Item E-17 Agenda Report — Beverly Hills City Council, May 21, 2024 (part 2 of 2)

Photograph taken December 15, 2022 showing the concrete walls and debris encountered in the test pit. Water can also be seen at the deepest part of the excavation.

CONCLUSIONS
Buried concrete walls exist below grade in the parking lot in the area which exhibited distress. A structure is thought to have existing on this site in the 1920's. A plan provided by the City shows the structure. That plan is included in the appendix of this report. It is probable that the concrete walls observed during exploration were part of the 1920's era structure.

Due to the limited area available for the exploration, the overall size of the structure is not known.

It is possible that this is a former vault or basement servicing the former 1920's era structure discussed above. The subterranean walls were most likely abandoned by filling the void with loose earth materials mixed with demolition debris. This office has observed similar conditions on other properties abandoned before the strict enforcements of building codes.

Over the years, as water percolated through the asphalt and fill materials, it pooled on the subterranean concrete slab. The pooling water wetted the fill causing the fill materials to consolidate. The consolidation of the fill created a void which over time became larger and disturbed the fill to the surface causing the distress observed in the asphalt.

Geotechnoloaies. Inc.
439 Western Avenue, Glendale, California 91201-2837 • Tel: 818.240.9600 • Fax: 818.240.9675 www.geoteq.com
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB

RECOMMENDATIONS
December 20, 2022
File No. 22304
Page4
The best overall method to return the restore the parking lot would be to excavate the area, remove the existing buried debris and concrete structures and refill the void with compacted earth materials. Existing fill materials could be reused, however they would need to be cleaned of oversize materials and deleterious debris. Oversized, non-deleterious materials could be crushed and reused in the compacted fill. Recommendations for use of crushed materials appear in the Grading Guidelines, below. This method would result in the highest quality subgrade for the parking lot.

As an alternative the concrete structures could be allowed to stay in place. The lower slab would require perforation to allow for drainage. A minimum 4 inch perforation should be a minimum of 8 feet on center. The concrete walls should be removed a minimum of 3 feet below the pavement subgrade. As much of the deleterious debris as possible should be removed. The resulting void should be refilled with compacted earth materials. Existing fill materials could be reused, however they would need to be cleaned of oversize materials and deleterious debris. Oversized, nondeleterious materials could be crushed and reused in the compacted fill. Recommendations for use of crushed materials appear in the Grading Guidelines, below. This method would not result in the highest quality subgrade for the parking lot. Pavement constructed in this manner will most likely have a shorter design life and increased maintenance costs.

These options would most likely require shutting down the entire parking lot and would require importation of earth materials to make up for the volume of the removed concrete structures and removed debris.

GRADING GUIDELINES
Site Preparation
• A thorough search should be made for possible underground utilities and/or structures. Any existing or abandoned utilities or structures located within the footprint of the proposed grading should be removed or relocated as appropriate.
• All vegetation, existing fill, and soft or disturbed geologic materials should be removed from the areas to receive controlled fill. All existing fill materials and any disturbed geologic materials resulting from grading operations shall be completely removed and properly recompacted prior to foundation excavation.
• Any vegetation or associated root system located within the footprint of the proposed structures should be removed during grading.

Geotechnoloaies. Inc.
439 Western Avenue, Glendale, California 91201-2837 • Tel: 818.240.9600 • Fax: 818.240.9675 www.geoteq.com
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB December 20, 2022
File No. 22304

Page 5 ends

• Subsequent to the indicated removals, the exposed grade shall be scarified to a depth of six inches, moistened to optimum moisture content, and recompacted in excess of the minimum required comparative density.
• The excavated areas shall be observed by the geotechnical engineer prior to placing compacted fill.

Compaction
Comparative compaction is defined, for purposes of these guidelines, as the ratio of the in-place density to the maximum density as determined by applicable ASTM testing.

All fill should be mechanically compacted in layers not more than 8 inches thick. The materials placed should be moisture conditions to within 3 percent of the optimum moisture content of the particular material placed. All fill shall be compacted to at least 90 percent of the maximum laboratory density for the materials used. The maximum density shall be determined by the laboratory operated by Geotechnologies, Inc. in general accordance with the most recent revision of ASTM D 1557.

Field observation and testing shall be performed by a representative of the geotechnical engineer during grading to assist the contractor in obtaining the required degree of compaction and the proper moisture content. Where compaction is less than required, additional compactive effort shall be made with adjustment of the moisture content, as necessary, until a minimum of90 percent compaction is obtained.

Acceptable Materials
The excavated onsite materials are considered satisfactory for reuse in the controlled fills as long as any debris and/or organic matter is removed.

Page 6 ends

Any imported materials shall be observed and tested by the representative of the geotechnical engineer prior to use in fill areas. Imported materials should contain sufficient fines so as to be relatively impermeable and result in a stable subgrade when compacted. Any required import materials should consist of geologic materials with an expansion index ofless than 20. The watersoluble sulfate content of the import materials should be less than 0.1 % percentage by weight.

Imported materials should be free from chemical or organic substances which could affect the proposed development. A competent professional should be retained in order to test imported materials and address environmental issues and organic substances which might affect the proposed development.

Utility Trench Backfill
Utility trenches should be backfilled with controlled fill. The utility should be bedded with clean sands at least one foot over the crown. The remainder of the backfill may be onsite soil compacted to 90 percent of the laboratory maximum density. Utility trench backfill should be tested by representatives of this firm in general accordance with the most recent revision of ASTM D 1557.

Wet Soils
At the time of exploration the soils which will be exposed during grading were locally above optimum moisture content. It is anticipated that the excavated material to be placed as compacted fill, and the materials exposed at the bottom of excavated plane will require significant drying and aeration prior to recompaction.

Pumping (yielding or vertical deflection) of the high-moisture content soils at the bottom of the excavation may occur during operation of heavy equipment. Where pumping is encountered, angular minimum ¾-inch gravel and/or crushed concrete should be placed and worked into the subgrade. The exact thickness of the gravel would be a trial and error procedure, and would be determined in the field. It would likely be on the order of 1 to 2 feet thick.

Page 7 ends

The gravel will help to densify the subgrade as well as function as a stabilization material upon which heavy equipment may operate. It is not recommended that rubber tire construction equipment attempt to operate directly on the pumping subgrade soils prior to placing the gravel.

Direct operation of rubber tire equipment on the soft subgrade soils will likely result in excessive disturbance to the soils, which in turn will result in a delay to the construction schedule since those disturbed soils would then have to be removed and properly recompacted. Extreme care should be utilized to place gravel as the subgrade becomes exposed.

Shrinkage
Shrinkage results when a volume of soil removed at one density is compacted to a higher density.

A shrinkage factor between 5 and 15 percent should be anticipated when excavating and recompacting the existing fill and underlying native geologic materials on the site to an average comparative compaction of 92 percent.

Weather Related Grading Considerations
When rain is forecast all fill that has been spread and awaits compaction shall be properly compacted prior to stopping work for the day or prior to stopping due to inclement weather. These fills, once compacted, shall have the surface sloped to drain to an area where water can be removed.

Temporary drainage devices should be installed to collect and transfer excess water to the street in non-erosive drainage devices. Drainage should not be allowed to pond anywhere on the site, and especially not against any foundation or retaining wall. Drainage should not be allowed to flow uncontrolled over any descending slope.

Work may start again, after a period of rainfall, once the site has been reviewed by a representative of this office. Any soils saturated by the rain shall be removed and aerated so that the moisture content will fall within three percent of the optimum moisture content.

Page 8 ends

Surface materials previously compacted before the rain shall be scarified, brought to the proper moisture content and recompacted prior to placing additional fill, if considered necessary by a representative of this firm.

Abandoned Seepage Pits
No abandoned seepage pits were encountered during exploration and none are known to exist on the site. However, should such a structure be encountered during grading, options to permanently abandon seepage pits include complete removal and backfill of the excavation with compacted fill, or drilling out the loose materials and backfilling to within a few feet of grade with slurry, followed by a compacted fill cap.

If the subsurface structures are to be removed by grading, the entire structure should be demolished. The resulting void may be refilled with compacted soil. Concrete and brick generated during the seepage pit removal may be reused in the fill as long as all fragments are less than 6 inches in longest dimension and the debris comprises less than 15 percent of the fill by volume.

All grading should comply with the recommendations of this report.

Where the seepage pit structure is to be left in place, the seepage pits should cleaned of all soil and debris. This may be accomplished by drilling. The pits should be filled with minimum 1-1/2 sack concrete slurry to within 5 feet of the bottom of the proposed foundations. In order to provide a more uniform foundation condition, the remainder of the void should be filled with controlled fill.

Geotechnical Observations and Testing During Grading
Geotechnical observations and testing during grading are considered to be a continuation of the geotechnical investigation. It is critical that the geotechnical aspects of the project be reviewed by representatives of Geotechnologies, Inc. during the construction process. Compliance with the design concepts, specifications or recommendations during construction requires review by this Geotechnoloaies. Inc.
439 Western Avenue, Glendale, California 91201-2837 • Tel: 818.240.9600 • Fax: 818.240.9675 www.geoteq.com
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB December 20, 2022
File No. 22304
Page9
firm during the course of construction. Any fill which is placed should be observed, tested, and verified if used for engineered purposes. Please advise this office at least twenty-four hours prior to any required site visit.

Proper compaction is necessary to reduce settlement of overlying improvements. Some settlement of compacted fill should be anticipated. Any utilities supported therein should be designed to accept differential settlement. Differential settlement should also be considered at the points of entry to the structure.

LEED Considerations
The Leadership in Energy and Environmental Design (LEED) Green Building Rating System encourages adoption of sustainable green building and development practices. Credit for LEED Certification can be assigned for reuse of construction waste and diversion of materials from landfills in new construction.

In an effort to provide the design team with a viable option in this regard, demolition debris could be crushed onsite in order to use it in the ongoing grading operations. The environmental ramifications of this option, if any, should be considered by the team.

The demolition debris should be limited to concrete, asphalt and other non-deleterious materials.

All deleterious materials should be removed including, but not limited to, paper, garbage, ceramic materials and wood.

For structural fill applications, the materials should be crushed to 2 inches in maximum dimension or smaller. The crushed materials should be thoroughly blended and mixed with onsite soils prior to placement as compacted fill. The amount of crushed material should not exceed 20 percent. The blended and mixed materials should be tested by this office prior to placement to ensure it is suitable for compaction purposes. The blended and mixed materials should be tested by Geotechnologies, Inc. during placement to ensure that it has been compacted in a suitable manner.

