosures.

Nesting behaviors, nest location, and young were tracked, documented and monitored throughout the nesting
season.

California State University Channel Islands, Least Bell’s Vireo Surveys* | California State University Channel
Islands | Camarillo, California | Biologist
Jenny conducted least Bell’s vireo surveys on the CSUCI campus for one nesting season, and assisted in
preparation of final reporting.

* denotes projects completed with other firms
Special-Status Species Surveys* | Recurrent Energy |
Kern County, California | Biologist
Jenny conducted desert tortoise, burrowing owl and kit
fox surveys for several solar projects across Kern
County.

Stantec Architecture, FedEx Construction Site Burrowing Owl Survey | Bloomington, California | Biologist
Jenny performed a pre-construction special status
species survey as well as burrowing owl
presence/absence surveys in support of a proposed
expansion project at a FedEx Ground facility. While
conducting the survey, Jenny observed one burrowing
owl within the proposed project area and helped
coordinate additional protocol surveys in accordance with the project’s mitigation requirements.

Luis Oasis Senior Center, Biological Constraints Analysis | Orcutt, California | Biologist
Jenny performed a field reconnaissance survey to
document existing site conditions, the potential for
sensitive biological resources, and took an inventory of protected native trees. Jenny also drafted the Biological Constraints Analysis Report for the project.

Town Building and Development, ISBA | Ventura County,
California | Biologist
Jenny performed a field reconnaissance survey and
prepared an ISBA to document existing habitat conditions and the potential for sensitive biological resources in accordance with County of Ventura ISBA requirements.

Algonquin Power, SKIC 10 Solar Project San Joaquin Kit
Fox, Burrowing Owl, Nesting Bird and Wildlife Clearance Surveys | Bakersfield, California | Biologist
Jenny performed San Joaquin kit fox, burrowing owl,
nesting bird, and wildlife clearance surveys prior to
project construction.

Comstock Homes, Burrowing Owl Surveys | Camarillo,
California | Biologist
Jenny prepared a proposal and conducted burrowing owl
presence/absence surveys for a residential development
project in Camarillo. She also concurrently performed a nesting bird survey of the project area and prepared a
report of the results.

ENVIRONMENTAL MONITORING
Pipeline Safety Enhancement Plan* | Southern California Gas Company | Ventura and Los Angeles Counties,
California | Lead Environmental Monitor
Jenny conducted environmental monitoring for several
gas pipeline replacement projects. She monitored
biological resources, storm water and air quality,
hazardous waste control, and cultural and archaeological resources, as well as performing water and
polychlorinated biphenyl sampling. She also conducted
pre-construction surveys, prepared project reports, and compliance monitoring documents.

Caltrans Bridge Replacement Project* | Santa Barbara,
California | Biologist
Jenny conducted the biological monitoring for two bridge replacements that required monitoring stream diversion
installation and removal. She performed aquatic species surveys, nesting bird surveys, and water diversion as well as general construction compliance monitoring.

Biological Monitoring, Line 63 Pipeline Replacement
Project | Plains All American Pipeline Company | Castaic, California | Biologist
Jenny conducted biological and restoration monitoring of a petroleum pipeline replacement within the Angeles
National Forest. She conducted sensitive species
clearance surveys prior to daily construction activities and monitored habitat restoration and Best Management
Practices (BMP) installation.

Plains All American Pipeline Drilling Project | Posey
Canyon, Angeles National Forest, California | Biologist Jenny provided biological resource monitoring, and
nesting bird and wildlife surveys for a drilling project in the Angeles National Forest.

Riparian Habitat Assessment, Line 63 Replacement
Project | Plains All American Pipeline Company (PAALP) | Santa Clara River, Los Angeles County, California |
Biologist
Jenny was approved by CDFW as a qualified biological
monitor and conducted environmental compliance
monitoring for installation of a pipeline through the Santa Clara River via Horizontal Directional Drilling (HDD).

During monitoring of construction activities Jenny also surveyed for potential frac- out during HDD operations.

Carpinteria Sanitary District, Carpinteria Creek Aquatic Species Surveys and Horizontal Direction Drilling (HDD) Monitoring | Carpinteria, California | Biologist
Jenny conducted pre-construction aquatic surveys within Carpinteria Creek for red-legged frog, southwestern pond turtle, tidewater goby, and two-striped garter snake. She also provided biological construction monitoring during HDD construction activities within the creek. Jenny
detected a frac-out and was able to prevent any frac-out material from entering Carpinteria Creek by promptly
alerting project personnel.

Phillips 66 Pipeline Biological Monitoring Project | Phillip 66 Pipeline LLC | Arroyo Grande, California | Biologist Jenny conducted environmental compliance monitoring
for a 5.6 mile pipeline project that crossed the Arroyo Grande Creek and an additional tributary. The project
entailed dewatering a 70- foot section of creek and
replacing a portion of pipeline underneath. Jenny also
conducted SWPPP inspections for the entire project.

* denotes projects completed with other firms

STREAM/RIVER RESTORATION
California State University Channel Islands, Restoration Monitoring* | Camarillo, California | Biologist
Jenny conducted quarterly and annual qualitative and
quantitative monitoring for a creek restoration site on CSUCI campus. She also prepared quarterly status
memos and annual restoration monitoring reports in
accordance with agency requirements.

Restoration Monitoring* | City of Santa Barbara | Santa Barbara, California | Biologist
Jenny performed quarterly and annual qualitative and
quantitative monitoring for two bridge projects over
Mission Creek. She prepared annual restoration
monitoring reports in accordance with agency
requirements.

BOTANICAL SURVEYS
California State University Channel Islands, Vegetation Mapping* | California State University Channel Islands | Camarillo, California | Biologist
Jenny conducted vegetation habitat mapping on CSUCI
campus and prepared survey results reports.

Oak Tree Inventory and Vegetation Mapping* |
Confidential | Castaic, California | Biologist
Jenny conducted oak tree inventories for several hundred trees and prepared vegetation habitat maps for three
adjacent parcels.

High Speed Rail Special-Status Floral Surveys* |
Tehachapi, California | Biologist
Jenny conducted focused, rare plant surveys for a portion of a high-speed rail project through Tehachapi.

NATURAL RESOURCE DAMAGE ASSESSMENT

AND OIL SPILL RESPONSE
Habitat Restoration Monitoring, Refugio Oil Spill | Plains All American Pipeline Company | Goleta, California |
Biologist
Jenny conducted restoration monitoring and assisted with habitat assessments at multiple sites along the California coast following spill cleanup response efforts.

ASBESTOS, LEAD BASED PAINT, AND

HAZARDOUS MATERIAL (MERCURY, PCB)

ASSESSMENTS
Asbestos and Lead Surveys | Hawaii | Environmental
Scientist
Jenny assisted with asbestos and lead surveys for
several multi-story buildings for a confidential client. The surveys included exterior and interior sampling, mapping, and reporting. Additionally, inventories of hazardous
materials were taken, including potential mercury and
PCB-containing materials.

Asbestos and Lead Surveys | Westlake and Thousand
Oaks, California | Environmental Scientist
Jenny assisted with asbestos and lead surveys for several shopping centers for a confidential client. The surveys included exterior and interior sampling, mapping, and
reporting. Additionally, inventories of hazardous materials were taken, including potential mercury and PCBcontaining materials.

PUBLICATIONS
A VanDwerwarker, J Alvarado, P Webb. Analysis and
Interpretation of Intrasite Variability in
Paleoethnobotanical Remains: A Consideration and
Application of Methods at the Ravensford Site, North
Carolina. In: Method and Theory in Paleoethnobotany.,
2014.

Kyle D. Emerson PG, CEG
Managing Principal Geologist
* denotes projects completed with other firms
Kyle has more than 28 years of professional experience—17 of those years with Stantec—providing geotechnical and environmental consulting. During the course of his experience, he has been involved with a wide variety of geological and engineering projects. He has been in direct charge of quality control/quality assurance (QA/QC) work for Stantec and previous firms for geological, engineering geological, and environmental services primarily in California. Additionally, Kyle has been a primary contact for Stantec with many different clients (including multi-party actions) and regulatory bodies involving contracting, workplan approvals, site assessments and closures, permitting, remedial action, and litigation support. With regard to litigation services, Kyle has extensive experience providing expert witness testimony, second-party review, and litigation support and analysis.

Kyle's extensive experience includes assessment and remediation of property-specific and regional issues involving soil and groundwater contaminated with petroleum hydrocarbons, chlorinated solvents, heavy metals, pesticides, and PCBs.

He currently serves as the managing principal geologist in Stantec's Redlands, California office.

EDUCATION
Engineering Geology/Hydrogeology, California
State University, Los Angeles, California, 1984
AS, General Science, Crafton Hills College,
Yucaipa, California, 1975
BS, Geological Sciences, California State
University, Long Beach, California, 1982

REGISTRATIONS
Certified Engineering Geologist #1271, State of
California Issued 1985, Expires 2011
Professional Geologist #4066, State of California
Issued 1985, Expires 2011

PROJECT EXPERIENCE
Bioremediation
Excavation and Treatment of PetroleumContaminated Soil Kyle designed the excavation and treatment of
45,000 cubic yards of petroleum-contaminated
soil. Soil treatment included utilizing vapor
extraction, combined with bioremediation.

Kyle D. Emerson PG, CEG
Managing Principal Geologist
* denotes projects completed with other firms
Chemicals & Polymers
Two Former Chemical Plants, Environmental Site
Assessments and Remediation, Vernon, California
Mr. Emerson was part of the team for conducting
Phase I and Phase II Environmental Site
Assessments (ESA) and developing remedial
action plans for two former chemical plant sites
with 80-year industrial histories. Phase I ESAs
used historical files, maps, aerial photographs,
available documents, and data from public
agencies and historical directories for identifying
recognized environmental concerns. Extensive
Phase II ESA survey activities aided in identifying
below-grade structures such as vaults/USTs, as
well as assessing the extent of influence and
nature of the contamination. These investigations
confirmed the presence of heavy metals,
petroleum hydrocarbons, volatile organic
compounds, polychlorinated biphenyls, radioactive
materials, semi-volatile organic compounds, and
polycyclic aromatic compounds in the soils for
these sites. Specific areas of concern included
former settling ponds, a bone yard, maintenance
areas, transformer and substations, wastewater
treatment facilities, and above-ground storage
tank farms. A conceptual mode was developed for
use in a health risk assessment and developed
risk-based corrective actions to address potential
health and environmental concerns. He assisted
with the development and implementation of a
remedial action plan, combined administrative
controls, engineering controls, and active
remediation; this resulted in the cost-effective
return of one site to active use, and is reducing
health risks to occupants and the public at the
second site.

CONFIDENTIAL: Aerospace Adhesives and
Coatings Plant, Glendale, California
Mr. Emerson was part of the team that conducted
feasibility studies to evaluate remedial alternatives
for remediation of chlorinated VOCs, 1,4 dioxane,
and hexavalent chromium (CrVI) in soil, soil vapor,
and groundwater. Feasibility studies included
groundwater pump testing, benchscale column
testing to evaluate in situ alternatives for reducing
CrVI to the less mobile CrIII valence state, soil
vapor extraction, capping, and excavation. Field
pilot studies were performed to evaluate the
efficiency of various CrVI reductants including the
use of ferrous sulfate, calcium polysulfide,
emulsified oil, and fructose. Extensive multi-depth
soil vapor testing was conducted to evaluate the
distribution of VOCs in the subsurface and to
support vapor intrusion risk assessment.

Feasibility studies were completed in 2008.

Remedial actions are expected to be completed in
2011.

Condition Assessments
Assessment and Mitigation of Manufacturing
Facility
Kyle managed the assessment and mitigation of
an ammunition manufacturing facility covering
1,100 acres in a complex geologic environment.

The contaminates involved red and white
phosphorous, TNT, chlorinated solvents, solid
wastes, and live ordinance.

Soil Contamination Assessment Supervision and
Management
Kyle managed and supervised soil contamination
assessment and in-situ remediation of heavy
metals involving chromium, cadmium, nickel and
zinc by chemical fixation to depths in excess of 40
feet below ground surface beneath existing
structures within several manufacturing facilities.

Kyle D. Emerson PG, CEG
Managing Principal Geologist
* denotes projects completed with other firms
Litigation Support and Expert Testimony
Kyle provided litigation support and expert
testimony on more than 20 separate projects
involving service stations, chlorinated solvent
cases, heavy metal, and semi-volatile releases.

Corporate / Office
Commercial Developer - Environmental
Remediation of Former Dry Cleaners, El Centro,
California
Mr. Emerson was responsible for assessments
and remediation at this former dry cleaners which
released the dry cleaning chemical
tetrachloroethene (PCE) to the ground and
underlying groundwater. The work included initial
site assessment, agency interaction and
negotiations with the California Regional Water
Quality Control Board (CRWQCB), and Colorado
Basin Region human health risk assessment
(HHRA), design and implementation of remedial
investigations, feasibility studies, remedial action
plans, and implementation of remediation in
mitigating chlorinated solvent contamination in
vadose and saturated zones at concentrations
indicative of DNAPL. The results of the completed
remediation, as well as continued confirmation
sampling and monitoring, allowed the CRWQCB to
issue site closure in 2008. The site has since been
redeveloped into a new commercial development.

Environmental Assessments
Siting Studies
Kyle performed initial siting studies for potential
Class I, II, and III landfills. The project included
detailed geologic mapping, hydrogeological
studies, and permeability studies of caps and
liners.

Environmental Site Remediation
Assessment and Remedial Design, California
(Project Supervisor)
Kyle supervised the assessment and remedial
design of a system to eliminate salt brine
contamination in shallow perched water horizons
in the Yucaipa, San Bernardino, and Riverside
areas of southern California.

Design and Installation of Recovery Systems*
Kyle designed and installed numerous freeproduct recovery systems that successfully recovered product. One of the sites contained
product up to 11-feet thick covering more than
three city blocks. The dissolved phase had
affected a multi-aquifer system and a public
drinking water system.

Geophysical Characterizations*
Kyle performed and supervised numerous
geophysical characterizations to determine the
extent of old landfills. He provided classification
studies, landfill gas monitoring, removal
verification during grading, methane collection and
mitigation plans, permitting, and closure plans.

Domestic Landfill Development*
Kyle designed and supervised the dynamic
consolidation of a domestic landfill for
development. He used this process to minimize
expected settlement to overlying structures. Kyle
designed commercial developments on closed
landfills that involved complex methane collection
and monitoring systems and building settlement
controls.

Kyle D. Emerson PG, CEG
Managing Principal Geologist
* denotes projects completed with other firms
Clay Borrow Site Studies
Kyle performed more than 10 separate clay
borrow site studies for determining sources of
material to cap landfills; ranged from a 20-acre dry
lakebed to a 450-acre parcel in complex folded
marine sediments.

Assessment, Clean Up, and Regulatory Support
Management, Santa, Monica (Project Manager)
Kyle managed the assessment, clean up, and
complex regulatory support of a PRP site in an
MTBE case (Charnock subbasin). His work
involved more than 20 environmental
professionals working full time for two years to
complete the assessment and clean up mandated
by the regulatory agencies.

Hazardous Waste
San Gabriel Valley Superfund Site, Remediation &
Closure of Multiple Source Areas, Industry,
California
Mr. Emerson performed feasibility studies to
evaluate appropriate and relevant remedial
alternatives to mitigate constituents of concern in
five AOCs contaminated with chlorinated
hydrocarbons, heavy metals, petroleum fuel, and
cutting oils. Ultimately, a combination of remedial
alternatives was implemented that included largediameter auger excavation to 45 feet to minimize impacts on facility operations, vapor extraction,
vapor intrusion risk assessment, deed restriction,
and monitored natural attenuation. At the
completion of remedial actions, confirmation soil,
soil vapor, and groundwater sampling were
conducted and followed with risk assessment to
demonstrate that remedial objectives had been
achieved. No further action was recently granted
by the US EPA and Los Angeles Regional Water
Quality Control Board.

Mixed-Use
Port of San Diego Rohr Facility, Chula Vista,
California
Mr. Emerson assisted in a detailed subsurface
assessment of the Rohr facility. The intent of the
assessment was to evaluate the 40-acre former
aircraft part manufacturing facility for acquisition
by the Port of San Diego for redevelopment into a
business park and entertainment complex. The
assessment identified the presence of soil, soil
vapor, and groundwater impacts by petroleum
hydrocarbons, VOCs, heavy metals, PCBs, and
semi-volatile organic compounds. He utilized
many sampling techniques to assess the limits
and concentrations of contaminants in the
subsurface. Ultimately, the team was able to
develop a cost estimate for potential remedial
action cost associated to corrective action to allow
redevelopment.

Master Planned Commercial/Residential
Redevelopment Project, Whittier, California
(Project Manager)
Kyle oversaw the assessment of 26 contiguous
properties that are part of a 21-acre master
planned commercial/residential redevelopment
project. The properties included industrial facilities, platting lines, fuel USTs, and metal processing
plants, among others. The estimated cleanup
costs are approximately $2 million.

Kyle D. Emerson PG, CEG
Managing Principal Geologist
* denotes projects completed with other firms
Multi-Unit / Family Residential
Residential Development Assessment, Ventura,
California (Project Director)
Kyle directed an assessment of a 40-acre former
agricultural property proposed for residential
development. Pesticides were identified above
hazardous waste levels and preliminary
remediation goals established by the U.S.

Environmental Protection Agency. Through
corrective grading methods and onsite placement
of the pesticide impacted soils, all material were
re-used on site without offsite disposal. The over
all cost savings for the client was more than $1
million. Total cost was less than $250,000 for all
necessary activities.

Oil & Gas
Oil Field Site Assessments*
Kyle performed site assessments at oil field leases
involving refineries, bulk storage areas, piping
systems and wellhead, and drilling mud pit
contamination.

Environmental Protection Agency Superfund
Action, Culver City, California (Project Manager)
Kyle served as the project manager representing a
major oil company in the assessment, remedial
action, and litigation support in a multi-party
contamination case affecting a City water supply.

The assessment involved more than 250
continuous core borings up to 100 feet, as well as
extensive remedial actions. The total cost for all
related activities was $22 million. The case is
settled and the closure of the site is pending.

Project Management
Liability and Property Management Consulting
Services
Kyle is providing liability and property
management consulting services to more than 10
medium to large property development firms in the
US. His work involves property transaction
assessments, contract review, acquisition
guideline development, liability management
evaluation, insurance acquisition, and strategic
planning.

Residential Development
Environmental Development Management and
Review (Project Manager)
Kyle manages and reviews environmental
development issues for a large residential
developer specializing in development of
contaminated industrial properties by providing
innovative solutions in developing contaminated
properties for residential use through risk
assessment, engineering, and administrative and
property development controls.

Site Management and Remediation
Design and Implementation of Biodegradation
Programs*, California
Kyle designed and implemented one of the first insitu biodegradation programs in California; it involved 50,000 cubic yards of dieselcontaminated soils, and groundwater to depths of 70 feet below ground surface.

Kyle D. Emerson PG, CEG
Managing Principal Geologist
* denotes projects completed with other firms
Soil and Groundwater Remediation Systems
Soil and Groundwater Contamination
Assessments and Mitigation*, California (Project
Manager)
Kyle managed numerous chlorinated solvent soil
and groundwater contamination assessments and
mitigation programs in southern California. The
projects involved releases that impacted soil and
groundwater to depth of groundwater more than
700 feet in multi-aquifer systems. One case
involved with plume dimensions more than 1 mile
from the source affecting residential properties.

Soil and Groundwater Assessment and
Remediation Programs*
Implemented hundreds of soil and groundwater
assessment and remediation programs at various
service station facilities in Southern and Northern
California, and Nevada. Work involved
assessment, remedial design, installation,
maintenance and monitoring. Closure has been
received on a majority of these sites.

Assessment and Remediation Management*
Kyle managed the assessment and remediation of
soil and groundwater manufacturing at dry
cleaning facilities contaminated with chlorinated
solvents.

Warehouse / Light Industrial
Glendale Redevelopment Project, Glendale,
California (Project Manager)
Kyle managed the assessment and remedial
actions during the redevelopment of and industrial
property. The project involved the demolition of a
historic manufacturing facility and a commercial
dry cleaner. Each of these facilities were
associated with releases of solvents and
petroleum hydrocarbons. Remedial actions
involved excavation by pattern drilling and off site
disposal along with removal of former USTs. The
total cost of remediation and assessment was
$450,000.00.

Compton Redevelopment Project, Compton,
California (Project Manager)
Kyle is serving as project manager for the
assessment and remedial actions for a large
redevelopment project. The project involves the
redevelopment of a historic manufacturing facility
and a former dry cleaner. Each of these facilities
were associated with releases of solvents and
petroleum hydrocarbons. The industrial facility was
also associated with significant volumes of buried
waste that required removal and disposal. These
wastes also included the chemical referenced
above, as well as PCBs and heavy metals.

Remediation has included excavation, vapor
extraction, and chemical fixation. The total cost of
this project has been $2.8 million to date.

Kyle D. Emerson PG, CEG
Managing Principal Geologist

PUBLICATIONS
In-Situ Bioremediation of an Underground Diesel
Fuel Spill: A Case Study. Environmental
Management, 1989.

APPENDIX C

USER-PROVIDED RECORDS

C:\Users\bret\Desktop\Eastvale - Hellman\Phase I\Phase I ESA User Questionnaire_Eastvale_Hellman.doc Stantec Consulting Services, Inc
PHASE I ESA USER’S QUESTIONNAIRE
In order to qualify for protection from land owner liability under CERCLA as an innocent landowner, bona fide prospective purchaser, or contiguous property owner, ASTM standard practice E1527-21 and the federal AAI rule (40 CFR 312) require that the User of the Phase I ESA report provide certain information (if available) to the Environmental Professional completing the assessment.

Failure to provide this information could result in a determination that “all appropriate inquiry” is not complete. Information that is not or cannot be provided to the Environmental Professional may be identified as a “data gap” in the Phase I ESA report.

Please answer the following questions as completely as possible. Attach additional pages as needed. Return the completed questionnaire to Stantec along with the executed Authorization For services form.

1. Property Information
Property Name: Eastvale - Hellman
Property Address(es): APN - 144-070-016, 144-070-017,, 144-070-018 and 144- 070-020
City: Eastvale State CA Zip 92880
Property Owner Name: Eastvale Ventures Inc., A California Corporation Property Owner Phone #: 909-319-6165

2. Contact For Site Access
Name: Bret Ilich
Company/Organization/Title: Warmington Residential – Director of Forward Planning Phone # 909-489-2113 E-Mail Address: [email protected]

3. Environmental Cleanup Liens. Are you aware of any environmental cleanup liens against the property that are filed or recorded under federal, tribal, state or local law? __________ Yes X__________ No
If yes, describe or attach details of the lien

4. Activity and Land Use Limitations. Are you aware of any activity and use limitations, such as engineering controls, land use restrictions, or institutional controls that are in place at the property and/or have been filed or recorded as applicable to the property as a result of environmental contamination, investigation, cleanup, or related matters? __________ Yes X__________ No
If yes, describe or attach details of the limitations
Zoho Sign Document ID: 2CB37C38-2GZZQED-Y9TDFZRW_ITC6J4PDIXQWQIQPX7HD8DJNJU

5. Specialized Knowledge or Experience. As the User of this ESA, do you have any specialized knowledge or experience related to the property or nearby properties? For example, are you involved in the same line of business as the current or former occupants of the property or an adjoining property, such that you would have specialized knowledge about chemicals and processes used by this type of business?
__________ Yes X__________ No
If yes, describe or attach details of your specialized knowledge or experience

6. Relationship of Purchase Price to Fair Market Value of Property. Does the purchase price being paid for the property reasonably reflect the fair market value? X Yes No
Not applicable. User is not involved in a purchase of the property.

If you conclude that there is a difference, do you have any reason to believe that the reduced purchase price may be related to contamination known or believed to be present at the property?
Yes, I have reason to believe that the purchase price for the property has been reduced in comparison with the fair market value due to contamination known or believed to be present at the property.

No, I have no reason to believe that the purchase price for the property has been reduced in comparison with the fair market value due to contamination known or believed to be present at the property.

7. Commonly Known or Reasonably Ascertainable Information. Are you aware of commonly known or reasonably ascertainable information about the property that would help the Environmental Professional to identify conditions indicative of releases or threatened releases of hazardous substances or petroleum products? For example:

Do you know the past uses of the property?
Yes (describe)
X No
Do you know of chemicals, hazardous substances or petroleum products that are present or once were present at the property?
Yes (describe)
X No
Zoho Sign Document ID: 2CB37C38-2GZZQED-Y9TDFZRW_ITC6J4PDIXQWQIQPX7HD8DJNJU

Do you know of spills or other releases of chemicals, hazardous substances or petroleum products that have taken place at the property? Yes (describe)
X No
Do you know of any environmental cleanups that have taken place at the property? Yes (describe)
X No

8. The Degree of Obviousness of Contamination. E1527-21 and the federal AAI rule (40 CFR 312.31) require that the Phase I ESA consider the degree of obviousness of the presence or likely presence of contamination at the property, and the ability to detect the contamination by appropriate investigation. Based on your knowledge and experience related to the property, are there any obvious indictors that point to the presence or likely presence of contamination at the property?
Yes (describe)
X No

9. Availability of Previous Environmental Reports. Are you aware of previous environmental site assessment reports, other environmental reports, documents, correspondence, etc. concerning the property and its environmental condition? Yes (describe)
X No
Signature:

Name (printed): Bret Ilich
Title: Director of Forward Planning
Date: 4/22/25
Zoho Sign Document ID: 2CB37C38-2GZZQED-Y9TDFZRW_ITC6J4PDIXQWQIQPX7HD8DJNJU

CLTA Preliminary Report Form Order Number: RCO-7238657
(Rev. 11/06) Page Number: 1
First American Title

First American Title Company
1250 Corona Pointe Court, Suite 200
Corona, CA 92879
California Department of Insurance License No. 2549-4
Title Officer: Ryan Achterberg
Phone: (949)299-4950
Fax No.: (714)824-5946
E-Mail: [email protected]
E-Mail Loan Documents to: Lenders please contact the Escrow Officer for email address for sending loan documents.

Property: APN - 144-070-016, 144-070-017,, 144-070-018 and 144- 070-020
Eastvale, CA

PRELIMINARY REPORT
In response to the above referenced application for a policy of title insurance, this company hereby reports that it is prepared to issue, or cause to be issued, as of the date hereof, a Policy or Policies of Title Insurance describing the land and the estate or interest therein hereinafter set forth, insuring against loss which may be sustained by reason of any defect, lien or encumbrance not shown or referred to as an Exception below or not excluded from coverage pursuant to the printed Schedules, Conditions and Stipulations of said Policy forms.

The printed Exceptions and Exclusions from the coverage and Limitations on Covered Risks of said policy or policies are set forth in Exhibit A attached. The policy to be issued may contain an arbitration clause. When the Amount of Insurance is less than that set forth in the arbitration clause, all arbitrable matters shall be arbitrated at the option of either the Company or the Insured as the exclusive remedy of the parties. Limitations on Covered Risks applicable to the CLTA and ALTA Homeowner's Policies of Title Insurance which establish a Deductible Amount and a Maximum Dollar Limit of Liability for certain coverages are also set forth in Exhibit A. Copies of the policy forms should be read. They are available from the office which issued this report.

Please read the exceptions shown or referred to below and the exceptions and exclusions set forth in Exhibit A of this report carefully. The exceptions and exclusions are meant to provide you with notice of matters which are not covered under the terms of the title insurance policy and should be carefully considered.

It is important to note that this preliminary report is not a written representation as to the condition of title and may not list all liens, defects, and encumbrances affecting title to the land.