Geotechnoloaies. Inc.
439 Western Avenue, Glendale, California 91201-2837 • Tel: 818.240.9600 • Fax: 818.240.9675 www.geoteq.com
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB

PAVEMENTS
December 20, 2022
File No. 22304

Page 10 ends

Prior to placing paving, the existing grade should be scarified to a depth of 12 inches, moistened as required to obtain optimum moisture content, and recompacted to 90 percent of the maximum density as determined by the most recent revision of ASTM D 1557. The following pavement sections are recommended:

Service Asphalt Pavement Thickness Base Course
Inches Inches
Passenger Cars 3 4
Moderate Truck 4 6
Aggregate base should be compacted to a minimum of 95 percent of the most recent revision of ASTM D 1557 laboratory maximum dry density. Base materials should consist of Crushed Aggregate Base which conform with Section 200-2.2 of the most recent edition of "Standard Specifications for Public Works Construction", (Green Book).

The performance of pavement is highly dependent upon providing positive surface drainage away from the edges. Ponding of water on or adjacent to pavement can result in saturation of the subgrade materials and subsequent pavement distress. If planter islands are planned, the perimeter curb should extend a minimum of 12 inches below the bottom of the aggregate base. In addition where landscaping is planned adjacent to pavement, it is recommended that a cutoff wall should be provided along the edge of the pavement. The cutoff wall should extend at least 12 inches below the depth of the base course.

Geotechnoloaies. Inc.
439 Western Avenue, Glendale, California 91201-2837 • Tel: 818.240.9600 • Fax: 818.240.9675 www.geoteq.com
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB

SITE DRAINAGE
December 20, 2022
File No. 22304

Page 11 ends

Proper surface drainage is critical to the future performance of the project. Saturation of a soil can cause it to lose internal shear strength and increase its compressibility, resulting in a change in the designed engineering properties. Proper site drainage should be maintained at all times.

All site drainage should be collected and transferred to the street in non-erosive drainage devices.

The proposed structure should be provided with roof drainage. Discharge from downspouts, roof drains and scuppers should not be permitted on unprotected soils within five feet of the building perimeter. Drainage should not be allowed to pond anywhere on the site, and especially not against any foundation or retaining wall. Drainage should not be allowed to flow uncontrolled over any descending slope. Planters which are located within a distance equal to the depth of a retaining wall should be sealed to prevent moisture adversely affecting the wall. Planters which are located within five feet of a foundation should be sealed to prevent moisture affecting the earth materials supporting the foundation.

EFH:ln
E-Mail to: [[email protected]]
Enclosures: Vicinity Map
Geologic Map
Seismic Hazards Map
Historic High Groundwater Map
Plot Plan
1920's Pacific Railway Plan
Plate B-1
Plate D
Geotechnoloaies. Inc.
439 Western Avenue, Glendale, California 91201-2837 • Tel: 818.240.9600 • Fax: 818.240.9675 www.geoteq.com
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB

0.5 1000 500

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0 KILOMETERS
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REFERENCE: US.G.S TOPOGRAPHIC MAPS, 7.5 MINUTE SERIES, BEVERLY HILLS, CA QUADRANGLE 2022

VICINITY MAP
Geotechnolouies, Inc.

Consulting Geotechnical Engineers

CITY OF BEVERLY HILLS-PROJECT ADMINISTRATION
344 FOOTHILL RD., BEVERLY HILLS
FILE NO: 22304
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB 1«IJ 300] 9JOO ,woo
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LEGEND
Qoa: Older alluvium of gray to light brown pebble-gravel, sand, silt and clay derived from Santa Monica Mountains; slightly consolidated; in Baldwin Hills designated as Baldwin Hills sandy gravel by Weber et al, 1982, where it is much dissected and eroded.

Qa: Alluvial gravel, sand and silt-clay, derived mostly from Santa Monica Mountains; inlcudes gravel and sand stream channels.

Qae: Alluvial fan sediments of granitic sand at West Hollywood, derived from adjacent Santa Monica Mountains. sms: Dark bluish gray slate-phyllite, weathers brown; cleavage parallel to bedding; metamorphosed from shale, possibly in part from graywacke; fine grained, composed of mica, quartz, and feldspar; in eastern exposures cleavage planes spotted with dark microflake clusters of biotite on cordierite (Hoots 1931 ); in places contains veinlets of quartz; slate hard, platy, but much fractured, commonly sheared; weathers to reddish brown soil.
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REFERENCE: T.W. DIBBLEE (EDITED 2010) GEOLOGIC MAP OF THE BEYERL Y HILLS & SOUTH HALF VAN NUYS QUADRANGLES (#DF-31)

LOCAL GEOLOGIC MAP DIBBLEE
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Geotechnolouies, Inc. CITY OF BEYERL Y HILLS-PROJECT ADMINISTRATION 344 FOOTHILL RD., BEYERL Y HILLS
Consulting Geotechnical Engineers FILE NO: 22304
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB 1000 7000 FEET
a::::a:::a=====i:=====3:=====:E======i=====::E====C::=====i 0 7000 2000 3000 4000 5000 6000 .5
LEGEND
~ LIQUEFACTION ZONE
~ EARTHQUAKE- INDUCED LANDSLIDE ZONE
REFERENCE: SEISMIC HAZARD ZONES MAP BEYERL Y HILLS QUADRANGLE, CA 1999 0 1 KILOMmR

SEISMIC HAZARD ZONE MAP
Geotechnolouies, Inc.

Consulting Geotechnical Engineers

CITY OF BEYERL Y HILLS-PROJECT ADMINISTRATION
344 FOOTHILL RD., BEYERL Y HILLS
FILE NO: 22304
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB

ONE MILE
SCALE
LEGEND
• Borehole Site
,-. .Jo __.. Depth to ground water in feet
REFERENCE: SEISMIC HAZARD ZONE REPORT, 023BEVERL Y HILLS, 7.5 - MINUTE QUADRANGLE, LOS ANGELES COUNTY, CALIFORNIA 1998

HISTORICALLY HIGHEST GROUNDWATER LEVELS
Geotechnologies, Inc.

Consulting Geotechnical Engineers

CITY OF BEYERL Y HILLS-PROJECT ADMINISTRATION
344 FOOTHILL RD., BEYERL Y HILLS
FILE NO: 22304
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21 BB N 0 N
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TP1$- LOCA TTON & NUMBER OF TEST PIT

PLOT PLAN
Geotechnologies, Inc. CITY OF BEYERL Y HILLS-PROJECT ADMINISTRATION 344 FOOTHILL RD., BEYERL Y HILLS
Consulting Geotechnical Engineers Drawnby: YD File No.: 22304 Date: December 2022
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21 BB N 0 N
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REFERENCE: 1920 S PACIFIC RW AND TRACK MAP PROVIDED BY THE CITY OF BEYERL Y HILLS DATED: NONE
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LEGEND
TP1$- LOCATION & NUMBER OF TEST PIT
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1920 S PACIFIC RW AND TRACK MAP
Geotechnologies, Inc. CITY OF BEYERL Y HILLS-PROJECT ADMINISTRATION 344 FOOTHILL RD., BEYERL Y HILLS
Consulting Geotechnical Engineers Drawnby: YD File No.: 22304 Date: December 2022
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SAMPLE SOIL TYPE

DRY INITIAL FINAL
DENSITY (PCF) MOISTURE(%) MOISTURE(%) 3.5 .---1------------------------------t---, SAMPLE Al SC/SW 121.7 7.1 15.1

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• Direct Shear, Saturated Normal Pressure (KSF)

SHEAR TEST DIAGRAM
Geotechnologies, Inc.

Consulting Geotechnical Engineers

CITY OF BEYERL Y HILLS-PROJECT ADMINISTRATION
344 FOOTHILL RD., BEYERL Y HILLS
FILE NO: 22304 I PLATE: B-1
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB ASTM D-1557
SAMPLE SAMPLE Al

SOIL TYPE SC/SW
MAXIMUM DENSITY PCF. 131.0
OPTIMUM MOISTURE % 8.4
ASTMD4829
SAMPLE

SOIL TYPE

EXP ANSI ON INDEX
UBC STANDARD 18-2

EXP ANSI ON CHARACTER
SAMPLE Al
SC/SW

VERY LOW

SULFATE CONTENT
SAMPLE
SULFATE CONTENT:
(PERCENTAGE BY WEIGHT)
SAMPLE Al
<0.2%

COMPACTION/EXPANSION/SULFATE DATA SHEET
Geotechnologies, Inc.

Consulting Geotechnical Engineers

CITY OF BEYERL Y HILLS-PROJECT ADMINISTRATION
344 FOOTHILL RD., BEYERL Y HILLS
FILE NO: 22304 I PLATE: D
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB 317 S. Isis Avenue, STE 207
Inglewood, California 90301
Tel (310) 854 - 6300
Fax (310) 854 - 0199
efiglobal.com
CSLB License No. 885902
Date:

To:

Subject:

January 23, 2023
Karen Domerchie
Project Manager

TECHNICAL MEMORANDUM
City of Beverly Hills - Department of Public Works
345 Foothill Road
Beverly Hills, California 90210
Environmental Soil Investigation
344 Foothill Road
Beverly Hills, California 90210
@ efi global
EFI Global, Inc., (EFI) has prepared this Technical Memorandum to summarize the environmental soil investigation of the sinkhole located at the Mercedes-Benz parking lot of 344 Foothill Road in Beverly Hills, California (Figure 1; the Site). The purpose of the soil investigation was to assess shallow soils for the presence of arsenic to protect workers, the nearby community, offsite pedestrians, and vehicle traffic around the Site during the planned soil excavation and repair of the parking lot, and to determine the waste characteristics of soil for future off-site transport and disposition. To achieve project objectives, EFI advanced three soil borings around the perimeter of the sinkhole to a maximum depth of 5.5 feet below ground surface (bgs) to facilitate the collection of soil samples for off-site laboratory analysis.

Arsenic is the primary soil contaminant of concern. Assessments performed at nearby sites have found arsenic concentrations in soil above normal background for California soils. With the exception of arsenic, other metals have been detected but within normal background concentrations. The local background concentration for arsenic (25 milligrams per kilogram [mg/kg]) was established for Lots 12 and 13 off Civic Center Drive, approximately 500 feet north of the Site. For Lots 12 and 13, the Department of Toxic Substances Control (DTSC) established the upper-bound arsenic concentration of 25 mg/kg, which it considered to be representative of background conditions at the Lots and recommended an arsenic cleanup goal of 25 mg/kg for those areas where future receptors may contact surface soils. DTSC also noted that higher concentrations of arsenic may be left in the soil depending on site-specific considerations, such as road or other similar caps or covering that would limit exposure 1.

For Lots 12 and 13, removal action goals were selected based on the DTSC cleanup guidelines2 developed to assist developers and financial institutions determine accurate costs associated with potential development of the Lots as follows:
1 Jacobs Engineering Group Inc. (Jacobs), Removal Action Work Plan, Union Pacific Railroad Beverly Hills Site, 9315 Civic Center Drive, Beverly Hills, California-Final, February 2021 .
2 California Department ofToxic Substance Control (DTSC), Arsenic Cleanup Levels Regarding Lot 12 and 13 Site, Beverly Hills, California, May 21 , 2012.