Please be advised that any provision contained in this document, or in a document that is attached, linked or referenced in this document, that under applicable law illegally discriminates against a class of individuals based upon personal characteristics such as race, color, religion, sex, sexual orientation, gender identity, familial status, disability, national origin, or any other legally protected class, is illegal and unenforceable by law.

This report (and any supplements or amendments hereto) is issued solely for the purpose of facilitating the issuance of a policy of title insurance and no liability is assumed hereby. If it is desired that liability be assumed prior to the issuance of a policy of title insurance, a Binder or Commitment should be requested.

Order Number: RCO-7238657
Page Number: 2
First American Title

Dated as of February 28, 2025 at 7:30 A.M.

The form of Policy of title insurance contemplated by this report is:

To Be Determined
A specific request should be made if another form or additional coverage is desired.

Title to said estate or interest at the date hereof is vested in:

EASTVALE VENTURES INC., A CALIFORNIA CORPORATION, SUBJECT TO EXCEPTION NO. 17 The estate or interest in the land hereinafter described or referred to covered by this Report is:

Fee
The Land referred to herein is described as follows:
(See attached Legal Description)
At the date hereof exceptions to coverage in addition to the printed Exceptions and Exclusions in said policy form would be as follows:

1. General and special taxes and assessments for the fiscal year 2025-2026, a lien not yet due or payable.

2. General and special taxes and assessments for the fiscal year 2024-2025.

First Installment: $2,947.60, PAID
Penalty: $0.00
Second Installment: $2,947.60, OPEN
Penalty: $0.00
Tax Rate Area: 027-002
A. P. No.: 144-070-016
(Affects Parcel 1)

3. General and special taxes and assessments for the fiscal year 2024-2025.

First Installment: $2,947.60, PAID
Penalty: $0.00
Second Installment: $2,947.60, OPEN
Penalty: $0.00
Tax Rate Area: 027-002
A. P. No.: 144-070-017

Order Number: RCO-7238657
Page Number: 3
First American Title

(Affects Parcel 2)

4. General and special taxes and assessments for the fiscal year 2024-2025.

First Installment: $1,770.41, PAID
Penalty: $0.00
Second Installment: $1,770.41, OPEN
Penalty: $0.00
Tax Rate Area: 027-002
A. P. No.: 144-070-018
(Affects Portion of Parcel 3)

5. General and special taxes and assessments for the fiscal year 2024-2025.

First Installment: $2,947.60, PAID
Penalty: $0.00
Second Installment: $2,947.60, OPEN
Penalty: $0.00
Tax Rate Area: 027-002
A. P. No.: 144-070-020
(Affects Portion of Parcel 4 and Portion of Lot E)

6. The lien of defaulted taxes for the fiscal year 2020-2021, and any subsequent delinquencies.

Tax Rate Area: 027-002
A. P. No.: 144-070-016
Amount to redeem: $11,082.96
Valid through: March 2025
Amount to redeem: $11,190.06
Valid through: April 2025
Please contact the tax office to verify the payoff amount. (Affects Parcel 1)

7. The lien of defaulted taxes for the fiscal year 2020-2021, and any subsequent delinquencies.

Tax Rate Area: 027-002
A. P. No.: 144-070-017
Amount to redeem: $11,082.95
Valid through: March 2025
Amount to redeem: $11,190.05
Valid through: April 2025
Please contact the tax office to verify the payoff amount. (Affects Parcel 2)

8. The lien of defaulted taxes for the fiscal year 2020-2021, and any subsequent delinquencies.

Tax Rate Area: 027-002
A. P. No.: 144-070-018
Amount to redeem: $6,781.71

Order Number: RCO-7238657
Page Number: 4
First American Title

Valid through: March 2025
Amount to redeem: $6,846.60
Valid through: April 2025
Please contact the tax office to verify the payoff amount. (Affects Portion of Parcel 3)

9. The lien of defaulted taxes for the fiscal year 2020-2021, and any subsequent delinquencies.

Tax Rate Area: 027-002
A. P. No.: 144-070-020
Amount to redeem: $10,803.21
Valid through: March 2025
Amount to redeem: $10,907.84
Valid through: April 2025
Please contact the tax office to verify the payoff amount. (Affects Portion of Parcel 4 and Portion of Lot E)

10. The lien of supplemental taxes, if any, assessed pursuant to Chapter 3.5 commencing with Section 75 of the California Revenue and Taxation Code.

11. An easement for roads, railroads and ditches, drainage ditches and incidental purposes, recorded July 30, 1915 in Book 425 of Deeds, Page 365.

In Favor of: Locust Grove Farms Co.

Affects: Parcel 1

12. An easement for ditches, canals or pipelines and incidental purposes, recorded in Book 104 of Deeds, Page 322 and by deeds recorded July 24, 1897 in Book 31 Page 337, March 2, 1899 in Book 69 Page 250, April 10, 1902 in Book 142, Page 101, January 8, 1906 in Book 216 Page 4, all of Deeds.

In Favor of: Stearns Rancho Company and the Jurupa Land and Water Company, their successors or assigns
Affects: As described therein
The location of the easement cannot be determined from record information.

13. An easement for ditches and incidental purposes, recorded August 20, 1929 in Book 824 of Deeds,

In Favor of: John George Dean, et al
Affects: As described therein
The location of the easement cannot be determined from record information.

14. An easement shown or dedicated on the Map as referred to in the legal description For: Street, Public Utility and incidental purposes.
(Affects Portion of Lot E)

Order Number: RCO-7238657
Page Number: 5
First American Title

15. The effect of a recital on said parcel map which states that all new dwelling units shall be floodproofed by elevating the finished floor a minimum of 18 inches above adjacent ground surface.

Erosion protection shall be provided for mobile home supports.

16. A notice of assessment recorded June 10, 1991 as Instrument No. 193749 of Official Records, executed by Board of Supervisors of the Riverside County Flood Control and Water Conservation District.

17. The effect of a document entitled "GRANT DEED", recorded January 21, 2021 as INSTRUMENT NO. 2021-0042011 of Official Records.

THE REQUIREMENT THE DOCUMENT IS RE-RECORDED TO INCLUDE A COMPLETE AND CORRECT LEGAL DESCRIPTION.

18. Rights of the public in and to that portion of the Land lying within any Road, Street, Alley or Highway. (Affects Parcel 1 and Portion of Lot E)

19. Water rights, claims or title to water, whether or not shown by the Public Records.

20. Rights of parties in possession.

21. Any facts, rights, interests or claims which would be disclosed by a correct ALTA/NSPS survey.

Prior to the issuance of any policy of title insurance, the Company will require:

22. Authority documents for all parties executing documents including the following:

With respect to EASTVALE VENTURES INC., A CALIFORNIA CORPORATION: Evidence that the corporation is properly formed and in good standing in the state of its domicile. An official copy of the bylaws for the corporation. A copy of a resolution of the Board of Directors authorizing the contemplated transaction and designating which corporate officers shall have the power to execute on behalf of the corporation. Other requirements which the Company may impose following its review of the material required herein and other information which the Company may require.

23. An ALTA/NSPS survey of recent date which complies with the current minimum standard detail requirements for ALTA/NSPS land title surveys.

Order Number: RCO-7238657
Page Number: 6
First American Title

INFORMATIONAL NOTES
Note: The policy to be issued may contain an arbitration clause. When the Amount of Insurance is less than the certain dollar amount set forth in any applicable arbitration clause, all arbitrable matters shall be arbitrated at the option of either the Company or the Insured as the exclusive remedy of the parties. If you desire to review the terms of the policy, including any arbitration clause that may be included, contact the office that issued this Commitment or Report to obtain a sample of the policy jacket for the policy that is to be issued in connection with your transaction.

1. Supplemental taxes for the year 2020-2021 assessed pursuant to Chapter 3.5 commencing with Section 75 of the California Revenue and Taxation Code.

First Installment: $1,012.51, PAID
Penalty: $0.00
Second Installment: $1,012.51, PAID
Penalty: $0.00
Tax Rate Area: 027-002
A. P. No.: 144-070-016
(Affects Parcel 1)

2. Supplemental taxes for the year 2020-2021 assessed pursuant to Chapter 3.5 commencing with Section 75 of the California Revenue and Taxation Code.

First Installment: $1,012.51, PAID
Penalty: $0.00
Second Installment: $1,012.51, PAID
Penalty: $0.00
Tax Rate Area: 027-002
A. P. No.: 144-070-017
(Affects Parcel 2)

3. Supplemental taxes for the year 2020-2021 assessed pursuant to Chapter 3.5 commencing with Section 75 of the California Revenue and Taxation Code.

First Installment: $598.87, PAID
Penalty: $0.00
Second Installment: $598.87, PAID
Penalty: $0.00
Tax Rate Area: 027-002
A. P. No.: 144-070-018
(Affects Portion of Parcel 3)

4. Supplemental taxes for the year 2020-2021 assessed pursuant to Chapter 3.5 commencing with Section 75 of the California Revenue and Taxation Code.

First Installment: $1,052.82, PAID
Penalty: $0.00
Second Installment: $1,158.07, PAID
Penalty: $0.00
Tax Rate Area: 027-002

Order Number: RCO-7238657
Page Number: 7
First American Title

A. P. No.: 144-070-020
(Affects Portion of Parcel 4 and Portion of Lot E)

5. The property covered by this report is vacant land.

6. According to the public records, there has been no conveyance of the land within a period of twentyfour months prior to the date of this report, except as follows:

None

7. We find no outstanding voluntary liens of record affecting subject property. Disclosure should be made concerning the existence of any unrecorded lien or other indebtedness which could give rise to any possible security interest in the subject property.

The map attached, if any, may or may not be a survey of the land depicted hereon. First American expressly disclaims any liability for loss or damage which may result from reliance on this map except to the extent coverage for such loss or damage is expressly provided by the terms and provisions of the title insurance policy, if any, to which this map is attached.

Order Number: RCO-7238657
Page Number: 8
First American Title

LEGAL DESCRIPTION
Real property in the City of Eastvale, County of Riverside, State of California, described as follows:

Parcels 1 and 2 of PARCEL MAP NO. 10,378 on file in Book 47 Page 19 of Parcel Maps, of Official Records of Riverside County, California, together with the Easterly 214.00 feet of Parcels 3, 4 and Lot E of said PARCEL MAP NO. 10,378.

APN: 144-070-016 (Parcel 1); 144-070-017 (Parcel 2); 144-070-018 (Portion of Parcel 3) and 144-070- 020 (Portion of Parcel 4 and Portion of Lot E)

Order Number: RCO-7238657
Page Number: 9
First American Title

Order Number: RCO-7238657
Page Number: 10
First American Title

NOTICE
Section 12413.1 of the California Insurance Code, effective January 1, 1990, requires that any title insurance company, underwritten title company, or controlled escrow company handling funds in an escrow or subescrow capacity, wait a specified number of days after depositing funds, before recording any documents in connection with the transaction or disbursing funds. This statute allows for funds deposited by wire transfer to be disbursed the same day as deposit. In the case of cashier's checks or certified checks, funds may be disbursed the next day after deposit. In order to avoid unnecessary delays of three to seven days, or more, please use wire transfer, cashier's checks, or certified checks whenever possible.

Order Number: RCO-7238657
Page Number: 11
First American Title

EXHIBIT A

LIST OF PRINTED EXCEPTIONS AND EXCLUSIONS (BY POLICY TYPE) CLTA/ALTA HOMEOWNER'S POLICY OF TITLE INSURANCE [(07-01-2021) v. 01.00]

EXCLUSIONS FROM COVERAGE
The following matters are excluded from the coverage of this policy and We will not pay loss or damage, costs, attorneys' fees, or expenses that arise by reason of:

1. a. any law, ordinance, permit, or governmental regulation (including those relating to building and zoning) that restricts, regulates, prohibits, or relates to:
i. the occupancy, use, or enjoyment of the Land;
ii. the character, dimensions, or location of any improvement on the Land; iii. the subdivision of land; or
iv. environmental remediation or protection.
b. any governmental forfeiture, police, or regulatory, or national security power. c. the effect of a violation or enforcement of any matter excluded under Exclusion 1.a. or 1.b.

Exclusion 1 does not modify or limit the coverage provided under Covered Risk 8.a., 14, 15, 16, 18, 19, 20, 23, or 27.

2. Any power to take the Land by condemnation. Exclusion 2 does not modify or limit the coverage provided under Covered Risk 17.

3. Any defect, lien, encumbrance, adverse claim, or other matter:
a. created, suffered, assumed, or agreed to by You;
b. not Known to Us, not recorded in the Public Records at the Date of Policy, but Known to You and not disclosed in writing to Us by You prior to the date You became an Insured under this policy; c. resulting in no loss or damage to You;
d. attaching or created subsequent to the Date of Policy (Exclusion 3.d. does not modify or limit the coverage provided under Covered Risk 5, 8.f., 25, 26, 27, 28, or 32); or
e. resulting in loss or damage that would not have been sustained if You paid consideration sufficient to qualify You as a bona fide purchaser of the Title at the Date of Policy.

4. Lack of a right:
a. to any land outside the area specifically described and referred to in Item 3 of Schedule A; and b. in any street, road, avenue, alley, lane, right-of-way, body of water, or waterway that abut the Land.

Exclusion 4 does not modify or limit the coverage provided under Covered Risk 11 or 21.

5. The failure of Your existing structures, or any portion of Your existing structures, to have been constructed before, on, or after the Date of Policy in accordance with applicable building codes. Exclusion 5 does not modify or limit the coverage provided under Covered Risk 14 or 15.

6. Any claim, by reason of the operation of federal bankruptcy, state insolvency, or similar creditors’ rights law, that the transfer of the Title to You is a:
a. fraudulent conveyance or fraudulent transfer;
b. voidable transfer under the Uniform Voidable Transactions Act; or c. preferential transfer:
i. to the extent the instrument of transfer vesting the Title as shown in Schedule A is not a transfer made as a contemporaneous exchange for new value; or
ii. for any other reason not stated in Covered Risk 30.

7. Contamination, explosion, fire, flooding, vibration, fracturing, earthquake, or subsidence.

8. Negligence by a person or an entity exercising a right to extract or develop oil, gas, minerals, groundwater, or any other subsurface substance.

9. Any lien on Your Title for real estate taxes or assessments imposed or collected by a governmental authority that becomes due and payable after the Date of Policy. Exclusion 9 does not modify or limit the coverage provided under Covered Risk 8.a. or 27.

10. Any discrepancy in the quantity of the area, square footage, or acreage of the Land or of any improvement to the Land.

LIMITATIONS ON COVERED RISKS
Your insurance for the following Covered Risks is limited on the Owner’s Coverage Statement as follows:

For Covered Risk 16, 18, 19, and 21 Your Deductible Amount and Our Maximum Dollar Limit of Liability shown in Schedule A.

The deductible amounts and maximum dollar limits shown on Schedule A are as follows:

Your Deductible Amount Our Maximum Dollar Limit of Liability Covered Risk 16: 1% of Policy Amount Shown in Schedule A or $2,500 $10,000 (whichever is less)
Covered Risk 18: 1% of Policy Amount Shown in Schedule A or $5,000 $25,000 (whichever is less)
Covered Risk 19: 1% of Policy Amount Shown on Schedule A or $5,000 $25,000 (whichever is less)
Covered Risk 21: 1% of Policy Amount Shown on Schedule A or $2,500 $5,000 (whichever is less)

Order Number: RCO-7238657
Page Number: 12
First American Title

ALTA OWNER'S POLICY [(07-01-2021) V. 01.00]
CLTA STANDARD COVERAGE OWNER'S POLICY [(02-04-22) V. 01.00]

EXCLUSIONS FROM COVERAGE
The following matters are excluded from the coverage of this policy, and the Company will not pay loss or damage, costs, attorneys’ fees, or expenses that arise by reason of:

1. a. any law, ordinance, permit, or governmental regulation (including those relating to building and zoning) that restricts, regulates, prohibits, or relates to:
i. the occupancy, use, or enjoyment of the Land;
ii. the character, dimensions, or location of any improvement on the Land; iii. the subdivision of land; or
iv. environmental remediation or protection.
b. any governmental forfeiture, police, regulatory, or national security power. c. the effect of a violation or enforcement of any matter excluded under Exclusion 1.a. or 1.b.

Exclusion 1 does not modify or limit the coverage provided under Covered Risk 5 or 6.

2. Any power of eminent domain. Exclusion 2 does not modify or limit the coverage provided under Covered Risk 7.

3. Any defect, lien, encumbrance, adverse claim, or other matter:
a. created, suffered, assumed, or agreed to by the Insured Claimant; b. not Known to the Company, not recorded in the Public Records at the Date of Policy, but Known to the Insured Claimant and not disclosed in writing to the Company by the Insured Claimant prior to the date the Insured Claimant became an Insured under this policy;
c. resulting in no loss or damage to the Insured Claimant; d. attaching or created subsequent to the Date of Policy (Exclusion 3.d. does not modify or limit the coverage provided under Covered Risk 9 or 10); or
e. resulting in loss or damage that would not have been sustained if consideration sufficient to qualify the Insured named in Schedule A as a bona fide purchaser had been given for the Title at the Date of Policy.

4. Any claim, by reason of the operation of federal bankruptcy, state insolvency, or similar creditors’ rights law, that the transaction vesting the Title as shown in Schedule A is a:
a. fraudulent conveyance or fraudulent transfer;
b. voidable transfer under the Uniform Voidable Transactions Act; or c. preferential transfer:
i. to the extent the instrument of transfer vesting the Title as shown in Schedule A is not a transfer made as a contemporaneous exchange for new value; or
ii. for any other reason not stated in Covered Risk 9.b.

5. Any claim of a PACA-PSA Trust. Exclusion 5 does not modify or limit the coverage provided under Covered Risk 8.

6. Any lien on the Title for real estate taxes or assessments imposed or collected by a governmental authority that becomes due and payable after the Date of Policy. Exclusion 6 does not modify or limit the coverage provided under Covered Risk 2.b.

7. Any discrepancy in the quantity of the area, square footage, or acreage of the Land or of any improvement to the Land.

NOTE: The 2021 ALTA Owner’s Policy may be issued to afford either Standard Coverage or Extended Coverage. In addition to variable exceptions such as taxes, easements, CC&R’s, etc., the Exceptions from Coverage in a Standard Coverage policy will also include the Western Regional Standard Coverage Exceptions listed below as numbers 1 through 7. The 2021 CLTA Standard Coverage Owner’s Policy will include the Western Regional Standard Coverage Exceptions listed below as numbers 1 through 7.

EXCEPTIONS FROM COVERAGE
Some historical land records contain Discriminatory Covenants that are illegal and unenforceable by law. This policy treats any Discriminatory Covenant in a document referenced in Schedule B as if each Discriminatory Covenant is redacted, repudiated, removed, and not republished or recirculated. Only the remaining provisions of the document are excepted from coverage.

This policy does not insure against loss or damage and the Company will not pay costs, attorneys’ fees, or expenses resulting from the terms and conditions of any lease or easement identified in Schedule A, and the following matters:

1. (a) Taxes or assessments that are not shown as existing liens by the records of any taxing authority that levies taxes or assessments on real property or by the Public Records; (b) proceedings by a public agency that may result in taxes or assessments, or notices of such proceedings, whether or not shown by the records of such agency or by the Public Records.

2. Any facts, rights, interests, or claims that are not shown by the Public Records but that could be ascertained by an inspection of the Land or that may be asserted by persons in possession of the Land.

3. Easements, liens or encumbrances, or claims thereof, not shown by the Public Records.

4. Any encroachment, encumbrance, violation, variation, or adverse circumstance affecting the Title that would be disclosed by an accurate and complete land survey of the Land and not shown by the Public Records.

5. (a) Unpatented mining claims; (b) reservations or exceptions in patents or in Acts authorizing the issuance thereof; (c) water rights, claims or title to water, whether or not the matters excepted under (a), (b), or (c) are shown by the Public Records.

6. Any lien or right to a lien for services, labor or material unless such lien is shown by the Public Records at Date of Policy.

7. Any claim to (a) ownership of or rights to minerals and similar substances, including but not limited to ores, metals, coal, lignite, oil, gas,

Order Number: RCO-7238657
Page Number: 13
First American Title

uranium, clay, rock, sand, and gravel located in, on, or under the Land or produced from the Land, whether such ownership or rights arise by lease, grant, exception, conveyance, reservation, or otherwise; and (b) any rights, privileges, immunities, rights of way, and easements associated therewith or appurtenant thereto, whether or not the interests or rights excepted in (a) or (b) appear in the Public Records or are shown in Schedule B.
2006 ALTA OWNER'S POLICY (06-17-06)

EXCLUSIONS FROM COVERAGE
The following matters are expressly excluded from the coverage of this policy, and the Company will not pay loss or damage, costs, attorneys' fees, or expenses that arise by reason of:

1. (a) Any law, ordinance, permit, or governmental regulation (including those relating to building and zoning) restricting, regulating, prohibiting, or relating to
(i) the occupancy, use, or enjoyment of the Land;
(ii) the character, dimensions, or location of any improvement erected on the Land; (iii) the subdivision of land; or
(iv) environmental protection;
or the effect of any violation of these laws, ordinances, or governmental regulations. This Exclusion 1(a) does not modify or limit the coverage provided under Covered Risk 5.
(b) Any governmental police power. This Exclusion 1(b) does not modify or limit the coverage provided under Covered Risk 6.

2. Rights of eminent domain. This Exclusion does not modify or limit the coverage provided under Covered Risk 7 or 8.

3. Defects, liens, encumbrances, adverse claims, or other matters (a) created, suffered, assumed, or agreed to by the Insured Claimant; (b) not Known to the Company, not recorded in the Public Records at Date of Policy, but Known to the Insured Claimant and not disclosed in writing to the Company by the Insured Claimant prior to the date the Insured Claimant became an Insured under this policy;
(c) resulting in no loss or damage to the Insured Claimant; (d) attaching or created subsequent to Date of Policy (however, this does not modify or limit the coverage provided under Covered Risk 9 and 10); or
(e) resulting in loss or damage that would not have been sustained if the Insured Claimant had paid value for the Title.

4. Any claim, by reason of the operation of federal bankruptcy, state insolvency, or similar creditors’ rights laws, that the transaction vesting the Title as shown in Schedule A, is
(a) a fraudulent conveyance or fraudulent transfer; or
(b) a preferential transfer for any reason not stated in Covered Risk 9 of this policy.

5. Any lien on the Title for real estate taxes or assessments imposed by governmental authority and created or attaching between Date of Policy and the date of recording of the deed or other instrument of transfer in the Public Records that vests Title as shown in Schedule A.

NOTE: The 2006 ALTA Owner’s Policy may be issued to afford either Standard Coverage or Extended Coverage. In addition to variable exceptions such as taxes, easements, CC&R’s, etc., the Exceptions from Coverage in a Standard Coverage policy will also include the Western Regional Standard Coverage Exceptions listed below as numbers 1 through 7.

EXCEPTIONS FROM COVERAGE
This policy does not insure against loss or damage, and the Company will not pay costs, attorneys’ fees or expenses, that arise by reason of:

The above policy form may be issued to afford either Standard Coverage or Extended Coverage. In addition to the above Exclusions from Coverage, the Exceptions from Coverage in a Standard Coverage policy will also include the following Exceptions from Coverage:

1. (a) Taxes or assessments that are not shown as existing liens by the records of any taxing authority that levies taxes or assessments on real property or by the Public Records; (b) proceedings by a public agency that may result in taxes or assessments, or notices of such proceedings, whether or not shown by the records of such agency or by the Public Records.

2. Any facts, rights, interests, or claims that are not shown by the Public Records at Date of Policy but that could be (a) ascertained by an inspection of the Land, or (b) asserted by persons or parties in possession of the Land.

3. Easements, liens or encumbrances, or claims thereof, not shown by the Public Records at Date of Policy.

4. Any encroachment, encumbrance, violation, variation, easement, or adverse circumstance affecting the Title that would be disclosed by an accurate and complete land survey of the Land and not shown by the Public Records at Date of Policy.

5. (a) Unpatented mining claims; (b) reservations or exceptions in patents or in Acts authorizing the issuance thereof; (c) water rights, claims or title to water, whether or not the matters excepted under (a), (b), or (c) are shown by the Public Records.

6. Any lien or right to a lien for services, labor, material or equipment unless such lien is shown by the Public Records at Date of Policy.

7. Any claim to (a) ownership of or rights to minerals and similar substances, including but not limited to ores, metals, coal, lignite, oil, gas, uranium, clay, rock, sand, and gravel located in, on, or under the Land or produced from the Land, whether such ownership or rights arise by lease, grant, exception, conveyance, reservation, or otherwise; and (b) any rights, privileges, immunities, rights of way, and easements associated therewith or appurtenant thereto, whether or not the interests or rights excepted in (a) or (b) appear in the Public Records or are shown in Schedule B.

APPENDIX D

ENVIRONMENTAL AGENCY DATABASE

SEARCH REPORT

FORM-LBC-SPM
®kcehCoeG htiw tropeR ™paM suidaR RDE ehT
6 Armstrong Road, 4th floor
Shelton, CT 06484
Toll Free: 800.352.0050
www.edrnet.com
7500 Hellman Avenue
7500 Hellman Avenue
Corona, CA 92880
Inquiry Number: 7961809.2s
April 17, 2025

TABLE OF CONTENTS

SECTION PAGE
Executive Summary ES1
Overview Map 2
Detail Map 3
Map Findings Summary 4
Map Findings 9
Orphan Summary 40
Government Records Searched/Data Currency Tracking GR-1

GEOCHECK ADDENDUM
Physical Setting Source Addendum A-1
Physical Setting Source Summary A-2
Physical Setting SSURGO Soil Map A-5
Physical Setting Source Map A-10
Physical Setting Source Map Findings A-12
Physical Setting Source Records Searched PSGR-1
Thank you for your business.

Please contact EDR at 1-800-352-0050
with any questions or comments.

Disclaimer - Copyright and Trademark Notice
This Report contains certain information obtained from a variety of public and other sources reasonably available to Environmental Data Resources, LLC. It cannot be concluded from this Report that coverage information for the target and surrounding properties does not exist from other sources. This Report is provided on an "AS IS", "AS AVAILABLE" basis. NO WARRANTY EXPRESS OR IMPLIED IS MADE WHATSOEVER IN CONNECTION WITH THIS REPORT. ENVIRONMENTAL DATA RESOURCES, LLC AND ITS SUBSIDIARIES,

AFFILIATES AND THIRD PARTY SUPPLIERS DISCLAIM ALL WARRANTIES, OF ANY KIND OR NATURE, EXPRESS OR IMPLIED,

ARISING OUT OF OR RELATED TO THIS REPORT OR ANY OF THE DATA AND INFORMATION PROVIDED IN THIS REPORT,

INCLUDING WITHOUT LIMITATION, ANY WARRANTIES REGARDING ACCURACY, QUALITY, CORRECTNESS, COMPLETENESS,

COMPREHENSIVENESS, SUITABILITY, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, NON-INFRINGEMENT, MISAPPROPRIATION, OR OTHERWISE. ALL RISK IS ASSUMED BY THE USER. IN NO EVENT SHALL ENVIRONMENTAL DATA

RESOURCES, LLC OR ITS SUBSIDIARIES, AFFILIATES OR THIRD PARTY SUPPLIERS BE LIABLE TO ANYONE FOR ANY DIRECT,

INCIDENTAL, INDIRECT, SPECIAL, CONSEQUENTIAL OR OTHER DAMAGES OF ANY TYPE OR KIND (INCLUDING BUT NOT LIMITED TO LOSS OF PROFITS, LOSS OF USE, OR LOSS OF DATA) INFORMATION PROVIDED IN THIS REPORT. Any analyses, estimates, ratings, environmental risk levels, or risk codes provided in this Report are provided for illustrative purposes only, and are not intended to provide, nor should they be interpreted as providing any facts regarding, or prediction or forecast of, any environmental risk for any property.