Page 1 of 5 ends

DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21 BB Technical Memorandum - Environmental Soil Investigation 344 Foothill Road, Beverly Hills, CA 90210
January 23, 2023
• Landscape Areas (such as ground level planters and open space):
o Oto 2 feet bgs less than 25 mg/kg;
o 2 to 5 feet bgs less than 75 mg/kg; and
o Greater than 5 feet bgs left in place.
• Hardscape Areas (such as under buildings, parking lots, and sidewalks):
o 0 to 3 feet bgs less than 75 mg/kg; and
o Greater than 3 feet bgs left in place.

Therefore, while the background concentration of arsenic is determined to be 25 mg/kg, the cleanup goals are dependent on the exposure risk which is affected by the type of ground surface and depth of soil.

PRE-FIELD ACTIVITIES
Utility Clearance
Prior to conducting field activities, EFI Global personnel marked the work area with white paint. Underground Service Alert (USA) was notified of the pending fieldwork a minimum of two full working days before mobilization.

The proposed boring locations were subsequently checked for utility conflicts, access limitations, and other hindrances or issues that may have been encountered during fieldwork.

Health and Safety Plan
A site- and scope-specific Health and Safety Plan was prepared for the proposed fieldwork and implemented during field activities. A safety meeting ("Tailgate Meeting") was also conducted prior to commencement of the workday.

SOIL ASSESSMENT
The soil sampling activities were conducted on October 14, 2022. A total of three soil borings (B1, B2, and B3) were advanced and are shown on Figure 2. Borings were generally positioned around three sides of the sinkhole to provide representative coverage of the assessment area and were drilled within approximately one foot from the edge of the sinkhole.

Sample Collection and Handling Procedures
An experienced and qualified environmental professional working under the direct supervision of a California Registered Civil Engineer (PE) performed sample collection and prepared field documentation. All soil samples were logged in general accordance with the Unified Soil Classification System (USCS) and observed for color, moisture content, texture, discoloration, odor, and physical evidence of contaminant impact or fill material. Soil samples were also field screened for volatile organic compounds (VOCs) using a photoionization detector (PIO) calibrated against hexane. Soil descriptions and PIO readings are contained in the boring logs (Appendix A).

During sampling, each location was sampled using a hand auger from ground surface to a maximum depth of approximately 5.5 feet bgs, prior to encountering refusal. Samples were collected at depth intervals of 1.5-2 feet bgs and 4.5-5 feet bgs. Discrete samples for arsenic analysis were collected in a plastic re-sealable storage bag and homogenized. A portion of soil from each sample depth and location was transferred to a separate plastic re-sealable storage bag and homogenized to generate a composite sample for waste profiling purposes. The homogenized soil for discrete and composite samples were transferred into 8-ounce, pre-cleaned, laboratoryprovided glass jars with a polyurethane lid, logged in a chain-of-custody, and placed in an ice chest pending ~ efi global Page 2of5
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21 BB Technical Memorandum - Environmental Soil Investigation 344 Foothill Road, Beverly Hills, CA 90210
January 23, 2023
laboratory analysis. To identify and manage samples obtained in the field, a sample label was affixed to each sample container.

Equipment Decontamination
Prior to soil sampling activities, hand tools were cleaned and allowed to air dry. Sampling equipment that came in contact with samples was decontaminated in a designated decontamination area. Equipment was generally decontaminated using the following procedure before its initial use and after use at each sampling location:

1. Scrub and wash with a solution of potable water and Alconox (or other non-phosphate detergent);

2. Double rinse with potable tap water; and

3. Air-dry equipment on a clean surface.

Cleaned equipment was stored in a clean area, and potentially contaminated equipment were kept separate during all activities.

Chemical Analysis
A total of six samples were analyzed for arsenic by EPA Method 601 OB. The waste profile composite sample was analyzed for Title 22 metals by EPA Method 6010B/7471A, voes by EPA Method 82608, and total petroleum hydrocarbons (TPH) quantified as gasoline, diesel, and oil by EPA Method 80158. All samples were submitted to Positive Lab Service, Inc. (Positive) for laboratory analysis.

Laboratory reports are included in Appendix B.

Encountered Soil Types
Sediments beneath the Site consisted primarily of poorly graded gravel with silt and sand (USCS symbol "GP-GM") in the upper foot of the soil column, followed by gravelly silt with sand (ML) to approximately 4 feet bgs, and well graded sand with gravel (SW) near the bottom foot of each boring. Sands were generally described as light brown to brown, dry to moist, and fine to coarse grained. Silts were generally described as dark brown, moist, medium stiffness, and low plasticity. Refusal was encountered at 5.5 feet bgs in borings 81 and 82, and 5 feet bgs in boring 83. Groundwater was not encountered in any of the soil borings.

No obvious indications of discoloration, staining, odors, etc. were observed during the soil sampling activities. The maximum PID measurement was 3.2 parts per million (ppm), which is not uncommon of typical background conditions. Brick, steel, wiring, and concrete fragments were found in some of the borings; however, none of them appeared to be indicative of other contaminants of potential concern.

Soil Results and Discussion
A summary of arsenic analytical results for discrete-depth soil samples is provided in Table 1. Title 22 metals and TPHNOCs results for the waste profile composite sample are provided in Tables 2 and 3, respectively.

Concentrations of arsenic ranged from 11 .0 mg/kg in sample 81-S-5 (5-foot depth) to 25. 7 mg/kg in sample 83-S-5 (5-foot depth), with an average concentration of 17.1 mg/kg. All arsenic concentrations were below the assumed local arsenic background level of 25 mg/kg, with the exception of the concentration reported in sample 83-8-5 (5-foot depth). Arsenic concentrations exceeded the DTSC California background concentration of 12 mg/kg in all but one sample (81-8-5; 5-foot depth).

Since the arsenic concentrations in all soil samples at a depth of 2 feet were less than 25 mg/kg, they were below the background concentration in the area and the removal action goal even for a Landscape Area scenario.

However, since the area is paved (hardscaped) and used as parking lot, removal action goals would be higher and below a depth of 3 feet, the soil left in place. Thus, the extent of soil removal will be dictated by the excavation required for the repair of the sinkhole and not by the removal of arsenic in soil. ~ efi global Page 3 of 5
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB Technical Memorandum - Environmental Soil Investigation 344 Foothill Road, Beverly Hills, CA 90210
January 23, 2023
Metals detected in the waste profile composite sample were below the total threshold concentration limits for those elements. TPH quantified as gas and oil and all VOCs were non-detect. TPH quantified as diesel was detected at a very low concentration of 3.04 mg/kg, just above the laboratory report limit of 2.50 mg/kg. This low detection of TPH does not represent a human health risk for soils that will remain in place, nor does it exceed any threshold limits for waste classification.

Based on the composite results, future soil export from the immediate vicinity of the sinkhole can be considered non-hazardous. However, the soil should not be reused and should be considered a regulated waste for disposal at a regulated landfill.

CONCLUSIONS AND RECOMMENDATIONS
An environmental soil investigation was performed near the sinkhole located at the Mercedes-Benz parking lot of 344 Foothill Road in Beverly Hills, California. The purpose of the soil investigation was to assess shallow soils for the presence of arsenic to protect workers, the nearby community, offsite pedestrians, and vehicle traffic around the site during the planned soil excavation and repair of the parking lot, and to determine the waste characteristics of soil for future off-site transport and disposition. To achieve project objectives, EFI advanced three soil borings around the perimeter of the sinkhole to a maximum depth of 5.5 feet bgs to facilitate the collection of soil samples for off-site laboratory analysis.

Arsenic concentrations in the discrete-depth soil samples ranged from 11 .0 mg/kg to 25.7 mg/kg; the average concentration for all samples was 17 .1 mg/kg. The arsenic concentrations were similar to the concentrations detected in soil samples collected at the Dog Park Facility, adjoining the Site to the west3. Arsenic concentrations were above DTSC's screening level of 12 mg/kg in all but one sample. In addition, only one arsenic detection (at the 5-foot depth) was reported at a concentration greater than the assumed local background concentration of 25 mg/kg.

Based on the results of this assessment, EFI recommends the following:
• Implement dust control measures during excavation/repair of the sinkhole. • Perform air monitoring and site work observations during future excavation work associated with the repair of the parking lot.
• Future soil export from the immediate vicinity of the sinkhole can be classified as non-hazardous waste; however, the soil should be considered a regulated waste and disposed of at a regulated landfill. • Prepare a site work monitoring and observation report to summarize completion of the work. 3 Lindmark Engineering, Inc. (LE), Removal Action Work Plan, City of Beverly Hills Dog Park, March 25, 2016. @ efi global Page 4 of 5
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB Respectfully submitted,
Daniel Jablonski
Senior Project Manager
EFI Global, Inc.

Ulf Lindmark, PE, BCEE
Senior Principal Engineer
EFI Global, Inc.

Attachments:

Site Location Map
Site Plan
Arsenic in Soil
Title 22 Metals in Soil
TPH and voes in Soil
Soil Boring Logs
Technical Memorandum - Environmental Soil Investigation 344 Foothill Road, Beverly Hills, CA 90210
January 23, 2023
Figure 1
Figure 2
Table 1
Table 2
Table 3
Appendix A
Appendix B Laboratory Analytical Reports and Chain of Custody Documentation ~ efi global Page 5of5

FIGURES
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB @ efi global
Figure 1
Site Location Map
344 Foothill Road
Beverly Hills, California 90210
Source:

USGS Beverly Hills, CA 7.5 Minute
Topographic Map (1995)
Project Number: 045.09844
SITE
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB z
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ALDEN DRIVE FOOTHILL ROAD B1
B3 B2

APPROXIMATE EXTENT

OF SINKHOLE
FIGURE
LEGEND
DT:

PN:

DB: CB:

I:\AE 2022\Projects 2022\045 Projects 2022\045.09844_344 Foothill Rd Beverly Hills CA 90210\05 045.09844_Reports\Phase II ESA\02 CAD\045.09844_SITE_PLAN KK DJ 2
045.09844
N
0APPROX. SCALE: 1"=
40' 40' 20' SITE PLAN
344 FOOTHILL ROAD
BEVERLY HILLS, CA 90210

SITE BOUNDARY

SOIL BORING LOCATION

APPROXIMATE EXTENT OF SINKHOLE
BASEMAP SOURCE: BING MAPS.
10/25/2022
B3
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB • @ efi global
0 TABLES
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB @ efi global
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21 BB Table 1: Arsenic in Soil
344 Foothill Road, Severy Hills, California 90210
Sample Sample Sample Depth S I T A - ID Date (ft bgs) amp e ype rsenic EPA Method 6010B
Units mg/kg
B1-S-2 10/14/2022 1.5-2 Discrete 15.6
B1-S-5 10/14/2022 4.5-5 Discrete 11.0
B2-S- 0/1 /2022 1. -2 iscrete 16.1
B2-S-5 10/14/2022 4.5-5 Disc ete 15.3
B3-S-2 10/14/2022 1.5-2 Discrete 18.8
B3-S-5 10/14/202 4.5-5 Discrete 25.7
Notes:
1 The local background concentration for arsenic (25 mg/kg) was established for Lots 12 and 13 off Civic Center Drive, approximately 500 feet north of the Site. 2 DTSC HERO HHRA Note 11, December 28, 2020, establishes 12 mg/kg as a screening tool for sites throughout southern California where natural background concentrations of arsenic in soils are often well above DTSC Screening Levels.