Only an assessment performed by a qualified environmental professional can provide findings, opinions or conclusions regarding the environmental risk or conditions in, on or at any property.

Copyright 2025 by Environmental Data Resources, LLC. All rights reserved. Reproduction in any media or format, in whole or in part, of any report or map of Environmental Data Resources, LLC, or its affiliates, is prohibited without prior written permission.

EDR and its logos (including Sanborn and Sanborn Map) are trademarks of Environmental Data Resources, LLC or its affiliates. All other trademarks used herein are the property of their respective owners.

TC7961809.2s Page 1

EXECUTIVE SUMMARY
TC7961809.2s EXECUTIVE SUMMARY 1
A search of available environmental records was conducted by Environmental Data Resources, Inc (EDR).

The report was designed to assist parties seeking to meet the search requirements of EPA’s Standards and Practices for All Appropriate Inquiries (40 CFR Part 312), the ASTM Standard Practice for Environmental Site Assessments (E1527 - 21), the ASTM Standard Practice for Environmental Site Assessments for Forestland or Rural Property (E2247 - 16), the ASTM Standard Practice for Limited Environmental Due Diligence: Transaction Screen Process (E1528 - 22) or custom requirements developed for the evaluation of environmental risk associated with a parcel of real estate.

TARGET PROPERTY INFORMATION

ADDRESS
7500 HELLMAN AVENUE
CORONA, CA 92880

COORDINATES
Latitude (North): 33.9530210 - 33˚ 57’ 10.87’’
Longitude (West): 117.6099400 - 117˚ 36’ 35.78’’
Universal Tranverse Mercator: Zone 11
UTM X (Meters): 443640.7
UTM Y (Meters): 3756920.2
Elevation: 576 ft. above sea level

USGS TOPOGRAPHIC MAP ASSOCIATED WITH TARGET PROPERTY
Target Property Map: 50005749 CORONA NORTH, CA
Version Date: 2022
West Map: 50006194 PRADO DAM, CA
Version Date: 2022

AERIAL PHOTOGRAPHY IN THIS REPORT
Portions of Photo from: 20200424, 20200423
Source: USDA

7961809.2s Page 2
11 RODRIGUEZ DAIRY 8340 AND 8342 CHINO ENVIROSTOR Lower 4428, 0.839, WSW 10 LEGEND DAIRY FARMS-S 14955 SCHLEISMAN ENVIROSTOR, VCP, WDS Higher 2655, 0.503, NNE 9 VANDER LAAN DAIRY 8755 CHINO CORONA RD UST FINDER RELEASE Lower 2509, 0.475, SSW C8 FLAMINGO DAIRY 14970 CHANDLER RD LUST, Cortese, EMI, HIST CORTESE, WDS, CERS Lower 2243, 0.425, South C7 FLAMINGO DAIRY 14970 CHANDLER RD UST FINDER RELEASE Lower 2243, 0.425, South B6 DUMP-HALL AVE 7675 HALL AVE SEMS-ARCHIVE Lower 1780, 0.337, SE B5 DUMP - HALL AVENUE 7675 HALL AVENUE ENVIROSTOR, HIST CORTESE Lower 1780, 0.337, SE A4 R.T. LEE CONSTRUCTIO 7200 HELLMAN AVE UST FINDER RELEASE Higher 1459, 0.276, North A3 R.T. LEE CONSTRUCTIO 7200 HELLMAN AVE LUST, Cortese, HIST CORTESE, CERS Higher 1459, 0.276, North 2 VANDER LAAN DAIRY 8755 CHINO CORONA RD LUST, Cortese, HIST CORTESE, HWTS, CERS Higher 1410, 0.267, WSW 1 RONDO ELEMENTARY SCH SOUTHEAST CORNER OF ENVIROSTOR, SCH Lower 226, 0.043, SW

MAPPED SITES SUMMARY
Target Property Address:
7500 HELLMAN AVENUE
CORONA, CA 92880
Click on Map ID to see full detail.

MAP RELATIVE DIST (ft. & mi.)

ID DATABASE ACRONYMS ELEVATION DIRECTION SITE NAME ADDRESS

EXECUTIVE SUMMARY
TC7961809.2s EXECUTIVE SUMMARY 3

TARGET PROPERTY SEARCH RESULTS
The target property was not listed in any of the databases searched by EDR.

DATABASES WITH NO MAPPED SITES
No mapped sites were found in EDR’s search of available ("reasonably ascertainable ") government records either on the target property or within the search radius around the target property for the following databases:

STANDARD ENVIRONMENTAL RECORDS
Lists of Federal NPL (Superfund) sites
NPL National Priority List
Proposed NPL Proposed National Priority List Sites
NPL LIENS Federal Superfund Liens
Lists of Federal Delisted NPL sites
Delisted NPL National Priority List Deletions
Lists of Federal sites subject to CERCLA removals and CERCLA orders FEDERAL FACILITY Federal Facility Site Information listing SEMS Superfund Enterprise Management System
Lists of Federal RCRA facilities undergoing Corrective Action CORRACTS Corrective Action Report
Lists of Federal RCRA TSD facilities
RCRA-TSDF RCRA - Treatment, Storage and Disposal
Lists of Federal RCRA generators
RCRA-LQG RCRA - Large Quantity Generators
RCRA-SQG RCRA - Small Quantity Generators
RCRA-VSQG RCRA - Very Small Quantity Generators (Formerly Conditionally Exempt Small Quantity Generators)
Federal institutional controls / engineering controls registries LUCIS Land Use Control Information System
US ENG CONTROLS Engineering Controls Sites List
US INST CONTROLS Institutional Controls Sites List
Federal ERNS list
ERNS Emergency Response Notification System

EXECUTIVE SUMMARY
TC7961809.2s EXECUTIVE SUMMARY 4
Lists of state- and tribal (Superfund) equivalent sites RESPONSE State Response Sites
Lists of state and tribal landfills and solid waste disposal facilities SWF/LF Solid Waste Information System
Lists of state and tribal leaking storage tanks
INDIAN LUST Leaking Underground Storage Tanks on Indian Land CPS-SLIC Statewide SLIC Cases
Lists of state and tribal registered storage tanks
FEMA UST Underground Storage Tank Listing
UST Active UST Facilities
AST Aboveground Petroleum Storage Tank Facilities
INDIAN UST Underground Storage Tanks on Indian Land
Lists of state and tribal voluntary cleanup sites
VCP Voluntary Cleanup Program Properties
INDIAN VCP Voluntary Cleanup Priority Listing
Lists of state and tribal brownfield sites
BROWNFIELDS Considered Brownfieds Sites Listing

ADDITIONAL ENVIRONMENTAL RECORDS
Local Brownfield lists
US BROWNFIELDS A Listing of Brownfields Sites
Local Lists of Landfill / Solid Waste Disposal Sites
WMUDS/SWAT Waste Management Unit Database
SWRCY Recycler Database
HAULERS Registered Waste Tire Haulers Listing
INDIAN ODI Report on the Status of Open Dumps on Indian Lands ODI Open Dump Inventory
DEBRIS REGION 9 Torres Martinez Reservation Illegal Dump Site Locations IHS OPEN DUMPS Open Dumps on Indian Land
Local Lists of Hazardous waste / Contaminated Sites
US HIST CDL Delisted National Clandestine Laboratory Register HIST Cal-Sites Historical Calsites Database
CDL Clandestine Drug Labs
Toxic Pits Toxic Pits Cleanup Act Sites
CERS HAZ WASTE California Environmental Reporting System Hazardous Waste US CDL National Clandestine Laboratory Register

EXECUTIVE SUMMARY
TC7961809.2s EXECUTIVE SUMMARY 5
Local Lists of Registered Storage Tanks
SWEEPS UST SWEEPS UST Listing
HIST UST Hazardous Substance Storage Container Database CERS TANKS California Environmental Reporting System (CERS) Tanks CA FID UST Facility Inventory Database
Local Land Records
LIENS Environmental Liens Listing
LIENS 2 CERCLA Lien Information
DEED Deed Restriction Listing
Records of Emergency Release Reports
HMIRS Hazardous Materials Information Reporting System
CHMIRS California Hazardous Material Incident Report System LDS Land Disposal Sites Listing
MCS Military Cleanup Sites Listing
SPILLS 90 SPILLS 90 data from FirstSearch
Other Ascertainable Records
RCRA NonGen / NLR RCRA - Non Generators / No Longer Regulated FUDS Formerly Used Defense Sites
DOD Department of Defense Sites
SCRD DRYCLEANERS State Coalition for Remediation of Drycleaners Listing US FIN ASSUR Financial Assurance Information

EPA WATCH LIST EPA WATCH LIST
2020 COR ACTION 2020 Corrective Action Program List
TSCA Toxic Substances Control Act
TRIS Toxic Chemical Release Inventory System
SSTS Section 7 Tracking Systems
ROD Records Of Decision
RMP Risk Management Plans
RAATS RCRA Administrative Action Tracking System
PRP Potentially Responsible Parties
PADS PCB Activity Database System
ICIS Integrated Compliance Information System
FTTS FIFRA/ TSCA Tracking System - FIFRA (Federal Insecticide, Fungicide, & Rodenticide Act)/TSCA (Toxic Substances Control Act)
MLTS Material Licensing Tracking System
COAL ASH DOE Steam-Electric Plant Operation Data
COAL ASH EPA Coal Combustion Residues Surface Impoundments List PCB TRANSFORMER PCB Transformer Registration Database
RADINFO Radiation Information Database
HIST FTTS FIFRA/TSCA Tracking System Administrative Case Listing DOT OPS Incident and Accident Data
CONSENT Superfund (CERCLA) Consent Decrees
INDIAN RESERV Indian Reservations
FUSRAP Formerly Utilized Sites Remedial Action Program
UMTRA Uranium Mill Tailings Sites
LEAD SMELTERS Lead Smelter Sites
US AIRS Aerometric Information Retrieval System Facility Subsystem

EXECUTIVE SUMMARY
TC7961809.2s EXECUTIVE SUMMARY 6
US MINES Mines Master Index File
ABANDONED MINES Abandoned Mines
MINES MRDS Mineral Resources Data System
FINDS Facility Index System/Facility Registry System
UXO Unexploded Ordnance Sites
DOCKET HWC Hazardous Waste Compliance Docket Listing
ECHO Enforcement & Compliance History Information
FUELS PROGRAM EPA Fuels Program Registered Listing
PFAS NPL Superfund Sites with PFAS Detections Information PFAS FEDERAL SITES Federal Sites PFAS Information
PFAS TRIS List of PFAS Added to the TRI
PFAS TSCA PFAS Manufacture and Imports Information
PFAS RCRA MANIFEST PFAS Transfers Identified In the RCRA Database Listing PFAS ATSDR PFAS Contamination Site Location Listing
PFAS WQP Ambient Environmental Sampling for PFAS

PFAS PROJECT NORTHEASTERN UNIVERSITY PFAS PROJECT
PFAS NPDES Clean Water Act Discharge Monitoring Information PFAS ECHO Facilities in Industries that May Be Handling PFAS Listing PFAS ECHO FIRE TRAIN Facilities in Industries that May Be Handling PFAS Listing PFAS PT 139 AIRPORT All Certified Part 139 Airports PFAS Information Listing AQUEOUS FOAM NRC Aqueous Foam Related Incidents Listing BIOSOLIDS ICIS-NPDES Biosolids Facility Data
UST FINDER UST Finder Database
E MANIFEST Hazardous Waste Electronic Manifest System
PFAS PFAS Investigation Site Location Listing
AQUEOUS FOAM Former Fire Training Facility Assessments Listing CA BOND EXP. PLAN Bond Expenditure Plan
CHROME PLATING Chrome Plating Facilities Listing
CUPA Listings CUPA Resources List
DRYCLEANERS Cleaner Facilities
EMI Emissions Inventory Data
ENF Enforcement Action Listing
Financial Assurance Financial Assurance Information Listing ICE Inspection, Compliance and Enforcement
HWP EnviroStor Permitted Facilities Listing
HWT Registered Hazardous Waste Transporter Database
HWTS Hazardous Waste Tracking System
HAZNET Facility and Manifest Data
MINES Mines Site Location Listing
MWMP Medical Waste Management Program Listing
NPDES NPDES Permits Listing
PEST LIC Pesticide Regulation Licenses Listing
PROC Certified Processors Database
Notify 65 Proposition 65 Records
HAZMAT Hazardous Material Facilities
UIC UIC Listing

UIC GEO UIC GEO (GEOTRACKER)
WASTEWATER PITS Oil Wastewater Pits Listing
WDS Waste Discharge System
WIP Well Investigation Program Case List

MILITARY PRIV SITES MILITARY PRIV SITES (GEOTRACKER)

PROJECT PROJECT (GEOTRACKER)
WDR Waste Discharge Requirements Listing
CIWQS California Integrated Water Quality System

CERS CERS

EXECUTIVE SUMMARY
TC7961809.2s EXECUTIVE SUMMARY 7

NON-CASE INFO NON-CASE INFO (GEOTRACKER)

OTHER OIL GAS OTHER OIL & GAS (GEOTRACKER)

PROD WATER PONDS PROD WATER PONDS (GEOTRACKER)

SAMPLING POINT SAMPLING POINT (GEOTRACKER)
WELL STIM PROJ Well Stimulation Project (GEOTRACKER)

EDR HIGH RISK HISTORICAL RECORDS
EDR Exclusive Records
EDR MGP EDR Proprietary Manufactured Gas Plants
EDR Hist Auto EDR Exclusive Historical Auto Stations
EDR Hist Cleaner EDR Exclusive Historical Cleaners

EDR RECOVERED GOVERNMENT ARCHIVES
Exclusive Recovered Govt. Archives
RGA LF Recovered Government Archive Solid Waste Facilities List RGA LUST Recovered Government Archive Leaking Underground Storage Tank SURROUNDING SITES: SEARCH RESULTS
Surrounding sites were identified in the following databases.