Detections are noted in bold; detections shaded yellow exceed DTSC Screening Level of 12 mg/kg; detections shaded orange exceed the assumed Local Background Concentration of 25 mg/kg.

Abbreviations:

DTSC = Department of Toxic Substances Control
EPA= United States Environmental Protection Agency
ft bgs = feet below ground surface
mg/kg = milligrams per kilogram
@ efi global Page 1 of 3
DocuSign Envelope ID: 8E39A809-3968-47C7-9EAD-65EACCAE2188 Sample Sample Sample Type ID Date
EPA Method
Type
Units
TTLC California Hazardous Waste Limit
STLC California Hazardous Waste Limit
TCLP RCRA Hazardous Waste Limit
10x STLC Trigger Value
20x TCLP Trigger Value
Notes:

Detections are noted in bold.
- = Not Established/Not Applicable
Abbreviations:

EPA = United States Environmental Protection Agency
ft bgs = feet below ground surface
mg/kg = milligrams per kilogram
mg/L = milligrams per liter
ND = not detected above laboratory reporting limit
Antimony Arsenic Barium
60108 60108 6010B

TTLC TTLC TTLC
mg/kg mg/kg mg/kg
l&l'!E!II 500 500 10,000
15 5 100
5 100
150 50 1000
100 2,000
Table 2: Title-22 Metals in Soil
344 Foothill Road, Beverly Hills, California 90210
Beryllium Cadmium Chromium Cobalt Copper Lead
60108 6010B 60108 60108 6010B 6010B 60108

TTLC TTLC TTLC TTLC TTLC TTLC STLC
mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/L
&m!I!I 75 100 2,500 8,000 2,500 1,000

0.75 5 80 25

7.5 10 50 800 250 50
20 100 100
Molybdenum Nickel Selenium Silver Thallium Vanadium Zinc Mercury 6010B 60108 6010B 6010B 60108 6010B 6010B 6010B 7471A

TCLP TTLC TTLC TTLC TTLC TTLC TTLC TTLC TTLC
mg/L mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg mg/kg
DBD&m!I!IDBD mmra 3,500 2,000 100 500 700 2,400 5,000 20 350 20 5 7 24 250 0.2
5 0.2
3500 200 10 50 70 240 2500
20 100 4
STLC = Soluble Threshold Limit Concentration in milligrams per liter (mg/L) as identified in Title 22 of the California Code of Regulations. A concentration of ten times the STLC is sometimes used as a trigger to conduct further analysis (i.e., the soluble analysis) of a sample to determine disposal requiremenls. Wastes with soluble concentrations above this value are considered hazardous for the purposes of disposal under California regulations.

TCLP = Toxicity Characteristic Leaching Procedure concentration in mg/Las identified in the Code of Federal Regulations. A concentration of 20 times the TCLP is sometimes used as a trigger to conduct further analysis (i.e., the soluble analysis) of a sample to determine disposal requirements. Wastes with soluble concentrations above this value are considered hazardous for the purposes of disposal under federal regulations.

TTLC = Total Threshold Limit Concentration as identified in Title 22 of the California Code of Regulations. Waste with concentrations above this value are considered hazardous for the purposes of disposal under Cal~ornia regulations. @ efi global Page 2 of3
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21 BB Table 3: TPH and voes in Soil
344 Foothill Road, Beverly Hills, California 90210
Notes:

Detections are noted in bold
Abbreviations:

EPA= United States Environmental Protection Agency
mg/kg = milligrams per kilogram
µg/kg = micrograms per kilogram
ND= Not detected above laboratory reporting limit
TPH-g = total petroleum hydrocarbons in the gasoline range TPH-d = total petroleum hydrocarbons in the diesel range TPH-o = total petroleum hydrocarbons in the oil range
VOCs = volatile organic compounds
@ efi global Page 1 of 1

APPENDIX A
Soil Boring Logs
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB @ efi global

BORING PAGE
OF
1ST ENCOUNTERED GROUNDWATER:

SITE ADDRESS:

DATE(S) DRILLED:

DRILLING METHOD:

DRILLING CONTRACTOR:

LOGGED BY:

PROJECT NO.:

START:

DRILLING RIG:

SAMPLING METHOD:

SURFACE:

TERMINAL DEPTH:

STATIC GROUNDWATER:

END: BORING DIAMETER:
344 FOOTHILL ROAD, BEVERLY HILLS, CA 90210 045.09844
EFI
P. S.

BGS - BELOW GROUND SURFACE 3"

PID - PHOTOIONIZATION DETECTOR

R - RECOVERY

SAA - SAME AS ABOVE

SI - SAMPLE INTERVAL
APPROVED BY: U.L.

B1
07:50 08:30

ASPHALT
8 OZ JARS
HAND AUGER N/A 5.5' BGS
NA
NA
1 1
10/14/2022
1 DESCRIPTION COMPLETION DEPTH
(FEET) PID

READING
USCS
CLASS

LITHOLOGIC
SYMBOL
SAMPLE
TIME
BLOW
COUNT
SAMPLE

ID R SI
2 3
4 5
3" ASPHALT
8:10 B1-S-5 0.0/2.2
@2.5'; SAA; SOFT; VOID SPACE
8:05 B1-S-2 0.0/3.2
GP-GM POORLY GRADED GRAVEL WITH SILT AND SAND; FINE TO COARSE GRAVEL; FINE TO MEDIUM SAND; LIGHT BROWN; DRY TO MOIST; MEDIUM DENSITY 0.0/-- GRAVELLY SILT WITH SAND; FINE GRAVEL; FINE SAND; DARK BROWN; MOIST; MEDIUM STIFFNESS; LOW PLASTICITY ML

0.0/--
WELL GRADED SAND WITH GRAVEL; FINE GRAVEL; FINE TO COARSE SAND; BROWN; MOIST
SW
BORING TERMINATED AT 5.5' BGS;
REFUSAL; ROCK FRAGMENTS;

NO GROUNDWATER ENCOUNTERED

AMBIENT/ HEADSPACE

0.0/--
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB @ efi global 1---------------~---~~-/
I
-
( IN j
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

BORING PAGE
OF
1ST ENCOUNTERED GROUNDWATER:

SITE ADDRESS:

DATE(S) DRILLED:

DRILLING METHOD:

DRILLING CONTRACTOR:

LOGGED BY:

PROJECT NO.:

START:

DRILLING RIG:

SAMPLING METHOD:

SURFACE:

TERMINAL DEPTH:

STATIC GROUNDWATER:

END: BORING DIAMETER:
344 FOOTHILL ROAD, BEVERLY HILLS, CA 90210 045.09844
EFI
P. S.

BGS - BELOW GROUND SURFACE 3"

PID - PHOTOIONIZATION DETECTOR

R - RECOVERY

SAA - SAME AS ABOVE

SI - SAMPLE INTERVAL
APPROVED BY: U.L.

B2
08:30 09:00

ASPHALT
8 OZ JARS
HAND AUGER N/A 5.5' BGS
NA
NA
1 1
10/14/2022
1 DESCRIPTION COMPLETION DEPTH
(FEET) PID

READING
USCS
CLASS

LITHOLOGIC
SYMBOL
SAMPLE
TIME
BLOW
COUNT
SAMPLE

ID R SI
2 3
4 5

3.5" ASPHALT
8:45 B2-S-5 0.0/3.1
@2.5'; JUNK WIRING
8:40 B2-S-2 0.0/2.5
GP-GM POORLY GRADED GRAVEL WITH SILT AND SAND; FINE TO COARSE GRAVEL; FINE

0.0/-- TO MEDIUM SAND; LIGHT BROWN; DRY TO MOIST; MEDIUM DENSITY ML

0.0/--
WELL GRADED SAND WITH GRAVEL; FINE GRAVEL; FINE TO COARSE SAND; BROWN; MOIST
SW
BORING TERMINATED AT 5.5' BGS;
REFUSAL; ROCK FRAGMENTS;

NO GROUNDWATER ENCOUNTERED
GRAVELLY SILT WITH SAND; FINE GRAVEL; FINE SAND; DARK BROWN; MOIST; MEDIUM STIFFNESS; LOW PLASTICITY
@3'; SAA; SOFT; VOID SPACE

0.0/-- @4'; SAA; MEDIUM STIFFNESS

AMBIENT/ HEADSPACE
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB @ efi global I/
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BORING PAGE
OF
1ST ENCOUNTERED GROUNDWATER:

SITE ADDRESS:

DATE(S) DRILLED:

DRILLING METHOD:

DRILLING CONTRACTOR:

LOGGED BY:

PROJECT NO.:

START:

DRILLING RIG:

SAMPLING METHOD:

SURFACE:

TERMINAL DEPTH:

STATIC GROUNDWATER:

END: BORING DIAMETER:
344 FOOTHILL ROAD, BEVERLY HILLS, CA 90210 045.09844
EFI
P. S.

BGS - BELOW GROUND SURFACE 3"

PID - PHOTOIONIZATION DETECTOR

R - RECOVERY

SAA - SAME AS ABOVE

SI - SAMPLE INTERVAL
APPROVED BY: U.L.

B3
09:05 10:30

ASPHALT
8 OZ JARS
HAND AUGER N/A 5' BGS
NA
NA
1 1
10/14/2022
1 DESCRIPTION COMPLETION DEPTH
(FEET) PID

READING
USCS
CLASS

LITHOLOGIC
SYMBOL
SAMPLE
TIME
BLOW
COUNT
SAMPLE

ID R SI
2 3
4 5

3.5" ASPHALT
10:00 B3-S-5 0.0/0.3
@3'; SAA; CONCRETE FINE FRAGMENTS; METAL FINE FRAGMENTS; BRICK FINE FRAGMENTS;
9:20 B3-S-2 0.0/0.1
GP-GM POORLY GRADED GRAVEL WITH SILT AND SAND; FINE TO COARSE GRAVEL; FINE TO MEDIUM SAND; LIGHT BROWN; DRY TO MOIST; MEDIUM DENSITY 0.0/-- GRAVELLY SILT WITH SAND; FINE GRAVEL; FINE SAND; DARK BROWN; MOIST; MEDIUM STIFFNESS; LOW PLASTICITY ML

0.0/--
WELL GRADED SAND WITH GRAVEL; FINE GRAVEL; FINE TO COARSE SAND; BROWN; MOIST
SW
BORING TERMINATED AT 5' BGS;
REFUSAL; ROCK FRAGMENTS;

NO GROUNDWATER ENCOUNTERED
@3.5'; SAA; 1.5" METAL LINE; POSSIBLE JUNK
*1.5" AUGER USED TO ADVANCE BEYOND PIPE

ATTEMPTS MADE
1st: ADJACENT TO SINKHOLE; CAVE IN @2'
2nd: 1.5" METAL PIPE @3.5'; RETURN TO ATTEMPT; ABLE TO ADVANCE WITH

1.5" AUGER TO 5'
3rd: CONCRETE/POSSIBLE LINE @1.5'
4th: CONCRETE DEBRIS @2.5'

AMBIENT/ HEADSPACE
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+ + + + + j- + + + +
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+ + + + + j- + + + +
l

APPENDIX B
Laboratory Analytical Reports and Chain-of-Custody Documentation DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB @ efi global
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB

POSITIVE

LAB SERVICE
781 East Washington Blvd., Los Angeles, CA 90021
(213) 745-5312 FAX(213)745-6372
October 21, 2022
Daniel Jablonski
EFI Global
317 S. Isis Avenue, Suite 207
Inglewood, CA 90301
Report No.: 2210163 Project Name: 045.09844 - 344 Foothill Rd., Beverly Hills, 90210 Dear Daniel Jablonski,
This report contains the analytical results for the sample(s) received under chain of custody(s) by Positive Lab Service on October 14, 2022.

The test results in this report are performed in compliance with ELAP accreditation requirements for the certified parameters. The laboratory report may not be produced, except in full, without the written approval of the laboratory.

The issuance of the final Certificate of Analysis takes precedence over any previous Preliminary Report. Preliminary data should not be used for regulatory purposes. Authorized signature(s) is provided on final report only.

If you have any questions in reference to this report, please contact your Positive Lab Service coordinator.

Page 1 of 10 ends

DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB POSI E

LAB SERVICE
781 East Washington Blvd., Los Angeles, CA 90021
(213) 745-5312 FAX (213) 745-6372
Certificate of Analysis Page 2 of 10
File #:74354
EFI Global
317 S. Isis Avenue, Suite 207
Inglewood, CA 90301
Attn: Daniel Jablonski Phone: (310) 854-6300
Project: 045.09844 - 344 Foothill Rd., Beverly Hills, 90210 FAX:(310) 854-0199
Report Date: 10/21/22
Submitted: 10/14/22
PLS Report No.: 2210163
lsarnri1e1t>::w., .. s ···•soir c2210:1.53~0±>:.·.s~mri1ed:ioliM2i:1.i:oo R~~e1vedi;1.9/:1.-t122.···••··.••··.···· • ii Analyte Results Flag D.F. Units PQL Prep/fest Method Prepared Analyzed By Batch __ l_:l'!:l_Cj: ~1_2 __ --- _ -- _ --- __ -- _Np __ -- -- __ -- _ 1 ___ mg/kg __ il·~~o __ §Pj--_5~3_013 ___ E_P!,_8Q1_5~ __ ·- 10/17/22 _ -· _ 10/17/22 ___ ri:i~ __ B~2}~3_5_ Surrogate: a,a,a-Trifluorotoluene 97.3 % 41-131 EPA 50308 EPA 80158 10/17/22 10/17/22 mb BJ21835 Analyte Results Flag D.F. Units PQL Prep/Test Method Prepared Analyzed By Batch TPH C13 - C22 3.04 mg/kg 2.50 EPA 3550C EPA 80158 10/17/22 10/21/22 rp BJ21936 TPH C23 - C32 ND 1 mg/kg 100 EPA 3550C EPA 80158 10/17/22 10/21/22 rp BJ21936 __ '..P!:J _C~3_ -_(_3§ ________________ Np ___________ 1 ___ mg/kg ___ l_OQ __ §P_A_3~~o_s ___ E_P!, _8~1_5~ ___ 10/]7/22 ___ 10/21/22 ___ ."P __ Bp_1~3_6 Surrogate: n-Tetracosane 122 % 46-149 EPA 3550C EPA 80158 10/17/22 10/21/22 rp BJ21936 Analyte Results Flag D.F. Units PQL Prep/Test Method Prepared Analyzed By Batch Dichlorodlfluoromethane (FC-12} ND 1 ug/kg 4.00 EPA 50308 EPA 8260B 10/18/22 10/18/22 mb BJ22008 Chlorornethane ND 1 ug/kg 4.00 EPA 50308 EPA 82608 10/18/22 10/18/22 mb BJ22008 Vinyl chloride (Chloroethylene) ND 1 ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb 6]22008 Bromomethane (Methyl bromide) ND 1 ug/kg 4.00 EPA 5030B EPA 82606 10/18/22 10/18/22 mb 8]22008 Chloroethane ND 1 ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb 6]22008 Trlchlorofiuoromethane (FC-11) ND ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb BJ22008 1,1-Dichloroethene ND 1 ug/kg 4.00 EPA 5030B EPA 82608 10/18/22 10/18/22 mb 8J22008 Carbon disulfide ND ug/kg 40.0 EPA 50308 EPA 8260B 10/18/22 10/18/22 mb BJ220D8 Methylene chloride (Dichloromethane) ND 1 ug/kg 20.0 EPA 50306 EPA 82606 10/18/22 10/18/22 mb BJ22008 Acetone ND 1 ug/kg 80.0 EPA 50306 EPA 82608 10/18/22 10/18/22 mb 6)22008 trans-1,2-Dichloroethene ND ug/kg 4.00 EPA 5030B EPA 82606 10/18/22 10/18/22 mb 6]22008 Methyl tert-butyl ether (MTBE} ND ug/kg 4.00 EPA 50306 EPA 82606 10/18/22 10/18/22 mb 8]22008 Tert-butyl alcohol ND 1 ug/kg 20.0 EPA 50306 EPA 82608 10/18/22 10/18/22 mb 8J22008 Di-isopropy! ether ND 1 ug/kg 4.00 EPA 50306 EPA 8260B 10/18/22 10/18/22 mb 6J22008 1,1-Dlchloroethane ND 1 ug/kg 4.00 EPA 50306 EPA 82606 10/18/22 10/18/22 mb BJ22008 Ethyl tert-butyl ether ND ug/kg 4.00 EPA 5030B EPA 82606 10/18/22 10/18/22 mb 8]22008 Vinyl acetate ND 1 ug/kg 40.0 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb B122008 2,2-Dlchloropropane ND 1 ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb 6]22008 c!s-1,2-Dichloroethene ND 1 ug/kg 4.00 EPA 50308 EPA 82608 10/18/22 10/18/22 mb 8]22008 Bromochloromethane ND 1 ug/kg 4.00 EPA 5030B EPA 82608 10/18/22 10/18/22 mb BJ22008 Chloroform ND ug/kg 4.00 EPA 50306 EPA 82608 10/18/22 10/18/22 mb BJ22008 Carbon tetrachloride ND 1 ug/kg 4.00 EPA 50306 EPA 82608 10/18/22 10/18/22 mb BJ22008 1,1,1-Trichloroethane ND 1 ug/kg 4.00 EPA 50306 EPA 82608 10/18/22 10/18/22 mb BJ22008 1, 1 ·D!ch!oropropene ND ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb 6J22008 2-8utanone (MEK) ND 1 ug/kg 40.0 EPA 5030B EPA 82606 10/18/22 10/18/22 mb 8]22008 Benzene ND 1 ug/kg 2.00 EPA 50308 EPA 8260B 10/18/22 10/18/22 mb 6]22008 Tert-amyl methyl ether ND 1 ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb 8]22008 1,2-Dichloroethane ND ug/kg 4.00 EPA 50308 EPA 82608 10/18/22 10/18/22 mb 6]22008 Trlchloroethene (TCE) ND 1 ug/kg 4.00 EPA 50308 EPA 8260B 10/18/22 10/18/22 mb 8)22008 Dibromomethane ND 1 ug/kg 4.00 EPA 50308 EPA 8260B 10/18/22 10/18/22 mb BJ22008 1,2-Dichloropropane ND 1 ug/kg 4.00 EPA 50308 EPA 82606 10/18/22 10/18/22 mb BJ22008 8romodichloromethane ND 1 ug/kg 4.00 EPA 50306 EPA 82608 10/18/22 10/18/22 mb BJ22008 1,4-Dloxane ND TIC 1 ug/kg 80.0 EPA 50308 EPA 82608 10/18/22 10/18/22 mb B122008 cis-1,3-D!ch!oropropene ND ug/kg 4.00 EPA 50306 EPA 8260B 10/18/22 10/18/22 mb 8122008 Toluene ND 1 ug/kg 2.00 EPA 50308 EPA 82606 10/18/22 10/18/22 mb BJ22008 Tetrachloroethene (PCE) ND ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb BJ22008 4-Methyl-2-pentanone (MIBK) ND 1 ug/kg 40.0 EPA 50308 EPA 82608 10/18/22 10/18/22 mb BJ22008 trans-1,3-Dichloropropene ND 1 ug/kg 4.00 EPA 50308 EPA 82608 10/18/22 10/18/22 mb 6]22008 1,1,2-Trich!oroethane ND 1 ug/kg 4.00 EPA 5030B EPA 82608 10/18/22 10/18/22 mb 6]22008 DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB p E