Elevations have been determined from the USGS Digital Elevation Model and should be evaluated on a relative (not an absolute) basis. Relative elevation information between sites of close proximity should be field verified. Sites with an elevation equal to or higher than the target property have been differentiated below from sites with an elevation lower than the target property.

Page numbers and map identification numbers refer to the EDR Radius Map report where detailed data on individual sites can be reviewed.

Sites listed in bold italics are in multiple databases.

Unmappable (orphan) sites are not considered in the foregoing analysis.

STANDARD ENVIRONMENTAL RECORDS
Lists of Federal CERCLA sites with NFRAP
SEMS-ARCHIVE: SEMS-ARCHIVE (Superfund Enterprise Management System Archive) tracks sites that have no further interest under the Federal Superfund Program based on available information. The list was formerly known as the CERCLIS-NFRAP, renamed to SEMS ARCHIVE by the EPA in 2015. EPA may perform a minimal level of assessment work at a site while it is archived if site conditions change and/or new information becomes available. Archived sites have been removed and archived from the inventory of SEMS sites. Archived status indicates that, to the best of EPA’s knowledge, assessment at a site has been completed and that EPA has determined no further steps will be taken to list the site on the National Priorities List (NPL), unless information indicates this decision was not appropriate or other considerations require a recommendation for listing at a later time. The decision does not necessarily mean that there is no hazard associated with a given site; it only means that. based upon available information, the location is not judged to be potential NPL site.

A review of the SEMS-ARCHIVE list, as provided by EDR, and dated 12/19/2024 has revealed that there

EXECUTIVE SUMMARY
TC7961809.2s EXECUTIVE SUMMARY 8
is 1 SEMS-ARCHIVE site within approximately 0.5 miles of the target property.

Lower Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ DUMP-HALL AVE 7675 HALL AVE SE 1/4 - 1/2 (0.337 mi.) B6 23 Site ID: 0902212
EPA Id: CAD980892426
Lists of state- and tribal hazardous waste facilities
ENVIROSTOR: The Department of Toxic Substances Control’s (DTSC’s) Site Mitigation and Brownfields Reuse Program’s (SMBRP’s) EnviroStor database identifes sites that have known contamination or sites for which there may be reasons to investigate further. The database includes the following site types: Federal Superfund sites (National Priorities List (NPL)); State Response, including Military Facilities and State Superfund; Voluntary Cleanup; and School sites. EnviroStor provides similar information to the information that was available in CalSites, and provides additional site information, including, but not limited to, identification of formerly-contaminated properties that have been released for reuse, properties where environmental deed restrictions have been recorded to prevent inappropriate land uses, and risk characterization information that is used to assess potential impacts to public health and the environment at contaminated sites.

A review of the ENVIROSTOR list, as provided by EDR, and dated 01/21/2025 has revealed that there are 4 ENVIROSTOR sites within approximately 1 mile of the target property.

Equal/Higher Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ LEGEND DAIRY FARMS-S 14955 SCHLEISMAN NNE 1/2 - 1 (0.503 mi.) 10 34 Facility Id: 60000781
Status: Certified
Lower Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ RONDO ELEMENTARY SCH SOUTHEAST CORNER OF SW 0 - 1/8 (0.043 mi.) 1 9 Facility Id: 60002406
Status: No Further Action
DUMP - HALL AVENUE 7675 HALL AVENUE SE 1/4 - 1/2 (0.337 mi.) B5 22 Facility Id: 33490050
Status: Refer: Other Agency
RODRIGUEZ DAIRY 8340 AND 8342 CHINO WSW 1/2 - 1 (0.839 mi.) 11 38 Facility Id: 36020004
Status: Refer: 1248 Local Agency
Lists of state and tribal leaking storage tanks
LUST: Leaking Underground Storage Tank (LUST) Sites included in GeoTracker. GeoTracker is the Water Boards data management system for sites that impact, or have the potential to impact, water quality in California, with emphasis on groundwater.

A review of the LUST list, as provided by EDR, has revealed that there are 3 LUST sites within approximately 0.5 miles of the target property.

EXECUTIVE SUMMARY
TC7961809.2s EXECUTIVE SUMMARY 9
Equal/Higher Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ VANDER LAAN DAIRY 8755 CHINO CORONA RD WSW 1/4 - 1/2 (0.267 mi.) 2 12 Database: LUST REG 8, Date of Government Version: 02/14/2005 Database: LUST, Date of Government Version: 02/24/2025
Status: Completed - Case Closed
Facility Status: Case Closed
Global Id: T0607100546
Global ID: T0607100546
R.T. LEE CONSTRUCTIO 7200 HELLMAN AVE N 1/4 - 1/2 (0.276 mi.) A3 17 Database: LUST REG 8, Date of Government Version: 02/14/2005 Database: LUST, Date of Government Version: 02/24/2025
Database: RIVERSIDE CO. LUST, Date of Government Version: 06/11/2024 Status: Completed - Case Closed
Facility Status: Case Closed
Facility Id: 91579
Global Id: T0606500240
Facility Status: 9
Global ID: T0606500240
Lower Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ FLAMINGO DAIRY 14970 CHANDLER RD S 1/4 - 1/2 (0.425 mi.) C8 26 Database: LUST REG 8, Date of Government Version: 02/14/2005 Database: LUST, Date of Government Version: 02/24/2025
Status: Completed - Case Closed
Facility Status: Case Closed
Global Id: T0606500481
Global ID: T0606500481

ADDITIONAL ENVIRONMENTAL RECORDS
Local Lists of Hazardous waste / Contaminated Sites
SCH: This category contains proposed and existing school sites that are being evaluated by DTSC for possible hazardous materials contamination. In some cases, these properties may be listed in the CalSites category. depending on the level of threat to public health and safety or the. environment they pose.

A review of the SCH list, as provided by EDR, and dated 01/21/2025 has revealed that there is 1 SCH site within approximately 0.25 miles of the target property.

Lower Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ RONDO ELEMENTARY SCH SOUTHEAST CORNER OF SW 0 - 1/8 (0.043 mi.) 1 9 Facility Id: 60002406
Status: No Further Action

EXECUTIVE SUMMARY
TC7961809.2s EXECUTIVE SUMMARY 10
Other Ascertainable Records
UST FINDER RELEASE: US EPA’s UST Finder data is a national composite of leaking underground storage tanks.

This data contains information about, and locations of, leaking underground storage tanks. Data was collected from state sources and standardized into a national profile by EPA’s Office of Underground Storage Tanks, Office of Research and Development, and the Association of State and Territorial Solid Waste Management Officials.

A review of the UST FINDER RELEASE list, as provided by EDR, and dated 06/08/2023 has revealed that there are 3 UST FINDER RELEASE sites within approximately 0.5 miles of the target property.

Equal/Higher Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ R.T. LEE CONSTRUCTIO 7200 HELLMAN AVE N 1/4 - 1/2 (0.276 mi.) A4 21 Lower Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ FLAMINGO DAIRY 14970 CHANDLER RD S 1/4 - 1/2 (0.425 mi.) C7 25 VANDER LAAN DAIRY 8755 CHINO CORONA RD SSW 1/4 - 1/2 (0.475 mi.) 9 33 Cortese: The sites for the list are designated by the State Water Resource Control Board (LUST), the Integrated Waste Board (SWF/LS), and the Department of Toxic Substances Control (Cal-Sites).

A review of the Cortese list, as provided by EDR, and dated 12/11/2024 has revealed that there are 3 Cortese sites within approximately 0.5 miles of the target property.

Equal/Higher Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ VANDER LAAN DAIRY 8755 CHINO CORONA RD WSW 1/4 - 1/2 (0.267 mi.) 2 12 Cleanup Status: COMPLETED - CASE CLOSED
R.T. LEE CONSTRUCTIO 7200 HELLMAN AVE N 1/4 - 1/2 (0.276 mi.) A3 17 Cleanup Status: COMPLETED - CASE CLOSED
Lower Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ FLAMINGO DAIRY 14970 CHANDLER RD S 1/4 - 1/2 (0.425 mi.) C8 26 Cleanup Status: COMPLETED - CASE CLOSED
HIST CORTESE: The sites for the list are designated by the State Water Resource Control Board [LUST], the Integrated Waste Board [SWF/LS], and the Department of Toxic Substances Control [CALSITES]. This listing is no longer updated by the state agency.

A review of the HIST CORTESE list, as provided by EDR, and dated 04/01/2001 has revealed that there are 4 HIST CORTESE sites within approximately 0.5 miles of the target property.

Equal/Higher Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ VANDER LAAN DAIRY 8755 CHINO CORONA RD WSW 1/4 - 1/2 (0.267 mi.) 2 12 Reg Id: 083603379T
R.T. LEE CONSTRUCTIO 7200 HELLMAN AVE N 1/4 - 1/2 (0.276 mi.) A3 17 Reg Id: 083301876T
Lower Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ DUMP - HALL AVENUE 7675 HALL AVENUE SE 1/4 - 1/2 (0.337 mi.) B5 22

EXECUTIVE SUMMARY
TC7961809.2s EXECUTIVE SUMMARY 11
Reg Id: 33490050
FLAMINGO DAIRY 14970 CHANDLER RD S 1/4 - 1/2 (0.425 mi.) C8 26 Reg Id: 083302926T

EXECUTIVE SUMMARY
TC7961809.2s EXECUTIVE SUMMARY 12
Due to poor or inadequate address information, the following sites were not mapped. Count: 4 records.

Site Name Database(s)
____________ ____________
7-ELEVEN INC. #41903 CERS HAZ WASTE, CERS TANKS, HWTS
CDL
CDL
CHINO VALLEY USD PRESERVE 2 SCHOOL ENVIROSTOR, SCH

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
Natural Gas
5 6 0
6 0 0
5 6 0
0 520
560
5 6 0 5 6 0
5 6 0
5 6 0
600
6 0 0 600
6 0 0

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. 560

MAP FINDINGS SUMMARY
Search
Distance Target Total
Database Property (Miles) < 1/8 1/8 - 1/4 1/4 - 1/2 1/2 - 1 > 1 Plotted

STANDARD ENVIRONMENTAL RECORDS
Lists of Federal NPL (Superfund) sites
NPL 1.000 0 0 0 0 NR 0
Proposed NPL 1.000 0 0 0 0 NR 0
NPL LIENS 1.000 0 0 0 0 NR 0
Lists of Federal Delisted NPL sites
Delisted NPL 1.000 0 0 0 0 NR 0
Lists of Federal sites subject to
CERCLA removals and CERCLA orders
FEDERAL FACILITY 0.500 0 0 0 NR NR 0
SEMS 0.500 0 0 0 NR NR 0
Lists of Federal CERCLA sites with NFRAP
SEMS-ARCHIVE 0.500 0 0 1 NR NR 1
Lists of Federal RCRA facilities
undergoing Corrective Action
CORRACTS 1.000 0 0 0 0 NR 0
Lists of Federal RCRA TSD facilities
RCRA-TSDF 0.500 0 0 0 NR NR 0
Lists of Federal RCRA generators
RCRA-LQG 0.250 0 0 NR NR NR 0
RCRA-SQG 0.250 0 0 NR NR NR 0
RCRA-VSQG 0.250 0 0 NR NR NR 0
Federal institutional controls /
engineering controls registries
LUCIS 0.500 0 0 0 NR NR 0
US ENG CONTROLS 0.500 0 0 0 NR NR 0
US INST CONTROLS 0.500 0 0 0 NR NR 0
Federal ERNS list
ERNS TP NR NR NR NR NR 0
Lists of state- and tribal
(Superfund) equivalent sites
RESPONSE 1.000 0 0 0 0 NR 0
Lists of state- and tribal
hazardous waste facilities
ENVIROSTOR 1.000 1 0 1 2 NR 4
Lists of state and tribal landfills
and solid waste disposal facilities
SWF/LF 0.500 0 0 0 NR NR 0
TC7961809.2s Page 4

MAP FINDINGS SUMMARY
Search
Distance Target Total
Database Property (Miles) < 1/8 1/8 - 1/4 1/4 - 1/2 1/2 - 1 > 1 Plotted Lists of state and tribal leaking storage tanks
LUST 0.500 0 0 3 NR NR 3
INDIAN LUST 0.500 0 0 0 NR NR 0
CPS-SLIC 0.500 0 0 0 NR NR 0
Lists of state and tribal registered storage tanks
FEMA UST 0.250 0 0 NR NR NR 0
UST 0.250 0 0 NR NR NR 0
AST 0.250 0 0 NR NR NR 0
INDIAN UST 0.250 0 0 NR NR NR 0
Lists of state and tribal voluntary cleanup sites
VCP 0.500 0 0 0 NR NR 0
INDIAN VCP 0.500 0 0 0 NR NR 0
Lists of state and tribal brownfield sites
BROWNFIELDS 0.500 0 0 0 NR NR 0

ADDITIONAL ENVIRONMENTAL RECORDS
Local Brownfield lists
US BROWNFIELDS 0.500 0 0 0 NR NR 0
Local Lists of Landfill / Solid
Waste Disposal Sites
WMUDS/SWAT 0.500 0 0 0 NR NR 0
SWRCY 0.500 0 0 0 NR NR 0
HAULERS TP NR NR NR NR NR 0
INDIAN ODI 0.500 0 0 0 NR NR 0
ODI 0.500 0 0 0 NR NR 0
DEBRIS REGION 9 0.500 0 0 0 NR NR 0
IHS OPEN DUMPS 0.500 0 0 0 NR NR 0
Local Lists of Hazardous waste /
Contaminated Sites
US HIST CDL TP NR NR NR NR NR 0
HIST Cal-Sites 1.000 0 0 0 0 NR 0
SCH 0.250 1 0 NR NR NR 1
CDL TP NR NR NR NR NR 0
Toxic Pits 1.000 0 0 0 0 NR 0
CERS HAZ WASTE 0.250 0 0 NR NR NR 0
US CDL TP NR NR NR NR NR 0
Local Lists of Registered Storage Tanks
SWEEPS UST 0.250 0 0 NR NR NR 0
HIST UST 0.250 0 0 NR NR NR 0
CERS TANKS 0.250 0 0 NR NR NR 0
CA FID UST 0.250 0 0 NR NR NR 0
Local Land Records
LIENS TP NR NR NR NR NR 0
TC7961809.2s Page 5