LAB SERVICE
EFI Global
317 S. Isis Avenue, Suite 207
Inglewood, CA 90301
781 East Washington Blvd., Los Angeles, CA 90021
(213} 745-5312 FAX(213)745-6312
Certificate of Analysis Page 3 of 10
File #:74354
Report Date: 10/21/22
Submitted: 10/14/22
PLS Report No.: 2210163
Attn: Daniel Jablonski Phone: (310) 854-6300 FAX:(310) 854-0199 Project: 045.09844 - 344 Foothill Rd., Beverly Hills, 90210 Dibromoch!oromethane
1,3-Dlchloropropane
1,2-Dlbromoethane (EDB)
2-Hexanone (MBK)
Chlorobenzene
Ethylbenzene
1, 1,1,2-Tetrachloroethane
m,p-Xylene
a-Xylene
Styrene
8romoform (Trlbromomethane)
lsopropylbenzene (Cumene)
Bromabenzene
n-Propylbe nzene
1, 1,2,2-Tetrachloroethane
2-Chlorotoluene
1,2,3-Trichloropropane
1,3,5-Trimethylbenzene
4-Chloroto luene
tert-Butylbenzene
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
NO
ND
ND
ND
ND
ND
ND
ND
1 1
1 1
1 1
1 1
1 1
1 1
1 ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb BJ22008 ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb BJ22008 ug/kg 4.00 EPA 5030B EPA 82608 10/18/22 10/18/22 mb 8)22008 ug/kg 40.0 EPA 5030B EPA 82608 10/18/22 10/18/22 mb 8]22008 ug/kg 4.00 EPA 50308 EPA 82608 10/18/22 10/18/22 mb BJ22008 ug/kg 2.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb 8]22008 ug/kg 4.00 EPA 5030B EPA 82608 10/18/22 10/18/22 mb BJ22008 ug/kg 2.00 EPA 5030B EPA 82608 10/18/22 10/18/22 mb BJ22008 ug/kg 2.00 EPA 50308 EPA 82608 10/18/22 10/18/22 mb 8J22008 ug/kg 4.00 EPA 50308 EPA 82608 10/18/22 10/18/22 rnb 8J22008 ug/kg 4.00 EPA 5030B EPA 82608 10/18/22 10/18/22 mb 8]22008 ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb BJ22008 ug/kg 4.00 EPA 50308 EPA 8260B 10/18/22 10/18/22 mb BJ22008 ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb BJ22008 ug/kg 4.00 EPA 50308 EPA 82608 10/18/22 10/18/22 mb 8]22008 ug/kg 4.00 EPA 50308 EPA 8260B 10/18/22 10/18/22 mb 8)22008 ug/kg 4.00 EPA 50308 EPA 82608 10/18/22 10/18/22 mb BJ22008 ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb BJ22008 ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb BJ22008 ug/kg 4.00 EPA 50308 EPA 8260B 10/18/22 10/18/22 mb BJ22008 1,2,4-Trimethylbenzene ND 1 ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb 8)22008 sec-Butylbenzene ND 1 ug/kg 4.00 EPA 5030B EPA 82608 10/18/22 10/18/22 mb BJ22008 4-Isopropyltoluene ND 1 ug/kg 4.00 EPA 5030B EPA 82608 10/18/22 10/18/22 mb BJ22008 1,3-Dichlorobenzene ND 1 ug/kg 4.00 EPA 5030B EPA 82608 10/18/22 10/18/22 mb BJ22008 1,4-Dichlorobenzene ND 1 ug/kg 4.00 EPA 50308 EPA 8260B 10/18/22 10/18/22 mb BJ22008 n-8utylbenzene ND 1 ug/kg 4.00 EPA 50308 EPA 82608 10/18/22 10/18/22 mb BJ22008 1,2-Dichlorobenzene ND 1 ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb BJ22008 1,2-Dibromo-3-chloropropane (D8CP) ND 1 ug/kg 4.00 EPA 50308 EPA 82608 10/18/22 10/18/22 mb BJ22008 1,2,4-Trich!orobenzene NO ug/kg 4.00 EPA 50308 EPA 8260B 10/18/22 10/18/22 mb BJ22008 Hexachlorobutadiene ND ug/kg 4.00 EPA 50308 EPA 8260B 10/18/22 10/18/22 mb BJ22008 Naphthalene ND 1 ug/kg 4.00 EPA 5030B EPA 8260B 10/18/22 10/18/22 mb BJ22008 __ 1,2,3-Trichlorobenzene ___________ Np ___________ ! ___ ug/kg ___ 4:0~ __ ~P_A _s_o~o~ ___ ~P!', _8~6_9~ ___ 10/18/22 ___ 10/18/22 ___ rrib_ __ B~2_,2QO_B_ Surrogate: Dibromof!uoromethane
Surrogate: Toluene-dB
Surrogate: 4-Bromofluorobenzene
Analyte
Antimony
Arsenic
Barium
Beryl!lum
Cadmium
Chromium
Cobalt
Copper
Lead
Molybdenum
Nickel
Selenium
Silver
103%
101 %

94.6%
Results
ND

16.3 133
ND

1.28 34.5

11.5 29.1

21.2 1.49

20.7 NO
ND
Flag D.F.
1 1
1 1
1 1
1 1
74-121 EPA 5030B EPA 82608 10/18/22 10/18/22 mb 8122008 80-120 EPA 50308 EPA 82608 10/18/22 10/18/22 mb BJ22008 74-126 EPA 50308 EPA 82608 10/18/22 10/18/22 mb 8122008 Units PQL Prep{Test Method Prepared Analyzed By Batch
mg/kg 2.00 EPA 3050B EPA 60108 10/18/22 10/18/22 RP/JK BJ21929 mg/kg 2.00 EPA 30508 EPA 60108 10/18/22 10/18/22 RP/JK BJ21929 mg/kg 1.00 EPA 30508 EPA 6010B 10/18/22 10/18/22 RP/JK BJ21929 mg/kg 1.00 EPA 3050B EPA 6010B 10/18/22 10/18/22 RP/JK BJ21929 mg/kg 1.00 EPA 3050B EPA 6010B 10/18/22 10/18/22 RP/JK BJ21929 mg/kg 1.00 EPA 3050B EPA 60108 10/18/22 10/18/22 RP/JK BJ21929 mg/kg 1.00 EPA 30508 EPA 6010B 10/18/22 10/18/22 RP/JK Bl21929 mg/kg 1.00 EPA 30508 EPA 6010B 10/18/22 10/18/22 RP/JK Bl21929 mg/kg 1.00 EPA 30508 EPA 6010B 10/18/22 10/18/22 RP/JK Bl21929 mg/kg 1.00 EPA 3050B EPA 60108 10/18/22 10/18/22 RP/JK BJ21929 mg/kg 1.00 EPA 30508 EPA 6010B 10/18/22 10/18/22 RP/JK BJ21929 mg/kg 2.00 EPA 30508 EPA 6010B 10/18/22 10/18/22 RP/JK BJ21929 mg/kg 1.00 EPA 3050B EPA 6010B 10/18/22 10/18/22 RP/JK BJ21929 DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB E

LAB SERVICE
781 East Washington Blvd,, Los Angeles, CA 90021
(213) 745-5312 FAX (213) 745-6372
Certificate of Analysis Page 4 of 10
File #:74354
EFI Global
317 S. Isis Avenue, Suite 207
Inglewood, CA 90301
Attn: Daniel Jablonski Phone: (310) 854-6300 FAX:(310) 854-0199 Project: 045.09844 - 344 Foothill Rd., Beverly Hills, 90210 Thallium
Vanadium
Zinc
Analyte
Mercury
ND

58.3 104
Results
ND
1 mg/kg
1 mg/kg
1 mg/kg
Flag D.F. Units
mg/kg

2.00 EPA 3050B EPA 60108

1.00 EPA 3050B EPA 6010B

5.00 EPA 3050B EPA 6010B
PQL Prep{Test Method

0.100 EPA 7471A EPA 7471A
Report Date: 10/21/22
Submitted: 10/14/22
PLS Report No.: 2210163
10/18/22 10/1B/22 RP/JK 8l21929
10/18/22 10/18/22 RP/JK BJ21929
10/18/22 10/18/22 RP/JK BJ21929
Prepared Analyzed By Batch
10/18/22 10/19/22 jks 8]21932
I
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB

POSITIVE

0.0309 mg/kg 0.03000
Prepared & Analyzed: 10/ 17 /22

0.782 0.500 mg/kg 0.9096
Prepared & Analyzed: 10/18/22

1.23 O. 500 mg/kg 1.819 ND
Prepared & Analyzed: 10/18/22

1.15 0.500 mg/kg____ 1.819 ND
Prepared: 10/17/22 Analyzed: 10/18/22
ND 2.50 mg/kg
ND 100 mg/kg
ND 100 mg/kg

20.7 mg/kg 20.83
Prepared: 10/17/22 Analyzed: 10/18/22
674 12.5 mg/kg 554.7

23.6 mg/kg 20.83
Prepared: 10/17/22 Analyzed: 10/18/22
115 2.50 mg/kg 110.9 ND

23.2 mg/kg 20.83
Prepared:10/17/22 Analyzed: 10/18/22
113 2.50 mg/kg 110.9 ND
Prepared & Analyzed: 10/17 /22
ND 4.00 ug/kg
ND 4.00 ug/kg
ND 4.00 ug/kg
ND 4.00 ug/kg
ND 4.00 ug/kg
ND 4.00 ug/kg
ND 4.00 ug/kg
ND 40. 0 ug/kg
ND 20.0 ug/kg
ND 80.0 ug/kg
ND 4.00 ug/kg
103 41-131

85.9 58-116

67.8 48-118
48-118

99.2 46-149
122 55-140
113 49"168
103 35-143
111 48-155
101 35-143
118 48-155

Page 5 of 10 ends

Flle #:74354
Report Date: 10/21/22
Submitted: 10/14/22
PLS Report No.: 2210163
6,81 30

1.72 30
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB

OSITIVE

LAB SERVICE
EFI Global
317 S. Isis Avenue, Suite 207
Inglewood, CA 90301
781 East Washington Blvd., Los Angeles, CA 90021
(213) 745-5312 FAX(213)745-6372
Certificate of Analysis Page 6 of 10
File #:74354
Report Date: 10/21/22
Submitted: 10/14/22
PLS Report No.: 2210163
Attn: Daniel Jablonski Phone: (310) 854-6300 FAX:(310) 854-0199 Project: 045.09844 - 344 Foothill Rd., Beverly Hills, 90210 Quality Control Data
1~:#.1¥~:!M~%~.~,:f:~&A:~g*~':::, :::: ! :: ::

Methyl tert-butyl ether (MTBE) ND 4.00 ug/kg
Tert-butyl alcohol ND 20.0 ug/kg
Di-isopropyl ether ND 4.00 ug/kg
1,1-Dlchloroethane ND 4.00 ug/kg
Ethyl tert-butyl ether ND 4.00 ug/kg
Vinyl acetate ND 40.0 ug/kg
2,2-Dichloropropane ND 4.00 ug/kg
cis-1,2-Dichloraethene ND 4.00 ug/kg
Bramochloromethane ND 4.00 ug/kg
Chloroform ND 4.00 ug/kg
Carbon tetrachloride ND 4.00 ug/kg
1, 1,1-Trlchloraethane ND 4.00 ug/kg
1,1-Dlchlorapropene ND 4.00 ug/kg
2-Butanone {MEK} ND 40.0 ug/kg
Benzene ND 2.00 ug/kg
Tert-amyl methyl ether ND 4.00 ug/kg
1,2-Dichloroethane ND 4.00 ug/kg
Trichloroethene (TCE) ND 4.00 ug/kg
Dibromomethane ND 4.00 ug/kg
1,2-Dichloropropane ND 4.00 ug/kg
Bramodichloromethane ND 4.00 ug/kg
1,4-Dioxane ND 80.0 ug/kg
cls-1,3-Dlchlorapropene ND 4.00 ug/kg
Toluene ND 2.00 ugl_~,~
Tetrachloroethene (PCE) ND 4.00 ug/kg
4-Methyl-2-pentanone (MIBK) ND 40.0 ug/kg
trans-1,3-Dlchloroprapene ND 4.00 ug/kg
1, 1,2-Trichloroethane ND 4.00 ug/kg
Dibromochloromethane ND 4.00 ug/kg
1,3-Dichlaropropane ND 4.00 ug/kg
1,2-Dlbramoethane {EDB) ND 4.00 ug/kg
2-Hexanone (MBK) ND 40.0 ug/kg
Ch lorabenzene ND 4.00 ug/kg
Ethyl benzene ND 2.00 ug{kg
1,1,1,2-Tetrachloroethane ND 4.00 ug/kg
m,p-Xylene ND 2.00 ug/kg
a-Xylene ND 2.00 ug/k9
Styrene ND 4.00 ug/kg
Bramoform (Tribromomethane} ND 4.00 ug/kg
Isopropylbenzene (Cumene) ND 4.00 ug/kg
Bromobenzene ND 4.00 ug/kg
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB IVE