MAP FINDINGS SUMMARY
Search
Distance Target Total
Database Property (Miles) < 1/8 1/8 - 1/4 1/4 - 1/2 1/2 - 1 > 1 Plotted LIENS 2 TP NR NR NR NR NR 0
DEED 0.500 0 0 0 NR NR 0
Records of Emergency Release Reports
HMIRS TP NR NR NR NR NR 0
CHMIRS TP NR NR NR NR NR 0
LDS TP NR NR NR NR NR 0
MCS TP NR NR NR NR NR 0
SPILLS 90 TP NR NR NR NR NR 0
Other Ascertainable Records
RCRA NonGen / NLR 0.250 0 0 NR NR NR 0
FUDS 1.000 0 0 0 0 NR 0
DOD 1.000 0 0 0 0 NR 0
SCRD DRYCLEANERS 0.500 0 0 0 NR NR 0
US FIN ASSUR TP NR NR NR NR NR 0
EPA WATCH LIST TP NR NR NR NR NR 0
2020 COR ACTION 0.250 0 0 NR NR NR 0
TSCA TP NR NR NR NR NR 0
TRIS TP NR NR NR NR NR 0
SSTS TP NR NR NR NR NR 0
ROD 1.000 0 0 0 0 NR 0
RMP TP NR NR NR NR NR 0
RAATS TP NR NR NR NR NR 0
PRP TP NR NR NR NR NR 0
PADS TP NR NR NR NR NR 0
ICIS TP NR NR NR NR NR 0
FTTS TP NR NR NR NR NR 0
MLTS TP NR NR NR NR NR 0
COAL ASH DOE TP NR NR NR NR NR 0
COAL ASH EPA 0.500 0 0 0 NR NR 0
PCB TRANSFORMER TP NR NR NR NR NR 0
RADINFO TP NR NR NR NR NR 0
HIST FTTS TP NR NR NR NR NR 0
DOT OPS TP NR NR NR NR NR 0
CONSENT 1.000 0 0 0 0 NR 0
INDIAN RESERV 1.000 0 0 0 0 NR 0
FUSRAP 1.000 0 0 0 0 NR 0
UMTRA 0.500 0 0 0 NR NR 0
LEAD SMELTERS TP NR NR NR NR NR 0
US AIRS TP NR NR NR NR NR 0
US MINES 0.250 0 0 NR NR NR 0
ABANDONED MINES 0.250 0 0 NR NR NR 0
MINES MRDS 0.250 0 0 NR NR NR 0
FINDS TP NR NR NR NR NR 0
UXO 1.000 0 0 0 0 NR 0
DOCKET HWC TP NR NR NR NR NR 0
ECHO TP NR NR NR NR NR 0
FUELS PROGRAM 0.250 0 0 NR NR NR 0
PFAS NPL 0.250 0 0 NR NR NR 0
PFAS FEDERAL SITES 0.250 0 0 NR NR NR 0
TC7961809.2s Page 6

MAP FINDINGS SUMMARY
Search
Distance Target Total
Database Property (Miles) < 1/8 1/8 - 1/4 1/4 - 1/2 1/2 - 1 > 1 Plotted PFAS TRIS 0.250 0 0 NR NR NR 0
PFAS TSCA 0.250 0 0 NR NR NR 0
PFAS RCRA MANIFEST 0.250 0 0 NR NR NR 0
PFAS ATSDR 0.250 0 0 NR NR NR 0
PFAS WQP 0.250 0 0 NR NR NR 0
PFAS PROJECT 0.250 0 0 NR NR NR 0
PFAS NPDES 0.250 0 0 NR NR NR 0
PFAS ECHO 0.250 0 0 NR NR NR 0
PFAS ECHO FIRE TRAIN 0.250 0 0 NR NR NR 0
PFAS PT 139 AIRPORT 0.250 0 0 NR NR NR 0
AQUEOUS FOAM NRC 0.250 0 0 NR NR NR 0
BIOSOLIDS TP NR NR NR NR NR 0
UST FINDER 0.250 0 0 NR NR NR 0
UST FINDER RELEASE 0.500 0 0 3 NR NR 3
E MANIFEST 0.250 0 0 NR NR NR 0
PFAS 0.250 0 0 NR NR NR 0
AQUEOUS FOAM 0.250 0 0 NR NR NR 0
CA BOND EXP. PLAN 1.000 0 0 0 0 NR 0
CHROME PLATING 0.500 0 0 0 NR NR 0
Cortese 0.500 0 0 3 NR NR 3
CUPA Listings 0.250 0 0 NR NR NR 0
DRYCLEANERS 0.250 0 0 NR NR NR 0
EMI TP NR NR NR NR NR 0
ENF TP NR NR NR NR NR 0
Financial Assurance TP NR NR NR NR NR 0
ICE TP NR NR NR NR NR 0
HIST CORTESE 0.500 0 0 4 NR NR 4
HWP 1.000 0 0 0 0 NR 0
HWT 0.250 0 0 NR NR NR 0
HWTS TP NR NR NR NR NR 0
HAZNET TP NR NR NR NR NR 0
MINES 0.250 0 0 NR NR NR 0
MWMP 0.250 0 0 NR NR NR 0
NPDES TP NR NR NR NR NR 0
PEST LIC TP NR NR NR NR NR 0
PROC 0.500 0 0 0 NR NR 0
Notify 65 1.000 0 0 0 0 NR 0
HAZMAT 0.250 0 0 NR NR NR 0
UIC TP NR NR NR NR NR 0
UIC GEO TP NR NR NR NR NR 0
WASTEWATER PITS 0.500 0 0 0 NR NR 0
WDS TP NR NR NR NR NR 0
WIP 0.250 0 0 NR NR NR 0
MILITARY PRIV SITES TP NR NR NR NR NR 0
PROJECT TP NR NR NR NR NR 0
WDR TP NR NR NR NR NR 0
CIWQS TP NR NR NR NR NR 0
CERS TP NR NR NR NR NR 0
NON-CASE INFO TP NR NR NR NR NR 0
OTHER OIL GAS TP NR NR NR NR NR 0
PROD WATER PONDS TP NR NR NR NR NR 0
TC7961809.2s Page 7

MAP FINDINGS SUMMARY
Search
Distance Target Total
Database Property (Miles) < 1/8 1/8 - 1/4 1/4 - 1/2 1/2 - 1 > 1 Plotted SAMPLING POINT TP NR NR NR NR NR 0
WELL STIM PROJ TP NR NR NR NR NR 0

EDR HIGH RISK HISTORICAL RECORDS
EDR Exclusive Records
EDR MGP 1.000 0 0 0 0 NR 0
EDR Hist Auto 0.125 0 NR NR NR NR 0
EDR Hist Cleaner 0.125 0 NR NR NR NR 0

EDR RECOVERED GOVERNMENT ARCHIVES
Exclusive Recovered Govt. Archives
RGA LF TP NR NR NR NR NR 0
RGA LUST TP NR NR NR NR NR 0
- Totals -- 0 2 0 15 2 0 19
NOTES:

TP = Target Property
NR = Not Requested at this Search Distance
Sites may be listed in more than one database
TC7961809.2s Page 8

Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Completed Date: 11/29/2016
Completed Document Type: Preliminary Endangerment Assessment Tech Memo Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Application for background purposes.

Comments: District submitted e-copy of Phase I ESA, dated 06/30/16, w/ EOP Completed Date: 08/22/2016
Completed Document Type: Other Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: CRBU processed Form 1554; closeout complete.

Completed Date: 03/12/2018
Completed Document Type: Cost Recovery Closeout Memo
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Completed Info:

Alias Type: Envirostor ID Number
Alias Name: 60002406
Alias Type: Project Code (Site Code)
Alias Name: 404934
Potential Description: SOIL
Confirmed COC: 30006-NO 30007-NO 30008-NO 30009-NO 30343-NO 31001-NO Organic (tetraethyl lead
Potential COC: Under Investigation DDD DDE DDT Dioxin (as 2,3,7,8-TCDD TEQ Lead, Past Use: AGRICULTURAL - LIVESTOCK, RESIDENTIAL AREA, VEHICLE MAINTENANCE APN: NONE SPECIFIED
Longitude: -117.6092
Latitude: 33.95121
Funding: School District
Site Mgmt Req: NONE SPECIFIED
Restricted Use: NO
Special Program: Not reported
Senate: 31
Assembly: 63
Division Branch: Southern California Schools & Brownfields Outreach Supervisor: Shahir Haddad
Program Manager: Johnson Abraham
Lead Agency: SMBRP
Regulatory Agencies: SMBRP
NPL: NO
Acres: 10
Site Type Detailed: School
Site Type: School Investigation
Site Code: 404934
Status Date: 04/14/2017
Status: No Further Action
Facility ID: 60002406
City,State,Zip: EASTVALE, CA 92880
Address: SOUTHEAST CORNER OF HELLMAN AVENUE & WALTERS STREET Name: RONDO ELEMENTARY SCHOOL
ENVIROSTOR:
226 ft.

0.043 mi.

Relative:

Lower
Actual:
575 ft.
< 1/8 EASTVALE, CA 92880

SW SOUTHEAST CORNER OF HELLMAN AVENUE & WALTERS STREET SCH N/A 1 RONDO ELEMENTARY SCHOOL ENVIROSTOR S119002121
TC7961809.2s Page 9

Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Latitude: 33.95121
Funding: School District
Restricted Use: NO
Status Date: 04/14/2017
Status: No Further Action
Special Program Status: Not reported
Senate: 31
Assembly: 63
Site Code: 404934
Division Branch: Southern California Schools & Brownfields Outreach Supervisor: Shahir Haddad
Project Manager: Johnson Abraham
Lead Agency Description: DTSC - Site Cleanup Program
Lead Agency: SMBRP
Cleanup Oversight Agencies: SMBRP
National Priorities List: NO
Acres: 10
Site Mgmt. Req.: NONE SPECIFIED
Site Type Detail: School
Site Type: School Investigation
Facility ID: 60002406
City,State,Zip: EASTVALE, CA 92880
Address: SOUTHEAST CORNER OF HELLMAN AVENUE & WALTERS STREET Name: RONDO ELEMENTARY SCHOOL
SCH:

Schedule Revised Date: Not reported
Schedule Due Date: Not reported
Schedule Document Type: Not reported
Schedule Sub Area Name: Not reported
Schedule Area Name: Not reported
Future Due Date: Not reported
Future Document Type: Not reported
Future Sub Area Name: Not reported
Future Area Name: Not reported
mail on 09/14/16.

Comments: Fully executed EOA sent to District via email on 09/13/16 and regular Completed Date: 09/13/2016
Completed Document Type: Environmental Oversight Agreement Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 04/14/2017
Completed Document Type: Preliminary Endangerment Assessment Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/22/2016
Completed Document Type: Environmental Oversight Agreement Application Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
RONDO ELEMENTARY SCHOOL (Continued) S119002121
TC7961809.2s Page 10

Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Schedule Document Type: Not reported
Schedule Sub Area Name: Not reported
Schedule Area Name: Not reported
Future Due Date: Not reported
Future Document Type: Not reported
Future Sub Area Name: Not reported
Future Area Name: Not reported
mail on 09/14/16.

Comments: Fully executed EOA sent to District via email on 09/13/16 and regular Completed Date: 09/13/2016
Completed Document Type: Environmental Oversight Agreement Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 04/14/2017
Completed Document Type: Preliminary Endangerment Assessment Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/22/2016
Completed Document Type: Environmental Oversight Agreement Application Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 11/29/2016
Completed Document Type: Preliminary Endangerment Assessment Tech Memo Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Application for background purposes.

Comments: District submitted e-copy of Phase I ESA, dated 06/30/16, w/ EOP Completed Date: 08/22/2016
Completed Document Type: Other Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: CRBU processed Form 1554; closeout complete.