LAB SERVICE
781 East Washington Blvd., Los Angeles, CA 90021
(213) 745-5312 FAX (213) 745-6372
EFI Global
317 S. Isis Avenue, Suite 207
Inglewood, CA 90301
Attn: Daniel Jablonski
Certificate of Analysis
Phone: (310) 854-6300 FAX:(310) 854-0199
Project: 045.09844 - 344 Foothill Rd., Beverly Hills, 90210 Quality Control Data
113~~5~ B.J:Z?(JO~?) ~P,~ S,.~3?13>·
__ n:Propylbenzene ND 4.00 u9/kg
___ .!,1,2,2-Tetrachloroethane ND 4.00 ug/kg
2-Chlorotoluene ND 4.00 ug/kg -·
1,2,3-Trichloropropa_ne ND 4.00 ug/kg
1,3,5-Trimethylbenzene ND 4.00 ug/kg
4-Chlorotoluene ND 4.00 ug/kg
-----•~~~
tert-Butylbenzene ND 4.00 ug/kg
1,2,4-Trimethylbenzene ND 4.00 ug/kg
sec-Butylbenzene ND 4.00 ug/kg
4-lsopr
□py!toluene
ND 4.00 ug/kg
1,3-Dichlorobenzene ND 4.00 ug/kg
1,4-Dichloroben_zene ND 4.00 ug/kg
-~~Butylbenzene ND 4.00 ug/kg
1,2-Dlchlorobenzene ND 4.00 ug/kg
1,2-D!bromo-3-chioropropane (DBCP) ND 4.00 ug/kg
1,2,4-Trlchlorabenzene ND 4.00 ug(kg
Hexachlorobutadiene ND 4.00 ug/kg
_Naphthalene ND 4.00 ug/kg
~3_-T~ichlorobenzene ND 4.00 ug/kg
Surrogate: Dibromof!uoromethane 10.8 ug/kg 10.00
Surrogate: Toluene-dB 9.92 ug/kg 10.00
Surrogate: 4-Bromofluorobenzene 9.51 ug/kg 10.00
LCS Prepared & Analyzed: 10/17 /22
1, 1 -Dlchloroethene 18.1 4.00 ug/kg 20.00
Methyl tert-butyl ether (MT~E) 14.5 4.00 ug/kg 20.00
Benzene 19.2 2.00 ug/kg 20.00
Trichloroethene (TCE) 18.6 4.00 ug/kg 20.00
Toluene 19.4 2.00 ug/kg 20.00
Chlorobenzene 19.4 4.00 ug/kg 20.00
Surrogate: Dibromotluoromethane 9.85 ug/kg 10.00
Surrogate: Toluene-dB 9.71 ug/kg 10.00
Surrogate: 4-Bromoffuorobenzene 9.46 ug/kg 10.00
Matrix Spike Source: 221.0153-01 Prepared &Analyzed: 10/20/22 1,1-D(ch!oroethene 17.6 4.00 ug/kg 20.00 ND
Benzene 19.0 2.00 ug/kg 20.00 ND
Tr(chloraethene (TCE) 19.1 4.00 ug/kg 20.00 ND
Toluene 19.9 2.00 ug/kg 20.00 ND
Chlorobenzene 20.2 4.00 ~9/kg 20.00 ND
Surrogate: Dlbromotluoromethane 9.93 ug/kg 10.00
Surrogate: Toluene-dB 9.83 ug/kg 10.00
Surrogate: 4-Bromotluorobenzene 9.94 ug/kg 10.00
108

99.2 95.1

90.6 72.5

95.8 93.0

96.8 96.9

98.5 97.1

94.6 87.8

95.1 95.6

99.5 101

99.3 98.3

99.4 74-121
80-120
74-126
64-137
62-123
65-120
72-120
69-120
67-123
79-120
80-120
80-120
63·144
63-124
61-136
57-132
46-157
76-120
80-120
80-120

Page 7 of 10 ends

File #:74354
Report Date: 10/21/22
Submitted: 10/14/22
PLS Report No.: 2210163
,,.-----
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB

POSITIVE

18.0 4.00 ug/kg 20.00 ND

18.4 2.00 ug/kg 20.00 ND

19.6 4.00 ug/kg 20.00 ND

17.3 2.00 ug/kg 20.00 ND

20.00 89.8 63-144

92.2 63-124

97.8 61-136

86.4 57-132

92.4 46-157

Page 8 of 10 ends

File #:74354
Report Date: 10/21/22
Submitted: 10/14/22
PLS Report No.: 2210163

2.31 30

3.15 30

2.27 30

14.1 30

8.95 30 Chlorobenzene -------------------"'----'"---------=------------------- 18.5 4.00 ug/kg ND Surrogate: Dibromofluoromethane
Surrogate: Toluene-dB
Surrogate: 4-Bromofluorobenzene
Blank
Antimony
Arsenic
Barium
Beryllium
Cadmium
Chromium
Cobalt
Copper
Lead
Molybdenum
Nickel
Selenium
Silver
Thallium
Vanadium
Zinc
LCS
Antimony
Arsenic

10.6 ug/kg 10.00 106 76-120

9.31 ug/kg 10.00 93.1 80-120

10.3 ug/kg 10.00 103 80-120
:;~'';.';,;::;':_•;;; ;'.[',jil(;'~::#;;:;~~~:;~i0;'.}:,:·;:,~; I Prepared &Analyzed: 10/18/22
ND 2.00 mg/kg
ND 2.00 mg/kg
ND 1.00 mg/kg
ND 1.00 mg/kg
ND 1.00 mg/kg
ND 1.00 mg/kg
ND 1.00 mg/kg
ND 1.00 mg/kg
ND 1.00 mg/kg
ND 1.00 mg/kg_
ND 1.00 mg/kg
ND 2.00 mg/kg
ND 1.00 mg/kg
ND 2.00 mg/kg
ND 1,00 mg/kg
ND 5.00 mg/kg
Prepared & Analyzed: 10/18/22

44.7 2.00 mg/kg 49.40 90.5 60-140

47.4 2.00 mg/kg 49.33 96.0 80-120 ----------------------~=---------------------------- Barium 209 1.00 mg/kg 198.1 105 80-120
Beryllium 4.55 1.00 ~~/kg 5.000 90.9 80-120
Cadmium 4.93 1.00 mg/kg 5.000 98.7 80-120
Chromium 19.6 1.00 mg/kg 19.91 98.5 80-120
Cobalt 51.2 1.00 mg/kg 50.00 102 80-120
Copper 24.3 1.00 mg/kg 25.10 96.7 80-120
Lead 50.0 1.00 mg/kg 49.97 100 80-120
Molybdenum 44.8 1.00 mg/kg 49.85 89.9 80-120
Nickel 52.3 1.00 mg/kg 50.00 105 80-120
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB

POSITIVE

LAB SERVICE
781 East Washington Blvd., Los Angeles, CA 90021
(213)745-5312 FAX(213)745-6372
EFI Global
317 S. Isis Avenue, Suite 207
Inglewood, CA 90301
Attn: Daniel Jablonski
Certificate of Analysis
Phone: (310) 854-6300 FAX:(310) 854-0199
Project: 045.09844 - 344 Foothill Rd., Beverly Hills, 90210 Quality Control Data
1,~*t~~:ij~~~~~:ri~*A~eM,:u':,:,\
Selenium 47.7 2.00 mg/kg 49.60
Silver 4.45 1.00 mg/kg 5.000
Thallium so.a 2.00 mg/kg 49.80
Vanadium 46.4 1.00 mg/kg 50.10
Zinc 48.3 5.00 mg/kg 49.82
Matrix Spike Source: 2210148-01 Prepared&. Analyzed: 10/18/22 Antimony 44.7 2.00 mg/kg 49.40 ND
Arsenic 51.2 2.00 mg/kg 49.33 2.93
Barium 239 1.00 mg/kg 198.1 40.9
Beryllium 4.68 1.00 mg/kg 5.000 0.209
Cadmium 4.90 1.00 mg/kg 5.000 0.261
Chromium 39.3 1.00 mg/kg 19.91 16.8
Cobalt 53.4 1.00 mg/kg 50.00 6.04
Copper 37,7 1.00 mg/kg 25.10 12.8
Lead 56.7 1.00 mg/kg 49.97 9.63
Molybdenum 44.6 1.00 mg/kg 49.85 0.885
Nickel 68.6 1.00 mg/kg 50.00 16.5
Selenium 46.6 2.00 mg/kg 49.60 ND
Sliver 4.57 1.00 mg/kg 5,000 ND
Thall!um 44.0 2.00 mg/kg 49.80 ND
Vanadium 69.7 1.00 mg/kg 50.10 23.5
Zinc 90.5 s.oo mg/kg 49.82 41.7
Matrix Spike Dup Source: 2210148-01 Prepared &Analyzed: 10/18/22 Antimony 43.1 2.00 mg/kg 49.40 ND
Arsenic 48.6 2.00 mg/kg 49.33 2.93
Barium 286 1.00 mg/kg 198.1 40.9
Beryllium 4.87 1.00 mg/kg 5.000 0.209
Cadmium 4.92 1.00 mg/kg 5.000 0.261
Chromium 38.6 1.00 mg/kg 19.91 16.8
Cobalt 55.2 1.00 mg/kg SO.OD 6.04
Copper 46.1 1.00 mg/kg 25.10 12.8
Lead 58.2 1.00 mg/kg 49.97 9.63
Molybdenum 42.1 1.00 mg/kg 49.85 0.885
Nickel 66.2 1.00 mg/kg 50.00 16.5
Selenium 44.0 2.00 mg/kg 49.60 ND
Silver 4.27 1.00 mg/kg 5.000 ND
Thallium 41.3 2.00 mg/kg 49.80 ND
Vanadium 81.3 1.00 mg/kg 50.10 23.5
Zinc 112 5.00 mg/kg, ___ 49.82 41.7

96.1 80-120

89.0 80-120
100 B0-120

92.7 60-120

96.9 60-120

90.6 60-140

97.9 75-125
100 75-125

89.3 75-125

92.8 75-125
113 75-125

94.7 75-125

99.2 75-125

94.2 75-125

87.6 75-125
104 75-125

94.0 75-125

91.5 75-125

88.3 75-125

92.2 75-125

98.0 75-125

87.2 60-140

92.6 75-125
124 75-125

93.3 75-125

93.1 75-125
109 75-125

98.3 75-125
133 75-125

97.1 75-125

82.7 75-125

99.4 75-125

88.8 75-125

85.3 75-125

82.9 75-125
115 75-125
142 75-125

Page 9 of 10 ends

File #:74354
Report Date: 10/21/22
Submitted: 10/14/22
PLS Report No.: 2210163

3.76 30

5.59 30

21.2 30

4.36 30

0.407 30

3.39 30
3,81 30

28.8 30 V-2

3.03 30

5.78 30

4.72 30

5.70 30

6.97 30

6.30 30

22.3 30

36.6 30 V-2
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB

POSITIVE

LAB SERVICE
781 East Washington Blvd., Los Angeles, CA 90021
(213)745-5312 FAX(213)745-6372
Certificate of Analysis
EFI Global
317 S. Isis Avenue, Suite 207
Inglewood, CA 90301
Attn: Daniel Jablonski Phone: (310) 854-6300 FAX:(310) 854-0199 Project: 045.09844 - 344 Foothill Rd., Beverly Hills, 90210 Blank
Mercury
LCS
Mercury
Matrix Spike Source: 2210148-01
Mercury
Matrix Spike Dup Source: 2210148-01
_______ Mercury
Quality Control Data
Prepared: 10/18/22 Analyzed: 10/19/22
ND 0.100 mg/kg
Prepared: 10/18/22 Analyzed: 10/19/22

0.760 0.100 mg/kg 0.8258
Prepared: 10/18/22 Analy,:ed: 10/19/22
o. 742 0.100 mg/kg 0.8258
Prepared: 10/18/22 Analyzed: 10/19/22

0.770 0.100 mg/kg _ 0.8258
Notes and Definitions
V-2 Out-of-Range recovery was due to sample Heterogeneity.

TIC Estimated Concentration for Tentatively Identified Compound NA Not Appl!cable
ND Analyte NOT DETECTED at or above the reported llmit(s) NR
MDL
PQL
Not Reported
Method Detection Limit
Practical Quantitatlon Limit
ND
ND
Environmental Laboratory Accreditation Program Certificate No. 1131, Mobile Lab No. 2534, LACSD No. 10138

92.1 89.9

93.3 80-120
75-125
75-125

Page 10 of 10 ends

File #:74354
Report Date: 10/21/22
Submitted: 10/14/22
PLS Report No.: 2210163

3.68 25
Authorized Signature(s)
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB EFIGlobaI®
E11g1neenns. Flre& En1n romnentalServ1ces
Analytical Laboratory:

Project Name:

Project Address:

Project Manager:

Sampled by:

Phone:

Email:
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5261 W es t I mpena 19 way, • I H" h L OS A ngees CA 90045 Tel: (310) 854--6300 Fax: (310) 854-0199 www.AndersenEnviro.com "-..,.,.. <::..o ,....,,, ~ ~S- ~ c;.~-~
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OBSERV. TEMP: ~•c .. • 1:,/Ylf)----. : \..

THERMO ID:~ BY: ii,._
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB

POSITIVE

LAB SERVICE
781 East Washington Blvd., Los Angeles, CA 90021
(213)745-5312 FAX (213)745-6372
October 19, 2022
Daniel Jablonski
EFI Global
317 S. Isis Avenue, Suite 207
Inglewood, CA 90301
Report No.: 2210164 Project Name: 045.09844 - 344 Foothill Rd., Beverly Hills, 90210 Dear Daniel Jablonski,
This report contains the analytical results for the sample(s) received under chain of custody(s) by Positive Lab Service on October 14, 2022.

If you have any questions in reference to this report, please contact your Positive Lab Service coordinator.

Page 1 of 2 ends

DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB E

47.4 2.00 mg/kg 49.33
Prepared & Analyzed: 10/18/22

51.2 2.00 mg/kg 49.33
Prepared & Analyzed: 10/18/22

48.6 2.00 mg/kg 49.33
Notes and Definitions
NO Analyte NOT DETECTED at or above the reported llmit(s) NR Not Reported
MDL Method Detection Limit
PQL Practical Quantitation Limit
EPA 6010B

96.0 2.93 97.9

2.93 92.6
Environmental Laboratory Accreditation Program Certificate No. 1131, Mobile Lab No. 2534, LACSD No. 10138

Page 2 of 2 ends

file #:74354
Report Date: 10/19/22
Submitted: 10/14/22
PLS Report No.: 2210164
Prepared Analyzed By Batch
10/18/22 10/18/22 RP/JK BJ21929
··.,<·., •• 1
Prepared Analyzed By Batch
10/18/22 10/18/22 RP/JK B121929
Prepared Analyzed By Batch
10/18/22 10/18/22 RP/JK 6)21929
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Prepared Analyzed By Batch
10/18/22 10/18/22 RP/JK B321929
<.•••··••<v• •. j
Prepared Analyzed By Batch
10/18/22 10/18/22 RP/JK BJ21929
I
Prepared Analyzed By Batch
10/18/22 10/18/22 RP/JK 8)21929
80-120
75-125
75-125 5.59 30
Authorized Signature(s)
DocuSign Envelope ID: BE39AB09-396B-47C7-9EAD-65EACCAE21BB EFIGlobal® EFI Global
5261 West Imperial Highway Los Angeles CA 90045
Engmeert~F,re& Envucnmenta!Serv1CF.=S Tel: (310) 854-6300 Fax: (310) 854-0199 www.AndersenEnviro.com Analytical Laboratory:

Project Name: ~~ .... ,;:...o~-,, ~ o ....,~ . ~ .._, ~"" Project Address: "' \ \ 9-,e,..,,'-" - -- 'W\., ,"-- "\ 0 ?--o Project Manager: •· .Qic--., " .e,.,' ""C: c...'-'°-~--, Sampled by: 9 . __ ,
Phone: "-~'b '\ ~ -- ~ {.Q (,
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Type Matrix Preservative Sampling Information
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Y/~ 10/t';/'Q ll-(00' ? /~~ (Of 17/2.2_
V
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Chain-of-Custody Record
'I'
AE_EFI_01
Method Container Turnaround
Time
<( '.2' 0 LO
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Time Remarks
1i,ac, Sample condition (circle)~ Intact OBSERV. TEMP:~? ---- CORREC. TEMP:.~' 1 . ,.,. -- 7 -n,, .. . ·-·- -
•c
•c
~
Certificate Of Completion
Envelope Id: BE39AB09396B47C79EAD65EACCAE21BB Status: Completed Subject: Complete with DocuSign: Emilio Ramirez dba RAMCO - 334 Foothill Rd Parking Lot Source Envelope:

Document Pages: 151 Signatures: 6 Envelope Originator:

Certificate Pages: 2 Initials: 1 Erin Justus
AutoNav: Enabled
EnvelopeId Stamping: Enabled
Time Zone: (UTC-08:00) Pacific Time (US & Canada)
455 N. Rexford Drive
Beverly Hills, CA 90210
[email protected]
IP Address: 198.245.189.169
Record Tracking
Status: Original
1/3/2024 4:49:32 PM
Holder: Erin Justus
[email protected]
Location: DocuSign
Signer Events Signature Timestamp

EMILIO RAMIREZ
[email protected]
President
Ramco General Engineering Contractors, Inc
Security Level: Email, Account Authentication
(None)
Signature Adoption: Pre-selected Style
Using IP Address: 174.243.149.41
Sent: 1/3/2024 5:10:00 PM
Viewed: 1/3/2024 5:44:44 PM
Signed: 1/3/2024 5:44:56 PM
Electronic Record and Signature Disclosure:

Not Offered via DocuSign
Deborah R. Hakman for
[email protected]
Security Level: Email, Account Authentication
(None)
Signature Adoption: Pre-selected Style
Using IP Address: 172.116.62.172
Signed using mobile
Sent: 1/3/2024 5:45:01 PM
Viewed: 1/3/2024 6:48:16 PM
Signed: 1/3/2024 6:48:41 PM
Electronic Record and Signature Disclosure:

Not Offered via DocuSign
Sharon L'Heureux Dressel
[email protected]
Risk Manager
Sharon Dressel
Security Level: Email, Account Authentication
(None)
Signature Adoption: Pre-selected Style
Using IP Address: 198.245.189.166
Sent: 1/3/2024 6:48:46 PM
Viewed: 1/4/2024 1:00:01 PM
Signed: 1/4/2024 1:00:09 PM
Electronic Record and Signature Disclosure:

Not Offered via DocuSign
Mandana Motahari
[email protected]
Security Level: Email, Account Authentication
(None)
Signature Adoption: Pre-selected Style
Using IP Address: 142.129.123.238
Signed using mobile
Sent: 1/4/2024 1:00:15 PM
Viewed: 1/6/2024 7:30:25 AM
Signed: 1/6/2024 7:31:00 AM
Electronic Record and Signature Disclosure:

Not Offered via DocuSign
DocuSign·
Signer Events Signature Timestamp
Shana E. Epstein
[email protected]
Director of Public Works
Security Level: Email, Account Authentication
(None) Signature Adoption: Pre-selected Style
Using IP Address: 23.242.81.95
Signed using mobile
Sent: 1/6/2024 7:31:07 AM
Viewed: 1/6/2024 8:39:37 AM
Signed: 1/6/2024 8:40:54 AM
Electronic Record and Signature Disclosure:

Not Offered via DocuSign
Logan Phillippo
[email protected]
Real Property Development Manager
City of Beverly Hills
Security Level: Email, Account Authentication
(None)
Signature Adoption: Uploaded Signature Image
Using IP Address: 198.245.189.166
Sent: 1/6/2024 8:41:01 AM
Resent: 1/8/2024 7:57:11 AM
Viewed: 1/8/2024 7:58:28 AM
Signed: 1/8/2024 8:00:09 AM
Electronic Record and Signature Disclosure:

Not Offered via DocuSign
Nancy Hunt-Coffey
[email protected]
City Manager
Security Level: Email, Account Authentication
(None) Signature Adoption: Pre-selected Style
Using IP Address: 108.147.93.106
Signed using mobile
Sent: 1/8/2024 8:00:15 AM
Viewed: 1/8/2024 9:21:36 AM
Signed: 1/8/2024 9:22:14 AM
Electronic Record and Signature Disclosure:

Not Offered via DocuSign
In Person Signer Events Signature Timestamp
Editor Delivery Events Status Timestamp
Agent Delivery Events Status Timestamp
Intermediary Delivery Events Status Timestamp
Certified Delivery Events Status Timestamp
Carbon Copy Events Status Timestamp
Witness Events Signature Timestamp
Notary Events Signature Timestamp
Envelope Summary Events Status Timestamps
Envelope Sent Hashed/Encrypted 1/3/2024 5:10:00 PM
Certified Delivered Security Checked 1/8/2024 9:21:36 AM Signing Complete Security Checked 1/8/2024 9:22:14 AM
Completed Security Checked 1/8/2024 9:22:14 AM
Payment Events Status Timestamps

Beverly Hills City CouncilMay 21, 2024

Beverly Hills City Council
May 21, 2024