Completed Date: 03/12/2018
Completed Document Type: Cost Recovery Closeout Memo
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Completed Info:

Alias Type: Envirostor ID Number
Alias Name: 60002406
Alias Type: Project Code (Site Code)
Alias Name: 404934
Potential Description: SOIL
Confirmed COC: 30006-NO, 30007-NO, 30008-NO, 30009-NO, 30343-NO, 31001-NO Lead, Organic (tetraethyl lead
Potential COC: Under Investigation, DDD, DDE, DDT, Dioxin (as 2,3,7,8-TCDD TEQ, Past Use: AGRICULTURAL - LIVESTOCK, RESIDENTIAL AREA, VEHICLE MAINTENANCE APN: NONE SPECIFIED
Longitude: -117.6092
RONDO ELEMENTARY SCHOOL (Continued) S119002121
TC7961809.2s Page 11

Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Schedule Revised Date: Not reported
Schedule Due Date: Not reported
RONDO ELEMENTARY SCHOOL (Continued) S119002121
Organization Name: SAN BERNARDINO COUNTY
Contact Name: JACKSON CRUTSINGER
Contact Type: Local Agency Caseworker - Primary Caseworker Global Id: T0607100546
LUST:

Site History: Not reported
Claim Status: Not reported
Claim Number: Not reported
RWQCB Region: SANTA ANA RWQCB (REGION 8)
Facility Project Subtype: Not reported
Military DOD Site: No
CA Enviroscreen 4 Score: 70-75%
CA Enviroscreen 3 Score: 76-80%
Disadvantaged Community: Not reported
Dwr Groundwater Subbasin Name: Upper Santa Ana Valley - Chino (8-002.01) CA Water Watershed Name: Santa Ana River - Middle Santa Ana River - Chino (Split) (801.21) No Further Action Date: 09/01/1999
Stop Description: Not reported
Stop Method: Not reported
Discharge Cause: Unknown
Discharge Source: Other
How Discovered Description: Not reported
How Discovered: Tank Closure
Leak Reported Date: 01/15/1999
Begin Date: 10/28/1998
Quantity Released Gallons: Not reported
Coordinate Source: Google Geocode
EPA Region: 9
Potential Contaminants of Concern: Diesel
Potential Media Affect: Soil
Local Case Number: 98101
File Location: Local Agency
Local Agency: SAN BERNARDINO COUNTY
RB Case Number: 083603379T
Case Worker: JC
Status Date: 09/01/1999
Status: Completed - Case Closed
Longitude: -117.613702
Latitude: 33.944116
Global Id: T0607100546
Geo Track:

Case Type: LUST Cleanup Site
Lead Agency: SAN BERNARDINO COUNTY
City,State,Zip: CHINO, CA 91710
Address: 8755 CHINO CORONA RD
Name: VANDER LAAN DAIRY
LUST:
1410 ft. CERS

0.267 mi. HWTS
Relative:

Higher
Actual:
577 ft.
1/4-1/2 CHINO, CA 91710 HIST CORTESE
WSW 8755 CHINO CORONA RD Cortese N/A
2 VANDER LAAN DAIRY LUST S103952284
TC7961809.2s Page 12

Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Status: Open - Remediation
Global Id: T0607100546
Status Date: 10/28/1998
Status: Open - Site Assessment
Global Id: T0607100546
Status Date: 10/28/1998
Status: Open - Case Begin Date
Global Id: T0607100546
LUST:

Action: Leak Stopped
Date: 10/28/1998
Action Type: Other
Global Id: T0607100546
Action: Closure/No Further Action Letter
Date: 08/25/1999
Action Type: ENFORCEMENT
Global Id: T0607100546
Action: Leak Reported
Date: 01/15/1999
Action Type: Other
Global Id: T0607100546
Action: Closure/No Further Action Letter
Date: 09/01/1999
Action Type: ENFORCEMENT
Global Id: T0607100546
Action: Excavation
Date: 07/20/1999
Action Type: REMEDIATION
Global Id: T0607100546
Action: Leak Discovery
Date: 10/28/1998
Action Type: Other
Global Id: T0607100546
LUST:

Phone Number: 9517823238
Email: [email protected]
City: RIVERSIDE
Address: 3737 Main Street, Suite 500
Organization Name: SANTA ANA RWQCB (REGION 8)
Contact Name: MIGUEL OVIEDO
Contact Type: Regional Board Caseworker
Global Id: T0607100546
Phone Number: Not reported
Email: [email protected]
City: SAN BERNARDINO
Address: 620 SOUTH E STREET
VANDER LAAN DAIRY (Continued) S103952284
TC7961809.2s Page 13

Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
MTBE Class: *
MTBE Tested: Not Required to be Tested.

MTBE Fuel: 0
Max MTBE Soil: Not reported
MTBE Concentration: 0
Max MTBE GW: Not reported
MTBE Date: Not reported
Longitude: -117.6144623
Latitude: 33.9458152
Oversite Program: LUST
Interim: Not reported
Facility Contact: Not reported
Operator: Not reported
Soil Qualifies: Not reported
GW Qualifies: Not reported
Enter Date: 3/22/1999
Date Post Remedial Action Monitoring: Not reported
Date Remedial Action Underway: 7/20/1999
Date Remediation Plan Submitted: Not reported
Date Pollution Characterization Began: Not reported
Date Prelim Assessment Workplan Submitted: Not reported Close Date: 9/1/1999
Enforcement Date: Not reported
Discover Date: 10/28/1998
Date Preliminary Assessment Began: Not reported
Date Confirmation of Leak Began: 10/28/1998
Enter Date: 3/22/1999
How Stopped Date: 10/28/1998
Global ID: T0607100546
Leak Source: UNK
Leak Cause: UNK
How Stopped: Not reported
How Discovered: Tank Closure
Funding: Not reported
Enf Type: CLOS
Cross Street: HELLMAN
Abate Method: Not reported
Qty Leaked: Not reported
Substance: Diesel
Case Type: Soil only
Local Case Num: 98101
Case Number: 083603379T
Facility Status: Case Closed
Regional Board: Santa Ana Region
County: San Bernardino
Region: 8
City: CHINO
Address: 8755 CHINO CORONA RD
Name: VANDER LAAN DAIRY
LUST REG 8:

Status Date: 09/01/1999
Status: Completed - Case Closed
Global Id: T0607100546
Status Date: 07/20/1999
VANDER LAAN DAIRY (Continued) S103952284
TC7961809.2s Page 14

Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Mailing Name: Not reported
Last Act Date: Not reported
Create Date: 09/20/2022
Inactive Date: 12/20/2022
EPA ID: CAC003195739
City,State,Zip: CHINO, CA 92880
Address 2: Not reported
Address: 8755 CHINO CORONA RD.

Name: ORANGE COUNTY PUBLIC WORKS
HWTS:

Reg Id: 083603379T
Reg By: LTNKA
Facility County Code: 36
Region: CORTESE
City,State,Zip: CHINO, CA 91710
edr_fadd1: 8755
edr_fname: VANDER LAAN DAIRY
HIST CORTESE:

File Name: Active Open
Waste Management Uit Name: Not reported
Solid Waste Id No: Not reported
WID Id: Not reported
Region 2: Not reported
Effective Date: Not reported
Waste Discharge System No: Not reported
Order No: Not reported
Flag: active
Swat R: Not reported
Enf Type: Not reported
Owner: Not reported
Longitude: Not reported
Latitude: Not reported
Site Code: Not reported
Status Date: Not reported
Cleanup Status: COMPLETED - CASE CLOSED
Site/Facility Type: LUST CLEANUP SITE
Global ID: T0607100546
Envirostor Id: Not reported
Region: CORTESE
City,State,Zip: CHINO, CA 91710
Address: 8755 CHINO CORONA RD
Name: VANDER LAAN DAIRY
CORTESE:

Summary: Not reported
Work Suspended: Not reported
Cleanup Fund Id: Not reported
Priority: Not reported
Beneficial: Not reported
Hydr Basin #: UPPER SANTA ANA VALL
Local Agency: 36000L
Lead Agency: Local Agency
Staff Initials: JC3
Staff: TME
VANDER LAAN DAIRY (Continued) S103952284
TC7961809.2s Page 15

Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Affiliation Phone: 9517823238,
Affiliation Zip: Not reported
Affiliation Country: Not reported
Affiliation State: CA
Affiliation City: RIVERSIDE
Affiliation Address: 3737 Main Street, Suite 500
Entity Title: Not reported
Entity Name: MIGUEL OVIEDO - SANTA ANA RWQCB (REGION 8) Affiliation Type Desc: Regional Board Caseworker
Affiliation Phone: ,
Affiliation Zip: Not reported
Affiliation Country: Not reported
Affiliation State: CA
Affiliation City: SAN BERNARDINO
Affiliation Address: 620 SOUTH E STREET
Entity Title: Not reported
Entity Name: JACKSON CRUTSINGER - SAN BERNARDINO COUNTY Affiliation Type Desc: Local Agency Caseworker
Affiliation:

CERS Description: Leaking Underground Storage Tank Cleanup Site CERS ID: T0607100546
Site ID: 862655
City,State,Zip: CHINO, CA 91710
Address: 8755 CHINO CORONA RD
Name: VANDER LAAN DAIRY
CERS:

Longitude: -117.61373699000001
Latitude: 33.942906999999998
Category: State
Facility Type: Temporary
Facility Status: Inactive
Contact Fax: Not reported
Contact Phone: Not reported
City,State,Zip: SANTA ANA, CA 92701
Contact Address 2: Not reported
Contact Address: 601 N. ROSS ST.

Contact Name: ORANGE COUNTY PUBLIC WORKS
Owner Fax: Not reported
Owner Phone: Not reported
Owner City,State,Zip: SANTA ANA, CA 92701
Owner Address 2: Not reported
Owner Address: 601 N. ROSS ST.

Owner Name: ORANGE COUNTY PUBLIC WORKS
Mailing City,State,Zip: SANTA ANA, CA 92701
Mailing Address 2: Not reported
Mailing Address: 601 N. ROSS ST.

VANDER LAAN DAIRY (Continued) S103952284
TC7961809.2s Page 16

Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Phone Number: 9517824381
Email: [email protected]
City: RIVERSIDE
Address: 3737 Main Street, Suite 500
Organization Name: SANTA ANA RWQCB (REGION 8)
Contact Name: JESSICA LAW
Contact Type: Regional Board Caseworker
Global Id: T0606500240
LUST:

Site History: Not reported
Claim Status: Not reported
Claim Number: Not reported
RWQCB Region: SANTA ANA RWQCB (REGION 8)
Facility Project Subtype: Not reported
Military DOD Site: No
CA Enviroscreen 4 Score: 60-65%
CA Enviroscreen 3 Score: 61-65%
Disadvantaged Community: Not reported
Dwr Groundwater Subbasin Name: Upper Santa Ana Valley - Chino (8-002.01) CA Water Watershed Name: Santa Ana River - Middle Santa Ana River - Chino (Split) (801.21) No Further Action Date: 08/26/1992
Stop Description: Not reported
Stop Method: Close and Remove Tank
Discharge Cause: Unknown
Discharge Source: Other
How Discovered Description: Not reported
How Discovered: Tank Closure
Leak Reported Date: 07/01/1991
Begin Date: 05/30/1991
Quantity Released Gallons: Not reported
Coordinate Source: Google Map Move
EPA Region: 9
Potential Contaminants of Concern: Gasoline
Potential Media Affect: Soil
Local Case Number: 91579
File Location: Local Agency Warehouse
Local Agency: RIVERSIDE COUNTY
RB Case Number: 083301876T
Case Worker: RIV
Status Date: 08/26/1992
Status: Completed - Case Closed
Longitude: -117.6104513
Latitude: 33.953497
Global Id: T0606500240
Geo Track:

Case Type: LUST Cleanup Site
Lead Agency: RIVERSIDE COUNTY
City,State,Zip: CORONA, CA 91720
Address: 7200 HELLMAN AVE
Name: R.T. LEE CONSTRUCTION
LUST:
1459 ft. Site 1 of 2 in cluster A

0.276 mi. CERS
Relative:

Higher
Actual:
595 ft.
1/4-1/2 CORONA, CA 91720 HIST CORTESE
North 7200 HELLMAN AVE Cortese N/A
A3 R.T. LEE CONSTRUCTION LUST S104160153
TC7961809.2s Page 17

Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Status Date: 08/26/1992
Status: Completed - Case Closed
Global Id: T0606500240
Status Date: 01/22/1992
Status: Open - Remediation
Global Id: T0606500240
Status Date: 07/08/1991
Status: Open - Site Assessment
Global Id: T0606500240
Status Date: 05/30/1991
Status: Open - Case Begin Date
Global Id: T0606500240
LUST:

Action: Leak Stopped
Date: 05/30/1991
Action Type: Other
Global Id: T0606500240
Action: Closure/No Further Action Letter - #RivCo Closure Date: 08/26/1992
Action Type: ENFORCEMENT
Global Id: T0606500240
Action: Leak Reported
Date: 07/01/1991
Action Type: Other
Global Id: T0606500240
Action: Closure/No Further Action Letter
Date: 08/26/1992
Action Type: ENFORCEMENT
Global Id: T0606500240
Action: File review - #RCDEH Upload Site File 10/21/2015 Date: 08/25/1992
Action Type: ENFORCEMENT
Global Id: T0606500240
Action: Leak Discovery
Date: 05/30/1991
Action Type: Other
Global Id: T0606500240
LUST:

Phone Number: 9519558980
Email: Not reported
City: RIVERSIDE
Address: 3880 LEMON ST SUITE 200
Organization Name: RIVERSIDE COUNTY
Contact Name: Riverside County LOP
Contact Type: Local Agency Caseworker - Primary Caseworker Global Id: T0606500240
R.T. LEE CONSTRUCTION (Continued) S104160153
TC7961809.2s Page 18

Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Beneficial: Not reported
Hydr Basin #: UPPER SANTA ANA VALL
Local Agency: 33000L
Lead Agency: Local Agency
Staff Initials: UNK
Staff: CAB
MTBE Class: *
MTBE Tested: Not Required to be Tested.

MTBE Fuel: 0
Max MTBE Soil: Not reported
MTBE Concentration: 0
Max MTBE GW: Not reported
MTBE Date: Not reported
Longitude: -117.6104513
Latitude: 33.953497
Oversite Program: LUST
Interim: Not reported
Facility Contact: Not reported
Operator: Not reported
Soil Qualifies: Not reported
GW Qualifies: Not reported
Enter Date: 7/20/1991
Date Post Remedial Action Monitoring: Not reported
Date Remedial Action Underway: 1/22/1992
Date Remediation Plan Submitted: Not reported
Date Pollution Characterization Began: Not reported
Date Prelim Assessment Workplan Submitted: 7/8/1991
Close Date: 8/26/1992
Enforcement Date: Not reported
Discover Date: Not reported
Date Preliminary Assessment Began: Not reported
Date Confirmation of Leak Began: Not reported
Enter Date: 7/20/1991
How Stopped Date: Not reported
Global ID: T0606500240
Leak Source: UNK
Leak Cause: UNK
How Stopped: Not reported
How Discovered: Not reported
Funding: Not reported
Enf Type: CLOS
Cross Street: Not reported
spreading or land farming)
Abate Method: Excavate and Treat - remove contaminated soil and treat (includes Qty Leaked: Not reported
Substance: Misc. Motor Vehicle Fuels
Case Type: Soil only
Local Case Num: 91579
Case Number: 083301876T
Facility Status: Case Closed
Regional Board: Santa Ana Region
County: Riverside
Region: 8
City: CORONA
Address: 7200 HELLMAN AVE
Name: R.T. LEE CONSTRUCTION
LUST REG 8:

R.T. LEE CONSTRUCTION (Continued) S104160153
TC7961809.2s Page 19